This is another easy start for boatbuilding. a very simple 7’4" x 3’10" dinghy, made out of simple materials, using a simple construction method and just the basic tools.. Welcome to absolutely free plans, in this section you will find free boat building plans including accessories and construction folding dinghy; frosty dinghy. We have dinghy boat plans for dinghies up to 12′, most of which can be used with oars, sail, or small outboards. find dinghy sailboat plans at bateau!.