Inaccurate performance data for BOB fighters in COD comparing to RL data

[NZtyphoon]

Originally Posted by Kurfürst

Hmm, I wonder if its the case that both versions are correct - all Blenheims seem to have had 100 octane as a general rule apart from 87 octane in the inbord engines, but some Blenheim Squadron Stations of No. 2 Group were a bit more 'more equal' and were supplied with 100 octane only, while 87 octane was removed from thesestations - and consequently, could only fill 100 octane in both inner and outer tanks of their Blenheims.

See attached papers David has posted a while ago and compared them to the April note by Mike above. It would also mean that Blenheims consumed far more than originally thought.

Fair enough: Assuming all Blenheims used 100 octane (six Blenheim units may have used 100 octane in all tanks)

Wyton:
XV
40

Watton:
82

Wattisham:
107

West Raynham:
101

Blenheim = 479 imp gals
Defiant= 97
Hurricane = 90
Spitfire = 85
Total= 751 divided by 4 = 187.75

1 ton 100 octane = 315.5 divided by 187.75 = 1.7 fuel loads

"Please note that the 10,000 tons of 100 octane, shown in Table II - Consumption consumed for the period June - Aug 1940, is the monthly average of those 3 months, therefore for the period June - Aug 1940 30,000 tons were actually consumed." (Lane#31

June to August 30,000 tons 100 octane consumed x 1.7 = 51,000 fuel loads divide by 92 days = 554.3 fuel loads per day

Sept 14,000 tons 100 octane x 1.7 = 23,800 divided by 30 days = 793.3 fuel loads per day

Oct 17,000 x 1.7 = 28,900 divided by 31 = 932.2 fuel loads per day

June to Oct = 61,000 tons consumed x 1.7 = 103,700 divide by 153 = 677.7 fuel loads per day consumed on average.

51,364 sorties, day & night from July 10 through Sept 30; some of the most intensive combat took place between these dates. Of course there were quiet periods when far fewer combat sorties were flown by Fighter Command; eg: August 16 & 17, between two days of intensive combat August 15 & 18.

51,364 divided by 13 weeks = 4,280 fuel loads = 611 fuel loads daily
average:

Even with all Blenheims theoretically using 100 octane fuel, there was still more than enough being 100 octane fuel being consumed - not issued - from June through end of October to supply 100% of FC, and some BC, operations. Once again this is also assuming all aircraft landed with empty tanks and had to be completely refueled, rather than being topped up.