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Old 05-14-2012, 09:28 PM
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Crumpp Crumpp is offline
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Quote:
Yep it is also interesting
I thought something like this might be discovered when I saw the 1937 instructions for boost cut out in the RAF Training Manual......

Last edited by Crumpp; 05-14-2012 at 10:08 PM. Reason: it was the 1937 RAF Training Manual not General Operating Notes