A 1933 9m span experimental glider, Burnelli-style wing with endplates The BS-09 Bertina II was a 1933 9.28 m span single-seat experimental glider |
A 1933 9m span experimental glider, Burnelli-style wing with endplates The BS-09 Bertina II was a 1933 9.28 m span single-seat experimental glider |