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| Specification | Booster | Sustainer |
|---|---|---|
| Applications | Atlas II family (II, IIA, IIAS) | |
| Propellants | LOX / RP-1 | LOX / RP-1 |
| Thrust in Vaccum | 429500 lb | 60500 lb |
| Thrust at Sea Level | ||
| Isp (s) | 265 | 220 |
| Mixture Ratio | 2.25:1 | 2.27:1 |
| Weight | 3336 lb | 1035 lb |
| Chamber Pressure | 719 psia | 736 psia |
| Area Ratio | 8:1 | 25:1 |
| Engine Cycle | ??? | ??? |
| Pump Design Pressures | ??? | ??? |