Well I give up, I need some help getting my Imperial Class Star Destroyer into orbit. It's powered by 19 Rockomax "Mainsail" Liquid Engines. 12 of the engines are staged. The staged engines have two large fuel tanks each and the 7 main engines have 9 large fuel tanks. All of the fuel tanks are daisy chained together. There are about 50 RCS thrusters supported by 6 large RCS fuel tanks. In total there are 1200+ parts. I saw a similar ship posted, but it was photoshoped into orbit, powered by ion drives and looked a bit small... So i made mine three times bigger and i intend to get it up there under it's own power. I typically get her out to 100km where there in no atmosphere and start a turn for orbit; it's obviously a slow process. Any atmosphere and i lose control. Then I start my burn, but I can only push it to about 1/3 throttle, otherwise she spins out of control and the RCS ports cant keep up. The slow burn drains the rest of the fuel while I coast out to 300km and then gravity pulls me back down to re-entry. I'm trying not just "add more fuel" so if any one have any bright ideas on how to keep it afloat or have more questions, please share!