WesWorld

Any suggestions? I have no idea how to even start this, but I haven't used SpringStyle at all and would prefer to use SpringSharp if it's possible....

It should work the same for SStyle and SSharp...

Quoted

Submarines: Spring Style is designed for surface
ships, and isn't really suited to sub sims. (Rolf
Hoffman has created an excellent pencil-and-paper sub
sim rule, which will be added to my website once
formatted.) However, a fairly decent approximate sub
sim can be done using Spring Style:

You will sim your sub in awash condition, just
about to go under. Specify depth as about 2/3 of
beam; this seems typical for subs of pre-nuke era.
Provide "miscelleneous weight" of about 1/4 to 1/6
of normal displacement - this is your ballast tank.
(Some nations' real subs had closer to 1/3, but
this will not sim well.)

For freeboard, enter zero. (To avoid computer
error, the program will adjust this to 0.1 ft
(0.03 metre). You'll get a "horribly cramped"
warning - ignore it. However, if your sub has
stability less than 1.0, you'll have to redesign
it. Always enter steadiness of 50 pct. (If you cheat
to get more stability, whoever re-runs the sim will
catch you!)

Multiply composite hull strength times 100 to
get operational diving depth in feet. (Multiply by
30 for depth in metres.) Emergency diving depth
is 1.6 times operational depth; crush depth is 2.5
times operational depth.

You will find that the smaller the ballast
tank, the deeper your sub can dive. However, the
ballast tank is your reserve bouyancy, and will
determine how much depth-charging you can take
and still make it back up!

Adjust your report file. Just delete all those
warnings about lack of seaworthiness - a dived sub
obviously isn't seaworthy by surface-ship standards.
Specify crew as about half the listed minimum.
Don't forget to list operational diving depth.

Example...

I-8, Japan Patrol Submarine laid down 1930

Displacement:
1,391 t light; 1,428 t standard; 1,611 t normal; 1,758 t full load

Dimensions: Length overall / water x beam x draught
235.00 ft / 235.00 ft x 30.00 ft x 20.00 ft (normal load)
71.63 m / 71.63 m x 9.14 m x 6.10 m

Armament:
1 - 4.13" / 105 mm guns in single mounts, 34.00lbs / 15.42kg shells, 1930 Model
Breech loading gun in deck mount
on centreline forward
2 - 0.98" / 25.0 mm guns (1x2 guns), 0.57lbs / 0.26kg shells, 1926 Model
Anti-aircraft guns in deck mount
on side amidships
2 - 0.52" / 13.2 mm guns (1x2 guns), 0.09lbs / 0.04kg shells, 1930 Model
Machine guns in deck mount
on side
Weight of broadside 35 lbs / 16 kg
Shells per gun, main battery: 200
7 - 21.0" / 533.4 mm submerged torpedo tubes

Machinery:
Diesel Internal combustion engines plus batteries,
Electric cruising motors plus geared drives, 1 shaft, 6,084 shp / 4,539 Kw = 20.00 kts
Range 6,750nm at 12.00 kts
Bunker at max displacement = 331 tons

Complement:
63-83 (126 - 165)

Cost:
£0.328 million / $1.310 million

Distribution of weights at normal displacement:
Armament: 5 tons, 0.3 %
Machinery: 184 tons, 11.4 %
Hull, fittings & equipment: 879 tons, 54.6 %
Fuel, ammunition & stores: 220 tons, 13.7 %
Miscellaneous weights: 323 tons, 20.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
717 lbs / 325 Kg = 20.3 x 4.1 " / 105 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.02
Metacentric height 0.9 ft / 0.3 m
Roll period: 13.6 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: 0.400
Length to Beam Ratio: 7.83 : 1
'Natural speed' for length: 15.33 kts
Power going to wave formation at top speed: 54 %
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): 106.6 %
- Above water (accommodation/working, high = better): 0.0 %
Waterplane Area: 4,103 Square feet or 381 Square metres
Displacement factor (Displacement / loading): 221 %
Structure weight / hull surface area: 132 lbs/sq ft or 645 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 3.08
- Longitudinal: 3.36
- Overall: 3.11
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is extremely poor

Diving depth: 311 feet
Emrgency Depth: 466.5 feet
Crush Depth: 777.5 feet


Note that with the next sim of the same submarine, I played around a bit with the design. At the current dimensions of the end belts, I can enter a certain (whole) number for the thickness and that number represents the number of torpedoes aboard. I did something similar on carriers where the number I entered for the ends belt represents the number of spare planes aboard the ship.


