Well essentially records indicate a dry thrust of 73-74kn, primary wet thrust is 81-83kn and double wet ( giggity) is estimated in the 87-89 kn of thrust on a standard ground temp 15°C 29.92 QNH. As buzzles said it is not designed to provide an increase in performance above 5000m ASL. I can attest to the .6-.9M dash and especially Time to Climb. T/O to 7km at 1st stage AB takes about 4m30s. EmrgAB goes to that in about 2m30s. Payload configuration for this was ×800L centerline x2 r3r otb pylon x2 r60 inb pylon
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