Second Caliphate Speculative Design Studies

[TexanCowboy]

Just for comparison, here is your ship from the Nassau thread:

CSA 1920 2nd Class Cruiser, Confederate States of America 2nd Class Cruiser laid down 1920

Displacement:
   12,000 t light; 12,563 t standard; 14,172 t normal; 15,459 t full load

Dimensions: Length overall / water x beam x draught
   627.00 ft / 610.00 ft x 66.00 ft x 22.00 ft (normal load)
   191.11 m / 185.93 m x 20.12 m  x 6.71 m

Armament:
      12 - 7.50" / 191 mm guns (4x3 guns), 200.00lbs / 90.72kg shells, 1920 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      4 - 3.50" / 88.9 mm guns in single mounts, 20.00lbs / 9.07kg shells, 1920 Model
     Quick firing guns in deck mounts with hoists
     on side, all amidships
      2 - 1.58" / 40.0 mm guns in single mounts, 2.00lbs / 0.91kg shells, 1920 Model
     Anti-aircraft guns in deck mounts
     on side, evenly spread, all raised mounts
      8 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1920 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 2,485 lbs / 1,127 kg
   Shells per gun, main battery: 200
   6 - 21.0" / 533.4 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.00" / 76 mm   426.54 ft / 130.01 m   16.50 ft / 5.03 m
   Ends:   Unarmoured
     Main Belt covers 108 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   5.00" / 127 mm   2.00" / 51 mm      3.00" / 76 mm
   2nd:         -            -         1.50" / 38 mm
   3rd:         -      1.00" / 25 mm            -

   - Armour deck: 1.50" / 38 mm, Conning tower: 4.00" / 102 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 108,000 shp / 80,568 Kw = 32.03 kts
   Range 15,000nm at 12.00 kts
   Bunker at max displacement = 2,896 tons

Complement:
   649 - 844

Cost:
   £2.893 million / $11.572 million

Distribution of weights at normal displacement:
   Armament: 328 tons, 2.3 %
   Armour: 2,153 tons, 15.2 %
      - Belts: 877 tons, 6.2 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 439 tons, 3.1 %
      - Armour Deck: 787 tons, 5.6 %
      - Conning Tower: 50 tons, 0.4 %
   Machinery: 3,776 tons, 26.6 %
   Hull, fittings & equipment: 5,401 tons, 38.1 %
   Fuel, ammunition & stores: 2,171 tons, 15.3 %
   Miscellaneous weights: 342 tons, 2.4 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     15,135 lbs / 6,865 Kg = 71.8 x 7.5 " / 191 mm shells or 1.6 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 3.2 ft / 1.0 m
   Roll period: 15.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.64
   Seaboat quality  (Average = 1.00): 1.20

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.560
   Length to Beam Ratio: 9.24 : 1
   'Natural speed' for length: 24.70 kts
   Power going to wave formation at top speed: 58 %
   Trim (Max stability = 0, Max steadiness = 100): 58
   Bow angle (Positive = bow angles forward): 29.54 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      30.00 ft / 9.14 m
      - Forecastle (15 %):   28.00 ft / 8.53 m
      - Mid (60 %):      27.00 ft / 8.23 m (17.50 ft / 5.33 m aft of break)
      - Quarterdeck (15 %):   17.50 ft / 5.33 m
      - Stern:      18.00 ft / 5.49 m
      - Average freeboard:   23.68 ft / 7.22 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 107.6 %
      - Above water (accommodation/working, high = better): 178.2 %
   Waterplane Area: 28,362 Square feet or 2,635 Square metres
   Displacement factor (Displacement / loading): 112 %
   Structure weight / hull surface area: 115 lbs/sq ft or 563 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.94
      - Longitudinal: 1.71
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

[Guinness]

The two are only barely comparable. Different engine year. Different main armament requirements. Mostly a different mission too.

And the Caliphate ship is required to fit in a type 2 dock.

[Guinness]

Later just for fun I'll do a half sister which swaps mines for guns.

[Guinness]

Same hull. Basically comes out being a slightly early and overweight London Treaty cruiser...

