WesWorld

Submarines up to 2000 tons standard

Sb Class, Iberia Submarine (Ocean) laid down 1929

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Displacement:
839 t light; 864 t standard; 983 t normal; 1,079 t full load

Dimensions: Length overall / water x beam x draught
203.41 ft / 203.41 ft x 19.69 ft (Bulges 26.25 ft) x 16.40 ft (normal load)
62.00 m / 62.00 m x 6.00 m (Bulges 8.00 m) x 5.00 m

Armament:
2 - 3.94" / 100 mm guns in single mounts, 30.51lbs / 13.84kg shells, 1929 Model
Breech loading guns in deck mounts
on centreline, all amidships, all raised mounts - superfiring
2 - 0.98" / 25.0 mm guns (1x2 guns), 0.48lbs / 0.22kg shells, 1929 Model
Breech loading guns in deck mount
on centreline aft, all raised guns - superfiring
2 - 0.53" / 13.5 mm guns in single mounts, 0.08lbs / 0.04kg shells, 1929 Model
Breech loading guns in deck mounts
on side, all amidships, all raised mounts - superfiring
Weight of broadside 62 lbs / 28 kg
Shells per gun, main battery: 150
2 - 21.0" / 533.4 mm above water torpedoes, 5 - 21.0" / 533.4 mm submerged torpedo tubes

Machinery:
Diesel Internal combustion generators plus batteries,
Electric motors, 2 shafts, 1,963 shp / 1,464 Kw = 16.00 kts
Range 9,000nm at 10.00 kts
Bunker at max displacement = 215 tons

Complement:
87 - 114

Cost:
£0.177 million / $0.709 million

Distribution of weights at normal displacement:
Armament: 8 tons, 0.8 %
Machinery: 60 tons, 6.1 %
Hull, fittings & equipment: 546 tons, 55.5 %
Fuel, ammunition & stores: 144 tons, 14.7 %
Miscellaneous weights: 225 tons, 22.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
582 lbs / 264 Kg = 19.1 x 3.9 " / 100 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.03
Metacentric height 0.5 ft / 0.1 m
Roll period: 16.2 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: 0.393
Length to Beam Ratio: 7.75 : 1
'Natural speed' for length: 14.26 kts
Power going to wave formation at top speed: 45 %
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: 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): 85.7 %
- Above water (accommodation/working, high = better): 0.0 %
Waterplane Area: 2,456 Square feet or 228 Square metres
Displacement factor (Displacement / loading): 241 %
Structure weight / hull surface area: 120 lbs/sq ft or 584 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 3.26
- Longitudinal: 3.05
- Overall: 3.10
Hull space for machinery, storage, compartmentation is adequate
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

Operational depth: 310'
Emergency depth: 496'
Crush depth: 775'

Sd Class, Iberia Submarine (Ocean) laid down 1935

Sd 1 to Sd 28


Displacement:
1,447 t light; 1,483 t standard; 1,621 t normal; 1,731 t full load

Dimensions: Length overall / water x beam x draught
199.15 ft / 196.85 ft x 18.04 ft (Bulges 21.33 ft) x 13.94 ft (normal load)
60.70 m / 60.00 m x 5.50 m (Bulges 6.50 m) x 4.25 m

Armament:
2 - 3.94" / 100 mm guns in single mounts, 30.51lbs / 13.84kg shells, 1935 Model
Breech loading guns in deck mounts
on centreline, all amidships
2 - 0.98" / 25.0 mm guns (1x2 guns), 0.48lbs / 0.22kg shells, 1935 Model
Anti-aircraft guns in deck mount
on centreline amidships, all raised guns - superfiring
2 - 0.53" / 13.5 mm guns in single mounts, 0.08lbs / 0.04kg shells, 1935 Model
Machine guns in deck mounts
on side, all amidships, all raised mounts - superfiring
Weight of broadside 62 lbs / 28 kg
Shells per gun, main battery: 100
2 - 21.0" / 533.4 mm above water torpedoes, 6 - 21.0" / 533.4 mm submerged torpedo tubes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.59" / 15 mm 0.59" / 15 mm -

- Conning tower: 0.59" / 15 mm

Machinery:
Diesel Internal combustion generators plus batteries,
Electric motors, 2 shafts, 5,093 shp / 3,800 Kw = 18.00 kts
Range 8,000nm at 10.00 kts
Bunker at max displacement = 248 tons

Complement:
127 - 166

Cost:
£0.394 million / $1.577 million

Distribution of weights at normal displacement:
Armament: 8 tons, 0.5 %
Armour: 5 tons, 0.3 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 4 tons, 0.2 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 2 tons, 0.1 %
Machinery: 145 tons, 8.9 %
Hull, fittings & equipment: 989 tons, 61.0 %
Fuel, ammunition & stores: 174 tons, 10.7 %
Miscellaneous weights: 300 tons, 18.5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
489 lbs / 222 Kg = 16.0 x 3.9 " / 100 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.02
Metacentric height 0.4 ft / 0.1 m
Roll period: 14.2 seconds
Steadiness - As gun platform (Average = 50 %): 5 %
- Recoil effect (Restricted arc if above 1.00): 0.02
Seaboat quality (Average = 1.00): 0.01

Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.969
Length to Beam Ratio: 9.23 : 1
'Natural speed' for length: 14.03 kts
Power going to wave formation at top speed: 67 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 35.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 3.28 ft / 1.00 m
- Forecastle (15 %): 3.28 ft / 1.00 m (1.64 ft / 0.50 m aft of break)
- Mid (60 %): 1.64 ft / 0.50 m
- Quarterdeck (15 %): 0.00 ft / 0.00 m
- Stern: 0.00 ft / 0.00 m
- Average freeboard: 1.44 ft / 0.44 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 134.6 %
- Above water (accommodation/working, high = better): 4.4 %
Waterplane Area: 3,547 Square feet or 330 Square metres
Displacement factor (Displacement / loading): 247 %
Structure weight / hull surface area: 172 lbs/sq ft or 842 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 5.44
- Longitudinal: 3.14
- Overall: 3.61
Hull space for machinery, storage, compartmentation is cramped
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

Diving depth = 361'
Emergency dive = 577'
Crush depth = 902'

2 bow tubes are mounted in the upper works above the pressure vessel, and are not reloadable underway.