Helicopter engine control with rotor speed decay anticipator

Details Helicopter engine control with rotor speed decay anticipator Helicopter engine control with rotor speed decay anticipator

1982-04-16

1984-08-21

Krizmanich, George H.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

123325, 123326, 416 30, F16D 2302, B60K 4102

Patent

active

044665261

ABSTRACT:
The speed (54, 56) of the free turbine (40) of a helicopter engine (20) is compared (103) with the speed (105, 106) of the helicopter rotor (10) to indicate (101, 102) autorotation, and the deceleration (108) of the rotor above a threshold magnitude (110) is utilized (81, 68, 69) to increase fuel flow (72) to the engine in anticipation of rotor speed droop which would otherwise occur during recovery from the autorotation maneuver.

REFERENCES:
patent: 2961052 (1960-11-01), Smith et al.
patent: 2991618 (1961-07-01), Marscher et al.
patent: 4244244 (1981-01-01), Rembold et al.

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