1922 Large Cruiser, 2nd Caliphate Cruiser laid down 1922 (Engine 1916)

Displacement:
   11,880 t light; 12,339 t standard; 13,299 t normal; 14,067 t full load

Dimensions: Length overall / water x beam x draught
   557.75 ft / 547.90 ft x 67.26 ft x 22.97 ft (normal load)
   170.00 m / 167.00 m x 20.50 m  x 7.00 m

Armament:
      15 - 5.91" / 150 mm guns (5x3 guns), 102.98lbs / 46.71kg shells, 1922 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, majority aft, 3 raised mounts - superfiring
      2 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.88kg shells, 1922 Model
     Anti-aircraft guns in deck mounts
     on side, all amidships, all raised mounts - superfiring
      8 - 0.51" / 13.0 mm guns in single mounts, 0.07lbs / 0.03kg shells, 1922 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 1,549 lbs / 703 kg
   Shells per gun, main battery: 224
   12 - 21.0" / 533.4 mm submerged torpedo tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   2.95" / 75 mm   476.21 ft / 145.15 m   16.40 ft / 5.00 m
   Ends:   Unarmoured
     Main Belt covers 134 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   3.54" / 90 mm   2.36" / 60 mm      2.76" / 70 mm
   2nd:         -      0.98" / 25 mm            -

   - Armour deck: 1.97" / 50 mm, Conning tower: 2.76" / 70 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 110,500 shp / 82,433 Kw = 32.00 kts
   Range 7,995nm at 12.00 kts
   Bunker at max displacement = 1,728 tons

Complement:
   618 - 804

Cost:
   £3.150 million / $12.598 million

Distribution of weights at normal displacement:
   Armament: 194 tons, 1.5 %
   Armour: 2,312 tons, 17.4 %
      - Belts: 930 tons, 7.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 412 tons, 3.1 %
      - Armour Deck: 937 tons, 7.0 %
      - Conning Tower: 33 tons, 0.3 %
   Machinery: 4,117 tons, 31.0 %
   Hull, fittings & equipment: 4,880 tons, 36.7 %
   Fuel, ammunition & stores: 1,419 tons, 10.7 %
   Miscellaneous weights: 377 tons, 2.8 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     9,523 lbs / 4,320 Kg = 92.5 x 5.9 " / 150 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 3.3 ft / 1.0 m
   Roll period: 15.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.44
   Seaboat quality  (Average = 1.00): 1.22

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.550
   Length to Beam Ratio: 8.15 : 1
   'Natural speed' for length: 23.41 kts
   Power going to wave formation at top speed: 63 %
   Trim (Max stability = 0, Max steadiness = 100): 57
   Bow angle (Positive = bow angles forward): 18.25 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      29.86 ft / 9.10 m
      - Forecastle (15 %):   28.54 ft / 8.70 m
      - Mid (69 %):      27.89 ft / 8.50 m (20.01 ft / 6.10 m aft of break)
      - Quarterdeck (15 %):   20.01 ft / 6.10 m
      - Stern:      20.67 ft / 6.30 m
      - Average freeboard:   25.85 ft / 7.88 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 133.7 %
      - Above water (accommodation/working, high = better): 208.8 %
   Waterplane Area: 25,717 Square feet or 2,389 Square metres
   Displacement factor (Displacement / loading): 107 %
   Structure weight / hull surface area: 109 lbs/sq ft or 533 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.90
      - Longitudinal: 2.48
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

Misc Weights:
250t: Fire Control
25t: Long Range Wireless
24t: Torpedoes: 4 submerged tubes with 3 fish per tube
50t: Extra ventilation and crew comfort
23t: Reserve

Edit found and fixed a little problem.

[Guinness]

And even more conventionally, a slower 210mm armed version:

1922 Large Cruiser, 2nd Caliphate Cruiser laid down 1922 (Engine 1916)

Displacement:
   11,895 t light; 12,339 t standard; 13,299 t normal; 14,067 t full load

Dimensions: Length overall / water x beam x draught
   557.74 ft / 547.90 ft x 67.26 ft x 22.97 ft (normal load)
   170.00 m / 167.00 m x 20.50 m  x 7.00 m

Armament:
      8 - 8.27" / 210 mm guns (4x2 guns), 282.57lbs / 128.17kg shells, 1922 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      2 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.88kg shells, 1922 Model
     Anti-aircraft guns in deck mounts
     on side, all amidships, all raised mounts - superfiring
      8 - 0.51" / 13.0 mm guns in single mounts, 0.07lbs / 0.03kg shells, 1922 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 2,265 lbs / 1,027 kg
   Shells per gun, main battery: 141
   12 - 21.0" / 533.4 mm submerged torpedo tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   2.95" / 75 mm   457.68 ft / 139.50 m   16.40 ft / 5.00 m
   Ends:   Unarmoured
     Main Belt covers 129 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   3.54" / 90 mm   2.36" / 60 mm      2.95" / 75 mm
   2nd:         -      0.98" / 25 mm            -

