Preussen class refubishment 1920

[ledeper]

Since all ships is due for their 10 refit,it is decided to refurbish all four during 1920.

Preussen original, Enter country Enter ship type laid down 1908

Displacement:
   24.057 t light; 25.458 t standard; 28.935 t normal; 31.716 t full load

Dimensions: Length overall / water x beam x draught
   552,82 ft / 552,82 ft x 100,07 ft x 29,53 ft (normal load)
   168,50 m / 168,50 m x 30,50 m  x 9,00 m

Armament:
      8 - 14,00" / 356 mm guns (4x2 guns), 1.372,00lbs / 622,33kg shells, 1908 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      8 - 5,91" / 150 mm guns in single mounts, 102,98lbs / 46,71kg shells, 1908 Model
     Breech loading guns in casemate mounts
     on side, all amidships
      10 - 3,94" / 100 mm guns in single mounts, 30,51lbs / 13,84kg shells, 1908 Model
     Quick firing guns in deck mounts
     on side, evenly spread
      4 - 1,57" / 40,0 mm guns in single mounts, 1,95lbs / 0,88kg shells, 1916 Model
     Anti-aircraft guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 12.113 lbs / 5.494 kg
   Shells per gun, main battery: 120

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   14,0" / 356 mm   359,33 ft / 109,52 m   12,00 ft / 3,66 m
   Ends:   2,00" / 51 mm   193,47 ft / 58,97 m   12,00 ft / 3,66 m
   Upper:   6,00" / 152 mm   359,33 ft / 109,52 m   8,00 ft / 2,44 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead:
      2,00" / 51 mm   359,33 ft / 109,52 m   27,10 ft / 8,26 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   14,0" / 356 mm   10,0" / 254 mm      10,0" / 254 mm
   2nd:   6,00" / 152 mm   4,00" / 102 mm            -
   3rd:   2,00" / 51 mm         -               -

   - Armour deck: 4,00" / 102 mm, Conning tower: 14,00" / 356 mm

Machinery:
   Coal fired boilers, steam turbines,
   Direct drive, 4 shafts, 46.571 shp / 34.742 Kw = 22,50 kts
   Range 6.500nm at 14,00 kts
   Bunker at max displacement = 6.258 tons (100% coal)

Complement:
   1.109 - 1.442

Cost:
   £2,476 million / $9,904 million

Distribution of weights at normal displacement:
   Armament: 1.514 tons, 5,2 %
   Armour: 10.082 tons, 34,8 %
      - Belts: 3.632 tons, 12,6 %
      - Torpedo bulkhead: 721 tons, 2,5 %
      - Armament: 2.394 tons, 8,3 %
      - Armour Deck: 3.050 tons, 10,5 %
      - Conning Tower: 284 tons, 1,0 %
   Machinery: 2.587 tons, 8,9 %
   Hull, fittings & equipment: 9.574 tons, 33,1 %
   Fuel, ammunition & stores: 4.878 tons, 16,9 %
   Miscellaneous weights: 300 tons, 1,0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     36.905 lbs / 16.740 Kg = 26,9 x 14,0 " / 356 mm shells or 6,5 torpedoes
   Stability (Unstable if below 1.00): 1,16
   Metacentric height 6,6 ft / 2,0 m
   Roll period: 16,4 seconds
   Steadiness   - As gun platform (Average = 50 %): 56 %
         - Recoil effect (Restricted arc if above 1.00): 0,40
   Seaboat quality  (Average = 1.00): 1,13

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,620
   Length to Beam Ratio: 5,52 : 1
   'Natural speed' for length: 23,51 kts
   Power going to wave formation at top speed: 51 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   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:      25,85 ft / 7,88 m
      - Forecastle (20 %):   16,47 ft / 5,02 m
      - Mid (50 %):      16,47 ft / 5,02 m
      - Quarterdeck (15 %):   16,47 ft / 5,02 m
      - Stern:      16,47 ft / 5,02 m
      - Average freeboard:   17,22 ft / 5,25 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 88,0 %
      - Above water (accommodation/working, high = better): 116,6 %
   Waterplane Area: 41.220 Square feet or 3.829 Square metres
   Displacement factor (Displacement / loading): 105 %
   Structure weight / hull surface area: 175 lbs/sq ft or 856 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,95
      - Longitudinal: 1,55
      - Overall: 1,00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is adequate

Preussen Rebuild, Enter country Enter ship type laid down 1908 (Engine 1920)

Displacement:
   22.820 t light; 24.178 t standard; 26.041 t normal; 27.532 t full load

