Indian Missile News And Discussion - Printable Version +- Forums (http://india-forum.com) +-- Forum: Indian and International Forces (http://india-forum.com/forumdisplay.php?fid=8) +--- Forum: Military Discussion (http://india-forum.com/forumdisplay.php?fid=22) +--- Thread: Indian Missile News And Discussion (/showthread.php?tid=182) |
Indian Missile News And Discussion - Arun_S - 02-08-2010 Humm the same URL gave two different results. [quote name='Austin' date='07 February 2010 - 03:49 PM' timestamp='1265537512' post='103968'] [url="http://beta.thehindu.com/news/national/article102369.ece?homepage=true"]AGNI-III test-fired successfully - T. S. Subramanian[/url] Indiaââ¬â¢s longest range nuclear-capable Agni-III was successfully test-fired from the Wheeler Island, off the Orissa coast on Sunday. The more than 3,500-km range home-grown ballistic missile, believed to be most lethal of the weapon systems developed by the Defence Research and Development Organisation (DRDO) scientists, was test-fired at 10.50 hrs and covered the pre-designated range with 100 per cent accuracy, top officials told The Hindu from Wheeler Island soon after the successful launch. The solid-propelled, two-stage missile can carry nuclear warheads weighing up to 1.5 tonnes. It is 17 metres tall and has a launch weight of 50 tonnes with a two-metre diameter. When contacted, V.K. Saraswat, Scientific Advisor to Defence Minister and Director-General, DRDO, said it was a fantastic launch and a ââ¬Åhat-trick for Agni-III with three successesââ¬Â. The trajectory went perfectly according to plan till the last decimal place, he said. ââ¬ÅIt gave us full range and pinpoint accuracy,ââ¬Â he added. Avinash Chander, Agni-III mission director, called it a ââ¬Åperfect successââ¬Â, stating that all the mission objectives were met. Chander, also the Director of Advanced Systems Laboratory - which designed and developed the Agni-III - said all the events listed in the launch were executed with accuracy and described it as a ââ¬Åthrilling experience". A. Sivathanu Pillai, CEO and MD, BrahMos Aerospace, called the success an ââ¬Åimportant milestone for the country. It will lead to induction of the missileââ¬Â. The success would bring credit to DRDO scientists, he said. W. Selvamurthy, Chief Controller, Life Sciences and Human Resources, DRDO also termed it as an ââ¬Åimportant milestone in developing the country's defence and developing the second strike capability. The flight proved the robustbness of all the systems and softwareââ¬Â. With the third consecutive success of Agni-III, he said ââ¬Åit is now a proven missile. It is a big morale booster for our missile scientists and institutionsââ¬Â, he observed. A top DRDO missile technologist said the mission was a ââ¬Ågood success and the trajectory of the flight was excellent. Everything worked well, including all payload systemsââ¬Â, he added. Even though the missile did not carry a live warhead, its nuclear triggering mechanism worked well. Instead of a nuclear warhead, it carried chemical explosives, the missile technologist added. [/quote] This article URL has been augmented since when Austin posted; now it is follows: [url="http://beta.thehindu.com/news/national/article102369.ece?homepage=true&css=print"]Agni-III launch a complete success[/url] Quote:T. S. Subramanian, Y. Mallikarjun Indian Missile News And Discussion - Arun_S - 02-08-2010 [quote name='Austin' date='07 February 2010 - 03:54 PM' timestamp='1265537787' post='103969'] [url="http://livefist.blogspot.com/2010/02/first-photos-agni-iii-successfully.html?