Light Cruisers of the Mark

[Ithekro]

Intended as the light escorts for the Asfolath Battleships Range and Firepower erre Major Considerations on these ships.  A Light Belted Cruiser due to her armaments and her thin armor compared to modern Belted Cruisers.

Named after Native Allied Nation.

(Designed by Tanthalas)

Klamath (originally named Forod Sul)
Modoc
Yaquina
Karok

Klamath, Rohan Light Cruiser laid down 1917 (Engine 1920)

Displacement:
   6,000 t light; 6,260 t standard; 7,530 t normal; 8,546 t full load

Dimensions: Length overall / water x beam x draught
   557.00 ft / 550.00 ft x 55.00 ft x 20.00 ft (normal load)
   169.77 m / 167.64 m x 16.76 m  x 6.10 m

Armament:
      12 - 6.00" / 152 mm guns (6x2 guns), 108.00lbs / 48.99kg shells, 1917 Model
     Quick firing guns in deck mounts with hoists
     on centreline, evenly spread, 3 raised mounts
      2 - 1.50" / 38.1 mm guns (1x2 guns), 1.69lbs / 0.77kg shells, 1917 Model
     Anti-aircraft guns in deck mount
     on centreline aft, all raised guns - superfiring
      4 - 1.50" / 38.1 mm guns (2x2 guns), 1.69lbs / 0.77kg shells, 1917 Model
     Anti-aircraft guns in deck mounts
     on side, all amidships, all raised mounts - superfiring
   Weight of broadside 1,306 lbs / 592 kg
   Shells per gun, main battery: 150

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.00" / 76 mm   385.00 ft / 117.35 m   10.00 ft / 3.05 m
   Ends:   Unarmoured
     Main Belt covers 108 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   2.00" / 51 mm   1.00" / 25 mm      1.00" / 25 mm
   2nd:   1.00" / 25 mm   0.50" / 13 mm            -
   3rd:   1.00" / 25 mm   0.50" / 13 mm            -

   - Armour deck: 1.00" / 25 mm, Conning tower: 3.00" / 76 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 54,673 shp / 40,786 Kw = 30.00 kts
   Range 6,135nm at 19.00 kts
   Bunker at max displacement = 2,286 tons

Complement:
   403 - 525

Cost:
   £1.118 million / $4.471 million

Distribution of weights at normal displacement:
   Armament: 163 tons, 2.2 %
   Armour: 921 tons, 12.2 %
      - Belts: 473 tons, 6.3 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 72 tons, 1.0 %
      - Armour Deck: 351 tons, 4.7 %
      - Conning Tower: 25 tons, 0.3 %
   Machinery: 1,912 tons, 25.4 %
   Hull, fittings & equipment: 2,816 tons, 37.4 %
   Fuel, ammunition & stores: 1,530 tons, 20.3 %
   Miscellaneous weights: 188 tons, 2.5 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     8,262 lbs / 3,748 Kg = 76.5 x 6.0 " / 152 mm shells or 1.3 torpedoes
   Stability (Unstable if below 1.00): 1.17
   Metacentric height 2.7 ft / 0.8 m
   Roll period: 14.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 76 %
         - Recoil effect (Restricted arc if above 1.00): 0.46
   Seaboat quality  (Average = 1.00): 1.17

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.436
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 23.45 kts
   Power going to wave formation at top speed: 52 %
   Trim (Max stability = 0, Max steadiness = 100): 65
   Bow angle (Positive = bow angles forward): 19.30 degrees
   Stern overhang: -4.50 ft / -1.37 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      20.00 ft / 6.10 m
      - Forecastle (20 %):   20.00 ft / 6.10 m
      - Mid (51 %):      20.00 ft / 6.10 m (12.00 ft / 3.66 m aft of break)
      - Quarterdeck (10 %):   12.00 ft / 3.66 m
      - Stern:      12.00 ft / 3.66 m
      - Average freeboard:   16.08 ft / 4.90 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 102.1 %
      - Above water (accommodation/working, high = better): 140.1 %
   Waterplane Area: 19,077 Square feet or 1,772 Square metres
   Displacement factor (Displacement / loading): 121 %
   Structure weight / hull surface area: 92 lbs/sq ft or 449 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.26
      - 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

188 tons Misc. Weight
100 tons FC
  25 tons Radar
  25 tons Marconi
  12 tons Crew Comfort
  25  tons Flying Boat X1
    1 tons Capitans Quarters

[Laertes]

Not intended as a criticism, but curious - what's the 3" armour intended to stop? Extreme-range heavy shells or close-range light shells?

- Laertes
(Is wondering if escorts need armour at all nowadays)

[Ithekro]

Destroyer gun fire from outside torpedo range.  Ships like this are designed to kill destroyers before they can launch torpedoes, so they need to be protected from destroyer gunfire to do their job.