Displacement boats, like Frank, rely on the length of hull in the water to counterbalance the wind in the sails & generate movement through the sea. Planing boats use forwards momentum through the water to lift the hull dynamically out of the water, reducing resistance and increasing speed with a direct transfer of wind power from the sails to the boat’s direction.

So a displacement boat has a speed limiter. Its length of hull in the water determines the max amount of wind power that it can convert into movement.

Great job by Philippe Delamare: he “has sailed only 800 Nautical miles in excess of the theoretical route with a “wastage” of just 3.2%”

https://globalsolochallenge.com/100-days-everest/