Eagle ICA-D212-725, Instructions Manual

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ICA-D212-725 (95)
Page
16 of 20
CHAPTER 95 – INSTRUMENT SYSTEM (95-00-00)

COPYRIGHT

2007 BY DART AEROSPACE LTD

THIS DOCUMENT IS PRIVATE AND CONFIDENTIAL AND IS SUPPLIED ON THE EXPRESS CONDITION THAT IT IS NOT TO BE USED FOR ANY PURPOSE OR COPIED
OR COMMUNICATED TO ANY OTHER PERSON WITHOUT WRITTEN PERMISSION FROM DART AEROSPACE LTD.
Revision:
4
Date: 11.06.01
95.4.2.4
Connect pitot line tubing to pitot tube
in upper nose area.
95.4.2.5
Perform pitot system leak check as
per 95.2.2 on affected system.
95.5 FLIGHT INSTRUMENTS
95.5.1 Flight Instruments
Flight instruments consist of airspeed, altimeter,
attitude, turn and bank, and vertical speed
indicators.
95.5.2 Airspeed Indicator
Airspeed indicators (pilot M30 and copilot M35)
are standard pitot static instruments, single
scaled, and calibrated in knots. The indicators
provide an airspeed of the helicopter at any time
during forward flight by measuring the difference
between impact air pressure from the pitot tube
and static air pressure from the static ports.
95.5.3 Altimeter
Altimeters (pilot M32 and copilot M33) furnish
direct reading of the helicopter height in feet
above sea level. The altimeters are connected
by static lines to the static pressure ports to
sense atmospheric pressure. An external
adjustment knob is provided to make
compensation for variations of prevailing
barometric pressure.
95.5.4 Attitude Indicator
Attitude indicators (pilot M2 and copilot M1)
display flight attitude of the helicopter relative to
the earth. Pitch attitude is indicated by motion of
the virtual sphere with respect to the yellow
reference bars. Roll attitude is indicated by
motion of the roll pointer with respect to the fixed
scale located at the top of the display. The
indicator virtual sphere can be adjusted for zero
pitch indication by using the 2 position switch
located on the front face of the unit. If the
indicator loses power the display will go blank.
Horizontal markings indicate the degree of dive
or climb, while bank (roll) angles are read from
the semi-circular scale located on the upper half
of the indicator face.
95.5.5 Turn and Bank Indicator
Pilot turn and bank indicator (M10) consists of a
rate-of-turn pointer and an inclinometer (ball)
which operate independently of each other. An
indicator gyro is self-contained in the indicator.
The rate-of-turn pointer is controlled by a self
contained electrically actuated gyro, and
indicates in which direction and at what rate the
helicopter is turning. The inclinometer (ball)
indicates when the helicopter is in directional
balance either in a turn or in straight and level
flight. If the helicopter is yawing or slipping, the
ball will be off center.
95.5.6 Vertical Speed Indicator
Pilot vertical speed indicator (M31) and copilot
vertical speed indicator (M34) register ascent and
descent speed of the helicopter in feet per
minute. The vertical speed indicators are
connected to static air system to sense the rate of
atmospheric pressure change.