Monday, February 13, 2012

Compass Deviation

Because deviation depends upon the actual distribution of magnetic
forces within the aircraft itself, it must be obtained individually
for every magnetic compass on every aircraft. The particular procedure of
determining deviation, termed as compass swinging, ought to
be discussed within the technical purchase for each compass.
The particular net result of just about all magnetic forces of the actual aircraft (all those forces
excluding the earth’s field) is represented by a dot found
simply just behind the wings of the actual aircraft. If the aircraft can be headed
toward MN, the actual dot attracts it pole of the particular magnetic compass
(with regard to this case, the particular South Pole) yet, on this heading, does
not change its direction. The just impact is actually with amplify the
directive force of the actual earth’s field. Generally if the aircraft heads toward
magnetic east, the particular dot typically is at this point west of the compass, and even attracts
the South Pole of the actual compass, causing easterly deviation.
picture furthermore shows that the deviation can be zero on a south
heading, and westerly when the particular aircraft can be heading west.
Deviation is reduced (however not eliminated) in certain
direct-indicating magnetic compasses by adjusting the small
compensating magnets throughout the compass case. Remaining
deviation is referred to because residual deviation and even is
determined by comparison with true values. This particular residual
deviation is actually recorded on a compass correction card showing
actual deviation on various headings or the particular compass headings.
Within the compass correction card illustrated within picture,
the navigator knows which with fly a magnetic heading (MH) of
270°, the actual pilot must steer a CH of 268°.

Compasses

%0D%0AA+compass+could+be+defined+because+an+instrument+which+indicates%0D%0Adirection+over+the+particular+earth%E2%80%99s+surface+with+reference+in+order+to+an+acknowledged%0D%0Adatum.+Various+types+of+compasses+currently+have+been+developed%2C%0D%0Aeach+of+that+can+be+distinguished+by+the+actual+particular+datum+utilized%0D%0Aas+the+actual+reference+from+that+direction+can+be+measured.+Two%0D%0Abasic+types+of+compasses+happen+to+be+throughout+present+use%3A+the+actual+magnetic%0D%0Aand+gyrocompass.%0D%0AThe+particular+magnetic+compass+uses+the+particular+lines+of+force+of+the+particular+earth%E2%80%99s%0D%0Amagnetic+field+because+a+primary+reference.+Despite+that*the%0D%0Aearth%E2%80%99s+field+can+be+commonly+distorted+by+the+actual+pressure+of+different%0D%0Alocalized+magnetic+fields%2C+it+happens+to+be+the+particular+many+widely+utilized+directional%0D%0Areference.+The+actual+gyrocompass+uses+as+its+datum+an+arbitrary%0D%0Afixed+point+throughout+space+determined+by+the+actual+initial+alignment+of+the+particular%0D%0Agyroscope+axis.+Compasses+of+this+sort+happen+to+be+widely+employed+now%0D%0Aplus+will+eventually+replace+the+magnetic+compass+entirely.%0D%0AMagnetic+Compass%0D%0AThe+magnetic+compass+indicates+direction+within+the+horizontal%0D%0Aplane+with+reference+to+the+horizontal+component+of+the+actual%0D%0Aearth%E2%80%99s+magnetic+field.+This+particular+field+is+prepared+up+of+the+earth%E2%80%99s%0D%0Afield+with+regard+to+combination+with+different+magnetic+fields+within+the+vicinity%0D%0Aof+the+actual+compass.+Many+of+these+secondary+fields+happen+to+be+caused+by+the%0D%0Apresence+of+ferromagnetic+objects.%0D%0AMagnetic+compasses+can+be+divided+into+two+classes%3A%0D%0A1.+The+particular+direct-indicating+magnetic+compass+within+which%0D%0Athe+measurement+of+direction+is+produced+by+a+direct%0D%0Aobservation+of+the+particular+position+of+a+pivoted+magnetic%0D%0Aneedle%3B+not+to+mention%0D%0A2.+The+remote-indicating+gyro-stabilized+magnetic%0D%0Acompass.%0D%0AMagnetic+direction+can+be+sensed+by+an+element+situated+at%0D%0Apositions+where+regional+magnetic+fields+are+generally+at+a+minimum%2Csuch+because+the+actual+vertical+stabilizer+and+in+addition+wing+tricks.+The+actual+direction%0D%0Ais+then+transmitted+electrically+in+order+to+repeater+indicators+on+the%0D%0Ainstrument+panels.%0D%0A%0D%0A%0D%0A%3Cb%3EDirect-Indicating+Magnetic+Compass%3C%2Fb%3E%0D%0ABasically%2C+the+actual+magnetic+compass+typically+is+a+magnetized+rod+pivoted%0D%0Aat+its+middle%2C+with+several+features+incorporated+in+order+to+better%0D%0Aits+performance.+One+kind+of+direct-indicating+magnetic%0D%0Acompass%2C+the+actual+B-16+compass+%28frequently+called+the+whiskey%0D%0Acompass.+It%27s+employed+as+a+standby%0D%0Acompass+in+case+of+failing+of+the+particular+electrical+system+that%0D%0Aoperates+the+particular+remote+compasses.+It+happens+to+be+a+reliable+compass+and+in+addition%0D%0Aprovides+wise+navigational+results+in+the+event+that+used+carefully.%0D%0AMagnetic+Variation+plus+Compass+Errors%0D%0AThe+actual+earth%E2%80%99s+magnetic+poles+tend+to+be+joined+by+irregular+curves%0D%0Agenerally+known+as+magnetic+meridians.+The+particular+angle+between+the+magnetic%0D%0Ameridian+and+in+addition+the+particular+geographic+meridian+is+generally+known+as+the+actual+magnetic%0D%0Avariation.+Variation+can+be+listed+on+charts+as+east+or+alternatively+west.%0D%0AWhen+variation+typically+is+east%2C+magnetic+north+%28MN%29+is+actually+east+of%0D%0Atrue+north+%28TN%29.+Similarly%2C+when+variation+is+actually+west%2C+MN+is+actually%0D%0Awest+of+TN.Lines+connecting+points+having%D%0Athe+actual+same+magnetic+variation+are+really+generally+known+as+isogonic+lines.%0D%0ACompensate+for+magnetic+variation+with+convert%0D%0Aa+compass+direction+with+true+direction.%0D%0A%3Cdiv+class%3D%22separator%22+style%3D%22clear%3A+both%3B+text-align%3A+center%3B%22%3E%0D%0A%3Ca+href%3D%22http%3A%2F%2F1.bp.blogspot.com%2F-NOMqn2EdVG8%2FTzkANTSFvRI%2FAAAAAAAAAF0%2F1eyJVd1Fs_k%2Fs1600%2Fcompas1.JPG%22+imageanchor%3D%221%22+style%3D%22margin-left%3A+1em%3B+margin-right%3A+1em%3B%22%3E%3Cimg+border%3D%220%22+src%3D%22http%3A%2F%2F1.bp.blogspot.com%2F-NOMqn2EdVG8%2FTzkANTSFvRI%2FAAAAAAAAAF0%2F1eyJVd1Fs_k%2Fs1600%2Fcompas1.JPG%22+%2F%3E%3C%2Fa%3E%3C%2Fdiv%3E%0D%0A%0D%0A%3Cdiv+class%3D%22separator%22+style%3D%22clear%3A+both%3B+text-align%3A+center%3B%22%3E%0D%0A%3Ca+href%3D%22http%3A%2F%2F2.bp.blogspot.com%2F-6SjdWWRbgLo%2FTzkAOl_g7oI%2FAAAAAAAAAF8%2FV86l45ZkfHc%2Fs1600%2Fcompas2.JPG%22+imageanchor%3D%221%22+style%3D%22margin-left%3A+1em%3B+margin-right%3A+1em%3B%22%3E%3Cimg+border%3D%220%22+src%3D%22http%3A%2F%2F2.bp.blogspot.com%2F-6SjdWWRbgLo%2FTzkAOl_g7oI%2FAAAAAAAAAF8%2FV86l45ZkfHc%2Fs1600%2Fcompas2.JPG%22+%2F%3E%3C%2Fa%3E%3C%2Fdiv%3E%0D%0A%0D%0A%3Cdiv+class%3D%22separator%22+style%3D%22clear%3A+both%3B+text-align%3A+center%3B%22%3E%0D%0A%0D%0A%3C%2Fdiv%3E%0D%0A%0D%0ACompass+error+typically+is+caused+by+nearby+magnetic+influences%2C+such%0D%0Abecause+magnetic+material+wiithin+the+structure+of+the+aircraft+as+well+as+its%0D%0Aelectrical+systems.+Many+of+these+magnetic+forces+deflect+a+compass%0D%0Aneedle+from+its+usual+alignment.+The+particular+amount+of+such%0D%0Adeflection+typically+is+generally+known+as+deviation+which%2C+like+variation%2C+typically+is+labeled%0D%0A%E2%80%9Ceast%E2%80%9D+or+perhaps+%E2%80%9Cwest%E2%80%9D+because+the+north-seeking+end+of+the+particular+compass+typically+is%0D%0Adeflected+east+and+%2F+or+west+of+MN%2C+respectively.%0D%0AThe+actual+correction+for+variation+and+also+deviation+typically+is+commonly+expressed%0D%0Abecause+a+plus+or+simply+minus+value+plus+can+be+computed+because+a+correction+in+order+to%0D%0Atrue+heading+%28TH%29.+When+variation+or+deviation+is+east%2C+the+actual+sign%0D%0Aof+the+particular+correction+typically+is+minus%3B+if+perhaps+west%2C+the+particular+signal+can+be+plus.+A+rule%0D%0Aof+thumb+for+this+correction+is+quite+easily+remembered+as+east+can+be%0D%0Aleast+and+west+is+very+best.%0D%0AAircraft+headings+tend+to+be+expressed+because+TH+and+%2F+or+magnetic+headings%0D%0A%28MH%29.+In+case+the+heading+is+actually+measured+in+relation+to+geographical%0D%0Anorth%2C+it+really+is+a+TH.+In+the+event+that+heading+typically+is+within+reference+in+order+to+MN%2C+it+is+actually%0D%0Aa+MH%3B+if+it+is+very+with+regard+to+reference+to+the+compass+lubber+line%2C+it+is+very%0D%0Aa+compass+heading+%28CH%29.+CH+corrected+for+variation+and+also%0D%0Adeviation+is+actually+TH.+MH+corrected+for+variation+is+TH.%0D%0AThis+particular+relationship+is+right+expressed+by+reference+to+the+actual%0D%0Anavigator%E2%80%99s+log%2C+where+the+particular+numerous+headings+and+in+addition+corrections%0D%0Ausually+are+listed+as+TH%2C+variation+%28var%29%2C+MH%2C+deviation+%28dev%29%2C+as+well+as%0D%0ACH.+%26nbsp%3BThus%2C+if+an+aircraft+typically+is+flying+in+an+area+where%0D%0Athe+actual+variation+is+10%C2%B0+E+and+even+the+particular+compass+has+a+deviation+of+3%C2%B0%0D%0AE%2C+the+particular+relationship+would+be+expressed+as+follows%2C+assuming%0D%0Aa+CH+of+125%C2%B0%3A%0D%0ATH+var+MH+dev+CH%0D%0A138+-+10+%3D+128+-+3+%3D+125%0D%0A%3Cb%3EVariation%3C%2Fb%3E%0D%0AVariation+has+been+measured+throughout+the+planet+plus+the%0D%0Avalues+found+currently+have+been+plotted+on+charts.+Isogonic+lines+are+generally+printed+on+many+charts+used+inside+aerial+navigation+so+that%2C+in+case%0D%0Athe+actual+aircraft%E2%80%99s+approximate+position+is+known%2C+the+amount+of%0D%0Avariation+may+be+determined+by+visual+interpolation+between%0D%0Athe+particular+printed+lines.+At+very+high+altitudes%2C+many+of+these+values+is%0D%0Aconsidered+quite+realistic.+Conversely%2C+at+low+altitudes%2C+these%0D%0Amagnetic+values+happen+to+be+less+reliable+because+of+surrounding+anomalies.%0D%0AVariation+changes+slowly+over+a+period+of+years+plus+the+particular+yearly%0D%0Aamount+of+such+change+typically+is+printed+on+many+charts.+Variation%0D%0Ais+also+subject+to+small+diurnal+%28daily%29+changes+that+may%0D%0Amostly+be+neglected+within+air+navigation.%0D%0A%3Ca+href%3D%22http%3A%2F%2F1.bp.blogspot.com%2F-88vhXxG0lYs%2FTzkAP2cQoEI%2FAAAAAAAAAGE%2FdYJaiNJ0zqU%2Fs1600%2Fcompas3.JPG%22+imageanchor%3D%221%22+style%3D%22margin-left%3A+1em%3B+margin-right%3A+1em%3B+text-align%3A+center%3B%22%3E%3Cimg+border%3D%220%22+src%3D%22http%3A%2F%2F1.bp.blogspot.com%2F-88vhXxG0lYs%2FTzkAP2cQoEI%2FAAAAAAAAAGE%2FdYJaiNJ0zqU%2Fs1600%2Fcompas3.JPG%22+%2F%3E%3C%2Fa%3E+%0D%0A

