SDN World 3 Ship Design Thread

[Steve]

Yet a lot of material I've found states 1910-era ships' cruise speeds at 10-13 knots, not higher.

Granted it gets easier to get higher cruise speeds once coal is phased out.

[K. A. Pital]

Thanks to Ma Deuce. That boat rocks (minus the inadequate deck armor, heheh). I'll try Springsharp 3.0 beta actually, since I got problems with a previous version.

EDIT: Springsharp 3.0 works perfectly but I'm at loss with it. How do I install guns on the ship? Is there a guide for newbies?

[Ma Deuce]

Thanks to Ma Deuce. That boat rocks (minus the inadequate deck armor, heheh). I'll try Springsharp 3.0 beta actually, since I got problems with a previous version.

No problem. It just occurred to me that if:

A) they were available
B) you were insane enough

that design could alternatively support 8 x 20" guns .

EDIT: Springsharp 3.0 works perfectly but I'm at loss with it. How do I install guns on the ship? Is there a guide for newbies?

Did you specify the location of the gun mounts? Under the "Location" section in the tab for a specific gun battery, there should be an expending menu that says "none" by default; if you add guns without selecting their location, the entire design will not work, even if it's something as inconsequential as a single MG on a battleship. Of course, this assumes you're using 3.0b3; in 3b2 they default to one of the other location options, in which case your problem would lie elsewhere (though without more details I'm unsure of what that could be).

[K. A. Pital]

Nop, my best gun is 406 mm pattern 1914. I'm sticking to reality.

Deck armor problem is really an issue with all Russian WWI designs (the boat is just an oversized Maria or Izmail basically). Russian engineers believed in fast battlecruisers or battleships, not in slow but well-armored hulks. I presumed that ship could've been laid down in 1918 (when the GUK who rejected the initial design, was exchanged by the appropriate Red naval authority body), but still unfinished by 1925, and only launched in 1925, but commissioned in 1929 (meanwhile the 270m Alexeev dock, expanded in 1918, would be used to refurbish Okean into the carrier Komsomolets).

I used 30.3b. I put "16" barrels, and "4" mounts. I can't understand what to do with location.

[Sea Skimmer]

You want ‘centerline-distributed’ for the Russian Gangut style linear turret arrangement.

[K. A. Pital]

Okay, I did eh... "Quad mount", then "Centerline distributed". Dum. Shows nothing on the freeboard.

Hey, perhaps you could send me your design Ma Deuce, you're using 3.0b3 as well? I'd open it and see what I've done wrong.

[Sea Skimmer]

Above and below freeboard is only relevant if the guns are not on the main deck, which for the most part they are on all those Imperial Russian projects. Above is used to indicate superfiring or other raised positions, below is guns below the main deck, which almost be default means hull casemates except a handful of exceptions like that one ship which has the middle 152mm turret lower.

As far as I can tell, differences in the actual freeboard of the main deck and thus the height of guns on the main deck at different locations are to be accounted for on the freeboard page alone. But I am not certain on that.

[Ma Deuce]

Okay, I did eh... "Quad mount", then "Centerline distributed". Dum. Shows nothing on the freeboard

Wait a sec, I think I understand what you're getting at: You're wondering why you don't see a representation of the gun mounts on the dynamic side view of the ship's hull on the freeboard page? If so, the simple answer is that they do not appear there, that representation of the hull exists to allow you to view the relative height of various sections of the deck when inputting the freeboard, as well as the rough appearance of such hull options as the bow angle and stern overhang. It's possible that some iteration of the "official" Springsharp 3 will show the gun mounts in that page, but as of the beta it shows the hull and the hull only. On previous versions of Springsharp (2.1 and earlier), we didn't even get that though: just a fixed image pointing out where various portions of the deck were on the hull.

If you still want a copy of my design (yes, I used 3b3), just drop me a PM with your e-mail address and I'll send it right over.

