AM.III.M.K9

From the FAA library

• Airplane Flying Handbookp. 13-7
  Chapter 13: Transition to Multiengine Airplanes › Operation of Systems › Propeller Synchronization

  takeoff, landing, and single-engine operation. The AFM/POH should be consulted for system description and limitations. A variation on the propeller synchronizer is the propeller synchrophaser. A propeller synchrophaser acts much like a synchronizer to precisely match ... synchronizing engine rpm using the audible propeller beat. This gauge is also found installed with most propeller synchronizer and synchrophase systems. Some synchrophase systems use a knob for the pilot to control the phase angle…

• Aviation Maintenance Technician Handbook - Powerplantp. 7-19
  Chapter 7: Propellers › Ice Control Systems › Deicing Systems

  when the propellers are rotating and for short test periods of time during the takeoff check list or system inspection. Propeller Synchronization & Synchrophasing Most multi ... engine aircraft are equipped with propeller synchronization systems. Synchronization systems provide a means of controlling and synchronizing engine rpm. Synchronization reduces vibration and eliminates the unpleasant beat produced by unsynchronized propeller operation. The synchrophasing system is designed to maintain…

• Aviation Maintenance Technician Handbook - Powerplantp. 7-19
  Chapter 7: Propellers › Propeller Auxiliary Systems › Autofeathering System

  Synchronization reduces vibration and eliminates the unpleasant beat produced by unsynchronized propeller operation. The synchrophasing system is designed to maintain a preset angular relationship between the designated master propeller and the slave propellers. A typical synchrophasing system is an electronic…