Chinese Engine Development

Discussion in 'Air Force' started by jackbh, Sep 14, 2005.

  1. Klon
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    Klon Junior Member
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    WS-10 reliability statistics potentially revealed.
     
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  2. Totoro
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    Totoro Senior Member
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    As always, what is the credibility of the source claiming them?

    And, as importantly, can someone actually translate them? As software translation of that page leaves a lot (almost all) to be desired.
     
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  3. Klon
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    Klon Junior Member
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    From what I can see, the source is an academic paper about the performance of a certain engine, which should be the WS-10. cjdby is down now, but from what I remember from reading the thread, the value for IFSD is ten times that of comparable American engines.
     
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  4. Hendrik_2000
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    Hendrik_2000 Brigadier

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    Via Vincent Here is the link

    A paper on the reliability and maintainability of an engine in tropical climates:


    Paywall
    某型发动机亚热带岛礁气候下的可靠性分析与保障

    Free
    某型发动机亚热带岛礁气候下的可靠性分析与保障

    MTBF: Mean Time Between Failure (target is 150 hours)
    IFSD: in-flight shut down (target is 0.1/1000 flight hours)

    表 2 发动机 MTBF 和 IFSD 随工作时间变化情况
    年度 20** 20** 20** 20** 20**
    MTBF 48.54 78.76 90.18 95.55 104.4
    IFSD 13.07 2.68 2.27 1.85 2.01

    在统计的发动机各类技术质量问题当中,主机故障主要集中体现在振动超标、进气机匣壳体裂纹、整流板裂纹和尾喷管作动筒漏油等方面;传动润滑系统故障集中体现在滑油金属含量超标、磁力密封装置和皮碗漏油、滑油泵组调压活门卡滞等方面;控制系统故障集中体现在燃油增压泵漏油和传感器虚警等方面。

    Main issues are:
    • Excessive vibration
    • Cracks in the air-intake housing
    • Cracks in the rectifying plate
    • Nozzle lubrication leaks
    • Lubrication oil issues
      • Metal particles in the lubrication oil exceeds limits
      • Magnetic seal
      • Pump valves
    • Control system - Fuel pressure system sensors and false alarms
     
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  5. Figaro
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    Figaro Junior Member
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    And how do you know this is WS-10?
     
  6. ZeEa5KPul
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    ZeEa5KPul New Member
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    Is the paper about the original WS-10 or the A/B/X variants?
     
  7. Klon
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    Klon Junior Member
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    I don't know anything, that was what some said on cjdby. As for how they came to the conclusion, I imagine similarly to any other case of identifying unnamed weapons in official reports, basically by seeing what fits best. For example, China doesn't have that many engines, the timeline works, etc.
     
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  8. by78
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    by78 Captain

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    Thank you for the legwork. I wish cjdby were more reliable; it seems to be down at least half a dozen times a week.
     
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  9. Figaro
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    Figaro Junior Member
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    From 飞舞的摩羯, the reliable Weibo poster who revealed a lot of key engine breakthroughs through his drawings.
    https://www.weibo.com/6433673288/Gn...&mod=weibotime&type=comment#_rnd1530761174501
    From what I could gather, this snippet says that 624 has solved the vibration problem associated with domestic engines and that the WS-15 is progressing excellently. If I recall, there was a press release by Shenyang last year which stated that their most important project (presumably the WS-15) had some vibration issues ... so pretty major breakthrough if true.

    Update ...

    Here is the link to the original article from the official CCDI department. The portion in quotes talks about the breakthroughs made in vibration issues.
    http://www.ccdi.gov.cn/lswh/renwu/201806/t20180628_174629.html

     
    #4729 Figaro, Jul 5, 2018
    Last edited: Jul 5, 2018
  10. latenlazy
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    latenlazy Major

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    Huh. Why is this being issued through the CCDI?
     
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