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  1. 1

    Suresh Rao

    IAF and HAL have acquired 260 Su-30MKIs which are powered by 2 AL-31F Engines. So HAL has or should have had sufficient experience with the AL-31F jet engines. It is a real mystery why the HAL and NAL/ADA have opted for the less powerful GE’s F414 engines with a maximum power output of 98kN. If HAL were to use the AL-31F engines with a maximum power output of 127Kn it will become a true medium weight fighter which can effectively and very comfortably replace even the Mirage 2000s. This will also match the Chinese J-10 and will give IAF a more power jet fighter which will also save IAF on R&M and spares as IAF technicians are already familiar with the AL -31F engines for nearly 2 decades. Can anyone throw light on the folly of HAL/IAF , please?

    1. 1.1

      Ajay Sharma

      Hands down the choice of the GE F404 was much better. American engines are very reliable- in a single engine fighter this becomes even more important. Also why the su 30 has had many engine flameouts and other issues while Texas has t had any issues on this front.

    2. 1.2

      Raj Swamy

      Because the AL31F is 3ft longer, almost a ft wider, and half a ton heavier. I think the folly lies with you not looking at the specs.

    3. 1.3


      Suresh Rao, Tejas Mk.1 itself can replace the Mirage-2000s, given it’s light weight due to use of composite structures. Just compare the payload and range specifications of Tejas Mk.1 with Mirage-2000 in all combat configurations. You’ll see they’re very similar.

      Tejas Mk.2 will have GE-F414 engines because these engines are of almost same dimensions as the earlier GE-F404. So, minimal design changes will be needed in Tejas Mk.2. Had we opted for the larger Al-31F, much more significant changes would’ve been needed in the layout of Tejas Mk.2.

    4. 1.4


      Reliability issue, when you make single jet engine plain you need more reliable engine, also integration with frame is also issue


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