Hi,
I have somewhat recently begun using KSP with Real Solar System, Realism Overhaul, and Realistic Progression 1(As well as a the dependencies). It has been going well, and I am at the point that orbital launches are routine and reliable. But, then all my upper stages stopped working. I separate from the booster, and it can go one of 2 ways: 1. the decoupler goes off, but the second stage does not move. RCS engines make plumes but do not make any thrust. I try to ignite the Second stage engine, and the plume starts up, but it does not make any thrust. The other thing that sometimes happens, is that the decoupler separates, and the RCS thrusters work and ullage the rocket, but when I ignite the engine, the same thing happens with a plume but no thrust. I have tried this on 2 different second stages, different engines, different boosters, and I have reinstalled RO engines, but the same thing happens. Can anyone help with this? Am I not Ullageing enough? Is one of the mods not working?
