HMCS Laurier, Canadian Battleship laid down 1936 (Engine 1937)
Displacement:
44,110 t light; 47,523 t standard; 52,250 t normal; 56,032 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(759.15 ft / 725.75 ft) x 107.50 ft x (36.75 / 38.90 ft)
(231.39 m / 221.21 m) x 32.77 m x (11.20 / 11.86 m)
Armament:
18 - 12.00" / 305 mm 45.0 cal guns - 1,140.01lbs / 517.10kg shells, 120 per gun
Breech loading guns in turret on barbette mounts, 1937 Model
4 x 3-gun mounts on centreline ends, evenly spread
2 raised mounts - superfiring
2 x 3-gun mounts on centreline, forward deck aft
1 raised mount - superfiring
8 - 8.00" / 203 mm 55.0 cal guns - 335.00lbs / 151.95kg shells, 240 per gun
Auto rapid fire guns in turret on barbette mounts, 1940 Model
2 x 4-gun mounts on centreline ends, evenly spread
2 raised mounts
20 - 5.25" / 133 mm 50.0 cal guns - 80.00lbs / 36.29kg shells, 425 per gun
Dual purpose guns in deck and hoist mounts, 1936 Model
10 x 2-gun mounts on side ends, majority aft
2 raised mounts - superfiring
60 - 1.57" / 40.0 mm 70.0 cal guns - 2.25lbs / 1.02kg shells, 3,000 per gun
Anti-air guns in deck mounts, 1936 Model
8 x Quad mounts on centreline, evenly spread
2 raised mounts
14 x Twin mounts on sides, evenly spread
14 raised mounts
24 - 0.50" / 12.7 mm 85.0 cal guns - 0.10lbs / 0.05kg shells, 30,000 per gun
Anti-air guns in deck mounts, 1940 Model
12 x Twin mounts on centreline, evenly spread
12 raised mounts
Weight of broadside 24,938 lbs / 11,311 kg
Main Torpedoes
10 - 21.0" / 533 mm, 24.00 ft / 7.32 m torpedoes - 1.603 t each, 16.035 t total
In 2 sets of deck mounted side rotating tubes
2nd Torpedoes
20 - 21.0" / 533 mm, 24.00 ft / 7.32 m torpedoes - 1.603 t each, 32.069 t total
below water reloads
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 7.50" / 191 mm 560.00 ft / 170.69 m 18.50 ft / 5.64 m
Ends: 2.00" / 51 mm 165.75 ft / 50.52 m 18.50 ft / 5.64 m
Upper: 2.00" / 51 mm 560.00 ft / 170.69 m 9.00 ft / 2.74 m
Main Belt covers 119 % of normal length
Main Belt inclined 16.00 degrees (positive = in)
- Torpedo Bulkhead - Additional damage containing bulkheads:
3.75" / 95 mm 560.00 ft / 170.69 m 34.83 ft / 10.62 m
Beam between torpedo bulkheads 101.25 ft / 30.86 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 12.8" / 324 mm 5.25" / 133 mm 11.0" / 279 mm
2nd: 8.00" / 203 mm 3.00" / 76 mm 5.50" / 140 mm
3rd: 1.00" / 25 mm 1.00" / 25 mm 1.25" / 32 mm
4th: 0.75" / 19 mm 0.25" / 6 mm -
- Armoured deck - multiple decks:
For and Aft decks: 6.50" / 165 mm
Forecastle: 3.00" / 76 mm Quarter deck: 3.00" / 76 mm
- Conning towers: Forward 6.00" / 152 mm, Aft 6.00" / 152 mm
Machinery:
Diesel Internal combustion motors,
Geared drive, 4 shafts, 160,000 shp / 119,360 Kw = 30.07 kts
Range 11,300nm at 16.09 kts
Bunker at max displacement = 8,509 tons
Complement:
1,727 - 2,246
Cost:
£21.395 million / $85.578 million
Distribution of weights at normal displacement:
Armament: 5,052 tons, 9.7 %
- Guns: 4,980 tons, 9.5 %
- Weapons: 72 tons, 0.1 %
Armour: 18,369 tons, 35.2 %
- Belts: 3,932 tons, 7.5 %
- Torpedo bulkhead: 2,706 tons, 5.2 %
- Armament: 4,439 tons, 8.5 %
- Armour Deck: 6,930 tons, 13.3 %
- Conning Towers: 361 tons, 0.7 %
Machinery: 4,435 tons, 8.5 %
Hull, fittings & equipment: 15,955 tons, 30.5 %
Fuel, ammunition & stores: 8,140 tons, 15.6 %
Miscellaneous weights: 300 tons, 0.6 %
- Hull above water: 100 tons
- On freeboard deck: 125 tons
- Above deck: 75 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
80,654 lbs / 36,584 Kg = 93.3 x 12.0 " / 305 mm shells or 11.6 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 6.7 ft / 2.0 m
Roll period: 17.4 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.94
Seaboat quality (Average = 1.00): 1.01
Hull form characteristics:
Hull has raised forecastle, low quarterdeck ,
an extended bulbous bow and large transom stern
Block coefficient (normal/deep): 0.638 / 0.646
Length to Beam Ratio: 6.75 : 1
'Natural speed' for length: 31.28 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 32.00 degrees
Stern overhang: 12.00 ft / 3.66 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 12.00 %, 34.25 ft / 10.44 m, 30.75 ft / 9.37 m
- Forward deck: 42.00 %, 26.25 ft / 8.00 m, 26.25 ft / 8.00 m
- Aft deck: 32.00 %, 26.25 ft / 8.00 m, 26.25 ft / 8.00 m
- Quarter deck: 14.00 %, 19.00 ft / 5.79 m, 19.00 ft / 5.79 m
- Average freeboard: 25.94 ft / 7.91 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 67.7 %
- Above water (accommodation/working, high = better): 176.5 %
Waterplane Area: 61,645 Square feet or 5,727 Square metres
Displacement factor (Displacement / loading): 115 %
