Diesel model airplane engines, such as the PAW shown right, are typically used in vintage rc airplanes to keep the model as authentic as possible; such engines were being manufactured long before glow plug technology and so were the first IC engines to be used in radio control flying.
Diesel engines do not use any form of plug for ignition but instead rely on the fuel/air mixture inside the combustion chamber to ignite from the friction heat generated by the piston moving up and down as the prop is flicked over to start.
The pressure inside the chamber (compression) can be increased or decreased by turning a threaded screw on top of the cylinder head; increasing pressure aids ignition of the fuel/air mixture. The fuel is a special mix that has a high ether content, which is easily ignited.
Diesel engines do not use any form of plug for ignition but instead rely on the fuel/air mixture inside the combustion chamber to ignite from the friction heat generated by the piston moving up and down as the prop is flicked over to start.
The pressure inside the chamber (compression) can be increased or decreased by turning a threaded screw on top of the cylinder head; increasing pressure aids ignition of the fuel/air mixture. The fuel is a special mix that has a high ether content, which is easily ignited.
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