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YF-100

Not to be confused with YF-100, the prototype number for the North American F-100 Super Sabre.
YF-100
YF-100 rocket engine
Country of originChina
First flightLong March 6 inaugural flight (2015-09-20)
DesignerAcademy of Aerospace Liquid Propulsion Technology
Associated LVLong March 5, Long March 6 and Long March 7
PredecessorRD-120
StatusIn service
Liquid-fuel engine
PropellantLOX / RP-1
Mixture ratio2.6 (±10%) (adjustable)
CycleOxidizer-rich staged combustion cycle
Configuration
Chamber1
Nozzle ratio35
Performance
Thrust, vacuum1,340 kN (300,000 lbf)
Thrust, sea-level1,200 kN (270,000 lbf)
Throttle range65%~105%[1]
Chamber pressure18 MPa (2,600 psi)
Specific impulse, vacuum335 seconds (3.29 km/s)
Specific impulse, sea-level300 seconds (2.9 km/s)
Burn time155 s (estimated)
Dimensions
Diameter1.338 metres (52.7 in)
Used in
Long March 5 K-3-1 and K-2-1 boosters, Long March 6, Long March 6A and Long March 6Cfirst stage and Long March 7, Long March 7A, Long March 8 and Long March 8A first stage and boosters.
References
References[2][3][4][5][6]

The YF-100 is a Chinese liquid rocket engine burning LOX and kerosene in an oxidizer-rich staged combustion cycle.[2]

Development of the engine began in the 2000s, along with its sibling, the smaller YF-115, which would power the upper stages of the Long March 6 and Long March 7 rockets.[7][8][9] Testing was directed by the China National Space Administration (CNSA) commencing in 2005. Development works are mainly carried out by the Xi'an Aerospace Propulsion Institute. The engine had its first 300 seconds test fire in November 2007.[10]

A high efficiency/high thrust environmentally-friendly rocket engine was always an objective within Programme 863 in the 1980s; however, Chinese industry was not mature enough at that time to produce such a rocket until they obtained RD-120s in early 1990 from Russia following the collapse of the USSR.[7] It is the first Chinese rocket engine to adopt the staged-combustion cycle and the most powerful to date. During July 2012 the engine fired for 200 seconds generating 120 t (260,000 lb) of thrust.[11] On May 28, 2012, the National Defense Science and Industry Bureau certified the engine.[12]

The engine is designed for use on the first stage of the Chinese government's new generation of launch vehicles, the Long March 5, the Long March 6 and the Long March 7.[7][8][9] The engine's maiden flight, on the Long March 6, took place on September 20, 2015.

  1. ^ Tan, Yonghua; Du, Feiping; Chen, Jianhua; Zhang, Miao (2018). "液氧煤油高压补燃循环发动机深度变推力系统方案研究 - 中国知网". Journal of Propulsion Technology (推进技术) (39). doi:10.13675/j.cnki.tjjs.2018.06.001. Retrieved 23 February 2021.
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  7. ^ a b c Cite error: The named reference sd-lm5 was invoked but never defined (see the help page).
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  12. ^ Cite error: The named reference sc-acceptance was invoked but never defined (see the help page).

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