Bharat Rakshak

maitya

<snip> Maityaji, If current Kaveri is close to 50/80kgf at 1024kg weight, it is already close to baseline RD33. In fact wrt tet and weight, it's ahead. https://en.m.wikipedia.org/wiki/Klimov_RD-33 Maybe it's time to stick it into a modified 2 engine Tejas/orca/tedbf airframe that's about 10 tons? T...

maitya

Have added some of my comments/views (in blue ): Here are some historical notes on Kaveri. <snip> 2002 - +3 years IAF cancels plan to use Kaveri for Tejas (at this time there were blade issues and FADEC problems. Some Snecma help was sought, but nothing came to fruition.   2003 - F404 engine chosen ...

maitya

It's 50kN/75kN admiral. Even F404-IN is better. <snip> Now heaven only knows what Safran has proposed to the Indian Govt as part of the AMCA turbofan JV . Could Safran offer to develop the M88-3 and M88-4 as alternatives to the F404 for Mk1A and F414 for Mk2? It is possible, but the question is wil...

maitya

I think, in this hullaballoo, people are missing a very fundamental ask ... there's a need of funding for ALL of the following, concurrently : 1) Flight-Test/Certification of original-K9 OR KDE+A/B (4 Gen TF) 2) Kaveri-II (4.5Gen TF - 90KN) D&D 3) AMCAs 120KN 5th Gen TF D&D, in partnership w...

maitya

DDP MOD - GOI publication - Pt (vi)
So 2nd F404 is scheduled for July'25 ... and then 2/month thereafter ...

maitya

https://x.com/cvkrishnan/status/1925762951706714133 ---> I thought Indian defence discussions, after some initial immaturity would move beyond the, “will GE share us its core engine technology?” , “will Dassault share source codes for its jet?” “Will Naval Group provide its sub data tables?” And no...

maitya

https://x.com/ShiroBarks/status/1917809748549984406 ---> “Our skies must be powered by engines built in India, for India.” • Fast-tracking the Kaveri • Boosting public-private R&D partnerships • Attracting foreign OEMs with co-dev & tech transfer • Developing materials & testing for hig...

maitya

was this posted earlier - https://alphadefense.in/index.php/2025/04/13/key-improvements-in-the-kaveri-engine-by-gtre/ Talks a lot about weight reduction. Blisks for LPC/HPC stages, PMC ducts. Also talks of CMSX-4/TBC usage contributing to slight increases in TeT Nothing in this article that we have...

maitya

... Max we can ask for, is to i) either allow our GaN (Virupaksa variant) AESA be allowed to be included for all 76 (40 +36) platforms - or maybe all ~100 platforms (40 + 36 + 26). ... ... We went through i) with the Indian Navy asking for the Uttam radar on their upcoming Rafale Ms. We were given ...

maitya

From X - @shreedharsingh9 : Jet Engine parts made from CMC materials https://pbs.twimg.com/media/GnZwcU4W0AAjB6r?format=jpg&name=tiny In this context, further details from @shreedharsingh9 in X: Russia's advancements wrt CMC Turbine Blades https://pbs.twimg.com/media/GogvIpyWMAAtkAe?format=jpg&...

maitya

From Air HQ’s perspective, it is a smart move —> Acquire a small number of Rafales and kill the contest. All the contestants want a minimum order of 100 aircraft to setup a production line. To avoid the geopolitical pressure from Trump (forcing India to select a F-teen), just get a follow-on (albei...

maitya

Rakeshji beat me on this ... Again what does such piecemeal acquisitions mean for MRFA? It never made sense for any other contenders to be acquired, but with such piecemeal acquisitions, the Lic-mfg part also fast becoming a non-sequitur. Is MRFA now going to transform into MRSFA, effectively making...

maitya

From X - @vatsalyamaurya : Russia has developed turbine blade and cooling architecture which allows tet upto 2000-2200 k https://pbs.twimg.com/media/GoVKbeTWsAA7scr?format=jpg&name=900x900 From X - @vatsalyamaurya : Materials in various Russian Engines https://pbs.twimg.com/media/GoVKdHSWQAAHz5y...

