Rina Inbaasu, Japan Light Cruiser laid down 1933
Displacement:
5,437 t light; 5,851 t standard; 6,889 t normal; 7,719 t full load
Dimensions: Length overall / water x beam x draught
562.83 ft / 556.00 ft x 56.00 ft x 17.00 ft (normal load)
171.55 m / 169.47 m x 17.07 m x 5.18 m
Armament:
12 - 5.12" / 130 mm guns (6x2 guns), 65.00lbs / 29.48kg shells, 1930 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, 4 raised mounts - superfiring
16 - 2.95" / 75.0 mm guns (8x2 guns), 12.00lbs / 5.44kg shells, 1930 Model
Dual purpose guns in deck mounts with hoists
on side ends, evenly spread, 4 raised mounts - superfiring
8 - 1.97" / 50.0 mm guns (2x4 guns), 4.00lbs / 1.81kg shells, 1926 Model
Anti-aircraft guns in deck mounts
on centreline ends, evenly spread
12 - 0.98" / 25.0 mm guns (4x3 guns), 0.57lbs / 0.26kg shells, 1926 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
16 - 0.52" / 13.2 mm guns (4x4 guns), 0.09lbs / 0.04kg shells, 1930 Model
Machine guns in deck mounts
on side, evenly spread, 2 raised mounts
Weight of broadside 1,012 lbs / 459 kg
Shells per gun, main battery: 450
8 - 24.0" / 609.6 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2.00" / 51 mm 405.00 ft / 123.44 m 9.00 ft / 2.74 m
Ends: Unarmoured
Main Belt covers 112 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.00" / 76 mm 1.00" / 25 mm 2.00" / 51 mm
2nd: 2.00" / 51 mm 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 -
5th: 0.50" / 13 mm 0.50" / 13 mm -
- Armour deck: 1.25" / 32 mm, Conning tower: 2.75" / 70 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 3 shafts, 58,346 shp / 43,526 Kw = 32.00 kts
Range 11,000nm at 15.00 kts
Bunker at max displacement = 1,868 tons
Complement:
377 - 491
Cost:
£2.545 million / $10.179 million
Distribution of weights at normal displacement:
Armament: 131 tons, 1.9 %
Armour: 922 tons, 13.4 %
- Belts: 298 tons, 4.3 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 124 tons, 1.8 %
- Armour Deck: 479 tons, 7.0 %
- Conning Tower: 21 tons, 0.3 %
Machinery: 1,700 tons, 24.7 %
Hull, fittings & equipment: 2,484 tons, 36.1 %
Fuel, ammunition & stores: 1,451 tons, 21.1 %
Miscellaneous weights: 200 tons, 2.9 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
7,675 lbs / 3,481 Kg = 114.5 x 5.1 " / 130 mm shells or 1.3 torpedoes
Stability (Unstable if below 1.00): 1.17
Metacentric height 2.8 ft / 0.9 m
Roll period: 14.0 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.34
Seaboat quality (Average = 1.00): 1.03
Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.456
Length to Beam Ratio: 9.93 : 1
'Natural speed' for length: 27.07 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 68
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: 25.50 ft / 7.77 m
- Forecastle (20 %): 15.70 ft / 4.79 m
- Mid (50 %): 15.70 ft / 4.79 m
- Quarterdeck (15 %): 15.70 ft / 4.79 m
- Stern: 14.00 ft / 4.27 m
- Average freeboard: 16.36 ft / 4.99 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 101.2 %
- Above water (accommodation/working, high = better): 126.4 %
Waterplane Area: 20,727 Square feet or 1,926 Square metres
Displacement factor (Displacement / loading): 124 %
Structure weight / hull surface area: 80 lbs/sq ft or 393 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.88
- Longitudinal: 1.01
- Overall: 0.90
Caution: Hull subject to strain in open-sea
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
78 tons for additional armament weight (train and elevation motors armor)
25 tons plane
25 tons crane and catapult
44 tons for Torpedoes (16)
15 tons for improved FC
6 tons improved communication system
6 tons improved flooding and pumping system
6 tons improved generators
5 tons Air conditioning system