Installation Manual
UL
POWER
UL350i UL350i
F
UL350i
S
UL 350i
HPS
350i
SA
MI 350A01 Revision No: 7
Date:
2014-09-15
Page:
56
of
60
Propeller drive
The UL350 is a direct drive engine. The propeller is mounted on the propeller flange which is
directly connected to the crankshaft; no gearbox or belt reduction is used. The propeller flange is
fixed to crankshaft with a splined connection to take the torque loads and is held in position by a
single central bolt. The bolt is locked with a special locking washer. A large ball bearing is used as
thrust bearing which is held in position by two disc springs and a spacer ring. This assembly allows
engine to be used in either tractor or pusher configuration. Engine turns clockwise when seen from
cockpit in tractor configuration.
The propeller must be carefully selected to match the airframe and the engine characteristics. The
hub of the propeller must be drilled with holes to match the flange. 6 propeller drive lugs are
provided with the engine. These are made to have a tight fit in the propeller flange holes.
ULPower offers different types of propeller flanges.
1.
Standard Flange
Summary of Contents for UL35Oi
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