SPACE reports, “NASA’s new X-59 supersonic jet is a step closer to flight after passing an important ground test in March. Known as “engine speed hold,” the test ensured that the X-59 can maintain a specific speed when it flies for the first time later this year. “Engine speed hold is essentially the aircraft’s version of cruise control,” Paul Dees, NASA’s X-59 deputy propulsion lead at Armstrong Flight Research Center in California, said in a statement. “The pilot engages speed hold at their current speed, then can adjust it incrementally up or down as needed.”
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