The board that investigated the loss of the remotely operated Helios Prototype aircraft determined the mishap resulted from the inability to predict the aircraft's increased sensitivity to ...

destroyed when it crashed into the Pacific Ocean, June 26. Helios, a proof-of-concept solar-electric flying wing, was designed to operate at extremely high altitudes for long duration. It crashed ...

The unmanned Helios solar-powered aircraft prototype reached the record-setting altitude of 96,500 feet in a 17-hour flight from the Hawaiian island of Kauai. The flight, according to backers of the ...

Technicians are preparing the flying-wing, solar-powered plane Helios for another test flight. If Westside weather and all the technical aspects of the Helios prototype are ready the flight is ...