19 hydroplane boat plans, instant access download! simple easy to build small inboard and outboard boat plans. perfect for the backyard boat building enthusiast.. Free motorboat plans for the backyard home builder, build your own speed boat, cabin cruiser, runabout or utility boat using these simple plywood designs.. Build a row boat, sail boat, power boat combo . we have two plans for a small boats that can be a sail boat, row boat or outboard powered. designed for the man who.