1928 MN Dunkerque

crruising, frrance crruiser laid down 1928

Displacement:
	27,679 t light; 29,160 t standard; 33,857 t normal; 37,615 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(752.69 ft / 737.63 ft) x 98.43 ft x (30.28 / 32.80 ft)
	(229.42 m / 224.83 m) x 30.00 m  x (9.23 / 10.00 m)

Armament:
      6 - 15.98" / 406 mm 45.0 cal guns - 2,369.97lbs / 1,075.00kg shells, 80 per gun
	  Breech loading guns in turret on barbette mounts, 1928 Model
	  3 x Twin mounts on centreline, forward evenly spread
      8 - 5.46" / 139 mm 40.0 cal guns - 88.63lbs / 40.20kg shells, 200 per gun
	  Breech loading guns in deck and hoist mounts, 1927 Model
	  2 x Quad mounts on centreline, evenly spread
		2 raised mounts
      16 - 3.54" / 90.0 mm 50.0 cal guns - 20.97lbs / 9.51kg shells, 500 per gun
	  Anti-air guns in deck and hoist mounts, 1926 Model
	  12 x Single mounts on sides, evenly spread
		4 raised mounts
	  2 x Twin mounts on centreline, forward evenly spread
		2 double raised mounts
      Weight of broadside 15,264 lbs / 6,924 kg

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	10.8" / 275 mm	516.34 ft / 157.38 m	13.47 ft / 4.11 m
	Ends:	Unarmoured
	  Main Belt covers 108 % of normal length
	  Main Belt inclined -13.00 degrees (positive = in)

   - Torpedo Bulkhead - Additional damage containing bulkheads:
		1.18" / 30 mm	524.93 ft / 160.00 m	26.25 ft / 8.00 m
	Beam between torpedo bulkheads 52.49 ft / 16.00 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	15.7" / 400 mm	8.27" / 210 mm		8.66" / 220 mm
	2nd:	7.87" / 200 mm	3.54" / 90 mm		5.91" / 150 mm
	3rd:	0.98" / 25 mm	0.24" / 6 mm		0.98" / 25 mm

   - Armoured deck - multiple decks:
	For and Aft decks: 5.91" / 150 mm
	Forecastle: 0.98" / 25 mm  Quarter deck: 0.98" / 25 mm

   - Conning towers: Forward 11.81" / 300 mm, Aft 0.00" / 0 mm

Machinery:
	Oil fired boilers, steam turbines,
	Geared drive, 4 shafts, 77,957 shp / 58,156 Kw = 27.00 kts
	Range 11,000nm at 18.00 kts
	Bunker at max displacement = 8,455 tons

Complement:
	1,247 - 1,622

Cost:
	£9.751 million / $39.002 million

Distribution of weights at normal displacement:
	Armament: 2,238 tons, 6.6 %
	   - Guns: 2,238 tons, 6.6 %
	Armour: 10,687 tons, 31.6 %
	   - Belts: 3,164 tons, 9.3 %
	   - Torpedo bulkhead: 602 tons, 1.8 %
	   - Armament: 1,605 tons, 4.7 %
	   - Armour Deck: 5,048 tons, 14.9 %
	   - Conning Tower: 266 tons, 0.8 %
	Machinery: 2,427 tons, 7.2 %
	Hull, fittings & equipment: 12,058 tons, 35.6 %
	Fuel, ammunition & stores: 6,178 tons, 18.2 %
	Miscellaneous weights: 270 tons, 0.8 %
	   - On freeboard deck: 180 tons
	   - Above deck: 90 tons

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  59,890 lbs / 27,165 Kg = 29.3 x 16.0 " / 406 mm shells or 9.7 torpedoes
	Stability (Unstable if below 1.00): 1.28
	Metacentric height 7.7 ft / 2.3 m
	Roll period: 14.9 seconds
	Steadiness	- As gun platform (Average = 50 %): 63 %
			- Recoil effect (Restricted arc if above 1.00): 0.49
	Seaboat quality  (Average = 1.00): 1.25

Hull form characteristics:
	Hull has a flush deck,
	  a normal bow and large transom stern
	Block coefficient (normal/deep): 0.539 / 0.553
	Length to Beam Ratio: 7.49 : 1
	'Natural speed' for length: 31.59 kts
	Power going to wave formation at top speed: 47 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): 30.00 degrees
	Stern overhang: 0.85 ft / 0.26 m
	Freeboard (% = length of deck as a percentage of waterline length):
				Fore end,	 Aft end
	   - Forecastle:	20.00 %,  24.61 ft / 7.50 m,  18.04 ft / 5.50 m
	   - Forward deck:	60.00 %,  18.04 ft / 5.50 m,  18.04 ft / 5.50 m
	   - Aft deck:	10.00 %,  18.04 ft / 5.50 m,  18.04 ft / 5.50 m
	   - Quarter deck:	10.00 %,  18.04 ft / 5.50 m,  18.04 ft / 5.50 m
	   - Average freeboard:		18.57 ft / 5.66 m
	Ship tends to be wet forward

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 107.5 %
		- Above water (accommodation/working, high = better): 143.9 %
	Waterplane Area: 52,197 Square feet or 4,849 Square metres
	Displacement factor (Displacement / loading): 122 %
	Structure weight / hull surface area: 183 lbs/sq ft or 894 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.98
		- Longitudinal: 1.21
		- Overall: 1.00
	Adequate machinery, storage, compartmentation space
	Excellent accommodation and workspace room
	Good seaboat, rides out heavy weather easily


138.6mm/40 Model 1927 - 12rpm , 40.2kg, 16600m@28deg
90mm/50 Model 1926 - 15rpm, 9.51kg, 15440@45 deg, AA10600@80deg

AA requirement: combined 150rpm on the broadside, vs Dunkerque (1932) 204rpm

Misc weight above deck:
(50t) 2 heavy cranes
(40t) 2 catapults, gunpowder
On deck:
(80t) 4 floatplanes
(60t) 2 hangars
(40t) Extra tonnage allowance for AA machineguns/autocannons or other topside gear

average +25mm (eff.50mm) bomb deck at freeboard deck, ship extents
125mm main armoured deck, citadel

+5.5m freeboard deck
+2.5m armoured deck
+0.75m deep draught waterline
+0.5m splinter deck
-0.5m lowest extent of 300mm belt
-1.5m belt tapers to 100mm and ends, joined to splinter deck slope
absolute belt height 4m, lowest quarter tapers to 100mm, total average 275mm

Barbette armour does not extend below armoured deck, so effective thickness is 400mm