B-Class Destroyer

[snip]

With the advent of VTE engines, the A-Class design is updated. The B-Class is much faster and mounts more 45mm weapons.

Ten Ships:
--Pennant Number 11 to Number 20

B-Class, Imperial Roman Republic Destroyer laid down 1897

Displacement:
   500 t light; 514 t standard; 567 t normal; 610 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (213.25 ft / 213.25 ft) x 22.97 ft x (9.84 / 10.33 ft)
   (65.00 m / 65.00 m) x 7.00 m  x (3.00 / 3.15 m)

Armament:
      1 - 2.95" / 75.0 mm 45.0 cal gun - 12.98lbs / 5.89kg shells, 100 per gun
     Quick firing gun in deck mount, 1897 Model
     1 x Single mount on centreline, aft deck centre
      1 raised mount aft
      6 - 1.77" / 45.0 mm 45.0 cal guns - 3.31lbs / 1.50kg shells, 150 per gun
     Quick firing guns in deck mounts, 1897 Model
     6 x Single mounts on sides, evenly spread
      Weight of broadside 33 lbs / 15 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.59" / 15 mm         -               -
   2nd:   0.59" / 15 mm         -               -

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 11,500 ihp / 8,579 Kw = 27.22 kts
   Range 2,000nm at 10.00 kts
   Bunker at max displacement = 96 tons (100% coal)
     Caution: Delicate, lightweight machinery

Complement:
   57 - 75

Cost:
   £0.068 million / $0.274 million

Distribution of weights at normal displacement:
   Armament: 6 tons, 1.1 %
      - Guns: 6 tons, 1.1 %
   Armour: 9 tons, 1.7 %
      - Armament: 9 tons, 1.7 %
   Machinery: 352 tons, 62.2 %
   Hull, fittings & equipment: 116 tons, 20.4 %
   Fuel, ammunition & stores: 67 tons, 11.8 %
   Miscellaneous weights: 16 tons, 2.8 %
      - On freeboard deck: 16 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     98 lbs / 44 Kg = 7.6 x 3.0 " / 75 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.33
   Metacentric height 0.9 ft / 0.3 m
   Roll period: 10.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.08
   Seaboat quality  (Average = 1.00): 0.61

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.412 / 0.422
   Length to Beam Ratio: 9.29 : 1
   'Natural speed' for length: 14.60 kts
   Power going to wave formation at top speed: 70 %
   Trim (Max stability = 0, Max steadiness = 100): 82
   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 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Forward deck:   30.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Aft deck:   35.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Quarter deck:   15.00 %,  8.20 ft / 2.50 m,  8.20 ft / 2.50 m
      - Average freeboard:      8.20 ft / 2.50 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 203.3 %
      - Above water (accommodation/working, high = better): 83.2 %
   Waterplane Area: 3,036 Square feet or 282 Square metres
   Displacement factor (Displacement / loading): 15 %
   Structure weight / hull surface area: 22 lbs/sq ft or 106 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.28
      - Overall: 0.55
   Extremely poor machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Caution: Lacks seaworthiness - very limited seakeeping ability

Misc Distribution
--On Deck (16t)
----6t 4x350mm Torpedos [Two single tube mounts per side]
----5t Improved spray protections for Torpedo tubes
----5t Construction Reserve.