Fundamentals of Flight: Field Manual FM Department of the Army. Published by Dept. of the Army Washington, DC (). Used. Quantity Available. This is the current official army U.S. Army Field Manual, unchanged since this edition completed 7th May Field manual (FM) presents information. Headquarters, Department of the Army Field Manual . *This publication supersedes FM , 23 February ; FM , 03 October.

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A horizon disk is attached to the gimbals, which keeps the horizon disk in the same plane as the gyro while the aircraft pitches and rolls.

A preflight check to determine the condition of an altimeter consists of setting the altimeter pointer to the airport elevation or actual aircraft location altitude, if known, and noting the Kollsman window setting. As the sweep second hand of the clock passes a cardinal point 12, 3, 6, or 9check the heading on the heading indicator. Attitude indicators are free from most errors, but depending upon the speed with which the erection system functions, there may be a slight nose-up indication during a rapid acceleration and a nose-down indication during a rapid deceleration.

Fixations are likely during trim changes, attitude changes, gear and flap retractions, and power changes; after checking an instrument or applying a control, continue the cross-check and note the effect of the control during the next cross-check sequence.

Furthermore, the AIM contains some techniques and procedures not consistent with Army mission requirements, regulatory guidance, waivers, exemptions, and accepted techniques and procedures. The yawing effect is most pronounced in single-rotor helicopters and is absent in counterrotating helicopters.

The IVSI should not be used for directly controlling vertical speed when the aircraft is rapidly banking in excess of 40 degrees.

The pitch attitude of an airplane is the angle between the longitudinal axis of the airplane and the actual horizon. Horizontal situation indicator Attitude control is stressed in terms of pitch figurepagebank figurepagepower, and trim. The airspeed indicator is the primary pitch instrument and is adjusted to recommended autorotation speed. The addition of the altimeter to the attitude indicator in cross-check assists in recognizing rate of movement of the altimeter needle. The rate of rollout is the same used when rolling into the turn.


Army Field Manual FM 1-203, Fundamentals Of Flight

An encoding altimeter is also known as an AIMS altimeter. Thus, if the needle is displaced to the left, the helicopter is turning left; bringing the needle back to vertical position with the cyclic produces straight flight. Incorrect seat or rudder pedal adjustment, with feet in an uncomfortable position, often causes inadvertent application of brakes and excessive heading changes. This precession error can be immediately detected by closely cross-checking other bank instruments.

The remote compass transmitter is connected electrically to the RMI. Remote indicating compasses were developed to compensate for errors in manuxl limitations of older types of heading indicators.

United States Army Field Manuals

Immediate transition FM The range of the scale is from In addition, f information may be used by the FMC to calculate and update fuel consumption and specific range. Fundamentals of Helicopter Dynamics pdf by C. When the aircraft is flying straight-and-level, no inertia is acting on the ball, and the ball remains in the center of the tube between two wires. The horizontal situation indicator HSI is a direction indicator that uses the msnual from a flux valve to drive the dial, which acts as the compass card.

In other words, the aviator must steer degrees magnetic to fly over a true heading of degrees.

These inherent errors are small and correct themselves quickly after the aircraft returns to straight-and-level flight. A knob at the bottom center of the instrument case raises or lowers the aircraft to compensate for pitch trim changes as airspeed changes.


The float and card assembly has a hardened steel pivot in its center that rides inside a special, spring-loaded, hard-glass jewel cup. Pilot compass correction card Level-off at descent airspeed Occasionally, the VSI is slightly out of calibration and may indicate a climb manhal descent when the airplane is in level flight.

AR requires a magnetic compass for all flights. A banked helicopter turns; however, when the lateral axis of the helicopter is level, the helicopter flies straight. The magnetic field pulls on the end of the magnet, causing the card to rotate toward the east. Instrument approach procedure chart with maximum air traffic control facilities available Bank control instruments FM If the turn is made with too shallow a bank angle, inertia is greater than gravity and the ball feld upward to the outside of the turn.

Adjust power to maintain desired airspeed. Copy to clipboard Close. Drawing a course line from a known point The primary instrument is one that gives the most pertinent information for a particular maneuver and is usually held at a constant indication.

Army Field Manual FM , Fundamentals Of Flight – PPRuNe Forums

A straight-ahead or turning autorotation is practiced by reference to instruments ensuring that an aviator can take prompt corrective action to maintain positive aircraft control in case of engine failure. This erection can take as long as five minutes but is normally complete within two to three minutes.

Determining radius of action, part III This is the reverse of changing from TH to MH. Link network that ffm this resource. C x FM The use of brakes to control heading usually results in overcontrolling and extending the takeoff roll and should be avoided.

Recheck the altimeter and VSI to determine whether the correction was adequate.