My back of the envelope calculations show that a 50 ft. boat, with a 10,000 lb displacement, powered by 17 hp would do 10 kts. on one gallon per hour. No violation of the laws of physics at all. A long, thin, light boat would do it. Remember that 8 husky rowers in a racing shell can do 13 kts. over a one mile course. Even if they are in tip top shape they can collectively generate an average of only 6 hp over the duration of the run. Larry Z In a message dated 6/9/06 12:01:21 AM, trawlers-and-trawlering-request@lists.samurai.com writes: > > -----Original Message----- > > From: Mark > > It seems that boat are just stuck in this 1-2 mpg rut. > > > > I'd still like a 10mpg boat at 10 knots ;-) > > > > REPLY > Then you need to examine hull forms other than full displacement mono hulls. > Begin with power cats and workfrom there. > Laws of physics cannot be negated but sometimes there are loop holes. <G> > > Arild