HMCS Bonaventure, Canada Cruiser laid down 1927

HMCS Bonaventure, Canada Cruiser laid down 1927

Displacement:
	9 474 t light; 9 996 t standard; 11 727 t normal; 13 112 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(618.66 ft / 616.80 ft) x 59.71 ft x (21.98 / 23.94 ft)
	(188.57 m / 188.00 m) x 18.20 m  x (6.70 / 7.30 m)

Armament:
      8 - 7.99" / 203 mm 50.0 cal guns - 255.96lbs / 116.10kg shells, 180 per gun
	  Breech loading guns in deck and hoist mounts, 1923 Model
	  4 x Twin mounts on centreline, evenly spread
		2 raised mounts
      8 - 4.02" / 102 mm 45.0 cal guns - 31.00lbs / 14.06kg shells, 450 per gun
	  Quick firing guns in deck mounts, 1913 Model
	  8 x Single mounts on sides, evenly spread
      16 - 1.57" / 40.0 mm 45.0 cal guns - 1.97lbs / 0.89kg shells, 1 200 per gun
	  Anti-air guns in deck mounts, 1927 Model
	  2 x 2 row octuple mounts on centreline, evenly spread
      Weight of broadside 2 327 lbs / 1 056 kg
      Main Torpedoes
      6 - 21.0" / 533 mm, 23.25 ft / 7.09 m torpedoes - 1.521 t each, 9.125 t total
	In 2 sets of deck mounted side rotating tubes

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	3.94" / 100 mm	524.93 ft / 160.00 m	11.15 ft / 3.40 m
	Ends:	Unarmoured
	  Main Belt covers 131 % of normal length
	  Main Belt inclined -10.00 degrees (positive = in)

   - Torpedo Bulkhead - Strengthened structural bulkheads:
		1.97" / 50 mm	524.93 ft / 160.00 m	18.37 ft / 5.60 m
	Beam between torpedo bulkheads 45.93 ft / 14.00 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	3.94" / 100 mm	1.77" / 45 mm		3.94" / 100 mm

   - Armoured deck - single deck:
	For and Aft decks: 1.97" / 50 mm

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

Machinery:
	Oil fired boilers, steam turbines,
	Geared drive, 4 shafts, 91 431 shp / 68 208 Kw = 32.00 kts
	Range 12 000nm at 15.00 kts
	Bunker at max displacement = 3 116 tons

Complement:
	563 - 732

Cost:
	£3.547 million / $14.189 million

Distribution of weights at normal displacement:
	Armament: 576 tons, 4.9 %
	   - Guns: 558 tons, 4.8 %
	   - Weapons: 18 tons, 0.2 %
	Armour: 2 594 tons, 22.1 %
	   - Belts: 905 tons, 7.7 %
	   - Torpedo bulkhead: 702 tons, 6.0 %
	   - Armament: 92 tons, 0.8 %
	   - Armour Deck: 851 tons, 7.3 %
	   - Conning Tower: 44 tons, 0.4 %
	Machinery: 2 886 tons, 24.6 %
	Hull, fittings & equipment: 3 273 tons, 27.9 %
	Fuel, ammunition & stores: 2 253 tons, 19.2 %
	Miscellaneous weights: 145 tons, 1.2 %
	   - On freeboard deck: 120 tons
	   - Above deck: 25 tons

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  13 751 lbs / 6 237 Kg = 53.9 x 8.0 " / 203 mm shells or 1.8 torpedoes
	Stability (Unstable if below 1.00): 1.27
	Metacentric height 3.5 ft / 1.1 m
	Roll period: 13.3 seconds
	Steadiness	- As gun platform (Average = 50 %): 53 %
			- Recoil effect (Restricted arc if above 1.00): 0.51
	Seaboat quality  (Average = 1.00): 1.06

Hull form characteristics:
	Hull has a flush deck,
	  a normal bow and a cruiser stern
	Block coefficient (normal/deep): 0.507 / 0.520
	Length to Beam Ratio: 10.33 : 1
	'Natural speed' for length: 24.84 kts
	Power going to wave formation at top speed: 55 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): 5.00 degrees
	Stern overhang: -6.56 ft / -2.00 m
	Freeboard (% = length of deck as a percentage of waterline length):
				Fore end,	 Aft end
	   - Forecastle:	12.00 %,  21.33 ft / 6.50 m,  18.04 ft / 5.50 m
	   - Forward deck:	40.00 %,  18.04 ft / 5.50 m,  18.04 ft / 5.50 m
	   - Aft deck:	43.00 %,  18.04 ft / 5.50 m,  18.04 ft / 5.50 m
	   - Quarter deck:	5.00 %,  18.04 ft / 5.50 m,  18.04 ft / 5.50 m
	   - Average freeboard:		18.20 ft / 5.55 m
	Ship tends to be wet forward

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 129.8 %
		- Above water (accommodation/working, high = better): 147.5 %
	Waterplane Area: 24 696 Square feet or 2 294 Square metres
	Displacement factor (Displacement / loading): 109 %
	Structure weight / hull surface area: 107 lbs/sq ft or 523 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.98
		- Longitudinal: 1.19
		- Overall: 1.00
	Cramped machinery, storage, compartmentation space
	Excellent accommodation and workspace room

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Notes:

Armament

	Main Battery
		8x 8-in Mark VIII
		In 4x Mark I* twin mounts
		http://www.navweaps.com/Weapons/WNBR_8-50_mk8.php
		(116.1 kg, 180 round magazine, 3-6 rpm, 28,030m range, 500 round life)

	Heavy AA Battery
		8x 4-in Mark V
		In 8x HA Mark III* single mounts
		http://www.navweaps.com/Weapons/WNBR_4-45_mk5.php
		(14.06 kg, 450 round magazine, 10-15 rpm, 15,020m range, 9,450m AA ceiling, 850 round life)

	Light AA Battery
		16x 2-pdr QF Mark VIII
		In 2x Mark M octuple mounts
		http://www.navweaps.com/Weapons/WNBR_2pounder_m8.php
		(0.91 kg, 1,200 round magazine, 96-98 rpm, 1,100m range, 5,000 round life)

	Torpedoes
		6x 21" Mark V
		In 2x triple side rotating deck mounts
		http://www.navweaps.com/Weapons/WTBR_PreWWII.php#21%22_%2853.3_cm%29_Mark_V
		(7.086m long, 234kg TNT, 4570m@40kts, 12340m@25kts)

Armour

	Declined belt is external

Misc

	25t Crane
	20t Gunpowder Catapult
	2x 20t Floatplanes (Armstrong Whitworth Atlas Mark I)
	2x 30t Hangars

Maneuverability

	Ship designed to protected Canada's large trade routes from its large coastline.

	Favour given to speed, seakeeping 1.21 (Good seaboat) at 30 knots.

	32 knots considered minimum for the Trade Protection role by the British Admiralty.