The TQ-11 (Chinese: 天鹊-11; pinyin: Tiānquè-11, lit. Sky Lark 11) is a gas-generator cycle rocket engine burning liquid methane and liquid oxygen under development by LandSpace. It will be used as the second stage vernier engine for LandSpace's ZQ-2 rocket.[2][3][4] The engine has been designed to produce 80 kilonewtons (18,000 lbf) of thrust in the vacuum.[1]
| Country of origin | China |
|---|---|
| Manufacturer | LandSpace |
| Status | Active |
| Liquid-fuel engine | |
| Propellant | LOX / CH4 |
| Configuration | |
| Nozzle ratio | 25.5 |
| Performance | |
| Thrust, vacuum | 80 kilonewtons (18,000 lbf) |
| Chamber pressure | 10.1 MPa (1,460 psi) |
| Specific impulse, vacuum | 337s |
| Dimensions | |
| Measurement | 1.1m |
| Diameter | 0.28m |
| Used in | |
| ZQ-2 | |
| References | |
| Notes | [1] |
History
LandSpace completed the first engine hot firing test for TQ-11 on November 3, 2019, and the engine passed a 1500 second test in 2020.[2][4] On December 14, 2022, Zhuque-2 completed its maiden flight. The TQ-11 engines used in the rocket's second stage failed, resulting in mission failure. LandSpace planned to upgrade the second stage with one TQ-15A engine, eliminating the need for a vernier engine. The failure of TQ-11 could force LandSpace to update the second stage quicker than anticipated.[5] In July 2023, LandSpace successfully launched its second ZQ-2 rocket, continuing to utilize TQ-11 engines for the second stage. Future flights are planned to employ the TQ-15A engines.[6]