[K. A. Pital]

Now, thanks to corrections - the modified and updated Red Navy, break 1924 to 1925

The Imperatritsa Maria hull (overturned) has been converted as the aircraft carrier "Sokol" (similar to French Bearn in absolutely everything, basically a slightly undersized Izmail carrier conversion project), thus the accomplishment date was moved to that of Bearn (giving a year for slack, not 1927, but 1928). The hull of Gavrilov 16" BB occupies until New Year 1925 basically, the largest Russian dock (Alexeev dock in Petrograd). The Black sea docks are occupied by training ship "Ocean" being converted into the carrier "Komsomolets" according to the real project. A total of 88500 tons for three (3) large combatants constructed, two of which are converts with hull pre-made - nothing too outlandish I presume. Then would be a cessation of large military ship construction until 1930s (civil construction continues onwards, filling the docks with large tankers bulkers etc).

Four Izmails were finished break 1910s-1920s, the 7 surviving Maria and Gangut battleships serve the Red Navy too. Eight light cruisers to accompany fast action surface groups have all been built.

16 pre-dreads (7 BB, 3 AC, 6 PC) linger on as training and expendable combat vessels. 45 modern and 90 old destroyers (135 total). 41 submarine.

I forgot to add 5 surviving pre-WWI gunboats, so there they are.

[Norseman]

Gah! I will have to decomission my 1909s and 1911s to get within the tonnage limits! Then again they are obsolete.

[Slacker]

Warsaw, Poland Heavy Cruiser laid down 1920

Displacement:
10,614 t light; 11,074 t standard; 11,748 t normal; 12,287 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(569.58 ft / 560.00 ft) x 63.00 ft x (21.00 / 21.76 ft)
(173.61 m / 170.69 m) x 19.20 m x (6.40 / 6.63 m)

Armament:
6 - 8.00" / 203 mm 45.0 cal guns - 258.18lbs / 117.11kg shells, 150 per gun
Breech loading guns in turret on barbette mounts, 1920 Model
1 x 2-gun mount on centreline forward
1 raised mount
2 x Twin mounts on centreline ends, evenly spread
2 raised mounts
6 - 5.00" / 127 mm 25.0 cal guns - 56.77lbs / 25.75kg shells, 500 per gun
Dual purpose guns in deck and hoist mounts, 1920 Model
6 x Single mounts on sides, evenly spread
2 raised mounts
18 - 0.50" / 12.7 mm 45.0 cal guns - 0.07lbs / 0.03kg shells, 3,000 per gun
Dual purpose guns in deck mounts, 1920 Model
5 x 2 row twin mounts on sides, evenly spread
4 x 2 row twin mounts on centreline ends, evenly spread
Weight of broadside 1,891 lbs / 858 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5.00" / 127 mm 362.00 ft / 110.34 m 13.00 ft / 3.96 m
Ends: 2.00" / 51 mm 198.00 ft / 60.35 m 13.00 ft / 3.96 m
Upper: 4.00" / 102 mm 362.00 ft / 110.34 m 10.00 ft / 3.05 m
Main Belt covers 99 % of normal length

- Torpedo Bulkhead - Additional damage containing bulkheads:
1.00" / 25 mm 316.00 ft / 96.32 m 20.00 ft / 6.10 m
Beam between torpedo bulkheads 56.00 ft / 17.07 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.00" / 127 mm 3.00" / 76 mm 5.00" / 127 mm
2nd: 1.00" / 25 mm 1.00" / 25 mm 2.00" / 51 mm
3rd: 0.50" / 13 mm 0.25" / 6 mm -

- Armoured deck - single deck:
For and Aft decks: 2.00" / 51 mm
Forecastle: 2.00" / 51 mm Quarter deck: 2.00" / 51 mm

- Conning towers: Forward 6.00" / 152 mm, Aft 2.00" / 51 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 76,681 shp / 57,204 Kw = 30.00 kts
Range 4,100nm at 15.00 kts
Bunker at max displacement = 1,213 tons

