Search found 49 matches

by member_25400
31 Oct 2015 14:12
Forum: Military Issues & History Forum
Topic: Indian Nuclear Submarines -3
Replies: 1503
Views: 247609

Re: INS Arihant (ATV) News and Discussion -3

We don't have gas turbine tech. Hal can make ge lm2500 aero derivative gas turbines under license. Also kaveri marine derivative may be integrated to the rajput class.. Also, I believe that the power plant in kalpakkam is identical to the one on the arihant. BTW. Now that nirbhay test failed, I ass...
by member_25400
13 Oct 2015 15:01
Forum: Trash Can Archive
Topic: Indian Space Programme Discussion
Replies: 3934
Views: 299047

Re: Indian Space Programme Discussion

..... the recent film The Martian .... being a vehicle for PRC's soft power projection. In the movie china is seen as the heroic savior of the mission whilst NASA is portrayed as being cynical and unimaginative. Alas SDREs are nowhere to be seen. ... China is a huge market for movies. So studios do...
by member_25400
13 Oct 2015 09:47
Forum: Trash Can Archive
Topic: LCA Tejas: News and Discussions
Replies: 3980
Views: 210300

Re: LCA Tejas: News and Discussions

All this talk about "India should not have taken such a big bite in the 1980s and trying to build a multirole fighter, it was too ambitious" I think is bollocks. What was India suppose to do? The project was overambitious in trying to come up with engine, avionics (eg mmr) and cutting edg...
by member_25400
03 Oct 2015 12:40
Forum: Trash Can Archive
Topic: IAF Rafale News and Discussions - 26 May 2015
Replies: 3973
Views: 293527

Re: IAF Rafale News and Discussions - 26 May 2015

. Afterall what is the basis of prices told under FMS. It is merely a captive purchase based on prices as told by USA not a competitive prices. . Chaanakya, US FMS process and details are available on the web. For example: http://lmdefense.com/foreign-military-sales/fms-vs-dcs/ FMS is govt to govt ...
by member_25400
03 Oct 2015 03:25
Forum: Technology & Economic Forum
Topic: Mass Rapid Transit in India
Replies: 1486
Views: 162685

Re: Mass Rapid Transit in India

Actually I am looking to collate this data on cost of metro systems. . If you find interesting links please post here. Vriksh, there was a while that I was looking at some costs, but I didn't save the reports. Some of the reports are open source by the relevant agency /public bodies and some are re...
by member_25400
09 Aug 2015 05:21
Forum: Military Issues & History Forum
Topic: Project BRF: Radome technology in India
Replies: 46
Views: 7809

Re: Project BRF: Radome technology in India

More power means more (waste) heat, which needs cooling. Which needs space and weight. Or it may impact reliability. Some airplanes can also be power limited.
by member_25400
28 Apr 2015 13:56
Forum: Military Issues & History Forum
Topic: Project 75I - It Begins
Replies: 1028
Views: 196338

Re: Project 75I- It Begins

And I am telling you that no other navy would do what the IN would do - create 5 different lines of subs at the same time. It is not strategically feasible because you need to account for the infrastructure and the supporting industry that comes with it Hitesh, US had large number of single type of...
by member_25400
18 Mar 2015 12:48
Forum:
Topic: BR Mainsite 2.0 : Volunteers Wanted
Replies: 133
Views: 0

Re: BR Mainsite 2.0 : Volunteers Wanted

Non-technical and perhaps not too qualified or dependable to be a contributor, but willing to work on review etc on weekend.
Not sure about my original email ; will have to check if this can be resuscitated.
by member_25400
11 Mar 2015 17:57
Forum: Trash Can Archive
Topic: LCA Tejas: News and Discussions
Replies: 3980
Views: 210300

Re: LCA Tejas: News and Discussions

a simple LCA bomb truck. The LCA suffers a bit from trying to be multirole, a good fighter and a good bomb truck. Trying to cram all these capabilities in a small, light frame has resulted in the compromises that the LCA must live with today. it might be a neither-here-nor-there fighter....we could...
by member_25400
23 Feb 2015 11:56
Forum: Trash Can Archive
Topic: Indian Naval News & Discussion - 12 Oct 2013
Replies: 4029
Views: 217714

Re: Indian Naval Discussion

"But its power to take off just in case the arrester wires are missed is suspect. Therefore, the carrier doesn’t operate too far away from the shores,” I think the writer got something garbled. There are 3 arrestor wires. If you miss all of them, you try for emergency throttle and convert it i...
by member_25400
13 Dec 2014 19:47
Forum: Trash Can Archive
Topic: Indian Military Aviation- September 29 2013
Replies: 3967
Views: 200467

