Above the Alps aerial mountain view from a Duo Discuss glider in flight. The Schempp-Hirth Duo Discus is a high performance two seat glider often used for advanced training. The Duo Discus is primarily designed for fast cross-country flying including gliding competitions. Schempp-Hirth has produced over 500 Duo Discus gliders since 1993. Send your glider cockpit mountain photos while cross country flying to Baden Aviation today!