Little and Larger from the UNK

[Earl822]

The Royal Navy has decided in needs Submarines, or more to the point First Sea Lord Jackie Fisher has decided that the Navy, has decided it needs submarines. Anyhow, here is the A1, the Royal Navy's first submarine, Eventually I hope to build Subs like the E Class, but these will have to do. At least 10 will be built to this design if not more if funds are available.

SS A1 Class, United Kingdom Submarine laid down 1906

Displacement:
   200 t light; 206 t standard; 210 t normal; 213 t full load

Dimensions: Length overall / water x beam x draught
   125.00 ft / 125.00 ft x 18.65 ft x 7.00 ft (normal load)
   38.10 m / 38.10 m x 5.68 m  x 2.13 m

Armament:
      1 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1906 Model
     Quick firing gun in deck mount
     on centreline forward
   Weight of broadside 14 lbs / 6 kg
   Shells per gun, main battery: 150

Machinery:
   Petrol Internal combustion generators,
   Electric motors, 2 shafts, 249 shp / 186 Kw = 11.50 kts
   Range 1,500nm at 5.00 kts
   Bunker at max displacement = 8 tons

Complement:
   26 - 35

Cost:
   £0.011 million / $0.043 million

Distribution of weights at normal displacement:
   Armament: 2 tons, 0.8 %
   Machinery: 16 tons, 7.7 %
   Hull, fittings & equipment: 132 tons, 63.1 %
   Fuel, ammunition & stores: 10 tons, 4.5 %
   Miscellaneous weights: 50 tons, 23.8 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     206 lbs / 93 Kg = 15.2 x 3.0 " / 76 mm shells or 0.5 torpedoes
   Stability (Unstable if below 1.00): 1.30
   Metacentric height 0.6 ft / 0.2 m
   Roll period: 9.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 0 %
         - Recoil effect (Restricted arc if above 1.00): 0.00
   Seaboat quality  (Average = 1.00): 0.00

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.450
   Length to Beam Ratio: 6.70 : 1
   'Natural speed' for length: 11.18 kts
   Power going to wave formation at top speed: 44 %
   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:      0.00 ft / 0.00 m
      - Forecastle (20 %):   0.00 ft / 0.00 m
      - Mid (50 %):      0.00 ft / 0.00 m
      - Quarterdeck (15 %):   0.00 ft / 0.00 m
      - Stern:      0.00 ft / 0.00 m
      - Average freeboard:   0.00 ft / 0.00 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 58.1 %
      - Above water (accommodation/working, high = better): 0.0 %
   Waterplane Area: 1,487 Square feet or 138 Square metres
   Displacement factor (Displacement / loading): 219 %
   Structure weight / hull surface area: 74 lbs/sq ft or 360 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 3.71
      - Longitudinal: 1.68
      - Overall: 2.04
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is extremely poor
   Ship has quick, lively roll, not a steady gun platform
   Caution: Lacks seaworthiness - very limited seakeeping ability

-------------------------------------------------------------------------------------------------------

This is the likely form that the Cressy Class will take, note less marines.

Cressy Class, United Kingdom Armoured Cruiser laid down 1907 (Engine 1909)

Displacement:
   12,450 t light; 13,186 t standard; 14,942 t normal; 16,347 t full load

Dimensions: Length overall / water x beam x draught
   554.76 ft / 550.00 ft x 71.00 ft x 24.35 ft (normal load)
   169.09 m / 167.64 m x 21.64 m  x 7.42 m

Armament:
      9 - 9.20" / 234 mm guns (3x3 guns), 389.34lbs / 176.60kg shells, 1907 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, majority forward, 1 raised mount - superfiring
      8 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1907 Model
     Breech loading guns in casemate mounts
     on side, all forward
     8 guns in hull casemates - Limited use in heavy seas
      4 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1907 Model
     Quick firing guns in casemate mounts
     on side, all aft
      12 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1907 Model
     Quick firing guns in deck mounts
     on side, evenly spread, 4 raised mounts
      12 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1907 Model
     Machine guns in deck mounts
     on side, evenly spread, 6 raised mounts
   Weight of broadside 4,968 lbs / 2,253 kg
   Shells per gun, main battery: 150
   4 - 20.0" / 508 mm above water torpedoes, 2 - 20.0" / 508 mm submerged torpedo tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   9.00" / 229 mm   350.00 ft / 106.68 m   10.00 ft / 3.05 m
   Ends:   4.00" / 102 mm   200.00 ft / 60.96 m   10.00 ft / 3.05 m
   Upper:   4.00" / 102 mm   350.00 ft / 106.68 m   7.50 ft / 2.29 m
     Main Belt covers 98 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   8.00" / 203 mm   7.00" / 178 mm      7.00" / 178 mm
   2nd:   3.00" / 76 mm         -               -
   3rd:   0.50" / 13 mm         -               -

   - Armour deck: 2.00" / 51 mm, Conning tower: 10.00" / 254 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 45,562 shp / 33,989 Kw = 25.25 kts
   Range 10,296nm at 12.00 kts
   Bunker at max displacement = 3,161 tons

Complement:
   675 - 878

Cost:
   £1.247 million / $4.989 million

Distribution of weights at normal displacement:
   Armament: 621 tons, 4.2 %
   Armour: 4,308 tons, 28.8 %
      - Belts: 2,099 tons, 14.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 1,070 tons, 7.2 %
      - Armour Deck: 1,008 tons, 6.7 %
      - Conning Tower: 131 tons, 0.9 %
   Machinery: 2,071 tons, 13.9 %
   Hull, fittings & equipment: 5,250 tons, 35.1 %
   Fuel, ammunition & stores: 2,492 tons, 16.7 %
   Miscellaneous weights: 200 tons, 1.3 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     17,588 lbs / 7,978 Kg = 45.2 x 9.2 " / 234 mm shells or 2.3 torpedoes
   Stability (Unstable if below 1.00): 1.09
   Metacentric height 3.5 ft / 1.1 m
   Roll period: 15.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.59
   Seaboat quality  (Average = 1.00): 1.35

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.550
   Length to Beam Ratio: 7.75 : 1
   'Natural speed' for length: 23.45 kts
   Power going to wave formation at top speed: 51 %
   Trim (Max stability = 0, Max steadiness = 100): 52
   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:      27.00 ft / 8.23 m
      - Forecastle (40 %):   26.00 ft / 7.92 m
      - Mid (40 %):      26.00 ft / 7.92 m (16.00 ft / 4.88 m aft of break)
      - Quarterdeck (15 %):   16.00 ft / 4.88 m
      - Stern:      16.00 ft / 4.88 m
      - Average freeboard:   20.16 ft / 6.14 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 80.9 %
      - Above water (accommodation/working, high = better): 115.2 %
   Waterplane Area: 27,253 Square feet or 2,532 Square metres
   Displacement factor (Displacement / loading): 110 %
   Structure weight / hull surface area: 126 lbs/sq ft or 613 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.58
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is adequate
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

3 Ships Built-HMS Cressy, Hogue & Aboukir

200tons Misc weight is:-

25tons Full WT setup
150tons 1 Marine Company (100men @1.5t each)
50tons Extra Launches
25tons 6 torpedoes and 10 reloads

[Desertfox]

Interesting a submarine without torpedoes.