Re: Indian Military Aviation- September 29 2013

For any defense aircraft Industry to develop/flourish it needs 2. Competition case in point Boeing (Mcdoneld douglas) competes with Lockheed Martin which competes with Fairchild (Elbit systems now), General Dynamics, Northrup Grumman, Piper Aircraft and hunderds others!! Just in USA How many fighte...
by member_25400
14 Jul 2014 10:03
Forum: Mil-Tech Archive
Topic: Artillery: News & Discussion
Replies: 4827
Views: 811395

Re: Artillery Discussion Thread

Govt confirms deal for ultra-light howitzer artillery guns with the US has hit a dead-end "The case has not progressed due to cost issues and because the vendor has not been able to come up with a proposal fully-compliant to the offset requirements," said defence minister Arun Jaitley, in...
by member_25400
01 Jun 2014 21:13
Forum: Trash Can Archive
Topic: LCA News and Discussions, 22-Oct-2013
Replies: 3964
Views: 207578

Re: LCA News and Discussions, 22-Oct-2013

. Guns are not going away anytime soon. Shiv, I don't disagree with you. But you underestimate the impact of missiles for WVR work. In the merge, guns AND missiles are effective; and high off boresight missiles are now becoming common. Combined with multiple kinds of sensors, it makes them more let...
by member_25400
01 Jun 2014 20:04
Forum: Trash Can Archive
Topic: LCA News and Discussions, 22-Oct-2013
Replies: 3964
Views: 207578

Re: LCA News and Discussions, 22-Oct-2013

vsunder : "one should go ahead and grant FOC to the LCA without cannons, BVR and retro-fit. This is an intrinsically bad idea, even historically." Not intrinsically historically. After all, the F-16 and many other planes started life without BVR missiles and had them retro-fitted later. T...
by member_25400
03 Apr 2014 13:59
Forum: Trash Can Archive
Topic: Indian Space Programme Discussion
Replies: 3934
Views: 299047

Re: Indian Space Programme Discussion

Re: Insat : NRao/Cybaru : If it had that amount of delta vee onboard, it's life would not be over. The amount of delta vee required to send a satellite wandering off into space (presumably interstellar) or into the sun is quite substantial (and may not be available even when new). It will be cheaper...
by member_25400
03 Apr 2014 13:58
Forum: Trash Can Archive
Topic: Indian Space Programme Discussion
Replies: 3934
Views: 299047

Re: Indian Space Programme Discussion

Deleted duplicate post
by member_25400
17 Mar 2014 05:53
Forum: Strategic & Security Issues Archive
Topic: Intelligence and National Security Discussion
Replies: 979
Views: 122670

Re: Intelligence and National Security Discussion

Rear Admiral Sudhir Pillai, chief of staff of India's Andamans and Nicobar Command, told Reuters. "It's possible that the military radars were switched off as we operate on an 'as required' basis." (to save costs) Also that there were only 3 radar stations, each with a coverage of ~150 km....
by member_25400
04 Mar 2014 12:41
Forum: Mil-Tech Archive
Topic: AMCA News and Discussions
Replies: 3315
Views: 502637

Re: AMCA News and Discussions

engines were supposed to be stealthy ones. for e.g. ( f 119, yf 120) There is no such concept as a stealthy engine. Radar reflection can be reduced by position of engine wrt inlet (S-shape doesn't allow for direct view of engine), or by installing radar blockers. This is therefore more a function o...
by member_25400
04 Mar 2014 12:02
Forum: Military Issues & History Forum
Topic: Navy Chief Resigns over Sindhuratna fire
Replies: 322
Views: 14494

Re: Navy Chief Resigns over Sindhuratna fire

The inquiry has stated categorically that it was a cable fire and not malfunctioning batteries that was the cause. http://timesofindia.indiatimes.com/india/Cable-fire-led-to-INS-Sindhuratna-mishap/articleshow/31359386.cms Also that the batteries had been taken from INS Sindhukesari (also undergoing ...
by member_25400
04 Mar 2014 09:55
Forum: Military Issues & History Forum
Topic: Navy Chief Resigns over Sindhuratna fire
Replies: 322
Views: 14494

Re: Navy Chief Resigns over Sindhuratna fire

So is it the case that Sub Batteries do produce Hydrogen and they need to be burned out ? Exactly how does the burn out process takes place ? Sounds like a dangerous thing. Cant believe when he says Battery pit fires are order of the day ? Is that a normal thing and why do they sail out with such s...
by member_25400
03 Feb 2014 13:44
Forum: Trash Can Archive
Topic: Indian Naval News & Discussion - 12 Oct 2013
Replies: 4029
Views: 217714

Re: Indian Naval Discussion

Very nice pictures of Indian land based mock aircraft carrier (Field Carrier Landing Practice) deleted. so the only unreal ... It's only the first step ... wind speeds, navigation, layout , etc will all differ. Finding and landing on a target that has traveled some distance from where you started, ...
by member_25400
31 Jan 2014 12:24
Forum: Trash Can Archive
Topic: Indian Naval News & Discussion - 12 Oct 2013
Replies: 4029
Views: 217714

Re: Indian Naval Discussion

[re p-8A bloomberg report] So non performing foreign gear doesn't equal to India having to pay for it !!!! Wow ground breaking insights here. "DOTE report: The P-8A Increment1 system is operationally suitable." http://www.reddit.com/r/CredibleDefense/comments/1wiins/pdf_dote_report_on_p8a...
by member_25400
27 Jan 2014 14:11
Forum: Trash Can Archive
Topic: Indian Naval News & Discussion - 12 Oct 2013
Replies: 4029
Views: 217714

Re: Indian Naval Discussion

"Flaws in the $35 billion program included the plane’s radar performance, sensor integration and data transfer, Michael Gilmore, chief of the Pentagon testing office, wrote in his annual report on major weapons, *which has yet to be released*" Much smoke, unclear if any fire. The issues s...
by member_25400
19 Jan 2014 11:03
Forum: Trash Can Archive
Topic: Indian Space Programme Discussion
Replies: 3934
Views: 299047

Re: Indian Space Programme Discussion

Does having longer burn times mean it provide better more efficient thrust?. No, Specific Impulse (Isp) is a measure of efficiency (fuel/mass efficiency) of an engine. Longer burn time means that the engine systems do need to be reliable to that extent. Of course, running an engine longer means tha...
by member_25400
19 Jan 2014 10:43
Forum: Trash Can Archive
Topic: Indian Space Programme Discussion
Replies: 3934
Views: 299047

Re: Indian Space Programme Discussion

why was clustering of Vikas engine not considered as a serious option Clustering of engines is not simple, either. Control issues, and (depending on configuration), complex and heavy plumbing are common. This can also result in reliability issues. The Soviet Union moon rocket tried to make up for l...
by member_25400
13 Jan 2014 06:12
Forum: Military Issues & History Forum
Topic: INS Vikramaditya: News and Discussion
Replies: 1524
Views: 121575

Re: INS Vikramaditya: News and Discussion

Again CBG is a US concept not relevant to Indian environment or operations. ...... So Indian/British/Russian/French/Italian/Spanish Navies cannot have CBG type concepts. Er.. what? A CBG is simply a carrier and it's escorts where the task force is in a single formation. All kinds of countries have ...
by member_25400
10 Jan 2014 18:48
Forum: Trash Can Archive
Topic: LCA News and Discussions, 22-Oct-2013
Replies: 3964
Views: 207578

Re: LCA News and Discussions, 22-Oct-2013

GE414 was chosen because being L1. IIRC ADA had done study on both ... and was ready for anyone winning the bid. I was sincerely hoping that America won't get it . Agree that choice was on L1. initially, I thought Ej200 (being an advanced & lighter engine (+cooler/low MTBO), may get us better T...
by member_25400
10 Jan 2014 18:12
Forum: Trash Can Archive
Topic: GSLV-D5 Launch status and post launch discussions
Replies: 471
Views: 26195

Re: GSLV-D5 Launch status and post launch discussions

I have not heard of any progress on the rl-60. Sorry. . This was the last news I had of the RL-60. (http://www.flightglobal.com/news/articles/nasa-us-air-force-to-study-joint-rocket-engine-370660/) Since your reply, I found this recent proposal to enhance sls by using the MB-60 (derivative of RL-60...
by member_25400
10 Jan 2014 05:09
Forum: Trash Can Archive
Topic: GSLV-D5 Launch status and post launch discussions
Replies: 471
Views: 26195

Re: GSLV-D5 Launch status and post launch discussions

Btw, the significance of a reliable design in upper-stages is understood only when one realizes that khan keeps stroking his Centaur stage since the 50s and calls it "my precious" for a reason Goddamn thing has been polished to a highly reliable state since that grand master of fun design...
by member_25400
05 Jan 2014 18:51
Forum: Trash Can Archive
Topic: GSLV-D5 Launch status and post launch discussions
Replies: 471
Views: 26195

Re: GSLV-D5 Launch status and post launch discussions

^^^^^^^^^^^^^^^^ So if staged combustion is better than gas-generator cycle engine then why move to an inefficient tech for CE - 20 when we have mastered staged combustion in CE 7.5 ? Efficiency matters. But Thrust matters (CE 20 vs CE 7.5 ) and reliability and ease of development also matter hugel...
by member_25400
05 Jan 2014 18:29
Forum: Trash Can Archive
Topic: Indian Space Programme Discussion
Replies: 3934
Views: 299047

