This small boat design is for a simple but very practical dinghy, based on a reliable pram built several years ago. purchase your dinghy building plans!. Wooden boat plans for amateur boatbuilders – excellent performance, simple construction, step by step instructions australia, usa, uk, hungary, s. africa. How to build a small sail boat. these plans are for a small sail boat called the biloxi dinghy. former builders claim it’s a great design.s. from the plans:.