Direction : basic instrument and Earth’s Magnetic Field

Direction
Basic Instruments
The particular navigator should currently have a fundamental background throughout
navigation to guarantee accurate positioning of the particular aircraft. Dead
reckoning (DR) procedures aided by basic instruments give
the actual navigator the tools to solve the actual three simple problems of
navigation: position of the particular aircraft, direction with destination,
not to mention time of arrival. Utilizing just a standard instrument, including the particular
compass and drift information, you can navigate directly to be able to
any kind of area within the world. Various fixing aids, such as celestial
not to mention radar, may greatly enhance the particular accuracy of simple DR
procedures. This particular chapter discusses the basic instruments utilized
for DR and in addition then critiques the mechanics of DR, plotting, wind
impact, and in addition desktop solutions.
Directional information needed in order to navigate is actually obtained by
use of the earth’s magnetic lines of force. A compass system
uses a device that detects and even converts the actual energy from these
lines of force to an indicator reading. The magnetic compass
operates independently of the actual aircraft electrical systems.
Later developed compass systems require electrical power
with convert many of these lines of force in order to an aircraft heading.
Earth’s Magnetic Field
The earth has some of the properties of a bar magnet;
having said that, its magnetic poles usually are not situated at the geographic
poles, nor tend to be the actual two magnetic poles situated exactly opposite
every other as on a straight bar. The particular north magnetic pole can be
found approximately at 73° N latitude as well as 100° W longitude
on Prince of Wales Island. The particular south magnetic pole is found
at 68° S latitude and in addition 144° E longitude on Antarctica.
The actual earth’s magnetic poles, like those of any magnet, could be
considered with be connected by a number of lines of force. These
lines result within the magnetic field that envelops the particular earth.
They are considered with be emanating within the south magnetic
pole not to mention terminating at the actual north magnetic pole. [Figure 3-1]
The particular force of the actual magnetic field of the earth is divided
into 2 components: the vertical as well as the horizontal. The actual
relative intensity of these two components varies over the particular
earth thus which, at the magnetic poles, the vertical component
is actually at maximum strength and even the horizontal component typically is
minimum strength. At approximately the actual midpoint between
the particular poles, the particular horizontal component typically is at maximum strength
plus the vertical component is actually at minimum strength. Only
the particular horizontal component is chosen as a directive force for a
magnetic compass. Consequently, a magnetic compass loses its
usefulness with regard to an area of weak horizontal force, including the
area around the magnetic poles. The vertical component
causes the end of the particular needle nearer to the particular magnetic pole with
tip as the particular pole is actually approached.  This particular departure
within the horizontal can be called magnetic dip.

Pilot student Frequently asked question

General
1. Q. Is it difficult to fly an aircraft?
A. No. It is not particularly difficult. As a beginning student pilot, you will
do most of the actual flying (handling the controls of the aircraft).
2. Q. When may I begin to fly?
A. Immediately. However, you will need to apply for certain certificates,
as described in this guide, in preparation for solo flight.
3. Q. Is flying safe?
A. A well-built and maintained aircraft, flown by a competent and prudent
pilot, makes flying as safe or safer than many other forms of transportation.
4. Q. If engine failure occurs, what will happen?
A. Modern aircraft engines are very reliable, and complete engine failure
is a rare occurrence. If the improbable does happen, you will not “fall out
of the sky.” Just do what the instructor had you practice during lessons—
select a good landing area and land.

Student Pilot Flight Training
1. Q. What are the eligibility requirements for a student pilot?
A. The specific aeronautical experience requirements are outlined in 14
CFR part 61. For the student pilot certificate requirements, refer to subpart
C section 83.
2. Q. Where can I obtain my ground and flight school training?
A. Most airport operators can furnish this information, or you may contact
the nearest FSDO.
3. Q. Is there a set number of flight instructional hours I will receive before
I solo?
A. No. The instructor will not allow you to solo until you have learned to
perform certain maneuvers. These maneuvers include safe takeoffs and
landings. You must be able to maintain positive control of the aircraft at
all times and to use good judgment.
4. Q. What should I know about Title 14 of the Code of Federal Regulations
(14 CFR) prior to my first solo?
A. Your flight instructor will determine that you are familiar with
appropriate portions of 14 CFR part 61, the general and visual flight rules
of 14 CFR part 91, and will administer and grade a presolo written test
prior to solo endorsement. The presolo written test will also include
questions on the flight characteristics and operational limitations of the
make and model aircraft to be flown.
5. Q. What does an appropriate logbook endorsement for solo mean?
A. It means a verification by an authorized flight instructor showing that
on the date specified, the student was given dual instruction and found
competent to make solo flights.

