BelArgUSA
You are of course right. I was referring to the 400's
BA's 100's were PW JT9D's as were most if not all 747 100's
The 200 was the first 747 that RR got onto in the mid to late 70's me thinks (brains getting older and more addled) as did GE with the CF6.
It was at the time in the Guinness (partly responsible for my brains condition
) Book of Records as the heaviest flying object of which BA was the first to fly.
RR with the 3 shaft design has captured nearly half of all large turbofan sales and almost seen of Pratt from this arena which has had to team up with once great rival GE to form GENx for the A380 and 787.
The RB211 nearly sank RR and almost certainly hindered the L1011's success in thde early 70's but has proven to be winner in the long run.