Bharat Rakshak

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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...

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..... 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...

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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...

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. 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 ...

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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...

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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.

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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...

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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.

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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...

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"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...

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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...

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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...

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. 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...

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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...

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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...

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Deleted duplicate post

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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....

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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...

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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 ...

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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...

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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, ...

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[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...

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"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...

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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...

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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...

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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 ...

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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...

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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...

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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...

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^^^^^^^^^^^^^^^^ 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...

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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'...

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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...

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* 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 ...

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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

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, 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...

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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...

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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...

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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 ...

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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...

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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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