Why is the Izumo so fat?

[Royeaux]

Why is the Izumo so large?  Especially since it is so poorly armored??  It appears to be almost as wide as the Yamato, but the Yamato was built that size so that it could house that massive 18" guns, but what was Izumo's excuse, it's only got 16" guns?  Did the Kancolle's fan made character of Izumo have an undying passion for donuts or something?  The Amagi has MORE gun, and still maintains a much thinner profile.  

[_Zesty_]

Because the Izumo is a sumo.

 

[J30_Reinhardt]

It has to give birth to the yamato...

[Mesrith]

Genetics.

[Guest]

Think of it like a Deformed Yamato who's turrets and guns never fully matured or formed into 18.1 inch guns. 

[Seraphil]

Why is the Izumo so large?  Especially since it is so poorly armored??  It appears to be almost as wide as the Yamato, but the Yamato was built that size so that it could house that massive 18" guns, but what was Izumo's excuse, it's only got 16" guns?  Did the Kancolle's fan made character of Izumo have an undying passion for donuts or something?  The Amagi has MORE gun, and still maintains a much thinner profile.  

 

The A-140-J2 was a design proposal that led to the Yamato.  A Yamato prototype.  Izumo was a name WG assigned it since it would be consistent with other Japanese battleships.  Izumo mounts triple-gun turrets which are going to be larger than Nagato's doubles, and also has secondary batteries of 155mm guns(taken from the Mogami-class cruisers,) considerably better armor than Nagato, and the all-forward gun placement meant the ship citadel could be concentrated down for armor placement, so the ship would end up with a shorter keel compared to the beam width.  Amagi is a battlecruiser, has worse armor than Izumo does, only double-gun turrets, and no giant secondaries like the 155mm turrets.  Space is also needed for the seaplane deck in the rear.

 

How the hell would Kancolle be involved when the ship didn't even exist.

[USMarine]

Well....it WAS technically a Yamato prototype.

[Royeaux]

 

The A-140-J2 was a design proposal that led to the Yamato.  A Yamato prototype.  Izumo was a name WG assigned it since it would be consistent with other Japanese battleships.  Izumo mounts triple-gun turrets which are going to be larger than Nagato's doubles, and also has secondary batteries of 155mm guns(taken from the Mogami-class cruisers,) considerably better armor than Nagato, and the all-forward gun placement meant the ship citadel could be concentrated down for armor placement, so the ship would end up with a shorter keel compared to the beam width.  Amagi is a battlecruiser, has worse armor than Izumo does, only double-gun turrets, and no giant secondaries like the 155mm turrets.

 

How the hell would Kancolle be involved when the ship didn't even exist.

 

Just being a Yamato prototype isn't an answer, the Yamato was that large because of it's giant 18.1" guns, the ship had to be that big to withstand the stress of firing those monsters off.  The Izumo only had the 16" guns, there was no need to make the ship that drastically wide to accommodate an extra barrel.  I understand it's a paper ship, but why did the designer make the paper ship so wide?  And I've seen so many players complain about the weak armor and the easily destroyed turrets that it begs the question why the ship is so big if its got so little armor and tiny guns, it just becomes a big easy target!  The Iowa, South Dakota, and North Carolina ships were certainly not this fat, they could fit through the panama canal, and they had triple 16" guns, and the Iowa had armor that could resist its own guns!

 

That why I said fan-made Kancolle character.  They are loads of fan-made US ship Kancolle characters.

[4wilds]

Because it ate all the Seamen?

 

And she's not fat, it's her camo that makes her look that way.

[crzyhawk]

Why is the Izumo so large?  Especially since it is so poorly armored??  It appears to be almost as wide as the Yamato, but the Yamato was built that size so that it could house that massive 18" guns, but what was Izumo's excuse, it's only got 16" guns?  Did the Kancolle's fan made character of Izumo have an undying passion for donuts or something?  The Amagi has MORE gun, and still maintains a much thinner profile.  

 

Because some IJN players like big butts and they cannot lie.

[Royeaux]

Because it ate all the Seamen?

 

And she's not fat, it's her camo that makes her look that way.

 

No, it's most certainly the vast empty wooden deck that makes her look fat.  Empty, unused space the main deck tends to make any ship look big.  The Kongo is slimming because only half of the bow is wooden deck, the rest is metal.

[Mesrith]

...and the Iowa had armor that could resist its own guns!

 

No, it didn't.  It was resistant to the 16/45, but not the 16/50.

[Cruiser_Maya]

It's a bad design. Simple as that. 

[Takeda992]

 

Because some IJN players like big butts and they cannot lie.

 

Everyone likes big butts. Have you ever seen someone who likes flat butts?

 

 

Anyway, if you think Izumo is strange, compare Myogi to Kongou. Myogi is wider in the aft section than Kongou.

[Seraphil]

 

Just being a Yamato prototype isn't an answer, the Yamato was that large because of it's giant 18.1" guns, the ship had to be that big to withstand the stress of firing those monsters off.  The Izumo only had the 16" guns, there was no need to make the ship that drastically wide to accommodate an extra barrel.  I understand it's a paper ship, but why did the designer make the paper ship so wide?  And I've seen so many players complain about the weak armor and the easily destroyed turrets that it begs the question why the ship is so big if its got so little armor and tiny guns, it just becomes a big easy target!  The Iowa, South Dakota, and North Carolina ships were certainly not this fat, they could fit through the panama canal, and they had triple 16" guns, and the Iowa had armor that could resist its own guns!

 

That why I said fan-made Kancolle character.  They are loads of fan-made US ship Kancolle characters.

 

Fine, since you can't even be bothered to read my one whole paragraph.  Search for the A-140 Project and do your own research.  They're ALL wide, some wider than than the A-140-J2 we have in-game(A-140-A is 40 meters!)

[Codyak]

That's ignorant, she's just big-boned.

[Royeaux]

 

Fine, since you can't even be bothered to read my one whole paragraph.  Search for the A-140 Project and do your own research.  They're ALL wide, some wider than than the A-140-J2 we have in-game(A-140-A is 40 meters!)

I'm not sure that was a complete answer my question.  Unless that's really your answer, their wide because their wide.   WHY are they so wide??  I really don't think a triple 16" turret would make it so wide, the Iowa didn't have to be.  Just because they designed it that way, doesn't tell the reasoning behind it. Did they think having a bigger hanger was worth making the ship slower and much easier to hit?  The front of her turrets can't withstand 16" guns either, and that's some of the thickest armor on the ship.

 

 

 

The Izumo in-game seems to be a complete failure of design.

“Check out this design of a Super-Battleship I just made, it’ll be huge and have a large plane hanger in the back so it can launch extra planes and it’ll have an all forward gun design like HMS Nelson!

“Will those planes be useful in a battleship duel?” “Mildly”

“Will that extra size make her faster or cheaper to build or harder to hit with shellfire?” “Heck no”

“Will the guns have a large enough caliber to penetrate that American Battleship armor that can resist 16” shells?” “No, that’d be unsporting!”

“Will she be able fire all her guns while safely angled against shellfire?” “No, we put the back turret on backwards so she’ll have to expose a fair amount of her broadside to fire.”

“At least the turret faces of the Izumo will be armored against 16” inch shells, the caliber we know our enemy will use?” “Goodness no, a 16” shell will sail straight through and kill everyone inside!”

"Will she have plenty of turrets then?" "No, she's got fewer guns then the planned Amagi."

“Her size must mean she’s got the armor to resist 16” shells right?” “What?  No that’d be expensive!”

“What about the citadel, the all forward gun design means you’ve concentrated loads of armor around the smaller citadel to make it impenetrable right?  “Couldn’t be bothered to be honest.”

 

“Your fired…”

[TenguBlade]

Why is the Izumo so large?  Especially since it is so poorly armored??  It appears to be almost as wide as the Yamato, but the Yamato was built that size so that it could house that massive 18" guns, but what was Izumo's excuse, it's only got 16" guns?  Did the Kancolle's fan made character of Izumo have an undying passion for donuts or something?  The Amagi has MORE gun, and still maintains a much thinner profile.  

Hydrodynamics.  The shape of Izumo's hull is similar to Yamato's, which was designed to reduce drag.  Consider this: Amagi requires 131,000SHP to make 30 knots (the ship's design displacement was about 47,000 tons fully loaded) while Yamato needs 150,000SHP to make 27 (while displacing 73,000 tons at full load).

 

As for the armor, I've heard it said that Izumo's internal armor belts had a design flaw that made her vulnerable to penetrations from above.  Can't remember where, but it seems that way; almost every citadel I've gotten on her has been with plunging fire.

[Royeaux]

Hydrodynamics.  The shape of Izumo's hull is similar to Yamato's, which was designed to reduce drag.  Consider this: Amagi requires 131,000SHP to make 30 knots (the ship's design displacement was about 47,000 tons fully loaded) while Yamato needs 150,000SHP to make 27 (while displacing 73,000 tons at full load).

 

There's my answer.

[TenguBlade]

There's my answer.

Happy to help.

 

As for the people who were trying to have a laugh out of this, congrats on your optimism, but there are places where it detracts from the purpose of a thread.

[Eisennagel]

 

 

The newer battleships have a reverse teardrop shaped hull.

 

Its a splendid discovery in hydrodynamics, best expressed in nature and submarine design.

 

Conventionally, we tend to think a thinner design should be the most hydrodynamically efficient because it cuts through water and has the least frontal profile.  So the faster ships tend to have a high length to width ratio.  And for a while, that is what we believe.

 

Then it is discovered the best way to achieve lower drag isn't in sharp narrow profile, but to reduce total surface area in relation to volume and weight.  And that leads to fatter designs, designs that are more similar to a dolphin or a whale rather than a knife.  That also lead to a revolution in submarine design like the USS Albacore from WW2 designs.  Ship builders already know something about that, hence you can see the difference in hull design from those made before WW2 to those before WW2.