My only experience of the tristar is flying those dreaded charter flights from the uk to canada on Air Transat, actauly they`re a great airline with really good service, just no leg room!
specificaly several trips from Belfast to Toronto, much as I love the tristar it seems that when stuffed with 360 pax and loads of baggage they really strugle to get off the ground, I remember the aircraft on all flights seemingly unsing all of the available runway then finaly begining to climb, however the climb rate seemed incredibly slow, the nose was pitched up but the aircraft appeared to be hardly climbing at all. I remember seeing an ATA tristar at gatwick, it used all the runway climbed away pitched up but not climbing that fast compared to other aircraft. I hve flown on Air Transats tristar 500`s and they understandably have much better take off performance.
Is this just my imagination, or does the tristar in charter config have poor take off performance???????