Bharat Rakshak

Brahmos-2 is expected to be a re-usable missile exhibiting features similar to CVS401 Perseus concept from MBDA.



You are talking about theater wide SAM system with hypersonic booster. Of course possible. Aster family do have such concept. But in case of SAM, response time is critical. And then there is economics and many other factors to be considered.

But before that, fighter Sqdns deployed with AWACS can take control of such threat.

hypersonic != cheap

they will be Nx more costly than a brahmos for sure given the exotic materials and project cost involved.

might be reserved for high value roles.

Sirji, in today's world any motivated industrial country can make rudimentary Cruise missile provided it do have access to some moderate mini turbo engine. But what differentiates between an ordinary Cruise missile and world class state of the art one is the Guidance and additionally its sensor.

One can understand the importance of Guidance as we go through the failures of Cruise missiles.

So do ask what differentiates and what made Brahmos world class missile from Yakhont misile. The answer, of all other things, is Guidance.

The Hindu has a article today mentioning that the K-15 is ready for induction and has already been placed into production after its last successful test off Vizag.
The K-4 will undergo pontoon trials later this year/early next year.

Anyone able to locate the article in online edition?

Here is the article:

India to integrate K-15 missiles into nuclear submarine soon

I am posting the above article in full, courtesy The Hindu.

I hope that that K4 has a range of 3000 kms. for a 3 ton payload

Few trial launches needs to be carried out from actual submerged platform..

What does 80MWT transalte to in MWE? 16?

^^33 MWe Approx

^^Wouldn't that depend on the efficiency of the reactor?

It would depend more on the efficiency of the turbine
K

did they say, everything is ready to go on the reactor ?

true if its steam turbine direct propulsion.

If a pumpjet propulsion is used would a nuclear reactor have more efficiency ?

There is no way a nuclear reactor can directly "generate electricity that powers electric motors connected to the propeller shaft". Essentially a nuclear reactor generates heat which in turn generates steam. This steam can be used to drive a propellor / shaft in a ship or a turbo generator to generate power either on land or at sea.

K

a pumpjet propulsor might need more power. someone has got to force this water into the funnel


It funnels water through a lampshade causing an increase in pressure at the locations where the blades slices through the fluid media. This increase in pressure delays the onset of cavitation. Cavitation happens when vaccuum "bubbles" form at the trailing edges of the blades when they travel through the liquid faster than the water can rush back in to fill the void they leave as they pass. As pressures increase, the propeller at which the onset of cavitation occurs also increases. This is why subs are "silent" up to a higher speeds as they dive deeper.

The lamp shade also shields the sound made by the propeller in most of the lateral directions. This makes the sub quieter laterally but may increase their sound signature longtidually -- especially dead astern.

The Ohios are very quiet with or without a pumpjet propulsor. They are quiet enough that the soviets are said to have never tracked one after it dives in deep water. One of the features of the submarine is that at slow speeds (low reactor output) the coolants are circulated through the core through natural convection without any pumps being used. The Ohios spent most their time at very slow speeds while on patrol. At 3~5 knots, it is doubtful if a pumpjet makes a difference.

Is it very difficult to get a thermal signature of the sub in such a case (discharging warm/hot water, used as coolant, into the sea)?

the coolant in any reactor will be a sealed system I think because the water is flowing over the rods and is radioactive. the steam will pass in sealed pipes through another vessel where non-radioactive water outside is heated to steam and this 2nd stage steam drives the turbine , gets cooled somewhere and fed back again.

I am sure they arrange for cooling any hot water discharge to ambient sea temp. there are even strict procedures about disposing off kitchen waste per my reading...they are not allowed to float up and leave a trail.

cost is not an issue - ohio subs have a gym for employees with all eqpt like treadmill isolated from floor on hydraulic jacks.

the higher the efficiency of heat exchanger, the better is the power generation. sodium cooled fast reactors could have direct contact from liquid metal to water is an advanced choice, perhaps.

As discussed above there will be an interphase liquid which will cool the reactor coolant.
This interphase liquid, usually treated fresh water will then be cooled with sea water. The copious amounts of sea water that are used to cool the intermediate coolant, ensure that the difference in seawater temperature, in and out,of the heat exchanger is 2-5 deg c, if this is discharged 20-30 meters below sea surface it will be very difficult to detect by airborne sensors. Especially in the tropics where there is a large difference in temp between the surface and 20 mtrs below it. There is a possibility of the steam condensate cooling system and this system being linked making it quite a complicated system.

