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161

Wednesday, November 26th 2014, 5:22am

- the Midget submarines, even with a refit, would remain the same so I did not bother doing anything about its sim.
- PBR vessels only have stats and no SS sim.
- PT boats, like the PBRs, only have stats and no SS sim.

That leaves the Umi Deep Sea Research Vessel for which I used a different way to sim a sub in order to make it work with SS, using the Trieste as base.

The armor represents the strengthened pressure hull where the main belt is for the float filled with gasoline and ballast water and the torpedo bulkhead is for the crew sphere.
The bunker represents the 85867 litres of gasoline (60t) and 14,225 litres of ballast water (13t) and 1 ton fuel (probably less, but I was too lazy how many kgs I would need to keep the vessel going for some 24-48 hours). Wiki indicates that Trieste had 85000 litres and I used the density of 0.71 kg/l to calculate the weight. Wiki did not say anything about the ballast water tanks, but I used the linedrawing to make the estimate.
Now I am not sure about its accuracy, but the German wiki pages on the FNRS-2 and FNRS-3 indicate that these two older Bathyscaphes had a theoretical maximum of 16,000 meters (52,493 feet), so I used that value as target for the calculations of the crush depth (which is the main reason the wall thickness of the sphere ended up being 10 inches while on the Trieste it was 5" (according to wiki)).
WIki indicates that Trieste was ~50 tons but I can't really do too much about the displacement considering that I am already at the minimum allowed BC while using roughly the same dimensions as the Trieste.

Umi, Japan Deep-submergence vehicle laid down 1945

Displacement:
110 t light; 113 t standard; 155 t normal; 188 t full load

Dimensions: Length overall / water x beam x draught
60.00 ft / 60.00 ft x 12.50 ft x 19.00 ft (normal load)
18.29 m / 18.29 m x 3.81 m x 5.79 m

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1.35" / 34 mm 45.00 ft / 13.72 m 19.63 ft / 5.98 m
Ends: Unarmoured
Main Belt covers 115% of normal length

- Torpedo Bulkhead:
10.0" / 254 mm 7.00 ft / 2.13 m 11.00 ft / 3.35 m

Machinery:
Petrol Internal combustion generators plus batteries,
Electric motors, 1 shaft, 0 shp / 0 Kw = 1.00 kts
Range 1,125,000nm at 1.00 kts
Bunker at max displacement = 74 tons

Complement:
21 - 28 2

Cost:
£0.027 million / $0.107 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0%
Armour: 78 tons, 50.6%
- Belts: 50 tons, 32.2%
- Torpedo bulkhead: 28 tons, 18.4%
- Armament: 0 tons, 0.0%
- Armour Deck: 0 tons, 0.0%
- Conning Tower: 0 tons, 0.0%
Machinery: 0 tons, 0.0%
Hull, fittings & equipment: 32 tons, 20.7%
Fuel, ammunition & stores: 44 tons, 28.7%
Miscellaneous weights: 0 tons, 0.0%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
3,644 lbs / 1,653 Kg = 33.7 x 6 " / 152 mm shells or 29.6 torpedoes
Stability (Unstable if below 1.00): 1.01
Metacentric height 0.2 ft / 0.1 m
Roll period: 11.1 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: 0.380
Length to Beam Ratio: 4.80 : 1
'Natural speed' for length: 7.75 kts
Power going to wave formation at top speed: 1 %
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): -3.6%
- Above water (accommodation/working, high = better): 0.0%
Waterplane Area: 432 Square feet or 40 Square metres
Displacement factor (Displacement / loading): 197%
Structure weight / hull surface area: 27 lbs/sq ft or 132 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.05
- Longitudinal: 17.64
- Overall: 1.39
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


Diving Depth: 6,161 ft
Emergency Depth: 18,027 ft
Crush Depth: 52,101 ft

Depth calculations:
For my previous subs with its strengthened pressure hull, I calculated that with 1.2" the modifiers would be 1.17x, 2x and 3.4x for the three depths, to be multiplied with the hull strength of the armorless sim. The hull thickness here is a lot more than with those subs. The float is 1.125x the thickness and the sphere 8.33x so I multiplied that with the modifiers (to get 1.316x, 2.25x and 3.825x and 9.74x, 16.66x, 28.32x respectively) and finally multiplied the values of each depth with each other to get a final Bathyscaphe modifier of 12.81x, 37.48x and 108.32x. Multiply that with the armorless sim hull strength of 4.81 and 100 to get the values above.

