In a two-cycle engine, how often does a power stroke occur relative to crankshaft revolutions?

In a two-cycle engine, a power stroke occurs every crankshaft revolution. This is because a two-cycle engine is designed to complete a power stroke with each revolution of the crankshaft. The cycle consists of two strokes (intake and compression) and one power stroke, which means that after one complete revolution, the engine produces power and goes through the exhaust phase simultaneously.

This design allows two-cycle engines to deliver power more frequently than four-cycle engines, which require two revolutions for every power stroke due to their more complex cycle involving separate intake, compression, power, and exhaust strokes. Thus, the correct understanding of a two-cycle engine's operation shows that it is optimized for efficiency and power delivery, making the statement that a power stroke occurs every full revolution accurate.