Effectivity: 912 Serie
Edition 4 / Rev. 0
BRP-Rotax Page 7-7
November 01/2016
7.5) Propeller gearbox
Reduction ratio
For the engine type 912 one reduction ratio is available.
Reduction ratio 912 A/F/UL 912 S/ULS
crankshaft: propeller
shaft
2.27:1
2.43:1
2.43:1 (option)
Overload clutch
Depending on engine type, certification and configuration the
propeller gearbox is supplied with or without an overload clutch.
NOTE
This overload clutch will prevent any undue load to the crank-
shaft in case of ground contact of the propeller.
NOTE
The overload clutch is installed on serial production on all certi-
fied aircraft engines and on the non-certified aircraft engines of
configuration 3.
Figure .5: Overload clutch
Fig. shows a propeller gearbox of configuration 2 with the inte-
grated overload clutch.
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