> Supercruise is sustained supersonic flight of a supersonic aircraft without using afterburner.
> Concorde routinely supercruised most of the way over the Atlantic
Real question: How many in-production/operation engines in world can fly supersonic without afterburners? I think it is only a handful, all insanely expensive and backed with squillions of dollars of gov't/military money. And, the maintenance cycle must be out of this world expensive.
