Graupner,OS MAX 61 SX-H C(ex1857),1889

OS MAX 61 SX-H C(ex1857) Graupner 1889 9.95 cm³ capacity. Twin-ballraced, high-performance motor with ringed piston, side exhaust and heat-sink head. Suitable for the SUPERIO helicopter, No. 4464. Not suitable for GRAUPNER/HEIM mechanics No. 4448, 4682 and 4450.N.

The OS MAX 61 RX and SX helicopter motors, No. 1892, 1891, 1890 and 1889 are equipped as standard with the OS type 60 B carburettor. This features the normal adjustments for full throttle and idle, but also a third additional needle valve which can be used to adjust the fuel / air mixture in the mid-speed range.