RS-68 (Boeing Rocketdyne)
The RS-68 is a new concept in rocket engines. Rather than focus on maximum performance in the design, Rocketdyne concentrated on cost-effectiveness. Simplified design lowers parts count considerably.
| Specifications | |
|---|---|
| Applications | Delta IV EELV |
| Propellants | LOX/LH2 |
| Thrust in Vaccum | 745,000lb |
| Thrust at Sea Level | 650,000 lb |
| Isp in vaccum (s) | 410 |
| Isp at sea level | 365 |
| Mixture Ratio | 6:1 |
| Weight | 14,560 lb |
| Chamber Pressure | 1410 psia |
| Expansion Ratio | 21.5:1 |
| Engine Cycle | ???? |
| Pump Design Pressures | ???? |
RS-27A : SSME 