The PLAN LCAC Type 726 Yuyi Class

Discussion in 'Navy' started by Jeff Head, Jun 13, 2011.

  1. Tetrach
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    Tetrach Junior Member
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    1-QD-70 is the civilian version based of the QC-70. Can you please quote me the three versions of the QD-70 that your image stated?

    2-The QC-70 gives 7000kw, its civilian version gives 7200kw. That's the only thing you proved.

    3-Yes I was aware that this text proved that it was in not horsepower. that's why I never spoke about this subject again.

    4-I messed up MW and KW from the beginning !
     
  2. lcloo
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    lcloo Junior Member

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    The statement that QC-70 is under power is not correct. No doubt QC-70 has slightly less power than UGT6000 but the weight of the engine has been reduced from 3 ton to 2.3 ton comparing with UGT6000. The new engine has better thrust to weight ratio.

    "功重比明显提升" = Thrust to weight ratio has obviously been improved.

    我国专门进口了乌克兰曙光机械联合体的UGT6000燃气轮机,但在使用中,UGT6000燃气轮机暴露出两大缺点:一是发动机工作时产生强烈低频振动;二是噪声水平高,中国航空工业集团在国产“太行”航空涡扇发动机的基础上,研发出QC-70型燃气轮机。该型机与乌克兰UGT6000燃气轮机相比,虽在最大功率参数上略低,但机体自重轻得多(从3吨减为2.3吨),功重比明显提升,同时彻底根除了低频振动和高噪声两大恶疾。
     
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  3. PiSigma
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    PiSigma "the engineer"

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    7000千瓦 = 7000kW = 9387 HP. So there is a 6% reduction to the Ukrainian 10k HP... But it is also 1/4 lighter. I say QC70 is better. Especially without the vibrational issues.

    Also, in rotating equipment design, the power, mechanical energy of the equipment actually moves along a curve. The values given for turbines, pumps and compressors are actually based on the point of curve where it is most efficient for operation continuously. The maximum power output or mechanical power provided is not normally given, and unless you have the turbine curve, you won't know it.
     
    #733 PiSigma, Aug 10, 2019
    Last edited: Aug 10, 2019
  4. asif iqbal
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    asif iqbal Brigadier

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    So much discussion on LCAC engines

    Getting nowhere

    Anyone got the proof ? Photo says a thousand words
     
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