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warpath_33

Hawksbill-Class Heavy Cruiser (fiction)

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The Hawksbill-class cruisers were a class of four heavy cruisers built for the Royal [Redacted] Navy from from 1931 to 1932. The four ships of class were called Hawksbill, Leatherback, Loggerhead, and Flatback.

QnV4o2p.png

 

Specifications (as built):

Three screws with single rudder

Speed: 32.5 knots

14700km operational range

 

Armour:

120mm main belt

50mm main deck

40mm box around citadel, turtlebacked

120mm turret faces

76mm turret sides

90mm turret rear

76mm turret roofs

76mm barbettes

45mm barbette roofs

Superstructure, bow and stern not armoured

 

Armament (as built):

4x2 203mm L/50 guns ABXY layout

2x4 533mm torpedo tubes

7x2 120mm L/45 guns (dual purpose)

 

Anti-aircraft Armament (as built):

6x3 25mm triple L/70 in turrets with 35mm all round armour

4x1 12.7mm machine guns

4x2 12.7mm machine guns

 

Aviation Facilities:

2 catapults

1x CLF29 fighter or 1x CLS27 two seater scout

 

In 1938, the four ships received refits improving anti-aircraft firepower and replacing the secondary battery with new 127mm guns that had significantly improved performance characteristics compared to the older 120mm guns.

DNNno5r.png

 

Armament (post refit):

4x2 203mm L/50 guns ABXY layout

2x4 533mm torpedo tubes

6x2 127mm L/45 guns (dual purpose)

 

Anti-aircraft Armament (post refit):

8x3 25mm triple L/70

6x3 25mm triple L/70 in turrets with 35mm all round armour

20x1 20mm Oerlikon

12x2 20mm Oerlikon

 

The ships received schemes in standard RPN daylight colours after the refit.

EJIRgdZ.png

 

The four ships made up the Second Cruiser Squadron.

 

Service Record of the Second Cruiser Squadron:

 

Formed in 1933

Federal Republic of [Redacted] joins World War II on the side of the allies in November 1939

Patrolled Atlantic convoy routes 1939-early 1941

Sent to Pacific late 1941 and made part of the First Pacific Fleet

All four ships participated at the Battle of Ponape mid 1943, Loggerhead sank during the battle

Remaining three ships scrapped between 1951 and 1954

 

Report (Springsharp)

Spoiler

Hawksbill, [Redacted] Heavy Cruiser laid down 1931

Displacement:
    10,509 t light; 11,109 t standard; 12,898 t normal; 14,330 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
    (643.06 ft / 630.94 ft) x 67.26 ft x (20.34 / 22.08 ft)
    (196.00 m / 192.31 m) x 20.50 m  x (6.20 / 6.73 m)

Armament:
      8 - 7.99" / 203 mm 50.0 cal guns - 270.21lbs / 122.57kg shells, 200 per gun
      Breech loading guns in turret on barbette mounts, 1930 Model
      4 x 2-gun mounts on centreline ends, evenly spread
        2 raised mounts - superfiring
      12 - 5.00" / 127 mm 45.0 cal guns - 63.03lbs / 28.59kg shells, 180 per gun
      Dual purpose guns in deck and hoist mounts, 1931 Model
      6 x 2-gun mounts on side ends, majority forward
      24 - 0.98" / 25.0 mm 70.0 cal guns - 0.53lbs / 0.24kg shells, 750 per gun
      Anti-air guns in deck mounts, 1929 Model
      8 x Triple mounts on sides, evenly spread
        6 raised mounts
      18 - 0.98" / 25.0 mm 70.0 cal guns - 0.53lbs / 0.24kg shells, 800 per gun
      Anti-air guns in deck mounts, 1929 Model
      6 x Single mounts on sides, evenly spread
        6 raised mounts
      44 - 0.79" / 20.0 mm 70.0 cal guns - 0.27lbs / 0.12kg shells, 600 per gun
      Anti-air guns in deck mounts, 1931 Model
      12 x Twin mounts on sides, evenly spread
        12 raised mounts
      20 x Single mounts on sides amidships
        6 raised mounts
      Weight of broadside 2,952 lbs / 1,339 kg
      8 - 21.0" / 533 mm, 22.31 ft / 6.80 m torpedoes - 1.482 t each, 11.852 t total
    In 2 sets of deck mounted side rotating tubes

