The Akaflieg Braunschweig SB-7 Nimbus is a Standard class glider designed and built in Germany in the 1960s.
The Eppler wing profile was replaced by one of Wortmann FX-61-163 form, the span increased to 17.0 m (55 ft 9 in), the tail and fuselage geometry revised.
[6] Another SB-7 was built by Paul Kummer and Oscar Weisendanger in Switzerland which had yet another new wing of span of 16.52 m (54 ft 2 in), an aspect ratio of 20.85 and a different Eppler profile, 417 rather than the original 306.
Despite its newness and difficult handling, Rolf Kuntz flew the Nimbus into second place at the 1962 German National Championships, held at Freiburg im Breisgau.
[7] Because of its retractable undercarriage the 15 m span SB-7 had to compete in the Open, rather than Standard class at the 1963 World Gliding Championships, held at Junin in Argentina, flown again by Kuntz.
[8] It also competed in the German Nationals held at Roth in 1966, this time in the Standard class and flown by Eckhard Möllendorf.