   - Armour deck: 1.97" / 50 mm, Conning tower: 2.95" / 75 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 100,000 shp / 74,600 Kw = 31.25 kts
   Range 7,995nm at 12.00 kts
   Bunker at max displacement = 1,728 tons

Complement:
   618 - 804

Cost:
   £3.207 million / $12.827 million

Distribution of weights at normal displacement:
   Armament: 283 tons, 2.1 %
   Armour: 2,275 tons, 17.1 %
      - Belts: 901 tons, 6.8 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 402 tons, 3.0 %
      - Armour Deck: 937 tons, 7.0 %
      - Conning Tower: 36 tons, 0.3 %
   Machinery: 3,726 tons, 28.0 %
   Hull, fittings & equipment: 5,188 tons, 39.0 %
   Fuel, ammunition & stores: 1,404 tons, 10.6 %
   Miscellaneous weights: 423 tons, 3.2 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     10,465 lbs / 4,747 Kg = 37.0 x 8.3 " / 210 mm shells or 1.3 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 3.3 ft / 1.0 m
   Roll period: 15.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.65
   Seaboat quality  (Average = 1.00): 1.34

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.550
   Length to Beam Ratio: 8.15 : 1
   'Natural speed' for length: 23.41 kts
   Power going to wave formation at top speed: 62 %
   Trim (Max stability = 0, Max steadiness = 100): 52
   Bow angle (Positive = bow angles forward): 18.05 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      30.18 ft / 9.20 m
      - Forecastle (15 %):   28.87 ft / 8.80 m
      - Mid (72 %):      28.22 ft / 8.60 m (20.34 ft / 6.20 m aft of break)
      - Quarterdeck (15 %):   20.67 ft / 6.30 m
      - Stern:      21.33 ft / 6.50 m
      - Average freeboard:   26.45 ft / 8.06 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 128.4 %
      - Above water (accommodation/working, high = better): 214.0 %
   Waterplane Area: 25,717 Square feet or 2,389 Square metres
   Displacement factor (Displacement / loading): 107 %
   Structure weight / hull surface area: 114 lbs/sq ft or 559 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.89
      - Longitudinal: 2.77
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

Misc Weights:
250t: Fire Control
25t: Long Range Wireless
24t: Torpedoes: 4 submerged tubes with 3 fish per tube
50t: Extra ventilation and crew comfort
50t: Extra command facilities
24t: Reserve

[Tanthalas]

I like that version (the 8.27" one) Rather alot actualy if Rohan was planing any 8" ships they would end up looking somthing like that (we arnt though 12" or 5.25" for cruiser types)

[mentat]

agree with Tanthalas - prefer the bigger gun version  :) - esp vs Hapsburg 190mm Kreuzers

- but any chance to add 2 more 210mm vs some of those sbmgd TTs (seem a lot) and/or maybe reduce to 31 knots?

[miketr]

I like the 210mm gunned ship better over all with the following reservations.

1) The total lack of secondaries is a bit of a problem.
2) I do wonder at the scale of protection it is light, its really only going to protect the ship from DD/TB sized weapons.
3) I liked the heavy mine suite of the other design.

Still if you were going to build the 150mm gun version vs the 210mm I would go with the 210.

Michael

[Guinness]

I'm still fiddling with a 210mm ship with better armor and an acceptable mineload... But here's a different 150mm design: more guns, less mines.

The attraction of this ship is it's versatility. It can carry and train 90 midshipmen in peacetime, and could also be used to transport 150 troops instead of the mines. So for going long distances and then causing trouble, it can do more than one thing.

