OS 25 Size 440 Watt Motor OMA-3820-1200 $169.00
OS 25 Size 440 Watt Motor OMA-3820-1200
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OS Brushless Motors finally take the black art and guesswork out of electric motor installation for your aircraft, with a range of electric motors sized from an equivalent 05 to 50 size glow engine, and with a stainless steel propeller shaft to accept a standard aircraft propeller just like a glow engine.

To make motor selection even easier, CLICK HERE for a complete table of propeller, LiPo and ESC setups for every motor.

For installation specifications, CLICK HERE for a complete table of dimensions and weights.

True to the OS heritage that has made OS glow engines world famous for 75 years, OS electric motors are manufactured to the same high quality standards. Among their design innovations is a proven cooling system that keeps running temperatures low for greater efficiency and more power. Choose the size that's right for your model.

All motors feature a distortion resistant can, centrifugal fan for superior cooling, high quality ball bearings, stainless steel propeller shaft and includes motor mount, propeller adapter and connectors.


  • OMA-3820-1200 "25 Size".
  • Rotor diameter: 38mm.
  • Magnet length: 20mm.
  • kV: 1200.
  • Watts: 440.
  • Weight: 155 grams.

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