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Hiraga Yuzuru 1929 Battleship Design by Tzoli Hiraga Yuzuru 1929 Battleship Design by Tzoli
At the time when multiple designs emerged as to what to replace the ageing Kongo class battlecruiser by the terms of WNT, the Admiralty of the Imperial Japanese Navy ordered a set of studies of what can be done on 50-65.000ton displacement and with maximum possible gun calibre and high speed.
Hiraga Yuzuru, prominent naval architect of the time sketched up a battleship reminiscent of her Kongo replacement variants of 1928/29 with similar bridge and funnel arrangement, but with a Nelson style all forward arrangement of its 45cm main guns. To compensate with the added weight forward the secondary armament of 200mm guns in 3 triple turrets focused all aft. A tall towering superstructure would provide the necessary height for the range finding equipment and the heavily angled funnel would put the smoke far away from the command staff and equipment. Heavy AA guns were of the new type 12,7cm one, finishing development at that time. Propulsion system too would be unique as a mixed propulsion of Diesel and Steam Turbines to be used to propel the ship. The hull form is traditional or rather cruiser like with long sleek lines giving it a good length to beam ratio to further help achieving the desired speed.

Though it is not perfect design, the catapult arrangement is awkward as the st catapult which is on top of the 2nd turret is located very high: 10.5m from the deck and 18m from the waterline! Further, giving concern the blast effects of the 45cm cannons on the catapults, though the turrets large and massive size would allow the installation of rotatable catapults rather than fixed ones.

Overall this might be the very first idea and iteration of what eventually lead to the Yamato class battleships of 1936!


The design had the following characteristics:
Dimensions: 289,5 (wl)  x 37,1 x 10,23m 
Displacement: 62.000tons (standard)
Armour: 230mm Deck, 410mm Belt
Engines: 200.000shp, 4 shafts, COSAD - Combined Steam and Diesel
Speed: 59km/h (32knots)
Range: 18.500km at 33km/h (10.000nm at 18knots)
Armaments: 
3x3 45cm/45 Type 90 Cannons,
3x3 20cm/50 Type 9 (9th Year Type, No.1) Guns
6x2 127mm/40 Type 89 DP-AA guns
2-4x Seaplanes (Nakajima E4N)

Official sketch:
www.makettinfo.hu/upload/20081…
Add a Comment:
 
:iconjerzeyboy1995:
jerzeyboy1995 Featured By Owner Apr 8, 2018  Hobbyist General Artist
I see only a steel tub with wood in it. No AA gun mounts except four around the superstructure. Could work if the ship was in a modern era with Phalanx 6x20mm Gatling AA.

Anyway I’m ranting, Love this design but the feeling that comes when you get Hotel after grinding 5 months on this ship is all the better. Now I just need monarch to hurry up and give me my big steel cat AKA Lion. 
Reply
:icontzoli:
Tzoli Featured By Owner Apr 8, 2018  Hobbyist Digital Artist
Then you have bad eyesight:
It has 6 twin 12,7cm DP-AA guns, with excellent firing arcs. Also did you seen what kind of aircraft flown in 1929???
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:iconuglygosling:
uglygosling Featured By Owner Edited Apr 6, 2018
I was wondering what the displacement of this design was, as it had '18"' guns yet the treaty tonnage limit at the time was 35,000 tons. Also the only Hiraga designs circa 1929 I previously knew of adhered to the Washington treaty limits.
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:icontzoli:
Tzoli Featured By Owner Apr 7, 2018  Hobbyist Digital Artist
62.000tons standard as stated.
A proposal does not need to abide to treaties. the USN too designed a battleship with 20" cannons in 1934 as a maximum design with 66.000tons in slow version and 72.500tons in a fast version
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:iconmidway2009:
Midway2009 Featured By Owner Apr 5, 2018  Hobbyist Traditional Artist
Incredible design. :eyepopping:
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:iconangelisgoodwen:
AngelisGoodwen Featured By Owner Apr 5, 2018
I really like that angled design!!!
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:icontzoli:
Tzoli Featured By Owner Apr 5, 2018  Hobbyist Digital Artist
:)
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:iconangelisgoodwen:
AngelisGoodwen Featured By Owner Apr 5, 2018
You're very welcome!!!
Reply
:iconalfredo555:
Alfredo555 Featured By Owner Apr 5, 2018
Great job.
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:icontzoli:
Tzoli Featured By Owner Apr 5, 2018  Hobbyist Digital Artist
thx
Reply
:iconwiedzemin:
Wiedzemin Featured By Owner Apr 4, 2018
I haven't get the idea of the project but still waiting for it's development.
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:iconfrankvc:
FrankvC Featured By Owner Apr 3, 2018
Cant wait for the stats of this ship. I know is something I have seen before but I don’t know where. Is a funny ship with those aft turreted secondaries. Waiting to see more of your awesome work.

PD: Pls tell me when you can do the next batch of my request!! Although if you do an never were of the Kii and #13 I think it would be enough xD 
Reply
:icontzoli:
Tzoli Featured By Owner Apr 3, 2018  Hobbyist Digital Artist
I will tell, but I barely started my current project!
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:iconfrankvc:
FrankvC Featured By Owner Apr 4, 2018
As I said, no need to hurry! Thks a lot 
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:iconalfredo555:
Alfredo555 Featured By Owner Apr 1, 2018

I am struck by the secondary armament (203mm) mounted by the ship. In 99% of the monocalibres battleships, the main secondary caliber did not exceed 155 mm, although there are exceptions. In particular, the "686" design, offered to Brazil. It mounted as secondary armament six guns of 233 mm and fourteen of 152 mm. It should also be noted that some of the preliminary designs of the Viribus Unitis class, as has been well illustrated by the author, mounted 190 mm gunns. Also, there are sources that speak of a secondary battery of twelve 180 mm guns for the UP41 design of Ansaldo for the Soviet navy. I do not know if there are more monocalibres battleships with secondary weapons above 155 mm. Greetings.
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:icontzoli:
Tzoli Featured By Owner Apr 1, 2018  Hobbyist Digital Artist
Russian engineer Vladimir Polievktovich Kostenko's 1936 battleship design:
3x3 406mm, 6x3 180mm, 4x3 130mm, 4x4 37mm on 52.700tons
Soviet Battleship Project 45 of 1950:
1x3,1x2 406mm, 1x4 180mm, 14x2 57mm, 10x4 25mm on 39.250tons

Vickers Design 265 for Argentina, 1907:
4x2 305mm, 4x2 256mm, 24x1 120mm on 19.000tons
Vickers Design 266 for Argentina, 1907:
4x2 305mm, 4x2 256mm, 20x1 120mm on 17.900tons
Vickers Designs 283,87,89,91,93 for Argentina, 1907:
4x2 305mm, 4x2 256mm
Vickers Design 355 for Argentina, 1907:
2x2 343mm, 2x3,2x2 305mm on 21.350tons
Vickers Design 362 for Argentina, 1907:
3x2 343mm, 2x3 305mm, 10x2 152mm on 21.000tons

Armstrong Design 686 for Brazil, 1911:
4x2 406mm, 3x2 239mm, 14x1 152mm on 30.500tons
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:iconalfredo555:
Alfredo555 Featured By Owner Apr 1, 2018
Vickers designs 355 and 362 for Argentina are very strange. Ilustrations?
Very, very interesting. Thanks.
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:icontzoli:
Tzoli Featured By Owner Apr 1, 2018  Hobbyist Digital Artist
Friedman's book not shown drawings for these
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:iconalfredo555:
Alfredo555 Featured By Owner Apr 1, 2018
The 355 design has six towers of 343 and 305 mm, do you know how those towers were arranged? In the same way, the design 362 combines 5 towers of 343 and 305 mm. With what disposition? Is there information about it?
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:icontzoli:
Tzoli Featured By Owner Apr 1, 2018  Hobbyist Digital Artist
In 355 according to Friedman it is possibly the 305mm ones on the centreline with the 343mm ones on wing turrets.
In 362 arrangement was not stated but possibly the 343mm ones are on the centreline and the triple 305mm ones are winged turrets. Either a superfiring pair forward of the 343mm ones or as in the Dreadnought in a Deltoid arrangement.
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:icontheabyssalsamurai:
TheAbyssalSamurai Featured By Owner Apr 1, 2018  Hobbyist Artist
Very interesting plane catapult placements, I will say.

