Propeller Owner’s Manual
139
DESCRIPTION AND OPERATION
61-00-39
Page 2-34
Rev. 17 Apr/20
(5) Feathering governors allow oil to be pushed from the
propeller to the engine drain to increase propeller pitch
to feather.
(a) Some governors will move the propeller to feather
by electrically or mechanically actuating a valve that
opens to drain the oil supply between the propeller
and governor to increase propeller pitch and allow
the propeller to feather.
(b) Figure 2-13 illustrates another feathering propeller
governor system. When it is desired to feather the
propeller, the lift rod may be moved by the cockpit
control to mechanically engage the valve. The lifted
valve dumps oil to increase propeller pitch until the
propeller feathers.
Feathering Governor
Figure 2-13
APS6152
Pilot Control
Speeder Spring
Flyweights
Pilot Valve
Lift Rod
