Rotax 447 UL
Rotax 503 UL
Rotax 582 UL
Rotax 912 UL
Rotax 912 ULS
Rotax 914 UL

Shown here with electric starter and B type gearbox.

Rotax 447 UL SCDI 40HP

  • 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. / 436.5cm
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

Documentation

Information sheet 447info.pdf / 363Kb / Adobe Acrobat format
Performance graphs 447perf.pdf / 20Kb / Adobe Acrobat format
Technical drawings 447draw.pdf / 201Kb / Adobe Acrobat format
Manuals Visit www.rotax-aircraft-engines.com
Service documentation Visit www.rotax-owner.com