第一项始终是图钉的来源。总体可信度是各份资料对上方所用开始和结束时间支持程度的加权平均;资料每比最新的一份旧 180 天,权重减半。
Happened as dated, per nasa.gov[3][4]: the X-59 "marked a major milestone Friday, June 5, when it flew faster than the speed of sound for the first time."
Wikipedia's X-59 article gives the "99.7 ft (30.4 m) long with a 29.5 ft (9.0 m) wingspan" airframe, the GE F414 with 22,000 lbf, the Mach 1.42 cruise at 55,000 ft, the 75 EPNdB thump projection and the forward 4K camera vision system.
NASA’s[1][3] own Quesst mission blog entry for the same milestone, confirming the 5 June 2026 first supersonic flight.
Independent aviation coverage confirming the date, the Mach 1.1 top speed and the 43,400 ft altitude.[1]
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