High Quality Content by WIKIPEDIA articles! The Schweizer SGS 1-21 is a United States single-seat, mid-wing, Open Class glider built by Schweizer Aircraft of Elmira, New York. The 1-21 was a clean-sheet design intended to fill the role of high performance competition sailplane. It was designed by Ernest Schweizer and first announced in the September-October 1946 issue of the Soaring Society of America's Soaring magazine. Following World War II soaring in the United states was dominated by surplus two-place gliders that had been used as trainers by the military, such as the TG-1, TG-2 and TG-3.

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