I-8, Japan Patrol Submarine laid down 1930

Displacement:
1,391 t light; 1,428 t standard; 1,611 t normal; 1,758 t full load

Dimensions: Length overall / water x beam x draught
235.00 ft / 235.00 ft x 30.00 ft x 20.00 ft (normal load)
71.63 m / 71.63 m x 9.14 m x 6.10 m

Armament:
1 - 4.13" / 105 mm guns in single mounts, 34.00lbs / 15.42kg shells, 1930 Model
Breech loading gun in deck mount
on centreline forward
2 - 0.98" / 25.0 mm guns (1x2 guns), 0.57lbs / 0.26kg shells, 1926 Model
Anti-aircraft guns in deck mount
on side amidships
2 - 0.52" / 13.2 mm guns (1x2 guns), 0.09lbs / 0.04kg shells, 1930 Model
Machine guns in deck mount
on side
Weight of broadside 35 lbs / 16 kg
Shells per gun, main battery: 200
7 - 21.0" / 533.4 mm submerged torpedo tubes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Ends: 34.0" / 864 mm 22.15 ft / 6.75 m 2.00 ft / 0.61 m
212.85 ft / 64.88 m Unarmoured ends

Machinery:
Diesel Internal combustion engines plus batteries,
Electric cruising motors plus geared drives, 1 shaft, 6,084 shp / 4,539 Kw = 20.00 kts
Range 6,750nm at 12.00 kts
Bunker at max displacement = 331 tons

Complement:
63-83 (126 - 165)

Cost:
£0.328 million / $1.310 million

Distribution of weights at normal displacement:
Armament: 5 tons, 0.3 %
Armour: 56 tons, 3.5 %
- Belts: 56 tons, 3.5 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 0 tons, 0.0 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 184 tons, 11.4 %
Hull, fittings & equipment: 824 tons, 51.1 %
Fuel, ammunition & stores: 220 tons, 13.7 %
Miscellaneous weights: 323 tons, 20.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
708 lbs / 321 Kg = 20.0 x 4.1 " / 105 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.00
Metacentric height 0.8 ft / 0.3 m
Roll period: 13.9 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: 0.400
Length to Beam Ratio: 7.83 : 1
'Natural speed' for length: 15.33 kts
Power going to wave formation at top speed: 54 %
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): 106.6 %
- Above water (accommodation/working, high = better): 0.0 %
Waterplane Area: 4,103 Square feet or 381 Square metres
Displacement factor (Displacement / loading): 206 %
Structure weight / hull surface area: 124 lbs/sq ft or 604 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 2.89
- Longitudinal: 2.85
- Overall: 2.86
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is extremely poor

Six tubes forward with 5 reloads, 1 tube aft with 4 reloads. Total 34 53.3 cm (21") Type 89 torpedoes.
Diving depth: 286 feet
Emrgency Depth: 429 feet
Crush Depth: 715 feet

Thanks!

No problem. Hope to see some U-boats appear to threaten the world.

Quoted

Note that with the next sim of the same submarine, I played around a bit with the design. At the current dimensions of the end belts, I can enter a certain (whole) number for the thickness and that number represents the number of torpedoes aboard. I did something similar on carriers where the number I entered for the ends belt represents the number of spare planes aboard the ship.

Where on earth did you get this method?

Maybe you should remove the "on Earth" from that and ask again.
^_^

Quoted

Where on earth did you get this method?

I didn't get it from Earth. I got it from Vulcan. ^_^
I got it from the chaos inside my mind (where the other weird stuff comes from). Remember that when you add torpedo tubes, SS does not drop the hull strength, only deck or hull space (which is what RA mentioned here not long ago). At that point I assume that the ship does have torpedo tubes, but no torpedoes. This is something I have realized some time ago and I usually consider the torpedoes part of the miscellaneous weight together with the depth charges. Now one problem with subs is that when using miscellaneous weight, stability drops rather quickly.
Having played around with SS in the past, miscellaneous weight is located above the upper belt armor. Even when using end belts, stability drops to 1. Also at that time, I simmed a submarine using main belt armor and torpedo bulkhead, rather than miscellaneous weight to sim the ballast water and the end belts to sim not only the torpedoes, but the additional weight needed for the diesels as well.
The Spring Style notes make no mention on how to sim the torpedoes aboard the sub, so I'm free to use whatever I think is useful and since the end belts should be located at the ends of the ship, I think it works quite well.
For spare aircrafts, use end belts that are about 26.1x26.1 feet (I think it was that). Now every inch of armor you add, you'll add a little bit more than 25 tons (25.0-something tons) to the design . Rather than having to recalculate everything when you want less or more spare planes, you just have to alter the belt thickness.
Torpedo calibration:
-The Japanese 53.3 cm (21") Type 89 torpedo has a weight of 3,671 lbs.
- Divide this by 2240 lbs (if you use metric, divide weight in kg by 1016.1 kg). You now know how much 1 torpedo weights in tons. The Japanese torpedo is 1.63884 tons
- Enter 100000 for thickness and then alter belt sizes until you get to the proper weight for the end belts. For the Type 89, it is 163,884 tons.
- Look at how many torpedoes you believe are necessary for your ship and then fill in that number in the end belt thickness.

