Randomness00

I've been playing around, I think it might be thrust? I used less fuel in the fuel tank as the shuttle doesn't use it all to get into orbit anyway and it had the same issue. I was looking at thrust on the flight engineer. The SRB's go around 50km, once they go thrust goes from 14000 to 2500. This coincides with a falling apoapsis. I used the infinite fuel debug and kept the SRB's going and it reached orbit.

Sorry Double Post

Hi there. I've been enjoying this mod greatly, but I'm having a similar issue but with the STS. I have not changed it other than add in a small payload into the cargo bay. It launches brilliantly, but once the SRB's have gone, and I reach about 50km, the shuttle and fuel tank start to pitch up and down, getting more and more vigorous. I've tried it with mechjeb and manually (with and without sas), and I just cannot seem to overcome this problem! Any advice? I have tried using the same settings as above which seemed to improve mechjeb but still the same problem. Just wondering if anyone else is able to launch the STS and if so how! I don't have any aerodynamic mods. Thanks