[aeronautics] Overspeed is the aircraft flight condition when the airspeed exceeds a safe limitation. This is hazardous as it may damage the aircraft control surfaces or airframe. ...[engine] 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, chief amongst them the duration of the overspeed and by the speed attained. With some engines even a momentary overspeed can ...
the maximum rotational speed to which traction motors and rotating machines forming part of the electrical equipment are subjected on the test bed to check their mechanical strengththe maximum speed to which an internal combustion engine is subjected on the test-bed, under specified conditions