During its transatlantic flight to England, the aircrew discovered that the B-17G

During its transatlantic flight to England, the aircrew discovered that the B-17G, “5 Grand,” was approximately 7 mph slower in cruise than a standard B-17G. This is thought to be because of the amount of paint used by the 35,000 signatures!
https://planehistoria.com/b-17-5-grand/

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