Airplanes deploy revers thrusters when landing which are basically just shaped metal shields that move into place behind the engines to provide reverse thrust and slow the plane.

But adding a fan on a sailboat is seen as stupid and doesn't work.

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[–] 2 points 3 weeks ago

A sail boat isn't really pushed by the wind. The sail acts more like a wing and the difference in air pressure going around it is what actually moves the boat.

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