ABOUT YF-100
The YF-100 is a LOX/kerosene staged combustion engine developed by the China Academy of Launch Vehicle Technology (CASC) for China’s Long March 5, 6, and 7 launch vehicles. It is China’s most powerful operational liquid-fuel engine, providing 1,200 kN of sea-level thrust. The YF-100 draws on design heritage from Russian oxygen-rich staged combustion technology.
Image: CASC
PERFORMANCE
| Thrust (Sea Level) | 1,200 kN (270,000 lbf) kN |
| Thrust (Vacuum) | 1,340 kN (301,000 lbf) kN |
| ISP (Sea Level) | 300 s s |
| ISP (Vacuum) | 335 s s |
| Chamber Pressure | 18 MPa (2,611 psi) bar |
| Mass | 1 kg |
| Thrust-to-Weight | 80 |
| Throttle Range | 65–100% |
| Restart Capable | No |
THRUST CONVERSIONS (VACUUM)
| Kilonewtons | 1.0 kN |
| Pounds-force | 225 lbf |
ENGINE CYCLE
Oxygen-Rich Staged Combustion
PROPULSION
| Propellant | RP-1 |
| Oxidizer | LOX |
| Engine Cycle | Oxygen-Rich Staged Combustion |
| Mixture Ratio | 2.6:1 |
| Flow Rate | ~400 kg/s kg/s |
PHYSICAL
| Dimensions | 1.65 m diameter × 2.88 m length |
| Combustion Chambers | 1 |
| Nozzle Expansion Ratio | 35:1:1 |
GENERAL
| Manufacturer | CASC (Academy of Aerospace Liquid Propulsion Technology) |
| Country | China |
| Status | Active |
| First Flight | April 16, 2026 |
VARIANTS (2)
- YF-100
- YF-100K
VEHICLES USING YF-100 (3)
ENGINE LINEAGE
YF-100→YF-100K (upgraded)
⚖ PROPELLANTS
