The ST 87 Vega features a cantilever low-wing, a two-seats-in-side-by-side configuration enclosed cockpit under a bubble canopy, fixed conventional landing gear with wheel pants and a single engine in tractor configuration.
The aircraft is made from wood, with its flying surfaces covered in doped aircraft fabric. Its 7.621NaN1 span wing mounts flaps and has a wing area of 10m2. The cabin width is 110cm (40inches). The acceptable power range is 85to and the standard engine used is the 1080NaN0 Lycoming O-235 powerplant.
The ST 87 Vega has a typical empty weight of 4690NaN0 and a gross weight of 7260NaN0, giving a useful load of 257kg (567lb). With full fuel of the payload for the pilot, passenger and baggage is 175kg (386lb).
The manufacturer estimates the construction time from the supplied kit as 2000 hours.
By 1998 the company reported that four kits had been sold and two aircraft were completed and flying.