1922 Large Cruiser, 2nd Caliphate Cruiser laid down 1922 (Engine 1916)

Displacement:
   11,940 t light; 12,335 t standard; 13,299 t normal; 14,070 t full load

Dimensions: Length overall / water x beam x draught
   557.76 ft / 547.90 ft x 67.26 ft x 22.97 ft (normal load)
   170.00 m / 167.00 m x 20.50 m  x 7.00 m

Armament:
      10 - 5.91" / 150 mm guns (5x2 guns), 102.98lbs / 46.71kg shells, 1922 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, majority aft, 3 raised mounts - superfiring
      2 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.88kg shells, 1922 Model
     Anti-aircraft guns in deck mounts
     on side, all amidships, all raised mounts - superfiring
      8 - 0.51" / 13.0 mm guns in single mounts, 0.07lbs / 0.03kg shells, 1922 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 1,034 lbs / 469 kg
   Shells per gun, main battery: 224
   12 - 21.0" / 533.4 mm submerged torpedo tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   2.95" / 75 mm   467.52 ft / 142.50 m   16.40 ft / 5.00 m
   Ends:   Unarmoured
   Upper:   2.36" / 60 mm   255.91 ft / 78.00 m   10.17 ft / 3.10 m
     Main Belt covers 131 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   3.94" / 100 mm   2.36" / 60 mm      2.95" / 75 mm
   2nd:         -      0.98" / 25 mm            -

   - Armour deck: 1.97" / 50 mm, Conning tower: 2.95" / 75 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 110,500 shp / 82,433 Kw = 32.00 kts
   Range 8,030nm at 12.00 kts
   Bunker at max displacement = 1,735 tons

Complement:
   618 - 804

Cost:
   £3.008 million / $12.031 million

Distribution of weights at normal displacement:
   Armament: 129 tons, 1.0 %
   Armour: 2,512 tons, 18.9 %
      - Belts: 1,196 tons, 9.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 344 tons, 2.6 %
      - Armour Deck: 937 tons, 7.0 %
      - Conning Tower: 36 tons, 0.3 %
   Machinery: 4,117 tons, 31.0 %
   Hull, fittings & equipment: 4,626 tons, 34.8 %
   Fuel, ammunition & stores: 1,359 tons, 10.2 %
   Miscellaneous weights: 555 tons, 4.2 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     9,835 lbs / 4,461 Kg = 95.5 x 5.9 " / 150 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 3.3 ft / 1.0 m
   Roll period: 15.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.29
   Seaboat quality  (Average = 1.00): 1.20

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.550
   Length to Beam Ratio: 8.15 : 1
   'Natural speed' for length: 23.41 kts
   Power going to wave formation at top speed: 63 %
   Trim (Max stability = 0, Max steadiness = 100): 58
   Bow angle (Positive = bow angles forward): 18.65 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      29.20 ft / 8.90 m
      - Forecastle (15 %):   27.89 ft / 8.50 m
      - Mid (71 %):      27.23 ft / 8.30 m (19.36 ft / 5.90 m aft of break)
      - Quarterdeck (15 %):   19.36 ft / 5.90 m
      - Stern:      20.01 ft / 6.10 m
      - Average freeboard:   25.36 ft / 7.73 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 130.9 %
      - Above water (accommodation/working, high = better): 205.4 %
   Waterplane Area: 25,717 Square feet or 2,389 Square metres
   Displacement factor (Displacement / loading): 108 %
   Structure weight / hull surface area: 105 lbs/sq ft or 512 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.91
      - Longitudinal: 2.33
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

Misc Weights:
100t: Fire Control
25t: Long Range Wireless
24t: Torpedoes: 4 submerged tubes with 3 fish per tube
60t: Extra ventillation and crew comfort
306t: Mines
40t: Reserve

[miketr]

I think the 150mm design is just too big for only ten 150mm weapons.

[Jefgte]

...Probably for the heavy Misc weight with 306t of minen & 3 raised mounts on 5.

IMO, too heavy for a minelayer. not realy well balanced.

Jef

[Guinness]

Well, that ship is supposed to be a lot more than a minelayer. It's a general purpose commerce raider, meant to tie up the enemy looking for it. The mines are just part of the havoc it might wreak.

Here's probably the last in this exploratory series. This ship has 8x210mm guns, arranged in super firing pairs forward, either all before the bridge, or a pair forward and a pair aft of the bridge (ie something like Tone, or something like N3).

Most of the secondaries are arranged aft, as are the mine handling facilities.

This is a little heavier, a little slower, and not much more heavily protected. I think what I've learned in all this is that the cost of carrying mines, at least according to SS2, is pretty high. The cost of cramming a ship like this in a type 2 dock is even higher.

