Ottoman Light Cruiser Design Contest

[miketr]

The Ottoman Empire is looking to build two large light cruisers in 1917.

Design Details

Max of 7,250 tons light displacement
To fit into a type 2 slipway
1916 oil fired engines
Use 150mm guns in twin mounts
At least 30 knots

[maddox]

France can offer that in a pinch.

A sleightly redesigned Demarce IV will do.  But France will have to buy the 150mm guns.
Oor else substitute those for the 140 or 165mm guns.

[Korpen]

Just the get a clarification, are the Ottomans looking for a design to build themself, or do they want someone to build the ships for them?

[miketr]

The Ottomans will be building these themselves.  I have gotten better designs for the Ottomans when I farm them out instead of comming up with my own.  The design details are based upon their tech and economy (they have 7.25 BP a half of income).

[Korpen]

The Ottomans will be building these themselves.  I have gotten better designs for the Ottomans when I farm them out instead of comming up with my own.  The design details are based upon their tech and economy (they have 7.25 BP a half of income).

What I thought then.
I do not have Springshrap close at hand atm, but would offer an older design as a starting point to see if the concept is interesting: Javalove http://www.navalism.org/index.php?topic=2234.msg24712#msg24712
With more modern engines there is room for improvements if any area desired.

[miketr]

Korpen that design is roughly what I am looking for.  I would like 4 turrets on the center line and perhaps single 150's on the wings.   Like that one large numbers of mines is also a plus.  Over all use the displacement (about 1,000 tons heavier 6,100 vs. 7,250) to get extra speed.

[Desertfox]

I'll try to get something up once I get back home. In the meantime NS will soon be fielding a design very similar to the WW Columbias:
http://www.wesworld.jk-clan.de/thread.php?threadid=3232&sid=b177fc7ec2e33f48c2e4966adb776b0b

[miketr]

Roughly what I am looking for foxy roughly 

[Sachmle]

But can Fox's Olympia be done w/ 1916 engines as apposed to the 1925 ones used to sim it?

[TexanCowboy]

The Romanian can offer this ridiculously underweight design.  :D



Sultun Osman, Ottoman Empire Light Cruiser laid down 1917

Displacement:
   4,644 t light; 4,910 t standard; 6,364 t normal; 7,528 t full load

Dimensions: Length overall / water x beam x draught
   461.84 ft / 450.00 ft x 45.00 ft x 20.00 ft (normal load)
   140.77 m / 137.16 m x 13.72 m  x 6.10 m

Armament:
      8 - 5.91" / 150 mm guns (4x2 guns), 102.98lbs / 46.71kg shells, 1917 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread
      2 - 5.91" / 150 mm guns (1x2 guns), 102.98lbs / 46.71kg shells, 1917 Model
     Breech loading guns in a turret (on a barbette)
     on centreline amidships
      10 - 2.99" / 76.0 mm guns in single mounts, 13.39lbs / 6.08kg shells, 1917 Model
     Breech loading guns in casemate mounts
     on side, evenly spread
      2 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1917 Model
     Anti-aircraft guns in deck mounts
     on centreline, evenly spread
      20 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1917 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 1,166 lbs / 529 kg
   Shells per gun, main battery: 200
   4 - 20.0" / 508 mm above water torpedoes, 1 - 20.0" / 508 mm submerged torpedo tubes

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   4.00" / 102 mm   1.00" / 25 mm      1.00" / 25 mm
   2nd:   4.00" / 102 mm   1.00" / 25 mm      1.00" / 25 mm
   3rd:   2.00" / 51 mm         -               -

   - Armour deck: 1.00" / 25 mm, Conning tower: 5.00" / 127 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 48,000 shp / 35,808 Kw = 28.82 kts
   Range 10,000nm at 16.30 kts
   Bunker at max displacement = 2,618 tons

