By Tern Update. Tern, an unmanned, tail-sitting, flying-wing aircraft being developed by DARPA and the Office of Naval Research, has made “significant advances on numerous fronts” since last year, according to DARPA. The program has begun wing fabrication, opened a software integration test station, finished testing a modified General Electric engine for its first test vehicle and asked prime contractor Northrop Grumman to build a second test vehicle, the agency says. In addition, a 1/5th-scale model is undergoing wind-tunnel testing at…
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