6. Q. When is the first solo endorsement required?
A. A student pilot must have a first solo endorsement dated within 90 days
prior to any solo flight.
7. Q. What is the difference between a recreational pilot certificate and a
private pilot certificate?
A. The recreational pilot has fewer privileges than the private pilot. The
holder of a recreational pilot certificate is allowed to fly an aircraft within
50 nautical miles from the airport where instruction was received and
cannot operate in airspace where communications with air traffic control
are required. Since qualification training in these areas is not required, a
person should be able to obtain a recreational pilot certificate in fewer
flight hours than required for a private pilot certificate. All privileges and
limitations of the recreational pilot certificate are listed in 14 CFR part
61, section 101.
8. Q. Where can I get information about the Sport Pilot Program?
A. Sport pilot enthusiasts may find information on the Regulatory Support
Division’s web site at http://www.faa.gov/about/office_org/headquarters_offices/
avs/offices/afs/afs600 in the Light Sport Aviation Branch’s (AFS-610) area.
9. Q. Does a student pilot automatically have the privilege of cross-country
flying after soloing?
A. No. An instructor must have reviewed the pilot’s preflight planning and
preparation for solo cross-country flight and determine that the flight can
be made safely under the known circumstances and conditions. The
instructor must endorse the student pilot’s logbook prior to each crosscountry
flight, stating the pilot is considered competent to make the flight.
Under certain conditions, an instructor may authorize repeated solo flights
over a given route.
10. Q. As a student pilot, am I permitted to carry passengers prior to receipt
of my recreational pilot certificate or private pilot certificate?
A. No.

11. Q. Must I have a Federal Communications Commission (FCC)
radiotelephone operator’s permit to operate an aircraft radio transmitter?
A. No.
12. Q. For the purpose of obtaining an additional certificate or rating, may
the holder of a recreational pilot certificate act as pilot in command on
flights: (1) between sunset and sunrise; and (2) in airspace which requires
communication with air traffic control?
A. Yes, provided an authorized flight instructor has given the recreational
pilot the required ground and flight training in these areas, and endorsed
the pilot’s logbook. The recreational pilot will be required to carry the
logbook with the required endorsements on such flights.
13.Q. How can the holder of a sport or recreational pilot certificate ensure
that no inadvertent entry is made into airspace requiring communication
with air traffic control?
A. The pilot must select readily identifiable landmarks that are well beyond
the boundaries of the airspace requiring communication with air traffic
control. During training, instruction in identification of airspace requiring
communication with air traffic control will be provided.

Wednesday, February 8, 2012

Flight Navigator : Time

Time
In celestial navigation, navigators determine the actual aircraft’s
position by observing the celestial bodies. The actual apparent
position of these bodies changes with time. Consequently,
determining the particular aircraft’s position relies on timing the particular
observation exactly. Time can be measured by the actual rotation of
the actual earth and in addition the particular resulting apparent motions of the particular celestial
bodies. This chapter considers a few different systems of
measurement, every with a special use. Prior to learning the
different kinds of time, it is very important to be able to recognize transit.
Notice with regard to picture below that the particular poles divide the actual observer’s meridian into halves.





 The particular observer’s position typically is throughout the upper
branch. The lower branch typically is the actual opposite half. Every day,
due to the actual earth’s rotation, each celestial human body transits
the actual upper not to mention lower branches of the actual observer’s meridian. The particular
at first kind of time presented here can be solar time.

Apparent Solar Time
The particular sun because it is seen throughout the sky can be called the particular true sun or simply
the apparent sun. Apparent solar time can be based upon the actual
movement of the sun as it crosses the particular sky. A sundial
accurately indicates apparent solar time. Apparent solar
time is not valuable, considering the particular apparent length of day varies
throughout the particular year. A timepiece would have in order to operate at
different speeds to be able to indicate correct apparent time. Though,
apparent time accurately indicates upper and lower transit.
Upper transit occurs at noon; apparent time plus lower transit
at midnight apparent time. Difficulties inside utilizing apparent time
led in order to the particular introduction of mean time.


Mean Solar Time
A mean day is an artificial unit of continual length, based
on the average of almost all apparent solar days over a period of
years. Time for a mean day is actually measured with reference with
a fictitious body, the particular mean sun, so tailored that its hour
circle moves westward at a continual rate along the celestial
equator. Time computed using the mean sun is actually called mean
solar time. The coordinates of celestial bodies within the Air
Almanac are really tabulated in mean solar time, creating it the time
of primary interest with navigators. The particular difference within length
between the particular apparent day (based upon the actual true sun) not to mention the particular
mean day (based upon the mean sun) is actually never because a lot because a
minute. The actual differences are generally cumulative, though, thus which the actual
imaginary mean sun precedes or alternatively follows the actual apparent sun by
approximately 15 minutes at certain occasions in the course of the actual year.
Greenwich Mean Time (GMT)
Greenwich Mean Time (GMT) typically is used for most celestial
computations. GMT typically is mean solar time measured within the
lower branch of the Greenwich meridian westward from
360° in order to the upper branch of the particular hour circle passing by
the particular mean sun.

 The particular mean sun transits the actual
Greenwich meridian’s lower branch at GMT 2400 (0000)
each day as well as the actual upper branch at GMT 1200. The actual meridian at
Greenwich is actually the particular logical selection for this reference, as it happens to be the actual
origin for the actual measurement of Greenwich hour angle (GHA)
and in addition the reckoning of longitude. Consequently, celestial
coordinates as well as additional information and facts tend to be tabulated within almanacs
with reference to be able to GMT. GMT typically is in addition generally known as Zulu or alternatively Z time.

Local Mean Time (LMT)
Really because GMT is mean solar time measured with reference
to the particular Greenwich meridian, neighborhood mean time (LMT) can be
mean solar time measured with reference in order to the actual observer’s
meridian. LMT is actually measured from the lower branch of the
observers meridian, westward by 360°, in order to the actual upper
branch of the particular hour circle passing through the particular mean sun.

 The particular mean sun transits the particular lower branch of
the particular observer’s meridian at LMT 0000 (2400) plus the upper
branch at LMT 1200. For an observer at the Greenwich
meridian, GMT is actually LMT. Navigators utilize LMT to be able to compute
local sunrise, sunset, twilight, moonrise, as well as moonset at
many latitudes along a given meridian.

Saturday, February 4, 2012

Aeronautical Charts

An aeronautical chart typically is a pictorial representation of a portion
of the actual earth’s surface upon which lines and in addition symbols within a
variety of colors represent qualities or details seen found on the
earth’s surface. With regard to addition to be able to ground image, numerous additional
symbols and notes tend to be added to indicate navigational aids
(NAVAID) not to mention data required for air navigation. Properly
utilized, a chart typically is a vital adjunct with navigation; improperly employed,
it can become a hazard. Without it, modern navigation would
never currently have reached its present state of development. Because
of their marvelous importance, the navigator should be thoroughly
familiar with the wide variety of aeronautical charts and even
recognize their many uses.
Lambert Conformal
Aeronautical charts are really produced on countless different types of
projections. Since the actual demand for wide array in charts is and so amazing
not to mention the actual properties of the actual projections fluctuate greatly, there is no
specific projection satisfying all the navigation requirements. The projection
which most almost answers all the of the navigator’s problems typically is
the Lambert conformal, not to mention this projection can be the it many
widely used for aeronautical charts. An aeronautical chart of
a couple projection and in addition scale is obtained for any kind of portion
of the particular earth.
Datums
Maps created by a given country traditionally make use of the particular datum
built by that country. There can be because lots of as a thousand
of these numerous datums used throughout the planet. Inherent
problems result from over a hundred countries utilizing widely
different methods and in addition standards to be able to measure coordinate
systems. When added to be able to the particular effects of local variations in
topography and in addition the gravity field, systems are really built which
differ substantially from each different. These individualized
datums tend to be classified because surrounding and / or territorial.
Scale
Obviously, charts are a lot smaller than the area they
represent. The ratio between any kind of provided unit of length on a
chart as well as the actual true distance it represents found on the earth typically is the
scale of the chart. The scale varies, and also could differ greatly from
1 part of the actual chart with an additional. Charts are generally prepared in order to various
scales for different purposes. If a chart is in order to show the actual whole
planet and yet not be too large, it should be drawn with little
scale. If a chart can be in order to show a lot detail, it should be drawn to
a large scale; then it shows a smaller area than does a chart
of the particular same size drawn to a small scale. Remember, large
area, small scale; small area, large scale.
Aeronautical Chart
The particular scale of a chart may be given by a simple statement, such
as 1 inch equals 10 miles. This particular means a distance of 10 miles
on the earth’s surface can be shown 1 inch long on the chart. On
aeronautical charts, the scale is actually indicated inside you of two ways:
representative fraction or alternatively graphic scale.

Aeronautical Information
With regard to the aeronautical category, coded chart symbols denote
airfields, radio aids with navigation, commercial broadcasting
stations, Air Defense Identification Zones (ADIZ),
compulsory corridors, restricted airspace, warning notes,
lines of magnetic variation, and also special navigational grids.
Certain aeronautical details is case to be able to frequent change.
For economy of production, charts are really retained throughout stock for
different periods of time. In order to keep the charts current, just the particular
stable kinds of information are really printed on navigation charts.
NGA produces and also distributes almost all aeronautical charts and in addition Flight
Details Publication (FLIP) documents. A summary of the particular
typical charts is in Figure 1-33. Requisitions will need to indicate
item identification and also terminology for every item requested
as listed within the catalog. List aeronautical charts by series with regard to
numerical and / or alphabetical sequence; list FLIP documents by
type (en route, planning, terminal), title, plus geographic area of
coverage. Contact NGA or perhaps its squadrons and also detachments for
technical assistance with regard to preparing statements of requirements.
Addresses are generally listed inside the NGA Catalog of Maps, Charts, not to mention
Connected Treatments.

