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by JayS
15 Nov 2019 12:51
Forum: Military Issues & History Forum
Topic: Tejas Mk2 Medium Weight Fighter: News & Discussion - 23 February 2019
Replies: 437
Views: 108307

Re: Tejas Mk2 Medium Weight Fighter: News & Discussion - 23 February 2019

75/110 unless its changed recently. Are you sure? That would give it the same dry thrust as an AL-31F! :shock: 2 of these babies on the AMCA would make it a hotrod on mil-power alone. 30kN more thrust dry than the F-35. Sounds too good to be true honestly. How is GE going to extract 17kN extra dry ...
by JayS
14 Nov 2019 23:25
Forum: Military Issues & History Forum
Topic: Tejas Mk.1 & Mk.1A: News & Discussions: 23 February 2019
Replies: 1459
Views: 416597

Re: Tejas Mk.1 & Mk.1A: News & Discussions: 23 February 2019

chetak wrote:


quite a while back, on the forum, i had suggested trying to get help from volvo for the kaveri.

they have the expertise and the RM12 work is all their own, even though they actually started out with an ameriki engine.


Please check DM.

Now, lets get back to the topic.
by JayS
14 Nov 2019 23:17
Forum: Military Issues & History Forum
Topic: Tejas Mk.1 & Mk.1A: News & Discussions: 23 February 2019
Replies: 1459
Views: 416597

Re: Tejas Mk.1 & Mk.1A: News & Discussions: 23 February 2019

Where are you getting this kind of information? Have you actually worked on RM12 project..? No. But I do know how to read english. I don´t know if you can read swedish but this link https://techworld.idg.se/2.2524/1.174315/reaktionsmotor-12---bade-vacker-och-stark clearly states I was saying. Av de...
by JayS
14 Nov 2019 22:11
Forum: Military Issues & History Forum
Topic: Naval Tejas Mk1/Mk2: News & Discussion - 23 February 2019
Replies: 407
Views: 107441

Re: Naval Tejas Mk1/Mk2: News & Discussion - 23 February 2019

F/A 18 is also designed for the same req as NLCA. Typical sink rate is 4.x m/s or 700ft/min and max designed is 7.1m/s or 1500ft/min. The glide path would set the usual sink rate and max pitch rate added to it would give 7.1m/s. We are following Mil Standard so we are no more conservative in design ...
by JayS
14 Nov 2019 10:23
Forum: Military Issues & History Forum
Topic: Naval Tejas Mk1/Mk2: News & Discussion - 23 February 2019
Replies: 407
Views: 107441

Re: Naval Tejas Mk1/Mk2: News & Discussion - 23 February 2019

^^ This shows that the recent campeign was a grand success and ADA dont see need for any significant changes in control laws which would have needed reverification. The control laws are well sorted now. Lets end the year with a bang.
by JayS
14 Nov 2019 03:48
Forum: Military Issues & History Forum
Topic: Naval Tejas Mk1/Mk2: News & Discussion - 23 February 2019
Replies: 407
Views: 107441

Re: Naval Tejas Mk1/Mk2: News & Discussion - 23 February 2019

^ +1. 7.1m/s (or 1500 ft/min) is physically difficult or even impossible to achieve at STBF. That sink rate is designed max operational load considering extreme pitching of the deck. In normal usage, the sink rate is around 4.x m/s or 700 ft/min and there is little variation in it, if deck is assume...
by JayS
14 Nov 2019 03:39
Forum: Military Issues & History Forum
Topic: Tejas Mk.1 & Mk.1A: News & Discussions: 23 February 2019
Replies: 1459
Views: 416597

Re: Tejas Mk.1 & Mk.1A: News & Discussions: 23 February 2019

The Volvo Aero RM 12 is a variant of the GE F404, produced under license in Sweden. See below.... https://www.geaviation.com/sites/default/files/datasheet-F404-Family.pdf Still, its not F404. The RM12 contains over 50% Volvo Aero specifically designed an produced parts by hence company. Actually th...
by JayS
13 Nov 2019 17:33
Forum: Military Issues & History Forum
Topic: Tejas Mk.1 & Mk.1A: News & Discussions: 23 February 2019
Replies: 1459
Views: 416597

Re: Tejas Mk.1 & Mk.1A: News & Discussions: 23 February 2019

Wickberg wrote:The Gripen C does not use a GE F404. It uses the Volvo Aero RM 12.


