Robert F. Bach
Flex-Wing Hang Glider Gold Air Award

• "Flying Wing" Kite   US2463135     Filing date May 29, 1947    There is no evidence of Bach knowing of the fully limp Rogallo wing at the time of the filing.
   
• Discuss with https://www.google.com/patents/US2537560 of George D. Wanner of filing date Jan 29, 1948.
   
• Discuss with Rogallo Filing date Nov 23, 1948   uniquely realizes fully-limp wing that may be stiffened. Note Wanner and Bach did not know of fully-limp wing, apparently.  US2546078    Flexible kite.  Boom stiffening would deposit the Wanner and Bach; with eyes of Rogallo, the Rogallo wing lives within boom-stiffened wings.   It was synergistic Rogallo leadership that brought a four-boom bi-conical hang glider kite to the high front of media and use; the new understanding and trust of the fully limp Rogallo wing let boom-stiffened sailed wing be seen in a new light; that Rogallo carried that light to others at a time of need to face Sputnik-changed world is what let the Rogallo Revolution occur.  One may reach a four-boom hang glider from Lee & Darrah, Bach, and Wanner sans Rogallo; some did; but the vast large majority of four-boom hang gliders came from the Rogallo leadership flow as clearly marked in the literature. John Worth  used the early W. Simon (1908) triangle control frame in hang gliders; the same was found in later kite hang gliders on up to present time.
   
• Discuss with William M. Allison https://www.google.com/patents/US2737360     Filed: Sep. 8, 1950.
   
• Discuss with the many patents on flexible wings of three and four booms up through July 29, 1963.
• Discuss with https://www.google.com/patents/US3153877 from Effinger and Struck of filing date Nov 14, 1962
   
• Discuss with Russell Hall  US3250500  Filing date Mar 23, 1964