A variable-pitch propeller having a governor which automatically changes the pitch to maintain constant engine speed.
A propeller in which the pitch is adjusted automatically, so that the propeller revolves at a given rate dictated by the pilot and remains at that rate irrespective of maneuvers or throttle position. The pitch of the propeller is altered suitably by a centrifugal governor, so that the original RPM is restored if there is any increase or decrease in RPM. A constant-speed propeller retains an efficient angle of attack over a wide forward speed range by altering the blade angle constantly. This type of propeller is used on multiengine aircraft if it is provided with full feathering capability.
Unpressurised, and powered by a Textron-Lycoming 180hp piston engine driving a Hoffman three-bladed, constant-speed propeller, the Tutor can cruise at 130kts at sea level and climb to 5,000ft in seven minutes.
Hartzell Propeller has signed an agreement with Hawker Beechcraft to supply constant-speed propellers for the airframer's new piston and turboprop aircraft, including the Beechcraft G36 Bonanza, G58 Baron and the King Air C90GTX, B200GT and 350i.