Unbuilt Japanese Aircraft Carriers

[Tzoli]

Official wind tunnel test model of the G-8:
https://ameblo.jp/vesselturedure/entry-12609060596.html

 

[Tzoli]

G-6 and G-8 oldest drawings:

Armaments based on the Japanese page:
G-6:
3x2 20cm guns
6x2 12,7cm DP-AA Guns (drawing shows 4x2)
70x aircrafts

G-8:
1x2,1x3 15,5cm guns,
6x2 12,7cm DP-AA guns, (Drawign shows 4x2, Model shows 8x2)
14x2 25mm AA Guns.
72x aircrafts

 

[Tzoli]

I'm working on the Nagato Carrier Conversion proposal and I could put 52 aircraft in her Hanger (40 + 4 spares of each type) though it would be quite crowded but if Shinano type deck parking was taken into account the 54 aircraft capacity could be easily reached. I've yet to find Japanese sources about this conversion.
Here is the Work in Progress drawing:

 

[alejandrogrossi]

I have these images. The color image as usual I don't remember where I found it. The blueprint was get in the older Warshipprojects page.

Julio
The frist image is most interest. it´s supose a angled fligh deck. I enjoy if you have more images about it

 

[alexi]

I have these images. The color image as usual I don't remember where I found it. The blueprint was get in the older Warshipprojects page.

Julio
The frist image is most interest. it´s supose a angled fligh deck. I enjoy if you have more images about it

Its artist own bias/interpretations since Japanese never adopt angled flight deck nor side elevator, i see quite amount like angled flight deck Taihou, Kaga, Akagi on Japanese websites.

 

[Tzoli]

I have these images. The color image as usual I don't remember where I found it. The blueprint was get in the older Warshipprojects page.

Julio
The frist image is most interest. it´s supose a angled fligh deck. I enjoy if you have more images about it

Artist impression, hypothetical (not real) design/drawing
Here is the original:
https://www.deviantart.com/hylajaponica/art/IJN-Ise-Aircraft-Battleship-723742275https://www.pixiv.net/en/artworks/66647940https://www.pixiv.net/en/artworks/66647822

 

[alejandrogrossi]

I have these images. The color image as usual I don't remember where I found it. The blueprint was get in the older Warshipprojects page.

Julio
The frist image is most interest. it´s supose a angled fligh deck. I enjoy if you have more images about it

Artist impression, hypothetical (not real) design/drawing
Here is the original:
https://www.deviantart.com/hylajaponica/art/IJN-Ise-Aircraft-Battleship-723742275https://www.pixiv.net/en/artworks/66647940https://www.pixiv.net/en/artworks/66647822

Thanks.
Nice never rebilt hybrid BB

 

[Tzoli]

For the Nagato using the 1st and 4th barbettes as Elevator pits I've created one main hanger area with the centre somewhat separated by the funnel uptakes and there are some space around the elevators for miscellaneous storage of wings, fuselage or for small vehicles.
But If I use the 2nd and 3rd Barbettes as Elevator pits, being the hull wider there I reduce the main hanger length considerably but could add 2 small hanger areas at the ends in front and aft of the elevators as well as sightly smaller sized hangers on the same space below them.

 

[airman]

I'm working on the Nagato Carrier Conversion proposal and I could put 52 aircraft in her Hanger (40 + 4 spares of each type) though it would be quite crowded but if Shinano type deck parking was taken into account the 54 aircraft capacity could be easily reached. I've yet to find Japanese sources about this conversion.
Here is the Work in Progress drawing:

I remember that this type of conversion of Carrier was proposed for many battleship classes

 

[Tzoli]

I'm working on the Nagato Carrier Conversion proposal and I could put 52 aircraft in her Hanger (40 + 4 spares of each type) though it would be quite crowded but if Shinano type deck parking was taken into account the 54 aircraft capacity could be easily reached. I've yet to find Japanese sources about this conversion.
Here is the Work in Progress drawing:

I remember that this type of conversion of Carrier was proposed for many battleship classes

Yes for the 4 Kongos, 2 Fusos, 2 Ises and the 2 Nagatos
together with
the 4 Myokos, 4 Takaos, 3 Mogamis and 2 Tones.

 

[Pioneer]

It's seemingly reminiscent of the Kiev-class in its layout and firepower of the time...

Regards
Pioneer

 

[alexi]

Tzoli, Hiraga archive mentioned that Akagi and Kaga have proposal to equip them with dual 14cm casemate gun in place for 20cm (up to 24! of them), do you plan to draw these variants at some point?

 

[Tzoli]

Tzoli, Hiraga archive mentioned that Akagi and Kaga have proposal to equip them with dual 14cm casemate gun in place for 20cm (up to 24! of them), do you plan to draw these variants at some point?

Where did you read that?

 

[HAzy]

Yes for the 4 Kongos, 2 Fusos, 2 Ises and the 2 Nagatos
together with
the 4 Myokos, 4 Takaos, 3 Mogamis and 2 Tones.

I'm interested to know about ship conversion except that... may I know where you read it?? thank you...

 

[alexi]

Where did you read that?

https://imgur.com/Ks7EeXl

 

[Tzoli]

Yes for the 4 Kongos, 2 Fusos, 2 Ises and the 2 Nagatos
together with
the 4 Myokos, 4 Takaos, 3 Mogamis and 2 Tones.

I'm interested to know about ship conversion except that... may I know where you read it?? thank you...

Eric Lacroix - Japanese Cruisers of the Pacific War. Relevant pages attached

 

[Tzoli]

Where did you read that?

https://imgur.com/Ks7EeXl

No no no. That is Aircraft carrier B aka a preliminary for Kaga. Actually variant C. I have the Hiraga sketch drawings as well. Will post later. 12 per side 6 forward 6 aft if I remember.

 

[alexi]

Oh preliminary, not proposal, got it and i figured the secondaries placement but thanks.

 

[Tzoli]

Oh preliminary, not proposal, got it and i figured the secondaries placement but thanks.

Here:

https://imgur.com/NGS1aeQ

View: https://i.imgur.com/NGS1aeQ.jpg

 

[Tzoli]

The other two known preliminary variants of carrier Kaga:

https://imgur.com/Vyg9bFd

View: https://i.imgur.com/Vyg9bFd.jpg

https://imgur.com/fZ77oei

View: https://i.imgur.com/fZ77oei.jpg

 

[Tzoli]

Here is the finished Nagato in Carrier form. I'm not sure which deck variant I should choose.
The common wood plank, the armoured looking metal or the Shinano like dark Linoleum one:
https://i.im.ge/2021/11/02/o6GDb1.pnghttps://i.im.ge/2021/11/02/o6GIBf.pnghttps://i.im.ge/2021/11/02/o6G7hP.png

 

[alejandrogrossi]

Here is the finished Nagato in Carrier form. I'm not sure which deck variant I should choose.
The common wood plank, the armoured looking metal or the Shinano like dark Linoleum one:
https://i.im.ge/2021/11/02/o6GDb1.pnghttps://i.im.ge/2021/11/02/o6GIBf.pnghttps://i.im.ge/2021/11/02/o6G7hP.png

Nice rebuilt
Hiyo class style, but bigger

 

[Tzoli]

Here is the finished Nagato in Carrier form. I'm not sure which deck variant I should choose.
The common wood plank, the armoured looking metal or the Shinano like dark Linoleum one:
https://i.im.ge/2021/11/02/o6GDb1.pnghttps://i.im.ge/2021/11/02/o6GIBf.pnghttps://i.im.ge/2021/11/02/o6G7hP.png

Nice rebuilt
Hiyo class style, but bigger

Well I indeed started with the bridge of the Junyo, but as the drawings I had were inconsistent with the deck and platform layouts of it so I eventually chosen Shinano's bridge which I've already drawn and reduced it's size accordingly, but taken some ideas from Junyo eg the two masts for example

 

[lancer21]

Is there any more information regarding Kongo class conversion to CV? I know the flight deck was supposed to be 220m long and they were supposed to carry 54 aircraft, not clear if operational or including spares.

The reason i'm asking is because i was thinking what if they would have converted Hiei into a CV before the war instead of rebuilding it as a fast BB, and would like to know if it would be able to carry a standard fleet CV airgroup of 18 A6M, 18 D3A and 18 B5N (similar to say Soryu).