Complement:
563 - 733

Cost:
£2.152 million / $8.608 million

Distribution of weights at normal displacement:
Armament: 431 tons, 3.7 %
- Guns: 431 tons, 3.7 %
Armour: 3,536 tons, 30.1 %
- Belts: 1,772 tons, 15.1 %
- Torpedo bulkhead: 234 tons, 2.0 %
- Armament: 518 tons, 4.4 %
- Armour Deck: 923 tons, 7.9 %
- Conning Towers: 89 tons, 0.8 %
Machinery: 2,681 tons, 22.8 %
Hull, fittings & equipment: 3,965 tons, 33.7 %
Fuel, ammunition & stores: 1,135 tons, 9.7 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
14,609 lbs / 6,626 Kg = 57.1 x 8.0 " / 203 mm shells or 2.3 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 3.0 ft / 0.9 m
Roll period: 15.3 seconds
Steadiness - As gun platform (Average = 50 %): 49 %
- Recoil effect (Restricted arc if above 1.00): 0.47
Seaboat quality (Average = 1.00): 0.98

Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.555 / 0.560
Length to Beam Ratio: 8.89 : 1
'Natural speed' for length: 23.66 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 5.00 ft / 1.52 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 26.00 ft / 7.92 m, 23.00 ft / 7.01 m
- Forward deck: 30.00 %, 23.00 ft / 7.01 m, 18.00 ft / 5.49 m
- Aft deck: 35.00 %, 18.00 ft / 5.49 m, 18.00 ft / 5.49 m
- Quarter deck: 15.00 %, 18.00 ft / 5.49 m, 18.00 ft / 5.49 m
- Average freeboard: 19.99 ft / 6.09 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 99.3 %
- Above water (accommodation/working, high = better): 160.3 %
Waterplane Area: 24,737 Square feet or 2,298 Square metres
Displacement factor (Displacement / loading): 112 %
Structure weight / hull surface area: 109 lbs/sq ft or 530 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.94
- Longitudinal: 1.31
- Overall: 0.97
Caution: Hull subject to strain in open-sea
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

The first attempt at a Polish home-grown heavy cruiser. Also the first time I've used Spring Sharp. Don't mock me too much.

[Slacker]

And after being castigated for the mistakes I made the first time, another try at the ship, changing its role and purpose a bit.

Warsaw, Poland Light Cruiser laid down 1921

Displacement:
8,033 t light; 8,405 t standard; 8,987 t normal; 9,453 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(570.00 ft / 570.00 ft) x 65.00 ft x (15.00 / 21.72 ft)
(173.74 m / 173.74 m) x 19.81 m x (4.57 / 6.62 m)

Armament:
12 - 6.00" / 152 mm 45.0 cal guns - 108.92lbs / 49.41kg shells, 250 per gun
Breech loading guns in turret on barbette mounts, 1921 Model
4 x 3-gun mounts on centreline, evenly spread
2 raised mounts
8 - 3.00" / 76.2 mm 45.0 cal guns - 13.62lbs / 6.18kg shells, 150 per gun
Quick firing guns in deck and hoist mounts, 1921 Model
8 x Single mounts on sides, evenly spread
12 - 0.50" / 12.7 mm 45.0 cal guns - 0.06lbs / 0.03kg shells, 5,000 per gun
Anti-air guns in deck mounts, 1921 Model
6 x Twin mounts on sides, evenly spread
Weight of broadside 1,417 lbs / 643 kg
Main Torpedoes
4 - 19.0" / 483 mm, 22.00 ft / 6.71 m torpedoes - 1.189 t each, 4.756 t total
In 2 sets of deck mounted carriage/fixed tubes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.00" / 76 mm 451.00 ft / 137.46 m 9.00 ft / 2.74 m
Ends: 3.00" / 76 mm 100.00 ft / 30.48 m 9.00 ft / 2.74 m
19.00 ft / 5.79 m Unarmoured ends
Main Belt covers 122 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.00" / 76 mm 1.00" / 25 mm 3.00" / 76 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 85,857 shp / 64,049 Kw = 32.00 kts
Range 4,100nm at 15.00 kts
Bunker at max displacement = 1,047 tons

