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!. A guide to timber boat plans. is it your dream to own your own boat? imagine for a moment that it is actually a reality, and you can take it out to the lake on a. 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:.