rundown time

rundown time

The time taken by a turbine in a gas turbine engine to come to a complete halt after the engine has been switched off. It is one of the indicators of the state of health of an aircraft engine. Also called spool-down time.
References in periodicals archive ?
The BEMF unit ensures that motor-driven equipment up to 600 volts with a variable rundown time has completely stopped before access is possible.
The BEMF unit ensures that motor-driven equipment up to 600V with a variable rundown time has completely stopped before access is possible.
Operated by a solenoid within the unit, the tongue unit is only released from the lock when the operators have stopped the machine and the rundown time has elapsed, braking the channels of the safety circuit.
5 These models achieved Battery Rundown Time of at least the time shown during testing.