Apparatus for the control of an aerial propeller

Details Apparatus for the control of an aerial propeller Apparatus for the control of an aerial propeller

F - Mech Eng,Light,Heat,Weapons

15

B

138/80.13

F15B 11/00 (2006.01) B64C 11/38 (2006.01)

Patent

CA 1212300

ABSTRACT. APPARATUS FOR THE CONTROL OF AN AERIAL PROPELLER. Apparatus for controlling the pitch of the blades of a variable pitch, governor controlled, aerial propeller of which the pitch of the blades is variable between a coarse pitch limit and a fine pitch limit to match the torque of its prime mover has holding means (A) to maintain a forward thrust-generating blade pitch angle greater than the fine pitch limit with the prime mover idling as when an aircraft propelled by the propeller is taxi-ing whereby the propeller rotates more slowly, and hence more quietly, than it would otherwise. Preferably the holding means is effective by actuating a lock pitch solenoid valve (21) and an autofeather valve (18).

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