AEGIS and AEGIS Like escort combatants of the World

Re: JMSDF Akizuki Class DDG (19DD AEGIS-like)

Bltizo said:

Interesting -- is the intention to produce a surface launched missile based off AAM-4 that can achieve SM-6 ranges, or an air launched AAM based off AAM-4?

I find it very difficult to imagine an AMRAAM sized missile having a slant range of over 200km. Flipside, is that if an AMRAAM sized missile can achieve that kind of range eventually, then an SM-6 sized missile could theoretically be able to achieve many times that (whether they have the electronics to engage such a target is another matter of course).

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Sorry I never intend to imply that DRE AAM-4 will have similar range of SM-6 which I believe is somewhere around 350Km but the normal version has a range of 100Km.
Before we go further I believe that we need to understand the difference between conventional solid rocket propellent and the propellent for Ducted Rocket Engine.
Solid rocket propellent consists of two components, an accelerant(fuel) and oxidizer in which the two chemically react as combustion to gain thrust. On the other hand, Ducted Rocket Engine propellent consists of only an accelerant in which is heated to evaporate the solid propellant and then mixed with air in another chamber where it is combusted to gain thrust.
The greatest gain of this technology is that theoretically it carries twice the amount of energy compared to conventional solid rocket since it does not carry any oxidizer.

This is purely speculation but I believe that the DRE AAM-4 would have a range somewhere around 200Km and a ship launched missile will have similar range equipped with a small initial booster stage similar to a cruise missile.

Re: Indian Kolkata Class DDG

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AEGIS-like vessels of the World said:

Almost seven years after its launch, the INS Kolkata, the new, powerful Project 15A destroyer class for the Indian Navy, began conducting its sea trials in the summer of 2013.

During the sea trials, machinary issues were noted and the vessel returned to the builder's ship yards to repair associated gearing problems.

Official christening therefore was delayed from late 2013 until the Spring of 2014. She is expected now to be in service in 2015, almost nine years after launch. It is expected that all three vessels will now be in services by 2017, each of the other vessels following one year after the other.

The newer variant, the Project 15B vessels, of which four will be built, have started construction and the first is expected to be launched in 2016 and inducted in 2018.

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In addition, the Indian Navy has now commissioned all three of its new, Project 17 Shivalik guided missile frigates (which at 6,200tons are really guided missile destroyers)


Seven improved variants are to be built, the Project 17A frigates. The first started construction in late 2013. For these vessels, Lockheed Martin and Hyundai Heavy Industries have jointly responded to the Project 17A combat systems Request for Information (RFI) issued by the Indian Navy and ar eoffering the Aegis Combat System as the principle weapons control system for the vessels.

This means that by 2020, the Indian Navy hopes to have the following very new and modern major combatants in service:

2 x Aircraft Carriers (Virkamaditya and Vikrant)
5 x Kolkata (A/B) Destroyers.
6 x Shivalik FFGs
9 x Talwar FFGs (6 in service, 3 more building)
6 x Kamorta FFGs (3 launched, 3 building/planned)
2 x Akula II SSNs (one in service a second to be leased from Russia by 2017-2018)

Which does not take into account their older Delhi class DDGs, Brahmaputra FFGs, and Kora FFGs (another 11 vessels total).

Re: Indian Kolkata Class DDG

I have to say, the kolkata's gun definitely doesn't look big enough to be a 130mm.

If anything, it resembles the oto melara 76mm

Re: Indian Kolkata Class DDG

Bltizo said:

I have to say, the kolkata's gun definitely doesn't look big enough to be a 130mm.

If anything, it resembles the oto melara 76mm

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The turret is definitely a stealth version of the Oto melara 76.

Re: Indian Kolkata Class DDG

Bltizo said:

I have to say, the kolkata's gun definitely doesn't look big enough to be a 130mm.

If anything, it resembles the oto melara 76mm

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It is a Oto Melara 76mm gun.

The earlier Delhi class DDG carries an AK-100mm gun. The Talwar class FFGs (from Russia) carry a 100mm gun, the A-109E, their new indigenous Shivalik FFGs (which are destroyer sized vessels) carry the same Otobreda 76mm gun as the Kolkatas.

Re: Indian Kolkata Class DDG

Jeff Head said:

It is a Oto Melara 76mm gun.

The earlier Delhi class DDG carries an AK-100mm gun. The Talwar class FFGs (from Russia) carry a 100mm gun, the A-109E, their new indigenous Shivalik FFGs (which are destroyer sized vessels) carry the same Otobreda 76mm gun as the Kolkatas.

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I think it is the radip fire Oto Melara 127/64 LW, 127mm main gun with upto 120 km range with Vulcan LR finned and canard GPS+laser guided ammunition .

The gun have a primary role of surface fire and anti-aircraft as secondary role.

The Vulcan LR module can operate both as a standalone or in a network concentric environment.

Re: Indian Kolkata Class DDG

[video=youtube;-unZOJEZjC4]http://www.youtube.com/watch?v=-unZOJEZjC4#t=41[/video]

Re: Indian Kolkata Class DDG

Apong said:

I think it is the radip fire Oto Melara 127/64 LW, 127mm main gun with upto 120 km range with Vulcan LR finned and canard GPS+laser guided ammunition

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I am quite sure that the gun we see on that 1st Kolkata is in fact a Ota Melara 76mm, 62 caliber super rapid fire gun.

It is capable of shooting the 76mm version of the Volcano round out to 40 km.

Re: Indian Kolkata Class DDG

Yeah I also am pretty sure it's the 76mm gun, simply compare the turret geometries




76mm


127mm




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I must say, 76mm seems like a rather light gun mount on a destroyer. Of course, that isn't to say the kolkatas lack for anti surface punch, given they'll be carrying sixteen brahmos, however I still would have expected something larger than a gun more suitable to a frigate or a corvette.

In any case, looks like the wikipedia entry for this class missed the boat on this one.

Re: Indian Kolkata Class DDG

Bltizo said:

Yeah I also am pretty sure it's the 76mm gun, simply compare the turret geometries

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I must say, 76mm seems like a rather light gun mount on a destroyer. Of course, that isn't to say the kolkatas lack for anti surface punch, given they'll be carrying sixteen brahmos, however I still would have expected something larger than a gun more suitable to a frigate or a corvette.

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Yep. Here's a closer look:


As to why the Indians chose the 76mm...I just can't say. They are equipping the same gun on their Shivalik Project 17 Frigates, which at 6,300 tons are really destroyers themselves. So maybe they decided to standardize on their indigenous vessels.