Search found 467 matches

by maitya
17 Jul 2015 14:45
Forum: Military Issues & History Forum
Topic: Expanding the role of AAC to include fixed-wing Aircraft
Replies: 85
Views: 5156

Re: Expanding the role of AAC to include fixed-wing Aircraft

x-posted from the LCA thread ... What I had in mind the events like 1962 war where IAF , reportedly, refused to move in I must admit that I am flabbergasted ! In 1962 I was a flight commander in a fighter squadron located in Ambala. I distinctly remember the run-up to the operations in 1962: Our sen...
by maitya
17 Jul 2015 14:43
Forum: Trash Can Archive
Topic: LCA Tejas: News and Discussions
Replies: 3980
Views: 175020

Re: LCA Tejas: News and Discussions

^^^^^^^^ Sir, not here - let's continue in this new thread. I've x-posted it there as well.
by maitya
17 Jul 2015 13:27
Forum: Trash Can Archive
Topic: LCA Tejas: News and Discussions
Replies: 3980
Views: 175020

Re: LCA Tejas: News and Discussions

^^^^^^^^ Chaanakyaji, let's continue in this new thread
by maitya
17 Jul 2015 13:22
Forum: Military Issues & History Forum
Topic: Expanding the role of AAC to include fixed-wing Aircraft
Replies: 85
Views: 5156

Re: Expanding the role of AAC to include fixed-wing Aircraft

And Chaanakyaji responded ... <Completely OT for the larger topic in hand> Ummm Chaanakyaji, I wouldn't agree with that. End of the day, however reprehensible IAF's attitude and actions towards indigenous products has been, it's still our force - so these institutional attitude issues needs to be so...
by maitya
17 Jul 2015 13:20
Forum: Military Issues & History Forum
Topic: Expanding the role of AAC to include fixed-wing Aircraft
Replies: 85
Views: 5156

Re: Expanding the role of AAC to include fixed-wing Aircraft

To which I had posted ... Is it possible to use LCA in CAS role for Ground forces? In that case , Army can have its own Aviation Wing providing CAS through LCA independently of Airforce which could be freed to undertake Deep Strike Missions, CAP and controlling the Sky or Airspace dominance role. Th...
by maitya
17 Jul 2015 13:17
Forum: Military Issues & History Forum
Topic: Expanding the role of AAC to include fixed-wing Aircraft
Replies: 85
Views: 5156

Re: Expanding the role of AAC to include fixed-wing Aircraft

To which shivji added ... Is it possible to use LCA in CAS role for Ground forces? In that case , Army can have its own Aviation Wing providing CAS through LCA independently of Airforce which could be freed to undertake Deep Strike Missions, CAP and controlling the Sky or Airspace dominance role. 19...
by maitya
17 Jul 2015 13:16
Forum: Military Issues & History Forum
Topic: Expanding the role of AAC to include fixed-wing Aircraft
Replies: 85
Views: 5156

Re: Expanding the role of AAC to include fixed-wing Aircraft

To set the ball rolling, this topic got introduced in the LCA thread by chaanakyaji with the following series of posts ... X-posting Is it possible to use LCA in CAS role for Ground forces? In that case , Army can have its own Aviation Wing providing CAS through LCA independently of Airforce which c...
by maitya
17 Jul 2015 13:14
Forum: Military Issues & History Forum
Topic: Expanding the role of AAC to include fixed-wing Aircraft
Replies: 85
Views: 5156

Expanding the role of AAC to include fixed-wing Aircraft

This topic has been off-and-on in the news with some amount of discussion as well, but has never got detailed attention it deserved. Army Aviation Corps or AAC , an IA unit, was setup in mid-80s, primarily to take over the Supply, SAR, MEDEVAC roles for the Siachan outposts from IAF, has it's role e...
by maitya
16 Jul 2015 16:03
Forum: Trash Can Archive
Topic: LCA Tejas: News and Discussions
Replies: 3980
Views: 175020

Re: LCA Tejas: News and Discussions

Is it possible to use LCA in CAS role for Ground forces? In that case , Army can have its own Aviation Wing providing CAS through LCA independently of Airforce which could be freed to undertake Deep Strike Missions, CAP and controlling the Sky or Airspace dominance role. The LCA Tejas is fighting a...
by maitya
15 Jul 2015 12:42
Forum: Trash Can Archive
Topic: LCA Tejas: News and Discussions
Replies: 3980
Views: 175020

Re: LCA Tejas: News and Discussions

Boy, this thread sure does move at a furious pace - difficult to keep pace with it. Anyway here goes ... It's this intellectual dishonesty of constantly criticizing of something, in this case weight-creep, a key contributor of which is the scope-creep that they themselves have asked for in the first...
by maitya
12 Jul 2015 15:34
Forum: Trash Can Archive
Topic: LCA Tejas: News and Discussions
Replies: 3980
Views: 175020

Re: LCA Tejas: News and Discussions

^^^^ An order for 200 LCA Mk II should indeed be placed and manufacturing facilities designed and developed accordingly. eklavyaji, though it's completely IAFs prerogative to define their operational need (both current and forecasted), plan the force-compostion and likewise place an order etc, may ...
by maitya
12 Jul 2015 10:53
Forum: Trash Can Archive
Topic: LCA Tejas: News and Discussions
Replies: 3980
Views: 175020

Re: LCA Tejas: News and Discussions

... What more can IAF do? Are you serious ... Let's see ... how about specifying realistic performance parameters in the ASR? Performance parameters derived from experience of flying the platforms for decades that LCA was supposed to replace? But no, what we have is a copy-paste of different brochu...
by maitya
10 Jul 2015 15:55
Forum: Mil-Tech Archive
Topic: AMCA News and Discussions
Replies: 3315
Views: 463819

Re: AMCA News and Discussions

EBM 3-D mfg is like laser sintering? AFAIK, they are similar as with Laser Sintering (or more precisely Direct Metal Laser Sintering, DMLS) a CO2 Laser would be instead of an Electron beam gun in EBM. Both achieve high energy levels in a very narrow beam-width etc. However in Laser Sintering the co...
by maitya
09 Jul 2015 11:31
Forum: Mil-Tech Archive
Topic: AMCA News and Discussions
Replies: 3315
Views: 463819

Re: AMCA News and Discussions

NRao we both are voting for a new Indian developed engine.. Maitya is going to vell how it can be developed based on Steps 3a and 3b. Let me bring out a technological challenge to illustrate the issue with advanced manufacturing technology availability in India vis-à-vis it’s impact to any next gen...
by maitya
08 Jul 2015 10:47
Forum: Mil-Tech Archive
Topic: AMCA News and Discussions
Replies: 3315
Views: 463819

Re: AMCA News and Discussions

Before I retire for today, a rhetorical question - if by dginn magic or whatever Kaveri attains 84KN wet thrust levels today, will it be advisable to insist on Mk1's be produced with it? How long will it take to fully qualify the engine on the TDs, and do we have the luxury of waiting that long? If...
by maitya
08 Jul 2015 10:35
Forum: Mil-Tech Archive
Topic: AMCA News and Discussions
Replies: 3315
Views: 463819

Re: AMCA News and Discussions

No. Because 84KN wet thrust won't cut the mustard for the Tejas. I agree they need a local solution and have ~ ten years to get there. Ramanaji, yes and no … yes because if 84KN of F404 is Mk1 why not it is applicable for Kaveri? No, because even if it’s achieved today, CEMILAC (or for that matter ...
by maitya
08 Jul 2015 00:18
Forum: Mil-Tech Archive
Topic: AMCA News and Discussions
Replies: 3315
Views: 463819

Re: AMCA News and Discussions

ShauryaT, Nraoji, ramanaji pls note as much as I or you want everything to be developed indigenously, the current technology gap is just too large to bridge in next decade or so - by the time AMCA would need a definitive power-plant solution implemented and deep into flight-testing. I'll try and exp...
by maitya
07 Jul 2015 18:23
Forum: Mil-Tech Archive
Topic: AMCA News and Discussions
Replies: 3315
Views: 463819

Re: AMCA News and Discussions

maitya ji, I think your posts are more appropriate in the "Kaveri" thread. It is my understanding that the AMCA will be powered by an imported engine. They are expected to issue a global tender and make a selection by the end of this year. NRaoji, threads etc doesn't matter ... will link ...
by maitya
07 Jul 2015 16:20
Forum: Trash Can Archive
Topic: Is the AMCA a pipe dream that will become a dead Albatross?
Replies: 303
Views: 13301

Re: Is the AMCA a pipe dream that will become a dead Albatro

I see folks here are all quoting (from brochures) max wet thrust figures when "supercruise" itself is a mandatory requirement - pls note both are completely contradictory. Supercruise capability is best exploited if we have a high Dry-Thrust value but, at the same time, with a reasonably l...
by maitya
07 Jul 2015 09:07
Forum: Mil-Tech Archive
Topic: AMCA News and Discussions
Replies: 3315
Views: 463819

Re: AMCA News and Discussions

[Part-4: Probable Solution] But how to go about all these … Only a fully-entrenched team from GE or other some other vendor, working in a full co-operative mode with GTRE folks (who understand the Kabini core – it’s almost impossible for experts et all to just take a turbofan and “understand” it) c...
by maitya
07 Jul 2015 09:02
Forum: Mil-Tech Archive
Topic: AMCA News and Discussions
Replies: 3315
Views: 463819

