*** Posted by run ***
[F16 can land with 2 air to air missiles
and full 1 300GAL fuel tank and 2 370GAL fuel tanks as well as full internal fuel?!
Some block numbers can do that. Others can't

Run

why only some block can do that and the others no?

regards SHONEY
]
Because some of the later block numbers have a lot of extra stuff built in which make them heavier. LANTIRN etc.

RUN