GFD-1921 Fleet Destroyer

[snip]

Ten Ships, names Soon(tm)

GFD-1921, Imperial Roman Republic Destroyer laid down 1921

Displacement:
   1,280 t light; 1,324 t standard; 1,542 t normal; 1,717 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (334.64 ft / 328.08 ft) x 29.53 ft x (10.66 / 11.59 ft)
   (102.00 m / 100.00 m) x 9.00 m  x (3.25 / 3.53 m)

Armament:
      4 - 3.94" / 100 mm 45.0 cal guns - 30.86lbs / 14.00kg shells, 175 per gun
     Breech loading guns in deck mounts, 1909 Model
     2 x Twin mounts on centreline ends, evenly spread
      4 - 0.26" / 6.5 mm 110.0 cal guns - 0.01lbs / 0.00kg shells, 10,000 per gun
     Breech loading guns in deck mounts, 1911 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 123 lbs / 56 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.39" / 10 mm   0.20" / 5 mm            -
   2nd:   0.20" / 5 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 28,000 shp / 20,888 Kw = 30.37 kts
   Range 5,500nm at 14.00 kts
   Bunker at max displacement = 393 tons

Complement:
   122 - 159

Cost:
   £0.407 million / $1.629 million

Distribution of weights at normal displacement:
   Armament: 17 tons, 1.1 %
      - Guns: 17 tons, 1.1 %
   Armour: 11 tons, 0.7 %
      - Armament: 11 tons, 0.7 %
   Machinery: 780 tons, 50.6 %
   Hull, fittings & equipment: 374 tons, 24.2 %
   Fuel, ammunition & stores: 262 tons, 17.0 %
   Miscellaneous weights: 100 tons, 6.5 %
      - Hull below water: 25 tons
      - On freeboard deck: 75 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     470 lbs / 213 Kg = 15.4 x 3.9 " / 100 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.27
   Metacentric height 1.2 ft / 0.4 m
   Roll period: 11.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.19
   Seaboat quality  (Average = 1.00): 1.15

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.522 / 0.535
   Length to Beam Ratio: 11.11 : 1
   'Natural speed' for length: 18.11 kts
   Power going to wave formation at top speed: 67 %
   Trim (Max stability = 0, Max steadiness = 100): 61
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 0.89 ft / 0.27 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  15.58 ft / 4.75 m,  13.94 ft / 4.25 m
      - Forward deck:   30.00 %,  13.94 ft / 4.25 m,  13.94 ft / 4.25 m
      - Aft deck:   35.00 %,  13.94 ft / 4.25 m,  13.94 ft / 4.25 m
      - Quarter deck:   15.00 %,  13.94 ft / 4.25 m,  13.94 ft / 4.25 m
      - Average freeboard:      14.07 ft / 4.29 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 169.2 %
      - Above water (accommodation/working, high = better): 143.5 %
   Waterplane Area: 6,589 Square feet or 612 Square metres
   Displacement factor (Displacement / loading): 74 %
   Structure weight / hull surface area: 28 lbs/sq ft or 136 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.85
      - Overall: 0.57
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

Misc Weight
--24t 6x530mm (1913) Torpedo Tubes (2x3 mounts centerline)
--2t 1912 FC
--25t LR Wireless
--3t Night Fighting Equipment
--10t Construction Reserve
--15t 1915 Hydrophone
--16t Depth Charges
--4t DC Throwers
--1t ASW Paravane