Quote:
Originally Posted by Crumpp
The maximum boost is only +12lbs at sea level in emergency override in the Spitfire Mk I.
That is all the Merlin II and III were capable of handling and that was a definite over boosting of the engine.
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The Merlin III was capable of handling 16lb boost:
and the Sea Hurricane IC used 16lb boost in combat, but not in 1940.