Kambyses, Persian CDBB

[ledeper]

Replacement for Cyrus the Great with Cyrus the Great`s 10" guns reused in a twin deck mount

Kambyses, Persia CDBB laid down 1913 (Engine 1906)

Displacement:
   4.502 t light; 4.800 t standard; 5.370 t normal; 5.826 t full load

Dimensions: Length overall / water x beam x draught
   291,90 ft / 288,71 ft x 49,21 ft x 19,69 ft (normal load)
   88,97 m / 88,00 m x 15,00 m  x 6,00 m

Armament:
      4 - 10,00" / 254 mm guns (2x2 guns), 462,50lbs / 209,79kg shells, 1885 Model
     Breech loading guns in deck mounts
     on centreline ends, evenly spread
      10 - 6,00" / 152 mm guns in single mounts, 108,00lbs / 48,99kg shells, 1913 Model
     Breech loading guns in deck mounts
     on side, all amidships
      2 - 1,57" / 40,0 mm guns in single mounts, 1,95lbs / 0,89kg shells, 1913 Model
     Breech loading guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 2.934 lbs / 1.331 kg
   Shells per gun, main battery: 110

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   9,84" / 250 mm   204,07 ft / 62,20 m   8,43 ft / 2,57 m
   Ends:   1,97" / 50 mm   101,02 ft / 30,79 m   8,43 ft / 2,57 m
   Upper:   3,94" / 100 mm   187,66 ft / 57,20 m   8,01 ft / 2,44 m
     Main Belt covers 109 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   9,84" / 250 mm   5,91" / 150 mm            -

   - Armour deck: 1,97" / 50 mm, Conning tower: 7,87" / 200 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 3 shafts, 13.470 shp / 10.048 Kw = 20,00 kts
   Range 5.000nm at 12,00 kts
   Bunker at max displacement = 1.026 tons

Complement:
   313 - 407

Cost:
   £0,642 million / $2,566 million

Distribution of weights at normal displacement:
   Armament: 367 tons, 6,8 %
   Armour: 1.741 tons, 32,4 %
      - Belts: 1.060 tons, 19,7 %
      - Torpedo bulkhead: 0 tons, 0,0 %
      - Armament: 225 tons, 4,2 %
      - Armour Deck: 404 tons, 7,5 %
      - Conning Tower: 52 tons, 1,0 %
   Machinery: 875 tons, 16,3 %
   Hull, fittings & equipment: 1.370 tons, 25,5 %
   Fuel, ammunition & stores: 868 tons, 16,2 %
   Miscellaneous weights: 150 tons, 2,8 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     4.841 lbs / 2.196 Kg = 9,7 x 10,0 " / 254 mm shells or 1,0 torpedoes
   Stability (Unstable if below 1.00): 1,31
   Metacentric height 2,8 ft / 0,9 m
   Roll period: 12,4 seconds
   Steadiness   - As gun platform (Average = 50 %): 52 %
         - Recoil effect (Restricted arc if above 1.00): 0,47
   Seaboat quality  (Average = 1.00): 1,03

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,672
   Length to Beam Ratio: 5,87 : 1
   'Natural speed' for length: 16,99 kts
   Power going to wave formation at top speed: 63 %
   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:      18,04 ft / 5,50 m
      - Forecastle (20 %):   13,81 ft / 4,21 m
      - Mid (50 %):      13,81 ft / 4,21 m
      - Quarterdeck (15 %):   13,81 ft / 4,21 m
      - Stern:      13,81 ft / 4,21 m
      - Average freeboard:   14,15 ft / 4,31 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 107,4 %
      - Above water (accommodation/working, high = better): 93,3 %
   Waterplane Area: 11.105 Square feet or 1.032 Square metres
   Displacement factor (Displacement / loading): 82 %
   Structure weight / hull surface area: 80 lbs/sq ft or 389 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,89
      - Longitudinal: 2,88
      - Overall: 1,00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is adequate

[Carthaginian]

A fairly scary little coastal BB, but I think it needs a bit more depth on the main belt. A nice little design for Persia.

[miketr]

Problem is its main weapons are in deck mounts... 460 lb shells that have to be loaded in the open...  her rate of fire is going to suck...

That said id does have some nice punch for its displacement.

