It does, however, follow the Japanese trend toward gigantism - no doubt about that.
Well, if it makes you feel you any better, it was slightly lighter before today... about 500 tons lighter...
I was actually thinking of trying to change it so the light tonnage would end up as 22,222 tons, but decided not to do that and just be satisfied with the 0.666 BC...
Originally (about 2 years ago) the idea was a single vessel to support both Hiyo carriers at once and which was to be laid down in 1943. In the end, I scrapped the idea, but today I changed my mind and decided to build it anyway and add the Nurikabe carriers as well as the Yamato and Oshima battleships to the list of ships to handle and added a second vessel to the class.
... and I even added a swimming pool to the design.
Hiyo class carrier
Ammunition: 498 tons
Max fuel: 8287 tons
Avgas: 3600 for 120 planes
Stores: 1325 tons
Nurikabe class carrier
Ammunition: 1113 tons
Max fuel: 8546 tons
Avgas: 3870 for 129 planes
Stores: 1476 tons
Yamato class battleship
Ammunition: 2599 tons + ?
Max fuel: 12705 tons
Avgas: 210 tons
Stores: 2145 tons
Oshima class battleship
Ammunition: 4969 tons
Max fuel: 12630 tons
Avgas: 60 tons
Stores: 2704 tons
Hiyo Maru cargo
Ammunition: 5000 tons
Fuel: 17747 tons
Avgas: 8000 tons
Stores: 3000 tons
The things I was looking at with the Zafura class vessels were:
- Ammunition enough to fully resupply one Oshima class battleship.
- Fuel enough to completely fill up two Nurikabe class carriers.
- Not sure about the avgas, so I just assumed 30 tons per plane. Should be able to completely refil the avgas supply of two Nurikabe class carriers.
- Stores enough to completely restock two Nurikabe class carriers.
- Roughly similar range as the above ships.
- A speed close to the speed of the above ships.
With the amount needed for fuel, ammunition, stores as well as the machinery to be able to get to almost 29 knots, that will result in a pretty big vessel. I could have changed the requirements for the ship and gone for a bunch of smaller vessels but I thought that a bigger vessel would be a bit more interesting.
I'm not clear on why you're quoting a different full load displacement than the sim says for the Atomic Maru class.
I consider all cargo that the ship can carry to be present at normal displacement. Therefore the only weight added to the ship to get from normal displacement to full displacement should be the ship's
own fuel for the 15000nm/15kts range (or 36000nm/10kts for the Mara Maru class) and
not that of the 110300nm/15kts (or 141390nm/10kts for the Mara Maru class).
... and the reason I do that is that for 89266 tons, the draught at maximum displacement would be about 53 feet. When you look at the sim and look at the height of the sides, you'll see that that is 57.5 feet. Actually back when I originally simmed it, the draught at maximum displacement was
greater than the height of the sides... so I guess that when fully loaded that particular design would have sunk no matter what SS says...
There's certain no doubt in my mind as to why all the Japanese cruisers are in the 5,000 t range these days...
Actually they are not cruisers but detroyers...