Pitch control system for variable pitch propeller

Details Pitch control system for variable pitch propeller Pitch control system for variable pitch propeller

B - Operations, Transporting

64

C

244/120

B64C 11/40 (2006.01)

Patent

CA 1246519

Abstract Pitch Control System For Variable Pitch Propeller A propeller pitch control system having a mechanical low pitch stop which includes an electrical backup therefor. The backup comprises an electrically operatable means (245) to effect blade pitch adjustment toward feather under conditions of failure of the low pitch stop indicated by propeller operation at pitch angles in the range of beta operation, but power settings in the range of normal engine speed governor pitch control. Such operating conditions actuate a pair of switches (190 and 195) connecting the means (245) to a voltage source to increase blade pitch toward feather, thereby preventing overspeed operation of the propeller.

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