Michael

[ledeper]

Main Belt raised 30 cm,and due to the age of Main guns, Deck mounts seems to be the only solution,since displacement is to be kept at max 4500 tns.
Cyrus the Great II, Persia CDBB laid down 1913 (Engine 1906)

Displacement:
   4.420 t light; 4.734 t standard; 5.298 t normal; 5.749 t full load

Dimensions: Length overall / water x beam x draught
   291,90 ft / 288,71 ft x 49,21 ft x 19,69 ft (normal load)
   88,97 m / 88,00 m x 15,00 m  x 6,00 m

Armament:
      4 - 10,00" / 254 mm guns (2x2 guns), 462,50lbs / 209,79kg shells, 1885 Model
     Breech loading guns in deck mounts
     on centreline ends, evenly spread
      10 - 6,00" / 152 mm guns in single mounts, 108,00lbs / 48,99kg shells, 1913 Model
     Breech loading guns in deck mounts
     on side, all amidships
      2 - 1,57" / 40,0 mm guns in single mounts, 1,95lbs / 0,88kg shells, 1913 Model
     Breech loading guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 2.934 lbs / 1.331 kg
   Shells per gun, main battery: 120

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   9,84" / 250 mm   204,07 ft / 62,20 m   7,78 ft / 2,37 m
   Ends:   1,97" / 50 mm   101,02 ft / 30,79 m   8,43 ft / 2,57 m
   Upper:   3,94" / 100 mm   187,66 ft / 57,20 m   8,01 ft / 2,44 m
     Main Belt covers 109 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   9,84" / 250 mm   5,91" / 150 mm            -

   - Armour deck: 1,97" / 50 mm, Conning tower: 7,87" / 200 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 3 shafts, 13.166 shp / 9.822 Kw = 19,95 kts
   Range 5.000nm at 12,00 kts
   Bunker at max displacement = 1.015 tons

Complement:
   309 - 403

Cost:
   £0,635 million / $2,542 million

Distribution of weights at normal displacement:
   Armament: 367 tons, 6,9 %
   Armour: 1.682 tons, 31,7 %
      - Belts: 1.004 tons, 19,0 %
      - Torpedo bulkhead: 0 tons, 0,0 %
      - Armament: 225 tons, 4,2 %
      - Armour Deck: 401 tons, 7,6 %
      - Conning Tower: 52 tons, 1,0 %
   Machinery: 855 tons, 16,1 %
   Hull, fittings & equipment: 1.367 tons, 25,8 %
   Fuel, ammunition & stores: 878 tons, 16,6 %
   Miscellaneous weights: 150 tons, 2,8 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     4.739 lbs / 2.150 Kg = 9,5 x 10,0 " / 254 mm shells or 1,0 torpedoes
   Stability (Unstable if below 1.00): 1,31
   Metacentric height 2,8 ft / 0,9 m
   Roll period: 12,4 seconds
   Steadiness   - As gun platform (Average = 50 %): 53 %
         - Recoil effect (Restricted arc if above 1.00): 0,48
   Seaboat quality  (Average = 1.00): 1,05

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,663
   Length to Beam Ratio: 5,87 : 1
   'Natural speed' for length: 16,99 kts
   Power going to wave formation at top speed: 62 %
   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:      18,04 ft / 5,50 m
      - Forecastle (20 %):   13,81 ft / 4,21 m
      - Mid (50 %):      13,81 ft / 4,21 m
      - Quarterdeck (15 %):   13,81 ft / 4,21 m
      - Stern:      13,81 ft / 4,21 m
      - Average freeboard:   14,15 ft / 4,31 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 107,9 %
      - Above water (accommodation/working, high = better): 93,8 %
   Waterplane Area: 11.015 Square feet or 1.023 Square metres
   Displacement factor (Displacement / loading): 82 %
   Structure weight / hull surface area: 80 lbs/sq ft or 391 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,89
      - Longitudinal: 2,91
      - Overall: 1,00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is adequate

[The Bushranger]

At a glance...

-Armour belts are longer than the ship is
-Should have hoists (= powered mounts)
-Secondaries...casemates?
-Probably just cosmetic, but the turbines should be a round power level (say, 4300hp each instead of the 4388 and change they are now)
-I'd aim for a slightly larger ship to fit the hoists, try ~5000t light?
-Needs more cowbell

[maddox]

The twin 10" should be mount and hoist, otherwise these guns will train very slow, and not to take in account the reload times. 
And the exposed muntion and powderbags on deck.

But she can be build.

[P3D]

Twin 10" does not seem to  be suitable for twin deck mounts, with hoists or not.
Engine 1905.

Your ROF would be abysmal unless in a new barbette+turret mount.
Or just buy modern guns from a friendly power.