Design Request

[miketr]

YES that is the problem.

Michael

[miketr]

BB-1917, United States Battleship laid down 1920

Displacement:
   43,699 t light; 47,000 t standard; 48,716 t normal; 50,089 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (714.61 ft / 710.00 ft) x 108.00 ft x (34.00 / 34.81 ft)
   (217.81 m / 216.41 m) x 32.92 m  x (10.36 / 10.61 m)

Armament:
      12 - 16.00" / 406 mm 50.0 cal guns - 2,168.09lbs / 983.43kg shells, 150 per gun
     Breech loading guns in turret on barbette mounts, 1920 Model
     2 x Triple mounts on centreline, forward deck forward
      1 raised mount - superfiring
     2 x Triple mounts on centreline, aft deck aft
      1 raised mount aft - superfiring
      16 - 6.00" / 152 mm 53.0 cal guns - 115.76lbs / 52.51kg shells, 150 per gun
     Breech loading guns in casemate mounts, 1920 Model
     16 x Single mounts on sides, evenly spread
      4 - 3.00" / 76.2 mm 50.0 cal guns - 14.29lbs / 6.48kg shells, 150 per gun
     Breech loading guns in deck and hoist mounts, 1920 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 27,927 lbs / 12,667 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13.5" / 343 mm   455.00 ft / 138.68 m   12.47 ft / 3.80 m
   Ends:   Unarmoured
     Main Belt covers 99 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.00" / 25 mm   455.00 ft / 138.68 m   31.24 ft / 9.52 m
   Beam between torpedo bulkheads 100.00 ft / 30.48 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   18.0" / 457 mm   10.0" / 254 mm      13.5" / 343 mm

   - Armoured deck - multiple decks:
   For and Aft decks: 6.00" / 152 mm
   Forecastle: 4.00" / 102 mm  Quarter deck: 4.00" / 102 mm

   - Conning towers: Forward 16.00" / 406 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 102,753 shp / 76,654 Kw = 26.00 kts
   Range 10,275nm at 10.00 kts
   Bunker at max displacement = 3,089 tons

Complement:
   1,639 - 2,131

Cost:
   £11.431 million / $45.724 million

Distribution of weights at normal displacement:
   Armament: 5,031 tons, 10.3 %
      - Guns: 5,031 tons, 10.3 %
   Armour: 15,994 tons, 32.8 %
      - Belts: 3,365 tons, 6.9 %
      - Torpedo bulkhead: 526 tons, 1.1 %
      - Armament: 5,459 tons, 11.2 %
      - Armour Deck: 6,184 tons, 12.7 %
      - Conning Tower: 460 tons, 0.9 %
   Machinery: 3,593 tons, 7.4 %
   Hull, fittings & equipment: 19,080 tons, 39.2 %
   Fuel, ammunition & stores: 5,017 tons, 10.3 %
   Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     65,700 lbs / 29,801 Kg = 32.1 x 16.0 " / 406 mm shells or 7.9 torpedoes
   Stability (Unstable if below 1.00): 1.01
   Metacentric height 5.7 ft / 1.7 m
   Roll period: 19.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 80 %
         - Recoil effect (Restricted arc if above 1.00): 1.68
   Seaboat quality  (Average = 1.00): 1.60

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.654 / 0.657
   Length to Beam Ratio: 6.57 : 1
   'Natural speed' for length: 26.65 kts
   Power going to wave formation at top speed: 51 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 7.50 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  35.00 ft / 10.67 m,  35.00 ft / 10.67 m
      - Forward deck:   40.00 %,  35.00 ft / 10.67 m,  35.00 ft / 10.67 m
      - Aft deck:   25.00 %,  25.00 ft / 7.62 m,  25.00 ft / 7.62 m
      - Quarter deck:   15.00 %,  25.00 ft / 7.62 m,  25.00 ft / 7.62 m
      - Average freeboard:      31.00 ft / 9.45 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 83.6 %
      - Above water (accommodation/working, high = better): 213.5 %
   Waterplane Area: 58,957 Square feet or 5,477 Square metres
   Displacement factor (Displacement / loading): 98 %
   Structure weight / hull surface area: 240 lbs/sq ft or 1,170 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.91
      - Longitudinal: 2.38
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Let me see if I can get a drawing doing now.

[TacCovert4]

For a 1917 design, especially one that's so cutting edge everywhere else, I find the slow cruising speed to be anachronistic.  You'd think she'd have a 14kt cruise at least.

[miketr]

For a 1917 design, especially one that's so cutting edge everywhere else, I find the slow cruising speed to be anachronistic.  You'd think she'd have a 14kt cruise at least.

The cruising speed is sloth I will admit.  I want something close enough for my story and leave it at that.

