Replacement Ocean-Class Design Study [1926] (Mazantsi)

Replacement Ocean-Class, Mazantsi Dominion Design Study laid down 1926

Displacement:
	27,538 t light; 29,151 t standard; 30,931 t normal; 32,355 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(706.00 ft / 700.00 ft) x 90.00 ft x (32.00 / 33.10 ft)
	(215.19 m / 213.36 m) x 27.43 m  x (9.75 / 10.09 m)

Armament:
      6 - 16.25" / 413 mm 43.0 cal guns - 2,095.80lbs / 950.64kg shells, 100 per gun
	  Breech loading guns in turret on barbette mounts, 1915 Model
	  2 x Triple mounts on centreline, evenly spread
      16 - 5.50" / 140 mm 50.0 cal guns - 77.16lbs / 35.00kg shells, 400 per gun
	  Quick firing guns in deck mounts, 1924 Model
	  8 x Twin mounts on sides, evenly spread
      24 - 1.25" / 31.8 mm 58.0 cal guns - 1.06lbs / 0.48kg shells, 1,500 per gun
	  Anti-air guns in deck mounts, 1923 Model
	  12 x Twin mounts on sides, evenly spread
      Weight of broadside 13,835 lbs / 6,275 kg

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	8.00" / 203 mm	575.00 ft / 175.26 m	11.38 ft / 3.47 m
	Ends:	4.00" / 102 mm	125.00 ft / 38.10 m	11.38 ft / 3.47 m
	  Main Belt covers 126 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
		2.50" / 64 mm	575.00 ft / 175.26 m	29.37 ft / 8.95 m
	Beam between torpedo bulkheads 60.00 ft / 18.29 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	12.0" / 305 mm	8.00" / 203 mm		8.00" / 203 mm
	2nd:	2.50" / 64 mm	1.50" / 38 mm		      -
	3rd:	0.50" / 13 mm	      -			      -

   - Armoured deck - multiple decks:
	For and Aft decks: 4.00" / 102 mm
	Forecastle: 2.50" / 64 mm  Quarter deck: 2.50" / 64 mm

   - Conning towers: Forward 10.00" / 254 mm, Aft 0.00" / 0 mm

Machinery:
	Oil fired boilers, steam turbines,
	Geared drive, 4 shafts, 142,078 shp / 105,990 Kw = 32.00 kts
	Range 10,000nm at 12.00 kts
	Bunker at max displacement = 3,204 tons

Complement:
	1,166 - 1,516

Cost:
	£9.663 million / $38.651 million

Distribution of weights at normal displacement:
	Armament: 2,169 tons, 7.0 %
	   - Guns: 2,169 tons, 7.0 %
	Armour: 8,781 tons, 28.4 %
	   - Belts: 2,334 tons, 7.5 %
	   - Torpedo bulkhead: 1,562 tons, 5.1 %
	   - Armament: 1,536 tons, 5.0 %
	   - Armour Deck: 3,137 tons, 10.1 %
	   - Conning Tower: 212 tons, 0.7 %
	Machinery: 4,548 tons, 14.7 %
	Hull, fittings & equipment: 11,790 tons, 38.1 %
	Fuel, ammunition & stores: 3,393 tons, 11.0 %
	Miscellaneous weights: 250 tons, 0.8 %
	   - Hull below water: 100 tons
	   - On freeboard deck: 50 tons
	   - Above deck: 100 tons

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  40,364 lbs / 18,309 Kg = 18.8 x 16.3 " / 413 mm shells or 5.7 torpedoes
	Stability (Unstable if below 1.00): 1.17
	Metacentric height 5.7 ft / 1.7 m
	Roll period: 15.8 seconds
	Steadiness	- As gun platform (Average = 50 %): 54 %
			- Recoil effect (Restricted arc if above 1.00): 0.80
	Seaboat quality  (Average = 1.00): 1.08

Hull form characteristics:
	Hull has a flush deck,
	  an extended bulbous bow and large transom stern
	Block coefficient (normal/deep): 0.537 / 0.543
	Length to Beam Ratio: 7.78 : 1
	'Natural speed' for length: 30.68 kts
	Power going to wave formation at top speed: 57 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): 5.00 degrees
	Stern overhang: 0.00 ft / 0.00 m
	Freeboard (% = length of deck as a percentage of waterline length):
				Fore end,	 Aft end
	   - Forecastle:	20.00 %,  32.00 ft / 9.75 m,  28.00 ft / 8.53 m
	   - Forward deck:	30.00 %,  28.00 ft / 8.53 m,  24.00 ft / 7.32 m
	   - Aft deck:	35.00 %,  24.00 ft / 7.32 m,  24.00 ft / 7.32 m
	   - Quarter deck:	15.00 %,  24.00 ft / 7.32 m,  24.00 ft / 7.32 m
	   - Average freeboard:		25.72 ft / 7.84 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 126.3 %
		- Above water (accommodation/working, high = better): 184.1 %
	Waterplane Area: 45,207 Square feet or 4,200 Square metres
	Displacement factor (Displacement / loading): 105 %
	Structure weight / hull surface area: 183 lbs/sq ft or 895 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.93
		- Longitudinal: 1.89
		- Overall: 1.00
	Cramped machinery, storage, compartmentation space
	Excellent accommodation and workspace room