Igor I. Sikorsky Human Powered Helicopter Competition AeroVelo's Atlas human-powered helicopter conducted a flight that met all the requirements of the AHS International competition, and received the $250,000 prize. In the history of the prize, dozens of teams have designed and built human-powered helicopters, although few have made it airborne. The AHS competition was named in honor of Igor Sikorsky, one of the founders of the technical society. AHS initiated the prize purse at $25,000, but later raised it to $250,000. The first HPH to get off the ground was the "Da Vinci III" in 1989, designed and built by students at Cal Poly San Luis Obispo
Sikorsky S-9 completion the S-9 was found to be substantially heavier than anticipated and the engine only delivered 80% of its rated horsepower. Initial flight tests revealed very poor performance. The engine was replaced by a Gnome Monosoupape and further flights showed only a nominal increase in speed. The machine was eventually scrapped. Sikorsky S-9 The Sikorsky S-9 "Kruglyj" (Rounded One) was a Russian single engine prototype aircraft completed in the spring of 1913 by the Russian Baltic Railroad Car Works while Igor Sikorsky was the chief engineer of the aircraft manufacturing division. The S-9 was a three-seat mid-wing monoplane with constant-chord