Complement:
460 - 599

Cost:
£2.112 million / $8.448 million

Distribution of weights at normal displacement:
Armament: 411 tons, 4.6 %
- Guns: 405 tons, 4.5 %
- Weapons: 6 tons, 0.1 %
Armour: 840 tons, 9.3 %
- Belts: 592 tons, 6.6 %
- Armament: 248 tons, 2.8 %
Machinery: 2,957 tons, 32.9 %
Hull, fittings & equipment: 3,826 tons, 42.6 %
Fuel, ammunition & stores: 954 tons, 10.6 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
8,184 lbs / 3,712 Kg = 75.8 x 6.0 " / 152 mm shells or 1.4 torpedoes
Stability (Unstable if below 1.00): 1.00
Metacentric height 2.6 ft / 0.8 m
Roll period: 16.9 seconds
Steadiness - As gun platform (Average = 50 %): 74 %
- Recoil effect (Restricted arc if above 1.00): 0.45
Seaboat quality (Average = 1.00): 0.88

Hull form characteristics:
Hull has rise forward of midbreak, low quarterdeck ,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.566 / 0.411
Length to Beam Ratio: 8.77 : 1
'Natural speed' for length: 23.87 kts
Power going to wave formation at top speed: 59 %
Trim (Max stability = 0, Max steadiness = 100): 84
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 26.00 ft / 7.92 m, 21.00 ft / 6.40 m
- Forward deck: 30.00 %, 21.00 ft / 6.40 m, 21.00 ft / 6.40 m
- Aft deck: 35.00 %, 20.00 ft / 6.10 m, 20.00 ft / 6.10 m
- Quarter deck: 15.00 %, 18.00 ft / 5.49 m, 18.00 ft / 5.49 m
- Average freeboard: 20.60 ft / 6.28 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 121.5 %
- Above water (accommodation/working, high = better): 221.2 %
Waterplane Area: 26,248 Square feet or 2,439 Square metres
Displacement factor (Displacement / loading): 112 %
Structure weight / hull surface area: 107 lbs/sq ft or 522 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.00
- Longitudinal: 1.29
- Overall: 1.03
Cramped machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

[K. A. Pital]

I've adjusted Ivan Bubnov-class battleship, since 265 according to project was the OA length, not waterline (hence a little smaller displacement), or so it said in the book.

"Ivan Bubnov", USSR Battleship laid down 1918

Displacement:
44 684 t light; 47 598 t standard; 49 774 t normal; 51 514 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(869,42 ft / 865,26 ft) x 112,86 ft x (30,97 / 31,84 ft)
(265,00 m / 263,73 m) x 34,40 m x (9,44 / 9,71 m)

Armament:
16 - 16,00" / 406 mm 45,0 cal guns - 2 461,00lbs / 1 116,29kg shells, 75 per gun
Breech loading guns in turret on barbette mounts, 1914 Model
4 x 4-gun mounts on centreline, evenly spread
24 - 5,91" / 150 mm 52,0 cal guns - 104,19lbs / 47,26kg shells, 200 per gun
Quick firing guns in casemate mounts, 1918 Model
24 x Single mounts on sides, evenly spread
24 hull mounts in casemates- Limited use in heavy seas
Weight of broadside 41 877 lbs / 18 995 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 11,8" / 300 mm 574,15 ft / 175,00 m 9,84 ft / 3,00 m
Ends: 1,97" / 50 mm 295,28 ft / 90,00 m 13,12 ft / 4,00 m
Upper: 1,97" / 50 mm 574,15 ft / 175,00 m 14,76 ft / 4,50 m
Main Belt covers 102% of normal length
Main belt does not fully cover magazines and engineering spaces

- Torpedo Bulkhead - Additional damage containing bulkheads:
0,98" / 25 mm 574,15 ft / 175,00 m 27,56 ft / 8,40 m
Beam between torpedo bulkheads 92,68 ft / 28,25 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 15,7" / 400 mm 7,87" / 200 mm 9,84" / 250 mm
2nd: 1,97" / 50 mm 1,97" / 50 mm 1,97" / 50 mm

