Short from Ravenstar - a stock aircraft. Added two nuclear engines, air brakes and a bit of fuel. Now it is capable of reaching the moon orbit and return back in one stage, without refueling. No oxidizer requered!
https://drive.google.com/file/d/0B3d7FuqEvqDQclRKY2RPRU9CTUk/view?usp=sharing
Hot keys:
1 - toggle atmospheric engines
2 - toggle Nerv engines