Armour:
   - Belts:        Width (max)    Length (avg)        Height (avg)
    Main:    4.72" / 120 mm    441.63 ft / 134.61 m    9.88 ft / 3.01 m
    Ends:    Unarmoured
      Main Belt covers 108 % of normal length
      Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
        0.32" / 8 mm    441.63 ft / 134.61 m    15.94 ft / 4.86 m

   - Gun armour:    Face (max)    Other gunhouse (avg)    Barbette/hoist (max)
    Main:    4.72" / 120 mm    3.17" / 81 mm        2.99" / 76 mm
    2nd:    0.98" / 25 mm    0.79" / 20 mm        0.79" / 20 mm
    4th:    1.38" / 35 mm          -                  -

   - Box over machinery & magazines: 1.97" / 50 mm

Machinery:
    Oil fired boilers, steam turbines, 
    Geared drive, 3 shafts, 104,711 shp / 78,114 Kw = 32.50 kts
    Range 7,937nm at 18.00 kts
    Bunker at max displacement = 3,222 tons

Complement:
    604 - 786

Cost:
    £4.840 million / $19.361 million

Distribution of weights at normal displacement:
    Armament: 915 tons, 7.1 %
       - Guns: 904 tons, 7.0 %
       - Torpedoes: 12 tons, 0.1 %
    Armour: 1,417 tons, 11.0 %
       - Belts: 839 tons, 6.5 %
       - Torpedo bulkhead: 82 tons, 0.6 %
       - Armament: 423 tons, 3.3 %
       - Armour Deck: 73 tons, 0.6 %
    Machinery: 3,131 tons, 24.3 %
    Hull, fittings & equipment: 5,046 tons, 39.1 %
    Fuel, ammunition & stores: 2,389 tons, 18.5 %
    Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
    Survivability (Non-critical penetrating hits needed to sink ship):
      14,341 lbs / 6,505 Kg = 56.2 x 8.0 " / 203 mm shells or 2.0 torpedoes
    Stability (Unstable if below 1.00): 1.00
    Metacentric height 2.8 ft / 0.8 m
    Roll period: 17.0 seconds
    Steadiness    - As gun platform (Average = 50 %): 76 %
            - Recoil effect (Restricted arc if above 1.00): 0.71
    Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
    Hull has raised forecastle,
      a normal bow and a round stern
    Block coefficient (normal/deep): 0.523 / 0.535
    Length to Beam Ratio: 9.38 : 1
    'Natural speed' for length: 25.12 kts
    Power going to wave formation at top speed: 57 %
    Trim (Max stability = 0, Max steadiness = 100): 75
    Bow angle (Positive = bow angles forward): 14.00 degrees
    Stern overhang: 5.58 ft / 1.70 m
    Freeboard (% = length of deck as a percentage of waterline length):
                Fore end,     Aft end
       - Forecastle:    15.00 %,  26.25 ft / 8.00 m,  22.97 ft / 7.00 m
       - Forward deck:    30.00 %,  21.33 ft / 6.50 m,  19.69 ft / 6.00 m
       - Aft deck:    40.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
       - Quarter deck:    15.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
       - Average freeboard:        20.62 ft / 6.29 m
    Ship tends to be wet forward

Ship space, strength and comments:
    Space    - Hull below water (magazines/engines, low = better): 144.3 %
        - Above water (accommodation/working, high = better): 179.0 %
    Waterplane Area: 28,878 Square feet or 2,683 Square metres
    Displacement factor (Displacement / loading): 122 %
    Structure weight / hull surface area: 127 lbs/sq ft or 618 Kg/sq metre
    Hull strength (Relative):
        - Cross-sectional: 1.04
        - Longitudinal: 1.27
        - Overall: 1.06
    Hull space for machinery, storage, compartmentation is cramped
    Room for accommodation and workspaces is excellent
    Ship has slow, easy roll, a good, steady gun platform
 

 

Edited by warpath_33
Added report
  • Cool 2

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1 minute ago, Incendiary_Tanker said:

@warpath_33 Does she have an open or closed bridge? This is very important. 

 

 

The bridge is closed, though there is also a flying bridge atop it. (a bit like the bridge on Fiji or maybe Myoko)

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4 minutes ago, warpath_33 said:

The bridge is closed, though there is also a flying bridge atop it. (a bit like the bridge on Fiji or maybe Myoko)

Thank god, open bridges are the worst.

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