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+blogspot%2FUQMw+%28LiveFist+-+The+Best+of+Indian+Defence%29"]Pictures of Agni 3 launch ( via livefist )[/url] [url="http://4.bp.blogspot.com/_o_no4M2xEPY/S25-j8YMDOI/AAAAAAAAJTg/ma9EbajLLFA/s1600-h/DSC_0021-759501.JPG"]http://4.bp.blogspot...0021-759501.JPG[/url] [url="http://3.bp.blogspot.com/_o_no4M2xEPY/S25-kahZFtI/AAAAAAAAJTo/kvllu-axmFk/s1600-h/DSC_0023-760957.JPG"]http://3.bp.blogspot...0023-760957.JPG[/url] [url="http://3.bp.blogspot.com/_o_no4M2xEPY/S25-k0BbPNI/AAAAAAAAJTw/JjrE__SF5aU/s1600-h/DSC_0028-762700.JPG"]http://3.bp.blogspot...0028-762700.JPG[/url] [/quote] This image shows it to be almost identical to the last 3 missiles that were launched earlier. [url="http://3.bp.blogspot.com/_o_no4M2xEPY/S25-k0BbPNI/AAAAAAAAJTw/JjrE__SF5aU/s1600-h/DSC_0028-762700.JPG"]http://3.bp.blogspot.com/_o_no4M2xEPY/S25-k0BbPNI/AAAAAAAAJTw/JjrE__SF5aU/s1600-h/DSC_0028-762700.JPG[/url] I wish they will release pic of the nose section puffing just when the booster is fired. Indian Missile News And Discussion - Arun_S - 02-08-2010 Some other news clips on Agni-III test. [url="http://www.kalingatimes.com/national/news_2010/20100207_AGNI-3.htm#"]Fourth test flight of long-range missile AGNI-3 successful[/url] [center] [/center] Quote:KalingaTimes Correspondent DND: [url="http://www.dnaindia.com/india/report_nuclear-capable-agni-3-test-fired-successfully_1344488"]Nuclear-capable Agni-3 test-fired successfully[/url] Quote: Josy Joseph / DNA Sunday, February 7, 2010 15:38 IST New Delhi: Agni-3, Indiaââ¬â¢s most powerful nuclear capable missile, was successfully test-fired on Sunday. The 3,500 km-range indigenous ballistic missile is ready for induction into the armed forces. Quote:PTI [url="http://economictimes.indiatimes.com/ET-Cetera/Agni-III-successfully-test-fired-ready-for-induction/articleshow/5545399.cms"]Agni-III successfully test fired, ready for induction[/url] Quote: 7 Feb 2010, 1729 hrs IST, India successfully test-fires nuclear-capable Agni-III missile [url="http://www.hindustantimes.com/India-tests-long-range-nuclear-capable-Agni-III-missile/H1-Article1-506250.aspx"]http://www.hindustan...le1-506250.aspx[/url] Quote:Press Trust Of IndiaBalasore/New Delhi, February 07, 2010India on Sunday successfully test-fired its indigenous Agni-III ballistic missile with a range of 3500 kms from the Wheeler Island off the coast of Orissa, making the nuclear-capable platform ready for induction into the armed forces. Appears to me it did some complex maneuver after reaching apogee. Indian Missile News And Discussion - Guest - 02-08-2010 Why there is gap between upper and middle part in pict 3? Indian Missile News And Discussion - Guest - 02-08-2010 Arunji, 1. Lets say 3500km covered in 800sec with 350km altitude max. This looks like a depressed trajectory, is'nt it ? what would be its range if the same (unknown) payload is put on a max. range trajectory ? Unfortunately, I do not have access to ROCKSIM... 2. Has A-III been ever tested on a max -Q trajectory ? 3. So, it is ready for induction. Which means that unlike in the A-II case, people should hopefully not make the mistake of avoiding production trials when production shifts to BDL. 4. As of now, A-III has a better record than A-II. 3/4 vs 3/5. Even the failed trial was a partial success. Of course, development trials only validate the design. Hopefully, after A-II lessons are learnt and appropriate quality control is instituted, A-III production trials will be smooth. 5. A-V is likely to have the same first two stages an extra 3rd stage and probably the same guidance hardware, right ? Given this, would A-V trials help in further proving A-III reliability ? Indian Missile News And Discussion - Arun_S - 02-08-2010 [quote name='Mudy' date='08 February 2010 - 04:14 AM' timestamp='1265582218' post='103982'] Why there is gap between upper and middle part in pict 3? [/quote] Struss interstage; Is easy, reliable and small mass overhead. So second stage can be lighted and will separate itself from booster, while booster is coughing it last breath. No need for retro (decelerating motor) on booster. Indian Missile News And Discussion - Arun_S - 02-08-2010 [quote name='Kritavarma' date='08 February 2010 - 05:08 AM' timestamp='1265585446' post='103983'] Arunji, 1. Lets say 3500km covered in 800sec with 350km altitude max. This looks like a depressed trajectory, is'nt it ? what would be its range if the same (unknown) payload is put on a max. range trajectory ? Unfortunately, I do not have access to ROCKSIM...[/quote] There are quite a few variables to know for sure. Where did you lean the 800 second flight information? Quote:2. Has A-III been ever tested on a max -Q trajectory ? There many corners of flight envelop that require Max-Q proof flight. I am sure couple of teh sifficult Max-Q coreners has been tested in teh last 3 flights. Quote:3. So, it is ready for induction. Which means that unlike in the A-II case, people should hopefully not make the mistake of avoiding production trials when production shifts to BDL. Yes. Quote:4. As of now, A-III has a better record than A-II. 3/4 vs 3/5. Even the failed trial was a partial success. Of course, development trials only validate the design. Hopefully, after A-II lessons are learnt and appropriate quality control is instituted, A-III production trials will be smooth. Tatha-astu. Quote:5. A-V is likely to have the same first two stages an extra 3rd stage and probably the same guidance hardware, right ? Given this, would A-V trials help in further proving A-III reliability ?Not just likey it will use teh same first 2 stages. Yes it will add to A3 readability. Indian Missile News And Discussion - ramana - 02-08-2010 The three A-IIIs after the first are different from the initial vehicle. They have a thermal insulation blanket around the F/S nozzle to prevent re-entrant exhaust heating. So we should rule out the first flight. Can some one plot on probability paper the three flights? Arun_S, 800 sec is total time of flight. With the mass parameters(two stage, 50 tonne, 1.5 tonne payload) can you see what is the trajectory for 350km apogee? What is its terminal velocity? I don't like the low beta. Indian Missile News And Discussion - Guest - 02-08-2010 [url="http://economictimes.indiatimes.com/news/politics/nation/Agni-III-hits-target-meets-all-objectives/articleshow/5546745.cms"]Agni-III hits target, meets all objectives[/url] Indian Missile News And Discussion - emperor - 02-08-2010 Breaking News: Submarine Launched version of Agni is ready for testing.Though my sources refused to give me a clear range and payload,they gave me the range [5000,6700]km.and the payload varies(capable of MIRV).Necessary testing will be done from the land based launcher once the clearance is obtained and will be tested from the sub-sea later on. Indian Missile News And Discussion - Arun_S - 02-08-2010 [quote name='Chandragupta' date='08 February 2010 - 10:17 PM' timestamp='1265647197' post='103995'] Breaking News: Submarine Launched version of Agni is ready for testing.Though my sources refused to give me a clear range and payload,they gave me the range [5000,6700]km.and the payload varies(capable of MIRV).Necessary testing will be done from the land based launcher once the clearance is obtained and will be tested from the sub-sea later on. [/quote] Cool. Range can be easily determined once dimentions of its stages and total weight is reported. Here is the Payload vs range graph of Agni-3 SL (It is gratifying to note that I first coned the name Agni-III SL (Sub-surface/Submarine Launched) has become the de-facto name of the sub launched Agni. [url="http://i26.photobucket.com/albums/c109/Arun_S/PayloadandeffectivenessversusRange1.jpg"]Click here[/url] for bigger image. Indian Missile News And Discussion - emperor - 02-08-2010 Arun, since its an MIRV and most likely with use an unreliable TN which is of ?KT,I am considering that it will have 5-8 MIRV`s onboard.And I will take the upper range for the same number of MIRV`s. Can you conclude the specs that goes into ATV? Indian Missile News And Discussion - Guest - 02-09-2010 Hi Arun_S and all I joined this forum specially to interact with you guys. So glad to see that chart in a forum once again. The one question that was left unanswered from the BR missile tech thread was, What is the Agni-4? Arun_S had posed this question, and various people tried to come up with answers, including me. So I ask again, now, What is the Agni-4? Indian Missile News And Discussion - Guest - 02-09-2010 [quote name='Chandragupta' date='08 February 2010 - 11:44 PM' timestamp='1265652388' post='104002'] Arun, since its an MIRV and most likely with use an unreliable TN which is of ?KT,I am considering that it will have 5-8 MIRV`s onboard.And I will take the upper range for the same number of MIRV`s. Can you