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