Milerai Iderni-Class Armored Cruiser [1903] (Calder)

Milerai Iderni-Class, Calder Republic Armored Cruiser laid down 1903

Displacement:
	8,641 t light; 9,000 t standard; 9,714 t normal; 10,285 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(403.54 ft / 393.70 ft) x 59.06 ft x (26.25 / 27.47 ft)
	(123.00 m / 120.00 m) x 18.00 m  x (8.00 / 8.37 m)

Armament:
      4 - 8.27" / 210 mm 45.0 cal guns - 284.97lbs / 129.26kg shells, 100 per gun
	  Breech loading guns in turret on barbette mounts, 1899 Model
	  2 x 2-gun mounts on centreline, evenly spread
      8 - 5.12" / 130 mm 47.0 cal guns - 69.73lbs / 31.63kg shells, 250 per gun
	  Quick firing guns in casemate mounts, 1900 Model
	  8 x Single mounts on sides, evenly spread
		8 hull mounts in casemates- Limited use in all but light seas
      8 - 2.95" / 75.0 mm 40.0 cal guns - 12.35lbs / 5.60kg shells, 400 per gun
	  Quick firing guns in deck mounts, 1892 Model
	  8 x Single mounts on sides, evenly spread
      8 - 0.98" / 25.0 mm 50.0 cal guns - 0.51lbs / 0.23kg shells, 1,000 per gun
	  Quick firing guns in deck mounts, 1903 Model
	  8 x Single mounts on centreline, evenly spread
		8 double raised mounts
      Weight of broadside 1,801 lbs / 817 kg
      Main Torpedoes
      2 - 21.0" / 533 mm, 22.97 ft / 7.00 m torpedoes - 1.221 t each, 2.442 t total
	submerged bow & stern tubes
      2nd Torpedoes
      8 - 21.0" / 533 mm, 22.97 ft / 7.00 m torpedoes - 1.221 t each, 9.769 t total
	below water reloads

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	5.91" / 150 mm	393.70 ft / 120.00 m	9.22 ft / 2.81 m
	Upper:	2.95" / 75 mm	393.70 ft / 120.00 m	8.01 ft / 2.44 m
	  Main Belt covers 154 % of normal length

   - Torpedo Bulkhead - Strengthened structural bulkheads:
		1.97" / 50 mm	255.91 ft / 78.00 m	24.08 ft / 7.34 m
	Beam between torpedo bulkheads 55.77 ft / 17.00 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	8.27" / 210 mm	3.94" / 100 mm		5.91" / 150 mm
	2nd:	5.12" / 130 mm	0.98" / 25 mm		5.12" / 130 mm
	3rd:	1.97" / 50 mm	0.98" / 25 mm		      -

   - Armoured deck - multiple decks:
	For and Aft decks: 1.97" / 50 mm
	Forecastle: 1.97" / 50 mm  Quarter deck: 1.97" / 50 mm

   - Conning towers: Forward 3.94" / 100 mm, Aft 0.00" / 0 mm

Machinery:
	Coal fired boilers, complex reciprocating steam engines,
	Direct drive, 2 shafts, 25,593 ihp / 19,092 Kw = 22.50 kts
	Range 5,500nm at 10.00 kts
	Bunker at max displacement = 1,285 tons (100% coal)

Complement:
	489 - 636

Cost:
	£0.977 million / $3.906 million

Distribution of weights at normal displacement:
	Armament: 455 tons, 4.7 %
	   - Guns: 438 tons, 4.5 %
	   - Weapons: 17 tons, 0.2 %
	Armour: 2,589 tons, 26.7 %
	   - Belts: 1,137 tons, 11.7 %
	   - Torpedo bulkhead: 449 tons, 4.6 %
	   - Armament: 364 tons, 3.7 %
	   - Armour Deck: 600 tons, 6.2 %
	   - Conning Tower: 39 tons, 0.4 %
	Machinery: 3,820 tons, 39.3 %
	Hull, fittings & equipment: 1,653 tons, 17.0 %
	Fuel, ammunition & stores: 1,073 tons, 11.0 %
	Miscellaneous weights: 125 tons, 1.3 %
	   - On freeboard deck: 25 tons
	   - Above deck: 100 tons

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  4,684 lbs / 2,125 Kg = 16.6 x 8.3 " / 210 mm shells or 1.0 torpedoes
	Stability (Unstable if below 1.00): 1.47
	Metacentric height 4.4 ft / 1.3 m
	Roll period: 11.8 seconds
	Steadiness	- As gun platform (Average = 50 %): 58 %
			- Recoil effect (Restricted arc if above 1.00): 0.19
	Seaboat quality  (Average = 1.00): 1.16

Hull form characteristics:
	Hull has raised forecastle,
	  a ram bow and a cruiser stern
	Block coefficient (normal/deep): 0.557 / 0.564
	Length to Beam Ratio: 6.67 : 1
	'Natural speed' for length: 19.84 kts
	Power going to wave formation at top speed: 57 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): -4.00 degrees
	Stern overhang: 3.28 ft / 1.00 m
	Freeboard (% = length of deck as a percentage of waterline length):
				Fore end,	 Aft end
	   - Forecastle:	20.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
	   - Forward deck:	30.00 %,  13.12 ft / 4.00 m,  13.12 ft / 4.00 m
	   - Aft deck:	35.00 %,  13.12 ft / 4.00 m,  13.12 ft / 4.00 m
	   - Quarter deck:	15.00 %,  13.12 ft / 4.00 m,  13.12 ft / 4.00 m
	   - Average freeboard:		14.44 ft / 4.40 m
	Ship tends to be wet forward

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 151.4 %
		- Above water (accommodation/working, high = better): 83.5 %
	Waterplane Area: 16,335 Square feet or 1,518 Square metres
	Displacement factor (Displacement / loading): 83 %
	Structure weight / hull surface area: 91 lbs/sq ft or 446 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.92
		- Longitudinal: 2.03
		- Overall: 1.00
	Cramped machinery, storage, compartmentation space
	Cramped accommodation and workspace room