1922 Large Cruiser, 2nd Caliphate Cruiser laid down 1922 (Engine 1916)

Displacement:
   13,000 t light; 13,539 t standard; 14,554 t normal; 15,367 t full load

Dimensions: Length overall / water x beam x draught
   557.74 ft / 547.90 ft x 75.46 ft x 22.82 ft (normal load)
   170.00 m / 167.00 m x 23.00 m  x 6.95 m

Armament:
     8 - 8.27" / 210 mm guns (4x2 guns), 282.57lbs / 128.17kg shells, 1922 Model
     Breech loading guns in turrets (on barbettes)
     on centreline, all forward, 2 raised mounts - superfiring
     4 - 4.72" / 120 mm guns (2x2 guns), 52.72lbs / 23.91kg shells, 1922 Model
     Quick firing guns in deck mounts with hoists
     on side, all amidships
     8 - 4.72" / 120 mm guns (4x2 guns), 52.72lbs / 23.91kg shells, 1922 Model
     Quick firing guns in deck mounts with hoists
     on centreline, all aft, 2 raised mounts - superfiring
     2 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.88kg shells, 1922 Model
     Anti-aircraft guns in deck mounts
     on centreline, all amidships, all raised mounts - superfiring
     6 - 0.51" / 13.0 mm guns in single mounts, 0.07lbs / 0.03kg shells, 1922 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 2,898 lbs / 1,314 kg
   Shells per gun, main battery: 147
   4 - 21.0" / 533.4 mm above water torpedoes

Armour:
  - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.94" / 100 mm   367.45 ft / 112.00 m   16.40 ft / 5.00 m
   Ends:   Unarmoured
     Main Belt covers 103 % of normal length

  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   4.72" / 120 mm   2.36" / 60 mm      3.94" / 100 mm
   2nd:   1.97" / 50 mm         -         1.57" / 40 mm
   3rd:   1.97" / 50 mm         -         1.57" / 40 mm
   4th:         -      0.98" / 25 mm            -

  - Armour deck: 1.77" / 45 mm, Conning tower: 2.95" / 75 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 96,000 shp / 71,616 Kw = 30.41 kts
   Range 8,000nm at 12.00 kts
   Bunker at max displacement = 1,828 tons

Complement:
   662 - 861

Cost:
   £3.436 million / $13.745 million

Distribution of weights at normal displacement:
   Armament: 362 tons, 2.5 %
   Armour: 2,620 tons, 18.0 %
      - Belts: 1,014 tons, 7.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 631 tons, 4.3 %
      - Armour Deck: 937 tons, 6.4 %
      - Conning Tower: 38 tons, 0.3 %
   Machinery: 3,577 tons, 24.6 %
   Hull, fittings & equipment: 5,939 tons, 40.8 %
   Fuel, ammunition & stores: 1,554 tons, 10.7 %
   Miscellaneous weights: 502 tons, 3.4 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     18,639 lbs / 8,455 Kg = 66.0 x 8.3 " / 210 mm shells or 1.9 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 3.9 ft / 1.2 m
   Roll period: 16.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.60
   Seaboat quality  (Average = 1.00): 1.35

Hull form characteristics:
   Hull has low quarterdeck
   Block coefficient: 0.540
   Length to Beam Ratio: 7.26 : 1
   'Natural speed' for length: 23.41 kts
   Power going to wave formation at top speed: 61 %
   Trim (Max stability = 0, Max steadiness = 100): 52
   Bow angle (Positive = bow angles forward): 17.70 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      30.84 ft / 9.40 m
      - Forecastle (15 %):   29.53 ft / 9.00 m
      - Mid (50 %):      28.87 ft / 8.80 m
      - Quarterdeck (15 %):   19.36 ft / 5.90 m (27.23 ft / 8.30 m before break)
      - Stern:      19.36 ft / 5.90 m
      - Average freeboard:   27.45 ft / 8.37 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 103.0 %
      - Above water (accommodation/working, high = better): 219.7 %
   Waterplane Area: 28,585 Square feet or 2,656 Square metres
   Displacement factor (Displacement / loading): 110 %
   Structure weight / hull surface area: 127 lbs/sq ft or 619 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.89
      - Longitudinal: 2.85
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

Misc Weights:
250t: Fire Control
25t: Long Range Wireless
24t: Torpedoes: 4 submerged tubes with 3 fish per tube
60t: Extra ventilation and crew comfort
102t: Mines
41t: Reserve

[mentat]

i'd be inclined to split the roles - smaller fast minelayer - something like an early Manxman - and nice spanking Heavy Cruiser - like a Trieste - will add a certain style and panache to the current Caliphate line up  :)

[mentat]

- a spanking Heavy Cruiser ....

