Quote:
Originally Posted by Crumpp
Read above it.....
"rpm limitations are directly associated with similar limitations on boost pressures also defined in relation to the operational condition".........
(vi) It may only be exceeded momentarily during aerobatics, fighting manoeuvers, or when diving.
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This is a training manual from 1937 and is general to all aircraft types of the time, so what it has to do with Merlin engines with 100 octane and +12lbs boost in 1940 is anybody's guess. Anyway I'd really like to see the anecdotes - and I note the word anecdotes - about the +16 lbs on 87 Octane...