Thanks for taking a look at aerodynamics! We tuned that aircraft model so it is easy to fly at lower speeds, like below about 400 km/h. You can try altering the center of mass and position of the elevators to improve responsiveness, but the aircraft will become less stable the more responsive you make it.
Having said that, I think what you are seeing in the video is related to the high speed the aircraft is at (~1400 km/h, above Mach 1). It looks like you increased the max thrust? Our aerodynamic model is a compromise between real-time performance, robustness (i.e. doesn’t crash), and believable behavior. What your example shows is some behavior that can occur when the forces are so large they may cause the underlying numerical method to be unstable. For flight vehicles it really works best at lower Mach numbers. However, thanks for this feedback! We can use your example to find ways to expand flight regimes the model reliably, and in real time, works with.
