I\'ve been attempting to make a space shuttle similar to the real life version in KSP. I have spent over five hours working on the thing, and I still can\'t get it into orbit. Frankly, it\'s starting to kill my interest in the game, and I don\'t want that to happen, so I decided to bring it to the experts here on the forums. I\'m using both NovaPunch and MechJeb for the shuttle, as it looks rather silly for the shuttle to bolted to the minuscule stock fuel tanks. I\'ve made a slight alteration to the config files that anyone who downloads the craft files needs to take note of. Specifically, I\'ve made two parts (NP_3m Decoupler and NP_miniDecoupler) to have fuelCrossFeed = True. The main problem is stability. Up until about 30-50 km into the ascent, everything is kosher; it\'s wobbly, it deviates from vertical no matter how hard you push it to stay vertical, and it takes on inclination like nobody\'s business, but it gets there nonetheless. Then it starts to tip. It does this because of the decreasing mass of the main fuel tank due to the fuel being exhausted. I suppose I should go into a little history of the development of the shuttle. This might be a little long, and I apologize, but I think it\'s a bit important. The first design flipped on its side as soon as it took off, nose-diving into the ground after about 20 seconds; the shuttle was way too heavy. So I added a counterbalance to the other side in the form of a modified AR202 MechJeb with a mass of 50. That worked... for a while. I eventually became frustrated enough that I removed the counterweight and added liquid engines to the orbiter to counter its weight, which is how the current design is. It was still tipping, however, so I added a decoupler to the large engine attached to the fuel tank, and it started tipping the other way, so I added liquid radial boosters to try and counterbalance. The radial boosters either didn\'t do enough or did too much, so I decided to ditch the main fuel tank when it started tipping and just use the orbiter engines to get to orbit. Everything up until now is my Shuttle 2.craft. So I added two fuel tanks in place of some engines that I originally meant to deorbit the shuttle, along with fuel lines to pipe the fuel to the orbiter\'s engines. However, the fuel logic decided that the orbiter\'s engines would draw from these fuel tanks before the main one at the beginning of the mission, leaving me with no fuel once I separated the main tank. So I disabled them at the beginning of the mission... which permanently disabled the fuel lines > Frustrated to no end, I closed KSP and came here to ask for help. I\'ve attached a few screenshots and the Shuttle 1.craft (which is my latest work on the thing) and the earlier Shuttle 2.craft. I\'m pulling out my hair at this point, and any help would be appreciated. By the by, I also noticed something while testing: while the orbiter would go off course upon launch, if I ended the flight and clicked restart launch, it would stay perfectly vertical.
