Rao ji, no Sir with me. And no i don't have an idea how that worked or the point of launching it in that manner. But it was wet for sure..Now, to the post you have made, do you know - for sure - what that device is? Is it is a tech-demo?
![Smile :)](./images/smilies/smile.gif)
Rao ji, no Sir with me. And no i don't have an idea how that worked or the point of launching it in that manner. But it was wet for sure..Now, to the post you have made, do you know - for sure - what that device is? Is it is a tech-demo?
Akash is just one of possible options. The main advantage of a ramjet is that it does not have to carry the oxidizer en masse for the sustainer, and also offers end game energy.Dharma R wrote:There was some talk about using akash propulsion system,might get modified for extended range.SaiK wrote:Indian ARM sounds cool. Any specs?
Since Astra uses tech developed for Trishul SAM and gets a decent range in AAM role, it is plausible that the above range in an AGM role.ramana wrote:KaranM, As part of IGMP, Trishul based ARM was in the cards. It had a very long range ~110km. Wings of Fire alludes to it. Norman Palomar the US expert used to write about it in the late 80s.
pankajs wrote:Agni-V — guidance on chipResponding to my earlier blog on the advanced chip-embedded guidance system successfuly tested on Agni-V, an expert at the cutting edge of these technologies emailed me the following. It will flesh out the understanding of interested readers so I’m copying it here:
“With regards to your latest article, the “fly-by-wire” concept in the A-5 comes from digitally connected multi-channel communications within its body for the control system, thereby reducing a lot of the cabling that would have otherwise gone into these missiles. This serves to reduce the risk of failure in the missile system and increases dependability.
“With regards to the embedding of the guidance system on chip (SOC), which enables the A-5 to possess superior accuracy, there is indeed an on-board computer on the A-5, which is more powerful than any used in previous vehicles. However, previous computers had severe weight, space, and cooling constraints. The guidance SOC based computers that weigh just 200 grams and possess around 7-10 times greater processing power than their predecessors. The embedded guidance SOC concept requires very little power, imposes much less space constraints, requires far less cooling, and, also very importantly, is not only more reliable and efficient, but also allows for far greater flexibility when choosing the warhead configuration.”
India is developing an Anti-Radiation Missile (ARM) which can hugely multiply the strike capabilities by destroying the enemy’s advance warning system.Production of the ARM, which are among the most advanced missiles, is being undertaken on priority basis by the Defence Research and Development Laboratory (DRDL), which specialises in the missile development.
Such missiles can be mounted on Sukhoi fighter planes Su-30 MKI, 140 of which have already been acquired by India from Russia and around 100 more are expected to be delivered in due course of time.
These missile can detect a radar by tracking its electro-magnetic radiation and pulses generated, an official told PTI, adding these would be independent of the radar wavelength and be able to destroy it.
Beyond Agni-5
Go for ICBMs and thermonukes, says N.V.Subramanian.
25 April 2012: Now that the slightly over-the-top celebrations of Agni-5's test have ceased, some harsh truths must be told. Agni-5 has a five-thousand-kilometre range and can carry a one-ton nuclear payload. For India's strategic requirements, that is not enough.
Without stating who India's enemies are, the country must have deterrent capacities to reach anywhere, anytime. Since India is also a self-proclaimed second-strike power, it becomes critical to have credible and secure deterrents, and our current inventory is unsatisfactory.
From available evidence, it appears that India will deploy boosted fission warheads on missiles like Agni-5. It confirms that the thermonuclear devise tested on the first day of Pokhran II failed. The boosted fission trigger worked but couldn't ignite the paired fusion bomb.
The Indian nuclear scientific establishment has its own explanation for the low yield of the thermonuclear device. It has never satisfied the world. You can take the attitude that it doesn't matter what the world thinks. In other walks of life, that may work. But not when it comes to deterrent weapons.
Deterrent weapons not only have to be repeatedly tested for perfection. But they must satisfy the rest of the world. Only from world satisfaction comes credibility for a weapon system. If a deterrent is not credible, it is not worth having, and positively dangerous to flaunt.
It is possible that India has built a viable thermonuclear device after the Pokhran II fizzle. But this or a future Indian government will have a hard time testing it, especially as it will have a bearing on the Indo-US nuclear deal and the uranium fuel and reactor contracts flowing from it. Sooner or later, however, India has to overcome the obstacle and test -- and the sooner the better.
The Agni-5 test has produced little protest from major powers, which means there is greater reconciliation to India's military nuclear status. That should give India the creative opportunity and space to test a thermonuclear weapon. To stress, the sooner it is done, the better.
Boosted fission warheads that Agni-5 and longer range missiles are expected to carry have the bang, so to speak. But thermonuclear devices have more bang for the buck. With far better yield-to-weight ratios than fission or boosted-fission devices, smaller and lighter fusion warheads would cause vast destruction at greater distances. Which is where, therefore, Indian weapons' designs and tests must head, if the country must be counted as a serious weapons' power.
Which in turn leads to the quality, Indianness and reach of our missiles. Of course it is not a matter to tom-tom that you have missiles that go to the top end of ICBMs, but there is robust deterrent logic to have them. The longer the range of missiles, the more deployment options you have, and at greater strategic depth.
For example, it cannot make sense to deploy deterrent weapons in Jammu and Kashmir or Assam where they are most vulnerable to a first-strike. The longer the missile range, the further inland it can be deployed. But there are limits to the security of land-based deterrent systems. The Andamans may seem a long way away from the threats from the North and West, but weapons systems deployed there are vulnerable from sea and natural calamities.
A sea-based deterrent is more secure. But whilst it demands the most sophisticated, secure, fool-proof and fail-safe fire control, command and control and informational systems, its foremost requirement, after SSBNs, is long range missiles. And the longer the range of missiles, the more secure your deterrent.
Hence, whilst Agni-5 is a good starting point, India must place no ceiling on the missile range. If an Indian IRBM is acceptable to the world, why not an ICBM? And our need is for the longest range of ICBMs, so that we have secure deterrents deployed in any of the waters of the world. And with tested and perfected thermonuclear weapons, the world would accept the credibility and soundness of our deterrent.
That is where India should be headed.
They might be vulnerable, but provided enough defenses, they are the best bet against terrain hugging CM`s.SaiK wrote:wouldn't aerostats more vulnerable than ground based movable setup like samyukta and sangraha.. of course the range should be a concern at 500km requirement. Now, we can think of relays based distributed setup, with nodes on high bandwidth secure channel.
in the process of guided testing phase from ground with onboard seeker.sum wrote:^^ What is the news on the Astra??
There was a flurry of Ground tests 2 years back and suddenly everything quiet after that?
If my memory serves right, they were done in late 2009 and then in early 2010.krishnan wrote:Flight tests inboard MKI were done from ground ???
I was just working with google unkil and found this concept of USSaiK wrote:^.
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It is imperative that protection against CM, but aerostats alone is not a strong solution, rather pretty much weak. terrain hugging low flying CMs have long incubation time considering our neighborhood capability (chippanda club).. even then 300km is what we could think.. let us not give into brahmos like counter missile is already available with our enemies.
From a setup angle, we have time to establish radar network, around cities, important installations, etc. that may include aerostats as some specific area protection rather a all eggs in a basket solution. distributed network is mandatory.. installing on top of all tall buildings, all large ships, all hilltops, etc is a necessacity.
Again, we have to measure our threat perception, and priorities before we suddenly think aerostats is the only way. Once blown to pieces, they provide nothing... they are not just vulnerable, but will cause a grave disaster if shot down [like bikini wearing beach girls].
http://www.defenseindustrydaily.com/jle ... ore-02921/“The JLENS system consists of four main components: the aerostats, the radars, the mooring station and the processing station. The aerostats are unmanned, tethered, non-rigid aerodynamic structures filled with a helium/air mix. The aerostats are 77 yards long (three-fourths of a football field) and almost as wide as a football field. The aerostats must be large enough to lift the heavy radars that provide the system’s extended range. The radars are optimized for their separate, specific functions, but weigh several tons each. The surveillance radar searches very long distances to find small radar cross-section tracks before they can threaten friendly assets. The fire control radar looks out at shorter ranges than the surveillance radar, but provides highly accurate data to help identify and classify tracks while providing fire control quality data to a variety of interceptors. The two aerostats are connected to the ground via tethers through which power and data is transmitted. The tethers enables the aerostats to operate at altitudes of up to 15,000 feet and contain power lines, fiber-optic data lines and Kevlar-strengthened strands surrounded by an insulated protective sleeve. The tethers connect to mobile mooring stations that anchor the aerostats to the ground and control their deployment and retrieval. The mooring stations are connected to ground-mounted power plants and processing stations. The processing stations are the brains of the whole system. Each processing station contains an operator workstation, a flight-director control station, weather-monitoring equipment and a computer that controls radar functions and processes radar data.”
Confidence!!!!!He also informed that the controlled navigation flight trial of Long-Range surface-to-air missile (LR-SAM) would be conducted in June which will be followed by a series of flight tests to prove complete efficacy of the system.
"By 2013 you will see LR-SAM completing its flight trial and it is expected to be inducted in 2014," Saraswat said adding the Medium Range surface-to-air missile (MR-SAM) was also getting ready, being in advanced stage of development and is likely to get into service by 2015.
Cool, someone to back me!!!Go for ICBMs and thermonukes, says N.V.Subramanian.
It looks like the following:NRao wrote:Huge scope for exporting weapon system:DRDO chief
...He also informed that the controlled navigation flight trial of Long-Range surface-to-air missile (LR-SAM) would be conducted in June which will be followed by a series of flight tests to prove complete efficacy of the system.
"By 2013 you will see LR-SAM completing its flight trial and it is expected to be inducted in 2014," Saraswat said adding the Medium Range surface-to-air missile (MR-SAM) was also getting ready, being in advanced stage of development and is likely to get into service by 2015.
Of course it will be done. It is just a simple matter of timing.NRao wrote:
Cool, someone to back me!!!Go for ICBMs and thermonukes, says N.V.Subramanian.![]()
There is a very small window, in which India can test and get away.
Sounds like you want to achieve DEAD (Destruction of Enemy Air Defenses) instead of SEAD (Suppression of Enemy Air Defenses)Singha wrote:...
perhaps rather than a single heavy warhead, we need a intelligent submunition to hit the place with a half dozen 40kg warheads or a cloud of cluster munitions and wreck not just the radar but the whole area of support vehicles, masts etc.
An Israeli defence bigwig said that the best ECM/ESM is a 1000 pounder down the radar antenna.srai wrote:Sounds like you want to achieve DEAD (Destruction of Enemy Air Defenses) instead of SEAD (Suppression of Enemy Air Defenses)Singha wrote:...
perhaps rather than a single heavy warhead, we need a intelligent submunition to hit the place with a half dozen 40kg warheads or a cloud of cluster munitions and wreck not just the radar but the whole area of support vehicles, masts etc.
Varoon Shekhar wrote:http://flonnet.com/stories/20120518290912400.htm
T.S Subramanian comes through again with another very fine write up. BTW, there are 2 more articles in the same issue.
So it was pure ballistic re-entry. Makes the accurate splashdown even more important.At 8-07 a.m., as the Agni-V shot out smoothly from its launch pad, roared into the sky and built up a powerful thrust, there was no doubt about the mission's success. The three stages ignited on time and their separation was clean and precise. The missile climbed to a height of about 600 km before starting to descend. The powered flight, with the three stages igniting and separating, lasted about 220 seconds. As each stage fired and decoupled, the MCC and the adjacent hall reverberated with applause. There was a long gap between the third stage separation and the re-entry vehicle knifing into the atmosphere at an altitude of 100 km. After the third stage separated and the re-entry vehicle was ejected at a velocity of about six km a second, the mood in the MCC was relaxed.
The DRDO's missile technologists were sure that “the re-entry vehicle will not go anywhere”. Even if no data were available after the powered flight phase got over, “we would have known precisely where the re-entry vehicle had gone”, they said. In fact, when the third stage ejected the re-entry vehicle at a velocity of 6 km a second, it became the fastest travelling object made by India, speeding at 25 Mach, or 25 times the speed of sound.
“The third stage separation was the determining point,” Sekaran explained later. “After that, gravity takes over. Subsequently, nothing will happen. Nothing can happen also. It [the re-entry vehicle] is a free body travelling under gravity. It becomes what you call a ballistic flight.”
Here the fireball is seen above the waters and not after the spalshdown. This is the normal way. So I don't know what Mr Luthra was listening to when he mentions the reverse.The re-entry vehicle itself is a technological marvel, housing the missile's avionics and the nuclear warhead. Indeed, it houses all the electronics systems for navigation, guidance and control and the on-board computers. The avionics are within the missile's nose cone, which is made of carbon-carbon composites. The re-entry vehicle is protected by a heat shield, which is made out of carbon composite fibre. In this mission, the Agni-V carried a warhead that mimicked a nuclear bomb but without the radioactive material....
After about 20 minutes of flight, when the dummy warhead carrying explosives erupted into a fireball and hit the waters of the Indian Ocean somewhere between Australia and Madagascar, another round of applause rang out in the MCC. The re-entry vehicle's impact point in the Indian Ocean was more than 5,000 km from Dhamra in the Bay of Bengal. The fireball was captured by cameras on three naval ships stationed downrange near the impact point. Agni-V was a spectacular success on its maiden flight itself.
Total flight time was 20 minutes ~1200 secs
With India having declared a “no first-use policy”, the significance of the success is that it will for the first time provide India with a true deterrence. It will also provide India with a powerful second-strike capability to retaliate if any other country attacks India with nuclear weapons, DRDO officials said.
...
