Is it the apparent wind created by forward momentum? Is it possible to go downwind faster than the wind speed?
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I’m not sure I saw a good answer to this.
But first, most sailboats don’t travel faster than the wind, since the boat and keel have friction against the water.
However, with the right design, you can make a boat to hydroplane against the water while the sails act like wings, pulling the boat.
So, if you can get near frictionless and have a good wing, you can surf the boat.
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