A propeller pitch control system for a turboprop engine of an aircraft includes an engine control unit and a pitch control unit. The engine control unit is operable to determine a phase of flight of the aircraft and is configured to supply control commands. The pitch control unit is coupled to receive the control commands from the engine control unit and includes a housing, a beta piston, a position sensor, a beta tube, and an electrohydraulic valve. The engine control unit only commands the electrohydraulic valve to move the beta piston from the fully retracted position when the engine control unit determines the aircraft is conducting pre-takeoff roll taxiing operations or is conducting post landing touchdown operations.
PROPELLER PITCH CONTROL SYSTEM FOR AIRCRAFT TURBOPROP ENGINES
2020-06-25
Patent
Electronic Resource
English
IPC: | B64C AEROPLANES , Flugzeuge |
Propeller pitch control system for aircraft turboprop engines
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