The ASK 21 is a modern two-seater glider that bridge the gap between initial training and single-seat glider. It was produce by Alexender Schleicher and first flew in 1979. It features a safety cockpit in double wall GRP honeycomb design. This robust sandwich construction not only offers an unrivaled degree of pilot protection and passive safety but also minimizes the weight of structural components.

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For ASC, this is the glider where you transition from student to pilot.