Pop flew a B17, 30 missions over Europe 12/24/43 to 6/6/44 (d-day). Even WW1 planes were capable of 6 g turns. A 47 in a dive coud probably exceed 600 mph.
Covering would be dependant on whether the structure was foldable or rigid. One thing that comes into mind is boat wrap for a rigid structure. For a floding structure some form of canvas or convertible top material.
regards
mech
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