Complement:
   356 - 463

Cost:
   £0.966 million / $3.864 million

Distribution of weights at normal displacement:
   Armament: 146 tons, 2.3 %
   Armour: 454 tons, 7.1 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 155 tons, 2.4 %
      - Armour Deck: 261 tons, 4.1 %
      - Conning Tower: 37 tons, 0.6 %
   Machinery: 1,760 tons, 27.6 %
   Hull, fittings & equipment: 2,135 tons, 33.5 %
   Fuel, ammunition & stores: 1,721 tons, 27.0 %
   Miscellaneous weights: 150 tons, 2.4 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     5,738 lbs / 2,603 Kg = 55.7 x 5.9 " / 150 mm shells or 1.0 torpedoes
   Stability (Unstable if below 1.00): 1.24
   Metacentric height 2.2 ft / 0.7 m
   Roll period: 12.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 58 %
         - Recoil effect (Restricted arc if above 1.00): 0.58
   Seaboat quality  (Average = 1.00): 1.16

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.550
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 21.21 kts
   Power going to wave formation at top speed: 60 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 5.00 degrees
   Stern overhang: 10.00 ft / 3.05 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      21.00 ft / 6.40 m
      - Forecastle (20 %):   17.00 ft / 5.18 m
      - Mid (50 %):      17.00 ft / 5.18 m
      - Quarterdeck (15 %):   17.00 ft / 5.18 m
      - Stern:      17.00 ft / 5.18 m
      - Average freeboard:   17.32 ft / 5.28 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 113.0 %
      - Above water (accommodation/working, high = better): 112.7 %
   Waterplane Area: 14,132 Square feet or 1,313 Square metres
   Displacement factor (Displacement / loading): 120 %
   Structure weight / hull surface area: 82 lbs/sq ft or 399 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.92
      - Longitudinal: 2.07
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is adequate

20 tons for torpedoes
100 tons for mines
30 tons for depth charges

[Sachmle]

Brandenburg offers the following:

Displacement:
   7,250 t light; 7,539 t standard; 8,445 t normal; 9,170 t full load

Dimensions: Length overall / water x beam x draught
   557.74 ft / 550.79 ft x 62.86 ft x 16.40 ft (normal load)
   170.00 m / 167.88 m x 19.16 m  x 5.00 m

Armament:
      8 - 5.91" / 150 mm guns (4x2 guns), 102.98lbs / 46.71kg shells, 1908 Model
     Breech loading guns in deck mounts with hoists
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      2 - 2.95" / 75.0 mm guns in single mounts, 13.23lbs / 6.00kg shells, 1915 Model
     Anti-aircraft guns in deck mounts
     on side, all amidships, all raised mounts - superfiring
      4 - 0.59" / 15.0 mm guns in single mounts, 0.10lbs / 0.05kg shells, 1912 Model
     Machine guns in deck mounts
     on side ends, evenly spread, all raised mounts - superfiring
   Weight of broadside 851 lbs / 386 kg
   Shells per gun, main battery: 250
   6 - 19.7" / 500 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   2.95" / 75 mm   464.24 ft / 141.50 m   9.88 ft / 3.01 m
   Ends:   Unarmoured
     Main Belt covers 130 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.97" / 50 mm         -         1.97" / 50 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 81,326 shp / 60,669 Kw = 32.00 kts
   Range 6,000nm at 15.00 kts
   Bunker at max displacement = 1,632 tons

Complement:
   439 - 572

Cost:
   £1.395 million / $5.580 million

Distribution of weights at normal displacement:
   Armament: 106 tons, 1.3 %
   Armour: 596 tons, 7.1 %
      - Belts: 546 tons, 6.5 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 50 tons, 0.6 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 3,030 tons, 35.9 %
   Hull, fittings & equipment: 3,318 tons, 39.3 %
   Fuel, ammunition & stores: 1,195 tons, 14.1 %
   Miscellaneous weights: 200 tons, 2.4 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     7,169 lbs / 3,252 Kg = 69.6 x 5.9 " / 150 mm shells or 1.1 torpedoes
   Stability (Unstable if below 1.00): 1.24
   Metacentric height 3.7 ft / 1.1 m
   Roll period: 13.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.22
   Seaboat quality  (Average = 1.00): 1.04