Interesting, I'll have to tinker with a few sub designs. Whats your standard rule of thumb reguarding end belts and torpedos?

We should really set a standard rule in reguards to Subs, realistically we wouldn't want everyone designing subs with different methods all claiming theirs is the right one. That might get complicated.

I hate to be a stickler but it would make things more fair in reguards to those who just use the standard SS rules.

Having standard rules would be a good thing IMO, simplifies matters for everyone.

Here's a first cut at a coastal U-boat. I've taken onboard the Italian desire that U-boats not have reloadable torpedo tubes, though I have not kept to their 10-ton bunker idea.

Type I, German U-boat laid down 1930

Displacement:
432 t light; 442 t standard; 484 t normal; 518 t full load

Dimensions: Length overall / water x beam x draught
164.04 ft / 164.04 ft x 19.69 ft x 13.12 ft (normal load)
50.00 m / 50.00 m x 6.00 m x 4.00 m

Armament:
1 - 3.46" / 88.0 mm guns in single mounts, 20.79lbs / 9.43kg shells, 1930 Model
Quick firing gun in deck mount
on centreline aft
2 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1930 Model
Machine guns in deck mounts
on side ends, evenly spread
Weight of broadside 21 lbs / 10 kg
Shells per gun, main battery: 100
8 - 21.0" / 533 mm submerged torpedo tubes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Ends: 3.74" / 95 mm 26.25 ft / 8.00 m 3.28 ft / 1.00 m
137.80 ft / 42.00 m Unarmoured ends

- Conning tower: 0.79" / 20 mm

Machinery:
Diesel Internal combustion generators plus batteries,
Electric motors, 2 shafts, 1,060 shp / 791 Kw = 15.00 kts
Range 3,000nm at 12.00 kts
Bunker at max displacement = 75 tons

Complement:
51 - 67

Cost:
£0.091 million / $0.365 million

Distribution of weights at normal displacement:
Armament: 3 tons, 0.5 %
Armour: 13 tons, 2.7 %
- Belts: 12 tons, 2.5 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 0 tons, 0.0 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 1 tons, 0.2 %
Machinery: 32 tons, 6.6 %
Hull, fittings & equipment: 284 tons, 58.6 %
Fuel, ammunition & stores: 53 tons, 10.9 %
Miscellaneous weights: 100 tons, 20.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
-20 lbs / -9 Kg = -0.9 x 3.5 " / 88 mm shells or NaN torpedoes
Stability (Unstable if below 1.00): 1.02
Metacentric height 0.5 ft / 0.1 m
Roll period: 12.3 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: 0.400
Length to Beam Ratio: 8.33 : 1
'Natural speed' for length: 12.81 kts
Power going to wave formation at top speed: 46 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 15.00 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): -1,239.9 %
- Above water (accommodation/working, high = better): 0.0 %
Waterplane Area: 1,988 Square feet or 185 Square metres
Displacement factor (Displacement / loading): 244 %
Structure weight / hull surface area: 92 lbs/sq ft or 447 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 3.27
- Longitudinal: 2.97
- Overall: 3.04
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

Carries 8 torpedoes in the externally-loaded tubes, no reloads.

Quoted

Whats your standard rule of thumb reguarding end belts and torpedos?

Like I mentioned before:
- Your torpedo has a weight of x lbs. or kgs.
- Divide this by 2240 lbs (if you use metric, divide weight in kg by 1016.1 kg). You now know how much 1 torpedo weights in tons.
- Enter 100,000 for thickness and then alter belt sizes until you get to the proper weight for the torpedo * 100,000.
- Once that is done, look at how many torpedoes you believe are necessary for your ship and then fill in that number in the end belt thickness.

Remember that the weight of an x inch torpedo of nation A does not have to be the same as the weight of an x inch torpedo of nation B.

Quoted

Here's a first cut at a coastal U-boat.

Best is to start testing with the regular rules, without the use of the end belts.

I've been satisfied using misc. weight to sim reloads. I haven't allocated tonnage for the rounds in the tubes.

