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Tzoli

Kongo Repalcement Battleship design

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Alpha Tester
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As the 1930 1st London Naval Treaty discussions are about the begin, Japan started designing new warships to replace it's old ships according to the 1922 Washington Naval Treaty articles. Two class were considered to be replaced: Fuso and Kongo each with 2-2 new ships. The ships would have good speed and well armed with new 41cm cannons with a displacement around 30-35.000tons. The overall look would be similar to the Yamato and her preliminaries. Yuzuru Hiraga made a proposals for the Kongo replacement while Kikou Fujimoto for the Fuso replacement. In this thread I post the Kongo replacement design.

 

To made up for the tonnage the WNT allowed, Hiraga proposed multiple variants of weapon layouts and displacements for the IJN:

- 35.000ton variants:

     a.: 3x3 41cm, Speed: 48km/h (26knots)

     b.: 2x4,1x2 41cm, Speed: 48km/h (26knots)

     c.: 3x4 41cm, Speed: 43km/h (23knots)

- 30.000ton variants:

     a.: 2x4 41cm, Speed: 46km/h (25knots)

     b.: 2x3 41cm, Speed: 48km/h (26knots)

     c.: 3x2 41cm, Speed: 48km/h (26knots)

     d.: 2x4,1x2 36cm, Speed: 46km/h (25knots)

     e.: 3x3 36cm, Speed: 48km/h (26knots)

- 25.000ton variants:

     a.: 2x2 41cm, Speed: 46km/h (25knots)

     b.: 3x3 36cm, Speed: 46km/h (25knots)

     c.: 4x2 36cm, Speed: 48km/h (26knots)

- 20.000ton variants:

     a.: 2x3 36cm, Speed: 48km/h (26knots)

     b.: 3x3 30cm, Speed: 46km/h (25knots)

 

Secondary armaments to be consisted of 152mm guns and AA armament of 120mm ones. The AA guns on the superstructure later appeared in some phases on the Yamato preliminaries.

 

The final design however evolved from the 35.000ton B variant but instead of quad turrets it used triple to save weight and used 4 turrets instead of 3. The ship is very compact to further decrease the displacement and armour area. Note the use of both turreted and casemated secondary guns to save weight. On the other hand Fujimoto's proposal was much less compact lack casemate guns and had a more general look on the superstructure shape.

Available data on the final design from 1928-29:

 

Dimensions: 232m x 32m x 9m
Displacement: 35.000tons standard, 39.200tons full load
Engine Power: 160.000shp 4 shafts
Maximum Speed: 49km/h (26,5knots)

Armour: Unknwon
Armaments:
2x3,2,2 410mm Cannons

4x2,8x1 152mm Guns in turrets and casemates
4x2 120mm AA Guns
2x1 610mm Torpedo tubes (probably submerged)

2x seaplanes

 

Hiraga's proposal:

kongo_replacement_battleships_by_leovict

Note the high angle secondary guns in the casemates as well!

zXv1Z2s.jpg

kongo_replacement_model_by_leovictor-d38

20470501-004_001.jpg

 

Fujimoto's proposal:

fuso_replacement_design_by_leovictor-d38

 

Comparison:

008.jpg~original

 

Note: It is possible that both Fujimoto's and Hiraga's designs are for the Kongo Replacement warships and not for Kongo and Fuso.

Edited by Tzoli
  • Cool 2

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Players
30 posts

none of the sources i have seen have the casement or turret guns as high angle, the only A/A being the 4 x 2 x 127mm on the tower!   the design shown has the great advantage of a VERY short  citadel!

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Alpha Tester
362 posts
357 battles

none of the sources i have seen have the casement or turret guns as high angle, the only A/A being the 4 x 2 x 127mm on the tower!   the design shown has the great advantage of a VERY short  citadel!

 

Those are 12cm ones not 12.7cm. Typical 1920's early 30's era IJN AA weapon

http://www.navweaps.com/Weapons/WNJAP_47-45_10ns.htm

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[PRAVD]
Weekend Tester
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As the 1930 1st London Naval Treaty discussions are about the begin, Japan started designing new warships to replace it's old ships according to the 1922 Washington Naval Treaty articles. Two class were considered to be replaced: Fuso and Kongo each with 2-2 new ships. The ships would have good speed and well armed with new 41cm cannons with a displacement around 30-35.000tons. The overall look would be similar to the Yamato and her preliminaries. Yuzuru Hiraga made a proposals for the Kongo replacement while Kikou Fujimoto for the Fuso replacement. In this thread I post the Kongo replacement design.

 

To made up for the tonnage the WNT allowed, Hiraga proposed multiple variants of weapon layouts and displacements for the IJN:

- 35.000ton variants:

     a.: 3x3 41cm, Speed: 48km/h (26knots)

     b.: 2x4,1x2 41cm, Speed: 48km/h (26knots)

     c.: 3x4 41cm, Speed: 43km/h (23knots)

- 30.000ton variants:

     a.: 2x4 41cm, Speed: 46km/h (25knots)

     b.: 2x3 41cm, Speed: 48km/h (26knots)

     c.: 3x2 41cm, Speed: 48km/h (26knots)

     d.: 2x4,1x2 36cm, Speed: 46km/h (25knots)

     e.: 3x3 36cm, Speed: 48km/h (26knots)

- 25.000ton variants:

     a.: 2x2 41cm, Speed: 46km/h (25knots)

     b.: 3x3 36cm, Speed: 46km/h (25knots)

     c.: 4x2 36cm, Speed: 48km/h (26knots)

- 20.000ton variants:

     a.: 2x3 36cm, Speed: 48km/h (26knots)

     b.: 3x3 30cm, Speed: 46km/h (25knots)

 

Secondary armaments to be consisted of 152mm guns and AA armament of 120mm ones. The AA guns on the superstructure later appeared in some phases on the Yamato preliminaries.

 

The final design however evolved from the 35.000ton B variant but instead of quad turrets it used triple to save weight and used 4 turrets instead of 3. The ship is very compact to further decrease the displacement and armour area. Note the use of both turreted and casemated secondary guns to save weight. On the other hand Fujimoto's proposal was much less compact lack casemate guns and had a more general look on the superstructure shape.

Available data on the final design from 1928-29:

 

Dimensions: 232m x 32m x 9m
Displacement: 35.000tons standard, 39.200tons full load
Engine Power: 160.000shp 4 shafts
Maximum Speed: 49km/h (26,5knots)

Armour: Unknwon
Armaments:
2x3,2,2 410mm Cannons

4x2,8x1 152mm Guns in turrets and casemates
4x2 120mm AA Guns
2x1 610mm Torpedo tubes (probably submerged)

2x seaplanes

kongo_replacement_battleships_by_leovict

Note the high angle secondary guns in the casemates as well!

zXv1Z2s.jpg

kongo_replacement_model_by_leovictor-d38

 

Note: It is possible that both Fujimoto's and Hiraga's designs are for the Kongo Replacement warships and not for Kongo and Fuso.

 

Yet another grand interesting thread about a ship that was about to become replaced.

Keep up the great work, i must say! And thank you yet again. :3

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Alpha Tester
362 posts
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Added a few more photos and drawings

  • Cool 1

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[JUNK]
[JUNK]
Beta Tester
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This thread deserves more attention tbh

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Alpha Tester
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Alpha Tester
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Not sure if anyone cares for this on this forum, but here are the Kongo Replacement designs.

First the 20.000ton versions:

Version A:

https://www.deviantart.com/tzoli/art/Kongo-Replacement-Design-20K-Variant-A-805798475

 

ddbr22z-edca474d-7337-4890-8d8c-8582dac4

Version B:

https://www.deviantart.com/tzoli/art/Kongo-Replacement-Design-20K-Variant-B-806186617

 

ddbzdkp-dc4b1a3b-2fc2-48ff-a12e-d81d43c5

  • Cool 3

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Beta Tester
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2 hours ago, Tzoli said:

Not sure if anyone cares for this on this forum, but here are the Kongo Replacement designs.

 

Well, most likely, those who do already follow your deviantart closely =3

But attempting to spread it is never a bad thing.

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Alpha Tester
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9 hours ago, ColonelPete said:

I like the designs.

 

Would be nice if you could write a bit about them.

Check the DA links there is all the info I could find. And don't use mobile phone for it.

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Alpha Tester
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[CATS]
Players
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The lettering of the variants is different to what you posted in the past.

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Alpha Tester
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Yes that was 5 years ago.

If you check the Japanese documents there are no designations so I have free reign however I want to designate them.

http://gazo.dl.itc.u-tokyo.ac.jp/hiraga2/show/id/20680101#?c=0&m=0&s=0&cv=0&xywh=1103%2C-688%2C1777%2C3085&r=270

This time I went with increasing calibre.

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Alpha Tester
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Alpha Tester
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