Sorry for being OT this shoud not have been in the missile thread.

Thanks Eric and others. I should have clarified in my post - I was talking about the last stage coolant. Your explanation helps. Sorry for the OT question!

Real-time Trial of Interceptor and Simulated Missiles on Nov. 23 - T.S.Subramanian in The Hindu

The future planned simultaneous Endo/Exo test (was scheduled for Dec 2011) would cause browning material to appear in the Endo-Exo zone of a lot of pants in Shitistan.

Could we not place interceptor batteries in A&N and launch targets from the mainland?

Should the DRDO be able to integrate this BMD system Endo/Exo interceptors and the Barak - 8 SAM with the required radars on a destroyer, it would offer the IN a formidable theater Air defense capability ala Aegis that could be part of a future IN CVBG/CSG. However, it is hard to say how good this BMD system would be against a hypersonic maneuvering kill vehicles like the DF-21's warhead at this stage.

Iron Dome for Desh?

Interesting it is seen as a counter for Nasr as well

Akash should be enough for Nasr. what they need it good early detection capability

^^^

Akash is better utilized for maneuvering targets, and Nasr is a short range ballistic rocket

Looks more like a advertisement. The LeT launching home made rockets at us should hardly be a worry when we have the conventional Pakistani army launching proper artillery projectiles even during a so called "ceasefire".

Eagerly waiting for today's BMD test results.

if it has hasn't happenned till now, it will probably not happen today

News Flash: India test fires supersonic interceptor missile

India successfully test fires supersonic interceptor missile: India today successfully test-fired an indigenously developed supersonic interceptor missile, capable of destroying a hostile ballistic missile, from a test range off the Odisha coast.

"At around 12.52 hours, the interceptor hit the target missile successfully at an altitude of about 15 kilometres," DRDO spokesman Ravi Kumar Gupta said.

India is working towards development of a multi-layer Ballistic Missile Defence system. The test was conducted to validate various parameters of the interceptor in flight mode, said a defence source.

WHERE IS MY LUNGI..

Link

The Ghauri's and Ghajnavi's will be intercepted by Prithvi ( Raj Chauhan) yet again. History repeats itself.

I am awaiting the first test of the big sticks AD1 and AD2 - capable of taking on DF21x class missiles.
probably swing role ASAT weapons against LEO & MEO sats as well

it is time...

Interceptor missile scores a direct again

Signalling India’s readiness to deploy the home-grown Ballistic Missile Defence (BMD) system in the near future, an advanced interceptor missile destroyed an incoming target missile in a direct hit at an altitude of 15 km over the Bay of Bengal on Friday.

In Friday’s mission, missile technologists from the Defence Research and Development Organisation (DRDO) for the first time tested the configuration for destroying an incoming actual missile and another electronically simulated missile.

According to top DRDO sources, the electronically simulated target which mimicked a missile coming from a distance of 1500 km, was electronically hit at an altitude of 120 km.

Within minutes of the launch of the real attacker missile, a modified surface-to-surface Prithvi from Chandipur, the actual interceptor , Advanced Air Defence (AAD) missile took off from Wheeler Island and destroyed the ‘hostile’ missile at an altitude of 15 km in the endo-atmosphere at 12.52 p.m.

As soon as target missile was launched, the Long-Range Tracking Radars and the Multi-Functional Radars tracked it and passed on the data to the guidance computer to launch the AAD, which homed on to the target missile and pulverised it.

Scientific Advisor to Defence Minister V.K. Saraswat, Chief Controller, (Missiles and Strategic Systems), Avinash Chander, Associate Director, Research Centre Imarat, Sateesh Reddy and Programme Director, (AD Mission) Adalat Ali were present.

Celebrations broke out at Wheeler Island following the success of the mission, which was the eighth ballistic interceptor missile test. So far seven missions have been successful and one of them, the first one was conducted in exo-atmopshere at an altitude of 48 km in November 2006.

Before the first actual BMD test (exo-atm) was carried out in 2006, interception was done electronically as done today.