Here's a version of the Type I without the end-belts.

Type I, Germany U-boat laid down 1930

Displacement:
431 t light; 442 t standard; 484 t normal; 518 t full load

Dimensions: Length overall / water x beam x draught
164.04 ft / 164.04 ft x 19.69 ft x 13.12 ft (normal load)
50.00 m / 50.00 m x 6.00 m x 4.00 m

Armament:
1 - 3.46" / 88.0 mm guns in single mounts, 20.79lbs / 9.43kg shells, 1930 Model
Quick firing gun in deck mount
on centreline aft
2 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1930 Model
Machine guns in deck mounts
on centreline ends, evenly spread
Weight of broadside 21 lbs / 10 kg
Shells per gun, main battery: 150
8 - 21.0" / 533.4 mm submerged torpedo tubes

Armour:

- Conning tower: 0.79" / 20 mm

Machinery:
Diesel Internal combustion generators plus batteries,
Electric motors, 2 shafts, 1,060 shp / 791 Kw = 15.00 kts
Range 3,000nm at 12.00 kts
Bunker at max displacement = 75 tons

Complement:
51 - 67

Cost:
£0.091 million / $0.365 million

Distribution of weights at normal displacement:
Armament: 3 tons, 0.5 %
Armour: 1 tons, 0.2 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 0 tons, 0.0 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 1 tons, 0.2 %
Machinery: 32 tons, 6.6 %
Hull, fittings & equipment: 283 tons, 58.4 %
Fuel, ammunition & stores: 53 tons, 11.0 %
Miscellaneous weights: 112 tons, 23.1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
-18 lbs / -8 Kg = -0.9 x 3.5 " / 88 mm shells or NaN torpedoes
Stability (Unstable if below 1.00): 0.99
Metacentric height 0.4 ft / 0.1 m
Roll period: 12.7 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: 0.400
Length to Beam Ratio: 8.33 : 1
'Natural speed' for length: 12.81 kts
Power going to wave formation at top speed: 46 %
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): -1,284.4 %
- Above water (accommodation/working, high = better): 0.0 %
Waterplane Area: 1,988 Square feet or 185 Square metres
Displacement factor (Displacement / loading): 244 %
Structure weight / hull surface area: 91 lbs/sq ft or 446 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 3.26
- Longitudinal: 3.18
- Overall: 3.20
Caution: Poor stability - excessive risk of capsizing
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

12 tons of the miscellaneous tonnage are for torpedoes in the external, non-reloadable tubes.

Quoted

Survivability (Non-critical penetrating hits needed to sink ship):
-18 lbs / -8 Kg = -0.9 x 3.5 " / 88 mm shells or NaN torpedoes
Stability (Unstable if below 1.00): 0.99

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): -1,284.4 %

I don't think these things are good points.

Possibly not, I wasn't sure whether they were important though given the previous suggestion to ignore most of the warnings. Here's a revised version....

Type I, Germany U-boat laid down 1930

Displacement:
431 t light; 441 t standard; 458 t normal; 471 t full load

Dimensions: Length overall / water x beam x draught
164.04 ft / 164.04 ft x 19.69 ft x 11.81 ft (normal load)
50.00 m / 50.00 m x 6.00 m x 3.60 m

Armament:
1 - 3.46" / 88.0 mm guns in single mounts, 20.79lbs / 9.43kg shells, 1930 Model
Anti-aircraft gun in deck mount
on centreline aft
2 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1930 Model
Machine guns in deck mounts
on centreline, all amidships
Weight of broadside 21 lbs / 10 kg
Shells per gun, main battery: 120
4 - 21.0" / 533.4 mm submerged torpedo tubes

Machinery:
Diesel Internal combustion generators plus batteries,
Electric motors, 2 shafts, 1,019 shp / 760 Kw = 15.00 kts
Range 3,000nm at 8.00 kts
Bunker at max displacement = 30 tons

Complement:
49 - 64

Cost:
£0.090 million / $0.362 million

Distribution of weights at normal displacement:
Armament: 3 tons, 0.6 %
Machinery: 31 tons, 6.7 %
Hull, fittings & equipment: 285 tons, 62.3 %
Fuel, ammunition & stores: 27 tons, 5.9 %
Miscellaneous weights: 112 tons, 24.5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
182 lbs / 83 Kg = 8.8 x 3.5 " / 88 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.02
Metacentric height 0.5 ft / 0.1 m
Roll period: 12.3 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: 0.420
Length to Beam Ratio: 8.33 : 1
'Natural speed' for length: 12.81 kts
Power going to wave formation at top speed: 47 %
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): 112.5 %
- Above water (accommodation/working, high = better): 0.0 %
Waterplane Area: 2,013 Square feet or 187 Square metres
Displacement factor (Displacement / loading): 235 %
Structure weight / hull surface area: 96 lbs/sq ft or 468 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 3.61
- Longitudinal: 2.73
- Overall: 2.93
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

12 tons of the miscellaneous tonnage are for torpedoes (total of 8, 4 reloads).

