I like heavy transports, want to simulate a real flight between Denver Intl. to Vandenberg AFB (CA) carrying Atlas rocket boosters, whith the Thoma's Ruth Antonov 124 freeware.
Load the plane with 75.000 kg + fuel, both below the max TO weigth.
You can imagine the problem: The airplane doesn't lift, she reach 175+ knots at runway's end and do not take off.
Trying too with flaps in poss. 1, 2, no flaps,...
I trying in Los Angeles Intnl. (thinking Denver is a little high) and the same results. Seems lack of power.
These are long (or normal) runways, no?
Some idea?
Thank for reading my confession.