Quote:
Originally Posted by Crumpp
Nonsense, boost override was and was even tested at service inspection. It was not authorized for use except at take off.
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The Merlin II/III doesn't have a override for take-off, it only has a cut-out for emergency. A override for take-off is linked to extra rich mixture to preventing detonation. The cut-out does not increase mixture, thus requires higher octane fuel to prevent detonation.
Quote:
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"In combat and emergency other considerations may justify the pilot in disregarding these limitations"
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- quoted wrong (it says "restrictions" and not "limitations")
- quoted out of context (the context are time and flight condition limits, not boost limitations)
- quoted comes from a later source (March 1943, thus not related to 1940)
The RAF fanboys would love to see a proof that 87 octane was not required for +12 boost with Merlin engines. No one cares about the type of fuel, it's the +12 boost everyone is interested in.