Effect of Wind on Aircraft

Any vehicle traveling on the ground, such as an automobile,
moves with regard to the direction inside that it's steered and / or headed and in addition
is actually affected extremely little by wind. Having said that, an aircraft seldom
travels in exactly the particular direction in that it really is headed given that
of the wind impact.
Any free object within the air moves downwind with the speed
of the wind. This particular is only as true for an aircraft as it is for a
balloon. When an aircraft is actually flying within a 20-knot wind, the actual body of
air in that it happens to be flying moves 20 NM in 1 hour. Consequently,
the aircraft equally moves 20 NM downwind with regard to 1 hour. This
movement can be inside addition to be able to the actual forward movement of the particular
aircraft through the particular human body of air.

The actual path of an aircraft over the particular earth is actually determined by the actual
two unrelated factors shown within Figure 4-23:
1. The particular motion of the particular aircraft through the actual airmass, and in addition
2. The motion of the airmass across the earth’s surface.
The actual motion of the aircraft by the actual airmass is actually directly
forward with regard to response in order to the particular pull of the actual propellers or simply thrust of
the actual jet engines, and also its rate of movement from the particular airmass
typically is TAS. This motion takes destination inside the direction of true
heading (TH). This particular motion of the actual airmass across the particular earth’s
surface could be from any direction and even at any speed. The actual
measurement of its movement typically is generally known as wind not to mention is actually expressed
inside direction and even speed (wind vector (W/V)).

Friday, February 3, 2012

STRAIGHT AND LEVEL FLIGHT

It happens to be impossible to be able to emphasize too strongly the necessity
for forming correct habits throughout flying straight and also
level. All the other flight maneuvers are throughout essence a
deviation from this particular fundamental flight maneuver.
Many flight instructors and even students are generally prone in order to
believe which perfection throughout straight-and-level flight
may come of itself, nevertheless such typically is not the actual case. It is very not
uncommon to be able to find a pilot whose standard flying ability
consistently falls only brief of minimum expected
standards, and upon analyzing the particular reasons for the particular
shortcomings with discover that the particular cause can be the particular inability
to be able to fly straight not to mention level properly.
Straight-and-level flight can be flight within which a constant
heading and even altitude tend to be maintained. It really is accomplished
by creating immediate as well as measured corrections for deviations
within direction and even altitude from unintentional slight
turns, descents, plus climbs. Level flight, at initial, is a matter
of consciously fixing the actual relationship of the particular position of
some portion of the particular airplane, utilized as a reference point, with
the particular horizon. Throughout establishing the particular reference points, the
instructor should really region the airplane inside the desired position
as well as aid the student in selecting reference points. The particular
instructor should be aware that no 2 pilots see this relationship
exactly the actual same. The particular references can depend on
where the particular pilot typically is sitting, the actual pilot’s height (whether short
or perhaps tall), as well as the particular pilot’s lanner of sitting. It is, therefore,
significant that during the fixing of this relationship, the particular
pilot sit with regard to an usual manner; otherwise the points can not
be the actual same when the actual general position typically is resumed.
Inside learning to be able to control the actual airplane in level flight, it's
important which the student be taught with maintain a light
grip found on the flight controls, and that the control forces
desired be exerted lightly and really enough with provide
the desired result. The student could learn with associate
the particular apparent movement of the particular references with all the
forces that provide it. In this particular means, the actual student may
develop the ability with regulate the change desired in
the actual airplane’s attitude by the actual amount and also direction of
forces applied in order to the particular controls without the actual necessity of
referring to be able to instrument or simply outside references for each
minor correction.
The pitch attitude for level flight (constant altitude) can be
usually obtained by selecting several portion of the particular airplane’s
nose because a reference point, not to mention then keeping
that point inside a fixed position relative in order to the horizon.
Utilizing the particular principles of attitude flying,
that position will need to be cross-checked occasionally
against the altimeter with determine whether or not or simply not the
pitch attitude is actually correct. In the event that altitude is being gained or simply
lost, the particular pitch attitude need to be readjusted throughout relation
to the horizon as well as then the particular altimeter rechecked
in order to determine if perhaps altitude can be presently being maintained. The application of forward or simply back-elevator pressure is
employed in order to control this attitude.



The particular pitch information and facts obtained from the attitude indicator
also is going to demonstrate the particular position of the nose relative to be able to
the horizon plus will indicate whether elevator pressure
typically is essential with change the actual pitch attitude to be able to return to
level flight. Still, the primary reference source is
the actual natural horizon.
In almost all normal maneuvers, the particular expression “increase the pitch
attitude” implies raising the actual nose in relation in order to the particular horizon;
the term “decreasing the particular pitch attitude” means
lowering the nose.
Straight flight (laterally level flight) is actually accomplished
by visually checking the actual relationship of the airplane’s
wingtips with all the horizon. Both wingtips really should be
equidistant above or below the particular horizon (depending on
whether the particular airplane can be a high-wing and / or low-wing type),
not to mention any essential adjustments should be produced with
the particular ailerons, noting the particular relationship of control pressure
and even the airplane’s attitude. The particular student
really should understand that anytime the wings are really banked,
besides the fact that pretty slightly, the actual airplane is going to turn. The actual
objective of straight-and-level flight can be to be able to detect small
deviations from laterally level flight because soon as they
occur, necessitating only small corrections. Reference
in order to the actual heading indicator must be produced in order to note any kind of
change throughout direction.
STRAIGHT And In Addition LEVEL
Continually observing the wingtips has advantages
alternative than being the only positive check for leveling the
wings. It furthermore assists divert the particular pilot’s attention from the
airplane’s nose, prevents a fixed stare, plus automatically
expands the pilot’s area of vision by increasing the particular range
mandatory for the actual pilot’s vision to cover. In practicing
straight-and-level-flight, the actual wingtips is chosen not
only for establishing the particular airplane’s laterally level attitude
or bank, but yet to a lesser degree, its pitch attitude.
This particular is actually noted only for assistance with regard to learning straight-andlevel
flight, not to mention is actually not a recommended practice in usual
operations.
The particular scope of a student’s vision is as well extremely significant,
for in case it happens to be obscured the student might tend with look out to
you side continually (commonly the actual left) and in addition consequently
lean which means. This particular not only gives the particular student a biased
angle from which to be able to judge, but additionally causes the student
to be able to exert unconscious pressure on the controls in that
direction, that results within dragging a wing.
With the wings approximately level, it's quite possible to be able to
maintain straight flight by simply exerting the particular mandatory
forces on the rudder within the desired direction.
Even so, the instructor should point out that the particular
practice of utilizing rudder alone can be not correct and even will
make precise control of the particular airplane difficult.
Straight-and-level flight requires almost no application
of control pressures in the event that the airplane is actually correctly
trimmed and also the particular air is actually smooth. For which reason, the
student must not form the actual habit of regularly moving
the controls unnecessarily. The student should learn to
recognize when corrections tend to be essential, and even then in order to
make a measured response easily as well as naturally.
To be able to obtain the proper conception of the forces
required found on the rudder in the course of straight-and-levelflight,
the airplane should be held level. One of many
the majority of well-known faults of beginning students is the particular
tendency in order to concentrate on the nose of the airplane
not to mention attempting in order to hold the wings level by observing
the particular curvature of the actual nose cowling. With this particular method,
the particular reference line is actually very short not to mention the actual deviation,
particularly in the event that especially slight, will go unnoticed. Moreover, a
pretty small deviation from level, by this brief reference
line, becomes considerable at the particular wingtips and even
results throughout an appreciable dragging of one wing. This
attitude requires the use of more rudder with
maintain straight flight, providing a false conception of
neutral control forces. The habit of dragging you
wing, as well as compensating with rudder pressure, in case
permitted with develop is actually particularly hard in order to break, and also
if perhaps not corrected can result inside considerable difficulty
in mastering alternative flight maneuvers.
For almost all practical purposes, the actual airspeed is going to remain continual
within straight-and-level flight with a continual force
setting. Practice of intentional airspeed changes, by
increasing or alternatively decreasing the power, usually provide an
great means of developing proficiency throughout sustaining
straight-and-level flight at different speeds.

Substantial changes with regard to airspeed will, of course, require
considerable changes with regard to pitch attitude not to mention pitch trim with
maintain altitude. Pronounced changes inside pitch attitude
and even trim will additionally be mandatory as the actual flaps and even landing
gear tend to be operated.
Widespread errors within the performance of straight-andlevel
flight are:
• Attempting to employ improper reference points on
the particular airplane to establish attitude.
• Forgetting the actual location of preselected reference
points on subsequent flights.
• Attempting to be able to establish or simply correct airplane attitude
utilizing flight instruments somewhat than outside visual
reference.
• Attempting to maintain direction utilizing just rudder
control.
• Habitually flying with 1 wing low.
• “Chasing” the particular flight instruments somewhat than
adhering to the actual principles of attitude flying.
• Too tight a grip found on the flight controls resulting throughout
overcontrol and lack of feel.
• Pushing or alternatively pulling found on the flight controls quite
than exerting pressure against the particular airstream.
• Improper scanning and/or devoting insufficient
time with outside visual reference. (Head within the
cockpit.)
• Fixation on the nose (pitch attitude) reference
point.
• Unnecessary or simply inappropriate control inputs.
• Failing in order to create timely and measured control
inputs when deviations from straight-and-level
flight usually are detected.
• Inadequate attention with sensory inputs with regard to developing
feel for the actual airplane.

