New engine from O.S.

It’s always nice to see a new engine from O.S. – I’ll let the Ripmax press release do the talking….

“Designed specifically for light weight and high power output from a compact crankcase, the new Max 35AX is an ideal engine for ‘Fun Fly’ and 3D flying.

The new crankcase follows the theme of all the new AX range and the 35AX will fit exactly where the old 32SX did without modification.

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The new E-3080 muffler is highly effective and features a sealing O-ring between the two main sections. As you would expect, the silencer outlet can be rotated to and desired position.
With only 10g more than the old Max 32SX, the 35AX has very little weight penalty for it’s substantial power increase.”


  • Name: O.S. Max 35AX
  • Capacity: 5.77cc (
  • Propeller Range: 10 x 6, 10 x 7, 11 x 5, 11 x 6,

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  • Weight: 280g (9.88oz)
  • Bore: 20.2mm (0.795in)
  • Stroke: 18.0mm (0.709in)
  • Power Output: 0.9PS @ 11,000rpm
  • Practical RPM: 2,500 – 13,000
  • RRP: £109.99
  • UK distributor: Ripmax Ltd,

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