Wonder why they can't just put them at the stern and save or the hassle, while placing some AA mounts on the turrets (or room for them i later modernisations and refits)

Or is there something else that is suppose to go at the stern? Like some sort of structure? Or more main or secondary gun mounts? Or...something that cannot have a catapult placed on top of it.
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:icontzoli:
Tzoli Featured By Owner Apr 1, 2018  Hobbyist Digital Artist
Official design of 1929 the Japanese could not develop a good steam or compressed air catapult for their surface ships so they used gunpowder ones and according to my friend it is easier to store these charges near the main guns munitions than to create another protected storage inside the hull.
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:icontheabyssalsamurai:
TheAbyssalSamurai Featured By Owner Apr 1, 2018  Hobbyist Artist
I would've thought that they would just attact the charges next to the secondary gun stores at the stern but maybe they were that explosive that they needed extra armour to make sure a Hood Explosion doesn't happen.

One things for sure: if I were in charge of modernising them in the late 1930-40s I would have the catapults at the stern and use the space wasted with the rails for the aircraft to mount extra 120mm or 127mm DP mounts. Or if the hull permits maybe a design with 100mm DP mounts for extra modernisation, though I'm not so sure that the hull can support them
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:icontzoli:
Tzoli Featured By Owner Apr 1, 2018  Hobbyist Digital Artist
We are talking 1929 here no experience with Hood, only Jutland.

A possible of 4 Yamato style fully enclosed 127mm turrets are possible on the sides and AA guns in place of the old mounts, aft catapults is a must
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:iconalfredo555:
Alfredo555 Featured By Owner Mar 30, 2018
Why do the ships projected by Hiraga have that strange funnel?


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:icontzoli:
Tzoli Featured By Owner Mar 30, 2018  Hobbyist Digital Artist
This funnel was only apparent on the late 1920's designs. The Kongo replacement designs as well as this 1929 Proto-Yamato were very compact designs minimalism the machinery space to reduce armoured belt and citadel length to a minimum this resulting trunking the boiler uptakes to a single funnel but which would also would be basically part of the superstructure if it went straight upwards or slightly tilted. This would result that in certain winds the smoke and other fumes would engulf the superstructure and bridge making it quite uncomfortable and reduce the effectiveness of the crew and optical equipment like rangefinders, directors and binoculars thus the funnel was angled heavily aft making it as far from the superstructure as possible. Nagato's late 1920's and early 1930's refits featured a similarly curved first funnel. 
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:iconalfredo555:
Alfredo555 Featured By Owner Mar 30, 2018
Ok. Interesting.
Are there more proto yamatos designs or do we have to wait for the preliminary designs specific to the Yamato class?

Thanks for information.
Reply
:icontzoli:
Tzoli Featured By Owner Mar 30, 2018  Hobbyist Digital Artist
There are two more Diesel ones from Ezaki Iwakichi and an 55.000ton again Diesel from Keiji Fukuda
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:iconalfredo555:
Alfredo555 Featured By Owner Mar 29, 2018
9/460mm and 9/203 mm armament?
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:icontzoli:
Tzoli Featured By Owner Mar 30, 2018  Hobbyist Digital Artist
yes
Reply
:iconalfredo555:
Alfredo555 Featured By Owner Mar 29, 2018
Yuzuru Hiraga 1929 battleship design?
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