Misc

Question 1

Engine Alternator

Answer 1

IND

• Ignition power to exciters during start
• Ng signal to cockpit
• DEC power

Question 2

MMU

Answer 2

• Collective to Pitch - Rotor downwash
• Collective to Roll - Translating tendency
• Collective to Yaw - Torque effect
• Yaw to Pitch - Lift component of tail rotor

Question 3

HMU

Answer 3

PM CAN VETO

• Pumps fuel at high pressure
• Meters fuel in response to PAS, LDS, DEC, and engine variables
• Collective pitch compensation through the LDS. When collective is moved, Ng is reset for immediate Np response.
• Accel/Decel fuel flow limiting prevents compressor stall and flameout
• Ng Limiting.
• Variable geometry positioning of the inlet guide vanes for optimum performance.
• DEC lockout. PAS override control with DEC INOP. Pilot can bypass TQ motor inputs.
• Torque motor to trim Ng output. Fine tune engine output. Override through Lockout.
• Opens Vapor Vents for manual HMU priming, to remove air from HMU

Question 4

Stabilator

Answer 4

SCALP

• Streamlines with rotor downwash at low airspeeds (>30 kts) to min. nose up attitude
• Collective coupling to minimize pitch attitude excursions from collective inputs, above 30 kts.
• Angle of Incidence decreases above 30 kts. To improve static stability
• Lateral sideslip to pitch coupling to reduce susceptibility to gusts. Stab up for right pedal, stab down for the left pedal.
• Pitch rate feedback to improve dynamic stability. Dampen pitch excursions due to turbulence or G forces.

Question 4

ODV

Answer 4

HOPS

• Hot start protection (900 degrees)
• Overspeed protection (Np). From DEC at 120% +/- 1%
• Purges main fuel manifolds and allows back flow of high-pressure air for purging
• Sends fuel through manifold to injectors for starting and operation