Boat plans: boat plans from 36 designers and counting. sail, row, power, paddle—we are sure you will find the perfect boat.. Articles, columns, and homebuilding projects. by and for backyard boat builders.. Scot domergue, designer/builder; firstname.lastname@example.org . marsh duck: length: 18 feet (+ rudder) beam: 42 inches (hull; wings extend to 54 inches.