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US CA Arcadia Bay - AU ship
http://67.205.157.234/forums/viewtopic.php?f=18&t=6956		 Page 1 of 6
Author:  Shigure [ May 25th, 2016, 6:04 pm ]
Post subject:  US CA Arcadia Bay - AU ship
[ img ]
  • Arcadia Bay
  • Bandon
  • La Grande
  • Prineville
  • Roseburg
  • Ashton
  • Brookings
USS Arcadia Bay, United States heavy cruiser laid down 1943

USS Arcadia Bay, United States heavy cruiser laid down 1943

Displacement:
10 680 t light; 11 075 t standard; 12 268 t normal; 13 223 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(627,54 ft / 618,77 ft) x 68,90 ft (Bulges 72,18 ft) x (21,65 / 22,89 ft)
(191,28 m / 188,60 m) x 21,00 m (Bulges 22,00 m) x (6,60 / 6,98 m)

Armament:
12 - 5,98" / 152 mm 38,0 cal guns - 101,70lbs / 46,13kg shells, 100 per gun
Breech loading guns in turret on barbette mounts, 1943 Model
2 x 2 row twin mounts on centreline, aft deck aft
1 raised mount aft - superfiring
2 x 2 row twin mounts on centreline, forward deck forward
1 raised mount - superfiring
12 - 5,00" / 127 mm 38,0 cal guns - 59,33lbs / 26,91kg shells, 200 per gun
Dual purpose guns in turret on barbette mounts, 1943 Model
2 x Twin mounts on sides, aft deck forward
2 raised mounts
4 x Twin mounts on sides, forward deck aft
4 raised mounts
16 - 1,57" / 40,0 mm 50,0 cal guns - 2,07lbs / 0,94kg shells, 150 per gun
Anti-air guns in deck mounts, 1943 Model
2 x Twin mounts on sides, aft deck forward
2 raised mounts - superfiring
6 x Twin mounts on sides, forward deck aft
2 raised mounts - superfiring
Weight of broadside 1 965 lbs / 891 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5,00" / 127 mm 279,86 ft / 85,30 m 12,80 ft / 3,90 m
Ends: 2,99" / 76 mm 164,04 ft / 50,00 m 12,80 ft / 3,90 m
174,87 ft / 53,30 m Unarmoured ends
Main Belt covers 70% of normal length
Main belt does not fully cover magazines and engineering spaces

- Torpedo Bulkhead - Strengthened structural bulkheads:
2,99" / 76 mm 492,13 ft / 150,00 m 16,40 ft / 5,00 m
Beam between torpedo bulkheads 62,34 ft / 19,00 m

- Hull Bulges:
5,00" / 127 mm 175,52 ft / 53,50 m 9,84 ft / 3,00 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 7,99" / 203 mm 6,00" / 152 mm 7,00" / 178 mm
2nd: 5,00" / 127 mm 3,00" / 76 mm 4,00" / 102 mm
3rd: 1,42" / 36 mm - -

- Armoured deck - multiple decks:
For and Aft decks: 1,42" / 36 mm
Forecastle: 1,42" / 36 mm Quarter deck: 1,42" / 36 mm

- Conning towers: Forward 6,00" / 152 mm, Aft 5,00" / 127 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 93 457 shp / 69 719 Kw = 32,00 kts
Range 8 000nm at 16,00 kts
Bunker at max displacement = 2 148 tons

Complement:
582 - 757

Cost:
£5,686 million / $22,743 million

Distribution of weights at normal displacement:
Armament: 450 tons, 3,7%
- Guns: 450 tons, 3,7%
Armour: 3 787 tons, 30,9%
- Belts: 1 026 tons, 8,4%
- Torpedo bulkhead: 894 tons, 7,3%
- Bulges: 320 tons, 2,1%
- Armament: 708 tons, 5,8%
- Armour Deck: 714 tons, 5,8%
- Conning Towers: 126 tons, 1,0%
Machinery: 2 414 tons, 19,7%
Hull, fittings & equipment: 4 029 tons, 32,8%
Fuel, ammunition & stores: 1 588 tons, 12,9%
Miscellaneous weights: 0 tons, 0,0%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
16 292 lbs / 7 390 Kg = 152,0 x 6,0 " / 152 mm shells or 3,3 torpedoes
Stability (Unstable if below 1.00): 1,00
Metacentric height 2,9 ft / 0,9 m
Roll period: 17,9 seconds
Steadiness - As gun platform (Average = 50 %): 59 %
- Recoil effect (Restricted arc if above 1.00): 0,42
Seaboat quality (Average = 1.00): 0,88

Hull form characteristics:
Hull has raised forecastle, rise aft of midbreak,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0,444 / 0,453
Length to Beam Ratio: 8,57 : 1
'Natural speed' for length: 24,88 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 67
Bow angle (Positive = bow angles forward): 20,00 degrees
Stern overhang: 0,00 ft / 0,00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 23,40%, 24,11 ft / 7,35 m, 16,40 ft / 5,00 m
- Forward deck: 0,00%, 0,00 ft / 0,00 m, 0,00 ft / 0,00 m
- Aft deck: 46,60%, 16,40 ft / 5,00 m, 16,40 ft / 5,00 m
- Quarter deck: 30,00%, 16,40 ft / 5,00 m, 16,40 ft / 5,00 m
- Average freeboard: 17,13 ft / 5,22 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 84,6%
- Above water (accommodation/working, high = better): 145,3%
Waterplane Area: 27 062 Square feet or 2 514 Square metres
Displacement factor (Displacement / loading): 121%
Structure weight / hull surface area: 128 lbs/sq ft or 624 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,99
- Longitudinal: 1,05
- Overall: 1,00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather
Report by Keiser

__________

Hello everyone! I registered this morning and couldn't wait to design my first custom US cruiser! I finished this in about 5 hours after signing up. The hull was made from scratch and some smaller elements were borrowed from other works.

This class was named after a fictional Oregon town called Arcadia Bay. The design of cruiser itself was inspired by the Cleveland and the Northampton classes.

I hope ya'll like it! :D
Author:  bezobrazov [ May 25th, 2016, 7:07 pm ]
Post subject:  Re: US CA Arcadia Bay - AU ship
Hello TristanAlting! Looks like a most promising start indeed! However, it's very hard to judge in all fairness, due to the resizing of the image. Please re-upload it to a more userfriendly image host, such as Dropbox. I think it's the simplest tool. Just be sure to choose the folder named "Public" when uploading to SB. Anyway, there are a few things that I can already spot, and that you may want to reconsider, by further studying US design practices of the period era that you're evidently interested in: The bridge is very much atypical, non-USN. Either it needs to be an open control bridge with an AA-spotter bridge on top, like in most cruisers from 1942-43 onwards, or an enclosed one with extended bridge wings. (these would exist also in the first option!) Your whole superstructure appear a little too futuristic in part as well, but that may be your preference.
Are there enough beam space for four 5/38s the way you have them? There are no recesses in the superstructure, which appears to be quite wide. Maybe that's only an optic delusion due to the resizing, I don't know. Fix that issue and we shall find out!
The torpedoes are on what level? While TT:s would be perfectly plausible albeit, after 1938/40 highly unlikely, the way you've designed them is overly - and unnecessarily complex and complicated. The simpler way is to simply have them (one batch only!) abrest, or slightly abaft of the catapults, delete the weird "flying bridge" above, which will add nothing but additional debris in battle, and on a completely flush upper deck, instead of this weird recess, that doesn't fulfil any function except possibly jeopardize the overall hull strength!

I know quite a lot, it sould like, but, in fact, I detect that you're on the right path here, so I encourage you, in order to create a really believable and viable AU-ship to take time to study the USN practices at the time and then return to your ship and implement what you've found out!
Author:  Shigure [ May 25th, 2016, 8:47 pm ]
Post subject:  Re: US CA Arcadia Bay - AU ship
Thanks for the input! I'll make some changes in the future and reupload the image.
Author:  Colosseum [ May 25th, 2016, 8:54 pm ]
Post subject:  Re: US CA Arcadia Bay - AU ship
Wouldn't mind seeing a version that hasn't been resized by Photobucket's awful constraints...

Right off the bat I can tell you've used the screws and rudder from the Atlanta drawing, which are more or less fairly realistic but probably not suitable for a ship with five (!) 6"/47 turrets. I would suggest you base the screw arrangement off the Clevelands and Brooklyns and go to a 4-screw design which would be more believable on a ship of the displacement required for this many 6" turrets.