maitya

^^^^^ Ideal would have been 57 + 26 = 83 Lic Mfg at the 2nd Line, over a 10 year horizon.
(which means 10/year peak rate - plus any addn "offloaded" vol from the current order-book, to take it to 14-16/year peak rate)

maitya

Must be - though I think they are CMSX4 (2nd Gen SX) based, which in turn would mean ~1075-90 deg C raw-metal-temp capability. But do note 1493deg K (1220deg C) TeT, is way too low for a SX-based blades that employs both , film-cooling* (~250deg C adv) and also with TBC (~150deg C adv) - ofcourse, ...

maitya

maitya, the sx blades are from dmrl. Must be - though I think they are CMSX4 (2nd Gen SX) based, which in turn would mean ~1075-90 deg C raw-metal-temp capability. But do note 1493deg K (1220deg C) TeT, is way too low for a SX-based blades that employs both , film-cooling* (~250deg C adv) and also ...

maitya

From X - @shreedharsingh9 : HTSE - 1200 engine https://pbs.twimg.com/media/Gnib7xNakAA7OMg?format=jpg&name=900x900 Key tech points to note: 1) Effusion cooling architecture (but for Combustor) - since HAL engine div is mentioned, it must be the 3D-printed TF component capability from the HTFE pr...

maitya

From X - @shreedharsingh9:

Jet Engine parts made from CMC materials

maitya

https://idrw.org/lt-proposes-indigenous-110kn-engine-development-urges-government-to-back-merit-over-cost/ shreedhar singh @shreedharsingh9 DRDO has assembled and validated the bi-layer YSZ-LZ coated flaps in an aero-engine https://pbs.twimg.com/media/GnStMxqbcAAlLyc?format=jpg&name=tiny Atmani...

maitya

Upping this thread ... I continue to get asked such questions (on X), but given the limitations of X, will try and reply it here: From X - @shreedharsingh9 : Sir ,What is the thermal resistance of LZ -8YSZ compared to pure 8YSZ ?? From X - @sahilsinghop : What will be the TET of Kaveri if we use LZ ...

maitya

Thanks for jogging the memory, remember that. Hindsight says not a good decision. Perhaps we can reconsider. Maybe become part of global supply chain forf404 (is it still widely used?) if that makes the deal more viable? However that still doesn't explain, what I've been advocating for quite some t...

maitya

Wow!! Courtesy @vatsalyamaurya in X: Detailed information on Izdeliya-30/AL-51 , seeing this for the very first time. Simply dazzling level of 5th Gen (they are claiming 5+ Gen, maybe rightly so) TF technological prowess on display - no wonder Russia is so protective about the IP!! Hard to swallow t...

maitya

https://x.com/shreedharsingh9/status/1898306211130278017 https://pbs.twimg.com/media/GlgjcDAXgAEzgVc?format=jpg&name=tiny Advanced technology for AMca engine Again, nothing new, this is one of the slides from Webinar on Aero Gas Turbine Engine Development in India - 2022 , that was posted by Ra...

maitya

Sir, they are for Mk1. Center, Rear & Front fuselage were all delivered by private vendors. Mk1A would have some changes but shouldn't be very different. Actually that's where the confusion is: All along, for the Mk1 deliveries, we have known Alpha Tocol, VEM Industries, TASL et all have been p...

maitya

HALs Nashik unit to roll out first Light Combat Aircraft MK1A by April end

Other than the headlines, nothing special in the news item wrt MK1A, except for:
1) The Nashik Line has been idle from 2019-20 onwards
2) It took only 150Cr to setup this assembly line - must be a typo!!

maitya

And now From X @ShiroBarks: Center Fuselage by VEM Technologies Sir, they are for Mk1. Center, Rear & Front fuselage were all delivered by private vendors. Mk1A would have some changes but shouldn't be very different. Actually that's where the confusion is: All along, for the Mk1 deliveries, we...

maitya

Blisk Compressor Stage - by @shreedharsingh9 on X

maitya

maitya wrote: ↑12 Mar 2025 19:54
ajay_hk wrote: ↑09 Mar 2025 22:38 First rear fuselage for LCA Mk1A made by Alpha Tocol Engineering handed over to HAL in Bengaluru

...

