OS MAX 70SZ-H Ring Helicopter engine.

Features ringed piston for long life. 3-needle carb for ultimate tuning precision

Two extra mounting lugs on front allow modellers to mount engine securely in helis. Designed with the FAI F3C competitor in mind, allowing 3D pilots an edge over the standard .60 size engine. Throttle assembly reference marks make it easy to note and restore finely tuned settings after maintenance. Front and rear ball bearing-supported crankshaft reduces friction and wear. Large heli cylinder head offers generous cooling fin area, with increased webbing on crankcase front for heat dissipation. Installs in the same space as a .61 engine.

INCLUDES:

       No.8 OS Glow Plug and instruction manual

      SPECS:
       Displacement:11.50cc(.702cu.in)
       Bore:25.8mm(1.016in)
       Stroke:22.0mm(.866")
       Output:2.5HPat16,000RPM
       Weight:553.5g(19.5oz)
       PracticalRPMRange:2,000-18,000RPM
       Crankshaft Thread Size: 5/16-24

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