[1][2] The Medium was designed for flight training and passenger flights and is made from aluminum tubing, with the single-surface wing covered in 4 oz Dacron sailcloth.
Its 10.8 m (35.4 ft) span wing is cable braced from a single kingpost.
The nose angle is 124°, wing area is 20.8 m2 (224 sq ft) and the aspect ratio is 5.7:1.
Pilot hook-in weight range is 100 to 170 kg (220 to 375 lb).
[1] The sole model, the Medium 21, is named for its rough wing area in square metres.