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Izumo Conversion to a Full Scale Carrier

Triton

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Japan Maritime Self-Defense Force (JMSDF) 22DDH helicopter destroyer.

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Triton

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Japan to Build New Helicopter Carrier

Japan plans to build a 19,500-ton aircraft carrier capable of housing helicopters after China launched its first own aircraft carrier, Chinese media reported on Wednesday. Japan already has two helicopter carriers -- the Hyuga deployed in March 2009 and the Ise deployed in March 2011 -- but the planned new vessel will be bigger.

The 22DDH is scheduled for deployment in 2015. It will be 248 m long and cost around US$1.04 billion. It is 30 percent bigger than the Ise and can carry 14 helicopters. The Ise measures 197 m, has a displacement of 13,500 tons and can carry 11 helicopters.

Although dwarfed by China's aircraft carrier, which is 320 m long and can carry 50 fighter jets, the Japanese vessel will be equipped with the latest U.S. weapons systems to maximize its capability. It will be equipped with the Raytheon air and missile defense system, which has so far only been installed on U.S. vessels, and 11 missile launchers.

Japan had several aircraft carriers during World War II, but since its defeat it has focused on developing helicopter carriers, which are deemed purely defensive. It appears to be bolstering defenses to counter China's increasing submarine warfare capabilities. The new carrier will house mainly helicopters designed for anti-submarine warfare operations.

There are increasing calls within Japan to modify the 22DDH for fighter jets. But critics say it would be unrealistic to build such an aircraft carrier since its navy has only 45,000 personnel, and the already indebted government would run deeper into debt.

Chinese media speculated that Japan could buy Lookheed Martin F-35B stealth fighters capable of vertical takeoff and landing and base them on the new carrier.

Japan is also speeding up the development of stealth fighters and drones. Since 2009, it has invested 39 billion yen (around W562.2 billion) on development of an indigenous stealth fighter codenamed ATD-X. A prototype is expected to be unveiled in 2014, and development is to be complete in 2016.

Japan's Defense Ministry is also spending 15 billion yen this year on developing drones and robots. One unmanned helicopter has already been deployed with the Self-Defense Forces, while four prototype drones have been developed.

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Size comparison chart of JMSDF 22DDH and other aircraft carriers.

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http://www.freewebs.com/jeffhead/worldwideaircraftcarriers/22ddh-12.jpg
 

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Triton

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Artist's impressions of JMSDF 22DDH.

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Grey Havoc

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The 22DDH can trace it's origins all the way back to the JMSDF's "CVH-a" concept of the 1960's. Some interesting background on it here, as well as on the "CVH-b" concept which one could say is the ancestor of the Hyūga class DDHs.
 

Triton

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Grey Havoc said:
The 22DDH can trace it's origins all the way back to the JMSDF's "CHV-a" concept of the 1960's. Some interesting background on it here, as well as on the "CHV-b" concept which one could say is the ancestor of the Hyūga class DDHs.

Thank you for the document, Grey Havoc.
 

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I've noticed in the drawings that the island appears to be the same size, especially the stacks. Are they keeping the same machinery as the Hyuga's?
 

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Jemiba

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Michel Van said:
A destroyer ?!

Kiev-class vessels were "ASW-cruisers" in Soviet parlance to circumvent the Montreux treaty,
here it probably is to prevent dissents in the Japanese parlament. Such designations often were
(and are) nothing but smoke and mirrors.
 

Grey Havoc

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Creative said:
I've noticed in the drawings that the island appears to be the same size, especially the stacks. Are they keeping the same machinery as the Hyuga's?

Sorry, meant to reply to this ages ago! Yes, the basic machinery is the same.

Here's a crosslink to the Izumo thread.
 

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Moose

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Just General Atomics trying to make a sale. The angled deck as pictured would cause more problems than it solved.
 

Grey Havoc

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Just General Atomics trying to make a sale. The angled deck as pictured would cause more problems than it solved.

Quite possible. Then again the Acquisition, Technology & Logistics Agency is more than a bit of a disaster...
 

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Looks like they've sponsoned out the island: makes sense it will help balance the angled deck extension port-forward.

Notable that we don't have a stern or bow shot, it would likely show how tight a ship like this would be. Ditto for the lack of a notional embarked air group.

And finally, I'm no expert, but I have the feeling that landing on the deck in anything but clement conditions would be challenging.
 

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I was just wondering if they are actually planning to go in another direction altogether, i.e. with a clean sheet design.
 

TomS

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Misdirection exercise, do you think?
Let's reiterate that this is a General Atomics speculation, not a concept developed in Japan. It would be a.massive rebuild, basically new from the hangar deck up.
 

sferrin

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Misdirection exercise, do you think?
Let's reiterate that this is a General Atomics speculation, not a concept developed in Japan. It would be a.massive rebuild, basically new from the hangar deck up.

Like the Midway and Coral Sea. Or Shinano ;) They have been eye-balling the Wasp/America though. IIRC they're interested in F-35Bs not Cs.
 

starviking

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I was just wondering if they are actually planning to go in another direction altogether, i.e. with a clean sheet design.

It would have to work its way through the political process here in Japan - and with the controversy over PM Abe trying to amend the postwar constitution, it would probably be a very slow journey.

In another 10 years... who knows?
 

starviking

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Misdirection exercise, do you think?
Let's reiterate that this is a General Atomics speculation, not a concept developed in Japan. It would be a.massive rebuild, basically new from the hangar deck up.

Like the Midway and Coral Sea. Or Shinano ;) They have been eye-balling the Wasp/America though. IIRC they're interested in F-35Bs not Cs.

Bs indeed.

 

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I've found this short news article about a possible conversion of the Izumo class Helicopter Carriers erm Destroyers..... into full scale Carriers / Light Carriers:
2606874_original-1.jpg


The model shows an extended angled flight deck and two catapults for F-35 Lightning II fighters and E-2 Hawkeye EW aircrafts.
Does anybody know more about this proposal?

The company General Atomics is an exiting American energetic and defence company:
 

lordroel

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I've found this short news article about a possible conversion of the Izumo class Helicopter Carriers erm Destroyers..... into full scale Carriers / Light Carriers
That would be the coolest destroyer i have ever seen.
 

Arjen

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Stretching the 'destroyer' moniker beyond breaking point.
 

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