Four-Stroke Design Aircraft Engines
The four-stroke glow or nitro engine is an elegant idea, though not as simple as its two-stroke counterpart. While there are many variations on the style, the basic aspects remain the same.
There is a piston returning and forth in a cylinder, that turns a turning crankshaft. There is a combustion event on every 4th stroke of the piston (at the start of every other down-stroke). The combustion is triggered by a platinum aspect in a heated glow plug, integrated with a compressed fuel-air (and oil) mix. There are consumption and exhaust ports, as well as a carburetor to mix air with fuel in the required ratio.
This engine has separate intake and exhaust valves. These are operated by a web cam plan. The most typical design is overhead valves that are opened by pushrods, and nearby return springs. The fuel brings its own oil. Being able to remove the battery after the engine starts, due to the self-reliant glow-plug, decreases weight substantially.
RC Tanks is extremely desirable in a model aircraft engine.
Compared to two-strokes, four-strokes are typically quieter and have a more practical (much deeper pitched) sound. These benefits make them a good option for scale models.
Go to the if you require more details about starting or repairing these engines
RC Airplane Advisor.
Being able to eliminate the battery after the engine begins, due to the self-reliant glow-plug, reduces weight significantly. This is very preferable in a design plane engine.
Compared to two-strokes, four-strokes are generally quieter and have a more sensible (much deeper pitched) sound.
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