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- CRNS Silvia, Calder Heavy Cruiser laid down 1934
- Displacement:
- 9,734 t light; 10,179 t standard; 11,421 t normal; 12,414 t full load
- Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
- (633.27 ft / 621.06 ft) x 61.02 ft x (18.70 / 19.95 ft)
- (193.02 m / 189.30 m) x 18.60 m x (5.70 / 6.08 m)
- Armament:
- 6 - 8.07" / 205 mm 50.0 cal guns - 278.28lbs / 126.22kg shells, 100 per gun
- Breech loading guns in turret on barbette mounts, 1934 Model
- 3 x 2 row twin mounts on centreline ends, majority forward
- 2 raised mounts - superfiring
- 10 - 5.12" / 130 mm 40.0 cal guns - 70.55lbs / 32.00kg shells, 300 per gun
- Breech loading guns in deck and hoist mounts, 1934 Model
- 4 x 2-gun mounts on sides, evenly spread
- 1 x 2 row twin mount on centreline forward
- 1 double raised mount
- 12 - 1.46" / 37.0 mm 60.0 cal guns - 1.70lbs / 0.77kg shells, 600 per gun
- Anti-air guns in deck mounts, 1934 Model
- 6 x Single mounts on sides, evenly spread
- Weight of broadside 2,396 lbs / 1,087 kg
- Armour:
- - Belts: Width (max) Length (avg) Height (avg)
- Main: 3.35" / 85 mm 424.90 ft / 129.51 m 9.38 ft / 2.86 m
- Ends: 1.02" / 26 mm 196.16 ft / 59.79 m 9.38 ft / 2.86 m
- Main Belt covers 105 % of normal length
- Main belt does not fully cover magazines and engineering spaces
- - Torpedo Bulkhead - Additional damage containing bulkheads:
- 2.01" / 51 mm 391.27 ft / 119.26 m 17.36 ft / 5.29 m
- Beam between torpedo bulkheads 54.46 ft / 16.60 m
- - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
- Main: 2.05" / 52 mm 2.05" / 52 mm 2.05" / 52 mm
- 2nd: 0.98" / 25 mm 0.98" / 25 mm -
- - Armoured deck - multiple decks:
- For and Aft decks: 1.46" / 37 mm
- - Conning towers: Forward 4.53" / 115 mm, Aft 0.00" / 0 mm
- Machinery:
- Oil fired boilers, steam turbines,
- Geared drive, 4 shafts, 91,588 shp / 68,325 Kw = 33.00 kts
- Range 10,000nm at 14.00 kts
- Bunker at max displacement = 2,235 tons
- Complement:
- 552 - 718
- Cost:
- £4.613 million / $18.451 million
- Distribution of weights at normal displacement:
- Armament: 681 tons, 6.0 %
- - Guns: 681 tons, 6.0 %
- Armour: 1,995 tons, 17.5 %
- - Belts: 616 tons, 5.4 %
- - Torpedo bulkhead: 504 tons, 4.4 %
- - Armament: 220 tons, 1.9 %
- - Armour Deck: 605 tons, 5.3 %
- - Conning Tower: 49 tons, 0.4 %
- Machinery: 2,635 tons, 23.1 %
- Hull, fittings & equipment: 4,423 tons, 38.7 %
- Fuel, ammunition & stores: 1,687 tons, 14.8 %
- Miscellaneous weights: 0 tons, 0.0 %
- Overall survivability and seakeeping ability:
- Survivability (Non-critical penetrating hits needed to sink ship):
- 15,973 lbs / 7,245 Kg = 60.8 x 8.1 " / 205 mm shells or 2.3 torpedoes
- Stability (Unstable if below 1.00): 1.14
- Metacentric height 3.0 ft / 0.9 m
- Roll period: 14.7 seconds
- Steadiness - As gun platform (Average = 50 %): 54 %
- - Recoil effect (Restricted arc if above 1.00): 0.68
- Seaboat quality (Average = 1.00): 1.07
- Hull form characteristics:
- Hull has a flush deck,
- a straight bulbous bow and large transom stern
- Block coefficient (normal/deep): 0.564 / 0.575
- Length to Beam Ratio: 10.18 : 1
- 'Natural speed' for length: 28.21 kts
- Power going to wave formation at top speed: 58 %
- Trim (Max stability = 0, Max steadiness = 100): 50
- Bow angle (Positive = bow angles forward): 20.00 degrees
- Stern overhang: 2.30 ft / 0.70 m
- Freeboard (% = length of deck as a percentage of waterline length):
- Fore end, Aft end
- - Forecastle: 21.00 %, 27.23 ft / 8.30 m, 21.00 ft / 6.40 m
- - Forward deck: 19.00 %, 21.00 ft / 6.40 m, 21.00 ft / 6.40 m
- - Aft deck: 44.00 %, 21.00 ft / 6.40 m, 21.00 ft / 6.40 m
- - Quarter deck: 16.00 %, 21.00 ft / 6.40 m, 21.00 ft / 6.40 m
- - Average freeboard: 21.52 ft / 6.56 m
- Ship tends to be wet forward
- Ship space, strength and comments:
- Space - Hull below water (magazines/engines, low = better): 105.4 %
- - Above water (accommodation/working, high = better): 202.2 %
- Waterplane Area: 27,909 Square feet or 2,593 Square metres
- Displacement factor (Displacement / loading): 121 %
- Structure weight / hull surface area: 111 lbs/sq ft or 543 Kg/sq metre
- Hull strength (Relative):
- - Cross-sectional: 0.97
- - Longitudinal: 1.40
- - Overall: 1.00
- Adequate machinery, storage, compartmentation space
- Excellent accommodation and workspace room
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