XRS-2200 Linear Aerospike Engine
(Boeing Rocketdyne)
Developed for the Lockheed Martin X-33, the XRS-2200 uses a linear aerospike arrangement instead of the classic bell nozzle.

| Specification | |
|---|---|
| Applications | X-33, and future developments |
| Propellants | LOX/LH2 |
| Thrust in Vacuum | 261,200 lb |
| Thrust at Sea Level | 206,200 lb |
| Isp in vacuum (s) | 428.2 |
| Isp at sea level | 338.3 |
| Mixture Ratio | 5.5:1 |
| Weight | ???? (Integrated with vehicle) |
| Chamber Pressure | 854 psia |
| Area Ratio | 58 |
| Engine Cycle | ???? |
| Pump Design Pressures | ???? |