Hull form characteristics:
   Hull has raised forecastle, rise forward of midbreak
   Block coefficient: 0.520
   Length to Beam Ratio: 8.76 : 1
   'Natural speed' for length: 23.47 kts
   Power going to wave formation at top speed: 59 %
   Trim (Max stability = 0, Max steadiness = 100): 67
   Bow angle (Positive = bow angles forward): 14.00 degrees
   Stern overhang: -4.10 ft / -1.25 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      27.89 ft / 8.50 m
      - Forecastle (25 %):   26.25 ft / 8.00 m (22.97 ft / 7.00 m aft of break)
      - Mid (60 %):      22.97 ft / 7.00 m (14.76 ft / 4.50 m aft of break)
      - Quarterdeck (15 %):   14.76 ft / 4.50 m
      - Stern:      14.76 ft / 4.50 m
      - Average freeboard:   20.67 ft / 6.30 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 129.2 %
      - Above water (accommodation/working, high = better): 178.4 %
   Waterplane Area: 23,505 Square feet or 2,184 Square metres
   Displacement factor (Displacement / loading): 110 %
   Structure weight / hull surface area: 93 lbs/sq ft or 456 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.43
      - 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

Misc weight can be used to fit FC if available as well as a LR W/T and 50 mines plus 12t for 2 loads of torpedoes. Also a 13t reserve for either more mines or torpedoes.

[ledeper]

The ESC offers:
Improved County-Class, BCS Ligth Cruiser laid down 1916

Displacement:
   6.167 t light; 6.389 t standard; 6.969 t normal; 7.432 t full load

Dimensions: Length overall / water x beam x draught
   512,90 ft / 508,53 ft x 49,21 ft x 21,33 ft (normal load)
   156,33 m / 155,00 m x 15,00 m  x 6,50 m

Armament:
      8 - 5,91" / 150 mm guns (4x2 guns), 102,98lbs / 46,71kg shells, 1916 Model
     Quick firing guns in deck mounts with hoists
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      4 - 3,94" / 100 mm guns in single mounts, 30,51lbs / 13,84kg shells, 1916 Model
     Quick firing guns in deck mounts
     on side, all amidships
      4 - 1,57" / 40,0 mm guns in single mounts, 1,95lbs / 0,88kg shells, 1916 Model
     Quick firing guns in deck mounts
     on side, evenly spread
   Weight of broadside 954 lbs / 433 kg
   Shells per gun, main battery: 150
   4 - 21,0" / 533,4 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3,94" / 100 mm   369,91 ft / 112,75 m   8,43 ft / 2,57 m
   Ends:   Unarmoured
   Upper:   1,97" / 50 mm   330,54 ft / 100,75 m   8,01 ft / 2,44 m
     Main Belt covers 112 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0,98" / 25 mm   0,98" / 25 mm      0,98" / 25 mm

   - Armour deck: 1,97" / 50 mm, Conning tower: 5,91" / 150 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 3 shafts, 54.179 shp / 40.417 Kw = 30,00 kts
   Range 5.000nm at 14,00 kts
   Bunker at max displacement = 1.043 tons

Complement:
   380 - 495

Cost:
   £0,980 million / $3,918 million

Distribution of weights at normal displacement:
   Armament: 119 tons, 1,7 %
   Armour: 1.382 tons, 19,8 %
      - Belts: 716 tons, 10,3 %
      - Torpedo bulkhead: 0 tons, 0,0 %
      - Armament: 35 tons, 0,5 %
      - Armour Deck: 585 tons, 8,4 %
      - Conning Tower: 46 tons, 0,7 %
   Machinery: 2.019 tons, 29,0 %
   Hull, fittings & equipment: 2.398 tons, 34,4 %
   Fuel, ammunition & stores: 801 tons, 11,5 %
   Miscellaneous weights: 250 tons, 3,6 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     6.171 lbs / 2.799 Kg = 59,9 x 5,9 " / 150 mm shells or 1,1 torpedoes
   Stability (Unstable if below 1.00): 1,16
   Metacentric height 2,3 ft / 0,7 m
   Roll period: 13,7 seconds
   Steadiness   - As gun platform (Average = 50 %): 56 %
         - Recoil effect (Restricted arc if above 1.00): 0,41
   Seaboat quality  (Average = 1.00): 1,12

