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RS-68
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.
Engine statistics
| 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 |
???? |