The Briegleb BG-7 is an American strut-braced high-wing, single seat glider that was designed by William G. Briegleb and produced by the Sailplane Corporation of America as a completed aircraft and also as a kit.
[1][2] The BG-7 wing is made from wood structure, with two spars and covered in doped aircraft fabric.
The longer wing created stability issues and many aircraft were subsequently modified by either lengthening the tail to increase the tail arm or enlarging the vertical fin.
[2][3][4] In 1952 Betsy Woodward Proudfit, flying a BG-7, set the feminine speed record for the 100 km (62 mi) triangle, at 28.64 mph (46.09 km/h).
[4] Data from Sailplane Directory and Soaring[1][2]General characteristics Performance