Battleships of MesoAmerica

[Sachmle]

Miguel Hidalgo Class, Democratic Republic of MesoAmerica Battleship laid down 1911 (Engine 1909)


Displacement:
   13,000 t light; 13,701 t standard; 14,392 t normal; 14,945 t full load

Dimensions: Length overall / water x beam x draught
   475.00 ft / 475.00 ft x 85.00 ft x 24.00 ft (normal load)
   144.78 m / 144.78 m x 25.91 m  x 7.32 m

Armament:
      8 - 12.00" / 305 mm guns (4x2 guns), 800.00lbs / 362.87kg shells, 1909 Model
     Breech loading guns in turrets (on barbettes)
     on centreline, evenly spread, 1 raised mount
     Aft Main mounts separated by engine room
      10 - 5.50" / 140 mm guns in single mounts, 75.00lbs / 34.02kg shells, 1909 Model
     Breech loading guns in casemate mounts
     on side, all amidships
     10 guns in hull casemates - Limited use in heavy seas
      12 - 2.25" / 57.2 mm guns in single mounts, 5.00lbs / 2.27kg shells, 1909 Model
     Quick firing guns in casemate mounts
     on side, evenly spread
     12 guns in hull casemates - Limited use in heavy seas
      10 - 2.25" / 57.2 mm guns in single mounts, 5.00lbs / 2.27kg shells, 1909 Model
     Quick firing guns in deck mounts
     on side, evenly spread, 6 raised mounts
   Weight of broadside 7,260 lbs / 3,293 kg
   Shells per gun, main battery: 100

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   8.00" / 203 mm   336.00 ft / 102.41 m   16.00 ft / 4.88 m
   Ends:   3.00" / 76 mm   139.00 ft / 42.37 m   12.00 ft / 3.66 m
   Upper:   8.00" / 203 mm   200.00 ft / 60.96 m   8.00 ft / 2.44 m
     Main Belt covers 109 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   10.0" / 254 mm   4.00" / 102 mm      8.00" / 203 mm
   2nd:   4.00" / 102 mm   4.00" / 102 mm      4.00" / 102 mm
   3rd:   1.00" / 25 mm         -               -
   4th:   1.00" / 25 mm         -               -

   - Armour deck: 1.50" / 38 mm, Conning tower: 8.00" / 203 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 4 shafts, 20,000 ihp / 14,920 Kw = 20.16 kts
   Range 4,000nm at 10.41 kts
   Bunker at max displacement = 1,243 tons (100% coal)

Complement:
   656 - 854

Cost:
   £1.497 million / $5.987 million

Distribution of weights at normal displacement:
   Armament: 984 tons, 6.8 %
   Armour: 4,834 tons, 33.6 %
      - Belts: 2,681 tons, 18.6 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 1,291 tons, 9.0 %
      - Armour Deck: 760 tons, 5.3 %
      - Conning Tower: 102 tons, 0.7 %
   Machinery: 1,538 tons, 10.7 %
   Hull, fittings & equipment: 5,619 tons, 39.0 %
   Fuel, ammunition & stores: 1,392 tons, 9.7 %
   Miscellaneous weights: 25 tons, 0.2 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     16,791 lbs / 7,616 Kg = 19.4 x 12.0 " / 305 mm shells or 2.4 torpedoes
   Stability (Unstable if below 1.00): 1.16
   Metacentric height 5.2 ft / 1.6 m
   Roll period: 15.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.48
   Seaboat quality  (Average = 1.00): 1.44

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.520
   Length to Beam Ratio: 5.59 : 1
   'Natural speed' for length: 21.79 kts
   Power going to wave formation at top speed: 46 %
   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:      24.00 ft / 7.32 m
      - Forecastle (15 %):   20.00 ft / 6.10 m
      - Mid (50 %):      20.00 ft / 6.10 m (12.00 ft / 3.66 m aft of break)
      - Quarterdeck (15 %):   12.00 ft / 3.66 m
      - Stern:      12.00 ft / 3.66 m
      - Average freeboard:   16.24 ft / 4.95 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 86.0 %
      - Above water (accommodation/working, high = better): 127.3 %
   Waterplane Area: 27,396 Square feet or 2,545 Square metres
   Displacement factor (Displacement / loading): 91 %
   Structure weight / hull surface area: 151 lbs/sq ft or 739 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.93
      - Longitudinal: 1.82
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

Miguel Hidalgo
Mariano Matamoros