1 sheet + is an attempt to make a nice looking, good performing small boat out of a single sheet of plywood. with a 30" beam and a length of 88", the boat achieves 4 mph with a trolling motor. of course it can be rowed and paddled too. costing about $100 to construct, and capable of a 6 foot 190 pound occupant, it can be many things to many people.. Plans to build the 15′ glousterman ultralight dory. the glousterman was designed as a very light, car toppable rowing craft that would pull well and be safe to row in rougher water.. For those who would like to build their own boat, common sense is the most important criteria. you want the most boat, in terms of accommodations and performance, for the money, time and effort spent building..