Sekaran argued that “the critical, deciding factor was the propulsion” system used in the three stages of the missiles. This was the first time that the DRDO was test-firing a three-stage missile, all powered by solid propellants. And it took just three years to design, develop and test-fire Agni-V, with the Union government sanctioning the project in 2008. “The time taken from designing the vehicle to flying it is only three years. It is a historic record. There is no doubt about that in my mind,” Sekaran said.
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While Agni-III missiles ejected the re-entry vehicle at a velocity of 4.2 km a second, Agni-V ejected it at a velocity of 6 km a second. “This is a new dispensation in terms of higher velocity. At the end of the day, you have to survive the re-entry and then only you can deliver. The particular heat shield we made for Agni-V is the strength of the ASL,” the ASL Director said.
As the re-entry vehicle comes down through the atmosphere from an altitude of 100 km to a lower altitude, the atmosphere's density keeps increasing. Once the density increases, the re-entry vehicle's deceleration breaks and the heat generated keeps shooting up. It is akin to speeding in a car when brakes are suddenly applied and people seated in the car lurch forward. “In this case, the systems are qualified for 100 G. The survivability of the re-entry vehicle is a critical area,” Sekaran said. (The re-entry phase lasts 40 seconds to 50 seconds.)
...
Although the ASL had made heat shields for previous Agni missions including that of Agni-III, the shape, size, diameter and angle of the heat shield for Agni-V was different. The heat shield's diameter in Agni-V was 1.5 metres, while it was 1.2 metres for Agni-III.
{A5 payload is different configuration than the A3! One can calculate the beta from above data for both bodies. A5 RV has higher surface area parameter than the A3. We already knwo the weights 1.1 tonne vs 1.5 tonne respectively. Assume Cd ~0.15 for a cone with radius.}
Another strength of the ASL lay in designing and developing motors propelled by solid fuel for Agni missions. For the Agni-V test flight also, the ASL designed and developed solid motors for its three stages. Besides, it developed the all-important light-weight composite for the second- and third-stage motors, which led to a reduction in their weight but far better performance. A crucial step towards developing Agni-V was taken when the ASL developed in 2007 a large rocket motor casing made entirely of carbon-filament wound composite. This casing, developed indigenously, formed the third upper stage of Agni-V. The casing went through full qualification trials in 2007.
“We never went out. The static testing of the motors was done in the same organisation [in various units of the ASL]. This is a formidable combination,” said Sekaran. The ASL also established its expertise in high-performance composites. It developed the composites for the missile motor casings and nose cone and established the process parameters for them. Then the technology was transferred to the industry for fabricating these composites. “The nose cone was fully made out of carbon composites developed by the ASL. It withstood a temperature of more than 5,0000C. You cannot make it out of metal. If you do so, the weight will shoot up,” he added.
Systems engineering is also one of the strengths of the ASL because it specialises in building up from what it already has. With the addition of a third upper stage and with minor modifications, the two-stage Agni-III metamorphosed into an awesome Agni-V. Yet the weight remained the same for both vehicles despite the addition of a third upper stage to Agni-V because the second- and third-stage motor casings were made out of light-weight composites. A lighter missile can be easily transported by rail or on road. Besides, it can carry a payload over a longer range.
In an interview to Frontline in May 2008, Chander pointed to the DRDO developing a large rocket motor casing made entirely of carbon-filament wound fibre and said, “This is a major breakthrough because it provides us the key technology for going into longer missions with light-weight missiles.... We have flight-tested Agni-III twice successfully. When we want to go in for missiles with higher ranges, one key technology is the rocket motor casing. That has been developed now” ( Frontline, June 06, 2008).
The RCI developed the navigation system for Agni-V, and its architect was the young G. Satheesh Reddy, Associate Director, RCI. “Our navigation for Agni-V was different from the one used for Agni-IV. It was a redundant, reliable system with high-performance and accuracy,” he said. Agni-V had two navigation systems: ring-laser gyro-based system and a micro-navigation system with good accuracy. Fault-tolerant features were incorporated into the navigation system and on-board computers. “Our on-board computers have been developed in such a way that they can recover transient failures. Besides, the entire data computation in avionics is highly reliable and robust,” he said.
The important technology of the inertial navigation system, guidance and control used in Agni-V was the brainchild of the RCI, said S.K. Chaudhury, its Director. All the systems were validated by advanced simulation at the RCI. The DRDL's role in the mission was to characterise the vehicle.
The DRDO's attention is now focussed on the next Agni-V launch from a canister and a road-mobile launcher in early 2013. The Shourya and the BrahMos missiles were launched many times from a canister. Chander said the DRDO had set up a facility at Shamirpet, near Hyderabad, for missile ejection tests using a gas-generator from a canister. The road-mobile launcher would be ready in May. With Agni-V scheduled to be inducted into the Army by 2015, there would be six flight tests, including three pre-induction trials.