Propeller pitch change mechanism with impulse turbines

Details Propeller pitch change mechanism with impulse turbines Propeller pitch change mechanism with impulse turbines

1993-11-24

1995-02-21

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Having positive means for impeller adjustment

Motor bodily rotatable with impeller hub or shaft

416157R, 416162, 416165, B64C 1142

Patent

active

053910559

ABSTRACT:
The pitch of either a fan or propeller driven by a gas turbine engine is changed by utilizing a pair of impulse turbines interfacing between the stationary and rotating portion of the fan or propeller and utilizing a servo control responding to a desired pitch input signal for actuating the normally inactive impulse turbines during fixed pitch to drive the impulse turbine which in turn is operatively connected through a pitch change actuator to change the pitch in accordance with the input signal.

REFERENCES:
patent: 3664763 (1972-05-01), Chilman
patent: 3802799 (1974-04-01), McMurtry
patent: 3866415 (1975-02-01), Ciokajlo
patent: 4523891 (1985-06-01), Schwartz et al.
patent: 4750862 (1988-06-01), Barnes et al.
patent: 5141399 (1992-08-01), Duchesneau et al.
patent: 5199850 (1993-04-01), Carvalho et al.

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