[miketr]

More bits thanks to http://www.shipbucket.com/

[TacCovert4]

Definitely a monster.  Though thinking about US BB aesthetic a bit and looking at the picture, I'd probably do the secondary as 6 casemates on the main deck and 4 single mounts above the casemates....rather than stacking two sets of casemates.

[Kaiser Kirk]

<looks at all his ships with double casements>

But double casements are lovely !!!

[Jefgte]

With superimposed casemates, hoists are double.
They will be easier to fit T2x127 during a subsequent overhaul.

[miketr]

USN BC

BC-1917, USA Battle Cruiser laid down 1920

Displacement:
   44,119 t light; 46,613 t standard; 48,354 t normal; 49,747 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (850.00 ft / 850.00 ft) x 102.00 ft x (32.00 / 32.76 ft)
   (259.08 m / 259.08 m) x 31.09 m  x (9.75 / 9.99 m)

Armament:
      8 - 16.00" / 406 mm 50.0 cal guns - 2,168.09lbs / 983.43kg shells, 150 per gun
     Breech loading guns in turret on barbette mounts, 1920 Model
     2 x Twin mounts on centreline, forward evenly spread
      1 raised mount
     2 x Twin mounts on centreline, aft evenly spread
      1 raised mount aft
      8 - 6.00" / 152 mm 53.0 cal guns - 115.77lbs / 52.51kg shells, 150 per gun
     Breech loading guns in casemate mounts, 1920 Model
     8 x Single mounts on sides, evenly spread
      4 - 3.00" / 76.2 mm 50.0 cal guns - 14.29lbs / 6.48kg shells, 150 per gun
     Breech loading guns in deck mounts, 1920 Model
     4 x Single mounts on sides, evenly spread
      Weight of broadside 18,328 lbs / 8,313 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12.0" / 305 mm   552.50 ft / 168.40 m   12.12 ft / 3.69 m
   Ends:   Unarmoured
     Main Belt covers 100 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   18.0" / 457 mm   10.0" / 254 mm      13.5" / 343 mm
   2nd:         -            -         6.00" / 152 mm

   - Armoured deck - multiple decks:
   For and Aft decks: 5.00" / 127 mm
   Forecastle: 4.00" / 102 mm  Quarter deck: 4.00" / 102 mm

   - Conning towers: Forward 12.00" / 305 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 235,595 shp / 175,754 Kw = 33.00 kts
   Range 9,996nm at 10.00 kts
   Bunker at max displacement = 3,134 tons

Complement:
   1,629 - 2,119

Cost:
   £10.751 million / $43.003 million

Distribution of weights at normal displacement:
   Armament: 3,298 tons, 6.8 %
      - Guns: 3,298 tons, 6.8 %
   Armour: 13,851 tons, 28.6 %
      - Belts: 3,390 tons, 7.0 %
      - Armament: 4,372 tons, 9.0 %
      - Armour Deck: 5,746 tons, 11.9 %
      - Conning Tower: 343 tons, 0.7 %
   Machinery: 8,238 tons, 17.0 %
   Hull, fittings & equipment: 18,732 tons, 38.7 %
   Fuel, ammunition & stores: 4,235 tons, 8.8 %
   Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     55,583 lbs / 25,212 Kg = 27.1 x 16.0 " / 406 mm shells or 3.5 torpedoes
   Stability (Unstable if below 1.00): 1.00
   Metacentric height 5.1 ft / 1.6 m
   Roll period: 19.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 67 %
         - Recoil effect (Restricted arc if above 1.00): 1.16
   Seaboat quality  (Average = 1.00): 1.22

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.610 / 0.613
   Length to Beam Ratio: 8.33 : 1
   'Natural speed' for length: 29.15 kts
   Power going to wave formation at top speed: 55 %
   Trim (Max stability = 0, Max steadiness = 100): 55
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  35.00 ft / 10.67 m,  30.00 ft / 9.14 m
      - Forward deck:   30.00 %,  30.00 ft / 9.14 m,  30.00 ft / 9.14 m
      - Aft deck:   35.00 %,  30.00 ft / 9.14 m,  30.00 ft / 9.14 m
      - Quarter deck:   15.00 %,  30.00 ft / 9.14 m,  30.00 ft / 9.14 m
      - Average freeboard:      30.40 ft / 9.27 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 90.9 %
      - Above water (accommodation/working, high = better): 224.5 %
   Waterplane Area: 64,005 Square feet or 5,946 Square metres
   Displacement factor (Displacement / loading): 101 %
   Structure weight / hull surface area: 207 lbs/sq ft or 1,009 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.53
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Good seaboat, rides out heavy weather easily