[ellisd]

The ejection capsule design for the XB-70 is some next level engineering. Your seat would move backward into a capsule before ejection to survive the cruising altitudes of 70k feet / Mach 3.

https://www.generalstaff.org/CDA/Air/B-70/XB-70_Escape_Syste...

[BonoboIO]

That is a really good explanation and reference. I like those old documents.