I recently got FSD's Piper Navajo and though I like the look of the plane a lot, the plane shakes when I am flying it. I have turned off Turbulence, weather, active camera and anything else I think might be making the plane shake without any change. I have a number of payware planes from Corenado and Dreamfleet that do not display this problem, so I am at loss to what is causing it. If anyone has some ideas and can offer some help I'd greatly appreciate it. I wrote to FSD and here's what they responded, but it wasn't a lot of help;[We have absolutely no idea. Sorry. This is perhaps a problem within FS, like a saved flight with weather or some weird AP function engaged. Of the thousands of users none have reported it because it is not possible to make any a/c behave like this in itself. Irrespective of the design, when the a/c is trimmed, all a/c only diverge due to either weather of some sort, or control inputs.]

FDE designers engineer the MOI of most aircraft so they being to shake when being flown at high airspeeds that exceed the envelope for the aircraft. Pitch, roll and yaw can all be tweaked separately so the aircraft may get the shakes in only one axis, or all three.You first have to make sure you aren't exceeding the airspeed for that aircraft. Many will see the published speed of the aircraft and try to fly that at altitude without taking into account the difference between indicated airspeed and true airspeed. Assuming you know what you are doing and you're flying the aircraft correctly, you can always try to add to the MOI values in the aircraft.cfg. Bumping them by ten to twenty percent usually does the trick. Just keep in mind this may sacrifice realism as the higher the MOI, the more "truck like" the aircraft will feel. -John

Thanks for the response. Just after posting this problem I pretty much solved it. I had planned to get online and edit or remove the post, but the forum was down and remained down for several days and by the time it was back up, the edit time had passed. Anyway, I wanted to apologize to any members of the FSD team that may have been reading this post. I wrote the above post in frustration and regretted doing so almost as soon as I wrote it. I would have changed it had I been able to. I hope the FSD will accept my humble apology.-Kevin

Kevin, Thanks for saying that, but it's not necessary. Please don't give it a second thought. For those technically curious, the one-off problem was identified by the user as being a spot view issue, specifically, a latency setting being set too high for this particular PC system in the Active Camera menu options. What was happening in this case was that the camera view was delivering jerky performance creating the illusion that the a/c moving around all axes without any control input or with any turbulence or weather being set. Knowing our work was OK, with no other user report history, that meant the problem was machine / FS related. It's always satisfying when a user is able to resolve a unique problem we have no experience with by the patient process of elimination. What is even more satisfying is when the user (as Kevin did) actually takes the trouble to contact us to let us know what they did to resolve it. We really value that sort of feedback, and as a result of it, Kevin's findings related to this unique and isolated problem were added to our support knowledgebase that we can refer to if such a report happens again. Best,.....http://www.fsd-international.com/team/Steve_signature.gif