Rotax OM-912 Operator's Manual page 71

7.5) Propeller gearbox
General note
Reduction ratio
Overload clutch
Torsional shock
absorber
Effectivity: 912 Series
OM Edition 2 / Rev. 0
See Fig. 5
For the engine type 912 two reduction ratios are available.
Reduction ratio
crankshaft: propeller shaft
Depending on engine type, certification and configuration the pro-
peller gearbox is supplied with or without an overload clutch.
NOTE: The overload clutch is installed on serial pro-
duction on all certified aircraft engines and on
the non-certified aircraft engines of configura-
tion 3.
Fig. 5
NOTE: Fig. shows a propeller gearbox of configuration
2 with the integrated overload clutch.
The design incorporates a torsional shock absorber. The shock
absorbing is based on progressive torsional cushioning due to axi-
al spring load acting on a dog hub.
BRP-Powertrain
912 A/F/UL
2.27:1
2.43:1 (optional)
912 S/ULS
2.43:1
02531
page 7-8
April 01/2010