Black Prince, Great Britain Armoured Cruiser laid down 1884
Displacement:
7,627 t light; 7,927 t standard; 9,800 t normal; 11,299 t full load
Dimensions: Length overall / water x beam x draught
400.00 ft / 400.00 ft x 58.00 ft x 27.00 ft (normal load)
121.92 m / 121.92 m x 17.68 m x 8.23 m
Armament:
4 - 8.00" / 203 mm guns in single mounts, 232.96lbs / 105.67kg shells, 1884 Model
Breech loading guns in turrets (on barbettes)
on centreline, all forward
10 - 6.00" / 152 mm guns in single mounts, 98.28lbs / 44.58kg shells, 1884 Model
Breech loading guns in casemate mounts
on side, all aft
Weight of broadside 1,915 lbs / 868 kg
Shells per gun, main battery: 90
6 - 17.7" / 450 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.50" / 114 mm 250.00 ft / 76.20 m 16.00 ft / 4.88 m
Ends: Unarmoured
Main Belt covers 96 % of normal length
Main belt does not fully cover magazines and engineering spaces
- Torpedo Bulkhead:
1.00" / 25 mm 250.00 ft / 76.20 m 27.00 ft / 8.23 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 4.50" / 114 mm 4.00" / 102 mm 4.50" / 114 mm
2nd: 4.00" / 102 mm 4.00" / 102 mm 4.00" / 102 mm
- Armour deck: 4.00" / 102 mm, Conning tower: 4.50" / 114 mm
Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 2 shafts, 8,145 ihp / 6,076 Kw = 16.50 kts
Range 6,500nm at 12.00 kts
Bunker at max displacement = 3,372 tons (100% coal)
Complement:
492 - 640
Cost:
£0.692 million / $2.768 million
Distribution of weights at normal displacement:
Armament: 239 tons, 2.4 %
Armour: 2,686 tons, 27.4 %
- Belts: 785 tons, 8.0 %
- Torpedo bulkhead: 250 tons, 2.5 %
- Armament: 411 tons, 4.2 %
- Armour Deck: 1,195 tons, 12.2 %
- Conning Tower: 44 tons, 0.5 %
Machinery: 1,601 tons, 16.3 %
Hull, fittings & equipment: 3,101 tons, 31.6 %
Fuel, ammunition & stores: 2,173 tons, 22.2 %
Miscellaneous weights: 0 tons, 0.0 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
12,583 lbs / 5,708 Kg = 54.0 x 8.0 " / 203 mm shells or 2.2 torpedoes
Stability (Unstable if below 1.00): 1.15
Metacentric height 2.9 ft / 0.9 m
Roll period: 14.4 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
- Recoil effect (Restricted arc if above 1.00): 0.57
Seaboat quality (Average = 1.00): 2.00
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.548
Length to Beam Ratio: 6.90 : 1
'Natural speed' for length: 20.00 kts
Power going to wave formation at top speed: 39 %
Trim (Max stability = 0, Max steadiness = 100): 59
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: -2.00 ft / -0.61 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22.00 ft / 6.71 m
- Forecastle (20 %): 19.00 ft / 5.79 m
- Mid (50 %): 19.00 ft / 5.79 m
- Quarterdeck (15 %): 19.00 ft / 5.79 m
- Stern: 19.00 ft / 5.79 m
- Average freeboard: 19.24 ft / 5.86 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 109.9 %
- Above water (accommodation/working, high = better): 103.8 %
Waterplane Area: 16,154 Square feet or 1,501 Square metres
Displacement factor (Displacement / loading): 126 %
Structure weight / hull surface area: 111 lbs/sq ft or 542 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.90
- Longitudinal: 2.76
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather
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Friday, January 05, 2007
A change of pace: the Black Prince (GB/CA/1884)
Some work that I had done a long time ago surfaced in the last few days. One of the designs is a ship named Black Prince, which I am calling the GB/CA/1884. This ship has 4-8in and 10-6in guns, all breachloaders. The armour basis is 4.5in. The maximum speed is 16.5 knots. The range is 6,500nm at 12 knots. This is the Springsharp report:
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