ABOUT SERVICE MODULE PROPULSION (ORION ESM)
The Orion European Service Module provides primary propulsion for NASA Orion deep-space missions using a single AJ10-190 orbital maneuvering engine derived from the Space Shuttle OMS. Built by Airbus Defence and Space, the ESM also provides power, thermal control, and consumable storage. It is expended before crew module reentry.
SPECIFICATIONS
| Category | Propulsion |
| Subcategory | Service Module Main Engine |
| Manufacturer | Airbus Defence and Space / Aerojet Rocketdyne |
| Mass | 4,000 kg |
| Power | 11,200 W |
| Dimensions | 5.2 m diameter x 4.0 m height |
| Redundancy | 1 main engine + 8 auxiliary + 24 RCS |
| Standard | Human-rated deep space |
| Status | Active |
| First Use | November 16, 2022 |
OPERATING PRINCIPLE
AJ10-190 pressure-fed hypergolic engine (NTO/MMH) provides 26.7 kN; 8 auxiliary thrusters for backup; 24 RCS for attitude
KEY SPECIFICATIONS
| main_thrust_kn | 26.7 |
| propellant_kg | 8600 |
| delta_v_ms | 1340 |
| solar_panels | 4 wings |
MASS CONVERSIONS
| Kilograms | 4,000.0 kg |
| Pounds | 8,818.5 lbs |
VEHICLES USING SERVICE MODULE PROPULSION (ORION ESM) (2)