General Atomics, one of three companies vying for the U.S. Navy’s MQ-25A Stingray unmanned refueling tanker competition, has completed its fourth wind tunnel test, the company says. The design’s high-lift system and spoiler-based direct lift control were tested in a flow-through duct, the company announced July 31. The results were consistent with computational fluid dynamics predictions. Boeing and Lockheed Martin also are competing for the lucrative MQ-25A contract, and the ...


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