- Armoured deck - multiple decks:
For and Aft decks: 3,94" / 100 mm
Forecastle: 1,18" / 30 mm Quarter deck: 1,18" / 30 mm

- Conning towers: Forward 15,75" / 400 mm, Aft 0,00" / 0 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 119 371 shp / 89 051 Kw = 27,63 kts
Range 5 000nm at 15,00 kts
Bunker at max displacement = 3 916 tons

Complement:
1 666 - 2 166

Cost:
£10,782 million / $43,129 million

Distribution of weights at normal displacement:
Armament: 7 054 tons, 14,2%
- Guns: 7 054 tons, 14,2%
Armour: 13 288 tons, 26,7%
- Belts: 3 814 tons, 7,7%
- Torpedo bulkhead: 576 tons, 1,2%
- Armament: 3 979 tons, 8,0%
- Armour Deck: 4 460 tons, 9,0%
- Conning Tower: 459 tons, 0,9%
Machinery: 4 306 tons, 8,7%
Hull, fittings & equipment: 20 036 tons, 40,3%
Fuel, ammunition & stores: 5 090 tons, 10,2%
Miscellaneous weights: 0 tons, 0,0%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
60 722 lbs / 27 543 Kg = 29,6 x 16,0 " / 406 mm shells or 7,3 torpedoes
Stability (Unstable if below 1.00): 1,25
Metacentric height 9,0 ft / 2,8 m
Roll period: 15,8 seconds
Steadiness - As gun platform (Average = 50 %): 52 %
- Recoil effect (Restricted arc if above 1.00): 0,91
Seaboat quality (Average = 1.00): 1,30

Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0,576 / 0,580
Length to Beam Ratio: 7,67 : 1
'Natural speed' for length: 29,42 kts
Power going to wave formation at top speed: 44 %
Trim (Max stability = 0, Max steadiness = 100): 40
Bow angle (Positive = bow angles forward): 10,00 degrees
Stern overhang: -6,56 ft / -2,00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20,00%, 23,62 ft / 7,20 m, 23,62 ft / 7,20 m
- Forward deck: 30,00%, 23,62 ft / 7,20 m, 23,62 ft / 7,20 m
- Aft deck: 35,00%, 23,62 ft / 7,20 m, 23,62 ft / 7,20 m
- Quarter deck: 15,00%, 23,62 ft / 7,20 m, 23,62 ft / 7,20 m
- Average freeboard: 23,62 ft / 7,20 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 105,1%
- Above water (accommodation/working, high = better): 188,6%
Waterplane Area: 69 835 Square feet or 6 488 Square metres
Displacement factor (Displacement / loading): 95%
Structure weight / hull surface area: 245 lbs/sq ft or 1 197 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,94
- Longitudinal: 1,19
- Overall: 0,97
Caution: Hull subject to strain in open-sea
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room
Good seaboat, rides out heavy weather easily

[Beowulf]

For reference, the major combatants of my navy (the Haijun).

General ship characteristics (exact speeds subject to change):
Armored Cruiser:
CA1909
Primary battery: 12x300mm (4 triple turrets)
27.25kt
CA1913
Primary battery: 8x360mm (4 2-gun turrets)
28kt
CA1917
Primary battery: 10x360mm (2 2-gun/2 3-gun turrets)
30kt
CAB1921
Primary battery: 9x405mm (3 3-gun turrets) (officially 360mm/50 guns)
30kt

Battleship:
BB1909
Primary battery: 8x360mm (4 2-gun turrets)
21kt
BB1913
Primary battery: 12x360mm (4 3-gun turrets)
21kt
BB1917
Primary battery: 8x405mm (4 2-gun turrets)
21kt
BB1925
Primary battery: 9x456mm (3 3-gun turrets) (officially 405mm/50 guns)
23kt

Scout Cruiser:
CS1911
Primary battery: 8x150mm (4 2-gun turrets)
30 kt
CS1915
Primary battery: 10x150mm (2 2-gun/2 3-gun turrets)
32 kt
CS1919
Primary battery: 12x150mm (4 3-gun turrets)
32 kt
CS1923
Primary battery: 12x150mm (4 3-gun turrets)
Secondary battery: 8x120mm DP (4 twin turrets)
32.5 kt

Ships are generally armored against their own guns.

