As I understand it, turbojet thrust decreases both with altitude due to rarefied air reducing massflow, and airspeed due to a smaller speed increase between intake and exhaust relative to the airframe. However aircraft designed for sustained supercruise such as Concorde or Blackbird had intakes that used various amounts of ram-effect pressure recovery, so I was wondering how much that would offset the effects of being fast and high i.e. what was Concorde's mach 2 max thrust compared compared to sea level dry thrust, and/or the Blackbird's mach 3.2 turboramjet thrust compared to take-off wet thrust?
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$\begingroup$ Related: In what way are the Concorde's engines considered efficient? $\endgroup$ – mins Jan 14 '17 at 12:42
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$\begingroup$ Thanks for the link that's a pretty interesting read, but I was asking about thrust not efficiency. $\endgroup$ – Talisker Jan 17 '17 at 21:34
