Sail and power catamaran plans, designed for plywood/epoxy/fiberglass construction. online study plans.. This design (plan) is a 28 ft aluminum catamaran. power is two (2) 115 honda outboards. at 8,466 lbs displacement with 100 gallons of fuel, the catamaran achieved 28. Build the unsinkable boat build the wizcat 130 pontoon deck boat for under $500.