wondered if anyone else is losing avionics/autopilot functionality after 1 hour of flight? I also noticed that the updating of the simulation became cyclic as well, evidenced primarily by the taxi light cycling on/off once per second. I know the author is aware of some autopilot issues, but wondered if my problem is unique.

Not happened here yet and I've flown a couple of 2-hour+ flights. Just a thought, you are running with both AC and DC gens on aren't you?AndyEGTR

I think so--check a night flight from jax to mia

I think I may have had the old FSUIPC. With the newest version, it appears everything is stable