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,457
   Length to Beam Ratio: 10,33 : 1
   'Natural speed' for length: 22,55 kts
   Power going to wave formation at top speed: 55 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 10,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      24,80 ft / 7,56 m
      - Forecastle (20 %):   15,78 ft / 4,81 m
      - Mid (50 %):      15,78 ft / 4,81 m
      - Quarterdeck (15 %):   15,78 ft / 4,81 m
      - Stern:      15,78 ft / 4,81 m
      - Average freeboard:   16,50 ft / 5,03 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 111,3 %
      - Above water (accommodation/working, high = better): 113,0 %
   Waterplane Area: 16.056 Square feet or 1.492 Square metres
   Displacement factor (Displacement / loading): 105 %
   Structure weight / hull surface area: 85 lbs/sq ft or 417 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,96
      - Longitudinal: 1,54
      - Overall: 1,00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is adequate



Misc Weigth:
100 t Fc
100t mines
L/R WL  25 t
Reserve 25t

[Korpen]

So, updated in size and year.
Priority have been put on range on payload rather then armour or firepower.
In most scenarios the Ottoman navy will be outnumbered and outgunned no matter what, so I think it is better to try and play to other strengths. The ship is an excellent offensive minelayer, and her large bunkers allow her to maintain a high-speed mission profile in such operations, as well as allowing her to conduct raiding. If not used for mines the mine hangars can be used to carry supplies (for example across a blockade) for the army, or equipment and supplies for torpedo boats. In the later case her large bunkerage could also allow her to function a bit like a tender/supply ship for them for a period, as well as a leader in combat.
On top of this she is a pretty good light cruiser.

Gun layout is like "Sweet love", but with with one gun in front of the rear mast at deck level. the other gun is in the side gun position, but on the centerline at deck level.

Barbarossa, Turky Cruiser laid down 1916

Displacement:
   7 250 t light; 7 568 t standard; 8 859 t normal; 9 891 t full load

Dimensions: Length overall / water x beam x draught
   541,34 ft / 541,34 ft x 55,77 ft x 20,96 ft (normal load)
   165,00 m / 165,00 m x 17,00 m  x 6,39 m

Armament:
     10 - 5,91" / 150 mm guns (5x2 guns), 99,21lbs / 45,00kg shells, 1916 Model
     Breech loading guns in deck mounts with hoists
     on centreline, evenly spread, 1 raised mount
     1 - 3,46" / 88,0 mm guns in single mounts, 19,84lbs / 9,00kg shells, 1916 Model
     Anti-aircraft gun in deck mount
     on side amidships, 1 raised gun
   Weight of broadside 1 012 lbs / 459 kg
   Shells per gun, main battery: 250
   4 - 17,7" / 450 mm above water torpedoes

Armour:
  - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   2,95" / 75 mm   410,11 ft / 125,00 m   11,48 ft / 3,50 m
   Ends:   Unarmoured
     Main Belt covers 117 % of normal length

  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   2,95" / 75 mm   0,98" / 25 mm      1,97" / 50 mm

  - Armour deck: 1,38" / 35 mm, Conning tower: 4,92" / 125 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 71 418 shp / 53 278 Kw = 31,00 kts
   Range 14 000nm at 12,00 kts
   Bunker at max displacement = 2 323 tons

Complement:
   456 - 593

Cost:
   £1,205 million / $4,821 million

Distribution of weights at normal displacement:
   Armament: 131 tons, 1,5 %
   Armour: 1 190 tons, 13,4 %
      - Belts: 566 tons, 6,4 %
      - Torpedo bulkhead: 0 tons, 0,0 %
      - Armament: 70 tons, 0,8 %
      - Armour Deck: 508 tons, 5,7 %
      - Conning Tower: 45 tons, 0,5 %
   Machinery: 2 661 tons, 30,0 %
   Hull, fittings & equipment: 2 917 tons, 32,9 %
   Fuel, ammunition & stores: 1 609 tons, 18,2 %
   Miscellaneous weights: 351 tons, 4,0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     7 557 lbs / 3 428 Kg = 73,4 x 5,9 " / 150 mm shells or 1,2 torpedoes
   Stability (Unstable if below 1.00): 1,14
   Metacentric height 2,7 ft / 0,8 m
   Roll period: 14,3 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0,32
   Seaboat quality  (Average = 1.00): 1,02

