An anonymous reader writes to mention Boeing has successfully completed tests for the engine that will power HALE, the new prop plane that will be able to stay aloft for long periods of time. "The wünderengine, developed by the Ford Motor Company, went for three days under the simulated conditions of a 65,000-feet flight, which is definitely better than a Taurus and apparently exceeded their expectations on fuel economy. Chris Haddox at Boeing's Advanced Systems said that while it will be several years before HALE flies, the key to this aircraft is the propulsion system and this recent test was very promising."
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