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Questions tagged [xb-70-valkyrie]

An extremely-high-speed-and-altitude airplane from North American Aviation, capable of flight at over mach 3. It was originally designed in the 1950s to deliver nuclear weapons, but the surface-to-air missile made it obsolete in this role; only 3 were ever built, and only as high-speed research aircraft.

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What is the purpose of the extra wheel on the XB-70 main gear?

This photo of the XB-70 Valkyrie's main gear shows a small wheel between the two main wheels: Courtsey of AirPigz.com This smaller wheel doesn't touch the ground, though I can see where it might as ...
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Why is the XB-70's Top speed only about 60mph higher than its cruise speed?

The maximum and cruise speeds listed for North American XB-70 Valkyrie are: Maximum speed: Mach 3.1 (2,056 mph, 3,309 km/h) Cruise speed: Mach 3.0 (2,000 mph, 3,200 km/h) Why is there such ...