Pa-te-to Po-ta-to... :P
by JayS
13 Nov 2019 17:30
Forum: Military Issues & History Forum
Topic: Advanced Medium Combat Aircraft: News & Discussion - 30 August 2019
Replies: 299
Views: 50006

Re: Advanced Medium Combat Aircraft: News & Discussion - 30 August 2019

Please do not start a naming contest now in this thread. AMCA has time for that. Go to HTT-40 thread instead. LOL From Sjha article its next generation carrier-based fighter slated to be developed under the Twin-Engine Deck Based Fighter (TEDBF) programme. I will hazard a guess that it is a iterativ...
by JayS
13 Nov 2019 00:03
Forum: Military Issues & History Forum
Topic: Advanced Medium Combat Aircraft: News & Discussion - 30 August 2019
Replies: 299
Views: 50006

Re: Advanced Medium Combat Aircraft: News & Discussion - 30 August 2019

25T MTOW. 6.5T internal fuel.

Full spectrum TDs. DSI fixed.

Likely HAL lead consortium manufacturing AMCA.

Many other interesting things.

But don't take them as things set in stone. Thinks will remain fluid for next 4-5 yrs.
by JayS
12 Nov 2019 13:25
Forum: Military Issues & History Forum
Topic: India's R&D in Defence DRDO, PSUs and Private Sector
Replies: 3855
Views: 535810

Re: India's R&D in Defence DRDO, PSUs and Private Sector

I haven't ever heard of Kemrock producing Carbon fibre in large quantities. At least no composite manufacturer I know uses them. Also to be noted that BPJs would probably need high grade phenolic resins, which are not made in India either. Well, if the company was in financial straits and has only ...
by JayS
11 Nov 2019 15:51
Forum: Military Issues & History Forum
Topic: Kaveri & Aero-Engine: News & Discussion
Replies: 4998
Views: 961690

Re: Kaveri & Aero-Engine: News & Discussion

Just to put things in perspective, I remember to have read that the OLED screens had about 16-18% yield that too with repairs, and that was key reason that they were not coming up in TV space. This was a few years ago. Now the manufacturing must have been fine tuned. Engineering is all about doing i...
by JayS
08 Nov 2019 18:53
Forum: Technology & Economic Forum
Topic: Indian Economy News & Discussion - Nov 27 2017
Replies: 4042
Views: 750717

Re: Indian Economy News & Discussion - Nov 27 2017

This Liquor related Sugarcane cultivation is the main reason for the Cauvery crises as Both Karnataka and TN both grow lots more sugarcane which 100 years ago was mainly grown for Jaggery in cooking. Similarly in Maharashtra this has been main reason for farmer distress. And by you know the Sugar M...
by JayS
06 Nov 2019 02:16
Forum: Military Issues & History Forum
Topic: International Aerospace Discussion - Jan 2018
Replies: 1257
Views: 219305

Re: International Aerospace Discussion - Jan 2018

Being at the mercy of governments in Germany, France and Spain and expecting a glitch free political process over the 2+ decade developmental timeframe for this project, does seem quite risky. Exactly my initial thoughts on the FCAS timeline. 2-2.5decades for EIS is is a long time. There are multip...
by JayS
05 Nov 2019 18:32
Forum: Military Issues & History Forum
Topic: International Aerospace Discussion - Jan 2018
Replies: 1257
Views: 219305

Re: International Aerospace Discussion - Jan 2018

Good to see a different form. Is it a subsonic aircraft..?? Looks like one from the design. But well, frankly there aint any such supersonic drones AFAIK. So its probably a foregone conclusion.
by JayS
05 Nov 2019 14:58
Forum: Military Issues & History Forum
Topic: Indian Missiles News & Discussions - 17 Dec 2018
Replies: 1887
Views: 496666

Re: Indian Missiles News & Discussions - 17 Dec 2018

Is Brahmos Nuclear capable..?
by JayS
05 Nov 2019 14:52
Forum: Military Issues & History Forum
Topic: Advanced Medium Combat Aircraft: News & Discussion - 30 August 2019
Replies: 299
Views: 50006

Re: Advanced Medium Combat Aircraft: News & Discussion - 30 August 2019

^^ We will have a good number of Super 30 lasting into 2050s. Only a couple of sq are sufficient for such missions which will be needed rarely, it at all. Where are we going to send them for Air patrol over such long range...? Nobody does air patrol over thousands of kms out from home base. It has t...
by JayS
05 Nov 2019 08:41
Forum: Military Issues & History Forum
Topic: Advanced Medium Combat Aircraft: News & Discussion - 30 August 2019
Replies: 299
Views: 50006

Re: Advanced Medium Combat Aircraft: News & Discussion - 30 August 2019

Those specs from Defexpo 18, indicate that the internal fuel would be limited to 6T max in best case scenario (20T - 12T - 0.5T - 1.5T). The Super Hornet is bigger than AMCA and manages in 14.5T empty weight. Given the smaller size and more composites, 12T seems doable. May be 12.5T worst case. AMCA...
by JayS
04 Nov 2019 18:52
Forum: Military Issues & History Forum
Topic: Indian Missiles News & Discussions - 17 Dec 2018
Replies: 1887
Views: 496666

Re: Indian Missiles News & Discussions - 17 Dec 2018

It was a logical extension, good to see them exploiting Brahmos fully. from the article: Sharing that the idea of integrating the Brahmos NG with the LCA came from Defence Secretary Sanjay Mitra, the CEO said that the weapon will give a competitive edge to the LCA when it comes to export order. :rol...
by JayS
04 Nov 2019 16:51
Forum: Military Issues & History Forum
Topic: Indian Missiles News & Discussions - 17 Dec 2018
Replies: 1887
Views: 496666

Re: Indian Missiles News & Discussions - 17 Dec 2018

Any news on the NOTAM 3500km in the end of Oct..?? Or was it postponed?