Is it correct? Well, considering that the Trieste's sphere wall was 5" and this one's is 10" probably not. But considering that this thing will be more for storyline stuff than any action, it is probably not that important. At least it kinda works. :)

162

Wednesday, November 26th 2014, 2:24pm

That leaves the Umi Deep Sea Research Vessel for which I used a different way to sim a sub in order to make it work with SS, using the Trieste as base.

Auguste Piccard (backed by his employer, the CNRS) will launch legal action to protect his patented intellectual property.

163

Wednesday, November 26th 2014, 3:16pm

That leaves the Umi Deep Sea Research Vessel for which I used a different way to sim a sub in order to make it work with SS, using the Trieste as base.

Auguste Piccard (backed by his employer, the CNRS) will launch legal action to protect his patented intellectual property.


Hmm. Point well taken... :thumbsup:

164

Wednesday, November 26th 2014, 3:32pm

Fear not. Japan's Unbiassed Legal System will take care of that. :)

Japan Patent Office: "We have received neither word nor writing from foreign patent offices of any patent of sorts having been filed regarding some sort or form of Deep Submergence Research Vehicle like the Umi or any patent of sorts having been filed regarding a so-called Springstyle or Springsharp sim file of said vehicle by Mr. A. Piccard, the Centre National de la Recherche Scientifique or Mr. B. Paine..."

Japanese Judge: "Not Guilty." *BANG* "Next Case."
:D

165

Wednesday, November 26th 2014, 3:37pm

Fear not. Japan's Unbiassed Legal System will take care of that. :)

Japan Patent Office: "We have received neither word nor writing from foreign patent offices of any patent of sorts having been filed regarding some sort or form of Deep Submergence Research Vehicle like the Umi or any patent of sorts having been filed regarding a so-called Springstyle or Springsharp sim file of said vehicle by Mr. A. Piccard, the Centre National de la Recherche Scientifique or Mr. B. Paine..."

Japanese Judge: "Not Guilty." *BANG* "Next Case."
:D


Whether Brock's statement, or your reply, is in-or-out of character would have interesting application to the Law of Unintended Consequences.

166

Wednesday, November 26th 2014, 3:55pm

Law of Unintended Consequences... meaning that the Wesworld version of Brock might accidentally get killed at one point in time if my bit is considered IC? That's no good so I guess my bit will have to be OOC. :)

167

Tuesday, February 24th 2015, 5:49pm

Something like this... haven't really figured out what the final 29 tons of miscellaneous weights would be for... Need to alter the report as well since it is slightly lighter than before.

I-310 Japanese Submarine
Date: 1946
Type: Oceanic
Length: 95.00m
Beam: 9.20m
Draft: 9.80m
Crush depth: 317.5m
Light Displacement 3189t
Loaded Displacement 3837t
Full Displacement 4283t
wt fuel&batts: 1275t
Reserve buoyancy: 10%
Armament:
- 8 x 533mm (bow)
- 2x1 25mm MGs (1 from sim, 1 from misc weights)
- 48 tons for mines or reload torpedoes
ElecHP: 15500hp
DieselHP: 7000hp
Speed:
- Max Surf Speed: 15.6 knots
- Max Sub Speed: 20.2 knots
Range:
- Surfaced: 18,342nm@10 knots
- Submerged: 415nm@5 knots
Tons Oil: 675.0t
Tons Battery: 600.0t
Miscellaneous Weight: 300 tons
Crew: 110

- 32 Type 3 torpedoes (= 8 in the tubes + 24 from the 48 tons for 'mines or reload torpedoes'), though usually 28 carried with 4 idle positions to permit withdrawal of torpedoes from tubes for servicing.
- Diesel-electric drive.
- Main electric engines output: 15,000 shp.
- Silent running engines output: 500 shp.
- Surface speed: (diesel-electric) 16 knots, (battery-electric) 20.8 knots.
- Submerged speed: (silent running engines) 6.4 knots, (battery-electric) 20.0 knots, (diesel-electric + Ninjatousaya) 10.1 knots.
- Range Surfaced (diesel-Electric): 22,645nm@9 knots, 18,342nm@10 knots, 12,738nm@12 knots, 8,152nm@15 knots.
- Range Submerged (batteries, silent running engines): 1,192nm@3 knots, 415nm@5 knots, 279nm@6 knots.
- Range Submerged (batteries, main engines): 143nm@8 knots, 80nm@10 knots, 22nm@15 knots.
- Range Submerged (diesel-electric + Ninjatousaya): 22,200nm@6 knots, 12,100nm@9 knots
- Endurance: (surfaced) 76 days and 10hours @ 10 knots, (submerged, batteries) 3 days and 11 hours @ 5 knots
- Diving depth: 417 feet
- Emergency Depth: 667 feet
- Crush Depth: 1042 feet
- 300 tons Miscellaneous weights breakdown:
--- 30 tons for electric torpedo reloading system
--- 5 torpedo service material
--- 1 ton for extra single 25mm machinegun
--- 10 tons for Ninjatousaya System
--- 60 tons for sonar, hydrophones and radar
--- 10 tons for defense countermeasures and 'camouflage'
--- 32 tons for air condition system
--- 4 tons for 80 oxygen bottles (50 l, 150 atm).
--- 5 tons CO2 removal system + Soda lime
--- 32 tons for damage control and fire suppression systems
--- 8 tons for safety and rescue equipment
--- 15 tons for yatai mobile food stall (well, mobile since the sub moves around)
--- 20 tons for pachinko parlor
--- 15 tons for karaoke facilities + Kobe Cola vending machines
--- 20 tons for officer's lounge
--- 4 tons for deep freeze unit
--- 29 tons for various



