OSK Duradi - Revolutionary-class Battleship (1915)

OSK  Duradi, Oltrin State Revolutionary-class Battleship laid down 1915

Displacement:
	28,604 t light; 30,878 t standard; 33,189 t normal; 35,038 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(656.39 ft / 648.00 ft) x 97.50 ft x (31.70 / 33.13 ft)
	(200.07 m / 197.51 m) x 29.72 m  x (9.66 / 10.10 m)

Armament:
      10 - 16.00" / 406 mm 45.0 cal guns - 2,049.99lbs / 929.86kg shells, 125 per gun
	  Breech loading guns in turret on barbette mounts, 1913 Model
	  3 x Twin mounts on centreline, forward deck forward
		1 raised mount - superfiring
	  2 x Twin mounts on centreline, aft deck aft
		1 raised mount aft - superfiring
      12 - 5.50" / 140 mm 47.0 cal guns - 85.01lbs / 38.56kg shells, 300 per gun
	  Breech loading guns in casemate mounts, 1912 Model
	  8 x Single mounts on sides, forward evenly spread
		8 hull mounts in casemates- Limited use in all but light seas
	  4 x Single mounts on sides, aft deck forward
		4 hull mounts in casemates- Limited use in all but light seas
      6 - 2.50" / 63.5 mm 52.0 cal guns - 12.50lbs / 5.67kg shells, 400 per gun
	  Anti-air guns in deck mounts, 1910 Model
	  6 x Single mounts on sides, evenly spread
		2 raised mounts
      Weight of broadside 21,595 lbs / 9,795 kg
      Main Torpedoes
      2 - 21.7" / 550 mm, 32.81 ft / 10.00 m torpedoes - 2.163 t each, 4.326 t total
	submerged side tubes
      2nd Torpedoes
      2 - 21.7" / 550 mm, 32.81 ft / 10.00 m torpedoes - 2.163 t each, 4.326 t total
	below water reloads

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	14.5" / 368 mm	414.72 ft / 126.41 m	12.00 ft / 3.66 m
	Ends:	3.50" / 89 mm	233.26 ft / 71.10 m	12.00 ft / 3.66 m
	Upper:	3.50" / 89 mm	414.72 ft / 126.41 m	8.00 ft / 2.44 m
	  Main Belt covers 98 % of normal length
	  Main Belt inclined -4.00 degrees (positive = in)

   - Torpedo Bulkhead - Additional damage containing bulkheads:
		3.20" / 81 mm	414.72 ft / 126.41 m	29.61 ft / 9.03 m
	Beam between torpedo bulkheads 68.40 ft / 20.85 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	16.0" / 406 mm	7.00" / 178 mm		12.5" / 318 mm
	2nd:	4.50" / 114 mm	      -			      -
	3rd:	0.50" / 13 mm	      -			      -

   - Armoured deck - single deck:
	For and Aft decks: 3.20" / 81 mm
	Forecastle: 2.50" / 64 mm  Quarter deck: 2.50" / 64 mm

   - Conning towers: Forward 13.00" / 330 mm, Aft 8.00" / 203 mm

Machinery:
	Oil fired boilers, steam turbines,
	Geared drive, 4 shafts, 35,878 shp / 26,765 Kw = 21.00 kts
	Range 9,000nm at 13.00 kts
	Bunker at max displacement = 4,160 tons

Complement:
	1,229 - 1,598

Cost:
	£4.612 million / $18.449 million

Distribution of weights at normal displacement:
	Armament: 3,538 tons, 10.7 %
	   - Guns: 3,524 tons, 10.6 %
	   - Weapons: 14 tons, 0.0 %
	Armour: 11,637 tons, 35.1 %
	   - Belts: 4,008 tons, 12.1 %
	   - Torpedo bulkhead: 1,454 tons, 4.4 %
	   - Armament: 3,119 tons, 9.4 %
	   - Armour Deck: 2,588 tons, 7.8 %
	   - Conning Towers: 467 tons, 1.4 %
	Machinery: 1,359 tons, 4.1 %
	Hull, fittings & equipment: 11,970 tons, 36.1 %
	Fuel, ammunition & stores: 4,585 tons, 13.8 %
	Miscellaneous weights: 100 tons, 0.3 %
	   - On freeboard deck: 100 tons

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  40,015 lbs / 18,150 Kg = 19.5 x 16.0 " / 406 mm shells or 4.4 torpedoes
	Stability (Unstable if below 1.00): 1.07
	Metacentric height 5.5 ft / 1.7 m
	Roll period: 17.5 seconds
	Steadiness	- As gun platform (Average = 50 %): 53 %
			- Recoil effect (Restricted arc if above 1.00): 0.84
	Seaboat quality  (Average = 1.00): 1.06

Hull form characteristics:
	Hull has rise forward of midbreak,
	  a normal bow and a cruiser stern
	Block coefficient (normal/deep): 0.580 / 0.586
	Length to Beam Ratio: 6.65 : 1
	'Natural speed' for length: 25.46 kts
	Power going to wave formation at top speed: 40 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): 25.00 degrees
	Stern overhang: -6.00 ft / -1.83 m
	Freeboard (% = length of deck as a percentage of waterline length):
				Fore end,	 Aft end
	   - Forecastle:	18.00 %,  18.00 ft / 5.49 m,  18.00 ft / 5.49 m
	   - Forward deck:	46.00 %,  18.00 ft / 5.49 m,  18.00 ft / 5.49 m
	   - Aft deck:	18.00 %,  10.00 ft / 3.05 m,  10.00 ft / 3.05 m
	   - Quarter deck:	18.00 %,  10.00 ft / 3.05 m,  10.00 ft / 3.05 m
	   - Average freeboard:		15.12 ft / 4.61 m
	Ship tends to be wet forward

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 98.3 %
		- Above water (accommodation/working, high = better): 110.7 %
	Waterplane Area: 45,351 Square feet or 4,213 Square metres
	Displacement factor (Displacement / loading): 100 %
	Structure weight / hull surface area: 216 lbs/sq ft or 1,053 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.97
		- Longitudinal: 1.30
		- Overall: 1.00
	Adequate machinery, storage, compartmentation space
	Adequate accommodation and workspace room

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Misc Weight:

Flag Facilities = 100 tons.


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Special Notes:
Armor Belt is 13" of Face-Hardened Tarmi-Sox Steel + 1.5" Rolled Homogenous Steel laminated.