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Saturday, October 2nd 2004, 10:31pm

F.2. Battle Cruisers

Battlecruisers of the Japanese Navy.

Data here is the data released to the public

Tachibana Class
HIJMS Ginchiyo
HIJMS Nouhime
HIJMS Oichi

Dimensions: 800.00 ft x 90.00 ft x 32.00 ft
Standard Displacement: 33,395 tons
Armament: 3x2 - 38.0 cm / 50 cal Model 1933 guns
8x2 - 13.0 cm / 50 cal Model 1930 DP guns
32 - 40 mm / 39 cal Model 1923 AA guns
30 - 25 mm / 60 cal Model 1926 light AA guns
32 - 13.2mm / 65 cal Model 1930 Machineguns
Planes: 3
Armour:
Belt 320mm + 10mm backing plate, Main turrets 360mm, 2nd turrets 3.00"
AA gun shields 1.00", Light gun shields 1.00", MG shields 0.50"
Armour deck 110mm, Conning tower 70mm
Machinery: 16 Kanpon oil fired boilers, Brown Curtis geared steam turbines,
Geared drive, 4 shafts, 175,000 shp = 31.00 kts
Range 6,500nm at 18.00 kts
Complement: 55 Officers, 1690 other rank

This post has been edited 1 times, last edit by "Rooijen10" (Dec 24th 2006, 10:25pm)


2

Sunday, December 24th 2006, 10:18pm

Edit: Changed the Yamato style freeboard to a bit more normal freeboard like on Canis's Kongo Replacement here:

The difference between the higher part and the lower QD is a real guess...


Tachibana, Japan Battle Cruiser laid down 1933

Displacement:
33,460 t light; 35,130 t standard; 38,183 t normal; 40,624 t full load

Dimensions: Length overall / water x beam x draught
822.30 ft / 800.00 ft x 90.00 ft x 32.00 ft (normal load)
250.64 m / 243.84 m x 27.43 m x 9.75 m

Armament:
6 - 14.96" / 380 mm guns (3x2 guns), 2,000.00lbs / 907.18kg shells, 1933 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
22 - 5.00" / 127 mm guns (11x2 guns), 55.12lbs / 25.00kg shells, 1930 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships, 7 raised mounts - superfiring
32 - 1.57" / 40.0 mm guns (4x8 guns), 2.00lbs / 0.91kg shells, 1923 Model
Anti-aircraft guns in deck mounts
on side ends, evenly spread, all raised mounts - superfiring
30 - 0.98" / 25.0 mm guns (10x3 guns), 0.57lbs / 0.26kg shells, 1933 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 4 raised mounts
32 - 0.52" / 13.2 mm guns (8x4 guns), 0.09lbs / 0.04kg shells, 1930 Model
Machine guns in deck mounts
on side, evenly spread, 4 raised mounts
Weight of broadside 13,296 lbs / 6,031 kg
Shells per gun, main battery: 120

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 13.0" / 330 mm 508.53 ft / 155.00 m 13.78 ft / 4.20 m
Ends: Unarmoured
Main Belt covers 98% of normal length

- Torpedo Bulkhead:
1.77" / 45 mm 508.53 ft / 155.00 m 29.86 ft / 9.10 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 14.2" / 360 mm 6.69" / 170 mm 13.4" / 340 mm
2nd: 3.00" / 76 mm 1.00" / 25 mm 2.00" / 51 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: 4.33" / 110 mm, Conning tower: 2.76" / 70 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 177,466 shp / 132,389 Kw = 33.00 kts
Range 7,550nm at 18.00 kts
Bunker at max displacement = 5,494 tons

Complement:
1,365 - 1,775

Cost:
£14.666 million / $58.665 million

Distribution of weights at normal displacement:
Armament: 1,437 tons, 3.8%
Armour: 11,731 tons, 30.7%
- Belts: 3,859 tons, 10.1%
- Torpedo bulkhead: 995 tons, 2.6%
- Armament: 2,496 tons, 6.5%
- Armour Deck: 4,314 tons, 11.3%
- Conning Tower: 67 tons, 0.2%
Machinery: 5,171 tons, 13.5%
Hull, fittings & equipment: 14,321 tons, 37.5%
Fuel, ammunition & stores: 4,723 tons, 12.4%
Miscellaneous weights: 800 tons, 2.1%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
51,077 lbs / 23,168 Kg = 30.5 x 15.0 " / 380 mm shells or 6.7 torpedoes
Stability (Unstable if below 1.00): 1.08
Metacentric height 5.0 ft / 1.5 m
Roll period: 17.0 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.82
Seaboat quality (Average = 1.00): 1.01