Re: AMCA News and Discussions

[Part-3: Problem Summary] Coming back to the topic, summary of all of the above is, such stunts like newer fan etc would mean Kaveri –II, K10, Ganga, whatever you decide to call it, would crank out higher thrust (upto a certain level), but at the cost of the efficiency (aka SFC takes a hit). And th...
by maitya
07 Jul 2015 08:59
Forum: Mil-Tech Archive
Topic: AMCA News and Discussions
Replies: 3315
Views: 463819

Re: AMCA News and Discussions

[Part -2: Analysis of Increasing Thrust via Mass-Flow] Now before we proceed further, pls refer to the 6th and 7th columns of the “improved” desktop-turbofan-perf-chart below. http://i1355.photobucket.com/albums/q702/maitya/For%20BR%20-%20Engine/Gas%20Turbine%20Calc_Jun15_zps9pnj0ioi.png This busin...
by maitya
07 Jul 2015 08:57
Forum: Mil-Tech Archive
Topic: AMCA News and Discussions
Replies: 3315
Views: 463819

Re: AMCA News and Discussions

^^^ NRao ji, Thank you. Good digging for nuggets. I was specially intrigued by the K9, K10 engine terms as a future development of Kaveri Engine. Quoting an excerpt and calling attention of Maitya ji, Vina ji, Karan M, Ramana Sir and other gurus to look at this link: Propulsion AMCA will be a twin-...
by maitya
07 Jul 2015 07:52
Forum: Mil-Tech Archive
Topic: AMCA News and Discussions
Replies: 3315
Views: 463819

Re: AMCA News and Discussions

^^^ NRao ji, Thank you. Good digging for nuggets. I was specially intrigued by the K9, K10 engine terms as a future development of Kaveri Engine. Quoting an excerpt and calling attention of Maitya ji, Vina ji, Karan M, Ramana Sir and other gurus to look at this link: <snip> and this just on propuls...
by maitya
06 Jul 2015 09:33
Forum: Military Issues & History Forum
Topic: Poor IAF role in R&D, manufacture - HAL/IAF tiffs to blame?
Replies: 228
Views: 8717

Re: Poor IAF role in R&D, manufacture - HAL/IAF tiffs to bla

<snip> Did using lighter composites live up to the promise of being lighter than metal built planes? An emphatic no. http://www.tejas.gov.in/specifications/leading_particulars_and_performance.html The higher percentage of composites using Tejas weights 6560 kg which is in the same range as Gripen C...
by maitya
05 Jul 2015 20:27
Forum: Military Issues & History Forum
Topic: Poor IAF role in R&D, manufacture - HAL/IAF tiffs to blame?
Replies: 228
Views: 8717

Re: Poor IAF role in R&D, manufacture - HAL/IAF tiffs to bla

Vinaji, "optimisation" against what "constraints"? Optimisation, as opposed to maximisation (or minimisation), is always predicated against a set of constraints - what are they? Are we trying to say "optimize" the wing-structure-strength against twin constraints of &quo...
by maitya
05 Jul 2015 18:16
Forum: Military Issues & History Forum
Topic: Poor IAF role in R&D, manufacture - HAL/IAF tiffs to blame?
Replies: 228
Views: 8717

Re: Poor IAF role in R&D, manufacture - HAL/IAF tiffs to bla

Waiting period got over a couple of hour back, so I guess it ok to respond now ... And all this is basis assertion by one BRF member (@maitya) who has gone to the extent of claiming that IAF deliberately drafted performance expectations which can never be met and were meant to kill the LCA program ....
by maitya
30 Jun 2015 10:23
Forum: Military Issues & History Forum
Topic: Radar - Specs & Discussions
Replies: 924
Views: 214068

Re: Radar - Specs & Discussions

Srin, thanks a ton for this news. This is great stuff. We have made huge strides in overall design & development of AESA radars, and the individual systems that go into them, plus the critical software. GaN is the next step required to keep those designs current in the years to come. Basically,...
by maitya
28 Jun 2015 01:18
Forum: Military Issues & History Forum
Topic: Poor IAF role in R&D, manufacture - HAL/IAF tiffs to blame?
Replies: 228
Views: 8717

Re: Poor IAF role in R&D, manufacture - HAL/IAF tiffs to bla

I guess you have not read the LCA aerodynamics discussion especially the contradiction between ITR and STR and the wing shapes coupled with underpowered engine? But I did. Where the line of argument is that if the LCA does not meet STR and ITR parameters, it must be because IAF indulged in 'best of...
by maitya
25 Jun 2015 15:53
Forum: Military Issues & History Forum
Topic: Poor IAF role in R&D, manufacture - HAL/IAF tiffs to blame?
Replies: 228
Views: 8717

