Rotax 912-UL User Manual

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page 7 - 1
Jan. 01/2007
Effectivity: 912 Serie
OM Edition 1 / Rev. 0
BRP-Rotax
7) Description of design
4-stroke, 4 cylinder horizontally opposed, spark ignition engine, one central camshaft
- push-rods - OHV
Liquid cooled cylinder heads
Ram air cooled cylinders
Dry sump forced lubrication
Dual breakerless capacitor discharge ignition
2 constant depression carburetors
mechanical fuel pump
Prop drive via reduction gear with integrated shock absorber and overload clutch
◆ NOTE: The overload clutch is installed on all serial production aircraft
engines which are certified and on non-certified aircraft engines
of the configuration 3.
Electric starter (12V 0,6 kW)
Electric starter (12V 0,9 kW), optional
Integrated AC generator with external rectifier-regulator (12V 20A DC)
External alternator (12V 40A DC), optional
Vacuum pump: (only for A1, A2 and A4 possible), optional
Hydraulic constant speed propeller governor: (for A3 only), optional

Rotax 912-UL Specifications

General

Displacement	1211 cc
Bore x Stroke	79.5 mm x 61 mm
Compression Ratio	9.0:1
TBO (Time Between Overhaul)	2000 hours
Engine Type	4-cylinder, 4-stroke
Power Output	80 hp
Cooling System	Liquid/air-cooled
Fuel Type	Avgas 100LL or unleaded automotive gasoline
Oil Capacity	3 liters
Fuel System	2 carburetors
Oil System	Dry sump forced lubrication with separate oil tank
Reduction Gear Ratio	2.43:1
Max Continuous Power	75 hp (56 kW)