Notes:
- Speed. I used SS to determine how much power was needed for 20 knots and then raised the sub a bit so it was in a 'surfaced' state and figured out the speed with the same amount of power. The submerged diesel-electric + Ninjatousaya range is based on that of the Type XXI. The speed would be limited by the Ninjatousaya rather than the engine output.
- Range. Submerged range with Diesels is a bit of a guess. The German wiki page on the Type XXI gave similar ranges for submerged speeds roughly 2/3 of the surface speed so I stuck to that.
- Loading system. Can't find something definitive as to what was used on the Type XXI. English wiki says hydraulic (although it also says "citation needed") and German wiki indicates that it is electric (but there aren't any references there either). Looking at other sites it varies as well. In the end decided to stick to electric based on the German wiki and the XXI design study on uboatarchive.net.

168

Wednesday, February 25th 2015, 9:39am

Looks a comprehensive series of stats, I'm no expert with SubSim so I'll leave it to others to critique the design more thoroughly. Looks an impressive beast though.

169

Wednesday, February 25th 2015, 3:11pm

Quoted

Looks a comprehensive series of stats, I'm no expert with SubSim so I'll leave it to others to critique the design more thoroughly.

Me neither, although most of the stats below the main SubSim data is based on the SubSim I made of it. Not sure about the misc weights for most stuff. I did look around for 50l oxygen bottles and got a site where it said ~50 kg. It could be that that is for an empty one, but it was one that could handle more pressure than the ones I have so for simplicity I stuck to that and would give you roughly 20 bottles per ton. The rest is pretty much me entering something that seems reasonable.

Quoted

Looks an impressive beast though.

Definitely more impressive than the one for Argentina. :D

170

Wednesday, February 25th 2015, 3:17pm

Years ago I had to do QA on the overhaul of submarine air flasks. They are huge - about the size of a torpedo, weighing hundreds of pounds. I imagine that oxygen flasks for submarines would be of the same order. You might find some useful information here, though I suspect that it is more detail than really necessary.

171

Wednesday, February 25th 2015, 3:39pm

I just went with the weight given here for the 200 atm 50 liter bottle...
http://www.hydra.co.za/products/diving-s…-gas-banks.html
... granted the weight is also dependent on what material is being used for the cylinder, but I kept it simple.

172

Wednesday, February 25th 2015, 4:00pm

Think I might have misread it a bit what you said. To be a bit more clear, the German wiki on the Type XXI indicates that it had 30 50 liter, 150 atmosphere oxygen bottles to prevent the oxygen level from dropping below 17%. As indicated on the site I linked above, their 50l 200 atm bottle is roughly 50 kg (most likely empty). Those 50 liter bottles are nowhere near the size of a torpedo. I think that the air flasks you're probably thinking of are those who also blow air into the ballast tanks in order to get the submarine to the surface. Those would indeed need to be big but those 50l oxygen bottles that I simmed as part of the miscellaneous weights are for something quite specific and would be something separate from the big air tanks in the submarine.

173

Wednesday, February 25th 2015, 4:20pm

Think I might have misread it a bit what you said. To be a bit more clear, the German wiki on the Type XXI indicates that it had 30 50 liter, 150 atmosphere oxygen bottles to prevent the oxygen level from dropping below 17%. As indicated on the site I linked above, their 50l 200 atm bottle is roughly 50 kg (most likely empty). Those 50 liter bottles are nowhere near the size of a torpedo. I think that the air flasks you're probably thinking of are those who also blow air into the ballast tanks in order to get the submarine to the surface. Those would indeed need to be big but those 50l oxygen bottles that I simmed as part of the miscellaneous weights are for something quite specific and would be something separate from the big air tanks in the submarine.


