What type of engine powers the models?
The capacity as mentioned above is usually 30 or 60 size Similar to fixed winged models, the majority of model helicopters are powered by two stroke glow plug motors. However model helicopter engines are slightly different to the model aeroplane equivalent, in that the cylinder head has a larger heat sink or cooling fins and modified carburettor to give accurate throttle control at 50% power, the setting at which most flying is performed. Typical engines are 32SXH (30 size) and 60SXH (60 size). The ‘H’ indicates it is designed for helicopter use. The engines usually have a ball raced crankshaft and piston ring (this is not common with aeroplane engines). The power developed is about 1.2 horsepower for the 30 size and 2.
