Country of originChina
StatusUnder development
Liquid-fuel engine
PropellantLOX / CH4
Nozzle ratio45
Thrust, vacuum836 kilonewtons (188,000 lbf)
Throttle range55%~110%
Chamber pressure10.1 MPa (1,460 psi)
Used in
ZQ-2 Block 2

The TQ-15 (Chinese: 天鹊-15; pinyin: Tiānquè-15, lit. Sky Lark 15) is a gas-generator cycle rocket engine burning liquid methane and liquid oxygen under development by Landspace. The most recent version of the TQ engine family, the TQ-15A, is intended to power the second stage of LandSpace's upgraded Zhuque-2 rocket.[1]


In October 2022, the construction of a fresh batch of ZQ-2 rockets was announced by LandSpace. A new variant of the TQ family of engines, designated as TQ-15A, was used in the second stage. The weight of the engine was reduced by 400 kg as a result of the elimination of the TQ-11 vernier thrusters, and vectoring is now done with a thrust vector control system that can angle up to four degrees. Additionally, the thrust will be enhanced and equipped with restart capabilities for greater mission profile flexibility.[2]

In March 2024, the first flight-ready TQ-15A was delivered for the assembly of Zhuque-2 Block 2.[3]


  1. ^ Beil, Adrian (9 October 2022). "China launches Advanced Space-borne Solar Observatory". NASASpaceFlight.com. Retrieved 23 November 2022.
  2. ^ Zafar, Ramish (20 October 2022). "China's Largest Private Rocket Engine Breathes Fire In First Successful Test". Wccftech. Retrieved 23 November 2022.
  3. ^ "蓝箭航天首台天鹊A发动机成功交付". Weixin Official Accounts Platform (in Chinese (China)). Retrieved 15 March 2024.