  Heavy Gunship Cruiser laid down 1918

Displacement:
   13,103 t light; 13,760 t standard; 14,846 t normal; 15,715 t full load

Dimensions: Length overall / water x beam x draught
   585.00 ft / 585.00 ft x 76.00 ft x 21.25 ft (normal load)
   178.31 m / 178.31 m x 23.16 m  x 6.48 m

Armament:
      10 - 8.66" / 220 mm guns (4 mounts), 325.00lbs / 147.42kg shells, 1918 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      12 - 5.12" / 130 mm guns (6x2 guns), 70.00lbs / 31.75kg shells, 1918 Model
     Breech loading guns in deck mounts with hoists
     on side, all amidships
      4 - 2.56" / 65.0 mm guns in single mounts, 8.50lbs / 3.86kg shells, 1918 Model
     Breech loading guns in deck mounts
     on side, evenly spread, all raised mounts
      24 - 1.00" / 25.4 mm guns (6x4 guns), 0.50lbs / 0.23kg shells, 1918 Model
     Breech loading guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 4,136 lbs / 1,876 kg
   Shells per gun, main battery: 150
   8 - 22.0" / 558.8 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   4.50" / 114 mm   420.00 ft / 128.02 m   10.04 ft / 3.06 m
   Ends:   Unarmoured
     Main Belt covers 110 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   5.00" / 127 mm   2.00" / 51 mm      4.25" / 108 mm
   2nd:   1.50" / 38 mm   0.70" / 18 mm      2.00" / 51 mm
   3rd:   0.80" / 20 mm   0.50" / 13 mm            -
   4th:   0.50" / 13 mm         -               -

   - Armour deck: 1.80" / 46 mm, Conning tower: 6.00" / 152 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 102,596 shp / 76,537 Kw = 31.05 kts
   Range 9,000nm at 12.00 kts
   Bunker at max displacement = 1,955 tons

Complement:
   672 - 874

Cost:
   £2.814 million / $11.257 million

Distribution of weights at normal displacement:
   Armament: 512 tons, 3.5 %
   Armour: 2,568 tons, 17.3 %
      - Belts: 796 tons, 5.4 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 660 tons, 4.4 %
      - Armour Deck: 1,033 tons, 7.0 %
      - Conning Tower: 78 tons, 0.5 %
   Machinery: 3,701 tons, 24.9 %
   Hull, fittings & equipment: 5,972 tons, 40.2 %
   Fuel, ammunition & stores: 1,743 tons, 11.7 %
   Miscellaneous weights: 350 tons, 2.4 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     14,855 lbs / 6,738 Kg = 45.7 x 8.7 " / 220 mm shells or 1.7 torpedoes
   Stability (Unstable if below 1.00): 1.19
   Metacentric height 4.6 ft / 1.4 m
   Roll period: 14.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.46
   Seaboat quality  (Average = 1.00): 0.93

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.550
   Length to Beam Ratio: 7.70 : 1
   'Natural speed' for length: 24.19 kts
   Power going to wave formation at top speed: 60 %
   Trim (Max stability = 0, Max steadiness = 100): 54
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      26.61 ft / 8.11 m
      - Forecastle (20 %):   24.93 ft / 7.60 m
      - Mid (50 %):      24.93 ft / 7.60 m (16.93 ft / 5.16 m aft of break)
      - Quarterdeck (15 %):   16.93 ft / 5.16 m
      - Stern:      16.93 ft / 5.16 m
      - Average freeboard:   21.06 ft / 6.42 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 110.3 %
      - Above water (accommodation/working, high = better): 156.7 %
   Waterplane Area: 31,028 Square feet or 2,883 Square metres
   Displacement factor (Displacement / loading): 103 %
   Structure weight / hull surface area: 132 lbs/sq ft or 645 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.48
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent
   Poor seaboat, wet and uncomfortable, reduced performance in heavy weather


- Low Seaboat at 31 knots - but OK in Med etc and 30% more Firepower ...

[Guinness]

Still trying to figure out just what sort of Navy the Caliphate will have...

This exercise is based on the idea of building a cohesive "battleline" around Yavuz and Süleyman. So the main parameters were 25 knots, a type 2 dock, and the new 305mm gun, while also introducing superfiring.

