Kestrel

The Open Class was quite neglected by glider pilots in Germany between 1970 and 1980. God and the World flew plastic gliders of the standard class and then from 1976 there was a strong influx for the new 15 metre class. The Open remained somewhat behind in numbers. This can also be clearly seen at championships. First and foremost, the price of the large ships may be to blame for this development, but in many places it is probably also a question of hangarage, the problem of the launch possibility (only winch) and simply the handling on the ground.
But now there are very sought after aircraft with a wingspan of more than 15 metres, and the Kestrel must be counted among them.

The Kestrel, whose name comes from English and means ” Turmfalke” in German, was originally designed as a further development of the H-301 Libelle. However, it has almost nothing in common with it, rather the Kestrel is a fundamentally new construction, for which mainly Josef Prasser and Dieter Althaus were responsible. Like the fs-25, the fuselage with its relatively strong constriction is influenced by wind tunnel investigations carried out by members of Akaflieg Stuttgart. The vertical stabilizer has a new Wortmann profile. The horizontal stabilizer with a span of 2.85 m is mass balanced. The wing has a Wortmann profile.

The cockpit of the Kestrel is quite spacious, the rear part of the canopy folds up for entry. Schempp-Hirth airbrakes on the upper side of the wing serve as landing aids in conjunction with the landing position of the flaps. In addition, a brake parachute is installed.
The first flight took place on 9 August 1968 in Karlsruhe-Forchheim.
A total of 129 Kestrels were built at Glasflügel. Under license, the Slingsby company in England also built first the 17 m version, then mainly a 19 m Kestrel with the designation T59D.