GTRE GTX 35VS Kaveri

[Anants]

Can someone explain me why the hell is Kaveri Bypass ratio so small compared to other 4th gen and 5th gen engines?

Kaveri aint 4th gen its at best 3.5. KDE and its derivative shall be 4 and 4.5. Main issue was they tried to design engine around aircraft Tejas. World around its opposite. You design aircraft around engines. Thus consequently GTRE had tight margins to work with. This design was first conceived at a time when GTRE did not really have access to proper computational fluid dynamics (CFD) tools or could refer to substantial legacy wind-tunnel studies.

DRDO’s Kaveri Engine Lessons and Future Prospects for AMCA – Indian Defence Research Wing

idrw.org

 

[TopWatcher]

You are talking about MK1A. Not MK1.

MKIA

 

[Blademaster]

Why core tech from international partner???

I think it's for the high pressure turbine and the AB section.

 

[Aaj Ka Hero]

Can someone explain me why the hell is Kaveri Bypass ratio so small compared to other 4th gen and 5th gen engines?

Because it needs more raw thrust for indian conditions.
Bypass is there to provide efficiency and cooling. According to me in Indian hot and humid conditions, one need whatever thrust it can to come from afterburner whenever needed. Besides it is flat rate design, it needs to maintain desired thrust.
That's what I presume.

 

[Aaj Ka Hero]

Nope. But a hint - we're Jewing it out.

Saala, that's what GTRE was always against, if foreign OEMs get to design core tech then what Indians are doing? Just money providers.
That Indian CEO of Safran was saying indirectly and sometimes directly too(showing desperation) that India must follow Shakti helicopter engine development model.
This lethargy is fully responsibililty of this Modi and Rajnath government, can't even provide a test bed plane here in India for collecting datas.

 

[Azaad]

Don't know if this slide has been shared here but here goes - GTRE's definition of TF generations. A bit outdated if you ask me in terms of material tech or perhaps we're coming to terms with tech denial & our own inability to develop them .

US already has tech which permits 2300°C which goes into their 6th Gen TF , likely 5.5th Gen TF too in the engine upgradation program of the F-35.

France we're given to understand has broken the 2000°C barrier. I'm sure UK isn't too far behind. Both nations will be fabricating TFs with minimum temperature 2000°C TET.

 

[Azaad]

Saala, that's what GTRE was always against, if foreign OEMs get to design core tech then what Indians are doing? Just money providers.
That Indian CEO of Safran was saying indirectly and sometimes directly too(showing desperation) that India must follow Shakti helicopter engine development model.
This lethargy is fully responsibililty of this Modi and Rajnath government, can't even provide a test bed plane here in India for collecting datas.

The choice is stark. We either spend some 10 years at the very minimum realising this tech on a shoe string budget & delay the already delayed AMCA project or pay up get the technology we desire & move ahead with our plans .

The blame lies squarely with the Modi administration more than previous ones for not funding the GTRE adequately to realise tech they couldn't in previous attempts funding the program thru drip feed like previous administrations have done all along including this one .

Alternatively we learn lessons , get the JV quickly , invest in test facilities , identify tech like material tech beyond 2000°C which incidentally we aren't getting thru this JV too & we won't get from any JV , fund those attempts adequately , monitor it closely for progress , such that when we launch the 6th Gen FA program which we should before the end of the decade we utilise the learnings of the forthcoming JV marry it into our own realisation of tech thru these endeavours & develop our own 6th Gen TF instead of moving around the world for another JV for the TF.