Recall in the early 1960's, BOAC started B707 ops from LAX
nonstop to LHR
At the time, this was the longest nonstop jet transport route, and the operation was very limiting. 25L/07R had to be the departure runway (longest runway at the time, 12,000 feet) and the departure was at 10pm to be sure the ambient temperature was low.
Several times the aircraft arrived at the runway, only to have to sit there for awhile, burning off excess taxi fuel.
Found out just why some years later when I was flying these same particular 707 (non-fan) models...very long takeoff runs were the norm, and initial climb rate especially low.
started nonstop ORY
service shortly thereafter, and would be 15+ miles west before reaching 2000msl.