I'm not sure of the weight of the -22B/earl 524's v the competition of the day
The -524B402 version on the -500 model TriStar, was about 1500 pounds heavier than its GE counterpart, on the DC10, if I recall correctly.
However...the Roller was considerably more fuel efficient (9%, actually) and....quieter.
Have to say, RollsRoyce....mightly fine engines.
