How ‘The Fastest Man on Earth’ tested supersonic ejection seats on himself

How ‘The Fastest Man on Earth’ tested supersonic ejection seats on himself

On Dec. 10, 1954, John Stapp, a U.S. Air Force flight surgeon and researcher, hopped into an experimental decelerator sled. It would be his last ride in the sled, testing the limits of gravitational forces on the human body as it accelerates and decelerates. He reached a speed of 632 miles per hour that day, experiencing 46.2 g. It was then the most ever experienced by a human and it made Col. John Stapp “The Fastest Man on Earth.”  Stapp, his A…