Chuck Yeager had to guess the speed he reached in the first level supersonic flight, because the scale on the airspeed indicator didn't go high enough. (Image via @HumanoidHistory.) pic.twitter.com/R6TSZfocqs— Paul Graham (@paulg) October 14, 2020
Chuck Yeager had to guess the speed he reached in the first level supersonic flight, because the scale on the airspeed indicator didn't go high enough. (Image via @HumanoidHistory.) pic.twitter.com/R6TSZfocqs
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