The graphic will be updated to include the 1908 occurrence of a full cable-stayed triangle control frame as we know it today. |
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1908 ...a full 100 years ago hang gliding had the cable-stayed triangle control frame as we know it today. Later, after 1921's Gottlob Espenlaub's triangle control frame, we received gifts emphatically from George Spratt when he fully instructed the triangle control frame. Later decades in kites, kite aerial photography, 1961-2 Palmer on his final version, ski flat kites and finally again Rogallo kiting used the same TCF. |