A video released Feb. 8, 2013, by Jetman Yves Rossy suggests the skydiving innovator may be on the verge of marketing an unpowered version of his strapped-on wing and opening a school to teach people how to fly it. Rossy has piloted another version of the wing with four micro-turbines attached to its underside delivering power. He has flown that version across the English Channel and a section of the Grand Canyon. Rossy describes the unpowered version by saying it can achieve a "glide angle" of 4.5. English is not Rossy's first language and a glide angle of 4.5 would translate to a glide ratio of roughly 13:1 -- substantially better than a Cessna 172. It's possible that Rossy's use of the term instead indicates the wing's glide ratio. Rossy says he's flown his gliding wing in excess of 150 mph, he has demonstrated aerobatics while flying it and believes there is much more potential for his unique brand of flight. Rossy is meticulous in his flight preparations, studying terrain, angles of flight and walking portions of the route when able. It is not yet known if his apparently proposed school will train the same pre-flight planning.