Propeller Synchronizer; Propeller Sync Pointer - Beechcraft Baron G58 Pilot Operating Handbook

Section 7
Systems Description Model G58
The propellers should be cycled occasionally during cold
weather operation. This will help maintain warm oil in the pro-
peller hubs so that the oil will not congeal.

PROPELLER SYNCHRONIZER

The propeller synchronizer automatically matches the RPM of
both propellers. The system's range of authority is limited to
approximately 25 RPM. Normal governor operation is
unchanged but the synchronizer will continuously monitor pro-
peller RPM and adjust one governor as required.
A magnetic pickup mounted in each propeller governor trans-
mits electric pulses to a transistorized control box installed
behind the pedestal. The control box converts any pulse rate
differences into correction commands, which are transmitted to
the appropriate governor.
A toggle switch installed on the pilot's subpanel turns the sys-
tem on. To operate the system, manually synchronize the pro-
pellers and then turn the PROP SYNC switch ON. To change
RPM, adjust both propeller controls at the same time. This will
keep the setting within the limiting range of the system. If the
PROP SYNC switch is ON but unable to adjust the propeller
RPM, the system has reached its range limit. Turn the PROP
SYNC switch OFF, synchronize the propellers manually, and
turn the PROP SYNC switch ON.

PROPELLER SYNC POINTER

A propeller sync pointer, located in the RPM display, aids the
pilot in accomplishing manual synchronization of the propel-
lers. The pointer will point to the left or right of its 12 o'clock
position to indicate the slow-running-engine.
7-32 May, 2015