Mach 3.08 At 74,000 Feet: The XB-70’s Peak Moment Summary and Key Points: The lone surviving XB-70 Valkyrie—North American’s Mach 3 strategic bomber prototype—sits at the National Museum of the Air ...

Key Points and Summary on the XB-70 - The North American XB-70 Valkyrie was a magnificent but doomed attempt to create a Mach 3 strategic bomber to replace the B-52. -This revolutionary aircraft, with ...