School/Cadet ship

[ledeper]

School/Cadet ship, Gorch Fock BCS Ligth Cruiser type laid down 1917 (Engine 1916)

Displacement:
   4.233 t light; 4.379 t standard; 5.544 t normal; 6.476 t full load

Dimensions: Length overall / water x beam x draught
   478,61 ft / 475,72 ft x 42,65 ft x 18,04 ft (normal load)
   145,88 m / 145,00 m x 13,00 m  x 5,50 m

Armament:
     2 - 5,91" / 150 mm guns (1x2 guns), 102,98lbs / 46,71kg shells, 1917 Model
     Quick firing guns in a deck mount with hoist
     on centreline forward
     1 - 5,91" / 150 mm guns in single mounts, 102,98lbs / 46,71kg shells, 1917 Model
     Quick firing gun in a deck mount with hoist
     on centreline forward, 1 raised gun
     2 - 3,94" / 100 mm guns in single mounts, 30,51lbs / 13,84kg shells, 1917 Model
     Quick firing guns in deck mounts
     on centreline, all aft, 1 raised mount
     4 - 1,57" / 40,0 mm guns (2x2 guns), 1,95lbs / 0,88kg shells, 1917 Model
     Anti-aircraft guns in deck mounts
     on side, evenly spread, 1 raised mount
     2 - 0,79" / 20,0 mm guns in single mounts, 0,24lbs / 0,11kg shells, 1917 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 378 lbs / 172 kg
   Shells per gun, main battery: 150
   2 - 18,0" / 457,2 mm above water torpedoes

Armour:
  - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3,94" / 100 mm   356,79 ft / 108,75 m   7,84 ft / 2,39 m
   Ends:   Unarmoured
   Upper:   1,97" / 50 mm   356,79 ft / 108,75 m   8,01 ft / 2,44 m
     Main Belt covers 115 % of normal length

  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0,98" / 25 mm   0,98" / 25 mm      0,98" / 25 mm

  - Armour deck: 1,97" / 50 mm, Conning tower: 3,94" / 100 mm

Machinery:
   Diesel Internal combustion motors,
   Electric cruising motors plus geared drives, 3 shafts, 27.854 shp / 20.779 Kw = 26,00 kts
   Range 12.000nm at 14,00 kts
   Bunker at max displacement = 2.097 tons

Complement:
   320 - 417

Cost:
   £0,606 million / $2,423 million

Distribution of weights at normal displacement:
   Armament: 47 tons, 0,9 %
   Armour: 1.215 tons, 21,9 %
      - Belts: 674 tons, 12,2 %
      - Torpedo bulkhead: 0 tons, 0,0 %
      - Armament: 9 tons, 0,2 %
      - Armour Deck: 506 tons, 9,1 %
      - Conning Tower: 27 tons, 0,5 %
   Machinery: 1.038 tons, 18,7 %
   Hull, fittings & equipment: 1.633 tons, 29,5 %
   Fuel, ammunition & stores: 1.311 tons, 23,6 %
   Miscellaneous weights: 300 tons, 5,4 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     8.066 lbs / 3.658 Kg = 78,3 x 5,9 " / 150 mm shells or 1,6 torpedoes
   Stability (Unstable if below 1.00): 1,20
   Metacentric height 2,0 ft / 0,6 m
   Roll period: 12,8 seconds
   Steadiness   - As gun platform (Average = 50 %): 61 %
         - Recoil effect (Restricted arc if above 1.00): 0,21
   Seaboat quality  (Average = 1.00): 1,22

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,530
   Length to Beam Ratio: 11,15 : 1
   'Natural speed' for length: 21,81 kts
   Power going to wave formation at top speed: 50 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 10,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      16,40 ft / 5,00 m
      - Forecastle (10 %):   13,58 ft / 4,14 m
      - Mid (50 %):      13,58 ft / 4,14 m
      - Quarterdeck (15 %):   13,58 ft / 4,14 m
      - Stern:      13,58 ft / 4,14 m
      - Average freeboard:   13,70 ft / 4,17 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 74,1 %
      - Above water (accommodation/working, high = better): 106,8 %
   Waterplane Area: 13.898 Square feet or 1.291 Square metres
   Displacement factor (Displacement / loading): 140 %
   Structure weight / hull surface area: 70 lbs/sq ft or 342 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,99
      - Longitudinal: 1,10
      - Overall: 1,00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is adequate
   Good seaboat, rides out heavy weather easily

Misc Weigth :
L/R W/L 25 tns
torpedoes + 1 reload 10 tns
Accomodation for 50 Cadets 200 tns (4 tns pr cadet)
Classrooms 60 tns(enlarged superstucture)
Gunnery notes:
One twin 150 mm +one single 150 mm superfiring forward
2 sinle 100 mm Q.F one superfirng
carry only one tp reload