 

[Tzoli]

In 1942/44 would look like my Nagato CV drawing but on a longer hull and more prominent sponsoons as the hull was thinner.
Before ww2 something like a one deck high Akagi or Kaga as modernized but likely with Shokaku style bridge

 

[lancer21]

What you think about how many aircraft would a Kongo CV carry, would 54 aircraft fit like in your Nagato CV conversion proposal? And how many aircraft you think could they add if adopting the Shinano type deck park for both the Nagato CV and Kongo CV? Thank you.

 

[Tzoli]

Around 45-60 planes depending on storage (Hanger only or Hanger+Flight Deck)

 

[Tzoli]

Oyodo design in her early cruiser-carrier form:
(Perfect Guide, The Aircraft Carriers of the Imperial Japanese Navy & Army)

 

[Jemiba]

That carrier based version of the Kawanishi E 15K Shiun is new to me. Are there more data about it ?

 

[Tzoli]

I did not know such project existed. A land/carrier based Shiun

 

[lancer21]

Great find, thank you Tzoli.

What are the specs of Oyodo in that configuration?

That land-based Shiun is nifty, and imo again goes to show the design resource waste in Japan in those years, to me it looks like a perfectly acceptable torpedo-bomber (carrying a torpedo instead of the big central float).

 

[Tzoli]

Design Number: W-105 from 1938
Dimensions: 180 (pp) x 189,7 (wl) x 192,1 (oa) x 25 x 5,95 meters
Displacement: 16.600tons (standard)
Engines: 110.000shp Kampon Steam Turbines, 4 shafts
Range: 19.600km
Speed: 63km/h (34knots)
Armour: 50mm Deck, 50mm Belt
Armaments:
2x3 15,2cm/60 Type 90 Guns,
4x2 10cm/65 Type 98 AA Guns,
6x2 25mm/60 Type 96 AA Guns
20x Aircraft, stated to be E15K Shiun

 

[airman]

That carrier based version of the Kawanishi E 15K Shiun is new to me. Are there more data about it ?

Yes , with ocr tools i have copied and pasted on Google Translate : it was proposed landed version of Shiun for Oyodo like cruiser-carrier.

 

[Mera A Firewing]

Official wind tunnel test model of the G-8:
https://ameblo.jp/vesselturedure/entry-12609060596.html

Definitely would love to see this on deviantart.

 

[Mera A Firewing]

G-6 and G-8 oldest drawings:

Armaments based on the Japanese page:
G-6:
3x2 20cm guns
6x2 12,7cm DP-AA Guns (drawing shows 4x2)
70x aircrafts

G-8:
1x2,1x3 15,5cm guns,
6x2 12,7cm DP-AA guns, (Drawign shows 4x2, Model shows 8x2)
14x2 25mm AA Guns.
72x aircrafts

It be very cool if these were drawn, Japan really likes making unique aircraft carrier designs.

 

[airman]

Unknown cruiser-carrier design - 1926 (10.000tons) (drawing available)

any details of this design ?

 

[Tzoli]

any details of this design ?

Here:
https://www.secretprojects.co.uk/threads/interesting-japanese-cruiser-carrier-hybrid.25095/

 

[airman]

I did not know such project existed. A land/carrier based Shiun

Could be only a proposed land version during development of floatplane version: nothing more.

 

[Julio Garay Terrazas]

I found this japanese web page and I'm just starting to explore it.
https://japanese-warship.com/

https://japanese-warship.com/carrier/carrier/

Have a very good "cyberbibliography:

https://japanese-warship.com/reference/

 

[MakPengn]

I believe I've found a tidbit of information regarding the G-5 design. It was in a doujinshi about Japanese Light Aircraft Carriers, written by an author who styles himself as 'Reppuu Kai'. Though I'm unsure if this is truthful, this same author was mentioned in the post-Taiho fleet carrier thread, so I decided it was worth posting.

Link to the booklet, found on an auction site.



Here's my attempt at upscaling the image, to improve readability:



I can't speak Japanese, but it seems like it was a 1928-31 proposal for a 9,000-12,000 ton light carrier, with an aircraft complement of 55 to 66 aircraft. Anti-aircraft weaponry seems to be 6x2 127/40 DP guns, and there seems to be a hybrid cruiser derivative with 2x3 155mm, which seems to tie the design with the subsequent G-6. If anyone is able to translate this better, please correct any mistakes I've made.