Re, LRGB, I hope the bombs are very close to production, after 5-6yrs spent on AGB, and we are not looking at another 3-4 yrs for development.

I wonder why the change in names.
by JayS
04 Nov 2019 16:46
Forum: Military Issues & History Forum
Topic: Advanced Medium Combat Aircraft: News & Discussion - 30 August 2019
Replies: 299
Views: 50006

Re: Advanced Medium Combat Aircraft: News & Discussion - 30 August 2019

The argument that 5th generation requirements enforce suboptimal aerodynamics is a 4th Gen vs 5th Gen aircraft comparison. Question is if for identical requirement, if one designs a 4th gen aircraft and one 5th Gen aircraft, for same combat configurations which one will have lesser drag.? Do you th...
by JayS
04 Nov 2019 15:12
Forum: Military Issues & History Forum
Topic: Advanced Medium Combat Aircraft: News & Discussion - 30 August 2019
Replies: 299
Views: 50006

Re: Advanced Medium Combat Aircraft: News & Discussion - 30 August 2019

Indranil, all great points and thanks for your insight. A few replies - 2. IAF is not thinking of AMCA as a replacement for an aircraft or set of aircrafts. Frankly, there are no airplanes in IAF's inventory which does AMCA's role, albeit stealthily. Rafale is just entering service and too few in n...
by JayS
01 Nov 2019 02:38
Forum: Military Issues & History Forum
Topic: Advanced Medium Combat Aircraft: News & Discussion - 30 August 2019
Replies: 299
Views: 50006

Re: Advanced Medium Combat Aircraft: News & Discussion - 30 August 2019

The argument that 5th generation requirements enforce suboptimal aerodynamics is a 4th Gen vs 5th Gen aircraft comparison. Question is if for identical requirement, if one designs a 4th gen aircraft and one 5th Gen aircraft, for same combat configurations which one will have lesser drag.? Do you thi...
by JayS
01 Nov 2019 00:21
Forum: Military Issues & History Forum
Topic: Advanced Medium Combat Aircraft: News & Discussion - 30 August 2019
Replies: 299
Views: 50006

Re: Advanced Medium Combat Aircraft: News & Discussion - 30 August 2019

I think it matters. Also, I believe it is a strawman to say internal volume means compromised aerodynamics. The internal volume of Su-35/PAKFA/F-22 is more than that of a F-35, is there a compromise in aerodynamics? Yes stealth shaping comes with compromise, but that is not as big a detriment. In o...
by JayS
31 Oct 2019 23:50
Forum: Military Issues & History Forum
Topic: Tejas Mk.1 & Mk.1A: News & Discussions: 23 February 2019
Replies: 1459
Views: 416597

Re: Tejas Mk.1 & Mk.1A: News & Discussions: 23 February 2019

Looking at the Mangalyaan movie recently, I'd rather prefer a book. Air Marshal Philip Rajkumar's book is a must read. I wish someone came out with an authoritative account like that of the period post the first TD's flight. Amazon link I have the book. But it throws minimal light on the happenings...
by JayS
31 Oct 2019 17:51
Forum: Military Issues & History Forum
Topic: Advanced Medium Combat Aircraft: News & Discussion - 30 August 2019
Replies: 299
Views: 50006

Re: Advanced Medium Combat Aircraft: News & Discussion - 30 August 2019

What is 80-90K? Should be 80K feet. I believe F22 are capable of operating at 100K ft, so a AMCA capable of 80K ft would be a good achievement. Where are you getting these figures..? That's way to high altitude. F-22's service ceiling is 65000ft as per wiki. And AMCA will not be able to achieve suc...
by JayS
31 Oct 2019 16:52
Forum: Military Issues & History Forum
Topic: Tejas Mk.1 & Mk.1A: News & Discussions: 23 February 2019
Replies: 1459
Views: 416597

Re: Tejas Mk.1 & Mk.1A: News & Discussions: 23 February 2019

Looking at the Mangalyaan movie recently, I'd rather prefer a book.
by JayS
31 Oct 2019 16:49
Forum: Military Issues & History Forum
Topic: Advanced Medium Combat Aircraft: News & Discussion - 30 August 2019
Replies: 299
Views: 50006

Re: Advanced Medium Combat Aircraft: News & Discussion - 30 August 2019

Sorry, but how exactly F35 (or any other aircraft for that matter) having or not having super cruise capability even relevant for AMCA..?? What matters is, whether it can manage to fulfil IAF SQRs without Super cruise or not. ADA says it does, more or less. So that should be the end of it. F35 is de...
by JayS
31 Oct 2019 16:43
Forum: Technology & Economic Forum
Topic: Indian Economy News & Discussion - Nov 27 2017
Replies: 4042
Views: 750717

Re: Indian Economy News & Discussion - Nov 27 2017

^^ 7300 MBBS graduates unemployed, how is that even possible, given such low density of doctors and such high demand for them in the country...? On top of it they can always open clinic. Google tells me, KL has population of ~3.5Cr. Lets say 65% of it is working age population which is typical for I...
by JayS
31 Oct 2019 16:06
Forum: Military Issues & History Forum
Topic: Kaveri & Aero-Engine: News & Discussion
Replies: 4998
Views: 961690

Re: Kaveri & Aero-Engine: News & Discussion

Brar has shared a slide about USAF's planned expenditure in International Mil Aviation thread. Just look at the numbers there. The Classified projects in will see $228 B invested in it, easily 2x of rest of the publicly known capex. Where is all that money going..? A large chunk of it is going in d...
by JayS
31 Oct 2019 15:47
Forum: Military Issues & History Forum
Topic: Tejas Mk.1 & Mk.1A: News & Discussions: 23 February 2019
Replies: 1459
Views: 416597

Re: Tejas Mk.1 & Mk.1A: News & Discussions: 23 February 2019

Not just did they re-write entire FCS from scratch, they implemented many changes taking that opportunity, making it even better. That's only one part of trouble. They had not enough actuators. They were rotating them in the iron bird and the TD at times. GE left suddenly leaving engine related work...
by JayS
31 Oct 2019 13:16
Forum: Military Issues & History Forum
Topic: Kaveri & Aero-Engine: News & Discussion
Replies: 4998
Views: 961690

Re: Kaveri & Aero-Engine: News & Discussion

Brar has shared a slide about USAF's planned expenditure in International Mil Aviation thread. Just look at the numbers there. The Classified projects in will see $228 B invested in it, easily 2x of rest of the publicly known capex. Where is all that money going..? A large chunk of it is going in de...
by JayS
31 Oct 2019 13:08
Forum: Military Issues & History Forum
Topic: Tejas Mk.1 & Mk.1A: News & Discussions: 23 February 2019
Replies: 1459
Views: 416597

Re: Tejas Mk.1 & Mk.1A: News & Discussions: 23 February 2019

Excellent article. Compliments to the writers. Most of the points are discussed here already, but let me point of two parts which stand apart for me. At least I have not seen anyone (or I might have seen but do not remember now) pointing out this very important point. It is only a few years after th...
by JayS
31 Oct 2019 00:15
Forum: Military Issues & History Forum
Topic: US military, technology, arms, tactics
Replies: 1535
Views: 223903

Re: US military, technology, arms, tactics

brar_w wrote:Image


Wow. Those numbers for Classified categories is easily 2x the publically known expenditures of next 10 categories. Thats 228B in classified projects in five years...!!
by JayS
30 Oct 2019 13:04
Forum: Military Issues & History Forum
Topic: Kaveri & Aero-Engine: News & Discussion
Replies: 4998
Views: 961690

Re: Kaveri & Aero-Engine: News & Discussion

That is a lie. Many of GTRE are Phd Engineers. But emphasis is on Research not on technology Oops. My bad. Anyway one more thing I wanted to point out is our constant and almost complete reliance on foreign engineering software. We think that manufacturing hardware is the only problem, but modern e...
by JayS
30 Oct 2019 12:36
Forum: Military Issues & History Forum
Topic: Advanced Medium Combat Aircraft: News & Discussion - 30 August 2019
Replies: 299
Views: 50006

Re: Advanced Medium Combat Aircraft: News & Discussion - 30 August 2019

sorry JayS, I still stand by the comments I made about the design parameters around AMCA and it's engine. Time is now to choose the right path (and I am not kidding myself that writing in BR forum would have much of an impact, but do see that many twitter handles have tweeted), I am all for AMCA, b...
by JayS
30 Oct 2019 00:57
Forum: Military Issues & History Forum
Topic: Advanced Medium Combat Aircraft: News & Discussion - 30 August 2019
Replies: 299
Views: 50006

Re: Advanced Medium Combat Aircraft: News & Discussion - 30 August 2019

Brar_W Please resist making every thread a US military technology thread. India is not going to fight USAF. So no need for the best of thee best and become denuded in that quest. Until ACM R.Bahaduria took over that mentality of seeking the best with out the alliance paraphernalia caused under equi...

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