Quote:
Originally Posted by Blackdog_kt
Yup, that's what the pilot's handbook says for the Mk.IV.
100 octane only when the long range outer tanks are needed for take off and cruise to target, 87 octane in the inner tanks for all other cases (return from target on long range missions, or the entire mission in case of short range hops).
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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.