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YF-115

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YF-115
Country of originChina
First flightLong March 6 inaugural flight (2015-09-20)
DesignerAcademy of Aerospace Liquid Propulsion Technology[1]
Associated LVLong March 6, Long March 7 and Long March 12[2][3][4]
StatusIn service
Liquid-fuel engine
PropellantLOX[5] / RP-1[5]
Mixture ratio2.5[5]
CycleOxidizer-rich Staged combustion[5]
Configuration
Chamber1[5]
Performance
Thrust, vacuum176.5 kN (39,700 lbf)[citation needed]
Thrust, sea-level147.1 kN (33,100 lbf)[citation needed]
Chamber pressure12 MPa (1,700 psi)[5]
Specific impulse, vacuum341.5 seconds (3.349 km/s)[5]
Dimensions
Length2,325 millimetres (91.5 in)[5]
Diameter946 millimetres (37.2 in)[5]
Used in
second stages of Long March 6, Long March 7 and Long March 12[2][3][4]

The YF-115 is a Chinese liquid rocket engine burning LOX and kerosene in an oxidizer-rich staged combustion cycle.[5] A high efficiency/high thrust environmental-friendly rocket engine was always an objective within Programme 863. Development began in the 2000s, along with its sibling, the bigger YF-100, which would power the LM-5, LM-6 and LM-7 boosters and first stages.[6][7][8] 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. It is used as the upper stage engine for China's next generation of medium and light environmental-friendly launch vehicles, namely the Long March 6 and the Long March 7.[6][7][8] During early 2012, the engine system successfully passed vacuum testing.[9] It is China's first upper stage rocket engine to adopt the staged-combustion cycle.

In the LM-6 upper stage it will use a single YF-115 with gimbaled mount. While the LM-7 upper stage will use four such engines. But in this latter case, two engines will be fixed and two will be gimbaled.[citation needed]

The newest rocket in the Long March series, the Long March 12, uses two YF-115 engines in its second stage.

See also

[edit]
  • LM-6 – Rocket family that uses the YF-115.
  • LM-7 – Rocket family that uses the YF-115.
  • LM-12 – Rocket family that uses the YF-115.
  • YF-100 – First stage Chinese rocket engine which is the technological base of the YF-115.

References

[edit]
  1. ↑ "采į”Ļ乆äŧ€äđˆæ–°æŠ€æœŊ吗20éĒ—åūŪ小åŦ星送å…ĨéĒ„åŪšč―Ļ道_å‚č€ƒæķˆæŊ_åĪŠčĄŒå†›äš‹į―‘". www.thjunshi.com (in Chinese). Archived from the original on 2015-09-26. Retrieved 2016-04-11.
  2. 1 2 Gunter Dirk Krebs. "CZ-6 (Chang Zheng-5)". Gunter's Space Page. Retrieved 2015-07-02.
  3. 1 2 Gunter Dirk Krebs. "CZ-7 (Chang Zheng-5)". Gunter's Space Page. Retrieved 2015-07-02.
  4. 1 2 Stephen Clark – Arstechnica. "Over the weekend, China debuted a new rocket on the nation's path to the Moon". Retrieved 2025-04-10.
  5. 1 2 3 4 5 6 7 8 9 10 "äļ­å›―新äļ€äŧĢæķēæ°§į…Īæēđ发åŠĻ朚3ïžšYF100/115äļŧčĶį‰đ性 - æ·ąįĐšį―‘". www.shenkong.net (in Chinese). Archived from the original on 2016-03-04. Retrieved 2016-04-11.
  6. 1 2 "Chang Zheng-5 (Long March-5)". SinoDefence. Archived from the original on 2015-07-03. Retrieved 2015-07-02.
  7. 1 2 "Chang Zheng-6 (Long March-6)". SinoDefence. Retrieved 2015-07-02.
  8. 1 2 "Chang Zheng-7 (Long March-7)". SinoDefence. Retrieved 2015-07-02.
  9. ↑ "é•ŋåūäļƒå·įŦįŪ­å‘åŠĻæœšæŠ―įœŸįĐšįģŧįŧŸéĄšåˆĐ通čŋ‡čŊ•éŠŒ (Long March 7 rocket engine system passes vacuum test)" (in Chinese). CASC. Archived from the original on 2015-07-04. Retrieved 2015-07-02.
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