He’s on Facebook, you can send him a message. He may or may not reply. But remember he only reached around Mach 1, ram rise isn’t that much. At 40,000 feet and Mach 0.85 the skin temperature (TAT) is around – 10°C, the actual temperature (SAT) is about – 50°C

I read he reached mach 1.24.

I did ask him…thanks.