I built a basic propulsion module but I haven’t gotten around to really implementing it yet I just put in some code to add it into some of the modules but I have not tested it. I’ve mainly been focusing on debugging the dynamics modules as I ran some tests with verbose logging and it appears that there is either something wrong with the calculation of the aerodynamic coefficients or there is something fundamentally wrong with the equations of motion. Here is a screenshot of the erratic behavior (pitch oscillating wildly, roll switching oddly between 0 and 180 degrees, velocity oscillating, altitude behaving weirdly, and all manner of weird stuff.