Bharat Rakshak

maitya

And the second one from the same thread : I think many here are not reading the posts carefully enough ... so the questions, that have been already answered for, keep coming up. The current dry-Kaveri version is a K9 variant, and that is the only currently officially funded program (of Kaveri genre)...

maitya

Upping this thread with a cross-post from the LCA Mk2 thread : There are limited paths India can take now; * Import F414 turbofans directly from the US. More expensive route, but that is what is available. Your leverage is entirely in the US' hands. ..... * Get a clean sheet turbofan design (minimum...

maitya

I think many here are not reading the posts carefully enough ... so the questions, that have been already answered for, keep coming up. The current dry-Kaveri version is a K9 variant, and that is the only currently officially funded program (of Kaveri genre) in GTRE. This dry version of the Kaveri, ...

maitya

There are limited paths India can take now; * Import F414 turbofans directly from the US. More expensive route, but that is what is available. Your leverage is entirely in the US' hands. ..... * Get a clean sheet turbofan design (minimum a decade) and install it on the Tejas Mk2. Along this path, g...

maitya

So summarising desi turbofan design and development effort, we are at: 1) As we all know the Dry-Kaveri (for UCAV application) was based on baseline K9 version but with a new redesigned Fan . - Godrej was chosen to develop all the modules for 7-8 test engines required for certification of this engin...

maitya

Upping the thread ... Now now now ... when did this happen? India Can Fly Indigenous Light Combat Aircraft Tejas With Swadeshi Kaveri Engine: Dr Tessy Thomas In the context of the above, it seems this news item Exclusive | Indigenous Engine of Tejas on Its Way has been missed here. Some relevant quo...

maitya

Deleted, double post ...

maitya

Not sure where to post this video, so posting it here ... India Is Ready To Fight War Of Technology! DRDO ECS At Aero India 2023 Fanneji, pls focus on 8:56 onwards, specifically around 9:15 or thereabouts ... he specifically says, and I quote, " ... we have gone from LDMOS to GaAs to GaN ... &q...

maitya

such a wonderfully informative post, Maityaji! Thank you for the detailing. My expertise is with radars, so not familiar with the engine & materials side of things beyond the basics. K PRASAD JI, few questions on radar, (answer can go in the appropriate thread), also since you get to talk the p...

maitya

On a related note, pls refer to this HTSE poster (posted by Rakeshji in the AI'23 thread) ... It says SC HPT Blades + EVPVD Coating but a 1493K TeT for the HPT ... which should be a food-for-thought for us in BRF. So about 400-800 K below state-of-the-art. Snecma M-88 TeT is 1850 K (probably higher...

maitya

Now now now ... when did this happen?
India Can Fly Indigenous Light Combat Aircraft Tejas With Swadeshi Kaveri Engine: Dr Tessy Thomas

maitya

A Deshmukh wrote:
maitya wrote:1493K TeT = 1220 deg Centigrade

Your point being? Pls could you elaborate.

maitya

On a related note, pls refer to this HTSE poster (posted by Rakeshji in the AI'23 thread) ... It says SC HPT Blades + EVPVD Coating but a 1493K TeT for the HPT ... which should be a food-for-thought for us in BRF. Something that has been discussed multiple times in the forum, wrt that it's not so mu...

maitya

Maitya, What are these modules for dry Kaveri? Are they subsystems or the entire engine? Any "Dry version" of a turbofan would essentially mean the Core + Fan i.e. major subsystems would be: 1) Core - HPC, Combustor, HPT Vanes, HPT itself (so both blades and disk - aka the holy grail, per...

maitya

I am still amazed by the fact that there is no space inside the gigantic Flanker for an internal EW system when the much smaller M2k, Jag and even the Mig-29 UPG now have that capability. And this is not a case of HAL/DRDO being unable to do it since the Russians themselves opted for the wingtip mo...

maitya

<snip> The manufacturing will be similar to the Saturn AL-31FP turbofan that HAL did for the Su-30MKI <snip> Yes Yes Yes ... there'll be 100%, what-was-that-term, oh yes, " manufacturing from raw material " of the GE F-414, just like the way it is done for AL-31FP. :rotfl: :rotfl: :rotfl:...

maitya

Made-in-India GE jet engines sought in closer US security ties https://economictimes.indiatimes.com/news/defence/made-in-india-ge-jet-engines-sought-in-closer-us-security-ties/articleshow/97505765.cms 01 Feb 2023 Here we go again ... the tamasha never stops, I guess. :shock: If the mai-baap allows ...

maitya

<snip> Maitya I am just reporting my observations having listened to those podcasts so chill and don’t get your knickers in a twist. They dont want to order more MK1s so there!!! Dont also have to reitrate stuff we have all gone through ad nauseam! No problem ks_sachinji ... actually the only reaso...

maitya

In any case, if MK2 is delayed, IAF should (through their own free will or making them walk long and become thirsty, but do it now please) order some 60-80 mk1a more. That may lead to one more assembly line. They wont. I don’t think their doctrine for future air combat will allow it. Purely my obse...

maitya

As they say, when Cat is away the mouse will play ... with SHQ not in for better part of the day, there's this luxury of typing out 2 BR posts in a day :twisted: Have meant to type this out for many years now, finally got a chance ... please read it, if you have to , at your leisure onlee. So, here ...

