[SIZE=1]Picture is a slightly modified version of CanisD's picture of his hypothetical fast Yamato. Used with his permission.[/SIZE]
Yamato, Japan Senkan laid down 1936
Displacement:
75,000 t light; 79,312 t standard; 85,791 t normal; 90,973 t full load
Dimensions: Length overall / water x beam x draught
961.89 ft / 940.00 ft x 122.00 ft (Bulges 132.00 ft) x 37.00 ft (normal load)
293.18 m / 286.51 m x 37.19 m (Bulges 40.23 m) x 11.28 m
Armament:
9 - 18.11" / 460 mm guns (3x3 guns), 3,913.21lbs / 1,775.00kg shells, 1936 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
6 - 5.91" / 150 mm guns (2x3 guns), 105.00lbs / 47.63kg shells, 1932 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, all raised mounts
40 - 5.00" / 127 mm guns (20x2 guns), 55.12lbs / 25.00kg shells, 1932 Model
Automatic rapid fire guns in deck mounts with hoists
on side, all amidships, all raised mounts - superfiring
48 - 1.57" / 40.0 mm guns (6x8 guns), 2.00lbs / 0.91kg shells, 1923 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
96 - 0.98" / 25.0 mm guns (32x3 guns), 0.57lbs / 0.26kg shells, 1935 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 12 raised mounts
104 - 0.52" / 13.2 mm guns (26x4 guns), 0.09lbs / 0.04kg shells, 1930 Model
Machine guns in deck mounts
on side, evenly spread, 10 raised mounts
Weight of broadside 38,246 lbs / 17,348 kg
Shells per gun, main battery: 120
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 16.9" / 429 mm 520.00 ft / 158.50 m 16.50 ft / 5.03 m
Ends: 14.0" / 356 mm 120.00 ft / 36.58 m 8.00 ft / 2.44 m
300.00 ft / 91.44 m Unarmoured ends
Upper: 2.25" / 57 mm 520.00 ft / 158.50 m 28.00 ft / 8.53 m
Main Belt covers 85% of normal length
- Torpedo Bulkhead and Bulges:
3.00" / 76 mm 520.00 ft / 158.50 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: 6.00" / 152 mm 3.00" / 76 mm 4.00" / 102 mm
3rd: 3.00" / 76 mm 1.00" / 25 mm 2.00" / 51 mm
4th: 1.00" / 25 mm 1.00" / 25 mm -
5th: 1.00" / 25 mm 1.00" / 25 mm -
6th: 0.50" / 13 mm 0.50" / 13 mm -
- Armour deck: 9.00" / 229 mm, Conning tower: 20.00" / 508 mm
Machinery:
Oil fired boilers, steam turbines plus diesel motors,
Geared drive, 4 shafts, 200,000 shp / 149,200 Kw = 29.91 kts
Range 10,000nm at 18.00 kts
Bunker at max displacement = 11,661 tons
Complement:
2,506 - 3,258
Cost:
£34.889 million / $139.557 million
Distribution of weights at normal displacement:
Armament: 3,817 tons, 4.4%
Armour: 33,724 tons, 39.3%
- Belts: 8,380 tons, 9.8%
- Torpedo bulkhead: 2,886 tons, 3.4%
- Armament: 6,301 tons, 7.3%
- Armour Deck: 15,318 tons, 17.9%
- Conning Tower: 838 tons, 1.0%
Machinery: 5,612 tons, 6.5%
Hull, fittings & equipment: 30,647 tons, 35.7%
Fuel, ammunition & stores: 10,791 tons, 12.6%
Miscellaneous weights: 1,200 tons, 1.4%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
136,700 lbs / 62,006 Kg = 46.0 x 18.1 " / 460 mm shells or 27.0 torpedoes
Stability (Unstable if below 1.00): 1.19
Metacentric height 9.2 ft / 2.8 m
Roll period: 18.2 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.51
Seaboat quality (Average = 1.00): 1.02
Hull form characteristics:
Hull has low quarterdeck
and transom stern
Block coefficient: 0.654
Length to Beam Ratio: 7.12 : 1
'Natural speed' for length: 35.38 kts
Power going to wave formation at top speed: 50 %
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: 28.40 ft / 8.66 m
- Forecastle (31%): 18.60 ft / 5.67 m
- Mid (43%): 23.50 ft / 7.16 m
- Quarterdeck (7%): 16.60 ft / 5.06 m (23.50 ft / 7.16 m before break)
- Stern: 16.60 ft / 5.06 m
- Average freeboard: 22.42 ft / 6.83 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 69.4%
- Above water (accommodation/working, high = better): 161.0%
Waterplane Area: 92,002 Square feet or 8,547 Square metres
Displacement factor (Displacement / loading): 112%
Structure weight / hull surface area: 250 lbs/sq ft or 1,221 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
- 16" Kai34 on 0.875" STS plate inclined 20 degrees. 2.25" STS outer hull shell (decapping plate (=upper belt)).
- Bulbous bow and improved fitting of the shaft brackets and the bilge keels for reduction in the hull resistance, resulting in higher speed and better fuel efficiency.
- 1.25-2" CNC and DS forecastle deck. 8-9" MNC armored deck over the vitals, 13.4" VH in front of A turret and behind X turret (sloped), 15" perforated MNC plates over the boiler uptakes. 2-3.15" CNC floors of the ammunition magazines.
- Main rudder room protected by armored box with 16" sides and 8" MNC top. Auxiliary rudder room protected by armored box with 12" sides and 8" MNC top.
- 60 APC - 1825 kg and 60 HEH - 1725 kg. Also able to use SSA 'San Shiki' AA projectiles (1600 kg) and HEL projectiles (1400 kg).
- Transom stern for the use of the 'Hain mat' system.
- Type 93 Fire Control System, superior to any other FCS in the world.
- High quality optics and 15m rangefinder allow for exceptional range estimation and a high degree of accuracy in shooting.
- Semi-automatic loading system for the 5 inch/40 caliber Type 93 secondary gun.