After spending an entire week trying to construct a space plane that can achieve orbit and stay there I kept telling myself it was impossible with stock parts. Well, it isn\'t, and I did it. I spent a lot of time trying to construct one with the SundayPunch parts pack and kept making the mistake of trying to place rocket engines on top and below the fuselage instead of straight out the back. After many hours of dead kerbals and nosedives into the runway I finally built something that could achieve orbit. Once I realized that most of the mod parts I had added were mostly cosmetic, I retuned the ship to run completely on stock parts. Here\'s a youtube video showing my 4th or 5th successful flight.