Ottoman BB 'Osmanieh'

[Alikchi]

The last Ottoman battleship was laid down in 1894 - it's time to build another pair.

Osmanieh and Mahmudieh. Drawing pending.

Osmanieh, Ottoman battleship laid down 1906 (Engine 1905)

Displacement:
   16,626 t light; 18,029 t standard; 19,949 t normal; 21,485 t full load

Dimensions: Length overall / water x beam x draught
   520.01 ft / 520.01 ft x 82.68 ft x 27.07 ft (normal load)
   158.50 m / 158.50 m x 25.20 m  x 8.25 m

Armament:
      4 - 11.02" / 280 mm guns (2x2 guns), 661.39lbs / 300.00kg shells, 1906 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread
      8 - 11.02" / 280 mm guns (4x2 guns), 661.39lbs / 300.00kg shells, 1906 Model
     Breech loading guns in turrets (on barbettes)
     on side, all amidships
      8 - 4.13" / 105 mm guns in single mounts, 35.27lbs / 16.00kg shells, 1906 Model
     Quick firing guns in casemate mounts
     on side, all forward
      6 - 4.13" / 105 mm guns in single mounts, 35.27lbs / 16.00kg shells, 1906 Model
     Breech loading guns in deck mounts
     on side, evenly spread, all raised mounts
      15 - 0.59" / 15.0 mm guns in single mounts, 0.10lbs / 0.05kg shells, 1906 Model
     Machine guns in deck mounts
     on side, evenly spread, 5 raised mounts
   Weight of broadside 8,432 lbs / 3,825 kg
   Shells per gun, main battery: 200
   4 - 15.7" / 400 mm submerged torpedo tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   11.8" / 300 mm   393.70 ft / 120.00 m   10.93 ft / 3.33 m
   Ends:   1.97" / 50 mm     98.43 ft / 30.00 m   10.93 ft / 3.33 m
     27.89 ft / 8.50 m Unarmoured ends
     Main Belt covers 116 % of normal length

   - Torpedo Bulkhead:
      1.97" / 50 mm   328.08 ft / 100.00 m   24.28 ft / 7.40 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   11.0" / 280 mm   5.51" / 140 mm      11.0" / 280 mm
   2nd:   11.0" / 280 mm   5.51" / 140 mm      11.0" / 280 mm
   3rd:   0.59" / 15 mm         -               -
   4th:   0.59" / 15 mm         -               -
   5th:   0.20" / 5 mm         -               -

   - Armour deck: 1.97" / 50 mm, Conning tower: 11.81" / 300 mm

Machinery:
   Coal fired boilers, steam turbines,
   Direct drive, 4 shafts, 30,000 shp / 22,380 Kw = 21.35 kts
   Range 8,000nm at 10.00 kts
   Bunker at max displacement = 3,456 tons (100% coal)

Complement:
   839 - 1,091

Cost:
   £1.828 million / $7.312 million

Distribution of weights at normal displacement:
   Armament: 1,067 tons, 5.3 %
   Armour: 6,114 tons, 30.6 %
      - Belts: 2,229 tons, 11.2 %
      - Torpedo bulkhead: 580 tons, 2.9 %
      - Armament: 1,972 tons, 9.9 %
      - Armour Deck: 1,145 tons, 5.7 %
      - Conning Tower: 187 tons, 0.9 %
   Machinery: 2,500 tons, 12.5 %
   Hull, fittings & equipment: 6,796 tons, 34.1 %
   Fuel, ammunition & stores: 3,323 tons, 16.7 %
   Miscellaneous weights: 150 tons, 0.8 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     20,908 lbs / 9,484 Kg = 31.2 x 11.0 " / 280 mm shells or 3.4 torpedoes
   Stability (Unstable if below 1.00): 1.12
   Metacentric height 4.7 ft / 1.4 m
   Roll period: 16.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.57
   Seaboat quality  (Average = 1.00): 1.30

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.600
   Length to Beam Ratio: 6.29 : 1
   'Natural speed' for length: 22.80 kts
   Power going to wave formation at top speed: 48 %
   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:      24.61 ft / 7.50 m
      - Forecastle (20 %):   16.40 ft / 5.00 m
      - Mid (60 %):      16.40 ft / 5.00 m (15.75 ft / 4.80 m aft of break)
      - Quarterdeck (15 %):   15.75 ft / 4.80 m
      - Stern:      15.75 ft / 4.80 m
      - Average freeboard:   16.80 ft / 5.12 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 115.1 %
      - Above water (accommodation/working, high = better): 115.3 %
   Waterplane Area: 31,445 Square feet or 2,921 Square metres
   Displacement factor (Displacement / loading): 101 %
   Structure weight / hull surface area: 154 lbs/sq ft or 754 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.52
      - 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
   Good seaboat, rides out heavy weather easily

[Desertfox]

Too light secondaries, and I still dont like torpedo bulkheads on ships. Other than that looks good.

[Ithekro]

You could do as historical and have others build your battleships for you.

[Alikchi]

You could do as historical and have others build your battleships for you.

Yeah, but I already have the two Turgut Reis class built in Istanbul, rather than Germany. Might as well make use of my facilities.

[Alikchi]

Too light secondaries, and I still dont like torpedo bulkheads on ships. Other than that looks good.

Thanks. The Ottomans are making an evolution towards a) larger 150mm secondaries, and then b) twin deck mounts.

[P3D]

Your engine is limited to 20,000SHP for turbines.
Secondary armanent is inadequate.
You have neither upper belt nor casemate armor.
Decrease shells per gun from 200 to 100 or so.

