1) Hydr. Governor For Const. Speed Propeller, Vacuum Pump - Rotax OM-912 Operator's Manual

9.5.1)
Effectivity: 912 Serie
OM Edition 1 / Rev. 0
Hydr. governor for const. speed propeller, vacuum pump:
Alternatively either a vacuum pump or a hydraulic governor for
constant speed propeller can be used. The drive is in each case via
the propeller reduction gear.
Gear ratio:
crankshaft : propeller shaft
propeller shaft : hydraulic governor/vacuum pump
crankshaft : hydraulic governor/vacuum pump
◆ NOTE:
BRP-Rotax
gear ratio
Transmission ratio between crankshaft and hy-
draulic governor or vacuum pump is either
1,842 or 1,724 i.e. the speed of the hydraulic
governor or vacuum pump is either 0,54 or 0,58
of engine speed.
2,27 : 1 2,43 : 1
0,758 : 1
1,724 : 1 1,842 : 1
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Jan.01/2007