Quite so. Those air flasks were for blowing the ballast tanks. I have no idea the size of the oxygen tanks, so they could be as large or as small as your source, which seems quite plausible. It is, in all truth, a very minor point in the grand scheme of things.

174

Wednesday, February 25th 2015, 4:53pm

Well, you don't want them to be too big. It would be necessary that a few guys would be able to pull them out in order to replace them with full oxygen bottles. It would be a bit problematic if they did not fit through a hatch or impossible to maneuver them through the confines of a submarine.

While I could be wrong about the calculations, 50 liters of oxygen at 150 atmosphere is probably something like 10 kg. The 150 atmosphere bottles could be a bit lighter than the 200 atmosphere ones and while it may not be entirely correct, 50 kg (50.805 to be a bit more precise) is fairly easy to use as you would end up with 20 bottles per ton of miscellaneous weights.

Of course in the grand scheme of things, you are talking about 4 tons of a total of 3,189 tons. That's a mere 0.125% but it is a vital 0.125% if the submarine is remaining under water for a long period of time.

175

Friday, February 27th 2015, 4:26pm

Since the tonnage dropped slightly between posting the report and posting the sim of the I-310 submarine class, I realized that I need a few midget submarines armed with 45cm torpedoes when I was looking at the torpedo list on the navweaps site... so with some tons freed up I decided to add a few midget submarines to the list. Unfortunately I could not get any proper results from SpringSharp or SubSim even when I cheated a bit with the values (like using main belt for ballast instead of miscellaneous weights with SpringSharp and deliberately altering the crew number to get a crew of 5 with SubSim) so in the end I just list the given data from a few sites around...

Ha-100 Midget Submarine (OTL Type D)
Year: 1946
Length: 86 feet
Beam: 9 feet
Draft: 7 feet (keel to 'deck' 9.6 feet)
Displacement (full): 60 tons
Machinery: 500 hp electric motors, 150 hp diesel engine.
Speed: (surface) 8 knots, (submerged) 16 knots
Range: (surface) 1,000nm at 8 knots, (submerged) 125nm at 16 knots
Armament: 2 muzzle-loaded 45cm torpedoes
Crew: 5

176

Thursday, May 14th 2015, 5:14pm

Just a minute cosmetic change, but still thought I should post it here before I correct it in the encyclopedia. I was messing around with the Oshima in SS3 and when I looked at the small freeboard sideview picture, I wasn't too happy with how it looked for a 4x3 18" ship so I changed the midbreak from 43% to 37% and the forecastle break from 31% to 25%.
So it goes from looking like this...

... to looking like this...

Nothing else changes on the design, but when looking at the second pic, moving the breaks by 6% makes it looks a lot more acceptable. :)

Oshima, Japan Battleship laid down 1944

Displacement:
94,000 t light; 101,132 t standard; 108,149 t normal; 113,762 t full load

Dimensions: Length overall / water x beam x draught
1,043.71 ft / 1,020.00 ft x 130.00 ft (Bulges 140.00 ft) x 40.00 ft (normal load)
318.12 m / 310.90 m x 39.62 m (Bulges 42.67 m) x 12.19 m

Armament:
12 - 18.11" / 460 mm guns (4x3 guns), 3,897.77lbs / 1,768.00kg shells, 1944 Model (*)
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
40 - 5.00" / 127 mm guns (20x2 guns), 55.12lbs / 25.00kg shells, 1944 Model
Automatic rapid fire guns in deck mounts with hoists
on side, all amidships, all raised mounts - superfiring
40 - 2.95" / 75.0 mm guns (20x2 guns), 12.00lbs / 5.44kg shells, 1944 Model
Automatic rapid fire guns in deck mounts with hoists
on side, evenly spread, 12 raised mounts
72 - 1.57" / 40.0 mm guns (12x6 guns), 2.00lbs / 0.91kg shells, 1944 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
208 - 0.98" / 25.0 mm guns (52x4 guns), 0.57lbs / 0.26kg shells, 1944 Model (**)
Anti-aircraft guns in deck mounts
on side, evenly spread, 12 raised mounts
Weight of broadside 49,721 lbs / 22,553 kg
Shells per gun, main battery: 177 (***)
336 - 4.7" / 120 mm above water torpedoes (****)

