So it seems aerodynamics is a hell of a lot harder than rocketry. My efforts of building a space rocket mostly involve power-to-weight ratios and making sure I have enough fuel. But building a jet fighter is proving to be significantly tougher. I\'m currently on the Mk6 of my current run of space-planes and I barely managed to get the Mk5 off the ground. My troubles seem to stem from keeping the thing balanced. Mk1 through Mk4 had their engines at the back and so would spin violently end-over-end the moment the SAS was switched off. Mk5 had this problem also but I managed to alleviate it somewhat by altering the weighting and changing where the lift was concentrated. As of currently the Mk6 has the engines placed in the middle, this has stopped the problem of weight imbalance but now I can\'t get the thing off the runway, it gets to roughly 140m/s and then spins out. I honestly don\'t know what\'s causing it so I\'m coming here to get some profssional advice. If you want I can provide screenshots of my craft so you can get a better idea of what I\'m building