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0,490
   Length to Beam Ratio: 9,71 : 1
   'Natural speed' for length: 23,27 kts
   Power going to wave formation at top speed: 57 %
   Trim (Max stability = 0, Max steadiness = 100): 70
   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:      25,43 ft / 7,75 m
      - Forecastle (20 %):   18,86 ft / 5,75 m
      - Mid (69 %):      18,86 ft / 5,75 m (10,66 ft / 3,25 m aft of break)
      - Quarterdeck (15 %):   10,66 ft / 3,25 m
      - Stern:      10,66 ft / 3,25 m
      - Average freeboard:   16,85 ft / 5,14 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 114,0 %
      - Above water (accommodation/working, high = better): 131,2 %
   Waterplane Area: 19 936 Square feet or 1 852 Square metres
   Displacement factor (Displacement / loading): 112 %
   Structure weight / hull surface area: 90 lbs/sq ft or 441 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,97
      - Longitudinal: 1,29
      - 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

- 100 on FC
- 25 ton large radio
- 10 ton torpedos
- 15 ton extra fuel pumps and quarters
- 200 ton mines

8540nm @ 15kts
4250nm @ 20kts
1240nm @ 31kts

[Desertfox]

Quick and Dirty design replaced with improved one with Ottoman sized weapons.


Aurora class, New Switzerland Designed Cruiser laid down 1916

Displacement:
   7,000 t light; 7,368 t standard; 8,937 t normal; 10,192 t full load

Dimensions: Length overall / water x beam x draught
   550.00 ft / 550.00 ft x 55.00 ft x 22.00 ft (normal load)
   167.64 m / 167.64 m x 16.76 m  x 6.71 m

Armament:
      10 - 5.91" / 150 mm guns (5x2 guns), 102.98lbs / 46.71kg shells, 1916 Model
     Breech loading guns in deck mounts with hoists
     on centreline ends, majority aft, 2 raised mounts - superfiring
      8 - 2.95" / 75.0 mm guns in single mounts, 12.87lbs / 5.84kg shells, 1916 Model
     Breech loading guns in deck mounts
     on side, evenly spread
      8 - 0.59" / 15.0 mm guns (4x2 guns), 0.10lbs / 0.05kg shells, 1916 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 1,134 lbs / 514 kg
   Shells per gun, main battery: 290
   12 - 17.7" / 450 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   4.13" / 105 mm   364.00 ft / 110.95 m   9.00 ft / 2.74 m
   Ends:   Unarmoured
     Main Belt covers 102 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.57" / 40 mm   0.98" / 25 mm      0.98" / 25 mm

   - Armour deck: 1.57" / 40 mm, Conning tower: 4.13" / 105 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 61,743 shp / 46,060 Kw = 30.00 kts
   Range 5,200nm at 20.00 kts
   Bunker at max displacement = 2,824 tons

Complement:
   459 - 597

Cost:
   £1.123 million / $4.491 million

Distribution of weights at normal displacement:
   Armament: 142 tons, 1.6 %
   Armour: 1,220 tons, 13.7 %
      - Belts: 561 tons, 6.3 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 51 tons, 0.6 %
      - Armour Deck: 570 tons, 6.4 %
      - Conning Tower: 38 tons, 0.4 %
   Machinery: 2,300 tons, 25.7 %
   Hull, fittings & equipment: 2,998 tons, 33.5 %
   Fuel, ammunition & stores: 1,936 tons, 21.7 %
   Miscellaneous weights: 340 tons, 3.8 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     9,919 lbs / 4,499 Kg = 96.3 x 5.9 " / 150 mm shells or 1.4 torpedoes
   Stability (Unstable if below 1.00): 1.21
   Metacentric height 2.9 ft / 0.9 m
   Roll period: 13.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.37
   Seaboat quality  (Average = 1.00): 1.22

