Originally Posted by Les

...This is my first real attempt at a Rocksim design. It has been doing weird things. It always shows I have margin - sometimes even over-stable. But when I do the flight profile, sometimes it is stable and other times it is not (once I just exited without saving and re-started with no changes and got different results). When it has shown to be unstable for the flight sim, I've removed a part of the design. It then flies stable. I then add the original part back, and it is still stable. I've also noted that when I make a design change, the 2D view would not immediately update. If I switched to the 3D (or rear) and then back to 2D the view would then be updated. Could this be part of my stable/unstable issue...