Neha Patil (Editor)

YF 23 (rocket engine)

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Country of origin
  
China

Application
  
Vernier engine

First flight
  
1974-11-05

Status
  
In Production

Designer
  
Academy of Aerospace Liquid Propulsion Technology

Associated L/V
  
Feng Bao 1, Long March 2, Long March 3 and Long March 4

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.

Contents

Versions

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.

  • YF-23: Original version.
  • YF-23B (AKA DaFY21-1): Improved version.
  • YF-23F: Improved version.

    • Modules

    This engine is bundled into modules along the YF-22 upper stage engine.

    The relevant modules for second stage application are:

  • YF-24: A module comprising an YF-22 and a single YF-23 verniers.
  • YF-24B: A module comprising an YF-22B and a single YF-23B verniers.
  • YF-24E: A module comprising an YF-22E and a single YF-23F verniers.

    • References

    YF-23 (rocket engine) Wikipedia
    (Text) CC BY-SA