Long planned medium weight class ships for the RCN, planned to bridge the gap between the RCN's comparitively light-weight and undergunned CLs and the two
Renowns. Mission roles are varied, depending on circumstances. Capable of independant operations, or operating with other elements of the fleet as needed. High speed requirement due to the seen need to avoid combat with heavier armed supercruisers and fast capital ships.
Ontario class, Canadian Frigate laid down 1937
HMCS
Ontario
HMCS
Quebec
HMCS
British Columbia
HMCS
Alberta
Displacement:
17,000 t light; 17,779 t standard; 19,355 t normal; 20,615 t full load
Dimensions: Length overall / water x beam x draught
713.04 ft / 705.00 ft x 70.00 ft x 24.00 ft (normal load)
217.33 m / 214.88 m x 21.34 m x 7.32 m
Armament:
9 - 9.20" / 234 mm guns (3x3 guns), 510.00lbs / 231.33kg shells, 1937 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
12 - 5.50" / 140 mm guns (6x2 guns), 83.19lbs / 37.73kg shells, 1940 Model
Automatic rapid fire guns in turrets (on barbettes)
on side, all amidships, 2 raised mounts - superfiring
32 - 1.57" / 40.0 mm guns (4x8 guns), 1.95lbs / 0.88kg shells, 1937 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
20 - 0.79" / 20.0 mm guns (10x2 guns), 0.24lbs / 0.11kg shells, 1937 Model
Machine guns in deck mounts
on side, evenly spread, 5 raised mounts
Weight of broadside 5,655 lbs / 2,565 kg
Shells per gun, main battery: 120
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 8.00" / 203 mm 425.00 ft / 129.54 m 10.00 ft / 3.05 m
Ends: Unarmoured
Main Belt covers 93 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 8.00" / 203 mm 5.00" / 127 mm 6.00" / 152 mm
2nd: 1.00" / 25 mm - 0.20" / 5 mm
- Armour deck: 3.00" / 76 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 144,360 shp / 107,693 Kw = 34.50 kts
Range 9,000nm at 15.00 kts
Bunker at max displacement = 2,836 tons
Complement:
819 - 1,066
Cost:
£9.032 million / $36.130 million
Distribution of weights at normal displacement:
Armament: 596 tons, 3.1 %
Armour: 4,379 tons, 22.6 %
- Belts: 1,435 tons, 7.4 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 912 tons, 4.7 %
- Armour Deck: 2,032 tons, 10.5 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 4,001 tons, 20.7 %
Hull, fittings & equipment: 7,899 tons, 40.8 %
Fuel, ammunition & stores: 2,355 tons, 12.2 %
Miscellaneous weights: 125 tons, 0.6 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
25,290 lbs / 11,471 Kg = 65.0 x 9.2 " / 234 mm shells or 2.2 torpedoes
Stability (Unstable if below 1.00): 1.11
Metacentric height 3.6 ft / 1.1 m
Roll period: 15.5 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.91
Seaboat quality (Average = 1.00): 1.01
Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.572
Length to Beam Ratio: 10.07 : 1
'Natural speed' for length: 30.06 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 30.00 ft / 9.14 m
- Forecastle (20 %): 27.00 ft / 8.23 m
- Mid (50 %): 27.00 ft / 8.23 m (20.00 ft / 6.10 m aft of break)
- Quarterdeck (25 %): 20.00 ft / 6.10 m
- Stern: 20.00 ft / 6.10 m
- Average freeboard: 23.74 ft / 7.24 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 91.9 %
- Above water (accommodation/working, high = better): 202.9 %
Waterplane Area: 36,620 Square feet or 3,402 Square metres
Displacement factor (Displacement / loading): 112 %
Structure weight / hull surface area: 139 lbs/sq ft or 677 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.38
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Improved light-weight Automated Dual-Purpose twin 5.5" guns simmed as 1940 Automatics.
60 tons - additional weight of DP mounts (10 tons per)