Rotax 912 ULS DCDI 100HP Aircraft Engine

• 4-stroke engine specially developed for recreational aircraft. Also exists in a certified version: Rotax 912 S.

• 4 horizontally opposed cylinders, "boxer" configuration

• Free air cooled cylinders, liquid cooled cylinder heads with integrated pump and expansion tank

• Dry sump forced lubrication with integrated pump and separate oil tank

• 8 valves, automatic adjustment by hydraulic valve tappet

• Dual Capacitor Discharge Ignition (DCDI) with RFI noise suppression

• Two Bing Constant Depression (CD) carburetors

• Mechanically driven diaphragm fuel pump

• Integrated heavy duty electric starter

• Integrated reduction gearbox, ratio of 2.43:1 with slipper clutch standard

• Various liquid and oil radiators available

• Many option available such as: Vacuum pump, external alternator, hydraulic propeller governor

• Operates on automotive fuel with a minimum octane rating of 91 (Canadian standards)

• Time Between Overhauls (TBO): 1500 hours*

Performance

• Maximum Power*




• (5 minutes)Maximum Power (sustained)Maximum Torque

Combustion Chambers

• BoreStrokeDisplacementCompression ratio

Weight

• Engine with carburetorsExhaust SystemAir BoxAir FilterLiquid RadiatorOil RadiatorRegulator-RectifierInstalled WeightWeight/power ratio

100HP / 73.5KW @ 5800 RPM
95HP / 69.0KW @ 5500 RPM
94ft-lb / 128NM @ 5100 RPM
*100HP maximum power when optional air box and tuned exhaust are installed.
3.31" / 84mm
2.40" / 61.0mm
82.6cu.in. / 1352cm³
10.5:1
124.7lbs / 56.6Kg
8.8lbs / 4.0Kg
2.9lbs / 1.3Kg
0.7lbs / 0.3Kg
2.2lbs / 1.0Kg
1.1lbs / 0.5Kg
0.2lbs / 0.1Kg
140.6lbs / 63.8Kg
1.41lbs/HP / 0.87Kg/KW