Dismiss Notice
Welcome to IDF- Indian Defence Forum , register for free to join this friendly community of defence enthusiastic from around the world. Make your opinion heard and appreciated.

LCA Tejas Multirole Aircraft

Discussion in 'Indian Air Force' started by Dark_Prince, Apr 14, 2010.

  1. Agent_47

    Agent_47 Admin - Blog Staff Member MODERATOR

    Joined:
    Aug 3, 2011
    Messages:
    2,569
    Likes Received:
    4,843
    Country Flag:
    India
    This spec is comparable to Gripen NG.
    Empty weight : ~ 6600 kg
    MTOW : 15000 kg
    Engine : Kaveri 90-95 Kn

    [​IMG]
     
  2. Sathya

    Sathya Lieutenant FULL MEMBER

    Joined:
    Oct 9, 2016
    Messages:
    700
    Likes Received:
    707
    Country Flag:
    India
    I think it's not ge 414 but Kaveri snecma engine for mark 2
     
  3. HariPrasad

    HariPrasad Lieutenant FULL MEMBER

    Joined:
    Dec 3, 2016
    Messages:
    613
    Likes Received:
    568
    Country Flag:
    India
    Then for what we have ordered GE 414?
     
    Sathya likes this.
  4. HariPrasad

    HariPrasad Lieutenant FULL MEMBER

    Joined:
    Dec 3, 2016
    Messages:
    613
    Likes Received:
    568
    Country Flag:
    India
    8500 against 8100 is a rise of about 5% against which Engine dry thrust increases 20%. i.e 52 kn to 62.5 Kn and that should make Mk2 much better in T/W ratio.
     
  5. vstol jockey

    vstol jockey Colonel MILITARY STRATEGIST

    Joined:
    Mar 15, 2011
    Messages:
    13,248
    Likes Received:
    14,506
    Country Flag:
    India
    The combat weight TWR of Mk1A will be 1.19 for 8100kgs while it will be 1.18 for MK2 for combat weight of 8500kgs. But Mk2 will have higher wing loading. It is very difficult for me to believe that with increased length Mk2 will weigh just 6 tons. It will be minimum 6.2tons with just 50cms increase in length due to airframe and 100kgs due to engine weight.
     
    R!CK, Kane0610, Sathya and 1 other person like this.
  6. Sathya

    Sathya Lieutenant FULL MEMBER

    Joined:
    Oct 9, 2016
    Messages:
    700
    Likes Received:
    707
    Country Flag:
    India
    We have ordered only a small batch, further orders were never placed,.
    By now initial batch should have been delivered . I guess initial delivery were supposed to happen in 2013 December .
    We haven't received it yet . Don't know the current status .

    Similarly there is Snecma Kaveri offset if we had gone for ..
    So the planned re engine option of F404 in older batches is already set to get ready .. Why will go for F414 , when we can have our own engine .

    Either way we have two options .
    If we are using both then I guess
    Kaveri for MK1A and GEF414 for Mk2 LCA
    I hope Kaveri is successful and gets integrated in both.
     
    HariPrasad likes this.
  7. Picdelamirand-oil

    Picdelamirand-oil Lt. Colonel MILITARY STRATEGIST

    Joined:
    Jun 20, 2012
    Messages:
    8,039
    Likes Received:
    5,836
    Country Flag:
    France
    This was the expected specifications to day this has changed

    KEY DATA
    • Length overall 15.2 m
    • Width overall 8.6 m
    • Basic mass empty 8000 kg
    • Internal fuel 3400 kg
    • Max takeoff weight 16500 kg
    • Max thrust 98 kN
    • Min takeoff distance 500 m
    • Landing distance 600 m
    • Max speed at sea level > 1400 km/h
    • Max speed at high altitude Mach 2
    • Supercruise capability: Yes
    • Max service altitude > 52.500 ft
    • G-limits -3G / +9G
    • Hardpoints 10
    • Combat turnaround air-to-air 10 min
    • Full engine replacement 1 hour
    http://saab.com/globalassets/commer...oad-section/facts/gripen-e-fact-sheet--en.pdf

    Finally the airframe is not better than a Mirage 2000
     
    R!CK, HariPrasad, Pundrick and 4 others like this.
  8. vstol jockey

    vstol jockey Colonel MILITARY STRATEGIST

    Joined:
    Mar 15, 2011
    Messages:
    13,248
    Likes Received:
    14,506
    Country Flag:
    India
    Gripen-E is a third rate fighter and I really do not know why some people are peddling it. LCA MK1A with better avionics and reduced weight will be far superior to it any day. In fact many have been misled by its weapon load. With MTOW of 16.5 tons, 8tons empty, 3.4 tons internal fuel, it will have capability to lift only 5 tons of weapon load. This is what Mk1A will lift after reduction in weight. 5.5tons empty, 2.4 tons internal fuel and 13.5 tons MTOW gives a payload of 5 tons. The fuel fraction of Mk1A will be 0.304 compared to 0.298 of Gripen-E.
     
    R!CK, Agent_47, HariPrasad and 6 others like this.
  9. rockstar

    rockstar 2nd Lieutant FULL MEMBER

    Joined:
    May 2, 2011
    Messages:
    228
    Likes Received:
    85
    Whats the Kaveri current thrust and expected thrust with the help of Safran?
     
  10. vstol jockey

    vstol jockey Colonel MILITARY STRATEGIST

    Joined:
    Mar 15, 2011
    Messages:
    13,248
    Likes Received:
    14,506
    Country Flag:
    India
    The figures are not known to anyone but it is expected that it will at least have a thrust similar to F414INS6 or may be more depending on whether it will be flat rated or not. If it is flat rated, it may be limited to about 60/95 other wise I expect it to be around 65/108 level.
     
    R!CK, rockstar, HariPrasad and 5 others like this.
  11. HariPrasad

    HariPrasad Lieutenant FULL MEMBER

    Joined:
    Dec 3, 2016
    Messages:
    613
    Likes Received:
    568
    Country Flag:
    India
    They said that weight is reduced to 6150 kg and target is 6000KG. I believe that it will improve the fitness ratio and wave drag (Because of improvement in length) and other aerodynamic improvement will come from canopy redesign. So Mk2 will be a better aerodynamics plane that should compensate for low wing loading. Of course canopy redesign can be incorporated in Mk1+ also.
     
    Last edited: Dec 29, 2016
  12. HariPrasad

    HariPrasad Lieutenant FULL MEMBER

    Joined:
    Dec 3, 2016
    Messages:
    613
    Likes Received:
    568
    Country Flag:
    India
    I think it is 8.5 and not 9.
     
  13. Picdelamirand-oil

    Picdelamirand-oil Lt. Colonel MILITARY STRATEGIST

    Joined:
    Jun 20, 2012
    Messages:
    8,039
    Likes Received:
    5,836
    Country Flag:
    France
    It's data from SAAB.
     
  14. HariPrasad

    HariPrasad Lieutenant FULL MEMBER

    Joined:
    Dec 3, 2016
    Messages:
    613
    Likes Received:
    568
    Country Flag:
    India
    Ok But what I had read was 8.5.
     
  15. HariPrasad

    HariPrasad Lieutenant FULL MEMBER

    Joined:
    Dec 3, 2016
    Messages:
    613
    Likes Received:
    568
    Country Flag:
    India
    Sir,

    What is the basic problem with Kaveri? Is it the metallurgy which can not handle higher temperature and pressure and thus do not allow the engine to be operated at higher compression ratio or is it design of core which hinder the air flow that restricts the mass flow and hence low thrust?
     

Share This Page