
The launch vehicle combines two of the world's most reliable propulsion systems. ATK is the prime, providing the human-rated five-segment solid rocket motor as the first stage, and Astrium (an EADS Company), is providing the core stage from the Ariane 5 rocket, including the Vulcain 2 engine as Liberty's upper stage. Liberty has the capability to lift 44,000 pounds to low-Earth-orbit, the highest pounds to orbit of any other vehicle currently working under commercial agreements.


