World Championships 1987, Marek Szufa flying Kobuz-3 in Bielsko

1987 video, Marek Szufa is flying SZD-21 Kobuz 3, representing Poland during 1987 Glider Aerobatic World Championships in Bielsko-Biala. Jerzy Makula (7 times world champion), Krzysztof Wyskiel, Andrzej Tomkowicz and Józef Solski are also on this video.
Glider SZD-21 Kobuz-3 story, specifications, photos:
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Andrzej Tomkowicz parachuted from Kobuz when the wings failed during training flight in 1989. Krzysztof Wyskiel was killed when the wings failed in 1991 at the world glider aerobatic championships at Hockenheim in Germany . SZD glider factory test pilot Sławomir Makaruk was killed when Kobuz broke up in flight during flutter testing in 1963. More about Marek Szufa here www.google.com...