maitya

Ah, got some b/w today, so couldn't resist posting ... :mrgreen: :mrgreen: @mody, So, what is the US offering? She is offering what India wanted in the DTTI negotiations: which is the co-development of an engine - with the GE F414-400 (98kn) as the baseline. Per wiki (not my fav source for anything)...

maitya

...<snip> Details of the TOT offer by GE for "Co development" of Engine: -Essential components of the core engine will come directly from GE -HAL will be given TOT for Compressor Disk and Case, Compressor spool, hub seals and after burner section - GE will supply engines in semi assembled...

maitya

... To further add to what Sachin said, the IBG will contain all elements of a modern fighting unit ---> infantry, artillery, armoured and the logistics required to support all this. ... ... and shouldn't attack helicopters be integrated as a part of the Artillery unit of an IBG, and support helico...

maitya

^^ Yep, here's one such old news item ...

maitya

^^ Isn't ELTA-2052 sets are already flying in DARIN-III upgraded ones?

maitya

Mods, just realised that, haven't posted quite a few of Turbofan Tech related materials (in form of my old posts), to the Kaveri Saga thread - which was supposed to be a one-stop place for most of the info wrt Kaveri/Kabini indigenous Turbofan tech. So want to plug in a few such materials, especilly...

maitya

... But I've digressed again, but since already done, so let me add just one more point (a question) to it: viz. being a product of an global turbofan producing powerhouse, why on earth would the TeT of the mighty AL-31F be limited to 1300deg C etc, while a pure-SDRE Kabini manages 1455deg C? Hain ...

maitya

If I understood you correctly, Kaveri/Kabini (using DS blades) with LZ <=YSZ<=bond coat<= substrate allows for 1455 C TeT degree operation (LS and YSZ take the *heat* and substrate runs coolly at 1050C ) :wink: . Correct? And I think what you are saying is that the same LZ...YSZ recipe can be used ...

maitya

Recent Indian Developments in Thermal Barrier Coatings For Jet Engines https://delhidefencereview.com/2022/06/26/recent-indian-developments-in-thermal-barrier-coatings-for-jet-engines/ 26 June 2022 Rakeshji, this is a highly technical paper (must be an excerpt from an Journal etc), need good backgr...

maitya

Recent Indian Developments in Thermal Barrier Coatings For Jet Engines https://delhidefencereview.com/2022/06/26/recent-indian-developments-in-thermal-barrier-coatings-for-jet-engines/ 26 June 2022 The article looks like paper that is published in Material engg journal . TeT of 1200 C (1473K) seems...

maitya

And just to re-iterate, before somebody starts shouting about employment-opportunity in States being reduced etc, the operative part was in "special" police force of states (as opposed to employment in regular State police force). You are suggesting to take away a state's right to manage ...

maitya

... Answering my own post, some data: <snip> Available for General Public .......... 19,100 (after full absorption of de-mobilised Agneevers) ... <snip> I see some Vets on SM being supportive of the scheme but insisting that it be first backed by a law (for reservation). Isn't that what I said abov...

maitya

<snip> Actual point is this ... the whole dis-affection is wrt no assurance wrt post de-induction job security , rest are all mere side-shows/fluff. And no, announcements like 10% reservation etc in CAPF etc means zilch ... instead, a law* is required which ensures all Agneevirs, post-demobilisatio...

maitya

By Admiral Arun Prakash (Retd), Former CNS. Arun Prakash writes: Agnipath, between the lines https://indianexpress.com/article/opinion/columns/agnipath-scheme-armed-forces-protests-7979936/ Turmoil points to two larger absences: India doesn't have a National Security Doctrine. Armed forces have rem...

maitya

<snip> The US has a culture of risk. India does not. Lives and materials were lost to reach the moon. It has been posted on BR that a single LCA crash could have terminated the program. ... ... Risk Costs money And, you have to throw money at the problem The problem with China is that they want res...

maitya

Here we go again ... GTRE was formed mostly with HAL Engine division folks, back in 1980s etc ... <snip> Just go back and read AI reports by brfites from 15 years ago. I can still remember Kartik's post recollecting Mohan Rao's ( i think) impassioned plea for understanding of GTRE's situation from a...

maitya

Reports are there they are developing a 98 kn version of kaveri as per tweets posted by Rakesh. I don't think this is officially confirmed. 98KN (Wet) implies ~70KN (Dry) - “Yamuna”, anyone? :mrgreen: However, I don't think it's possible to “upgrade” the present Kaveri-Core (of 51KN/80KN rating) to...

maitya

FWIW.... https://twitter.com/defence_in/status/1481870985221615618?s=20 ---> Presently all the R&D is focused on making a 98kN thrust Kaveri Turbofan whose LP/HP shafts needs to be optimized and synchronized with the gearbox. https://twitter.com/defence_in/status/1481873057803386883?s=20 ---> T...

maitya

X-posting from the forum-feedback page: <deliberate snip> But in the larger vein of true-atmanirbharata, are we to throw simple logic out the window? I see a number of posters talking about immediately retiring all the MiG-21s and replacing them with Tejas, not realizing that any order for additiona...

maitya

Rakeshji, I see plethora of posters making multitude of allegations that they are unable to prove , albeit those are made against desi-kalluram-infested orgs, striving to deliver desi products, only to be rebuffed by the merry-go-round of "tests", to ensure gora-TFTA products get a chance ...

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