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HAL HTFE-25 & HTSE-1200 Engines

Discussion in 'Indian Defence Industry' started by Agent_47, Feb 14, 2017.

  1. PeegooFeng41

    PeegooFeng41 2nd Lieutant FULL MEMBER

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    I wonder if HAL / GTRE have mastered SCB in this engine or this one does not exactly require a SCB.

    BTW at 25 KN thrust and 350 KG weight the Thrust to Weight ratio is
    (25000 / (350 * 9.8)) = 7.29


    Assuming this is dry thrust. Thats better than F 404 and M 88 - 3. Wonder what the wet thrust will be.
     
    Last edited: Feb 25, 2017
  2. vstol jockey

    vstol jockey Colonel MILITARY STRATEGIST

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    The weight will rise as the thrust goes up. I expect the 35-40KN engine to weigh around 450kgs for dry rating and about 550-575 kgs for wet thrust rating making it one of the two engines with TWR of 10:1 in the world.
     
  3. PeegooFeng41

    PeegooFeng41 2nd Lieutant FULL MEMBER

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    Thanks for your inputs. I do wonder though what ever happened to Single Crystal Blade technology. Does HAL have the know how or they found a way to circumvent that or they are buying those blades from some foreign partner(s).

    On a related note, I see they have found ways to use 3D printing technology to fabricate items like plates with honeycomb holes or pieces with internal cavity to keep the weight down. This is interesting. Can this help you in say fabricating control surfaces etc for prototype of something like LSA? Or it is a totally different material which cannot be 3D printed.
     
  4. Aqwoyk

    Aqwoyk Lieutenant FULL MEMBER

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    DSB tech is enough for this category engine imo

    [​IMG]

    Couldn't find the high resolution pic but in the back ground you can see ..................
     
  5. vstol jockey

    vstol jockey Colonel MILITARY STRATEGIST

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    You need SCB tech when you want to raise the turbine inlet temperature to increase thrust. HTFE-25 is designed for lower temperature regime so it probably does not need SCB. Moreover if you look at the by bypass ratio, it is about 0.5. This means that engine is designed to run at low temperatures.
     
    Last edited: Feb 26, 2017
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  6. vstol jockey

    vstol jockey Colonel MILITARY STRATEGIST

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    if we compare HTFE-25 with Honeywell F124 engine, we find that HTFE-25 is lighter by 171kgs. F125 with reheat gives a thrust of 42KN and weighs in at 615kgs. Considering that both engines will need equivalent amount of weight increase to reach 36/57.5kn thrust levels. F125 is supposed to weigh 750kgs while HTFE-35 will weigh about 575kgs.
     
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  7. Abingdonboy

    Abingdonboy Captain Technical Analyst

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    Sadly the upgraded DARIN III Jags will be too long in the tooth to justify being re-engined to the HTFE-25 once the up-rated thrust is achieved.
     
  8. vstol jockey

    vstol jockey Colonel MILITARY STRATEGIST

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    The uprating of thrust for HTFE-25 does not require major hardware changes or to its design. It will need better materials to withstand higher turbine inlet temperatures. HAL has already identified those materials. However, it must be noted that engine has touched its peak power for the thrust it is designed for without any problems. That is a huge success.
     
  9. Abingdonboy

    Abingdonboy Captain Technical Analyst

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    No doubt it is a commdenable effort by HAL sir, just that given the timelines involved the DARIN III Jags can not benefit from such success.
     
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  10. vstol jockey

    vstol jockey Colonel MILITARY STRATEGIST

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    Jags are the only aircraft which will help in certifying this engine and M88 was certified with just 75hrs for fitment in twin configuration for Rafale. We don't need to go to Russia Gramov for testing this engine. We can do it in India itself using Jag. I will put 2020 as the timeline for fitting this engine on Jags
     
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  11. Sathya

    Sathya Lieutenant FULL MEMBER

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    Fadec possible with this engine ?
     
  12. vstol jockey

    vstol jockey Colonel MILITARY STRATEGIST

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    This engine has FADEC.
     
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  13. Sathya

    Sathya Lieutenant FULL MEMBER

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    Initially 20kn is planned , but later higher authorities changed it to 25kn...

    Is it because of flat rating ? Or the 25kn is after flat rating?
     
  14. vstol jockey

    vstol jockey Colonel MILITARY STRATEGIST

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    This engine does not have flat rating. 25KN is for ISA conditions.
     
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  15. Agent_47

    Agent_47 Admin - Blog Staff Member MODERATOR

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    Is it possible to decrease thrust to fit it in IJT. Since it only need ~17kn.

    I couldn't find AL-55i weight for comparison.
     

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