Don't need to accelerate!
You don't need to accelerate to "Mach 25+" to reach orbit. In fact, you don't need to accelerate at all. As long as your craft can get you off the ground and can maintain a steady push, you can reach orbit at any speed. The issue is what speed you attain when in orbit, to stop yourself from being pulled back down to earth and being reduced to a hot, steaming, metal lump.
Biting the hand that feeds IT
