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Re: [Phys-L] Impossible vehicles.

Here's the directly upwind version of a similar vehicle

On Wednesday, June 2, 2021, 01:09:42 PM CDT, Brian Whatcott <> wrote:

I know of two vehicles that give rise to invective from physics professors: The sand-yacht that rolls directly down wind at twice the speed of the wind

Couldn't find a video of a toy boat with a big air propeller driving a small water prop directly upwind.But they exist!
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