Captain Sim wrote on May 17^th, 2021 at 3:56pm:

bryer wrote on May 17th, 2021 at 3:11pm: the weights are all off for a 777 https://www.captainsim.org/forum/csf.pl?num=1621237231

You want me to submit a bug report for your product for the basics of it?

Google search 777-200ER and look at the weights, then compare it to your "747" weights in the aircraft_config file. No wonder it takes so long to get airbourne, 2 engines trying to shift 747 weight.