Minecruiser

[ledeper]

Hero Class, Baltic Confederation Minecruiser laid down 1908

Displacement:
   5.553 t light; 5.735 t standard; 6.734 t normal; 7.533 t full load

Dimensions: Length overall / water x beam x draught
   503,51 ft / 492,13 ft x 47,57 ft x 19,69 ft (normal load)
   153,47 m / 150,00 m x 14,50 m  x 6,00 m

Armament:
      5 - 6,00" / 152 mm guns in single mounts, 108,00lbs / 48,99kg shells, 1908 Model
     Breech loading guns in deck mounts with hoists
     on centreline ends, majority forward, 2 raised mounts - superfiring
      8 - 1,57" / 40,0 mm guns (4x2 guns), 1,95lbs / 0,89kg shells, 1908 Model
     Breech loading guns in deck mounts
     on side, all amidships
   Weight of broadside 556 lbs / 252 kg
   Shells per gun, main battery: 150

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   5,00" / 127 mm   385,50 ft / 117,50 m   8,27 ft / 2,52 m
   Ends:   2,00" / 51 mm   172,21 ft / 52,49 m   8,27 ft / 2,52 m
   Upper:   2,00" / 51 mm   319,88 ft / 97,50 m   8,01 ft / 2,44 m
     Main Belt covers 121 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   4,00" / 102 mm         -               -
   2nd:   2,00" / 51 mm         -               -

Machinery:
   Coal fired boilers, steam turbines,
   Electric motors, 3 shafts, 35.323 shp / 26.351 Kw = 26,86 kts
   Range 4.500nm at 14,00 kts
   Bunker at max displacement = 1.798 tons (100% coal)

Complement:
   371 - 483

Cost:
   £0,527 million / $2,110 million

Distribution of weights at normal displacement:
   Armament: 69 tons, 1,0 %
   Armour: 1.042 tons, 15,5 %
      - Belts: 962 tons, 14,3 %
      - Torpedo bulkhead: 0 tons, 0,0 %
      - Armament: 80 tons, 1,2 %
      - Armour Deck: 0 tons, 0,0 %
      - Conning Tower: 0 tons, 0,0 %
   Machinery: 1.962 tons, 29,1 %
   Hull, fittings & equipment: 2.079 tons, 30,9 %
   Fuel, ammunition & stores: 1.181 tons, 17,5 %
   Miscellaneous weights: 400 tons, 5,9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     6.307 lbs / 2.861 Kg = 58,4 x 6,0 " / 152 mm shells or 1,1 torpedoes
   Stability (Unstable if below 1.00): 1,20
   Metacentric height 2,3 ft / 0,7 m
   Roll period: 13,2 seconds
   Steadiness   - As gun platform (Average = 50 %): 64 %
         - Recoil effect (Restricted arc if above 1.00): 0,26
   Seaboat quality  (Average = 1.00): 1,28

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,511
   Length to Beam Ratio: 10,34 : 1
   'Natural speed' for length: 22,18 kts
   Power going to wave formation at top speed: 52 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 25,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      24,41 ft / 7,44 m
      - Forecastle (20 %):   15,52 ft / 4,73 m
      - Mid (50 %):      15,52 ft / 4,73 m
      - Quarterdeck (15 %):   15,52 ft / 4,73 m
      - Stern:      15,52 ft / 4,73 m
      - Average freeboard:   16,23 ft / 4,95 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 109,2 %
      - Above water (accommodation/working, high = better): 125,6 %
   Waterplane Area: 15.762 Square feet or 1.464 Square metres
   Displacement factor (Displacement / loading): 114 %
   Structure weight / hull surface area: 77 lbs/sq ft or 376 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,97
      - Longitudinal: 1,30
      - Overall: 1,00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent
   Good seaboat, rides out heavy weather easily

Room for 60 mines

Clm     BSC  Clas Horn to fleet Aug 1910

[ledeper]

