This thread quickly descended into the usual Steam Vent mess… So, I hesitate to step into it. As a kid in the 1950s, I was an aviation and airplane junkie. So I can't keep quiet when I see something this wrong.
Chuck Yeager never flew, or rode, into space. He did fly the
Bell X-1 rocket-powered airplane faster than sound in Oct 1947, going about 700 mph (Mach 1.06). Later, Dec 1953, in a different airplane, the Bell X-1A, Yeager flew to an altitude of 74,700 feet (14.1 miles) and a new airspeed record of Mach 2.44 (1,620 mph, at that altitude).
The US Air Force awarded astronaut wings to anyone achieving an altitude of 50 miles (264,000 feet, or 80 km), while the governing body of air sports, the Fédération Aéronautique Internationale (FAI), sets the altitude of space as at least 100 kilometers (62.1 mi or 328,000 feet).
From 1959-68 the three
North American X-15 rocket planes flew a series of flights to the edge of space, about 50 miles or higher altitude. It was considered an operating space plane, as opposed to the space capsules that Russians and Americans rode into space in the earlier 60s.
In Aug 1963, Joseph Walker flew an X-15 to an altitude of 67 miles (107.8 km). A month earlier, he had flown nearly as high, to an altitude of 65.8 miles (105.9 km). A few years earlier, Russian cosmonauts and US astronauts rode as payloads in capsules as high or higher. But they were passengers, 'spam in a can', as opposed to pilots of an airplane.
The X-15's highest speed, 4,520 miles per hour (7,274 km/h), was achieved in Oct 1967, when William Knight flew at Mach 6.70 at 102,100 feet (31 km, 19.3 miles). This set the official world record for the highest speed ever recorded by a manned, powered aircraft, which remains unbroken.
In 13 of the 199 total X-15 flights, eight pilots (five Air Force and three NASA civilians) flew above 264,000 feet or 50 miles, thereby qualifying as astronauts according to the US definition of the space border.
To put the billionaire space boyz into context, Richard Branson with his crew & passengers rode to about 53.4 miles (282,000 feet or 86 km). And today, Jeff Bezos and his party rode higher, to about 62 miles or 100 km. It took a little under 60 years to equal what was done by US astronauts and Russian cosmonauts in their space capsules or the flyable space plane, NASA's X-15.