Trade Protection Cruisers

[Earl822]

Trade Protection Cruisers of the Royal Navy, of the United Norman Kingdom

[Earl822]

Tuna Class, ACM Trade Heavy Cruiser  laid down 1892

Displacement:
   4,767 t light; 4,973 t standard; 6,004 t normal; 6,828 t full load

Dimensions: Length overall / water x beam x draught
   375.00 ft / 375.00 ft x 55.00 ft x 18.00 ft (normal load)
   114.30 m / 114.30 m x 16.76 m  x 5.49 m

Armament:
      4 - 6.00" / 152 mm guns (2x2 guns), 108.00lbs / 48.99kg shells, 1892 Model
     Breech loading guns in turrets (on barbettes)
     on side ends, evenly spread
      8 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1892 Model
     Breech loading guns in deck mounts
     on side, all amidships
      6 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1892 Model
     Quick firing guns in deck mounts
     on side, evenly spread
      4 - 0.30" / 7.6 mm guns in single mounts, 0.01lbs / 0.00kg shells, 1892 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 1,377 lbs / 625 kg
   Shells per gun, main battery: 100
   6 - 16.0" / 406.4 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   5.00" / 127 mm   300.00 ft / 91.44 m   8.00 ft / 2.44 m
   Ends:   3.00" / 76 mm     75.00 ft / 22.86 m   8.00 ft / 2.44 m
     Main Belt covers 123 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   5.00" / 127 mm   3.00" / 76 mm      3.00" / 76 mm
   2nd:   3.00" / 76 mm         -               -

   - Armour deck: 0.50" / 13 mm, Conning tower: 3.00" / 76 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 8,429 ihp / 6,288 Kw = 18.19 kts
   Range 9,000nm at 10.00 kts
   Bunker at max displacement = 1,856 tons (100% coal)

Complement:
   340 - 443

Cost:
   £0.522 million / $2.089 million

Distribution of weights at normal displacement:
   Armament: 172 tons, 2.9 %
   Armour: 905 tons, 15.1 %
      - Belts: 564 tons, 9.4 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 185 tons, 3.1 %
      - Armour Deck: 135 tons, 2.3 %
      - Conning Tower: 21 tons, 0.4 %
   Machinery: 1,505 tons, 25.1 %
   Hull, fittings & equipment: 1,834 tons, 30.5 %
   Fuel, ammunition & stores: 1,237 tons, 20.6 %
   Miscellaneous weights: 350 tons, 5.8 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     5,535 lbs / 2,511 Kg = 51.2 x 6.0 " / 152 mm shells or 1.1 torpedoes
   Stability (Unstable if below 1.00): 1.45
   Metacentric height 3.9 ft / 1.2 m
   Roll period: 11.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 80 %
         - Recoil effect (Restricted arc if above 1.00): 0.21
   Seaboat quality  (Average = 1.00): 1.61

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.566
   Length to Beam Ratio: 6.82 : 1
   'Natural speed' for length: 19.36 kts
   Power going to wave formation at top speed: 45 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      16.00 ft / 4.88 m
      - Forecastle (20 %):   12.00 ft / 3.66 m
      - Mid (50 %):      12.00 ft / 3.66 m
      - Quarterdeck (15 %):   12.00 ft / 3.66 m
      - Stern:      12.00 ft / 3.66 m
      - Average freeboard:   12.32 ft / 3.76 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 109.4 %
      - Above water (accommodation/working, high = better): 86.8 %
   Waterplane Area: 14,612 Square feet or 1,357 Square metres
   Displacement factor (Displacement / loading): 106 %
   Structure weight / hull surface area: 87 lbs/sq ft or 427 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.43
      - Overall: 1.01
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is cramped
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

For Sale 1st Jan 1906

[Earl822]

Cod Class, ACM Trade Protected Cruiser laid down 1895

Displacement:
   3,107 t light; 3,233 t standard; 3,998 t normal; 4,611 t full load

Dimensions: Length overall / water x beam x draught
   350.00 ft / 350.00 ft x 40.00 ft x 17.00 ft (normal load)
   106.68 m / 106.68 m x 12.19 m  x 5.18 m

Armament:
      2 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1895 Model
     Breech loading guns in deck mounts
     on centreline ends, evenly spread
      4 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1895 Model
     Breech loading guns in deck mounts
     on side, all amidships
      6 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1895 Model
     Quick firing guns in deck mounts
     on side, evenly spread
      4 - 0.30" / 7.6 mm guns in single mounts, 0.01lbs / 0.00kg shells, 1895 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 729 lbs / 331 kg
   Shells per gun, main battery: 100
   2 - 20.0" / 508 mm submerged torpedo tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.00" / 76 mm   300.00 ft / 91.44 m   8.00 ft / 2.44 m
   Ends:   1.00" / 25 mm     50.00 ft / 15.24 m   8.00 ft / 2.44 m
     Main Belt covers 132 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   3.00" / 76 mm         -               -
   2nd:   3.00" / 76 mm         -               -

   - Armour deck: 0.50" / 13 mm, Conning tower: 3.00" / 76 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 6,989 ihp / 5,214 Kw = 18.48 kts
   Range 9,000nm at 10.00 kts
   Bunker at max displacement = 1,378 tons (100% coal)

Complement:
   250 - 326

Cost:
   £0.351 million / $1.405 million

Distribution of weights at normal displacement:
   Armament: 91 tons, 2.3 %
   Armour: 479 tons, 12.0 %
      - Belts: 306 tons, 7.6 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 63 tons, 1.6 %
      - Armour Deck: 94 tons, 2.3 %
      - Conning Tower: 16 tons, 0.4 %
   Machinery: 1,185 tons, 29.6 %
   Hull, fittings & equipment: 1,053 tons, 26.3 %
   Fuel, ammunition & stores: 892 tons, 22.3 %
   Miscellaneous weights: 300 tons, 7.5 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2,609 lbs / 1,184 Kg = 24.2 x 6.0 " / 152 mm shells or 0.6 torpedoes
   Stability (Unstable if below 1.00): 1.36
   Metacentric height 2.2 ft / 0.7 m
   Roll period: 11.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 87 %
         - Recoil effect (Restricted arc if above 1.00): 0.26
   Seaboat quality  (Average = 1.00): 1.74

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.588
   Length to Beam Ratio: 8.75 : 1
   'Natural speed' for length: 18.71 kts
   Power going to wave formation at top speed: 45 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      17.00 ft / 5.18 m
      - Forecastle (20 %):   12.00 ft / 3.66 m
      - Mid (50 %):      12.00 ft / 3.66 m
      - Quarterdeck (15 %):   12.00 ft / 3.66 m
      - Stern:      12.00 ft / 3.66 m
      - Average freeboard:   12.40 ft / 3.78 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 128.8 %
      - Above water (accommodation/working, high = better): 92.6 %
   Waterplane Area: 10,125 Square feet or 941 Square metres
   Displacement factor (Displacement / loading): 103 %
   Structure weight / hull surface area: 63 lbs/sq ft or 310 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.48
      - Overall: 0.99
   Caution: Hull subject to strain in open-sea
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is adequate
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

For sale as of 1st Jan 1906