Encyclopedia Astronautica
YF-20A



chinroc0.jpg
Chinese Engine
Credit: Sven Grahn
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Chinese Engine
Credit: Sven Grahn
chinroc2.jpg
Chinese Engine
Credit: Sven Grahn
chinroc3.jpg
Chinese Engine
Credit: Sven Grahn
chinroc4.jpg
Chinese Engine
Credit: Sven Grahn
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FB-1 Engine
Beijing Wan Yuan N2O4/UDMH rocket engine. 750.2 kN. Out of production. Isp=289s. Boosted CZ-2A, CZ-2C, CZ-2E(A), CZ-3, FB-1. First flight 1972.

Thrust (sl): 672.300 kN (151,139 lbf). Thrust (sl): 68,559 kgf. Chamber Pressure: 71.00 bar. Area Ratio: 10. Thrust to Weight Ratio: 0.

Status: Out of production.
Diameter: 0.84 m (2.75 ft).
Thrust: 750.20 kN (168,652 lbf).
Specific impulse: 289 s.
Specific impulse sea level: 259 s.
Burn time: 132 s.
Number: 212 .

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Associated Countries
See also
Associated Launch Vehicles
  • FB-1 Chinese orbital launch vehicle. The FB-1, like the CZ-2 launch vehicle begun the following year, was a two-stage booster developed from the DF-5 intercontinental ballistic missile. Payload for the booster was the JSSW, believed to have been a television-transmission military reconnaissance satellite. The incredible decision to develop two nearly identical rockets concurrently can be blamed on the turbulent factional politics after the Cultural Revolution. More...
  • CZ-2A Chinese orbital launch vehicle. The CZ-2 was originally designed for launch of the FSW-1 recoverable military reconnaissance satellite. More...
  • CZ-2C Chinese orbital launch vehicle. The CZ-2C was the definitive low earth orbit launch vehicle derived from DF-5 ICBM. It became the basis for an entire family of subsequent Long March vehicles. Many adaptive modifications were made to the configuration of the CZ-2A to handle a variety of new satellites and upper stages. The CZ-2C had improved technical performance and payload capacity compared to the CZ-2A, with later versions having a payload capability of 2,800 kg into a 200 km circular orbit. More...
  • CZ-3 Chinese orbital launch vehicle. The Long March 3 was a three-stage launch vehicle designed for delivery of satellites of 1,500 kg mass into geosynchronous transfer orbit. The first and second stages were based on the CZ-2C, and designed and manufactured by the Shanghai Academy of Spaceflight Technology. The majority of the technology and flight hardware used in the CZ-3 had been qualified and proven on the CZ-2C. The third stage, manufactured by CALT, was equipped with an LOX/LH2 cryogenic engine. Long March 3 was also capable of placing spacecraft into an elliptical or circular low earth orbit and sun synchronous orbit. More...
  • CZ-2E(A) Planned upgrade of CZ-2E with enlarged liquid boosters. Probably intended for launch of Chinese space station modules in the 21st century. Fairing was 5.20 m in diameter and 12.39 m long. More...

Associated Manufacturers and Agencies
Associated Propellants
  • N2O4/UDMH Nitrogen tetroxide became the storable liquid propellant of choice from the late 1950's. Unsymmetrical Dimethylhydrazine ((CH3)2NNH2) became the storable liquid fuel of choice by the mid-1950's. Development of UDMH in the Soviet Union began in 1949. It is used in virtually all storable liquid rocket engines except for some orbital manoeuvring engines in the United States, where MMH has been preferred due to a slightly higher density and performance. More...

Associated Stages
  • CZ-2C-1 N2O4/UDMH propellant rocket stage. Loaded/empty mass 153,000/10,000 kg. Thrust 3,295.00 kN. Vacuum specific impulse 291 seconds. More...
  • CZ-3-1 N2O4/UDMH propellant rocket stage. Loaded/empty mass 151,000/9,000 kg. Thrust 3,000.00 kN. Vacuum specific impulse 289 seconds. More...
  • FB-1-1 N2O4/UDMH propellant rocket stage. Loaded/empty mass 150,400/10,000 kg. Thrust 3,000.00 kN. Vacuum specific impulse 289 seconds. More...

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