Not all of these ships have been simmed out (in fact, most of them haven't yet), and so, tonnage isn't available. Dates are lay down dates. Commissioning dates are generally 3 years later.

[Thanas]

Beowulf, I'd really be interested in seeing how you managed to have 9 18inch guns on a 23kt ship and 8 16 inch on a 21kt ship. Those ships must be very thinly armored or have very small range/be crappy seaboats.


Slacker, your ships are very poor seaboats. Not sure if that is so good for fast combatants, I mean you do not want to have your ships sink in strong storms.


Stas, your ship is very overloaded, the hull is quite strained. I am not so sure if that is good in a battleship, you want it to take some damage.

[Steve]

Probably from how fast Slacker's making the cruiser compared to its natural speed. I think practically that'd make his ship an okay seaboat until it tried to hit, oh, 29 knots. Then it becomes less capable.

[Steve]

Yeah, that's what it is. Slack's cruiser is too fast for his natural speed, so the design's seakeeping is capped, it literally can't be a good seaboat.... at max speed anyway. At cruise speed I imagine it works just fine.

I think I'll generally rule here that such a ship will not sink abruptly in bad weather if it's speed is reasonable, but at higher speeds more power is lost to wave formation (as the ship is past its natural speed capability) and the ship starts getting more wet.

I'm not sure how logical SpringSharp is in this, since lots of designs broke 30 knots, but eh, whatever.

[Fingolfin_Noldor]

Byzantine Battleship, to be laid in 1925. Comments?

Proto Battleship, Byzantium Battleship laid down 1925

Displacement:
47,404 t light; 49,983 t standard; 54,662 t normal; 58,406 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(892.40 ft / 869.42 ft) x 108.27 ft x (34.45 / 36.29 ft)
(272.00 m / 265.00 m) x 33.00 m x (10.50 / 11.06 m)

Armament:
9 - 16.00" / 406 mm 50.0 cal guns - 2,168.09lbs / 983.43kg shells, 120 per gun
Breech loading guns in turret on barbette mounts, 1925 Model
3 x 3-gun mounts on centreline ends, majority forward
1 raised mount - superfiring
20 - 6.00" / 152 mm 45.0 cal guns - 108.92lbs / 49.41kg shells, 150 per gun
Breech loading guns in casemate mounts, 1925 Model
20 x 2-gun mounts on sides amidships
32 - 0.79" / 20.0 mm 70.0 cal guns - 0.27lbs / 0.12kg shells, 600 per gun
Anti-air guns in deck mounts, 1925 Model
8 x 4-gun mounts on centreline, aft deck forward
Weight of broadside 21,700 lbs / 9,843 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 15.0" / 381 mm 570.00 ft / 173.74 m 18.00 ft / 5.49 m
Ends: Unarmoured
Main Belt covers 101 % of normal length

- Torpedo Bulkhead:
5.00" / 127 mm 410.00 ft / 124.97 m 27.00 ft / 8.23 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 18.0" / 457 mm 10.0" / 254 mm 17.0" / 432 mm
2nd: 8.00" / 203 mm 6.00" / 152 mm 8.00" / 203 mm

- Armoured deck - multiple decks: 5.00" / 127 mm For and Aft decks
Forecastle: 4.00" / 102 mm Quarter deck: 4.00" / 102 mm

- Conning towers: Forward 11.00" / 279 mm, Aft 0.00" / 0 mm

Machinery:
Oil fired boilers, steam turbines,
Electric motors, 4 shafts, 151,461 shp / 112,990 Kw = 30.00 kts
Range 10,000nm at 16.00 kts
Bunker at max displacement = 8,423 tons

