[fb11] this dinghy comes apart for storage! but once assembled, it moves… with oars, sail or outboard.. This is the boats, dories and other watercraft category of information. this free woodworking plans list features an extensive list of free building projects to. Below is a diagram of a 47 sq. ft. sprit for a pram or dinghy. below are some pictures of various sprit sails i’ve constructed ranging from about 33 sq. ft (d4) to.