2nd Caliphate Battleship (10x305mm), 2nd Caliphate  Battleship laid down 1922 (Engine 1916)

Displacement:
   21,200 t light; 22,343 t standard; 23,477 t normal; 24,385 t full load

Dimensions: Length overall / water x beam x draught
   557.75 ft / 551.18 ft x 91.86 ft x 27.74 ft (normal load)
   170.00 m / 168.00 m x 28.00 m  x 8.46 m

Armament:
      10 - 12.01" / 305 mm guns (3 mounts), 890.67lbs / 404.00kg shells, 1922 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, majority aft, 4 raised guns - superfiring
      12 - 5.91" / 150 mm guns (6x2 guns), 102.98lbs / 46.71kg shells, 1922 Model
     Quick firing guns in deck mounts with hoists
     on centreline, all amidships
      2 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.89kg shells, 1922 Model
     Anti-aircraft guns in deck mounts
     on centreline, all amidships, all raised mounts - superfiring
      8 - 0.51" / 13.0 mm guns in single mounts, 0.07lbs / 0.03kg shells, 1922 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 10,147 lbs / 4,603 kg
   Shells per gun, main battery: 117

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   9.84" / 250 mm   341.21 ft / 104.00 m   16.40 ft / 5.00 m
   Ends:   4.72" / 120 mm   209.97 ft / 64.00 m   16.40 ft / 5.00 m
   Upper:   4.72" / 120 mm   341.21 ft / 104.00 m   8.86 ft / 2.70 m
     Main Belt covers 95 % of normal length

   - Torpedo Bulkhead:
      1.57" / 40 mm   341.21 ft / 104.00 m   32.81 ft / 10.00 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   11.8" / 300 mm   4.72" / 120 mm      9.84" / 250 mm
   3rd:   1.97" / 50 mm         -         1.57" / 40 mm
   4th:         -      0.98" / 25 mm            -
   5th:   0.51" / 13 mm         -               -

   - Armour deck: 2.36" / 60 mm, Conning tower: 11.42" / 290 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 61,000 shp / 45,506 Kw = 25.02 kts
   Range 6,550nm at 12.00 kts
   Bunker at max displacement = 2,042 tons

Complement:
   947 - 1,232

Cost:
   £5.726 million / $22.902 million

Distribution of weights at normal displacement:
   Armament: 1,237 tons, 5.3 %
   Armour: 7,922 tons, 33.7 %
      - Belts: 3,694 tons, 15.7 %
      - Torpedo bulkhead: 652 tons, 2.8 %
      - Armament: 1,778 tons, 7.6 %
      - Armour Deck: 1,596 tons, 6.8 %
      - Conning Tower: 202 tons, 0.9 %
   Machinery: 2,273 tons, 9.7 %
   Hull, fittings & equipment: 9,307 tons, 39.6 %
   Fuel, ammunition & stores: 2,277 tons, 9.7 %
   Miscellaneous weights: 461 tons, 2.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     33,841 lbs / 15,350 Kg = 39.1 x 12.0 " / 305 mm shells or 5.5 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 5.3 ft / 1.6 m
   Roll period: 16.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 53 %
         - Recoil effect (Restricted arc if above 1.00): 0.70
   Seaboat quality  (Average = 1.00): 1.20

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.585
   Length to Beam Ratio: 6.00 : 1
   'Natural speed' for length: 23.48 kts
   Power going to wave formation at top speed: 55 %
   Trim (Max stability = 0, Max steadiness = 100): 44
   Bow angle (Positive = bow angles forward): 13.25 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      27.89 ft / 8.50 m
      - Forecastle (15 %):   25.92 ft / 7.90 m
      - Mid (69 %):      24.93 ft / 7.60 m (17.06 ft / 5.20 m aft of break)
      - Quarterdeck (15 %):   17.39 ft / 5.30 m
      - Stern:      17.72 ft / 5.40 m
      - Average freeboard:   23.08 ft / 7.04 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 94.6 %
      - Above water (accommodation/working, high = better): 172.6 %
   Waterplane Area: 36,516 Square feet or 3,392 Square metres
   Displacement factor (Displacement / loading): 103 %
   Structure weight / hull surface area: 177 lbs/sq ft or 866 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.92
      - Longitudinal: 2.09
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent
   Good seaboat, rides out heavy weather easily

Misc Weight:
250t: Fire Control
50t: Crew Comfort
100t: Flag Facilities
61t: Reserve