The Propeller Synchrophaser System controls the propeller speed and phase relationship on twin-engine aircraft to eliminate engine beats and minimize sound and vibration in the aircraft. The system receives speed signals from the left and right engine, compares their frequency and phase relationship, and produces correction signals that are imposed on the left and/or right propeller governor. The correction signals allow the slower propeller to increase and the faster propeller to decrease in speed, until both propellers are rotating at the same speed.
The Synchrophaser System also controls the phase relationship of the two propellers by electronically delaying the speed signal from the right or left propeller. The amount of delay is evaluated during flight test to minimize sound and vibration in the cockpit. A CANaerospace network interface allows the Synchrophaser System to communicate with other aircraft systems for data exchange, maintenance operation and system configuration.