Aircraft engine fatigue cycle recorder

Details Aircraft engine fatigue cycle recorder Aircraft engine fatigue cycle recorder

1975-05-19

1976-09-07

Morrison, Malcolm A.

Registers

Transfer mechanism

Traveling pawl

73116, 235 92MT, 23515022, 244194, G06G 778

Patent

active

039795799

ABSTRACT:
In an aircraft, a system for recording aircraft fatigue cycles senses engine starting, engine shutdown, landing gear status, engine reversal and throttle setting and derives therefrom unit and fractional cycles. The system includes a first memory responsive to the aforementioned sensors for producing an indication of when the aircraft is in flight and a second memory for producing an indication of when the landing gear are dropped in flight. These memory indications are fed to gates which index the units counter when a takeoff, landing and engine shutdown cycle is completed and which index the fractions counter when a retakeoff without engine shutdown is accomplished. Other gates cause the units counter to be indexed when the engine is restarted in flight. In a multi-engine aircraft, sensors and counters are provided individually for each engine.

REFERENCES:
patent: 3238768 (1966-03-01), Richardson
patent: 3512128 (1970-05-01), Maki
patent: 3593012 (1971-07-01), Lang
patent: 3678256 (1972-07-01), Harenberg, Jr.
patent: 3686484 (1972-08-01), Clemochowski
patent: 3758756 (1973-09-01), Johns

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