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OnePatheticClown · 51-55, M
Modified Mig-25...or the X-15
spjennifer · 61-69, T
@OnePatheticClown The X15 and it's predecessors were more rockets than planes and their range was very short, plus they couldn't take off on their own. The Mig 25 was never proven to beat the SR-71 though the Russians boasted it could but it had very limited range at speeds exceeding 2.5 Mach. The SR-71's top speed is still classified though it was know to exceed Mach 3 and had a range exceeding 5,000 Km's. The A-12 is probably the only limited productions plane that could exceed the speed of the SR-71