Aviation and inventions
Baden-Powell became a Fellow and later President of the Royal Aeronautical Society and a Fellow of the Royal Geographical Society (elected in 1891). He also wrote, "Ballooning as a Sport", published in 1907 by William Blackwood and Sons.
With his sister Agnes , they built and flew in their own hot-air balloons, man-carrying kites, gliders and powered aircraft.
He invented a twelve-foot man-carrying kite that he flew at Whitton Park, Hounslow, England, and later a three-kite system that he called the Levitor. He helped Marconi in Newfoundland in his efforts to transmit and receive radio messages across the Atlantic, using Baden-Powell's man-carrying kite to lift the radio aerial.
He also developed a collapsible military bicycle.
He obtained one of the first British patents for a television system, "An electrical method of reproducing distant scenes visually", published 19 April 1921 (GB161706).
He contributed to the Encyclopædia Britannica Eleventh Edition entry on 'kite-flying'.