The ST was designed to comply with the Fédération Aéronautique Internationale microlight category, including the category's maximum gross weight of 4500NaN0. The aircraft has a maximum gross weight of 4500NaN0.[1]
The aircraft design features a strut-braced topless hang glider-style high-wing, weight-shift controls, a two-seats-in-tandem open cockpit with a cockpit fairing, tricycle landing gear with wheel pants and a single engine in pusher configuration.[1]
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 10.381NaN1 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 640NaN0 Rotax 582 engine or four cylinder, air and liquid-cooled, four-stroke, dual-ignition 800NaN0 Rotax 912UL engine.[1]
The Rotax 582-equipped model has an empty weight of 1980NaN0 and a gross weight of 4500NaN0, giving a useful load of 2520NaN0. With full fuel of the payload is 2090NaN0.[1]