Trent 600 MD11-s
They never existed. Out of the two airlines which ordered them, one went bankrupt and cancelled, and the other merged with BA and also cancelled.
What was Trent 600 supposed to like? The fan size was the same as that of Trent 700, and only slightly bigger than the other MD11 engines. But the thrust, at 65 000 pounds, would be bigger than the other MD11-s had (62 000 pounds or less).
How was Trent 600 supposed to compare to other MD11 engines in engine weight, takeoff distance, engine out handling, fuel burn and MTOW?