|Country of origin||China|
|Designer||Academy of Aerospace Liquid Propulsion Technology|
|Associated LV||Feng Bao 1, Long March 2, Long March 3 and Long March 4|
|Propellant||N2O4 / UDMH|
|Thrust, vacuum||47.1 kN (10,600 lbf)|
|Specific impulse, vacuum||297 seconds (2.91 km/s)|
|Long March 2F, Long March 3A, Long March 3B, Long March 3C, Long March 4B and Long March 4C second stage.|
The YF-23 is a liquid rocket vernier engine, burning N2O4 and UDMH. It is used in along the YF-22 to form the YF-24 and YF-25 propulsion modules.
The basic engine has been used since the Feng Bao 1 rocket and has been the vernier propulsion of the Long March 2, Long March 3 and Long March 4 families second stage.
This engine is bundled into modules along the YF-22 upper stage engine.
The relevant modules for second stage application are: