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Search found 2866 matches

by JayS
23 Feb 2018 20:51
Forum: Military Issues Archive
Topic: 'Make in India' Single engined fighter
Replies: 5425
Views: 489924

Re: 'Make in India' Single engined fighter

America Has High Expectations for India. Can New Delhi Deliver? https://warontherocks.com/2018/02/america-has-high-expectations-for-india-can-new-delhi-deliver/ The title sounds like how your GHQ would emotionally blackmail you into taking her shopping and buy an expensive diamond ring for no damn ...
by JayS
23 Feb 2018 20:34
Forum: Military Issues & History Forum
Topic: AMCA News and Discussions
Replies: 3015
Views: 296367

Re: AMCA News and Discussions

Whilst we are discussing the engines for AMCA is there any news on the TVC in development for the AMCA engines... Didn't the DRDO have a tie-up with the Russians for developing the TVC tech and I believe it was in an advanced stage... whatever happened of it ...??? https://defenceupdate.in/indias-i...
by JayS
23 Feb 2018 11:43
Forum: Military Issues & History Forum
Topic: AMCA News and Discussions
Replies: 3015
Views: 296367

Re: AMCA News and Discussions

It would practically be a new engine entirely just the same dimensions. Not saying it can't be done, but such a comprehensive (and expensive) development is unlikely for reasons you and Brar stated. That pdf states the ENhanced engine being in the 116kN class. It does not mention the Dry thrust val...
by JayS
22 Feb 2018 18:57
Forum: Military Issues & History Forum
Topic: Indian Military Aviation - 21 Sept 2015
Replies: 3781
Views: 276767

Re: Indian Military Aviation - 21 Sept 2015

OK thanks - that image basically says that they want to achieve 2nd gradient where the plane can lift off with one engine inoperative and wheels retracted and reach 400 feet. Yes. For each of the requirement there would be a definition specifying all requirements on configuration in worst case. Thi...
by JayS
22 Feb 2018 18:17
Forum: Military Issues & History Forum
Topic: Kaveri & aero-engine discussion
Replies: 3868
Views: 605120

Re: Kaveri & aero-engine discussion

One observation, the sfc value in the above excel for Kaveri-prime is bit on higher side than the claimed figure of 0.78kg/kN-h. JayS and others ... pls note do NOT use the absolute numbers mentioned in the above model to compare with published parameters/ratings of a working/in-dev injin etc. This...
by JayS
22 Feb 2018 17:01
Forum: Military Issues & History Forum
Topic: Indian Military Aviation - 21 Sept 2015
Replies: 3781
Views: 276767

Re: Indian Military Aviation - 21 Sept 2015

IAF commits to buying 15 Saras Mk2 LTA Wat this means? Sounds like some post take-off high altitude mountaintop clearing requirement. But wat it means? See image below. You can easily find many such easily on google. https://goo.gl/images/XGQwb4 First obstacle clearance is 35ft. Second gradient tak...
by JayS
22 Feb 2018 15:05
Forum: Military Issues & History Forum
Topic: Indian Missiles News and Discussions - May 2017
Replies: 3095
Views: 504018

Re: Indian Missiles News and Discussions - May 2017

Whats the special requirement for a night trial? Also has the SFC ever testfired from anywhere except ITR? Is it assumed that in actual combat, it would be fired from ITR since there has never been any testing from any non DRDO location? That's precisely why we are making longer and longer range IC...
by JayS
22 Feb 2018 14:57
Forum: Military Issues & History Forum
Topic: Kaveri & aero-engine discussion
Replies: 3868
Views: 605120

Re: Kaveri & aero-engine discussion

So is this a possibilty for AMCA, what would be the weight of the improved Kaveri K9, can 2 improved Kaveri with combined dry thrust of 146Kn, power an empty weight AMCA weighing about 8 tonnes with 3.5 tonnes of fuel and 1.6 tonnes for 4 aam's and 2 bombs in internal bay still supercruise? There a...
by JayS
22 Feb 2018 11:28
Forum: Military Issues & History Forum
Topic: AMCA News and Discussions
Replies: 3015
Views: 296367

Re: AMCA News and Discussions

One thing to keep in mind is that the F414-EPE (110kN) version would be its ultimate development. I don't think there is any room for further growth in that engine. So if we need something better in a future MLU we'll have to look elsewhere. Technologically there is room for growth with latest tech...
by JayS
22 Feb 2018 11:18
Forum: Military Issues & History Forum
Topic: Kaveri & aero-engine discussion
Replies: 3868
Views: 605120

Re: Kaveri & aero-engine discussion

Ok, so here it is ... a simplistic (yes, I must admit almost embarrassingly simplistic) side-by-side comparison of this so-called Kaver-with-M88-core, original Kaveri and “paper-injin” called “Improved Kaveri”. (and no I can’t use Ganga, as it is copyrighted by Vinaji). https://imgur.com/xe3xRgJ.pn...
by JayS
22 Feb 2018 08:31
Forum: Military Issues & History Forum
Topic: Kaveri & aero-engine discussion
Replies: 3868
Views: 605120

Re: Kaveri & aero-engine discussion

You dont chnage core to match LP system. Its the other way round. M88 core will not take up anything more than what its designed for today, without quite a bit of rework, may be a decade long work. If it has to be fitted into Kaveri, then Kaveri's existing LP system has to be modified to match it. S...
by JayS
22 Feb 2018 08:21
Forum: Military Issues & History Forum
Topic: Tejas: News & Discussions: 09 February 2018
Replies: 163
Views: 26841

Re: Tejas: News & Discussions: 09 February 2018

Vivek K wrote:
Indranil wrote:It is not a must. But having atleast one pair of tail planes helps. Mk2 will have canards.

So the MK2 will come, with canards!


Sure thing.
by JayS
21 Feb 2018 19:55
Forum: Military Issues & History Forum
Topic: Kaveri & aero-engine discussion
Replies: 3868
Views: 605120

Re: Kaveri & aero-engine discussion

Ok, so here it is ... a simplistic (yes, I must admit almost embarrassingly simplistic) side-by-side comparison of this so-called Kaver-with-M88-core, original Kaveri and “paper-injin” called “Improved Kaveri”. (and no I can’t use Ganga, as it is copyrighted by Vinaji). https://imgur.com/xe3xRgJ.pn...
by JayS
21 Feb 2018 16:21
Forum: Military Issues & History Forum
Topic: Tejas: News & Discussions: 09 February 2018
Replies: 163
Views: 26841

Re: Tejas: News & Discussions: 09 February 2018

Viv S wrote:
Neela wrote:From someone who has a view of HAL Airport runway.
He swears Tejas can take off in 300m.

There are markers every 100 metres I think.

Every 500ft, not being too pedantic.
by JayS
21 Feb 2018 14:06
Forum: Military Issues & History Forum
Topic: Kaveri & aero-engine discussion
Replies: 3868
Views: 605120

Re: Kaveri & aero-engine discussion

Mango Question: Have we tested it for a long duration under dry thrust. If it is ok for dry thrust then we can use it for our UCAV? Thanks in advance. End Mango post. Only available info is that more than 3000hrs of ground testing is done. Its anyone's guess how much of it is at full thrust. But it...
by JayS
21 Feb 2018 12:25
Forum: Military Issues & History Forum
Topic: Tejas: News & Discussions: 09 February 2018
Replies: 163
Views: 26841

Re: Tejas: News & Discussions: 09 February 2018

Neela wrote:From someone who has a view of HAL Airport runway.
He swears Tejas can take off in 300m.
From this point12.949036, 77.656653 (google maps) with thick double bars as starting point , the Tejas takes off regularly just after the second smaller double bars.


For what config...??
by JayS
21 Feb 2018 12:02
Forum: Military Issues & History Forum
Topic: Kaveri & aero-engine discussion
Replies: 3868
Views: 605120

Re: Kaveri & aero-engine discussion

Avtar, I say there are two ways of looking at problems: strategic and tactical. Strategic is also called global and looks at many factors that could be used to tackle the problem. Tactical or military looks at the immediate root cause and tries to fix that. And the big lapse is to mistake one for t...
by JayS
21 Feb 2018 11:54
Forum: Military Issues & History Forum
Topic: Kaveri & aero-engine discussion
Replies: 3868
Views: 605120

Re: Kaveri & aero-engine discussion

Over the years, I have learned not to under-estimate India's national-security establishment. I wonder what is going on behind the scenes. What is curious about the Kaveri project is that certain projects have received the necessary funding for the enabling infrastructure to be built (IGMDP, Arihan...
by JayS
21 Feb 2018 11:47
Forum: Military Issues & History Forum
Topic: Kaveri & aero-engine discussion
Replies: 3868
Views: 605120

Re: Kaveri & aero-engine discussion

Are we going in circles here ? There is a new discussion. Maitya brings in the excel sheet and explains the problem using numbers. This time ion BPR. 3 pages later it boils down to - TET - OPR And Im reminded of that 1 Pinglish post from N^3. When we are trying to invent non-existent problems, we a...
by JayS
21 Feb 2018 11:29
Forum: Military Issues & History Forum
Topic: Kaveri & aero-engine discussion
Replies: 3868
Views: 605120

Re: Kaveri & aero-engine discussion

JayS, Maitya said it better than I can So even though BPR in itself doesn’t really change the Thrust rating etc, it’s an indicator of the maturity of the injin technology and of a better efficient turbofan injin. It does and it does not. This is gross simplification. If your system requirement for ...
by JayS
21 Feb 2018 11:08
Forum: Military Issues & History Forum
Topic: AMCA News and Discussions
Replies: 3015
Views: 296367

Re: AMCA News and Discussions

They are going the Tejas way. Feasibility/Project Definition phase >> TD >> FSED. First one is over, TD is to kick start, which has officially been sanctioned. FSED will in time come along. I thought they were bypassing TD (-> PV -> LSP -> SP) and going for "designed for production" appro...
by JayS
20 Feb 2018 18:11
Forum: Military Issues & History Forum
Topic: Kaveri & aero-engine discussion
Replies: 3868
Views: 605120

Re: Kaveri & aero-engine discussion

^^ Hmm. The m88 core will not entertain any more flow than what it is designed to handle today. Highly unlikely. So core flow cannot change from 50kg/s.
by JayS
20 Feb 2018 17:07
Forum: Military Issues & History Forum
Topic: Kaveri & aero-engine discussion
Replies: 3868
Views: 605120

Re: Kaveri & aero-engine discussion

Ramana saar, why are you so hung up on BPR, exactly..?? I really do not understand why there is a discussion on BPR going on here. There is no one ideal number for mil jet for BPR. It boils down from basic system level propulsion requirements. Isn't it obvious enough that Kaveri's low BPR was a resu...
by JayS
20 Feb 2018 16:56
Forum: Military Issues & History Forum
Topic: AMCA News and Discussions
Replies: 3015
Views: 296367

Re: AMCA News and Discussions

GOI has not even funded the FSED for this program that would be the first basic step for the program to look serious. Else we can continue with Tejas Mk2 and Mk3 type iterative program and order 400 of these types They are going the Tejas way. Feasibility/Project Definition phase >> TD >> FSED. Fir...
by JayS
20 Feb 2018 16:54
Forum: Military Issues & History Forum
Topic: AMCA News and Discussions
Replies: 3015
Views: 296367

Re: AMCA News and Discussions

srai wrote:^^^
Wasn’t the AMCA undergoing detailed design phase? This was to be 7-years long process, which is coming to an end. They have refined the final design.


Concept/Preliminary Design is over. Now TD will follow and then FSED.
by JayS
19 Feb 2018 21:24
Forum: Military Issues & History Forum
Topic: AMCA News and Discussions
Replies: 3015
Views: 296367

Re: AMCA News and Discussions

https://www.ada.gov.in/currentdocs/EOI%20for%20Manufacture%20of%20NGTD.pdf ADA/COM/IND/EOI/NGTD/2017-2018/SU Date: 16/02/2018 Aeronautical Development Agency is an autonomous Body setup under Ministry of Defence, Governmentof India for research and development of Indigenous Light Combat Aircraft (L...
by JayS
16 Feb 2018 19:28
Forum: Military Issues & History Forum
Topic: Indian Missiles News and Discussions - May 2017
Replies: 3095
Views: 504018

Re: Indian Missiles News and Discussions - May 2017

Ramjet design used by Akash it based on SA6 which is bit dated the burn time for Brahmos liquid fueled Ramjet is far greater. Another advantage of liquid fueled Ramjet is that it can be throttled. Whether the solid fueled Akash/SA6 can be throttled or not is matter of great debate. In theory, there...
by JayS
16 Feb 2018 16:50
Forum: Military Issues & History Forum
Topic: Indian Military Helicopters
Replies: 3271
Views: 348661

Re: Indian Military Helicopters

http://www.hal-india.com/Common/Uploads/TenderDoc/16140_TenderPDF1_EOI_ALH(Dhruv)-ToT.PDF Boost to Make-in-India, HAL Invites Indian Partner for Licence Manufacturing of ALH-Civil Under TOT Bengaluru, February 16, 2018: For the first time in Indian history, as a major boost to defence manufacturing...
by JayS
16 Feb 2018 11:59
Forum: Military Issues & History Forum
Topic: Indian Military Helicopters
Replies: 3271
Views: 348661

Re: Indian Military Helicopters

Shubham, Although, there is security in redundancy, modern aircraft engines are incredibly robust. Do the Chetaks & Cheetahs have a worse safety record than let's say the Dhruvs and Mi-17s? How about the Mirages over Mig-29s or Jaguars? Read online that CO of 114 HU stating that they have lost ...
by JayS
15 Feb 2018 17:50
Forum: Military Issues & History Forum
Topic: Kaveri & aero-engine discussion
Replies: 3868
Views: 605120

Re: Kaveri & aero-engine discussion

So why exactly we are discussing BPR here..? What is optimal value of BPR..? Why 0.16 is good or bad for Kaveri...? which one is tougher to achieve, low BPR or high BPR..? If all reported problems of Kaveri are with LPC and A/B, why are we replacing the core..? If Kabini was all that problematic, wh...
by JayS
15 Feb 2018 15:45
Forum: Military Issues & History Forum
Topic: Kaveri & aero-engine discussion
Replies: 3868
Views: 605120

Re: Kaveri & aero-engine discussion

SaiK, If profits ranked high in the american policy then we would have seen restricted hardwares being sold to india decades ago. So why the f16 now ? Why the GE turbofan now ? What changed in the last few years? And why hasn't the GoI accepted the f16 or the GE proposal(both have partnered with lo...
by JayS
15 Feb 2018 10:10
Forum: Military Issues & History Forum
Topic: Kaveri & aero-engine discussion
Replies: 3868
Views: 605120

Re: Kaveri & aero-engine discussion

IIRC - CFM = GE core + Safran LP system
by JayS
15 Feb 2018 01:10
Forum: Military Issues & History Forum
Topic: Indian Missiles News and Discussions - May 2017
Replies: 3095
Views: 504018

Re: Indian Missiles News and Discussions - May 2017

Tender for Rudra MII testing assembly mentions 200kg Warhead. Do we know what is Rudra - SSM? All we know it Rudra MII and MIII are sanctioned projects. And we know that it will be flown on Su-30MKI. At least to start with. I had posted about the tender regarding this previously. https://forums.bha...
by JayS
15 Feb 2018 00:06
Forum: Military Issues & History Forum
Topic: Indian Space Programme Discussion - Sept 2016
Replies: 2230
Views: 362773

Re: Indian Space Programme Discussion - Sept 2016

Will a "winged" booster (RLV) be able to slow down, turn 180 degrees, comeback all the way back and land horizontally with ZERO active propulsion (i.e gliding all the way)? AFAIK the Energia reusable boosters concept which were planned to do something similar needed a jet engine to be att...
by JayS
14 Feb 2018 23:56
Forum: Military Issues & History Forum
Topic: Indian Missiles News and Discussions - May 2017
Replies: 3095
Views: 504018

Re: Indian Missiles News and Discussions - May 2017

Haridas wrote:[Yaakwaala can confirm but I believe that section has the solid fuel for ram jet. I am told a marvellous design, where controlled amount of partially oxidixed fuel is burnt and fed into jet engine chamber.


That would make it a ducted rocket design wouldn't it..? Or what am I missing..?
by JayS
14 Feb 2018 23:18
Forum: Military Issues & History Forum
Topic: Indian Missiles News and Discussions - May 2017
Replies: 3095
Views: 504018

Re: Indian Missiles News and Discussions - May 2017

Tender for Rudra MII testing assembly mentions 200kg Warhead.
by JayS
13 Feb 2018 17:45
Forum: Military Issues & History Forum
Topic: Tejas: News & Discussions: 09 February 2018
Replies: 163
Views: 26841

Re: Tejas: News & Discussions: 09 February 2018

Indranil wrote:Damn it Kartik, now you make me question myself! I will find out.

But no trainer has been delivered after IOC-2, has it?


As per TSRaju, the SOP is not even frozen for the 4 Trainers on order.
by JayS
09 Feb 2018 20:42
Forum: Military Issues & History Forum
Topic: International Aerospace Discussion - Jan 2018
Replies: 190
Views: 12223

Re: International Aerospace Discussion - Jan 2018

x-posting fron Indian space thread: How much fuel is required to slow down a 40 ton object from terminal velocity to zero? I think you will get a lot of answers and other interesting info here (not sure how authentic it is but some numbers match those I have encountered elsewhere): https://www.reddi...
by JayS
09 Feb 2018 16:29
Forum: Trash Can Archive
Topic: LCA: News & Discussions: 15 August 2017
Replies: 3500
Views: 463163

Re: LCA: News & Discussions: 15 August 2017

^^ Jay, as per information shared by journalist M Anantha Krishna, who was ex Public Relationship Officer at HAL, the newest line of 8 is not the Hawk Line, but another greenfield project supposed to come up at Doddanekundi across Old Airport Road where the HAL New Management Academy is. The area i...
by JayS
09 Feb 2018 14:22
Forum: Military Issues & History Forum
Topic: International Aerospace Discussion - Jan 2018
Replies: 190
Views: 12223

Re: International Aerospace Discussion - Jan 2018

Has anyone come across anything published on Ariane 7...?

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