FEEL OF THE AIRPLANE

The actual  ability in order to sense a flight condition, without relying
on cockpit instrumentation, is actually often generally known as “feel of the actual
airplane,” yet senses with regard to addition in order to “feel” happen to be concerned.
Sounds inherent to flight are really an important sense throughout
developing “feel.” The actual air that rushes past the actual modern
light plane cockpit/cabin is actually frequently masked by
soundproofing, yet it can nevertheless be heard. When the actual
level of sound increases, it indicates that airspeed typically is
increasing. Also, the powerplant emits distinctive
sound patterns within different conditions of flight. The
sound of the actual engine in cruise flight will be different
from which inside a climb, and also different again from which inside
a dive. When force is employed within fixed-pitch propeller
airplanes, the actual loss of r.p.m. is actually particularly noticeable.
The actual amount of noise that is heard usually
depend on just how much the actual slipstream masks it out.
However, the particular relationship between slipstream noise as well as
powerplant noise aids the actual pilot with regard to estimating not
just the present airspeed yet the actual trend of the airspeed.
There happen to be 3 sources of actual “feel” that are fairly
significant to the actual pilot. It is actually the particular pilot’s own body because
it responds to forces of acceleration. The particular “G” loads
imposed found on the airframe tend to be as well felt by the actual pilot.
Centripetal accelerations force the pilot down into the actual
seat or raise the particular pilot against the seat belt. Radial
accelerations, because they produce slips or perhaps skids of the airframe,
shift the pilot from side to be able to side within the seat.
These forces need not be strong, just perceptible by
the particular pilot with be useful. An accomplished pilot who has
great “feel” for the particular airplane is going to be capable with detect
even the actual minutest change.
The response of the actual aileron and in addition rudder controls with the actual
pilot’s touch is a different element of “feel,” and is specific
which delivers direct details concerning airspeed.
Because previously stated, control surfaces move within the
airstream and also meet resistance proportional to be able to the
speed of the actual airstream. When the airstream is actually fast, the actual
controls are generally stiff and also hard in order to move. When the actual airstream
can be slow, the actual controls move conveniently, however must be deflected
a better distance. The pressure that should be exerted
found on the controls in order to effect a desired result, not to mention the actual lag
between their movement not to mention the particular response of the airplane,
becomes better because airspeed decreases.
A different kind of “feel” comes to the pilot through the particular
airframe. It consists mainly of vibration. An illustration
can be the particular aerodynamic buffeting as well as shaking which precedes
a stall.
Kinesthesia, or alternatively the sensing of changes within direction or
speed of motion, typically is one of several many important senses a
pilot can easily develop. When properly developed, kinesthesia
can certainly warn the particular pilot of changes with regard to speed and/or
the beginning of a settling and / or mushing of the airplane.
The actual senses which contribute in order to “feel” of the actual airplane usually are
inherent inside each and every person. But, “feel” must be
developed. The flight instructor should really direct the
beginning pilot with be attuned with these senses and even teach
an awareness of their meaning as it relates to numerous
conditions of flight. With do this effectively, the particular flight
instructor must fully understand the actual difference
between perceiving something not to mention merely noticing it.
It is actually a well established truth that the particular pilot who develops
a “feel” for the airplane early throughout flight training may
have little difficulty with advanced flight maneuvers.

Flight Planning

Within the air, right now there typically is little time for lengthy processes of
reasoning. Decisions should be created promptly and accurately;
therefore, cautious planning can be imperative in order to any kind of flight. A smooth,
lucrative flight requires a thoughtful step-by-step plan that can certainly
be followed from takeoff to be able to landing.
Route Determination
When planning a route to be flown, various factors enter into
consideration. The actual route can be dictated by operational
requirements of the flight; it could be a preplanned route, or simply
the navigator could have the particular prerogative of selecting the actual route
with be flown. Within any kind of case, definite factors affect route selection
not to mention the navigator must be aware of them.
Within the majority of situations, a direct route can be commonly right considering it
conserves both time plus fuel. Such details because airways, routing,
significant terrain, not to mention bad weather, nonetheless, can easily affect this particular. The particular
direction of prevailing winds may affect route selection,
considering the particular proper use of a jet stream often decreases total
flying time, despite that a direct route is actually not flown.
Chart Selection
Once a route can be established, navigation charts appropriate in order to
the actual intended flightpath really should be selected. Correct selection
depends on distance to be flown, airspeeds, methods of
navigation, and even chart accuracy.
Total Distance with Fly
A marvelous circle can be the actual shortest distance between 2 points.
Considerable distance is saved by flying an outstanding circle
course, particularly on long-range flights throughout polar latitudes.
A straight line on a gnomonic chart represents a wonderful circle
course. You technique to flight plan a fantastic circle course is to be able to plot
the actual entire route on a gnomonic chart, then transfer coordinates
to be able to charts more suitable for navigation, including a Transverse
Mercator. Select coordinates at intervals of approximately
300 nautical miles (NM). As soon as the actual route is actually plotted on the
navigational chart, record true guides and distances for every
leg of the actual flight on the flight plan.



Chart not to mention Techniques of Navigation
The actual method of navigation is determined by flight requirements
and even the actual route/area that can be utilized. Select charts for the actual flight which
are very best suited to be able to the navigational techniques chosen. For
example, radar flights require charts with representative
terrain plus cultural returns for precision fixing not to mention grid flights
require charts with a grid overlay.


Scale
The actual scale of charts used for navigation varies inversely with
the speed of the particular aircraft. For example, Jet Navigation Charts
(JNC) currently have a little scale and even contain qualities appropriate for
very high speed navigation. Navigation at slower speeds requires
large scale charts providing more detailed coverage.
NOTAMs
Interim aeronautical flight information changes happen to be
disseminated by NOTAMs until the change typically is provided throughout
almost all pertinent FLIPs. NOTAMs moreover provide the actual many current
info on restrictions to be able to flight, reliability of airport
facilities as well as services, en route hazards, radio aids, etc.

Air Traffic Control System (ATC)

The majority of nations of the actual planet these days have established airspace, air
traffic units, and also air traffic services in order to promote a safe, orderly,
plus expeditious flow of traffic. Furthermore, throughout the interest
of standardization, countless nations are establishing systems
according in order to the practices and suggested practices
adopted by the actual International Civil Aviation Organization
(ICAO). Navigators should recognize what these air traffic
services are generally and even how they is chosen.
• Air Traffic Service-a general term referring to any
of the actual following services:
• Air Traffic Control (ATC)-a service provided
by ground agencies to prevent collisions not to mention to
expedite and also maintain an orderly flow of traffic.
ATC includes such services as area and also en route
control, approach control, not to mention tower control. It happens to be
selected primarily below instrument flight rules (IFR).
• Advisory Service-provided with give air
details that is beneficial for the particular safe and even
efficient conduct of flight. This service typically is
generally associated with the visual flight rules
(VFR) environment and in addition involves such services
as weather conditions, location of acknowledged traffic,
status of navigational aids (NAVAID), and even status
of airports not to mention facilities.
• Alerting Service-a service provided with notify
applicable organizations regarding aircraft within
need of search and even rescue aid as well as in order to aid such
organizations because required.
• Airspace-when it has been determined that air
traffic services happen to be to be provided, portions of
the particular airspace usually are tailored within relation in order to the air
traffic services that happen to be needed. Consult Flight
Information Publication (FLIP) for an in-depth
explanation of airspace.
• Air Traffic Service Units-provide the actual air traffic
service within defined airspace.
• Air Route Traffic Control Centers (ARTCC)-
provides ATC in order to IFR flights within controlled
airspace.
• Approach Control-provides ATC to aircraft
arriving at or simply departing from it or alternatively more airports.
• Airport Control Tower-provides ATC service
for airport traffic.
• Flight Service Station (FSS)-operated by
the particular Federal Aviation Administration (FAA) to
provide flight assistance service.
• International Civil Aviation Organization
(ICAO)-establishes international rules for ATC,
the actual ICAO was formed throughout April 1947. ICAO is
affiliated with the United Nations because a specialized
international body dealing with aviation matters.
The actual member states (refer with flight info
publications (FLIP) General Planning (GP)) of the actual
ICAO) subscribe in order to ICAO rules not to mention procedures.
Many of these rules plus procedures are generally selected except for
national deviations, that are generally usually filed with
ICAO. Since standardization within ICAO is based
upon the actual same technical principles and also policies
that are in actual impact in the continental United
States (CONUS), American airmen could fly all the
major routes following the particular same general rules of
the air, and also governed by the actual same traffic control
service with that they are really familiar at house.
• Federal Aviation Administration (FAA)-
the actual United States typically is a member of ICAO plus
follows ICAO practices. Deviations from ICAO
standards happen to be filed with ICAO. The particular FAA can be
responsible for air traffic services within the United
States and also its possessions according in order to the particular Federal
Aviation Act of 1958, which consolidated all air
traffic regulatory agencies underneath the control of
the FAA. Some of the responsibilities of the particular FAA
include:
1. Operates the ATC system within the actual United
States airspace.
2. Establishes and also ensures compliance with
Title 14 of the actual Code of Federal Regulations
(14 CFR), that typically is binding found on the entire
aviation community.
3. Issues certificates in order to aircrew members,
maintenance personnel, not to mention control tower
operators.
4. Investigates aircraft accidents.
5. Maintains communication stations and
conducts flight checks on NAVAIDs.