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 17.9" / 454 mm 600.00 ft / 182.88 m 17.00 ft / 5.18 m
Ends: 14.0" / 356 mm 140.00 ft / 42.67 m 8.00 ft / 2.44 m
280.00 ft / 85.34 m Unarmoured ends
Upper: 2.25" / 57 mm 600.00 ft / 182.88 m 23.00 ft / 7.01 m
Main Belt covers 90% of normal length

- Torpedo Bulkhead and Bulges:
3.00" / 76 mm 600.00 ft / 182.88 m 50.00 ft / 15.24 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 26.0" / 660 mm 15.0" / 381 mm 20.0" / 508 mm
2nd: 3.00" / 76 mm 1.00" / 25 mm 2.00" / 51 mm
3rd: 1.00" / 25 mm 1.00" / 25 mm 1.00" / 25 mm
4th: 1.00" / 25 mm 1.00" / 25 mm -
5th: 1.00" / 25 mm 1.00" / 25 mm -

- Armour deck: 9.00" / 229 mm, Conning tower: 20.00" / 508 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 201,732 shp / 150,492 Kw = 29.00 kts
Range 10,000nm at 18.00 kts
Bunker at max displacement = 12,630 tons

Complement:
2,981 - 3,876

Cost:
£54.883 million / $219.533 million

Distribution of weights at normal displacement:
Armament: 4,937 tons, 4.6%
Armour: 41,097 tons, 38.0%
- Belts: 9,917 tons, 9.2%
- Torpedo bulkhead: 3,330 tons, 3.1%
- Armament: 9,016 tons, 8.3%
- Armour Deck: 17,855 tons, 16.5%
- Conning Tower: 978 tons, 0.9%
Machinery: 5,151 tons, 4.8%
Hull, fittings & equipment: 38,814 tons, 35.9%
Fuel, ammunition & stores: 14,149 tons, 13.1%
Miscellaneous weights: 4,000 tons, 3.7%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
171,381 lbs / 77,737 Kg = 57.7 x 18.1 " / 460 mm shells or 34.4 torpedoes
Stability (Unstable if below 1.00): 1.11
Metacentric height 9.1 ft / 2.8 m
Roll period: 19.5 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.68
Seaboat quality (Average = 1.00): 1.22

Hull form characteristics:
Hull has low quarterdeck
and transom stern
Block coefficient: 0.663
Length to Beam Ratio: 7.29 : 1
'Natural speed' for length: 36.75 kts
Power going to wave formation at top speed: 46 %
Trim (Max stability = 0, Max steadiness = 100): 49
Bow angle (Positive = bow angles forward): 35.00 degrees
Stern overhang: 2.00 ft / 0.61 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 31.00 ft / 9.45 m
- Forecastle (25%): 21.20 ft / 6.46 m
- Mid (37%): 26.10 ft / 7.96 m
- Quarterdeck (7%): 19.20 ft / 5.85 m (26.10 ft / 7.96 m before break)
- Stern: 19.20 ft / 5.85 m
- Average freeboard: 25.08 ft / 7.64 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 67.6%
- Above water (accommodation/working, high = better): 160.3%
Waterplane Area: 107,238 Square feet or 9,963 Square metres
Displacement factor (Displacement / loading): 114%
Structure weight / hull surface area: 270 lbs/sq ft or 1,317 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.00
- Longitudinal: 1.00
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Good seaboat, rides out heavy weather easily

(*) Actual main gun shell average weight 1775 kg. 1768kg was used to get a proper value for the magazine weight to be used for the breakdown of shells per gun as given below.

(**) Actual 25mm mounts: 40x4 (= 160 guns). 12x4 25mm mounts simmed for AA Rocket launcher mount.
(****) 12cm Rockets simmed as Torpedoes.

(***) Actual shells per gun
46cm = 120 rounds per gun (3131 tons total)
5" = 500 rounds per gun (735 tons total)
75mm = 1500 rounds per gun (535 tons total)
40mm = 2000 rounds per gun (131 tons total)
25mm = 3000 rounds per gun (306 tons total)

94000
- 80 tons for helicopter landing pad.
- 50 tons for 2 helicopters.
- 400 tons for flagship facilities
- 350 tons for fire control and fire control center
- 200 tons for radar systems
- 940 tons for damage control and fire suppression systems
- 235 tons emergency diesel generators
- 940 tons for air condition system
- 209 tons for degaussing coils
- 75 tons for 12x28 12 cm AA Rocket launchers
- 444 for mount improvements
--- 300 tons for 5" mounts
--- 80 tons for 75mm mounts
--- 24 tons for 40mm mounts
--- 40tons for 25mm mounts
- 77 tons for crew comfort.
Total: 4000 tons

177

Thursday, June 18th 2015, 12:53am

Basically a much bigger Myoko armed with 10" guns instead of 8". I had it ready for posting, but when I was working on the Fuso sim, I realized that I should take a closer look at what I actually needed for the number of shells (and not just some random number) as well as the breakdown of the miscellaneous weights. When I did, I noticed that I needed 100 more shells and 400 tons more miscellaneous weights so she ended up half a knot slower than the original (that's what you get when you use fixed formulas for certain things).