Quoted

Originally posted by Red Admiral

Quoted

Survivability (Non-critical penetrating hits needed to sink ship):
-18 lbs / -8 Kg = -0.9 x 3.5 " / 88 mm shells or NaN torpedoes
Stability (Unstable if below 1.00): 0.99

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): -1,284.4 %

I don't think these things are good points.

Well the main problem with that design is that he uses eight external tubes, yet when you enter them as 'below waterline tubes', SS will consider them to be internal thus he ends up with those negative values. Using the eight as 'above waterline tubes' might probably work out...

It does work out, fairly nicely in fact.

Type I, Germany U-boat laid down 1930

Displacement:
431 t light; 441 t standard; 458 t normal; 471 t full load

Dimensions: Length overall / water x beam x draught
164.04 ft / 164.04 ft x 19.69 ft x 11.81 ft (normal load)
50.00 m / 50.00 m x 6.00 m x 3.60 m

Armament:
1 - 3.46" / 88.0 mm guns in single mounts, 20.79lbs / 9.43kg shells, 1930 Model
Anti-aircraft gun in deck mount
on centreline aft
2 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1930 Model
Machine guns in deck mounts
on centreline, all amidships
Weight of broadside 21 lbs / 10 kg
Shells per gun, main battery: 120
8 - 21.0" / 533.4 mm above water torpedoes

Machinery:
Diesel Internal combustion generators plus batteries,
Electric motors, 2 shafts, 1,019 shp / 760 Kw = 15.00 kts
Range 3,000nm at 8.00 kts
Bunker at max displacement = 30 tons

Complement:
49 - 64

Cost:
£0.090 million / $0.362 million

Distribution of weights at normal displacement:
Armament: 3 tons, 0.6 %
Machinery: 31 tons, 6.7 %
Hull, fittings & equipment: 285 tons, 62.3 %
Fuel, ammunition & stores: 27 tons, 5.9 %
Miscellaneous weights: 112 tons, 24.5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
428 lbs / 194 Kg = 20.6 x 3.5 " / 88 mm shells or 0.7 torpedoes
Stability (Unstable if below 1.00): 1.02
Metacentric height 0.5 ft / 0.1 m
Roll period: 12.3 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: 0.420
Length to Beam Ratio: 8.33 : 1
'Natural speed' for length: 12.81 kts
Power going to wave formation at top speed: 47 %
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): 54.0 %
- Above water (accommodation/working, high = better): 0.0 %
Waterplane Area: 2,013 Square feet or 187 Square metres
Displacement factor (Displacement / loading): 235 %
Structure weight / hull surface area: 96 lbs/sq ft or 468 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 3.61
- Longitudinal: 2.74
- Overall: 2.93
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

12 tons of the miscellaneous tonnage are for torpedoes in the external, non-reloadable tubes

Except for the external, trainable mounts as on some of the historical Dutch and French subs, submarines' torpedo tubes should be simmed as below-water.

Stability should be no less than 1.00...and trim should not deviate from 50 (per the SStyle rules).

As mentioned elsewhere I assume that the tubes (on surface ships) and the first salvo of torpedoes can be considered to be part of the "hull, fittings and equipment" tonnage (whether that changes when the fush are added or not). Reloads are accounted for using misc. weight.

(That does get a bit touchy, tho, with subs - how much of the misc weight is reloads, and how much is the ballast tanks?)

Quoted

Except for the external, trainable mounts as on some of the historical Dutch and French subs, submarines' torpedo tubes should be simmed as below-water.

Even when they're not reloadable on board, as with the post-war German Type-205s and Type-206s? They would certainly need to be noted as fixed vs trainable, sure, but with the external tubes there's no need for the torpedo room to have enough room and provisions for reloading the fish.

Quoted

As mentioned elsewhere I assume that the tubes (on surface ships) and the first salvo of torpedoes can be considered to be part of the "hull, fittings and equipment" tonnage (whether that changes when the fush are added or not). Reloads are accounted for using misc. weight.

That would have to be made clear in the notes somehow. "XX tons for reload torpedoes, YY carried", etc.