I think four 6" turrets is probably reasonable. I wouldn't want to place one of these heavily armored turrets at the 03 level like you've done for gun 63. The whole ship looks top heavy.

The hull above the waterline is fairly decent and looks nice, though I'd take care to make the bow a uniform curve from the top of the bow to the baseline. The location of the boot-topping (the black paint denoting the waterline) generally doesn't correspond with a change of the angle of the bow, at least on cruisers and destroyers.

Why a stern aircraft crane when you have amidships floatplane catapults?

You should decide on more or less what "year" this ship would be in service. Later designs have the floatplane handling facilities astern, and earlier designs they're amidships. Either way you will need a large crane for handling the floatplanes if you decide to keep them amidships. The fire hazard presented by aviation gas lines running amidships from stern tanks as well as the highly-flammable aircraft themselves didn't add much weight to keeping the floatplanes amidships...

Your mast arrangements look to be copied from this sheet which I specifically requested people not to do. ;) At any rate the radars on that sheet have all been redrawn and can be found in my signature.

It would be highly unlikely for any wartime cruiser design to have four Mk.37 directors for the 5"/38 secondary battery guns. This arrangement is generally seen only on the fast battleships.

The torpedo tubes should likely just be deleted if you're creating a later design. Either way, the cutout into the hull is entirely unnecessary and would as Bezo said just reduce the overall strength of the design. Those are the DD's quintuple torpedo tubes, so highly unlikely that you could fit them there anyway.

There is a single Mk.34 director for five (!) 6" turrets! What happens if it gets knocked out? Add another one aft and space it out a bit further from the forward Mk.37 director. I'm not sure the rangefinder would be able to fully rotate to any useful degree because it's so close to the forward director foundation. This would also result in optical interference between your forward directors as the rangefinder sights would be obscured by the other directors. ;)

You only need a siren on the forward funnel.

Torpedo directors were generally placed on the bridge wings to be used by the torpedo officers - never down on the main deck. It was a delicate piece of equipment that would suffer from wave action in that spot.

The catwalk over the torpedo tubes is a very "Japanese" feature and doesn't look right on an American ship.

The positioning of the 5"/38 secondary battery is questionable at best. Those dual mounts are wide mounts and I don't think they'd fit there, at least if this thing has the beam of a cruiser and not an aircraft carrier. It reminds me of the refitted Standard type BBs with their huge torpedo bulges.
Author:  Shigure [ May 26th, 2016, 2:37 pm ]
Post subject:  Re: US CA Arcadia Bay - AU ship
Hey guys I made some notable changes and am ready to re-upload the image...but I don't know how to do the dropbox thing.
Author:  citizen lambda [ May 26th, 2016, 2:42 pm ]
Post subject:  Re: US CA Arcadia Bay - AU ship
Take a look at this topic on how to use Dropbox.
Author:  Shigure [ May 26th, 2016, 3:29 pm ]
Post subject:  Re: US CA Arcadia Bay - AU ship
Updated the image!

*Dropbox doesn't work, so I tried another site*

-Removed the torpedo launchers
-Removed one 6" turret
-Moved the aircraft thingy to the aft section of the ship
-Changed the mast
-Added two gun directors
-Added two AA guns
-Changed the main bridge
-Changed the propellers

I also decided to keep the secondary guns because I like them
Author:  Colosseum [ May 26th, 2016, 3:33 pm ]
Post subject:  Re: US CA Arcadia Bay - AU ship
Just use Imgur...

You're still using the example masts I drew many years ago... :/
Author:  Shigure [ May 26th, 2016, 3:38 pm ]
Post subject:  Re: US CA Arcadia Bay - AU ship
Oops... I was supposed to copy them from the Cleveland...brb
Author:  Colosseum [ May 26th, 2016, 3:51 pm ]
Post subject:  Re: US CA Arcadia Bay - AU ship
Maybe don't copy them from anything and just draw them yourself? Generally speaking that kind of raw kitbashing (without any understanding of what you're copy/pasting) is frowned upon here. Especially given the amount of research we do making sure our real drawings are correct.

I provided the previously-mentioned radar masts sheet as a guideline for how to draw accurate masts for USN ships of the period. It would be nice if you reviewed it and LEARNED what you are doing vs. just copying my work around.
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