The Earth : map and chart

Shape and also Size
For the majority of navigational reasons, the earth is assumed in order to
be an ideal sphere, although within reality it is not. Inspection
of the actual earth’s crust reveals there typically is a height variation of
approximately 12 miles within the top of the actual tallest mountain
with the bottom of the actual deepest point within the ocean. A more
significant deviation from round can be caused by a combination of
the actual earth’s rotation and even its structural flexibility. When taking
the particular ellipsoidal shape of the planet into account, mountains
seem quite insignificant. The actual peaks of the particular Andes are really much
farther from the center of the actual earth than Mount Everest.
Measured at the particular equator, the actual earth can be approximately 6,378,137
meters with regard to diameter, while the actual polar diameter is approximately
6,356,752.3142 meters. The difference with regard to these diameters
is actually 21,384.6858 meters, plus this particular difference will be chosen to
express the actual ellipticity of the actual earth. The actual ratio between this
difference and also the actual equatorial diameter is:
Ellipticity = 21,384.6858  =          1
                    6 378,137        298.257223
Since the actual equatorial diameter exceeds the polar diameter by
just 1 part throughout 298, the earth typically is nearly spherical. A symmetrical
human body having the actual same dimensions because the earth, however, with
a smooth surface, can be called an ellipsoid. The particular ellipsoid is
sometimes described because a spheroid, or an oblate spheroid.
 polar north (Pn), east (E), polar south (Ps),
and west (W) represent the particular surface of the earth. Pn and in addition Ps
represent the axis of rotation. The earth rotates from west in order to
east. All the points with regard to the hemisphere Pn, W, Ps approach the particular
reader, whilst those with regard to the opposite hemisphere recede from
the particular reader. The actual circumference W-E can be generally known as the actual equator,
that is actually defined because which imaginary circle found on the surface of
the actual earth whose plane passes from the particular center of the actual earth
not to mention typically is perpendicular to be able to the actual axis of rotation.
Great Circles and also Little Circles
A fantastic circle typically is defined as a circle on the surface of a sphere
whose center and also radius usually are those of the sphere itself. It's
the largest circle that can certainly be drawn found on the sphere; it happens to be the actual
intersection with the surface of the particular earth of any plane passing
through the earth’s center. The particular arc of a terrific circle is actually the particular
shortest distance between two points on a sphere, just as a
straight line is actually the particular shortest distance between two points on a
plane.





On any sphere, an indefinitely large number of awesome circles may be drawn by any kind of point, an indefinitely large number of great circle may be drawn through any kind of 2 points not diametrically opposite.
Circles on the surface of the particular sphere, different than good circles, could be defined because little circles. A little circle can be a circle on the particular surface of the actual earth whose center and/or radius are not which of the particular sphere. A set of small circles, generally known as latitude, is actually
discussed later. In summary, the intersection of a sphere as well as a plane is an ideal circle generally if the plane passes from the center of the particular sphere not to mention a small circle when it does not.


Latitude and Longitude
The particular nature of a sphere is such that any point on it is exactly
like any different point. There is actually neither beginning nor ending
as far because differentiation of points can be concerned. Inside order which
points might be found found on the earth, some points or simply lines of
reference tend to be required thus that additional points could be located
with regard in order to them. The actual location of Raw York City with
reference in order to Washington, D.C. can be reported as a number of
miles throughout a certain direction from Washington. Any point on
the earth is found throughout this manner.

Imaginary Reference Lines
Such a system, still, does not lend itself readily to
navigation, because it would be difficult with locate a point
precisely with regard to mid-ocean without any nearby geographic
qualities with use for reference. We all use a system of coordinates
to be able to locate positions found on the earth by means of imaginary
reference lines. Many of these lines are generally well-known as parallels of latitude
and also meridians of longitude.
Latitude
As soon as a day, the earth rotates on its north-south axis, which
can be terminated by the actual 2 poles. The equatorial plane can be
constructed at the midpoint of this axis at right angles in order to it.
[Figure 1-3] An amazing circle drawn through the particular poles typically is called
a meridian, and even an infinite number of really good circles will be
constructed in this particular manner. Every meridian can be divided into four
quadrants by the particular equator not to mention the actual poles. The circle can be arbitrarily
divided into 360°, not to mention each of these quadrants contains 90°.
Longitude
The particular latitude of a point could be shown as 20° N or perhaps 20° S of the
equator, yet right now there can be no means of understanding whether or not specific point is actually
east or west of another. This particular difficulty is actually resolved by utilize of the actual
additional component of the actual coordinate system, longitude, which
is the particular measurement of this particular east-west distance. Longitude,
unlike latitude, has no natural starting point for numbering.
The particular solution has been in order to select an arbitrary starting point.
A wonderful several places currently have been selected, yet when the actual Englishspeaking
people began in order to create charts, they chose the actual
meridian through their principal observatory within Greenwich,
England, as the origin for counting longitude. This particular Greenwich
meridian typically is sometimes generally known as the actual prime meridian, though
actually it's the particular zero meridian. Longitude typically is counted east plus
west from this meridian through 180°. [Figure 1-5] Thereby,
the actual Greenwich meridian typically is the actual 0° longitude on 1 side of
the earth not to mention, after crossing the particular poles, it becomes the particular 180th
meridian (180° east and / or west of the 0° meridian).
Within summary, when a globe has the circles of latitude and also longitude
drawn upon it according with the principles described, any
point could be located found on the globe utilizing these measurements.







Distance
Distance, because previously defined, can be measured by the length of
a line joining two points. The actual standard unit of distance for
navigathon is actually the actual nautical mile (NM). The particular NM is defined
because either 6,076 feet or perhaps 1 minute of latitude. Sometimes it
is essential to be able to convert statute miles (SM) to be able to NM and vice
versa. This particular conversion is actually conveniently completed with the following ratio:

Number of statute miles   =  76
Number of nautical miles      66
Direction
Remember, direction can be the actual position of you point throughout space
relative to be able to a different without reference to be able to the distance between
them. The particular time honored point system for specifying a
direction because north, north-northwest, northwest, westnorthwest,
west, etc., is actually not adequate for modern navigation.
It has been replaced for the majority of reasons by a numerical system.
The actual numerical system divides the horizon into
360°, starting with north as 000° and continuing clockwise
by east 090°, south 180°, west 270°, and also back to be able to north.

Great Circle and even Rhumb Line Direction
The actual direction of the amazing circle, shown throughout Figure 1-10, makes
an angle of regarding 40° with the meridian near Washington,
D.C., about 85° with all the meridian near Iceland, and also a still
better angle with the meridian near Moscow. Easily put,
the particular direction of the superb circle can be consistently changing as
progress is actually prepared along the actual route and also can be different at each and every
point along the actual really good circle. Flying such a route requires
constant change of direction and in addition would be difficult with fly
below ordinary conditions. Still, it's the particular many desirable route
because it is the shortest distance between any kind of two points.
A line that makes the actual same angle with every meridian typically is generally known as
a rhumb line. An aircraft carrying a constant true heading
would be flying a rhumb line. Flying this particular sort of path results
inside a better distance traveled, yet it really is easier to steer. In the event that
continued, a rhumb line spirals toward the actual poles in a continual
true direction however, never reaches them. The actual spiral formed typically is
called a loxodrome or perhaps loxodromic curve. Between 2 points on the earth, the fantastic circle is actually shorter
than the rhumb line, however the actual difference typically is negligible for brief
distances (except inside excellent latitudes) or simply in the event that line approximates
a meridian or perhaps the actual equator.

Thursday, February 2, 2012

Basic Flight Navigator : The Earth

Shape and also Size
For the majority of navigational purposes, the world can be assumed to
be a perfect sphere, even though in reality it's certainly not. Inspection
of the world s crust reveals there can be a height variation of
approximately 12 miles within the top associated with the tallest mountain
with the particular bottom associated with the deepest point in the ocean. A more
noticeable deviation from round typically is brought about by a mixture of
the actual earth s rotation and also its structural flexibility. Whenever taking
the particular ellipsoidal shape associated with the planet into account, mountains
appear very insignificant. The peaks associated with the Andes usually are much
farther within the center associated with the earth compared to Mount Everest.
Measured at the equator, the actual world can be around 6,378,137
meters in diameter, while the polar diameter is approximately
6,356,752.3142 meters. The particular difference with regard to many of these diameters
typically is 21,384.6858 meters, and this particular difference may be employed to
express the ellipticity of the world. The ratio between this particular
difference plus the equatorial diameter is:
Ellipticity = 21,384.6858 = 1
6 378,137 298.257223
Since the actual equatorial diameter exceeds the polar diameter by
only 1 part throughout 298, the world is actually almost spherical. A symmetrical
human body having the particular exact same dimensions because the world, however alongside
a smooth surface, is known as a great ellipsoid. The actual ellipsoid can be
at times described as a spheroid, or perhaps a particular oblate spheroid.
In Figure 1-1, polar north (Pn), east (E), polar south (Ps),
not to mention west (W) represent the actual surface associated with the earth. Pn and in addition Ps
represent the actual axis of rotation. The particular world rotates from west to
east. Almost all points within the hemisphere Pn, W, Ps approach the
reader, whilst those within the opposite hemisphere recede from
the actual reader. The actual circumference W-E typically is called the equator,
that is defined as that imaginary circle found on the surface of
the particular earth whose plane passes through the actual center of the earth
as well as is actually perpendicular to be able to the axis of rotation.
Great Circles and even Small Circles
A superb circle can be defined as a circle on the surface of the sphere
whose center and also radius happen to be those associated with the sphere itself. It is actually
the actual biggest circle that may be drawn found on the sphere; it's the particular
intersection with all the surface of the earth of any plane passing
through the world s center. The particular arc of the awesome circle typically is the actual
shortest distance between two points about a sphere, just because a
straight line can be the particular shortest distance between couple points on a
airplane. About any sphere, an indefinitely large amount of great

