Concorde's afterburners
Can anyone tell me if it was normal for concorde to use less than all 4 afterburners in the early stages after take off.
I ask because a member of another (non aviation) website I use commented that he knew when concorde was late taking off because all four A/B's were lit. Now that sounds like cobblers to me, I always assumed they were all on OR all off. Cannot see what difference it's departure time would make in a decision to rocket skywards???
Cliff