SPACE.com -- Helios Robot Aircraft to Attempt Flight Today

The blue squares on top of the Helios Prototype's 247-foot-long wing hold 64,000 solar cells fabricated by SunPower of Sunnyvale, California. Seventy-five percent of the captured solar power is wasted. Harnessing this lost energy with proton exchange membrane fuel cells will be the next step in the unmanned aircraft's evolution. Click to enlarge.

Helios Wing to Shoot for High-Altitude Test in August

Helios Soars Over Hawaii

Robot Aircraft Shoots for Altitude Record

Helios Prototype Aces Last California Test Flight


	Helios Robot Aircraft to Attempt Flight Today *By SPACE.com* Staff** posted: 05:45 pm ET 12 August 2001

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