ROTAX 912 ULS DCDI 100HP AIRCRAFT ENGINE

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• 4-stroke engine specially developed for recreational aircraft. Also exists in a certified version: Rotax 912 S.
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• 4 horizontally opposed cylinders, "boxer" configuration
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• Free air cooled cylinders, liquid cooled cylinder heads with integrated pump and expansion tank
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• Dry sump forced lubrication with integrated pump and separate oil tank
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• 8 valves, automatic adjustment by hydraulic valve tappet
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• Dual Capacitor Discharge Ignition (DCDI) with RFI noise suppression
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• Two Bing Constant Depression (CD) carburetors
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• Mechanically driven diaphragm fuel pump
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• Integrated heavy duty electric starter
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• Integrated reduction gearbox, ratio of 2.43:1 with slipper clutch standard
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• Various liquid and oil radiators available
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• Many option available such as: Vacuum pump, external alternator, hydraulic propeller governor
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• Operates on automotive fuel with a minimum octane rating of 91 (Canadian standards)
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• Time Between Overhauls (TBO): 1500 hours*
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rn PERFORMANCE rn
Maximum Power* (5 minutes)	100HP / 73.5KW @ 5800 RPM
Maximum Power (sustained)	95HP / 69.0KW @ 5500 RPM
Maximum Torque	94ft-lb / 128NM @ 5100 RPM
*100HP maximum power when optional air box and tuned exhaust are installed.
rn COMBUSTION CHAMBERS rn
Bore	3.31" / 84mm
Stroke	2.40" / 61.0mm
Displacement	82.6cu.in. / 1352cm³
Compression ratio	10.5:1
rn WEIGHT rn
Engine with carburetors	124.7lbs / 56.6Kg
Exhaust System	8.8lbs / 4.0Kg
Air Box	2.9lbs / 1.3Kg
Air Filter	0.7lbs / 0.3Kg
Liquid Radiator	2.2lbs / 1.0Kg
Oil Radiator	1.1lbs / 0.5Kg
Regulator-Rectifier	0.2lbs / 0.1Kg
Installed Weight	140.6lbs / 63.8Kg
Weight/power ratio	1.41lbs/HP / 0.87Kg/KW

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