YF-1

YF-1B
Country of origin China
Date 1958-1969
Designer Academy of Aerospace Liquid Propulsion Technology, Ren Xinmin, Mo Tso-hsin, Zhang Guitian
Associated L/V DF-3A, DF-4 and Long March 1
Predecessor С2.1100
Successor YF-20
Status Retired
Liquid-fuel engine
Propellant N2O4 / UDMH
Cycle Gas Generator
Configuration
Chamber 1
Nozzle ratio 10
Performance
Thrust (vac.) 303.6 kN (68,300 lbf)
Thrust (SL) 275.3 kN (61,900 lbf)
Chamber pressure 7.1 MPa (1,030 psi)
Isp (vac.) 267.4 seconds (2.622 km/s)
Isp (SL) 242.5 seconds (2.378 km/s)
Burn time 140s
Dimensions
Diameter 56 centimetres (22 in)
Used in
DF-3A, DF-4 and Long March 1 first stage.
References
References

[1][2][3][4][5][6]

[7][8]

The YF-1 was a Chinese liquid rocket engine burning N2O4 and UDMH in an gas generator cycle. It is a basic engine which when mounted in a four engine module forms the YF-2. It was used as the basis for developing a high altitude version known as the YF-3.[2][9]

Some authors state that it was a direct copy of С.2.1100/С.2.1150 La-350 booster engine developed by Isayev OKB-2 (NII-88).[10] What is known is that the engine development had great trouble with combustion instabilities and it took a long time to have a reliable combustion.

Versions

The basic engine has been used since the DF-3 rocket and has been the main propulsion of the Long March 1 orbital launch vehicles.[2]

Modules

While the basic engine was used multiple times, it was only used as a single engine for booster application. It is usually bundled into modules of multiple engines.

The relevant modules for first stage application are:

See also

References

  1. Norbert Bgügge. "Asian space-rocket liquid-propellant engines". B14643.DE. Retrieved 2015-07-25.
  2. 1 2 3 4 5 6 7 8 9 Norbert Bgügge. "Propulsion CZ-1". B14643.DE. Retrieved 2015-07-25.
  3. 1 2 3 4 5 Norbert Bgügge. "The Chinese DF-3 missile". B14643.DE. Retrieved 2015-07-25.
  4. "Long March". Rocket and Space Technology. Retrieved 2015-07-25.
  5. "CZ-1". Encyclopedia Astronautica. Retrieved 2015-07-25.
  6. "YF-2A". Encyclopedia Astronautica. Retrieved 2015-07-25.
  7. "YF-3". Encyclopedia Astronautica. Retrieved 2015-07-25.
  8. Harvey, Brian (2004). "Launch Centers Rockets and Engines". China's Space Program From Conception to Manned Spaceflight. Springer Science & Business Media. p. 230. ISBN 978-1852335663. Retrieved 2015-07-15.
  9. Mowthorpe, Matthew (2004). "Chinas Military Space Program". The Militarization and Weaponization of Space. Lexington Books. p. 90. ISBN 978-0739107133. Retrieved 2015-07-15.
  10. 1 2 3 "Dong Feng-3 (CSS-2)". SinoDefence. Retrieved 2015-07-25.
  11. "Dong Feng-4 (CSS-3)". SinoDefence. Retrieved 2015-07-25.
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