John Letcher got a PhD in Aerodynamics from CalTech in 1966, sailed across the Pacific six times - twice single-handedly in a 20 ft boat, formed...
I've been kicking around the idea of using solar power to drive a catamaran, and I'm interested in more of a coastal cruiser that would sail a few...
If you have a 20 ft beach cat and you scale it up to 40 ft, my first thought was that a boat is mostly surface area so maybe the cost should go up...