WesWorld

Ok, along the plans to update the destroyer force there will be works to build some 8 submarines each two years. Of this eight submarines, three will be of an ocean-going type and five of a coastal-submarine type. As years go by ,the bassic designs will be updated to more modern standards.

The sixteen old K.1 submarines will be progressively retired from service and be used as training vessels for new crews as the new subs take their place

The three first submarines of the ocean-going class, class named O-1, will be started on Q2/28.


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O.1, Dutch Submarine laid down 1928

Displacement:
1.167 t light; 1.200 t standard; 1.531 t normal; 1.797 t full load

Dimensions: Length overall / water x beam x draught
214,57 ft / 214,57 ft x 26,25 ft x 19,00 ft (normal load)
65,40 m / 65,40 m x 8,00 m x 5,79 m

Armament:
1 - 4,13" / 105 mm guns in single mounts, 35,00lbs / 15,88kg shells, 1928 Model
Breech loading gun in deck mount
on centreline forward
1 - 0,79" / 20,0 mm guns in single mounts, 0,24lbs / 0,11kg shells, 1928 Model
Anti-aircraft gun in deck mount
on centreline aft, 1 raised gun
Weight of broadside 35 lbs / 16 kg
Shells per gun, main battery: 110
8 - 21,0" / 533,4 mm submerged torpedo tubes. Six forward, two aft

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0,79" / 20 mm - -
2nd: 0,79" / 20 mm - -

- Conning tower: 0,79" / 20 mm

Machinery:
Diesel Internal combustion generators plus batteries,
Electric motors, 2 shafts, 3.699 shp / 2.759 Kw = 17,50 kts
Range 12.500nm at 12,00 kts
Bunker at max displacement = 597 tons

Complement:
122 - 159

Cost:
£0,232 million / $0,927 million

Distribution of weights at normal displacement:
Armament: 4 tons, 0,3 %
Armour: 4 tons, 0,3 %
- Belts: 0 tons, 0,0 %
- Torpedo bulkhead: 0 tons, 0,0 %
- Armament: 2 tons, 0,1 %
- Armour Deck: 0 tons, 0,0 %
- Conning Tower: 2 tons, 0,1 %
Machinery: 115 tons, 7,5 %
Hull, fittings & equipment: 743 tons, 48,5 %
Fuel, ammunition & stores: 364 tons, 23,8 %
Miscellaneous weights: 300 tons, 19,6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
521 lbs / 236 Kg = 14,7 x 4,1 " / 105 mm shells or 0,4 torpedoes
Stability (Unstable if below 1.00): 1,02
Metacentric height 0,7 ft / 0,2 m
Roll period: 13,2 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: 0,501
Length to Beam Ratio: 8,18 : 1
'Natural speed' for length: 14,65 kts
Power going to wave formation at top speed: 53 %
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): 121,7 %
- Above water (accommodation/working, high = better): 0,0 %
Waterplane Area: 3.756 Square feet or 349 Square metres
Displacement factor (Displacement / loading): 269 %
Structure weight / hull surface area: 123 lbs/sq ft or 602 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 3,19
- Longitudinal: 3,22
- Overall: 3,20
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

Operational depth: 96m
Emergency diving depth: 153.6m
Crush depth: 240m
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The coastal sub , five of which will be started in 1928 looks like:

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K.17, Dutch Coastal Submarine laid down 1928

Displacement:
486 t light; 499 t standard; 563 t normal; 613 t full load

Dimensions: Length overall / water x beam x draught
147,64 ft / 147,64 ft x 17,06 ft (Bulges 21,33 ft) x 13,45 ft (normal load)
45,00 m / 45,00 m x 5,20 m (Bulges 6,50 m) x 4,10 m

Armament:
1 - 3,46" / 88,0 mm guns in single mounts, 20,79lbs / 9,43kg shells, 1928 Model
Breech loading gun in deck mount
on centreline forward
1 - 0,79" / 20,0 mm guns in single mounts, 0,24lbs / 0,11kg shells, 1928 Model
Anti-aircraft gun in deck mount
on centreline aft, 1 raised gun
Weight of broadside 21 lbs / 10 kg
Shells per gun, main battery: 180
7 - 21,0" / 533,4 mm submerged torpedo tubes. Six forward, one aft.

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0,79" / 20 mm - -
2nd: 0,79" / 20 mm - -

Machinery:
Diesel Internal combustion generators plus batteries,
Electric motors, 2 shafts, 2.081 shp / 1.553 Kw = 17,00 kts
Range 4.000nm at 12,00 kts
Bunker at max displacement = 114 tons

Complement:
57 - 75

Cost:
£0,108 million / $0,432 million

Distribution of weights at normal displacement:
Armament: 3 tons, 0,5 %
Armour: 2 tons, 0,3 %
- Belts: 0 tons, 0,0 %
- Torpedo bulkhead: 0 tons, 0,0 %
- Armament: 2 tons, 0,3 %
- Armour Deck: 0 tons, 0,0 %
- Conning Tower: 0 tons, 0,0 %
Machinery: 65 tons, 11,5 %
Hull, fittings & equipment: 302 tons, 53,7 %
Fuel, ammunition & stores: 77 tons, 13,6 %
Miscellaneous weights: 115 tons, 20,4 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
3 lbs / 1 Kg = 0,1 x 3,5 " / 88 mm shells or 0,0 torpedoes
Stability (Unstable if below 1.00): 1,04
Metacentric height 0,4 ft / 0,1 m
Roll period: 14,5 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: 0,465
Length to Beam Ratio: 6,92 : 1
'Natural speed' for length: 12,15 kts
Power going to wave formation at top speed: 62 %
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): 969,8 %
- Above water (accommodation/working, high = better): 0,0 %
Waterplane Area: 1.627 Square feet or 151 Square metres
Displacement factor (Displacement / loading): 211 %
Structure weight / hull surface area: 105 lbs/sq ft or 511 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 3,51
- Longitudinal: 3,58
- Overall: 3,51
Hull space for machinery, storage, compartmentation is extremely poor
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: 105,3m
emergency diving depth: 168.4m
Crush depth: 263,25m

Quoted

Space - Hull below water (magazines/engines, low = better): 969,8 %

Umm...I think that's a bit too crowded.

The coastal boat's also rather large to be passed off as a 450 t second-class boat.

First design's a good one.

IMHO SS2 doesn't seem to work well at the submarine thing. It's why I've kept my sub designs in SpringStyle...