The Questar XLS was designed to comply with the US FAR 103 Ultralight Vehicles rules, including the category's maximum empty weight of 2540NaN0. The aircraft has a standard empty weight of 2400NaN0.
The aircraft features a strut-braced high-wing, a single-seat open cockpit without a windshield, fixed tricycle landing gear without wheel pants and a single engine in pusher configuration.
The Questar XLS is made from bolted-together 6061-T6 aluminum tubing, with its flying surfaces covered in doped aircraft fabric. Its 31.31NaN1 span wing has a wing area of 146square feet, is supported by "V" struts and the wing can be detached in ten minutes for ground transport or storage. The acceptable power range is 30to and the standard engines used are small 300NaN0 two-stroke powerplants.
The aircraft has a typical empty weight of 240lb and a gross weight of 500lb, giving a useful load of 260lb. With full fuel of the payload for the pilot and baggage is 230lb.
The standard day, sea level, no wind, take off distance with a 300NaN0 engine is 1000NaN0 and the landing roll is 800NaN0.
The manufacturer estimated the construction time from the supplied plans as 200 hours.
By 1998 the company reported that 70 sets of plans had been sold and that 10 aircraft were completed and flying.