EFFECTS AND USE OF THE CONTROLS

Inside explaining the functions of the actual controls, the instructor
need to emphasize which the particular controls never change inside the
results produced within relation to the actual pilot. The actual pilot should
usually be considered the center of movement of the particular airplane,
or the reference point from that the movements
of the actual airplane usually are judged plus described. The particular following
might always be true, regardless of the actual airplane’s attitude
with regard to relation to the Earth.
• When back pressure typically is applied with the actual elevator control,
the particular airplane’s nose rises inside relation to be able to the particular pilot.
• When forward pressure typically is applied with the particular elevator
control, the actual airplane’s nose lowers with regard to relation in order to the particular
pilot.
• When proper pressure can be applied in order to the aileron control,
the actual airplane’s proper wing lowers with regard to relation with
the pilot.
• When left pressure can be applied to be able to the aileron control,
the actual airplane’s left wing lowers inside relation to the particular
pilot.
• When pressure typically is applied to the right rudder pedal,
the actual airplane’s nose moves (yaws) to the particular right inside
relation to be able to the particular pilot.
• When pressure is actually applied in order to the particular left rudder pedal,
the particular airplane’s nose moves (yaws) to the particular left inside
relation in order to the particular pilot.
The preceding explanations really should avoid the actual
beginning pilot from thinking inside terms of “up” or
“down” in respect to the Earth, that is only a relative
state to the actual pilot. It can in addition make understanding of the actual
functions of the controls a lot simpler, particularly
when operating steep banked turns and also the particular more
advanced maneuvers. Consequently, the particular pilot should be
able with correctly determine the actual control application
required with area the airplane within any attitude or perhaps flight
condition which typically is desired.

The actual flight instructor should explain which the particular controls
will have a purely natural “reside pressure” while with regard to flight as well as
which they may remain within neutral position of their own
accord, if perhaps the airplane typically is trimmed correctly.
With this particular throughout mind, the actual pilot ought to be cautioned
never in order to think of movement of the controls, yet of
exerting a force on them against this particular reside pressure or perhaps
resistance. Movement of the particular controls could not be
emphasized; it is the duration as well as amount of the
force exerted on them which effects the actual displacement
of the particular control surfaces and maneuvers the airplane.
The actual amount of force the airflow exerts on a control
surface is actually governed by the airspeed and even the actual degree which
the surface can be moved out of its neutral and / or streamlined
position. Since the particular airspeed can not be the same with regard to all
maneuvers, the actual amount the particular control surfaces are really
moved can be of little importance; but it really is significant which
the particular pilot maneuver the airplane by applying sufficient
control pressure to obtain a desired result, regardless
of how far the actual control surfaces are really actually moved.
The controls ought to be held lightly, with the fingers,
not grabbed and also squeezed. Pressure will need to be exerted
found on the control yoke with all the fingers. A widespread error
with regard to beginning pilots is actually a tendency in order to “choke the stick.”
This particular tendency really should be avoided because it prevents the particular
development of “feel,” that is actually a significant part of
aircraft control.

The pilot’s feet could rest comfortably against the particular
rudder pedals. Both heels must support the weight
of the particular feet found on the cockpit floor with all the ball of every
foot touching the individual rudder pedals. The particular legs
and in addition feet should not be tense; they must be relaxed
simply just because when driving an automobile.

When using the actual rudder pedals, pressure should be
applied smoothly not to mention evenly by pressing with all the ball
of it foot. Since the actual rudder pedals usually are interconnected,
as well as act within opposite directions, when pressure is applied
to you pedal, pressure found on the additional should be relaxed proportionately.
When the actual rudder pedal must be moved
significantly, heavy pressure changes should really be created
by applying the pressure with the ball of the actual foot while
the particular heels slide along the cockpit floor. Remember, the actual
ball of each foot must rest comfortably found on the rudder
pedals and so which even slight pressure changes is felt.

With regard to summary, in the course of flight, it is very the pressure the actual pilot
exerts on the control yoke as well as rudder pedals that
causes the actual airplane in order to move about its axes. When a
control surface typically is moved out of its streamlined position
(even slightly), the actual air flowing past it will exert a force
against it as well as can try to be able to return it to be able to its streamlined position.
It happens to be this force which the actual pilot feels because pressure on
the control yoke and even the actual rudder pedals.

After Landing, Clear of runway and Parking

AFTER LANDING
Throughout the actual after-landing roll, the airplane need to be
gradually slowed with usual taxi speed prior to turning
off the actual landing runway. Any noticeable degree of turn
at faster speeds may result with regard to ground looping plus
subsequent damage to be able to the airplane.
To be able to give full attention to controlling the airplane for the duration of
the particular landing roll, the actual after-landing check need to be
performed just after the particular airplane typically is brought in order to a
complete stop clear of the active runway. There have
been countless cases of the pilot mistakenly grasping the actual
wrong handle and retracting the actual landing gear, rather
of the actual flaps, due in order to improper division of attention while
the airplane was moving. Even so, this particular procedure may
be modified generally if the manufacturer recommends which
specific after-landing products be accomplished in the course of
landing rollout. For example, when operating a
short-field landing, the manufacturer might recommend
retracting the particular flaps on rollout to be able to enhance braking. Throughout
this particular situation, the particular pilot ought to make a positive
identification of the flap control and even retract the actual flaps.
CLEAR OF RUNWAY
As a result of different features and equipment in different
airplanes, the particular after-landing checklist provided by the
manufacturer really should be chosen. Several of the particular goods can
include:
• Flaps . . . . . . . . . . . . . . . Identify and even retract
• Cowl flaps . . . . . . . . . . . . . . . . . . . . . Open
�$80� Propeller control . . . . . . . . . . . Full increase
• Trim tabs . . . . . . . . . . . . . . . . . . . . . . . . Set
PARKING
Unless parking throughout a designated, supervised area, the actual
pilot will need to select a location as well as heading that is going to
prevent the particular propeller or jet blast of other airplanes from
striking the particular airplane broadside. Whenever possible, the actual
airplane will need to be parked headed into the particular existing or simply
forecast wind. After stopping on the desired heading,
the airplane could be allowed to be able to roll straight ahead
enough to be able to straighten the actual nosewheel or simply tailwheel.

BEFORE TAKEOFF CHECK

The actual prior to takeoff check can be the systematic procedure
for making a check of the particular engine, controls, systems,
instruments, and also avionics prior with flight. Normally, it is
performed after taxiing to a position near the takeoff
end of the actual runway. Taxiing to be able to that position commonly
allows sufficient time for the actual engine in order to warm about at
least minimum operating temperatures. This ensures
adequate lubrication and internal engine clearances
before being operated at significant power settings. Various
engines require which the actual oil temperature reach a
minimum value as reported within the AFM/POH prior to significant
power is applied.
Air-cooled engines mostly tend to be closely cowled not to mention
equipped with pressure baffles which direct the particular flow of
air with the actual engine inside sufficient quantities for cooling with regard to
flight. On the ground, nonetheless, a lot less air can be forced
through the actual cowling and even about the particular baffling.
Prolonged ground operations will cause cylinder
overheating long before right now there can be an indication of rising
oil temperature. Cowl flaps, when accessible, should be set
according to the particular AFM/POH.
Before beginning the before takeoff check, the actual airplane
must be positioned well-defined of additional aircraft. Right now there
should not be anything behind the actual airplane that may well
be damaged by the particular prop blast. With minimize
overheating throughout engine runup, it really is recommended
that the particular airplane be headed as almost because quite possible into
the wind. After the airplane is actually correctly positioned for
the runup, it will need to be enabled in order to roll forward slightly
thus which the actual nosewheel or alternatively tailwheel is going to be aligned fore
and aft.
In the course of the engine runup, the particular surface underneath the airplane
must be firm (a smooth, paved, or perhaps turf surface in the event that
possible) and free of debris. Otherwise, the actual propeller
can pick up pebbles, dirt, mud, sand, or simply additional loose
objects not to mention hurl them backwards. This damages the actual
propeller and in addition will damage the actual tail of the airplane.
Small chips within the leading edge of the propeller shape
stress risers, or lines of concentrated excellent stress. Many of these
happen to be highly undesirable and in addition may lead in order to cracks and also
quite possible propeller blade failing.
Whilst operating the actual engine runup, the pilot must
divide attention inside plus outside the particular airplane. If the
parking brake slips, or simply if application of the particular toe brakes
typically is inadequate for the actual amount of power applied, the particular
airplane can move forward unnoticed if attention typically is
fixed inside the particular airplane.
Every airplane has different qualities and in addition equipment,
and even the before takeoff checklist provided by the actual
airplane manufacturer and / or operator should really be employed in order to
perform the particular runup.