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.580
Length to Beam Ratio: 8.89 : 1
'Natural speed' for length: 32.29 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 4.00 ft / 1.22 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 31.70 ft / 9.66 m
- Forecastle (20%): 23.70 ft / 7.22 m
- Mid (75%): 23.70 ft / 7.22 m
- Quarterdeck (15%): 21.70 ft / 6.61 m
- Stern: 21.70 ft / 6.61 m
- Average freeboard: 23.94 ft / 7.30 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 97.4%
- Above water (accommodation/working, high = better): 176.9%
Waterplane Area: 53,843 Square feet or 5,002 Square metres
Displacement factor (Displacement / loading): 111%
Structure weight / hull surface area: 181 lbs/sq ft or 883 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.98
- Longitudinal: 1.26
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent


Features:
- Official standard displacement 33,395 tons
- Ships: 3. Ginchiyo, Nouhime, Oichi.
- 1 secodary turret superfiring the main gun turrets forward, 2 secondary turrets superfiring the main gun turrets aft, remaining secondary gun turrets four on each side
- 60 APC - 2100 lbs and 60 HE - 1900 lbs. Also able to use 'San Shiki' AA projectiles (1900 lbs)
- Main belt is 320mm Kaisanshi ('Result 3-4') Steel with 10mm Ducol steel plate backing. Main belt inclined at 20 degrees.
- 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 (both > than what SS gives).
- Transom stern for the use of the 'Hain mat' system.
- New Type 93 Fire Control System, superior to any other FCS in the world.
- High quality optics and 12m rangefinder allow for exceptional range estimation and a high degree of accuracy in shooting.
- 38cm/50 caliber Type 93 main gun, an improved version of the 38cm/45 caliber Type 85 gun used aboard the monitor Hideyoshi Hashiba. Range greater than 40 kilometers.
- Semi-automatic loading system for the 5 inch/40 caliber Type 93 secondary gun


Miscellaneous weight
4 Planes => 100 tons
1 Crane + 2 catapults => 35 tons
Staff Facilities => 50 tons
Improvements to communication system => 10 tons
Improvements to flooding and pumping system => 10 tons
Improvements to generators => 10 tons
Air conditioning system => 20 tons
Superior Fire Control System => total 157 tons
----- fire control center (including Type 91 'Sokutekiban' and Type 91 'Shagekiban', etc.) => 47 tons
----- 1x 15m foretop rotating dome + Type 91 low angle 'Hoiban' director => 10 tons
----- 3x 12m main turrets => 15 tons
----- 1x 10.5m aft control center in rotating dome+ Type 91 low angle 'Hoiban' director => 8 tons
----- 2x 4.5m for secondary armament => 8 tons
----- 12x 4.5m secondary turrets => 24 tons
----- 4x 1.5m 2pdr armament => 12 tons
----- 4x MG control tower 25mm and 13.2mm => 8 tons
----- The new and improved (size-wise) Tomoe Tele Raypointer => 25 tons.
Superior weapons loading system => 94 tons
----- 38cm => 57.9 tons
----- 5 inch => 22 tons
----- 2pdr => 8 tons
----- 25mm => 4.5 tons
----- 13.2mm => 1.6 tons
Superior weapon elevation and train control => 143 tons
----- 38cm => 90 tons
----- 5 inch => 33 tons
----- 2pdr => 8 tons
----- 25mm => 8 tons
----- 13.2mm => 4 tons
Hain Mat System => 20 tons
additional 280 5 inch per gun (for a total of 400 shells per gun) => 151 tons
Total => 800 tons

This post has been edited 8 times, last edit by "Rooijen10" (May 7th 2008, 8:25pm)