Tristar 500
The trouble with the Tristar in BA was that with a large 747 Fleet the 500 only got the routes that for some reason the 747 did .not want
When Royal Jordanian bought the 5 white-tails at Palmdale they used them on Long-haul routes to good effect.JFK- Amman with a full load and Vienna-Miami which I admit could be a bit of a struggle.
I speak as an interested party having flown for BA Saudi RJ Air Lanka and in a small way helped to form 216 squadron RAF