COCKPIT MANAGEMENT

After entering the particular airplane, the particular pilot could initially confirm
which almost all mandatory equipment, documents, checklists,
plus navigation charts appropriate for the actual flight usually are on
board. If perhaps a portable intercom, headsets, and / or a hand-held
global positioning system (GPS) is actually selected, the particular pilot is actually
responsible for ensuring which the particular routing of wires and
cables does not interfere with all the motion and / or the
operation of any control.
Regardless of just what contents happen to be to be utilized, they
really should be neatly arranged as well as organized within a manner
that makes them readily available. The particular cockpit and also
cabin need to be checked for articles which could very well be
tossed regarding when turbulence is encountered. Loose items
ought to be properly secured. Just about all pilots ought to form the actual
habit of superior housekeeping.
The pilot must be able in order to see inside and outside
references. Generally if the range of motion of an adjustable seat
is actually inadequate, cushions really should be used to be able to provide the actual
proper seating position.
When the pilot is comfortably seated, the actual safety belt
plus shoulder harness (in case installed) will need to be fastened
and adjusted to be able to a comfortably snug fit. The actual shoulder
harness must be worn at least for the actual takeoff as well as
landing, unless the actual pilot cannot reach or perhaps operate the actual
controls with it fastened. The safety belt should be worn
at all instances when the pilot typically is seated at the actual controls.
In the event that seats are really adjustable, it happens to be significant to guarantee that
the particular seat can be locked with regard to position. Accidents currently have occurred
as the particular result of seat movement during acceleration and / or
pitch attitude changes throughout takeoffs and / or landings.
When the particular seat suddenly moves too close or too far
away from the controls, the pilot might be unable with
maintain control of the airplane.
14 CFR part 91 requires the actual pilot to confirm which each
person on board is briefed on how to be able to fasten and in addition
unfasten his/her safety belt plus, when installed, shoulder
harness. This ought to be accomplished prior to starting
the engine, along with a passenger briefing found on the
proper use of protection equipment and also exit information.
Airplane manufacturers have printed briefing cards
for sale, similar with those used by airlines, with
supplement the pilot’s briefing.

STUDENT PILOT GUIDE

Before we begin flight exercising, it is very important to have a basic understanding
of the responsibilities, safety regulations, plus issues applicable to be able to such an
endeavor. This involves the particular choice of a flight school, selected study
components, study habits, and the particular role of the particular instructor, student, not to mention Federal
Aviation Administration (FAA).
Role of the actual FAA
Congress empowered the actual FAA with foster aviation safety by prescribing protection
guidelines for civil aviation. This typically is accomplished from the Code of
Federal Regulations (CFRs).
Title 14 of the actual Code of Federal Regulations (14 CFR) part 61 pertains to be able to
the certification of pilots, flight instructors, plus ground instructors. This particular
prescribes the eligibility, aeronautical knowledge, flight proficiency, and in addition
experience required for each sort of pilot certificate issued.
Flight Standards District Offices (FSDOs)
Throughout the actual globe, the particular FAA has approximately 100 Flight Guidelines
District Offices plus International Field Offices, commonly referred to be able to as
“FSDOs” not to mention “IFOs.” By many of these offices, information and facts and also services happen to be provided for the particular aviation community. Within the U.S., FSDO phone numbers
are really listed within the blue pages of the actual telephone directory beneath United States
Government Offices, Department of Transportation, Federal Aviation
Administration. Another advantageous method is using the particular FSDO Locator
that you can buy on the Regulatory Support Division’s web website.
Selecting a Flight School
Many airports currently have facilities for flight training conducted by flight schools
or alternatively individual flight instructors. A school will certainly generally provide a wide variety
of training material, specialized facilities, and better flexibility throughout scheduling.
Many colleges and also universities as well provide flight training because a part of
their curricula.
Right now there are two types of flight schools catering to primary general aviation
requires. You can be normally referred to be able to as a certificated “part 141 school” not to mention
the particular additional as a “part 61 school.” A part 141 school has been granted an Air
Agency Certificate by the particular FAA. The particular certificated schools could qualify for a
ground school rating and even a flight school rating. In addition, the actual school can
be authorized to give their graduates useful (flight) tests not to mention knowledge
(pc administered written) tests. AC 140-2HH, FAA Certificated Pilot
Schools Directory, lists certificated ground and even flight schools and in addition the pilot
training guides every school offers. For ordering details, refer with the particular
Just how with Obtain Study Components section on page 6 of this particular guide. Another
convenient method can be through the actual Web at the FAA’s Regulatory and
Guidance Library web site.
http://www.airweb.faa.gov/Regulatory_and_Guidance_Library/rgAdvisoryCircular.nsf/

A choice of a flight school could depend on whether we are planning
to obtain a sport pilot certificate, recreational pilot certificate, private pilot
certificate, or simply whether or not we intend to be able to pursue a career as a professional pilot.
Yet another consideration can be whether or not you can train part time or simply full time.

Medical Requirements
Pilots, except those who fly gliders or simply free air balloons, should possess a
valid medical certificate within order with exercise the privileges of their airman
certificates. Sport pilots must possess either a valid third-class medical
certificate or simply a valid driver’s license.
The actual periodic medical examination required for medical certification typically is
conducted by designated aviation medical examiners, who are generally physicians
with a specialized interest within aviation protection and also have training within aviation
medicine.
The practices for medical certification tend to be contained with regard to 14 CFR part 67.
The requirements for obtaining medical certification usually are contained in 14
CFR part 61.
Prior in order to beginning flight practice, a flight instructor ought to interview a person
about any kind of wellness conditions and determine the goal as a pilot. Good advice
would be with obtain the particular class of medical certificate required, for the particular certificate
level you ultimately desire, prior to beginning flight exercising. Acquiring out
instantly whether you tend to be medically qualified could save time and even
money.
Knowledge Tests
Correspondence between individuals by the utilize of words can be a
complicated procedure. Within addition to being an exercise within the application
as well as utilize of aeronautical knowledge, a knowledge test is as well an exercise in
communication since it involves the actual use of created language. Since the particular
tests involve written quite than spoken words, communication between
the particular test writer and even the particular person being tested can become a difficult matter if
both parties never exercise care. For this reason, considerable effort is
expended in order to write each question inside a well-defined, precise manner.
Preparing in order to Study for the particular Knowledge Test
A instructor is going to direct anyone to be able to the particular textbooks as well as alternative sources of exercising
not to mention testing components which happen to be on the market from the Superintendent of
Documents, U.S. Government Printing Office, as well as the Regulatory Support
Division’s web website.
Study Habits
The employ of a preparing syllabus typically is a powerful means for the particular flight instructor to
lead anyone through the proper procedures inside learning to be able to fly safely.
When beginning flight training, the development of advantageous study habits
includes the practice of visualizing the flight instructor’s explanation plus
those of the particular textbook.
Study habits need to include time spent with cockpit familiarization. This
consists of reviewing checklists, identifying controls, and also learning the particular cockpit
arrangement.
When to Take the actual Knowledge Test
Experience has shown which the actual knowledge test is actually more meaningful to be able to the actual
applicant, plus is more likely to be able to result throughout a satisfactory grade, if it happens to be taken
after beginning the particular flight portion of the actual training. For optimum benefit, it is very
recommended that the actual knowledge test be taken after the particular student has
completed a solo cross-country flight. The actual operational knowledge gained
by this experience is used in order to the student’s advantage in the knowledge
test. Your own instructor is going to be the actual right indicator of your individual preparedness for the particular
test.
Where to be able to Take the actual Knowledge Test
FAA-Designated Computer Testing Centers have been certificated in order to
administer FAA knowledge tests. Applicants will certainly be charged a fee for the particular
administration of FAA knowledge tests. Test registration numbers and even a
complete list of test centers is downloaded within the Regulatory Support
Division’s web website.
http://www.faa.gov/about/office_org/headquarters_offices/avs/offices/afs/afs6008

The Knowledge Test Content not to mention Structure
The particular knowledge test contains questions of the particular objective, multiple-choice
type. This particular testing method conserves the particular applicant’s time, eliminates any
element of individual judgment with regard to determining grades, and saves time throughout
scoring.
Useful Test Standards
The particular flight proficiency maneuvers listed with regard to 14 CFR part 61 are really the standard
skill requirements for certification. They happen to be outlined within the useful test
standards (PTSs) because “AREAS OF OPERATION.” Many of these AREAS OF
OPERATION are phases of the particular practical test arranged throughout a logical sequence
within the particular standard. They begin with “Preflight Preparation” plus end with
“Postflight Procedures.” Roman numerals preceding every AREA OF
OPERATION relate to be able to the corresponding REGIONS OF OPERATION
contained in the regulation.
Every AREA OF OPERATION contains “Jobs,” which tend to be comprised of
knowledge regions, flight procedures, and/or flight maneuvers appropriate
to the actual AREA OF OPERATION. We happen to be required with demonstrate knowledge
and proficiency within Almost All TASKs for the actual original-issuance of almost all pilot
certificates.
A person need to obtain a copy of the practical test standard appropriate with the
pilot certificate which you plan to be able to acquire. This particular will enable you to recognize
exactly precisely what is expected on the practical test. Useful test standards can
be obtained from the Regulatory Support Division’s web website.
http://www.faa.gov/abott/office_org/headquarters_offices/avs/offices/afs/afs600