The Slingsby T.59 Kestrel is a British Open class glider which first flew in August 1970. Of fibreglass construction, it features camber-changing flaps, airbrakes, and a retractable main wheel.Originally a licensed built version of the Glasflügel 401, the Kestrel was produced in several variants culminating in the T.59H of 22 metres (72.2 ft) wing span. The type was successful when used in gliding competitions and was the first glider to complete a 1,000 km (621 mi) pre-declared task.