Small US aerospace project Helios Horizon claims to have recently broken the record for the highest-flying multi-seat electric aircraft, which it considers a step on its journey into the stratosphere.

Earth is clearly discernible. The air is so thin–only 1.4 percent of the density at sea level–it is incapable of supporting life. It is also incapable of supporting sustained horizontal flight of an ...

The Helios Horizon, an electric powered experimental aircraft flown by Sarasota-based test pilot and engineer Miguel Iturmendi, captured two world records for aircraft lighter than 500 kilos on June 2 ...

Electrical energy from a fuel-cell based system set to drive flying wing for at least 40h NASA is to attempt a record-breaking 40h flight of its Helios prototype flying wing powered by a newly ...

A June 7 shakedown flight of NASA's solar-powered Helios unmanned aerial vehicle (UAV) ended three hours earlier than planned after flight controllers detected a problem with the aircraft's electric ...

Computer “hiccups” grounded the Helios Prototype solar-powered wing aircraft, which has seen its scheduled first functional check flight pushed back by more than a month now. Originally penciled in ...

HONOLULU (AP) - Investigators say too little analysis and an inappropriate decision led to the destruction of the 15 (m) million dollar Helios unmanned aircraft over waters off Kauai more than a year ...