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The 1960s airplanes sometimes seem anachronistic. Both the XB-70 and SR71 were mach 3+ airplanes that flew in 1964. That was five years before the 747.
by rayiner 2y ago
The 1960s airplanes sometimes seem anachronistic. Both the XB-70 and SR71 were mach 3+ airplanes that flew in 1964. That was five years before the 747.
- hollerith 2y agoWe no longer needed the XB-70 when ICBMs got good (basically when they changed from liquid fuel to solid fuel). We no longer needed the SR71 when reconnaissance satellites got good.