来自MSN2 个月
XB-70 Valkyrie: The Air Force Built a Mach 3 Bomber That Was Obsolete
Featuring six General Electric engines and an advanced delta-wing design, the XB-70 was an engineering marvel. However, the advent of surface-to-air missiles and intercontinental ballistic ...
Business Insider India6 年
Jump inside the XB-70 Valkyrie, the largest and fastest bomber that the US ever built
The XB-70 Valkyrie could cruise at Mach 3, riding its own shock wave to do so, and could hit altitudes of 70,000 feet. But the XB-70 Valkyrie never went into full-scale production ...