Monday February 20, 2017


Ultra-Long-Endurance Aircraft to Stay Aloft for Years
  Posted by: Digg on Apr 25th, 2008 12:25 AM
Boeing has unveiled concept art for an ultra-long-endurance aircraft that could stay aloft in the stratosphere for several years. Boeing has received a $3.8m (£2m) Defense Advanced Research Projects Agency (Darpa) contract for Phase 1 of the Vulture programme.

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