Ambrogino Masin Class Fleet Destroyers

[snip]

Ten Ships

Ambrogino Masin, Imperial Roman Destroyer laid down 1919

Displacement:
   1,500 t light; 1,561 t standard; 1,777 t normal; 1,950 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (347.76 ft / 344.49 ft) x 32.81 ft x (11.48 / 12.30 ft)
   (106.00 m / 105.00 m) x 10.00 m  x (3.50 / 3.75 m)

Armament:
      4 - 5.51" / 140 mm 40.0 cal guns - 85.98lbs / 39.00kg shells, 130 per gun
     Quick firing guns in deck mounts, 1917 Model
     4 x Single mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
      4 - 0.26" / 6.5 mm 110.0 cal guns - 0.01lbs / 0.00kg shells, 10,000 per gun
     Machine guns in deck mounts, 1911 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 344 lbs / 156 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, 32,000 shp / 23,872 Kw = 30.99 kts
   Range 4,780nm at 14.00 kts
   Bunker at max displacement = 389 tons

Complement:
   136 - 177

Cost:
   £0.422 million / $1.690 million

Distribution of weights at normal displacement:
   Armament: 49 tons, 2.8 %
      - Guns: 49 tons, 2.8 %
   Armour: 9 tons, 0.5 %
      - Armament: 9 tons, 0.5 %
   Machinery: 910 tons, 51.2 %
   Hull, fittings & equipment: 437 tons, 24.6 %
   Fuel, ammunition & stores: 277 tons, 15.6 %
   Miscellaneous weights: 95 tons, 5.3 %
      - Hull below water: 20 tons
      - On freeboard deck: 75 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     512 lbs / 232 Kg = 6.1 x 5.5 " / 140 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.26
   Metacentric height 1.4 ft / 0.4 m
   Roll period: 11.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 73 %
         - Recoil effect (Restricted arc if above 1.00): 0.44
   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): 0.479 / 0.491
   Length to Beam Ratio: 10.50 : 1
   'Natural speed' for length: 18.56 kts
   Power going to wave formation at top speed: 66 %
   Trim (Max stability = 0, Max steadiness = 100): 63
   Bow angle (Positive = bow angles forward): 12.50 degrees
   Stern overhang: -4.92 ft / -1.50 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  14.76 ft / 4.50 m,  14.76 ft / 4.50 m
      - Forward deck:   30.00 %,  14.76 ft / 4.50 m,  14.76 ft / 4.50 m
      - Aft deck:   35.00 %,  14.76 ft / 4.50 m,  14.76 ft / 4.50 m
      - Quarter deck:   15.00 %,  14.76 ft / 4.50 m,  14.76 ft / 4.50 m
      - Average freeboard:      14.76 ft / 4.50 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 174.5 %
      - Above water (accommodation/working, high = better): 152.8 %
   Waterplane Area: 7,391 Square feet or 687 Square metres
   Displacement factor (Displacement / loading): 71 %
   Structure weight / hull surface area: 32 lbs/sq ft or 154 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.84
      - Overall: 0.57
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

Misc Wieght
--24t 6x530mm (1913) Torpedo Tubes (2x3 mounts centerline)
--8t 1912 FC
--25t LR Wireless
--3t Night Fighting Equipment
--5t Construction Reserve
--15t 1915 Hydrophone
--12t Depth Charges
--3t DC Throwers

[snip]

By the end of 1923H1, all ships had been updated to 1918 Fire Control.