A control circuit (20) for changing the angle of propeller blades (17) includes a propeller pitch change mechanism (21), and a fixed-displacement pump (22) providing the supply of oil from an engine oil return system (13). A valve (30; 130) has an outlet port (33) to direct oil from a cavity (35) of the valve (30), and a pitch port (34) in fluid communication with the pitch change mechanism (21). A spool (36) of the valve (30) is operable between a first position and a second position to respectively open and close the outlet port (33), and direct oil flow away from or to the pitch change mechanism (21).
PROPELLER BLADE ANGLE CONTROL SYSTEM
SYSTEM ZUR STEUERUNG EINES PROPELLERSCHAUFELWINKELS
SYSTÈME DE COMMANDE D'ANGLE DE PALE D'HÉLICE
2021-07-07
Patent
Electronic Resource
English
IPC: | B64C AEROPLANES , Flugzeuge |