Propeller Owner's Manual
115N
DESCRIPTION AND OPERATION
61-00-15
Page 2-29
Rev. 24 Dec/20
(3) When the engine has shut down or failed, no oil is
available from the engine oil pump to the governor;
therefore, no governed oil is available from the
governor for controlling the propeller blade angle and
RPM. Unfeathering occurs when a switch is activated
energizing the coil on the accumulator solenoid valve.
The activated coil changes the valve from a one-way
valve to an open passage allowing reverse flow back
out of the accumulator and to the governor. The air or
nitrogen pressure in one side of the accumulator will
push a piston to force oil from the other side of the
accumulator through the governor to the propeller piston
to move the propeller blades from feather to a lower
blade angle. The propeller will then begin to windmill and
permit the engine to start.
Содержание HC-C2YR-4CF/FC8475-6
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