I made the decision to purchase X-Plane 11. Stick with it and I'm sure you'll end up having a great deal of fun! Like most things with a learning curve however, a degree of patience is required. X-Plane is a serious sim, but a highly enjoyable one at that. Regarding compatibility.you're usually safe to go back one version (11 to 10, 10 to 9 etc), but don't expect 100% compatibility all of the time. Lockheed_l-1049g_super_constellation_xp1105.zip Here are a few examples to start with (search the file names in the file library): Many are also available with a virtual cockpit. There are some exceptional models available in the file library, with all incorporating a 2D panel (Alt - W). Purchasing it would be the solution but I am not ready to bite the bullet and buy X-Plane 11 at this time. X-Plane 11 is supposed to be a real serious flight sim in terms of quality graphics and flight characteristics but I can't get convinced using the demo. I still use MS Flight Sim X and I enjoy it even though it is a dated product. I have a lot to learn but using the demo is extremely frustrating since it stops functioning after several minutes so I can't get a good feel for the product. Some planes are labeled as XP8 or 9 or 10 but not sure if they will install correctly and run well on XP11. Some do not have 2D and 3D cockpits and that makes viewing real frustrating. I am still questioning what is available for free since I have been looking around on this forum for aircraft and what I have downloaded has been less than stellar as far as quality and details. How far back in versions can I import X-Plane files into the new version 11?

Download x plane 11 planes for free