The folks who collaborated on this virtual aircraft usually do great work, so despite cmr1990's comment and warning posted above, I thought I'd give it a try. It works great for me. No hint of the problem mentioned above. I have no idea why the engines quit for cmr1990. We all have different combinations of hardware, and run different add-ons, and have made different under the hood adjustments to config files, so I can't guess what might be causing that issue. All I know is, on my system, this virtual aircraft is a real pleasure. My thanks to the folks who created it.