Originally Posted by
PEOPLESX
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AFAIK the Concorde was able to fly supersonic with afterburners off, once reached supersonic speed.
More precisely, Concorde would use the afterburners for about 10 to 15 minutes to get over the "speed bump" (drag rise) at and above Mach 1.0, until about Mach 1.7 was reached. By then thrust/drag had increased enough that the afterburners could be cut, and the aircraft could accelerate and cruise at Mach 2.0 on "dry" thust alone.
CJ