8′ puddle duck racer one design racing sailboat based on bolger brick. developmental class, defined hull, unlimited sail rig and underwater fins.. Welcome to absolutely free plans, in this section you will find free boat building plans including accessories and construction techniques. free plans have a tendency. A pontoon boat is a flattish boat that relies on pontoons to float. these pontoons (also called tubes) contain a lot of reserve buoyancy and allow designers to create.