Fluid reaction surfaces (i.e. – impellers) – Having positive means for impeller adjustment – Power derived from impeller shaft
Patent
1988-07-05
1989-11-07
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Having positive means for impeller adjustment
Power derived from impeller shaft
416152, 416160, B64C 1132
Patent
active
048788090
ABSTRACT:
A pitch controller (10) for controlling the pitch of a plurality of blades (11) of a fan powered by a turbine propulsion engine, with a pitch adjusting device (16) having an input (18) for controlling the pitch of the blades. An input drive shaft (15) provides rotary power from the free turbine to the first input of a transmission (14). The transmission also has a second input (25) controlling the input to the pitch adjusting device, a first output (18) which is the input to the pitch adjusting device and a second output (21) which is applied to a rotary power device (20). Input power from the free turbine is provided to the rotary power device by the transmission which in response to a pitch control signal (28) causes the second input to rotate at a speed different from the first input thereby changing the pitch of the blades in proportion to the pitch control signal.
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Powell Jr. Everette A.
Sundstrand Corporation
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