Here's a closeup of this rear-fuselage: From X @ShiroBarks: Mk1A Rear Fuselage

And now From X @ShiroBarks: Center Fuselage by VEM Technologies

maitya

Maitya Given that both rr&Safran are ahead of us in tech capability, what 'co-development' will actually happen and how much will we absorb from them if they develop the core and we do the lp and ab sections? Foreign oems developed new alloy compositions for new engines and engine related impro...

maitya

maitya ji, we need to become a bit more proactive in this regard, instead of expectantly waiting open mouthed under some random mango tree and hoping against hope that a ripe, juicy, sweet and succulent mango (complete TOT for the latest military jet engine) will miraculously fall into the aforemen...

maitya

Russia’s Tit for Tat to F-35 Offer. Offers the most powerful AL-41 Engine from Su-57 Fighter Jet to India for the Su-30 MKI Russia offers Sukhoi-57 engine for India’s Sukhoi-30MKI upgrade https://www.tribuneindia.com/news/india/russia-offers-sukhoi-57-engine-for-indias-sukhoi-30mki-upgrade/ 12 Feb ...

maitya

Arihant_Ray on X: Astra BVR aam will be test fired from Tejas mk1A within the next 15 days Why HAL give timeline when they can't meet. Though this news-item has been already posted in the MK1 thread, still posting here to understand it's relevance wrt Mk1A ... Tejas combat jet test-fires Astra miss...

maitya

https://x.com/shreedharsingh9/status/1897745980914831746 ---> New fan for Kaveri and its specifications. ... Small correction, pls note this is NOT for K9 or KDE ... the specifications (both inlet-mass-flow and Fan PR) are for a 5-gen TF with a much larger inlet geometry (may be for AMCA). Pls refe...

maitya

Maitya ji, I have a question... I remember reading a rumor that we had Al 31 engine shortage during late 22 and early 23s. We had used our knowledge gained on Kaveri to manufacture spare parts. I am not sure whether this is true or not, but can't we use this at least to improve the quality of RD - ...

maitya

First rear fuselage for LCA Mk1A made by Alpha Tocol Engineering handed over to HAL in Bengaluru The first rear fuselage for Light Combat Aircraft Mk1A, produced by Indian Private Industry, Alpha Tocol Engineering Services Private Ltd, was handed over on Sunday to Hindustan Aeronautics Limited (HAL...

maitya

I'm not sure who is ready to part the Tech that we want (are lacking) , as those tech are either non-existent (e.g in M88-2 or EJ200 etc) or are available only in a handful of latest gen products of global OEMs (e.g. F135, Izdeliya-30 etc) Are we alluding to that somehow these OEMs will gleefully si...

maitya

^^ It was discussed in Episode 36 : IAH with Saurav Jha 09 March 2025 | On The IAF's Plans To Restore Its Squadron Strength EJ200 can be an alternative to 404/414s. ... Nope ... EJ200 (or even M88-2) can be a substitute for F404 (actually much better) but not in F414 levels - in fact, there're no o...

maitya

... Right, Afterburner should have been relatively easier than the TF core - however the expectation/specification is over the top - it's 60% thrust augmentation but with a mass-factor of 1.1 . Most TFs aim for 50%, which is what K9 also achieved - but 60% up-thrusting is where M88-2/EJ200/F414 lev...

maitya

.... Thanks!! Maitya sir, another related question related to kaveri. Dry Kaveri works fine. It achieved it design goal. The dry thrust is very similar to f 404 in 20. The afterburner is mostly fuel injectors and the thermal lining. If I were to put a %, 90% of the tech is till the dry engine worki...

maitya

... T/W ratio is not really impacting overall weight as such. ... The T/W more or less dictates how efficient is the engine. ... I think, this is 400% correct ... T/W ratio is nothing but one (of the many) measure of efficiency of the TF - and provides probably the closest understanding about the t...

Search found 838 matches