Complement:
1,786 - 2,323

Cost:
£14.639 million / $58.556 million

Distribution of weights at normal displacement:
Armament: 4,615 tons, 8.4 %
Armour: 19,685 tons, 36.0 %
- Belts: 6,527 tons, 11.9 %
- Torpedo bulkhead: 2,048 tons, 3.7 %
- Armament: 4,415 tons, 8.1 %
- Armour Deck: 6,354 tons, 11.6 %
- Conning Tower: 341 tons, 0.6 %
Machinery: 4,918 tons, 9.0 %
Hull, fittings & equipment: 18,094 tons, 33.1 %
Fuel, ammunition & stores: 7,258 tons, 13.3 %
Miscellaneous weights: 92 tons, 0.2 %
- Hull above water: 20 tons
- On freeboard deck: 72 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
72,587 lbs / 32,925 Kg = 35.4 x 16.0 " / 406 mm shells or 12.4 torpedoes
Stability (Unstable if below 1.00): 1.00
Metacentric height 5.7 ft / 1.7 m
Roll period: 19.1 seconds
Steadiness - As gun platform (Average = 50 %): 75 %
- Recoil effect (Restricted arc if above 1.00): 0.73
Seaboat quality (Average = 1.00): 1.09

Hull form characteristics:
Hull has a flush deck,
a ram bow and large transom stern
Block coefficient (normal/deep): 0.590 / 0.598
Length to Beam Ratio: 8.03 : 1
'Natural speed' for length: 33.90 kts
Power going to wave formation at top speed: 49 %
Trim (Max stability = 0, Max steadiness = 100): 69
Bow angle (Positive = bow angles forward): 35.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 24.00 %, 32.81 ft / 10.00 m, 19.69 ft / 6.00 m
- Forward deck: 45.00 %, 19.69 ft / 6.00 m, 19.69 ft / 6.00 m
- Aft deck: 17.00 %, 19.69 ft / 6.00 m, 19.69 ft / 6.00 m
- Quarter deck: 14.00 %, 19.69 ft / 6.00 m, 22.97 ft / 7.00 m
- Average freeboard: 21.17 ft / 6.45 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 80.1 %
- Above water (accommodation/working, high = better): 149.2 %
Waterplane Area: 71,069 Square feet or 6,603 Square metres
Displacement factor (Displacement / loading): 110 %
Structure weight / hull surface area: 211 lbs/sq ft or 1,030 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.01
- Longitudinal: 1.04
- Overall: 1.01
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform

[K. A. Pital]

Stas, your ship is very overloaded, the hull is quite strained. I am not so sure if that is good in a battleship, you want it to take some damage.

With 1920s materials that would not pose a problem, however. I changed the ship's laid down date and it gave me according materials (previously it reported no strain in SS), but IRL this is a very long-going project that was mostly built in the 1920s, not the 1910s. I didn't use to have that "hull strain" before and the only thing I changed was the laid down date. Basically it makes no sense to lay down such a ship post-1918 though, because it's a 1914 design. I presumed it's laying down was the dying breath of the Russian Empire (in this reality).

Those ships must be very thinly armored or have very small range/be crappy seaboats.

Most likely they are. Kinda like the British Glorious. "Fast light cruiser".

[Thanas]

Stas, your ship is very overloaded, the hull is quite strained. I am not so sure if that is good in a battleship, you want it to take some damage.

With 1920s materials that would not pose a problem, however. I changed the ship's laid down date and it gave me according materials (previously it reported no strain in SS), but IRL this is a very long-going project that was mostly built in the 1920s, not the 1910s. I didn't use to have that "hull strain" before and the only thing I changed was the laid down date. Basically it makes no sense to lay down such a ship post-1918 though, because it's a 1914 design. I presumed it's laying down was the dying breath of the Russian Empire (in this reality).

Well, I would have no problem with it if you give the laying down date at 1918 and rationalize it in game as "was rebuilt in 1920". I think that would be the best solution to avoid anybody else from building ships with less than 1.0 integrity.

