Rotax 447 UL SCDI 40HP Aircraft Engine

- 2-stroke engine specially developed for recreational aircraft
- 2 cylinders, cooled by fan
- Piston ported intake
- Single capacitor discharge Ignition (SCDI)
- Single Bing carburetor
- Mikuni pulse driven diaphragm fuel pump
- Recoil or electric starter
- Available with various exhaust system configurations
- Operates on a mix of automotive fuel with a minimum of 87 octane rating (Canadian standards) and super 2-stroke oil of API-TC classification, 50:1 ratio
- Time Between Overhauls (TBO): 300 hours

Performance

Maximum power 39.6HP / 29.5kW
@6500 RPM

Maximum torque 34.0ft-lb / 46NM
@6000 RPM

Maximum RPM 6800 RPM

Combustion Chambers

Bore 2.66″ / 67.5mm

Stroke 2.40″ / 61.0mm

Displacement 26.64cu.in. / 436.5cm³

Compression ratio Theoretical: 9.6
Effective: 6.3

Weight

Engine with carburetor 61.3lbs / 27.8Kg

Exhaust system 10.8lbs / 4.9Kg

Air filter 0.4lbs / 0.2Kg

No gearbox, no electric starter 72.5lbs / 32.9Kg

B gearbox,
no electric starter 82.4lbs / 37.4Kg

B gearbox,
electric starter 93.2lbs / 42.3Kg

C gearbox,
no electric starter 90.1lbs / 40.9Kg

C gearbox,
electric starter 100.9lbs / 45.8Kg

E gearbox 97.2lbs / 44.1Kg