Effectivity: 914 Series
Edition 2 / Rev. 0
d04283
page 127
July 01/2008
BRP-Rotax
INSTALLATION MANUAL
20) Propeller drive
The propeller in tractor or pusher arrangement has to be fitted on the propeller flange in
accordance to current certification. As required utilize one of the three possible pitch circle
diameters (P.C.D.) on the flange.
Certification of the propeller sizing and arrangement to the latest requirement such as FAR or
EASA has to be conducted by the aircraft manufacturer.
▲ WARNING: Never run the engine without a propeller installed as engine would suffer
severe damage by overspeeding.
Never fit propeller directly on crankshaft.
20.1) Technical data
See Fig. 85.
- direction of rotation
of the prop flange: counter clockwise, looking towards face of flange
- location: see system of coordinates
- attachment of propeller on prop shaft flange:
P.C.D 75 mm (2,95"): 6 bolt holes of 8 mm (.32 in.) dia
P.C.D 80 mm (3,15"): 6 bolt holes of 11,5 mm (.45 in.) dia
P.C.D 101,6 mm (4"): 6 bolt holes of 13 mm (.51 in.) dia.
hub diameter: 47 mm (1.85 in.)
- ratio of gear reduction: 2,4286 (51 T/21 T)
- max. torque: 340 Nm (250 ft.lb.) at propeller
- max. moment of inertia : 6000 kgcm
2
(14.238 lb.ft.
2
)
- max. permitted static
out-of-balance on a prop: max. 0,5 gm (.043 lb.in.)
- max. extension of the propeller shaft: 120 mm (4.72 in.)
■ CAUTION: No modification of propeller shaft is permitted.
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