Just a suggestion.

Also, your armor....good lord.

Yeah, that's what it is. Slack's cruiser is too fast for his natural speed, so the design's seakeeping is capped, it literally can't be a good seaboat.... at max speed anyway. At cruise speed I imagine it works just fine.

I think I'll generally rule here that such a ship will not sink abruptly in bad weather if it's speed is reasonable, but at higher speeds more power is lost to wave formation (as the ship is past its natural speed capability) and the ship starts getting more wet.

I'm not sure how logical SpringSharp is in this, since lots of designs broke 30 knots, but eh, whatever.

It is quite possible to design hulls that reach 31 knots as natural speed, I have done so myself. The problem is that his hull design is just not that good for a high speed ship.

Those ships must be very thinly armored or have very small range/be crappy seaboats.

Most likely they are. Kinda like the British Glorious. "Fast light cruiser". [/quote]

[Slacker]

Yeah, that's what it is. Slack's cruiser is too fast for his natural speed, so the design's seakeeping is capped, it literally can't be a good seaboat.... at max speed anyway. At cruise speed I imagine it works just fine.

I think I'll generally rule here that such a ship will not sink abruptly in bad weather if it's speed is reasonable, but at higher speeds more power is lost to wave formation (as the ship is past its natural speed capability) and the ship starts getting more wet.

I'm not sure how logical SpringSharp is in this, since lots of designs broke 30 knots, but eh, whatever.

That's more or less what I figured, actually. Playing around with the design where I reduce its max speed seems to improve its seakeeping. Honestly if the thing's at sea for more than two weeks at a clip something's wrong, it's not like Baltic patrols are going to be wide ranging.

[Thanas]

Yes, but I'd rather advise you to design a better hull or reduce the guns. Otherwise you have a large problem. The baltic does have some heavy storms and in battle I wouldn't want to be in a bad seaboat - a few hits and the situation just gets worse....

[Ma Deuce]

It is quite possible to design hulls that reach 31 knots as natural speed, I have done so myself.

It's also quite possible to design ships that are capable of well in excess of their "natural speed" and still be good seaboats, so long as you devote enough tonnage to freeboard. For instance, my Springsharp replica of the Baltimore class cruiser has a natural speed of 27.7, yet is actually capable of 33.4, while still having a 1.20 seakeeping rating; Of course, that design displaces 14,500 tons standard, and the smaller you go the harder it becomes to pull this off. It's very difficult to make viable destroyers that have better than 0.7 seakeeping, which is not unrealistic, as in heavy seas a 35 knot destroyer could be very hard pressed to keep up with a 21 knot battleship.

[Raj Ahten]

I'm trying to work out my fleet list and I'd really appreciate some help in doing so. I figure my nation has only recently become a big navy nation and that a lot of foreign assistance was involved (similar to how Japan consulted foreign naval experts.) This means a lot of my early designs are likely foreign built or at least foreign designed ships.

My fleet is also likely mostly new as I figure there was a huge building/purchasing program between say 1915 and the start date. I'm looking to make a force that is balanced pretty evenly between puttering around South American waters and long range power projection. Chilatina is looking to be a big player on he international stage now. So are there any historical designs which I should strongly investigate? Any to avoid?

[Steve]

That all depends on what you want to do with your Navy, Raj, and how much power projection you need. I'd figure your nay is geared to challenge the Brazilian one, so your ships should naturally reflect a capability to sail the seas bordering South America and to at least match Brazilian ships in firepower and protection.

Also, I think the point of seakeeping cap from an excessive max speed over Natural speed is that when you go to max speed you lose seaworthiness because of excessive wave formation. A cruiser like Slack's, even in a heavy Baltic storm, could probably limit speed and be just fine.

And for everyone's notice, to improve seakeeping you have to increase length, reduce block coefficient, or raise freeboard. Of course, there are tradeoffs - IIRC a bad beam:length ratio makes recoil worse, as does higher freeboard.