Komaki, Japan Large Cruiser laid down 1946

Displacement:
24,860 t light; 26,348 t standard; 30,438 t normal; 33,710 t full load

Dimensions: Length overall / water x beam x draught
809.36 ft / 785.00 ft x 78.00 ft (Bulges 90.00 ft) x 30.00 ft (normal load)
246.69 m / 239.27 m x 23.77 m (Bulges 27.43 m) x 9.14 m

Armament:
10 - 10.00" / 254 mm guns (5x2 guns), 529.11lbs / 240.00kg shells, 1946 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 2 raised mounts - superfiring
32 - 2.95" / 75.0 mm guns (16x2 guns), 12.00lbs / 5.44kg shells, 1946 Model
Automatic rapid fire guns in deck mounts with hoists
on side, evenly spread, 8 raised mounts
36 - 1.57" / 40.0 mm guns (6x6 guns), 2.00lbs / 0.91kg shells, 1946 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 4 raised mounts
40 - 0.98" / 25.0 mm guns (10x4 guns), 0.57lbs / 0.26kg shells, 1946 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 4 raised mounts
16 - 0.98" / 25.0 mm guns (4x4 guns), 0.00lbs / 0.00kg shells, 1946 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 5,770 lbs / 2,617 kg
Shells per gun, main battery: 265
112 - 4.7" / 120 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 10.0" / 254 mm 510.25 ft / 155.52 m 10.00 ft / 3.05 m
Ends: Unarmoured
Main Belt covers 100% of normal length

- Torpedo Bulkhead and Bulges:
2.00" / 51 mm 510.25 ft / 155.52 m 26.47 ft / 8.07 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 10.0" / 254 mm 5.00" / 127 mm 9.00" / 229 mm
2nd: 1.00" / 25 mm - 1.00" / 25 mm
3rd: 1.00" / 25 mm 1.00" / 25 mm -
4th: 1.00" / 25 mm 1.00" / 25 mm -

- Armour deck: 4.00" / 102 mm, Conning tower: 3.00" / 76 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 141,723 shp / 105,726 Kw = 32.50 kts
Range 20,000nm at 15.00 kts
Bunker at max displacement = 7,362 tons

Complement:
1,151 - 1,497

Cost:
£13.847 million / $55.386 million

Distribution of weights at normal displacement:
Armament: 699 tons, 2.3%
Armour: 8,269 tons, 27.2%
- Belts: 2,122 tons, 7.0%
- Torpedo bulkhead: 999 tons, 3.3%
- Armament: 1,937 tons, 6.4%
- Armour Deck: 3,147 tons, 10.3%
- Conning Tower: 63 tons, 0.2%
Machinery: 3,540 tons, 11.6%
Hull, fittings & equipment: 11,152 tons, 36.6%
Fuel, ammunition & stores: 5,578 tons, 18.3%
Miscellaneous weights: 1,200 tons, 3.9%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
53,860 lbs / 24,430 Kg = 107.7 x 10.0 " / 254 mm shells or 8.4 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 4.3 ft / 1.3 m
Roll period: 18.2 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.50
Seaboat quality (Average = 1.00): 1.51

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.503
Length to Beam Ratio: 8.72 : 1
'Natural speed' for length: 32.31 kts
Power going to wave formation at top speed: 52 %
Trim (Max stability = 0, Max steadiness = 100): 47
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 3.00 ft / 0.91 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 37.00 ft / 11.28 m
- Forecastle (20%): 27.00 ft / 8.23 m
- Mid (50%): 27.00 ft / 8.23 m
- Quarterdeck (15%): 27.00 ft / 8.23 m
- Stern: 27.00 ft / 8.23 m
- Average freeboard: 27.80 ft / 8.47 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 83.6%
- Above water (accommodation/working, high = better): 177.9%
Waterplane Area: 42,529 Square feet or 3,951 Square metres
Displacement factor (Displacement / loading): 137%
Structure weight / hull surface area: 152 lbs/sq ft or 740 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.53
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

4x4 25mm 5th gun mounts simmed for AA Rocket launcher mount.
12cm Rockets simmed as Torpedoes.

