Rotax 277

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Type Piston aero-engine
National origin Austria
Manufacturer Rotax
Major applications Ultralight aircraft

The Rotax 277 is a 26 hp (19 kW), single-cylinder, two-stroke aircraft engine, that was built by BRP-Rotax GmbH & Co. KG of Austria for use in ultralight aircraft.[1][2]


The Rotax 277 features a single piston ported, air-cooled cylinder head and cylinder, utilizing either a fan or free air for cooling. Lubrication is pre-mixed fuel and oil. The 277 has a single Bosch flywheel magneto generator 12 volt ignition system and is equipped with a 36 mm Bing double float carburetor, with either a hand lever or cable choke.[1][2]

The Rotax 277 is no longer in production.[1]


Specifications (277)[edit]

Data from ROTAX 277 UL Data Sheet[1]

General characteristics

  • Type: two-stroke air-cooled aeroengine
  • Bore: 72 mm (2.83 in)
  • Stroke: 66 mm (2.60 in)
  • Displacement: 268.7 cc (16.40 cu in)
  • Dry weight: 29.5 kg (65 lb) (complete including reduction drive and exhaust system)


  • Valvetrain: piston ports
  • Fuel system: pneumatic pump pressurized
  • Fuel type: premium unleaded autofuel
  • Oil system: premixed in the fuel at 50:1
  • Cooling system: fan or free air


See also[edit]


  1. ^ a b c d BRP-Rotax GmbH & Co. KG (n.d.). "ROTAX 277 UL - 26 hp Fan Cooled" (PDF). Retrieved 2009-03-14. 
  2. ^ a b Raisner, William: LEAF catlog, pages 6-105. Leading Edge Airfoils, 1995.