Structure weight / hull surface area: 215 lbs/sq ft or 1,051 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 1.83
- Overall: 1.00
Excellent machinery, storage, compartmentation space
Excellent accommodation and workspace room
HMAS Brisbane
Following the Imperial Conference of 1934, and resulting general adoption of the Statute of Westminster that year, the tonnage of the Dominion navies no longer counted toward the RN's Treaty limits. In 1935, 2 Hawkins Class cruisers were taken into hand for conversion to aircraft carriers. The conversion was more thorough than that of the Vindictive, leading to the removal of all her main guns, turrets etc and giving a total of of 20 aircraft in hangar, although the Australians used extensive deck parking, meaning that she rarely went to sea with less than 28 planes. These carriers were commissioned in the RAN as HMAS Brisbane and HMAS Darwin
Brisbane herself provided crucial air cover that led to the capture of Kastellorizo in Operation Abstention. She also proved instrumental in the sinking of the Italian Battleship Vittorio Veneto a month later with her Swordfish and Albacores from HMS Illustrious executing a coordinated "Hammer and Anvil" strike.
In order to stay within the peacetime requirement of 135,000t of non-experimental Aircraft Carriers, the Admiralty decided to build a class of six with no armour. The plan being to weight them down with armour and ballast later to make a much larger displacement vessel.
As their draft increased, so did their cross-sectional strength. A four inch armour plate on the floor of the hanger and over the props and drive shafts protected them from air attack. While the filling of half the below waterline 'sandwich' compartments either side added ballast and anti-torpedo protection.
Pretty much six Essex class within naval treaty limits. Glorious class held in reserve (naughty!) and worked up in 1939. All other carriers replaced by this class. Refit of Glorious class while in reserve aimed for this standard. Further six laid down while initial batch of Earl class were refitting out in 1939.
By 1941 Britain has 15x 35,000t Fleet Carriers.
Turning the Hawkins into CVLs in the late 30s is one of my guilty pleasures
I've started an out line of a story where the CVL HMS Hawkins finds herself operating in concert with force G in the South Atlantic and is involved in hunting down several raiders and her Aircraft take part in the locating then sinking of the Graf Spee off the African Coast during "The Battle of Walvis Ridge" on the 3rd December 1939 and also supporting Allied Landings in Italian East Africa during 1940.
So sort of operating on the fringes but decisively so.
Your post has given me an idea where she becomes HMAS Brisbane in order for the RAN to work up carrier ability.
So Force G comprises HMS Exeter, HMS Cumberland, HMS Ajax and HMNZS Achilles as well as HMAS Brisbane
This would, of course, have violated the Treaty. It was specifically put together to prevent this sort of trick. While that never stopped the Japanese from playing games, the RN was fairly rigorous in compliance. This was less out a sense of propiety and more out of a desire to keep costs down.
How did they keep the Glorious class at all? You had to send a ship to the breakers as soon as a replacement was complete. Once again, more than any other power, it was in the UK's favor to keep the Treaty alive as long as possible.
Turning the Hawkins into CVLs in the late 30s is one of my guilty pleasures
I've started an out line of a story where the CVL HMS Hawkins finds herself operating in concert with force G in the South Atlantic and is involved in hunting down several raiders and her Aircraft take part in the locating then sinking of the Graf Spee off the African Coast during "The Battle of Walvis Ridge" on the 3rd December 1939 and also supporting Allied Landings in Italian East Africa during 1940.
So sort of operating on the fringes but decisively so.
Your post has given me an idea where she becomes HMAS Brisbane in order for the RAN to work up carrier ability.
So Force G comprises HMS Exeter, HMS Cumberland, HMS Ajax and HMNZS Achilles as well as HMAS Brisbane
The Tarrantry stuff is very well written but its hard to find the information and stories i've found. And of course anyone here should avoid the political part of that forum...the Rabid Right Wing is strong there.
Ooh can I include this in my TL when I get round to writing it? Although in my TL Force G is more likely to be supported by HMAS Darwin, and Exeter (these have been transferred to Canada) and will be replaced by the Benbow or one of her sister ships, probably the Boscawen, from which Commodore Harwood fley his flag.