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| | [15.0] The NASA ERAST HALE UAV Program |
 | | The Altus was 7.2 meters (23 feet 7 inches) long, had a wingspan of 16.9 meters (55 feet 4 inches), and a takeoff weight of 725 kilograms (1,600 pounds). |
 | | It had a span of 62.8 meters (206 feet), was powered by twelve electric motors, had four gondolas instead of two, and weighed 630 kilograms (1,385 pounds). |
 | | There was a little disappointment that the UAV did not clear 30,450 meters (100,000 feet), but takeoff of the Helios was postponed by cloud cover, limiting the amount of daylight available for its climb, and the "miss distance" was too small to make the cost of a second altitude attempt worthwhile. |
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