conclude the specs that goes into ATV? [/quote] Sandeep Unnithan's article on the ATV said 3 MIRVs per K-XX. There are 12 K-15s in the 4x3 rotary launchers, giving 12 warheads, and there will be 3 MIRVs per K-XX (A3SL) keeping the number of warheads the same. Indian Missile News And Discussion - Guest - 02-09-2010 Arun_S are there configuration files for the Agni-3, Agni-5, and Shaurya missiles for Rockism? Can you post the links Pl? The version I have don't have these. How can I plot a graph as suggested by Ramana? Is it possible to do this with any of MS office tools? Thanks in advance. Indian Missile News And Discussion - Infinity - 02-09-2010 Hi Arun_S Its nice to see you back in action!' Your contributions to BR wee sorely missed (though I am mere a unregsitered lurker over there). It would be really great if you could repost your old articles on "Indian Space and Missiles" on your own blog which are easy to refer to. Thanks Infinity Indian Missile News And Discussion - ramana - 02-09-2010 [quote name='gagan111' date='08 February 2010 - 07:30 PM' timestamp='1265656938' post='104007'] Arun_S are there configuration files for the Agni-3, Agni-5, and Shaurya missiles for Rockism? Can you post the links Pl? The version I have don't have these. How can I plot a graph as suggested by Ramana? Is it possible to do this with any of MS office tools? Thanks in advance. [/quote] Gagan, the use of probability paper plots is a quick way of determining the reliability at various confidence levels using rank median tables. http://www.weibull.com/GPaper/ranks2_6.htm In layman terms if you run three tests and they are all successful then you have 0.96549 reliability wiht 90 % confidence. So as you increase the test sample size you gain more reliability. The goal should be to have higher than that for detergent. If you add the first test it reduces the reliability figure. Indian Missile News And Discussion - Arun_S - 02-09-2010 [quote name='Chandragupta' date='08 February 2010 - 11:44 PM' timestamp='1265652388' post='104002'] Arun, since its an MIRV and most likely with use an unreliable TN which is of ?KT,I am considering that it will have 5-8 MIRV`s onboard.And I will take the upper range for the same number of MIRV`s. Can you conclude the specs that goes into ATV? [/quote] Given TN fizzle at POK-II and Man Mohan Singh's Civil Nuclear Agreement w/IAEA, USA and NSG, Indian missiles will not have credible TN weapon payload. The MIRV configuration will thus have to largely rely on smaller FBF weapons of 50 to 150 kt yield, sprinkled with presumably debugged TN warhead (that fizzled in POK-II). The missile range and the inventory of weapon grade Pu required will thus constrain Indian nuclear deterrence. Arihant ATV with Agni MIRV will have to live with a mixed weapons payload configuration, resulting in short legs and small boom. Consider reviewing following IDR articles that are still hosted on India Research Foundation. [url="http://www.indiaresearch.org/articles.html"]IRF Articles[/url] [url="http://www.indiaresearch.org/articles.html"]http://www.indiarese...g/articles.html[/url] In particular:
On the first article ([url="http://www.indiaresearch.org/WayToACredibleDeterrent.pdf"]WAY TO A CREDIBLE DETERRENT[/url]), pls see the MIRV configuration "L" in [url="http://www.indiaresearch.org/WayToACredibleDeterrent.pdf"]Figure 4: RV and nuclear warheads options on various Indian missiles[/url] Indian Missile News And Discussion - Arun_S - 02-09-2010 [quote name='gagan111' date='09 February 2010 - 12:52 AM' timestamp='1265656488' post='104005'] Hi Arun_S and all I joined this forum specially to interact with you guys. So glad to see that chart in a forum once again. The one question that was left unanswered from the BR missile tech thread was, What is the Agni-4? Arun_S had posed this question, and various people tried to come up with answers, including me. So I ask again, now, What is the Agni-4? [/quote] Hi Gagan ! Glad to have you here. I guess my Agni missile page analysis and projection was very bothering to DRDO, and they decided to stump with the announcement that there will not be any Agni-4 missile (I have to locate the new paper link if you need reference), instead the next missile will be Agni-V. Based on the stated range of AGni-V as 5,500 Km, it is what I postulated as AGni-4. As far as I am concerned, the Agni of Sun, irrespective it is called Surya or Sun. Will nor be surprised if the name Agni-4 will rise again as Pheonix in the form of another variant for Arihant. Indian Missile News And Discussion - Arun_S - 02-09-2010 [quote name='gagan111' date='09 February 2010 - 01:00 AM' timestamp='1265656938' post='104007'] Arun_S are there configuration files for the Agni-3, Agni-5, and Shaurya missiles for Rockism? Can you post the links Pl? The version I have don't have these. How can I plot a graph as suggested by Ramana? Is it possible to do this with any of MS office tools? Thanks in advance. [/quote] I have not put on web the Rocksim configuration files for these rockets. You can transcribe following configs: Agni-3 Payload = 2,000.0 Kg, Number of Stages = 3, Simulation Time Granularity = 0.150 Second Launch Direction = 50 degrees-North, Launch Latitude = 22.00 degrees Segment-Name ISP(Vac) ISP(SL) Stage-Mass Fuel-Fract Burn-Time Thrust-Direction Diameter Length ThrustOverdrive OverdrivePeriod Stage1 269.0 237.0, 34,000.0 0.900 090.0 Sec 51.0 Degree 2.00 Meter 07.00 Meter 25.00 % 20.00 % Stage2 290.0 190.0, 15,000.0 0.870 110.0 Sec 22.0 Degree 2.00 Meter 03.50 Meter 10.00 % 10.00 % PayloadAdaptor 000.0 000.0, 00,150.0 0.700 001.0 Sec 00.0 Degree 1.00 Meter 03.30 Meter 00.00 % 00.00 % ============================================= Configuration file: Agni-3 SL for IDR article 29Dec08 R1.cfg Payload = 550.0 Kg, Number of Stages = 4, Simulation Time Granularity = 0.250 Second Launch Direction = 0 degrees-North, Launch Latitude = 22.00 degrees Segment-Name ISP(Vac) ISP(SL) Stage-Mass Fuel-Fract Burn-Time Thrust-Direction Diameter Length ThrustOverdrive OverdrivePeriod Stage1 269.0 237.0, 27,000.0 0.905 075.0 Sec 52.0 Degree 2.00 Meter 06.60 Meter 15.00 % 25.00 % Stage2 294.0 190.0, 04,300.0 0.860 065.0 Sec 36.0 Degree 2.00 Meter 02.90 Meter 10.00 % 10.00 % SUM 294.0 190.0, 01,150.0 0.800 050.0 Sec 35.0 Degree 2.00 Meter 03.30 Meter 00.00 % 00.00 % Dummy 000.0 000.0, 00,000.1 0.880 001.0 Sec 15.0 Degree 0.01 Meter 02.00 Meter 00.00 % 00.00 % ================================== Path up from Agni-3 is via addition of another 2 meter dia motor of ~ 8 tonne mass or a Small Upper Motor (SUM) that is inside the nose cone. (See figure "L" in my article "[url="http://www.indiaresearch.org/WayToACredibleDeterrent.pdf"]WayToACredibleDeterrent[/url]" ). Following is based on SUM based configuration. Configuration file: Agni-5 add 3rd stage to -A3 29T+11T+2.6T r1.cfg Payload = 1,000.0 Kg, Number of Stages = 5, Simulation Time Granularity = 0.250 Second Launch Direction = 42 degrees-North, Launch Latitude = 22.00 degrees Segment-Name ISP(Vac) ISP(SL) Stage-Mass Fuel-Fract Burn-Time Thrust-Direction Diameter Length ThrustOverdrive OverdrivePeriod Stage1 264.0 237.0, 29,000.0 0.910 065.0 Sec 50.0 Degree 2.00 Meter 07.00 Meter 10.00 % 25.00 % Stage2 294.0 190.0, 11,000.0 0.880 055.0 Sec 28.0 Degree 2.00 Meter 03.50 Meter 05.00 % 10.00 % Stage3 294.0 190.0, 02,700.0 0.830 040.0 Sec 20.0 Degree 2.00 Meter 00.00 Meter 00.00 % 00.00 % Isolator 000.0 000.0, 00,050.0 1.000 001.0 Sec 01.0 Degree 0.00 Meter 00.00 Meter 00.00 % 00.00 % RV-fuel 294.0 200.0, 00,000.0 0.990 001.0 Sec 00.0 Degree 0.00 Meter 00.00 Meter 00.00 % 00.00 % =========================================== Shourya Configuration file: Shourya rev1B for IDR article.cfg Payload = 1,000.0 Kg, Number of Stages = 3, Simulation Time Granularity = 0.100 Second Launch Direction = 90 degrees-North, Launch Latitude = 22.00 degrees Segment-Name ISP(Vac) ISP(SL) Stage-Mass Fuel-Fract Burn-Time Thrust-Direction Diameter Length ThrustOverdrive OverdrivePeriod SolidBooster 265.0 230.0, 01,275.0 0.780 010.0 Sec 70.0 Degree 0.75 Meter 02.00 Meter 40.00 % 30.00 % Interstage 000.0 000.0, 00,020.0 0.100 015.0 Sec 70.0 Degree 0.75 Meter 00.50 Meter 00.00 % 10.00 % Stage2 275.0 245.0, 03,625.0 0.820 038.0 Sec 47.9 Degree 0.74 Meter 06.00 Meter 00.00 % 00.00 % |