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.470
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 23.45 kts
   Power going to wave formation at top speed: 54 %
   Trim (Max stability = 0, Max steadiness = 100): 58
   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:      27.00 ft / 8.23 m
      - Forecastle (20 %):   19.00 ft / 5.79 m
      - Mid (40 %):      19.00 ft / 5.79 m
      - Quarterdeck (15 %):   14.00 ft / 4.27 m
      - Stern:      14.00 ft / 4.27 m
      - Average freeboard:   17.77 ft / 5.41 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 101.4 %
      - Above water (accommodation/working, high = better): 113.3 %
   Waterplane Area: 19,624 Square feet or 1,823 Square metres
   Displacement factor (Displacement / loading): 123 %
   Structure weight / hull surface area: 91 lbs/sq ft or 443 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.42
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is adequate
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

[Desertfox]

A number of slight changes and an extra knot in speed.


Aurora class, New Switzerland Designed Cruiser laid down 1916

Displacement:
   7,250 t light; 7,608 t standard; 9,140 t normal; 10,365 t full load

Dimensions: Length overall / water x beam x draught
   550.00 ft / 550.00 ft x 55.00 ft x 22.50 ft (normal load)
   167.64 m / 167.64 m x 16.76 m  x 6.86 m

Armament:
      10 - 5.91" / 150 mm guns (5x2 guns), 102.98lbs / 46.71kg shells, 1916 Model
     Breech loading guns in deck mounts with hoists
     on centreline ends, majority aft, 2 raised mounts - superfiring
      8 - 2.95" / 75.0 mm guns in single mounts, 12.87lbs / 5.84kg shells, 1916 Model
     Breech loading guns in deck mounts
     on side, evenly spread
      8 - 0.59" / 15.0 mm guns (4x2 guns), 0.10lbs / 0.05kg shells, 1916 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 1,134 lbs / 514 kg
   Shells per gun, main battery: 270
   12 - 17.7" / 450 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.94" / 100 mm   400.26 ft / 122.00 m   9.00 ft / 2.74 m
   Ends:   Unarmoured
     Main Belt covers 112 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.18" / 30 mm   0.79" / 20 mm      0.79" / 20 mm

   - Armour deck: 1.18" / 30 mm, Conning tower: 3.94" / 100 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 71,439 shp / 53,294 Kw = 31.00 kts
   Range 5,000nm at 20.00 kts
   Bunker at max displacement = 2,757 tons

Complement:
   466 - 607

Cost:
   £1.220 million / $4.879 million

Distribution of weights at normal displacement:
   Armament: 142 tons, 1.6 %
   Armour: 1,085 tons, 11.9 %
      - Belts: 579 tons, 6.3 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 40 tons, 0.4 %
      - Armour Deck: 429 tons, 4.7 %
      - Conning Tower: 37 tons, 0.4 %
   Machinery: 2,662 tons, 29.1 %
   Hull, fittings & equipment: 3,041 tons, 33.3 %
   Fuel, ammunition & stores: 1,890 tons, 20.7 %
   Miscellaneous weights: 320 tons, 3.5 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     8,271 lbs / 3,752 Kg = 80.3 x 5.9 " / 150 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.20
   Metacentric height 2.8 ft / 0.9 m
   Roll period: 13.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.37
   Seaboat quality  (Average = 1.00): 1.13

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.470
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 23.45 kts
   Power going to wave formation at top speed: 55 %
   Trim (Max stability = 0, Max steadiness = 100): 62
   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:      27.00 ft / 8.23 m
      - Forecastle (20 %):   19.00 ft / 5.79 m
      - Mid (40 %):      19.00 ft / 5.79 m
      - Quarterdeck (15 %):   14.00 ft / 4.27 m
      - Stern:      14.00 ft / 4.27 m
      - Average freeboard:   17.77 ft / 5.41 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 111.4 %
      - Above water (accommodation/working, high = better): 111.6 %
   Waterplane Area: 19,624 Square feet or 1,823 Square metres
   Displacement factor (Displacement / loading): 116 %
   Structure weight / hull surface area: 92 lbs/sq ft or 447 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.44
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is adequate
   Ship has slow, easy roll, a good, steady gun platform