What wind speed is required to Flip A Keeled Sailboat?

Answer 1

Generally speaking wind is not the only ingredient in a full capsize, a boat may be heeled over perhaps to a point where the mast may almost touch the water, at this point the force of right moment in the weight of the keel takes over to keep it from capsizing, also as the mast goes farther over the wind begins to spill off the top of the mast, reducing the forces on the mast and tendancy for a complete capsize. Large waves, especially breaking waves will have more of an effect on flipping a keeled sailboat that perhaps becoming beam or sideways to the waves .