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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How were the fuel tanks sealed on the XB-70 Valkyrie?

The Valkyrie flew at Mach 3.1, close to the SR-71's operating speed in cruise. For the SR-71: Fuselage panels were manufactured to fit only loosely with the aircraft on the ground. Proper alignment ...
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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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3answers
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Why weren't the XB-70's wingtips fixed in the down position?

The XB-70's wing tips folded down in flight to: improve directional stability at supersonic speeds reduce shifting of aerodynamic center at supersonic speeds reduce drag at high supersonic speeds ...
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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 ...