Improved Hero-Class, Baltic Confederation  ligth cruisers laid down 1912

Displacement:
   6.177 t light; 6.402 t standard; 6.947 t normal; 7.383 t full load

Dimensions: Length overall / water x beam x draught
   485,76 ft / 475,72 ft x 49,21 ft x 21,33 ft (normal load)
   148,06 m / 145,00 m x 15,00 m  x 6,50 m

Armament:
      8 - 6,00" / 152 mm guns (4x2 guns), 108,00lbs / 48,99kg shells, 1912 Model
     Breech loading guns in deck mounts with hoists
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      4 - 4,00" / 102 mm guns in single mounts, 32,00lbs / 14,51kg shells, 1912 Model
     Quick firing guns in deck mounts
     on side, all amidships
      4 - 1,57" / 40,0 mm guns in single mounts, 1,95lbs / 0,89kg shells, 1912 Model
     Breech loading guns in deck mounts
     on side, evenly spread
   Weight of broadside 1.000 lbs / 454 kg
   Shells per gun, main battery: 150

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   6,00" / 152 mm   363,35 ft / 110,75 m   8,42 ft / 2,57 m
   Ends:   Unarmoured
   Upper:   2,00" / 51 mm   330,54 ft / 100,75 m   8,00 ft / 2,44 m
     Main Belt covers 118 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1,00" / 25 mm   1,00" / 25 mm            -
   2nd:   0,50" / 13 mm         -               -
   3rd:   0,50" / 13 mm         -               -

   - Armour deck: 2,00" / 51 mm, Conning tower: 6,00" / 152 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 3 shafts, 49.548 shp / 36.962 Kw = 29,00 kts
   Range 4.000nm at 14,00 kts
   Bunker at max displacement = 980 tons

Complement:
   379 - 494

Cost:
   £0,598 million / $2,391 million

Distribution of weights at normal displacement:
   Armament: 125 tons, 1,8 %
   Armour: 1.623 tons, 23,4 %
      - Belts: 965 tons, 13,9 %
      - Torpedo bulkhead: 0 tons, 0,0 %
      - Armament: 40 tons, 0,6 %
      - Armour Deck: 570 tons, 8,2 %
      - Conning Tower: 47 tons, 0,7 %
   Machinery: 1.976 tons, 28,4 %
   Hull, fittings & equipment: 2.254 tons, 32,4 %
   Fuel, ammunition & stores: 770 tons, 11,1 %
   Miscellaneous weights: 200 tons, 2,9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     6.253 lbs / 2.836 Kg = 57,9 x 6,0 " / 152 mm shells or 1,1 torpedoes
   Stability (Unstable if below 1.00): 1,17
   Metacentric height 2,3 ft / 0,7 m
   Roll period: 13,6 seconds
   Steadiness   - As gun platform (Average = 50 %): 53 %
         - Recoil effect (Restricted arc if above 1.00): 0,40
   Seaboat quality  (Average = 1.00): 1,05

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,487
   Length to Beam Ratio: 9,67 : 1
   'Natural speed' for length: 21,81 kts
   Power going to wave formation at top speed: 57 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 25,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      21,52 ft / 6,56 m
      - Forecastle (20 %):   15,78 ft / 4,81 m
      - Mid (50 %):      15,78 ft / 4,81 m
      - Quarterdeck (15 %):   15,78 ft / 4,81 m
      - Stern:      15,78 ft / 4,81 m
      - Average freeboard:   16,24 ft / 4,95 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 109,5 %
      - Above water (accommodation/working, high = better): 122,3 %
   Waterplane Area: 15.417 Square feet or 1.432 Square metres
   Displacement factor (Displacement / loading): 103 %
   Structure weight / hull surface area: 85 lbs/sq ft or 414 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,95
      - Longitudinal: 1,62
      - Overall: 1,00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent

Named after Naval Heroes:Juel,Adeler,
Room for 60 mines
Clm 2 Wachtmeister,
Clm 3 Trolle,
Clm 4 Tordenskjold.to Fleet Jun14