Quote:
Originally Posted by Blackdog_kt
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Important: Interestingly enough, since +9lbs is only to be used for takeoff when the outboard tanks are full, only these outboard tanks carry 100 octane fuel
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Are you sure BD?
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http://en.wikipedia.org/wiki/Aircraf...tle_of_Britain
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100 octane aviation fuel
As early as 1938 Roy Fedden, who designed most of the Bristol Engine Company's most successful aero engines, pressed for the introduction of 100 octane aviation spirit from the USA.[23] During 1938 the British aero engine manufacturers Bristol and Rolls-Royce demonstrated variants of their 'Mercury' and 'Merlin' engines rated for 100 octane fuel[24][25]
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Notes
1. ^ In September 1939 Bristol Blenheim Mk IVs of several squadrons of Bomber Command (18, 21, 57, 82, 90, 101, 107, 110, 114 and 139 Squadrons) were being converted to use Bristol Mercury XVs and to carry additional fuel tanks for 100 octane fuel in their outer wings. This work was completed by 7 October.[29]
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and
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http://en.wikipedia.org/wiki/Bristol_Mercury
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Mercury XV
(193
825 hp, developed from Mercury VIII. Converted to run on 100 Octane fuel (previously 87 Octane).
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Could it have run on 87 as well?