Overspeed

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Overspeed is a condition in which an engine is allowed or forced to turn beyond its design limit. The consequences of running an engine too fast vary by engine type and model and depend upon several factors, the most important of which are the duration of the overspeed and the speed attained. With some engines, a momentary overspeed can result in greatly reduced engine life or catastrophic failure.^[1] The speed of an engine is typically measured in revolutions per minute (rpm).^{[2] [citation needed]}