re: Ares 4
The Ares IV uses a five-segment booster. The Ares IV uses a four segment booster same as the STS. Also the upper stage uses two J-2X engines, not one.
Space/Science » in reply to re: Ares 4
The Ares IV uses a five-segment booster. The Ares IV uses a four segment booster same as the STS. Also the upper stage uses two J-2X engines, not one.