CSP
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902RFM207E
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1
ROTORCRAFT FLIGHT MANUAL
MD900 (902 Configuration with PW 207E)
Systems Description
Original
7
−
11
Reissue 2
Longitudinal and lateral trim actuators
- Allow the pilot to position the cyclic
as required during flight and while on the ground.
Longitudinal linkages
- Allow for cyclic input to the main rotor blades for helicop
ter pitch control.
Longitudinal servoactuator - Hydraulically transfers longitudinal linkage inputs
to position the upper flight controls.
Lateral linkages
- Allow for cyclic input to the main rotor blades for helicopter
roll control.
Lateral servoactuator
- Hydraulically transfers lateral linkage inputs to position
the upper flight controls.
The collective controls subsystem
controls helicopter lift (vertical control) and
thrust. As the collective stick assembly is moved, control linkages increase or de
crease the rotor blades angle of attack.
The collective pitch system includes two automatic control features:
Conventional ``anticipatory” circuit into the Engine Electronic Controls (EEC) to
prepare them for an upcoming change of power demanded by the changing collective
pitch position, and vertical stabilizer incidence angle change (VSCS).
The collective control subsystem consists of:
Collective stick assembly - Provides pilot control of helicopter lift.
Collective friction unit
- Allows collective stick assembly resistance to vary
from 5-25 lb (2.27-11.34 kg).
Collective friction release switch - Allows the pilot to release collective stick
assembly resistance.
Collective linkages
- Allows the pilot to transmit collective input to the upper
flight controls.
Collective servoactuator - Hydraulically transfers collective linkage inputs to
the upper flight controls.
Summary of Contents for MD900 Explorer
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