 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 .NTS Works later donated the aircraft to the California Polytechnic State University which is developing it as the Upturn II.