[Alikchi]

Modified

Osmanieh, Ottoman battleship laid down 1906 (Engine 1905)

Displacement:
   16,819 t light; 17,822 t standard; 19,728 t normal; 21,253 t full load

Dimensions: Length overall / water x beam x draught
   518.37 ft / 518.37 ft x 82.02 ft x 27.07 ft (normal load)
   158.00 m / 158.00 m x 25.00 m  x 8.25 m

Armament:
      4 - 11.02" / 280 mm guns (2x2 guns), 661.39lbs / 300.00kg shells, 1906 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread
      8 - 11.02" / 280 mm guns (4x2 guns), 661.39lbs / 300.00kg shells, 1906 Model
     Breech loading guns in turrets (on barbettes)
     on side, all amidships
      10 - 4.13" / 105 mm guns in single mounts, 35.27lbs / 16.00kg shells, 1906 Model
     Quick firing guns in casemate mounts
     on side, all forward
      6 - 4.13" / 105 mm guns in single mounts, 35.27lbs / 16.00kg shells, 1906 Model
     Breech loading guns in deck mounts
     on side, evenly spread, all raised mounts
      15 - 0.59" / 15.0 mm guns in single mounts, 0.10lbs / 0.05kg shells, 1906 Model
     Machine guns in deck mounts
     on side, evenly spread, 5 raised mounts
   Weight of broadside 8,503 lbs / 3,857 kg
   Shells per gun, main battery: 120
   4 - 15.7" / 400 mm submerged torpedo tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   11.8" / 300 mm   393.70 ft / 120.00 m   10.93 ft / 3.33 m
   Ends:   1.97" / 50 mm     98.43 ft / 30.00 m   10.93 ft / 3.33 m
     26.25 ft / 8.00 m Unarmoured ends
   Upper:   7.87" / 200 mm   393.70 ft / 120.00 m   8.01 ft / 2.44 m
     Main Belt covers 117 % of normal length

   - Torpedo Bulkhead:
      1.97" / 50 mm   328.08 ft / 100.00 m   24.28 ft / 7.40 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   11.0" / 280 mm   5.51" / 140 mm      11.0" / 280 mm
   2nd:   11.0" / 280 mm   5.51" / 140 mm      11.0" / 280 mm
   3rd:   2.95" / 75 mm         -         1.97" / 50 mm
   4th:   0.59" / 15 mm         -               -
   5th:   0.20" / 5 mm         -               -

   - Armour deck: 1.97" / 50 mm, Conning tower: 11.81" / 300 mm

Machinery:
   Coal fired boilers, steam turbines,
   Direct drive, 4 shafts, 20,000 shp / 14,920 Kw = 19.22 kts
   Range 8,000nm at 10.00 kts
   Bunker at max displacement = 3,431 tons (100% coal)

Complement:
   832 - 1,082

Cost:
   £1.725 million / $6.902 million

Distribution of weights at normal displacement:
   Armament: 1,076 tons, 5.5 %
   Armour: 7,205 tons, 36.5 %
      - Belts: 3,277 tons, 16.6 %
      - Torpedo bulkhead: 580 tons, 2.9 %
      - Armament: 2,030 tons, 10.3 %
      - Armour Deck: 1,132 tons, 5.7 %
      - Conning Tower: 186 tons, 0.9 %
   Machinery: 1,667 tons, 8.4 %
   Hull, fittings & equipment: 6,722 tons, 34.1 %
   Fuel, ammunition & stores: 2,909 tons, 14.7 %
   Miscellaneous weights: 150 tons, 0.8 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     24,686 lbs / 11,197 Kg = 36.9 x 11.0 " / 280 mm shells or 4.3 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 4.5 ft / 1.4 m
   Roll period: 16.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 72 %
         - Recoil effect (Restricted arc if above 1.00): 0.60
   Seaboat quality  (Average = 1.00): 1.47

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.600
   Length to Beam Ratio: 6.32 : 1
   'Natural speed' for length: 22.77 kts
   Power going to wave formation at top speed: 42 %
   Trim (Max stability = 0, Max steadiness = 100): 49
   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:      24.61 ft / 7.50 m
      - Forecastle (20 %):   16.40 ft / 5.00 m
      - Mid (60 %):      16.40 ft / 5.00 m (15.75 ft / 4.80 m aft of break)
      - Quarterdeck (15 %):   15.75 ft / 4.80 m
      - Stern:      15.75 ft / 4.80 m
      - Average freeboard:   16.80 ft / 5.12 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 95.8 %
      - Above water (accommodation/working, high = better): 115.0 %
   Waterplane Area: 31,097 Square feet or 2,889 Square metres
   Displacement factor (Displacement / loading): 102 %
   Structure weight / hull surface area: 154 lbs/sq ft or 751 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.60
      - 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

[Borys]

Ahoj!
I am worried ....
Borys

[maddox]

Nassau class?

[Desertfox]

Ah! the Austrians are worried!

Might the Sultan like some more advanced engines for his new ships? ;)

[olekit]

Can you draw a scaled sketch of your BB? I'm worry you don't put there all of your armament and mashinery in that dimensions....

[P3D]

It's larger than the Nassau class with the same armament. I bet it could fit in a 10m longer hull.

[Borys]

Ahoj!
Looks plausible. The Nassau was two metres beamer, but it had VTE.

Borys

[Alikchi]

Ah! the Austrians are worried!

Might the Sultan like some more advanced engines for his new ships? ;)

I'm tempted, I'm tempted.. do tell me more.  8)

Can you draw a scaled sketch of your BB? I'm worry you don't put there all of your armament and mashinery in that dimensions....

I'll put out a drawing as soon as it's done.. it -should- fit, even if it's a little tight.

[Alikchi]

Drawing done



It really turned out a lot like Nassau. I haven't figured out an Ottoman superstructure style yet so it just looks a bit Germanic at the moment.

Like Rocky - 1pixel=1foot.