Take Off Weight for a JFK-LHR usually about 300t. Max Landing Weight 285t (ish). A quick circuit and you are not going to be far off that figure. You may also feel that it is more important to land than hang around.
Unless they were tanking. You know the price of gas in the UK?
Despite the fuel depot explosion, JFK is not currently a BA tankering station for the 744.
The boys done good!
T'bug
