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. https://blog.seattlepi.com/americanaerospace/2019/01/04/x-aircraft-one-upmanship/
blog article
X-AIRCRAFT ONE-UPMANSHIP
Seventy years ago this week, the USAF/Bell XS-1 became the first aircraft of any type to achieve supersonic flight during a climb from a ground take-off. The daring feat took place at Muroc Air Force Base with USAF Captain Charles E. “Chuck” Yeager at the controls of the rocket-powered XS-1. READ MORE