The real four-stroke cycle in an aircraft piston engine.

You may already be familiar with the "Suck, Squeeze, Bang and Blow" cycle of a typical piston engine. This video explains what the realistic four stroke cycle of a piston engine looks like and why engines are designed this way.

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Further reading:
The Pilot's Manual - Flight Training : Complete Preparation for All the Basic Flight Maneuvers by Aviation Theory Centre: https://amzn.to/3gF6jYI?