I was just going to take one of these puppies for a spin. I think I'll take it up to about 55000m, fly level with the scram jet on full throttle till the speed maxes out and then barrel up at a 45 to 50 degree ascent. At about 135000m I'll click on the rcs and level out with the horizon, then fire up the deurterium powered ion thrusters. Should accelerate pretty fast without any air in the way. Not sure where I'll go from there yet, maybe the ISS. Wish me luck.
eta: Hmm the air is too thin above 40,000m for the scram jet to function. That was trippy. There must be a glitch. I was just about to Mach 8, the nose was glowing a light orange, and then it's like the ship hit a lighting bolt or some sort of spacial anomaly. The next thing I know I'm spinning out of control, way out 3,000,000m above the Earth, clocking about 2,500km/s right into deep space. I can see the planet visibly shinking and drifting away from me. I think that's Earth? Yikes.. How do I get back home?