Re: Poor IAF role in R&D, manufacture - HAL/IAF tiffs to bla

This is not about the IAF but it seems symptomatic of what we hear has been happening http://idrw.org/indian-army-chasing-pipe-dreams-forever/#more-67262 The Army’s request is for an FRCV that will not only serve as a ‘medium’-sized main battle tank to replace the Army’s ageing fleet of licence-bui...
by maitya
25 Jun 2015 14:53
Forum: Military Issues & History Forum
Topic: INS Vikrant News and Discussion
Replies: 1813
Views: 170026

Re: INS Vikrant News and Discussion

It is a semi ballistic lift off aided by aerodynamic lift for transition to free flight. The angle of attack business comes in for this reason. Though the plane as it leaves the ramp is like a rock flung upwards, the pitch angle at which it exits has to be maintained at the designed level for the c...
by maitya
18 Jun 2015 09:01
Forum: Military Issues & History Forum
Topic: Kaveri & Aero-Engine: News & Discussion
Replies: 5010
Views: 974963

Re: Kaveri & aero-engine discussion

Uprating decrease engine life and was beaten to death in Pingrezi thread. Ummm ... True, but some tweaking is still possible without sacrificing too much on engine life etc. In the context of the Kaveri, refer to Step 2, in one of my earlier posts here ... where it talks about achieving the 6th col...
by maitya
04 Jun 2015 10:20
Forum: Trash Can Archive
Topic: LCA Tejas: News and Discussions
Replies: 3980
Views: 175020

Re: LCA Tejas: News and Discussions

^^^ wrt Pt. 3 above [OT for this thread] If it's perfectly fine to clamor for “reservation” of senior mgmt. positions for retired IAF AM-level aphsaars in HAL and other PSUs, shouldn’t it be perfectly fine, on a reciprocal basis, reserve some positions (say 50%) in the IAF promotion boards (used to ...
by maitya
04 Jun 2015 09:46
Forum: Trash Can Archive
Topic: LCA Tejas: News and Discussions
Replies: 3980
Views: 175020

Re: LCA Tejas: News and Discussions

If they continue on current path of neti, neti or nyet, nyet to LCA, they will be come a very good NATO transportation force with all those C-17s etc.... rescue flights will be only special ops. So better decide what they want to be? Yes, the "I" in it's acronym is increasingly looking to...
by maitya
02 Jun 2015 13:14
Forum: Military History Archive
Topic: Brig. RayC RIP
Replies: 90
Views: 12568

Re: Brig. RayC RIP

RIP RayC Sir!! You were missed in the forum and now you will be missed forever - Again, RIP Sir!!
by maitya
27 May 2015 09:58
Forum: Trash Can Archive
Topic: LCA Tejas: News and Discussions
Replies: 3980
Views: 175020

Re: LCA Tejas: News and Discussions

Uttam will take its time and fits the Mk-II timeline of 2022 etc ... in the interim (between 2017 to 2022) if MK-I are provided with 2052s, it's a good move. Maybe something like Mk-I IoC 20 platform with MMR till 2017, next 20 Mk-I FoC platforms with 2052s till 2019, then upgrade/repalce the origin...
by maitya
26 May 2015 09:38
Forum: Trash Can Archive
Topic: LCA Tejas: News and Discussions
Replies: 3980
Views: 175020

Re: LCA Tejas: News and Discussions

The fundamental rule to remember, from pure layman pov of course, when it comes to understanding various types of turn-rates is, 1) ITR is an aero-design based performance factor (limited by Aerodynamic Load Factor - which in itself is dependent upon the by Max Lift Coeff of the wing-planform design...
by maitya
25 May 2015 15:39
Forum: Trash Can Archive
Topic: LCA Tejas: News and Discussions
Replies: 3980
Views: 175020

Re: LCA Tejas: News and Discussions

Do you realise something - other than the assessment done on the Beta Coefficient, (which puts STR at 16 deg/sec I think) - we still do not have a clear idea what the ITR/ STR is for the Tejas. What the naysayers have done is use the lack of data to fill in the gaps with anything they want. Sanjay,...
by maitya
25 May 2015 14:30
Forum: Trash Can Archive
Topic: LCA Tejas: News and Discussions
Replies: 3980
Views: 175020

Re: LCA Tejas: News and Discussions

Q: From the comments by some members eg. the ASR issue, is the IAF in their opinion guilty of "goalpost shifting" of the LCA as alleged of the IA in the Arjun programme? Or are they justified in limiting the number of MK-1s ordered? The bigger problem than shifting of goalposts etc, is th...
by maitya
25 May 2015 08:39
Forum: Trash Can Archive
Topic: LCA Tejas: News and Discussions
Replies: 3980
Views: 175020

Re: LCA Tejas: News and Discussions

Absolutely rak bhai! Mk1 (call it ASR v0.1) must be inducted and IAF should provide more operational feedback to make it to Mk2 (ASR v.2) more robust in terms of capability enhancements. I am sure, operational feedback would add additional inputs in not just platform feedback, but ops feedback - ma...

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