O.S. Engines 18750 105HZ-R DRS 1.05 Helicopter Engine OSMG1961

This is an O.S. Engines 105HZ-R DRS 1.05 Helicopter Engine. Specs : Bore : 1.14 in (29 mm) Crankshaft Threads : UNF 5/16-24 Cylinders : Single Displacement : 1.048 cu in (17.17 cc) HP : 3.65 hp @ 15,000 rpm Height : 3.9 in (99 mm) Length : 4.5 in (115 mm) Plug Type : #8 glow plug RPM Range : 2,000 - 16,500 rpm Recommended Fuel : Heli blend glow fuel with 15% nitro content Stroke : 1.02 in (26 mm) Total Weight : 21.5 oz (608 g) Width : 2.4 in (61 mm)