USS Minnesota 1940 65k ton 30.5knot FBB

USS Minnesota, United States of America Battleship laid down 1940

Displacement:
	61,445 t light; 64,909 t standard; 70,668 t normal; 75,276 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(950.93 ft / 930.00 ft) x 120.00 ft x (37.00 / 38.98 ft)
	(289.84 m / 283.46 m) x 36.58 m  x (11.28 / 11.88 m)

Armament:
      9 - 18.00" / 457 mm 50.0 cal guns - 3,200.01lbs / 1,451.50kg shells, 100 per gun
	  Breech loading guns in turret on barbette mounts, 1940 Model
	  2 x 3-gun mounts on centreline, forward deck forward
		1 raised mount - superfiring
	  1 x 3-gun mount on centreline, aft deck aft
      20 - 5.00" / 127 mm 54.0 cal guns - 69.34lbs / 31.45kg shells, 400 per gun
	  Dual purpose guns in deck and hoist mounts, 1940 Model
	  10 x 2-gun mounts on sides, evenly spread
		4 raised mounts
      56 - 1.57" / 40.0 mm 56.0 cal guns - 2.05lbs / 0.93kg shells, 2,000 per gun
	  Anti-air guns in deck mounts, 1941 Model
	  14 x Quad mounts on sides, evenly spread
		6 raised mounts
      48 - 0.79" / 20.0 mm 70.0 cal guns - 0.27lbs / 0.12kg shells, 2,000 per gun
	  Anti-air guns in deck mounts, 1939 Model
	  24 x Twin mounts on sides, evenly spread
		12 raised mounts
      Weight of broadside 30,315 lbs / 13,751 kg

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	16.5" / 419 mm	567.30 ft / 172.91 m	16.00 ft / 4.88 m
	Ends:	Unarmoured
	  Main Belt covers 94 % of normal length
	  Main Belt inclined -19.00 degrees (positive = in)

   - Torpedo Bulkhead - Additional damage containing bulkheads:
		3.50" / 89 mm	567.30 ft / 172.91 m	35.00 ft / 10.67 m
	Beam between torpedo bulkheads 84.00 ft / 25.60 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	21.0" / 533 mm	8.00" / 203 mm		16.0" / 406 mm
	2nd:	4.00" / 102 mm	3.00" / 76 mm		2.50" / 64 mm
	3rd:	1.00" / 25 mm	      -			      -
	4th:	0.50" / 13 mm	      -			      -

   - Armoured deck - multiple decks:
	For and Aft decks: 8.50" / 216 mm
	Forecastle: 2.00" / 51 mm  Quarter deck: 2.00" / 51 mm

   - Conning towers: Forward 13.00" / 330 mm, Aft 0.00" / 0 mm

Machinery:
	Oil fired boilers, steam turbines,
	Geared drive, 4 shafts, 211,845 shp / 158,037 Kw = 30.50 kts
	Range 15,000nm at 15.00 kts
	Bunker at max displacement = 10,367 tons

Complement:
	2,166 - 2,817

Cost:
	£35.912 million / $143.646 million

Distribution of weights at normal displacement:
	Armament: 6,295 tons, 8.9 %
	   - Guns: 6,295 tons, 8.9 %
	Armour: 25,107 tons, 35.5 %
	   - Belts: 6,451 tons, 9.1 %
	   - Torpedo bulkhead: 2,571 tons, 3.6 %
	   - Armament: 4,877 tons, 6.9 %
	   - Armour Deck: 10,729 tons, 15.2 %
	   - Conning Tower: 479 tons, 0.7 %
	Machinery: 5,664 tons, 8.0 %
	Hull, fittings & equipment: 24,279 tons, 34.4 %
	Fuel, ammunition & stores: 9,223 tons, 13.1 %
	Miscellaneous weights: 100 tons, 0.1 %
	   - On freeboard deck: 100 tons

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  102,942 lbs / 46,693 Kg = 35.3 x 18.0 " / 457 mm shells or 17.4 torpedoes
	Stability (Unstable if below 1.00): 1.14
	Metacentric height 8.4 ft / 2.6 m
	Roll period: 17.4 seconds
	Steadiness	- As gun platform (Average = 50 %): 61 %
			- Recoil effect (Restricted arc if above 1.00): 0.70
	Seaboat quality  (Average = 1.00): 1.22

Hull form characteristics:
	Hull has a flush deck,
	  a straight bulbous bow and a round stern
	Block coefficient (normal/deep): 0.599 / 0.606
	Length to Beam Ratio: 7.75 : 1
	'Natural speed' for length: 30.50 kts
	Power going to wave formation at top speed: 49 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): 22.00 degrees
	Stern overhang: 8.00 ft / 2.44 m
	Freeboard (% = length of deck as a percentage of waterline length):
				Fore end,	 Aft end
	   - Forecastle:	19.50 %,  32.00 ft / 9.75 m,  24.00 ft / 7.32 m
	   - Forward deck:	36.00 %,  24.00 ft / 7.32 m,  24.00 ft / 7.32 m
	   - Aft deck:	25.00 %,  24.00 ft / 7.32 m,  24.00 ft / 7.32 m
	   - Quarter deck:	19.50 %,  24.00 ft / 7.32 m,  26.00 ft / 7.92 m
	   - Average freeboard:		24.82 ft / 7.56 m
	Ship tends to be wet forward

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 93.8 %
		- Above water (accommodation/working, high = better): 172.1 %
	Waterplane Area: 81,546 Square feet or 7,576 Square metres
	Displacement factor (Displacement / loading): 108 %
	Structure weight / hull surface area: 239 lbs/sq ft or 1,165 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.98
		- Longitudinal: 1.19
		- Overall: 1.00
	Adequate machinery, storage, compartmentation space
	Excellent accommodation and workspace room
	Good seaboat, rides out heavy weather easily