It's always interesting to compare the actual sources with the way they are 'represented' on Mike William's website. Often text is 'rephrased' and relevant parts go 'missing'.
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Originally Posted by zapatista
its like a perpetual ground hog day here
extensive information has been provided on this issue this from various sources in the last year in this forum, it is CONCLUSIVE AND BEYOND ANY DOUBT that hurricanes and spitfires had 100% octane fuel available, and just by your own quoted figures that would give them at least a 14% speed disadvantage
to quote but a few sources
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Gavin Bailey concluded that "The actual authorisation to change over to 100-octane came at the end of February 1940 and was made on the basis of the existing reserve and the estimated continuing rate of importation in the rest of the year." (ref 33). As of 31 March 1940 220,000 tons of 100 octane fuel was held in stock. (ref 34)
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The actual text in this source goes as:
'By the time war broke out, the available stocks of aviation fuel had risen to 153,000 tons of 100-octane and 323,000 tons of other grades (mostly 87-octane).35 The actual authorisation to change over to 100-octane came at the end of February 1940 and was made on the basis of the existing reserve and the estimated continuing rate of importation in the rest of the year.36 The available stock of 100-octane fuel at this point was about 220,000 tons. Actual use of the fuel began after 18 May 1940, when the fighter stations selected for the changeover had completed their deliveries of 100-octane and had consumed their existing stocks of 87-octane. While this was immediately before the intensive air combat associated with the Dunkirk evacuation, where Fighter Command units first directly engaged the Luftwaffe, this can only be regarded as a fortunate coincidence which was contingent upon much earlier decisions to establish, store and distribute sufficient supplies of 100-octane fuel.37
and
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The Co-ordination of Oil Policy Committee noted in the conclusions of their 18 May 1940 meeting with regard to the "Supply of 100 Octane fuel to Blenheim and Fighter Squadrons" that Spitfire and Hurricane units "had now been stocked with the necessary 100 octane fuel". (ref 35) The Committee recorded that actual consumption of 100 octane for the 2nd Quarter 1940 was 18,100 tons. (ref 36)
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Note the very different phrasing used in the original paper.
It does not say that "Spitfire and Hurricane units had now been stocked with the necessary 100 octane fuel"
It says: "satisfaction was expressed that
the Units concerned had now been stocked with the neccesary 100 octane fuel".
I will let the dear readers draw their own conclusions.