I would think the forces from the water pushing outwards on the bedsides, tailgate, and bulkhead could do some damage as well. It is greatest at the bottom of the water depth and decreases as you get to the top, but it could be significant and it's possible it would bust some spot welds too.

What if it's a U-Haul pickup?

My vote is for the Aerocar. Its a road legal car that turns into a plane and its from the 1950s

Dornier Do-X because I have a soft spot for flying boats. Plus it screams "MOAR ENGINES" — 12 radials later replaced by 12 inline 12's. Yep.

I LOVE the Beechcraft Starship (top). Too bad they failed to sell.

Anytime you have a plane that has NO windows, you got something truly odd looking. It is also deceptively big. without a reference point is is hard to tell how truly massive this plane is.

I think they made 4 (production?). better looking then Airbus's thing and the super guppy, but still very odd to see in the skies here in seattle/everett

The flying banana. Looked like someone stepped on the preproduction model and they just went ' fuck it...it'll still fly'

The Dornier DO-X has to be up there

Because two propellers are better than one. Note: only one Do 335 survives today and you can see it at the National Air and Space Museum annex outside of Dulles. Its an elegant monster, not unlike the A-10.

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I'm not sure about weirdest, but I imagine the development of the A-1o Thunderbolt went something like this...

Any of the Ekranoplanes

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Dornier Seastar - boat plane with push-pull turbo prop engines.

Since my last was a prototype, how about this little gem

The asymmetrical (but completely airworthy ) Blohm und Voss BV 141.

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