Igor I. Sikorsky Human Powered Helicopter Competition
|Aerial view taken soon after the first flight of AeroVelo's Atlas human-powered helicopter|
|Designer||Todd Reichert and Cameron Robertson|
|First flight||August 28, 2012|
The Igor I. Sikorsky Human Powered Helicopter Competition was established in 1980 by the American Helicopter Society (AHS) International. The award, the AHS Sikorsky Prize, was given for the first human powered helicopter (HPH) to meet a set of extremely challenging flight requirements. In summary, the requirements to win the AHS Sikorsky Prize included a flight duration of 60 seconds and reaching an altitude of 3 meters (9.8 ft), with the center point of the aircraft hovering over a 10-by-10 meter (32.8-by-32.8 ft) square. 
In 2013, 33 years after the competition was established, the award was officially declared won when 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 only five of them made it airborne.
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 in California, USA. It flew for 7.1 seconds and reached a height of 8 inches (20 cm). The second was the Yuri I in 1994, designed and built by students at Nihon University in Japan. It flew for 19.46 seconds and reached an altitude of 20 cm.
With no human-powered helicopter getting off the ground since 1994, in 2009 Sikorsky Aircraft Corporation pledged to AHS International an increase in the size of the remuneration to $250,000, which significantly increased interest in the competition. It resulted in a new generation of human-powered helicopter teams, with two—one the University of Maryland and the other AeroVelo—in a "tight battle" to win.
Students at the University of Maryland designed and built the Gamera I. The Gamera I successfully flew on May 12, 2011 for approximately four seconds, soon followed by a flight of 11 seconds. In November 2011 construction began on the improved Gamera II. On June 21, 2012, the Gamera II flew for a duration of 50 seconds. Additional tests of Gamera IIXR with a larger cruciform and longer rotors on August 28, 2012 yielded official world records of 65 seconds endurance on one flight and 8 ft altitude on another – the first "high altitude" flight of a human powered helicopter in history, and the first of the individual requirements to fall.
On June 24, 2012, the NTS Works Upturn human-powered helicopter also successfully flew for 10 seconds, climbing to about 2 ft (0.6 m). NTS Works later donated the aircraft to the California Polytechnic State University which is developing it as the Upturn II. 
On 13 June 2013, AeroVelo flew its Atlas HPH and submitted data from the flight to the AHS International Human Powered Helicopter Competition Committee. After the panel of vertical flight technical experts reviewed the data from the flight, AHS International announced that the flight had met the requirements of the competition and that AeroVelo had officially won.
During the 13 June 2013 flight, occurring at 12:43PM EDT, the team managed to keep Atlas in the air for 64.11 seconds, reach a peak altitude of 3.3 meters and drift no more than 9.8 meters from the starting point.
- AHS International, Human Powered Helicopter Regulations, retrieved July 12, 2013.
- "AeroVelo Team Wins AHS International’s 33-Year-Old Igor I. Sikorsky Human Powered Helicopter Competition". AHS International. July 11, 2013.
- Hirschberg, Mike, Vertiflite, "Human Powered Helicopters Rise Higher", November-December, 2012. Retrieved July 12, 2013.
- Jason Paur (July 11, 2013). "Canadian Team Claims $250,000 Prize for Human-Powered Helicopter". Wired. Retrieved July 11, 2013.
- Hirschberg, Mike, Vertiflite, "Human Powered Helicopters Take-Off", July-August, 2012
- "Press Release, A. James Clark School of Engineering, University of Maryland". Eng.umd.edu. May 11, 2011. Retrieved October 18, 2012.
- "Gamera takes off but fails to bag Sikorsky Prize". Ibtimes.com. May 13, 2011. Retrieved October 18, 2012.
- "Gamera Team Sets New Unofficial World Record for Human-Powered Helicopter Flight". Agrc.umd.edu. June 23, 2012. Retrieved October 18, 2012.
- AHS International, Gamera team continues setting records, August 28, 2012. Retrieved July 12, 2013.
- "Upturn Human Powered Helicopter Flies!". Vtol.org. Retrieved October 18, 2012.
- "AHS Congratulates AeroVelo for Human Powered Helicopter First Flight!". AHS International. August 28, 2012. Retrieved October 18, 2012.
- "U of T engineers make history with first human-powered helicopter". ctvnews.ca. July 11, 2013.
- "AeroVelo Officially Awarded AHS Sikorsky Prize!". aerovelo.com. July 11, 2013.
- Igor I. Sikorsky Human Powered Helicopter Competition – AHS International
- humanpoweredhelicopters.org – lists attempts to win the AHS Prize