Uploaded October 2023 | Updated September 2026, 2 weeks ago
Of all the dozens of X-planes that have been built only one, the X-15, has achieved a similar, legendary status to the X-1 in which Chuck Yeager broke the sound barrier. The X-15 was also a rocket-plane but instead of maxing out at 2½ times the speed of sound, it eventually reached more than Mach 6 and flew so high that for minutes at a stretch, on some missions, it wasn’t an aircraft but a spacecraft plunging through the near-airless void 50 or 60 miles above the ground.
My other YouTube channels:
The Science Fiction Rock Experience (the music show I produce):
youtube.com/@ScienceFictionRockExperience
Discover Maths (with Juan Medina):
youtube.com/@discovermaths
Science World (with Emrah Polat):
youtube.com/@ScienceWorld1
My website:
daviddarling.info
Of all the dozens of X-planes that have been built only one, the X-15, has achieved a similar, legendary status to the X-1 in which Chuck Yeager broke the sound barrier. The X-15 was also a rocket-plane but instead of maxing out at 2½ times the speed of sound, it eventually reached more than Mach 6 and flew so high that for minutes at a stretch, on some missions, it wasn’t an aircraft but a spacecraft plunging through the near-airless void 50 or 60 miles above the ground.
My other YouTube channels:
The Science Fiction Rock Experience (the music show I produce):
youtube.com/@ScienceFictionRockExperience
Discover Maths (with Juan Medina):
youtube.com/@discovermaths
Science World (with Emrah Polat):
youtube.com/@ScienceWorld1
My website:
daviddarling.info
