Mikey wrote:Captain Seafort wrote:t's niche was that it was too high and too fast to be intercepted by aircraft or missile - it would have fulfilled that role excellently, given that the Russians were never able to kill a Blackbird, despite them being lower and slower than the Valkyrie.
I'm not so sure that it was ever faster than an SR-71 or had a higher ceiling.
I've read speculations of the B-70 having a 90,000ft ceiling. I don't think we will ever get the truth about maximum speed. I know this is a poor comparison but the B-70 had six 85kN engines and the SR-71 had two 150kn engines. They are probably comparable.
In fact, one of the reasons it was cancelled was the advent of SAM's that were capable of intercepting the B-70.
That was the contention of Robert Strange McNamara, then Secretary of Defense, when he cancelled the program. He liked ICBMs, SLBMs, and Mutually Assured Destruction too.