Actual shells per gun (879t)
10" = 150 rounds per gun (441 tons total)
75mm = 1500 rounds per gun (320 tons total)
40mm = 2000 rounds per gun (80 tons total)
25mm = 3000 rounds per gun (38 tons total)

1200t
- 200 tons for fire control and fire control center
- 100 tons for radar systems
- 249 tons for damage control and fire suppression systems
- 63 tons emergency diesel generators
- 249 tons for air condition system
- 161 tons for degaussing coils
- 25 tons for 12x28 12 cm AA Rocket launchers
- 86 for mount improvements
--- 64 tons for 75mm mounts 4t
--- 12 tons for 40mm mounts 2t
--- 10 tons for 25mm mounts 1t
- 67 tons for for crew comfort.

178

Thursday, June 18th 2015, 12:57am

1946 rebuild of the Fuso. A bit more armor, more modern weapons and extras. Compared to the original (non-valid) SS2 sim, I did try to sim the freeboard more correctly as I do it now with the mid break at ~70% instead of a lowered quarterdeck... although I think I may need to use another option for a correct main gun layout due to P and Q turrets...

Fuso, Japan Senkan laid down 1914 (Engine 1946)

Displacement:
33,321 t light; 35,507 t standard; 39,435 t normal; 42,578 t full load

Dimensions: Length overall / water x beam x draught
717.88 ft / 710.00 ft x 97.00 ft (Bulges 108.00 ft) x 30.00 ft (normal load)
218.81 m / 216.41 m x 29.57 m (Bulges 32.92 m) x 9.14 m

Armament:
12 - 14.17" / 360 mm guns (6x2 guns), 1,400.00lbs / 635.03kg shells, 1946 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, 3 raised mounts - superfiring
16 - 5.00" / 127 mm guns in single mounts, 55.12lbs / 25.00kg shells, 1946 Model
Quick firing guns in casemate mounts
on side, all forward
16 guns in hull casemates - Limited use in heavy seas
20 - 2.95" / 75.0 mm guns (10x2 guns), 12.00lbs / 5.44kg shells, 1946 Model
Automatic rapid fire guns in deck mounts with hoists
on side, evenly spread
36 - 1.57" / 40.0 mm guns (6x6 guns), 2.00lbs / 0.91kg shells, 1946 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
56 - 0.98" / 25.0 mm guns (14x4 guns), 0.57lbs / 0.26kg shells, 1946 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 18,026 lbs / 8,176 kg
Shells per gun, main battery: 137
168 - 4.7" / 120 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 14.0" / 356 mm 465.00 ft / 141.73 m 12.00 ft / 3.66 m
Ends: Unarmoured
Main Belt covers 101% of normal length

- Torpedo Bulkhead and Bulges:
2.00" / 51 mm 465.00 ft / 141.73 m 29.00 ft / 8.84 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 16.0" / 406 mm 10.0" / 254 mm 14.0" / 356 mm
2nd: 4.00" / 102 mm - 4.00" / 102 mm
3rd: 1.00" / 25 mm - 1.00" / 25 mm
4th: 1.00" / 25 mm 1.00" / 25 mm -
5th: 1.00" / 25 mm 1.00" / 25 mm -

- Armour deck: 5.50" / 140 mm, Conning tower: 18.00" / 457 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 65,359 shp / 48,758 Kw = 24.00 kts
Range 10,000nm at 18.00 kts
Bunker at max displacement = 7,072 tons

Complement:
1,398 - 1,818

Cost:
£4.246 million / $16.984 million

Distribution of weights at normal displacement:
Armament: 2,311 tons, 5.9%
Armour: 14,091 tons, 35.7%
- Belts: 3,364 tons, 8.5%
- Torpedo bulkhead: 998 tons, 2.5%
- Armament: 4,154 tons, 10.5%
- Armour Deck: 5,125 tons, 13.0%
- Conning Tower: 449 tons, 1.1%
Machinery: 1,632 tons, 4.1%
Hull, fittings & equipment: 13,937 tons, 35.3%
Fuel, ammunition & stores: 6,115 tons, 15.5%
Miscellaneous weights: 1,350 tons, 3.4%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
53,684 lbs / 24,350 Kg = 37.7 x 14.2 " / 360 mm shells or 9.8 torpedoes
Stability (Unstable if below 1.00): 1.11
Metacentric height 5.8 ft / 1.8 m
Roll period: 18.8 seconds
Steadiness - As gun platform (Average = 50 %): 56 %
- Recoil effect (Restricted arc if above 1.00): 0.47
Seaboat quality (Average = 1.00): 1.11

