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OS LA .25

The new standard in sport engine technology, in a unique streamlined design

  • More cooling fin area extends the life of the engine, and virtually eliminates engine seizures in the air
  • Added "webbing" on the crankcase strengthens high-stress areas to help ensure that they stand up to the rigors of learning to fly
  • Overall tighter needle valve fit utilizes an "O" ring to help maintain the performance levels you need
  • A fuel inlet that points up allows for easier fuel line access for fueling and defueling
Displacement 0.2485 (4.0 cc)
Bore 0.7087 in (18 mm)
Stroke 0.63 in (16 mm)
RPM 2500 - 16000


0.6 BHP @ 15000 RPM
Weight 6.9 oz (197 g)
Recommended Props 9x5-6, 10x5
Price R Not Available