I am trying to understand how high an aircraft can get to at its maximum takeoff weight (minus whatever fuel is consumed in getting to that altitude). Can it make it all the way to its service ceiling? Or is there a payload/altitude tradeoff beyond a certain level? If there is such a trade-off, at what altitude does it start to occur? Meaning what is the highest a plane can go at its maximum takeoff weight? Is it the cruising altitude? If not, what is it called and where would one find it for specific planes (thinking of KC-135R, A330 MRTT and Pegasus KC-46).
Apologies for throwing so many questions at once.