ctstech25

It seems it's the AI traffic. I still need to make a true long flight, but I turned off AI traffic and a quick prelim flight into JFK was very responsive and promising. Thank you for taking the time to answer my question. Norman

Mr. Dowson, I have read through many of your threads and consider you to be the absolute with regards to MSFS (all versions.) I realize that you probably get about a thousand inquiries a day, so this would be inquiry 1001. I just purchased FSUIPC and am only getting started with the manual (will take awhile to get through it). I just thought you might weigh in on this phenom I'm experiencing. I am noticing a degradation of performance as I go on longer flights. I have tuned my system IAW different forum suggestions. Currently running Win 7 64 bit, 4 gb ram on a dual core Intel processor. Very pleased with the results. I can get both add on planes PIC 737 and PMDG 747 to give me 30+ fps in complicated airports... LAX,JFK,BOS etc. with most sliders set to slightly over half. OK here is the weird part. A flight from KSFO to KLAX PIC 737 starts out at 30 - 40 fps taxi, take off and fps goes up to 40 - 50 and sometimes higher. However, as I approach KLAX about 100 miles out fps comes down to 20 fps and by the time I land is at 12 to 14 fps. If I stop the sim, shut down FSX and restart, put the plane back where I left it, not changing anything else, I am back to 30 - 40 fps. On longer flights, like 3 hours or so, the fps is down to 7 or 8 on landing. Reload FSX and I'm back to 30 - 40 fps. This is true for the PMDG 747 as well. It seems that either the add on planes or FSX is stacking resources and causing the degradation of performance as time goes by in the sim. It feels like either FSX or the addons are taking resources and not releasing them when no longer needed. Is this even possible? I have tried changing sliders down as I approach destinations, but this seems to have no affect. I'm just wondering if anyone else has experienced this phenomenon? I have seen some threads that seem to be similar, but nothing specific. I am running FSX with PMDG 747 and PIC 737 add ons, fs2crew (have experienced this phenomenon even without fs2crew), fsuipc4 (have experienced this same phenomenon without fsuipc), so I'm wondering if this is an FSX phenom. Norman