Improved Oyodo Class Light Cruiser

An Oyodo with much better fighting capabilities. This one is equipped with 15 155mm Guns in 5 triple turrets instead of the original 6 in 2 triple turrets.

The Simulation:

IJN Oyodo, Imperial Japanese Navy Light Cruiser laid down 1941

Displacement:
8 448 t light; 8 892 t standard; 10 850 t normal; 12 417 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(630,79 ft / 622,38 ft) x 55,77 ft x (21,33 / 23,67 ft)
(192,26 m / 189,70 m) x 17,00 m x (6,50 / 7,21 m)

Armament:
15 - 6,10" / 155 mm 60,0 cal guns - 123,17lbs / 55,87kg shells, 150 per gun
Breech loading guns in deck and hoist mounts, 1930 Model
4 x 3-gun mounts on centreline, evenly spread
2 raised mounts
1 x 3-gun mount on centreline, forward deck aft
1 double raised mount
8 - 3,94" / 100,0 mm 65,0 cal guns - 28,66lbs / 13,00kg shells, 400 per gun
Anti-air guns in deck and hoist mounts, 1938 Model
4 x Twin mounts on sides, evenly spread
38 - 0,98" / 25,0 mm 60,0 cal guns - 0,53lbs / 0,24kg shells, 2 000 per gun
Anti-air guns in deck mounts, 1935 Model
6 x Triple mounts on centreline, evenly spread
6 raised mounts
20 x Single mounts on sides, evenly spread
Weight of broadside 2 097 lbs / 951 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2,95" / 75 mm 347,77 ft / 106,00 m 12,80 ft / 3,90 m
Ends: 1,57" / 40 mm 186,68 ft / 56,90 m 8,53 ft / 2,60 m
87,93 ft / 26,80 m Unarmoured ends
Main Belt covers 86 % of normal length
Main belt does not fully cover magazines and engineering spaces
Main Belt inclined 30,00 degrees (positive = in)

- Torpedo Bulkhead - Strengthened structural bulkheads:
2,36" / 60 mm 347,77 ft / 106,00 m 18,44 ft / 5,62 m
Beam between torpedo bulkheads 48,23 ft / 14,70 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2,17" / 55 mm 0,98" / 25 mm 0,79" / 20 mm
2nd: 0,98" / 25 mm 0,98" / 25 mm 0,79" / 20 mm

- Armoured deck - single deck:
For and Aft decks: 1,97" / 50 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 75 974 shp / 56 677 Kw = 31,00 kts
Range 10 721nm at 18,00 kts
Bunker at max displacement = 3 525 tons

Complement:
531 - 691

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
12 096 lbs / 5 487 Kg = 106,5 x 6,1 " / 155 mm shells or 2,1 torpedoes
Metacentric height 2,5 ft / 0,8 m
Roll period: 14,7 seconds

Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
'Natural speed' for length: 24,95 kts
Power going to wave formation at top speed: 52 %
Ship tends to be wet forward

Ship space, strength and comments:
Waterplane Area: 23 405 Square feet or 2 174 Square metres
Adequate machinery, storage, compartmentation space
Adequate accommodation and workspace room
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather