Sunward STB

The Sunward STB is a Chinese amphibious ultralight trike, designed and produced by Sunward Tech (Hunan Sunward Science & Technologies Company Limited) of Zhuzhou. The aircraft is supplied complete and ready-to-fly.
Design and development.
The STB is intended for the search and rescue role, as well as tourist flights and recreational use. It was designed to comply with the Fédération Aéronautique Internationale microlight category, including the category's maximum gross weight of . The aircraft has a maximum gross weight of .
The aircraft design features a strut-braced hang glider-style high-wing, weight-shift controls, a two-seats-in-tandem open cockpit with a rigid boat hull, retractable tricycle landing gear and a single engine in pusher configuration. The boat hull was designed for use in higher wave conditions.
The aircraft is made from bolted-together aluminum tubing and composites. It uses a double surface Grif Hazard wing, made by the Italian company Grif Italia. The span wing is supported by struts and uses an "A" frame weight-shift control bar. The powerplant is an Austrian-made twin cylinder, liquid-cooled, two-stroke, dual-ignition Rotax 582 engine or four cylinder, air and liquid-cooled, four-stroke, dual-ignition Rotax 912UL engine.
The aircraft has an empty weight of and a gross weight of , giving a useful load of . With full fuel of the payload is .