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.600
Length to Beam Ratio: 6.57 : 1
'Natural speed' for length: 26.65 kts
Power going to wave formation at top speed: 45 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21.65 ft / 6.60 m
- Forecastle (20%): 18.65 ft / 5.68 m
- Mid (70%): 18.65 ft / 5.68 m (11.60 ft / 3.54 m aft of break)
- Quarterdeck (15%): 11.60 ft / 3.54 m
- Stern: 11.60 ft / 3.54 m
- Average freeboard: 16.78 ft / 5.11 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 78.9%
- Above water (accommodation/working, high = better): 106.9%
Waterplane Area: 50,370 Square feet or 4,680 Square metres
Displacement factor (Displacement / loading): 106%
Structure weight / hull surface area: 200 lbs/sq ft or 974 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.02
- Longitudinal: 0.99
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate


Actual 25mm mounts: 8x4 (= 32 guns)
6x4 25mm mounts simmed for AA Rocket launcher mount.
12cm Rockets simmed as Torpedoes.

Actual shells per gun (1398t)
36cm = 100 rounds per gun (933 tons total)
5" = 315 rounds per gun (154 tons total)
75mm = 1500 rounds per gun (200 tons total)
40mm = 2000 rounds per gun (80 tons total)
25mm = 3000 rounds per gun (31 tons total)


1350t
- 200 tons for fire control and fire control center
- 100 tons for radar systems
- 334 tons for damage control and fire suppression systems
- 84 tons emergency diesel generators
- 334 tons for air condition system
- 144 tons for degaussing coils
- 38 tons for 6x28 12 cm AA Rocket launchers
- 60 for mount improvements
--- 40 tons for 75mm mounts
--- 12 tons for 40mm mounts
--- 8 tons for 25mm mounts
- 56 tons for for crew comfort.

HoOmAn

Keeper of the Sacred Block Coefficient

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179

Thursday, June 18th 2015, 9:32am

A modification of midbreak/lowered quarterdeck requires a 75% rebuild, right?

I must admit I have not fully understood how you sim those rockets. Can you please explain?

180

Thursday, June 18th 2015, 6:32pm

Quoted

A modification of midbreak/lowered quarterdeck requires a 75% rebuild, right?

The way the freeboard is simmed in the sim above is what it should have been from the very start. This is not a modification of the ship's structure but a correction in the way the freeboard should be simmed. Waaaaaaaaaaaaaaaaaaaaaaaaaay back in the beginning of Wesworld I originally simmed it as a lowered quarterdeck. Now some 10 years later I am much wiser and I know that that is the completely wrong way to sim it and that the proper way to do it is to use the midbreak and move it backward to the correct point (though I will admit that I should have measured on the picture exactly where it ends up). I did the same with the Nagato when I rebuilt her and the Mutsu in the late 30s.

Quoted

I must admit I have not fully understood how you sim those rockets. Can you please explain?

Well according to Navweaps...

Quoted

These mountings were adapted from the 25 mm AA triple gun mounting and could be controlled by Ward-Leonard RPC or by two men in protected cabs. The launcher resembled a large box which consisted of four rows of seven rockets each.

... so I do just that but with the quad 25mm mounts instead because I decided to change from the triples to quads a bit earlier in the 1940s. So in case of the Fuso of the 14 25mm mounts that are simmed, 8 actually contain 25mm guns while the remaining 6 are adapted mounts for the 12cm AA rockets and do not contain any 25mm guns (but they do add a bit of weight).

Now I cannot remember how I got to that weight but I use 6.25 tons per 4x7 box of rockets. And IIRC there had been some discussion in the past regarding rockets and that they are more about taking up space than actual weight (or something like that). So I therefore use the torpedoes to sim the rockets as well because (if I am not mistaken) simming torpedoes may not add any weight to the design but they do take up space. Besides that gives you an idea how many worthless toothpicks rockets there are on the ship. :)

So in short: one 25mm quad mount per launcher, 6.25 tons misc weight per launcher, 28 120mm torpedoes per launcher.

Not sure if it is correct but at least it is something. Same goes for the various other things I add to the ships like damage control and fire suppression systems (1 ton per 100 tons light displacement), emergency diesel generators(1 ton per 400 tons light displacement), air condition system(1 ton per 100 tons light displacement), degaussing coils (1 ton per 5 feet of length (oa)) , and mount improvements (1t per 25mm mount, 2t per 40mm mount 4t per 75mm mount and I forgot how much I add for the 105 and 5" mounts).