K5 MISSILE TEST FIRED

[Safriz]

Where did you get such info that cooling is needed? high temp radiation Hardened electronics is used not some delicate microchip and maintaining a tolerable temp is enough. Re-entry vehicle material technology is designed in a way to never let the inside temp. rise above a given value (40-50 C). Developing such a material is the major challenge in designing a reentry vehicle and that is one of the reasons why not many countries can build ICBM. Same is the case for scramjet powered hypersonic vehicles.

Hmmmm..
Post some links......

 

[indushek]

Hmmmm..
Post some links......

Might be ablation shield used on mirv's.

 

[indushek]

Hmmmm..
Post some links......

Here is a link, which does speak about the thermal protection system on hypersonic vehicles.

ESI Group CFD Portal - CFD-FASTRAN/CFD-ACE+ coupling for thermal environment simulations

 

[Vasily Zaytsev]

Now lets here from the ubiquitous Ajay Shukla ... what he thinks of the latest underwater missile test and some more information.


Submarine missile test a step forward



Submarine missile test a step forward
Underwater launch of B-05 missile went according to plan
Ajai Shukla / New Delhi Jan 29, 2013, 00:41 IST


Even in the visually spectacular field of missile testing, the sight of a submarine-launched missile breaking through the surface is a breathtaking one. Yesterday, Defence Research and Development Organisation ( DRDO) scientists cheered excitedly as their indigenous, submarine-launched ballistic missile (SLBM) leapt out of the water, its rocket motor fired soon after clearing the surface, and it soared off in a white plume to accurately strike a target 700 kilometres away.


To nobodys surprise, the underwater launch went exactly according to plan. This missile, called in turn the K-15, the Shaurya and now the B-05, had already been launched 10 times from under water and thrice from land. This exacting test schedule is designed for assurance, since this is a missile that cannot afford to fail. Until a better one is developed, this will be the backbone of Indias underwater nuclear deterrence.



That means it will arm the INS Arihant, Indias first and only nuclear-armed ballistic missile submarine, or SSBN. Tipped with nuclear warheads, the K-15 will be launched from the Arihant only after a nuclear attack on India. New Delhis no-first-use nuclear policy prohibits the pre-emptive use of nuclear weapons.



That means Indias land-based and air-based nuclear weaponry, such as the Agni series of missiles, might already have been destroyed by a pre-emptive enemy nuclear attack. The Arihant, and the B-05 missiles that it carries, are far more difficult to tackle, since they lurk underwater in complete secrecy. The underwater leg of the nuclear triad (land-launched, air-launched and submarine-launched weapons) has always been regarded as the most survivable. It is the ultimate currency of a nuclear exchange.



Going by what the DRDO said about its own test, the B-05 is well up to the task. The missile, developed by DRDO, was launched from a pontoon and was tested for the full range. It met all the mission objectives. The parameters of the vehicle were monitored by radar all through the trajectory and terminal events took place exactly as envisaged, said a ministry of defence release yesterday.



The B-05 is no ordinary ballistic missile. Top DRDO scientists briefed Business Standard that it is not a ballistic missile at all. It could better be characterised as a hypersonic cruise missile, since it remains within the earths atmosphere.



A ballistic missile suffers from inherent disadvantages, since it is a relatively crude device, akin to a stone lobbed upwards, propelled by a rocket. After the rocket burns out, gravity comes into play, pulling the missile warhead down towards the target. Buffeted by wind and re-entry forces, accuracy is a problem; and, since the ballistic missiles path is entirely predictable, shooting it down is relatively easy.



The Shaurya has overcome most of these issues. Its solid-fuel, two-stage rocket accelerates the missile to six times the speed of sound before it reaches an altitude of 40 kilometres (125,000 feet), after which it levels out and cruises towards the target, powered by its onboard fuel. In contrast to conventional ballistic missiles that cannot correct their course midway, the Shaurya is intelligent. Onboard navigation computers kick in near the target, guiding the missile to the target and eliminating errors that inevitably creep in during its turbulent journey.


I would say the Shaurya is a hybrid propulsion missile, says Dr V K Saraswat, the DRDO chief, talking to Business Standard in 2010. Like a ballistic missile, it is powered by solid fuel. And, like a cruise missile, it can guide itself right up to the target.



Making the B-05 even more survivable is its ability to manoeuvre, following a twisting path to the target that makes it very difficult to shoot it down. In contrast, a ballistic missile is predictable; its trajectory gives away its target and its path to it.



The problem with the B-05 remains its relatively short range of just 750 kilometres. While it could reach major cities in most countries if it were launched from just off the coast, that would necessitate a perilous submarine journey to the vicinity of the coastline. Therefore, the DRDO is also developing a longer-range missile, dubbed the K-4, which will have a range of almost 4,000 kilometres. An Indian SSBN armed with the K-4 missile would be able to strike most likely targets from a safe patrol location in the Bay of Bengal.

 

[SpArK]

Achievement of mastery over a sequence of esoteric technologies by our scientists.

These include;

• Safe underwater ejection of the missile
• Ignition of its rocket-motor at the moment of breaking surface
• Control during its ballistic-trajectory
• Precise delivery of its payload over the target.

All that remains to be tested are:

• How the K-15′s nuclear warhead will fare during its hypersonic flight
• White-hot re-entry into the atmosphere with it.
• Kind of explosive yield that its nuclear blast will deliver.

However, the last bit may remain an unknown, in view of India’s self-imposed 1998 test-moratorium and the comprehensive test-ban treaty.

 

[Screambowl]

You are suggesting a very long burnout time...
For a single stage solid fuel missile it cant be possible..

i was talking about how a missile remains stable without any parameters of lift and drag and without using large wings.

It is like a bullet only. Just imagine at every point the same and increasing vectored is applied (equal or greater to during cartridge blast inside the barrel) through out the path before it reaches a predesignated height just before re entry, the bullet will remain in air without wings.

 

[Safriz]

hi,
Has Ajay Shukla written something on his blog about it?
can somebody post a link?
I will post all the questions i wrote here,on his blog...

 

[illusion8]

[*]Ignition of its rocket-motor at the moment of breaking surface

However, the last bit may remain an unknown, in view of India’s self-imposed 1998 test-moratorium and the comprehensive test-ban treaty.

This would be because the missile will require the surface of the water for greater propulsion...right?

second, India has been building nuke reactors for it's nuclear sub, also closely experimenting with the nuclear reactors for power generation, it also builds super computers which can be used for virtual nuke detonation study - wouldn't that be nearly equivalent to actual nuke tests?

 

[Capt.Popeye]

Achievement of mastery over a sequence of esoteric technologies by our scientists.


All that remains to be tested are:

• How the K-15′s nuclear warhead will fare during its hypersonic flight
• White-hot re-entry into the atmosphere with it.
• Kind of explosive yield that its nuclear blast will deliver.

However, the last bit may remain an unknown, in view of India’s self-imposed 1998 test-moratorium and the comprehensive test-ban treaty.

From this part, 1 and 2 are predictable, from data with ISRO.
About 3 data is there with AEC, plus computer modelling and simulation are available tools. Most countries have stopped testing because there is less need to. Not exactly unknown territory.

 

[S-DUCT]

hi,
Has Ajay Shukla written something on his blog about it?
can somebody post a link?
I will post all the questions i wrote here,on his blog...

Sir,I think k-15 missile inherits BGRV tech.
ww.slideshare.net/ramana_56/bgrv-and-indian-missiles-arun-vishwakarma-rev-1-c-9600008

Sir,in page no-14 has flight profile of k-15 missile,which shows that

MISSLE MODE RANGE MAX ALTITUDE
HCM 700km 30km
BM 1.8-2K km 200km

this report matches with current results of achieving 700km from altitide 30km.

 

[kurup]

Sir,I think k-15 missile inherits BGRV tech.
ww.slideshare.net/ramana_56/bgrv-and-indian-missiles-arun-vishwakarma-rev-1-c-9600008

Sir,in page no-14 has flight profile of k-15 missile,which shows that

MISSLE MODE RANGE MAX ALTITUDE
HCM 700km 30km
BM 1.8-2K km 200km

this report matches with current results of achieving 700km from altitide 30km.

Here again.

 

[kurup]

Sir,I think k-15 missile inherits BGRV tech.
ww.slideshare.net/ramana_56/bgrv-and-indian-missiles-arun-vishwakarma-rev-1-c-9600008

Sir,in page no-14 has flight profile of k-15 missile,which shows that

MISSLE MODE RANGE MAX ALTITUDE
HCM 700km 30km
BM 1.8-2K km 200km

this report matches with current results of achieving 700km from altitide 30km.

Another thing is that the presentation actually shows three flight modes for B-05.

1. BM with 1200+ km range attaining some 200 km apogee following a pure ballistic trajectory.
2. BM with 2000+ km range with same apogee with hypersonic ballistic glide at terminal stage.
3. CM/QBM with 700+ km range and 40 km apogee.

 

[S-DUCT]

Another thing is that the presentation actually shows three flight modes for B-05.

1. BM with 1200+ km range attaining some 200 km apogee following a pure ballistic trajectory.
2. BM with 2000+ km range with same apogee with hypersonic ballistic glide at terminal stage.
3. CM/QBM with 700+ km range and 40 km apogee.

So,can we say that B-O5 missile is world most unique missile?
If yes, then hat,s off to DRDO

 

[Safriz]

The first stage falls off at 15 seconds...
It does look like the Fins remain intact after that..and missile remains manoeuvrable and able to maintain a level flight due to two sets of wings/Fins...

 

[Safriz]

can somebody estimate the burnout time of second stage?
Take into account the length of first stage which is small,and estimate time as per burnout time 15 seconds of first stage...