Re: Indian Space Programme Discussion

From the GSLV-D5 document on ISRO site ok, noobie question, so please don't laugh :) The first stage which is solid provides altitude gain of almost 70kms, and that is while trying to escape the earth's gravity. However, the CUS provides altitude gain of around 73kms in outer space where the earth'...
by member_25400
04 Jan 2014 16:48
Forum: Military Issues & History Forum
Topic: INS Vikramaditya: News and Discussion
Replies: 1524
Views: 121575

Re: INS Vikramaditya: News and Discussion

Saik on C130 for CoD and other roles. [C130 ]Its way too big an a/c even for the nimitz class except for emergency .. even C27 would be too large. the E2/C2 is about the realistic limit. USS forrestal is a supercarrier, just like nimitz. Vikaramaditya & Vikrant (and viraat heh!) are *much* small...
by member_25400
04 Jan 2014 16:23
Forum: Military Issues & History Forum
Topic: INS Vikramaditya: News and Discussion
Replies: 1524
Views: 121575

Re: INS Vikramaditya: News and Discussion

* The naval doctrine... is clearly based on political thinking - as it should be. However, given the sorry state of Indian political affairs, THAT seems to have reflected on the doctrine itself. That needs to be corrected, else it will place a huge pressure on the Services in general and on the IN ...
by member_25400
29 Dec 2013 14:34
Forum: Trash Can Archive
Topic: LCH and other Helicopters Discussion Thread
Replies: 3908
Views: 766655

Re: LCH and other Helicopters Discussion Thread

Has anyone posted this video on IN's Ka-31 AEW choppers ?
http://www.youtube.com/watch?v=i-cxkeBl-RE
Found it interesting.

BTW, The same series includes information on IN sea harrier and Mig 29K
by member_25400
29 Dec 2013 14:20
Forum: Trash Can Archive
Topic: Armoured Vehicles Discussion Thread - Jan 12, 2012
Replies: 4311
Views: 211861

Re: Armoured Vehicles Discussion Thread - Jan 12, 2012

, the lower end can be met by a turbine and all surges by a 1000hp diesel, Ultimately use of turbines may cause precision engineering to trickle down the auto industry. Not much call for turbine engines in auto industry. Trend is towards hybrid engines. In naval parlance, there are CODOG* (combined...
by member_25400
29 Dec 2013 13:28
Forum: Military Issues & History Forum
Topic: INS Vikramaditya: News and Discussion
Replies: 1524
Views: 121575

Re: INS Vikramaditya: News and Discussion

1. N Rao: Very much obliged to you for the 2010 doctrine link and the position paper on expeditionary outlook. 1a. IMHO, these should be archived/stickied somewhere . Can a MOD help ? 1b. As you said, these strategies are tame, but even more so, they are generic/anodyne. To me they look more like pr...
by member_25400
29 Dec 2013 09:47
Forum: Trash Can Archive
Topic: Indian Space Programme Discussion
Replies: 3934
Views: 299047

Re: Indian Space Programme Discussion

that cryogenic engine delay is to blame for us lagging behind the chinese now. Chinese have much longer history of rocket engine development, (military and civilian,) have more infrastructure/more money in rocket/space program development, with coherent long range programme and have had russian hel...
by member_25400
29 Dec 2013 09:43
Forum: Trash Can Archive
Topic: Indian Space Programme Discussion
Replies: 3934
Views: 299047

Re: Indian Space Programme Discussion

Can someone tell me why the upper stage of the GSLV is cryogenic (CUS)? Other countries have used cryogenic engines on earlier stages in a rocket to lift heavy loads. I would love to know the rationale behind this configuration. Thank you and good luck to ISRO. Anant, it is incorrect to state that ...
by member_25400
25 Dec 2013 12:19
Forum: Military Issues & History Forum
Topic: INS Vikramaditya: News and Discussion
Replies: 1524
Views: 121575

Re: INS Vikramaditya: News and Discussion

Guys ., whats the take on the large carrier / small carrier argument 1. USN studies prove that a larger carrier is more cost-effective than smaller ones. i.e You get more bang for your buck with large supercarriers. 2. OTOH, large carriers and indeed the carrier group, represent a *substantial* cos...
by member_25400
23 Dec 2013 08:16
Forum: Military Issues & History Forum
Topic: INS Vikramaditya: News and Discussion
Replies: 1524
Views: 121575

Re: INS Vikramaditya: News and Discussion

Klaus: Is there a possibility that India might be able to pick up one of the to be mothballed, under construction QE class A/C in the future? Could buy for a percentage of the current price A decision on the QE carrier is expected 2014 (and will likely depend upon budget vs force outook at that tim...

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