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Re: DB601A-2
RT,
One of the defining characteristics of the E-7 was its ability to remain airborne for longer periods thanks to a revised fuel delivery system brought about by the addition of a 300 litre drop tank. It is possible an A-2 engine was somehow modified from the A-1 so as to operate more efficiently with this fuel system change. It might have had something to do with making certain the engine ran smoothly when fuel tank switch-over occured.
Hal
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