Quote:
Originally Posted by robtek
That says that the Spitfire conversion was done at 31st july,
The start of the BoB was at the 10th of July (Channel Battles) with the preparations for Seeloewe by decimating the fighter force.
British historians see a different beginning date in august with the beginning of large day bombing raids.
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No, it says on July 31st there were 384 Spitfires in 19 squadrons (every Spitfire squadron in RAF FC) flying with 100 octane fuel. These aircraft were converted to 100 octane well before that date, unless you somehow believe that they were all converted on the same day! The article quoted states:
Bulk supply contracts for higher octane fuel were placed by the Air Ministry and it was put into widespread use in the RAF in March 1940 when Spitfires' Rolls Royce Merlin engines were converted to use the 100 octane fuel.