“The Shannon 38 SRD hull is a breakthrough hybrid design that incorporates the speed potential of deep Vee planing hulls with the fuel economy of displacement hulls. I was able to design the hull shape over a four year period using sophisticated computer generated CAD software that was developed for the air and space industry. The goal of the design was to finally overcome the one gallon of fuel burned for one mile of speed limitations found in other conventional hull shapes. While there are many outrageous claims of fuel economy, range and speed in the boat industry, owners quickly find out that there is a big gap between advertising and real use. The SRD actually goes almost two miles for each gallon of fuel in real world testing at speeds normally found in semi-displacement or planing hulls. The 38 SRD has a top speed of 25 mph and cruises economically at 18 mph with only twin 150 hp diesels. A conventional hull design, including the other powerboats that I have designed over the pa