I recently became interested in the Aero Commander aircraft after buying FCS Pole to Pole. I came across an unbelievable freeware package called the "Aero Commander series for FSX" by Milton Shupe at com-central.netIt was originally for FS2004 and the package was upgraded for FSX. However, I am experiencing some minor FPS issues and I was hoping someone could shed some light on this for me. First, a few basics: I run FSX with the frames locked at 30 (with the internal limiter). I fly mainly on ORBX sceneries. I recently tried this aircraft at CYYJ and my frames dropped to about 25. To set a benchmark, I loaded both the default King Air 350 and the Aerosoft Twin Otter and for both my Frames stay pegged at 30. Switch to the Aero Commander and it drops back to 25.Here is what I have done so far:Since the package was old (I have no idea if this helped or not) I converted all of the BMP textures to DDS.I regularly defrag, but just to check I used Ultimate Defrag (highly recommended by the way) and placed all of the files and folders on the outer edge of my 10000 rpm velocoraptor HD.There appears to be nothing extreme about the panel. It uses default gauges and is in fact rather plain and not very crisp.After all of this my frames improved but only to 28. I know it is only two frames but you know how us FSX freaks are about our FPS. :)Therefore, my question is this - Is it most likely something like too many polygons on the model (It is not a real intricate aircraft to begin with), or is it possible that AIR file specs or maybe even the aircraft cfg can be so detailed as to cause FPS loss?? Both seem unlikely to me on a freeware aircraft but I am far from an expert. Any ideas??Thanks in advanceMarc

Non-native aircraft imported into FSX (i.e. ones that were developed using the methods in the FS2004 SDK) will pretty much always run a little bit slower than ones that are native FSX models which used all the fancy things in the FSX SDK, if the drop is only two frames per second, then to be honest that's fairly inconsequential.Al