Aircraft engine propeller overspeed protection technical field

Details Aircraft engine propeller overspeed protection technical field Aircraft engine propeller overspeed protection technical field

1990-02-26

1991-05-28

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

With control means responsive to non-cyclic condition...

With electrical means comparing and reducing error related...

416 36, 416 43, 416 44, B64C 1140

Patent

active

050190067

ABSTRACT:
An aircraft engine propeller autofeather system (4) has a feather solenoid (8) which is actuated by either a signal provided by an engine power loss detector (10) or a signal provided by an engine overspeed detector (12). The overspeed detector (12) detects excessive propeller speed by comparing the speed to a first predetermined value (21) or by comparing the speed rate of change to a second predetermined value (23) combined with comparing the speed to a third predetermined value (25).

REFERENCES:
patent: 2322303 (1943-06-01), Martin
patent: 2499376 (1950-03-01), Ferrill, Jr.
patent: 2640550 (1953-06-01), Knapp et al.
patent: 2667228 (1954-01-01), Wood et al.
patent: 3589830 (1971-06-01), Morgren et al.
patent: 4845617 (1989-07-01), Kamenetz et al.

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