Dimensions: Length overall / water x beam x draught
   556,58 ft / 552,82 ft x 100,07 ft x 29,53 ft (normal load)
   169,65 m / 168,50 m x 30,50 m  x 9,00 m

Armament:
      8 - 14,00" / 356 mm guns (4x2 guns), 1.372,00lbs / 622,33kg shells, 1908 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      8 - 5,91" / 150 mm guns in single mounts, 102,98lbs / 46,71kg shells, 1920 Model
     Quick firing guns in casemate mounts
     on side, all amidships
      16 - 3,94" / 100 mm guns (10 mounts), 30,51lbs / 13,84kg shells, 1920 Model
     Quick firing guns in deck mounts
     on side, evenly spread
      4 - 1,57" / 40,0 mm guns in single mounts, 1,95lbs / 0,88kg shells, 1916 Model
     Anti-aircraft guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 12.296 lbs / 5.577 kg
   Shells per gun, main battery: 120

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   14,0" / 356 mm   359,33 ft / 109,52 m   12,00 ft / 3,66 m
   Ends:   Unarmoured
   Upper:   6,00" / 152 mm   359,33 ft / 109,52 m   8,00 ft / 2,44 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead:
      2,00" / 51 mm   359,33 ft / 109,52 m   27,10 ft / 8,26 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   14,0" / 356 mm   10,0" / 254 mm      10,0" / 254 mm
   2nd:   6,00" / 152 mm   4,00" / 102 mm            -
   3rd:   2,00" / 51 mm         -               -

   - Armour deck: 4,00" / 102 mm, Conning tower: 14,00" / 356 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric cruising motors plus geared drives, 4 shafts, 46.381 shp / 34.600 Kw = 23,00 kts
   Range 8.500nm at 14,00 kts
   Bunker at max displacement = 3.354 tons

Complement:
   1.024 - 1.332

Cost:
   £2,317 million / $9,267 million

Distribution of weights at normal displacement:
   Armament: 1.537 tons, 5,9 %
   Armour: 9.724 tons, 37,3 %
      - Belts: 3.441 tons, 13,2 %
      - Torpedo bulkhead: 721 tons, 2,8 %
      - Armament: 2.420 tons, 9,3 %
      - Armour Deck: 2.878 tons, 11,1 %
      - Conning Tower: 265 tons, 1,0 %
   Machinery: 1.622 tons, 6,2 %
   Hull, fittings & equipment: 9.436 tons, 36,2 %
   Fuel, ammunition & stores: 3.222 tons, 12,4 %
   Miscellaneous weights: 500 tons, 1,9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     34.367 lbs / 15.589 Kg = 25,0 x 14,0 " / 356 mm shells or 6,5 torpedoes
   Stability (Unstable if below 1.00): 1,10
   Metacentric height 6,0 ft / 1,8 m
   Roll period: 17,2 seconds
   Steadiness   - As gun platform (Average = 50 %): 56 %
         - Recoil effect (Restricted arc if above 1.00): 0,44
   Seaboat quality  (Average = 1.00): 1,12

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,558
   Length to Beam Ratio: 5,52 : 1
   'Natural speed' for length: 23,51 kts
   Power going to wave formation at top speed: 51 %
   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:      21,33 ft / 6,50 m
      - Forecastle (20 %):   16,47 ft / 5,02 m
      - Mid (50 %):      16,47 ft / 5,02 m
      - Quarterdeck (15 %):   16,47 ft / 5,02 m
      - Stern:      16,47 ft / 5,02 m
      - Average freeboard:   16,86 ft / 5,14 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 84,6 %
      - Above water (accommodation/working, high = better): 119,2 %
   Waterplane Area: 38.897 Square feet or 3.614 Square metres
   Displacement factor (Displacement / loading): 101 %
   Structure weight / hull surface area: 182 lbs/sq ft or 889 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,95
      - Longitudinal: 1,67
      - Overall: 1,00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is adequate

Boiler change from Coal to Oil
New Machines and Boilers
"Atlantic Bow"
1908 sec and tert guns changed to 1920 model
increase of Misc weight to 500 t
New FC
increase speed 1/2 knts
Range increase 2000 Nm

Price $4,5 +2 Bp each

Recycling:
Machinery: 2.587 tons,x 4=10348 tons=1,7 Bp

[Sachmle]

Why not rip out the casemated 15cm guns and install some nice deck mounted 127mm guns instead. Probably could have actually cut some of the 100mm guns instead of adding 6 more (w/o changing the mount total btw).