National Security Journal on MSN
The XB-70 Valkyrie could reach Mach 3 at 70,000 feet with 6 engines — friction heated its skin to 600°F
The Air Force commissioned the XB-70 Valkyrie in the late 1950s to drop nuclear bombs from Mach 3 at 70,000 feet. North ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results