Well not
that small. You'd need to blow up the bath in order to get the ship in there.
Except for speed and a slightly tweaked freeboard, the sim below is 1:7.5 scale.
Muteki Nippon, Japan 1:7.5 Scale model laid down 1940
Displacement:
487 t light; 505 t standard; 511 t normal; 517 t full load
Dimensions: Length overall / water x beam x draught
145.36 ft / 139.87 ft x 25.33 ft (Bulges 28.00 ft) x 6.53 ft (normal load)
44.31 m / 42.63 m x 7.72 m (Bulges 8.53 m) x 1.99 m
Armament:
15 - 2.41" / 61.3 mm guns (5x3 guns), 7.04lbs / 3.19kg shells, 1940 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 3 raised mounts - superfiring
68 - 0.67" / 16.9 mm guns (32 mounts), 0.15lbs / 0.07kg shells, 1940 Model
Automatic rapid fire guns in deck mounts with hoists
on side, all amidships, all raised mounts - superfiring
64 - 0.21" / 5.3 mm guns (16x4 guns), 0.00lbs / 0.00kg shells, 1940 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 8 raised mounts
168 - 0.13" / 3.3 mm guns (56x3 guns), 0.00lbs / 0.00kg shells, 1940 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 12 raised mounts
Weight of broadside 116 lbs / 53 kg
Shells per gun, main battery: 100
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2.40" / 61 mm 130.00 ft / 39.62 m 2.93 ft / 0.89 m
Ends: 2.40" / 61 mm 53.33 ft / 16.25 m 2.93 ft / 0.89 m
Upper: 0.12" / 3 mm 130.00 ft / 39.62 m 2.93 ft / 0.89 m
Main Belt covers 143% of normal length
- Torpedo Bulkhead and Bulges:
0.40" / 10 mm 130.00 ft / 39.62 m 11.79 ft / 3.59 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.46" / 88 mm 2.13" / 54 mm 2.93" / 74 mm
2nd: 0.40" / 10 mm 0.13" / 3 mm 0.27" / 7 mm
3rd: 0.13" / 3 mm 0.13" / 3 mm -
4th: 0.13" / 3 mm 0.13" / 3 mm -
- Armour deck: 2.13" / 54 mm, Conning tower: 4.00" / 102 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 6 shafts, 245 shp / 183 Kw = 10.00 kts
Range 2,667nm at 5.00 kts
Bunker at max displacement = 12 tons
Complement:
53 - 69
Cost:
£0.182 million / $0.729 million
Distribution of weights at normal displacement:
Armament: 15 tons, 2.9%
Armour: 270 tons, 52.8%
- Belts: 53 tons, 10.3%
- Torpedo bulkhead: 23 tons, 4.4%
- Armament: 72 tons, 14.1%
- Armour Deck: 117 tons, 22.8%
- Conning Tower: 6 tons, 1.1%
Machinery: 7 tons, 1.3%
Hull, fittings & equipment: 186 tons, 36.3%
Fuel, ammunition & stores: 24 tons, 4.8%
Miscellaneous weights: 10 tons, 2.0%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,720 lbs / 780 Kg = 244.3 x 2.4 " / 61 mm shells or 2.0 torpedoes
Stability (Unstable if below 1.00): 1.08
Metacentric height 0.7 ft / 0.2 m
Roll period: 13.7 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.25
Seaboat quality (Average = 1.00): 1.00
Hull form characteristics:
Hull has low quarterdeck
and transom stern
Block coefficient: 0.700
Length to Beam Ratio: 5.00 : 1
'Natural speed' for length: 14.02 kts
Power going to wave formation at top speed: 44 %
Trim (Max stability = 0, Max steadiness = 100): 51
Bow angle (Positive = bow angles forward): 40.00 degrees
Stern overhang: 0.27 ft / 0.08 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 6.22 ft / 1.90 m
- Forecastle (31%): 4.91 ft / 1.50 m
- Mid (43%): 5.57 ft / 1.70 m
- Quarterdeck (15%): 4.65 ft / 1.42 m (5.57 ft / 1.70 m before break)
- Stern: 4.65 ft / 1.42 m
- Average freeboard: 5.35 ft / 1.63 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 140.2%
- Above water (accommodation/working, high = better): 58.6%
Waterplane Area: 2,965 Square feet or 276 Square metres
Displacement factor (Displacement / loading): 124%
Structure weight / hull surface area: 48 lbs/sq ft or 232 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.08
- Longitudinal: 1.29
- Overall: 1.09
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped