At the moment, you can run at over boost 2650 rpm for as long as you wish, yet there is a very interesting website (spitfireperformance.com) where I have read reports of pilots using this over boost, the engine poured smoke, vibration and noise, and its powerful thrust increase could be felt at the cost of maintenance and lifetime.
Last edited by jf1981; 01-07-2012 at 09:41 PM.
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