Effingham Class, British Cruiser laid down 1916
HMCS Effingham
HMCS Frobisher
HMCS Hawkins
HMCS Raleigh
HMCS Cavendish
Displacement:
9.370 t light; 9.750 t standard; 11.185 t normal; 12.289 t full load
Dimensions: Length overall / water x beam x draught
565,00 ft / 565,00 ft x 58,00 ft (Bulges 65,00 ft) x 20,50 ft (normal load)
172,21 m / 172,21 m x 17,68 m (Bulges 19,81 m) x 6,25 m
Armament:
5 - 7,50" / 191 mm guns in single mounts, 210,94lbs / 95,68kg shells, 1916 Model
Breech loading guns in deck mounts
on centreline ends, majority aft, 2 raised mounts - superfiring
2 - 7,50" / 191 mm guns in single mounts, 210,94lbs / 95,68kg shells, 1916 Model
Breech loading guns in deck mounts
on side, all amidships
8 - 4,00" / 102 mm guns in single mounts, 32,00lbs / 14,51kg shells, 1916 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
8 - 1,57" / 40,0 mm guns (2x4 guns), 1,95lbs / 0,88kg shells, 1916 Model
Breech loading guns in deck mounts
on side, evenly spread
4 - 0,79" / 20,0 mm guns in single mounts, 0,24lbs / 0,11kg shells, 1916 Model
Breech loading guns in deck mounts
on side, evenly spread
Weight of broadside 1.749 lbs / 793 kg
Shells per gun, main battery: 150
4 - 21,0" / 533,4 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3,00" / 76 mm 540,00 ft / 164,59 m 12,00 ft / 3,66 m
Ends: 2,50" / 64 mm 25,00 ft / 7,62 m 12,00 ft / 3,66 m
Upper: 1,00" / 25 mm 400,00 ft / 121,92 m 8,00 ft / 2,44 m
Main Belt covers 147 % of normal length
- Torpedo Bulkhead and Bulges:
1,50" / 38 mm 550,00 ft / 167,64 m 20,00 ft / 6,10 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3,00" / 76 mm - -
2nd: 3,00" / 76 mm - -
3rd: 1,00" / 25 mm - -
4th: 0,50" / 13 mm - -
- Armour deck: 2,00" / 51 mm, Conning tower: 3,00" / 76 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 73.250 shp / 54.644 Kw = 30,00 kts
Range 8.210nm at 15,00 kts (Bunkerage = 2.583 tons)
Complement:
543 - 706
Cost:
£1,462 million / $5,850 million
Distribution of weights at normal displacement:
Armament: 219 tons, 2,0 %
Armour: 2.462 tons, 22,0 %
- Belts: 921 tons, 8,2 %
- Torpedo bulkhead: 611 tons, 5,5 %
- Armament: 105 tons, 0,9 %
- Armour Deck: 794 tons, 7,1 %
- Conning Tower: 32 tons, 0,3 %
Machinery: 2.729 tons, 24,4 %
Hull, fittings & equipment: 3.810 tons, 34,1 %
Fuel, ammunition & stores: 1.815 tons, 16,2 %
Miscellaneous weights: 150 tons, 1,3 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
7.146 lbs / 3.241 Kg = 33,9 x 7,5 " / 191 mm shells or 1,2 torpedoes
Stability (Unstable if below 1.00): 1,43
Metacentric height 4,9 ft / 1,5 m
Steadiness - As gun platform (Average = 50 %): 78 %
- Recoil effect (Restricted arc if above 1.00): 0,20
Seaboat quality (Average = 1.00): 1,55
Hull form characteristics:
Hull has low quarterdeck
Block coefficient: 0,520
Length to Beam Ratio: 8,69 : 1
'Natural speed' for length: 23,77 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 0,00 degrees
Stern overhang: 0,00 ft / 0,00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 24,00 ft / 7,32 m
- Forecastle (40 %): 24,00 ft / 7,32 m
- Mid (50 %): 24,00 ft / 7,32 m
- Quarterdeck (25 %): 16,00 ft / 4,88 m (24,00 ft / 7,32 m before break)
- Stern: 16,00 ft / 4,88 m
- Average freeboard: 22,00 ft / 6,71 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 146,9 %
- Above water (accommodation/working, high = better): 165,4 %
Waterplane Area: 21.454 Square feet or 1.993 Square metres
Displacement factor (Displacement / loading): 114 %
Structure weight / hull surface area: 96 lbs/sq ft or 471 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,93
- Longitudinal: 1,85
- Overall: 1,00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather