Vasco da Gama, portugal battleship laid down 1911 (Engine 1913)
Displacement:
12 578 t light; 13 336 t standard; 14 508 t normal; 15 446 t full load
Dimensions: Length overall / water x beam x draught
453,74 ft / 453,74 ft x 77,99 ft x 25,00 ft (normal load)
138,30 m / 138,30 m x 23,77 m x 7,62 m
Armament:
4 - 14,02" / 356 mm guns (2x2 guns), 1 376,64lbs / 624,43kg shells, 1910 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
12 - 5,98" / 152 mm guns in single mounts, 107,15lbs / 48,60kg shells, 1910 Model
Quick firing guns in casemate mounts
on side, all amidships
Weight of broadside 6 792 lbs / 3 081 kg
Shells per gun, main battery: 120
4 - 21,0" / 533 mm submerged torpedo tubes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 9,02" / 229 mm 261,98 ft / 79,85 m 8,33 ft / 2,54 m
Ends: 5,98" / 152 mm 191,77 ft / 58,45 m 8,33 ft / 2,54 m
Upper: 7,52" / 191 mm 261,98 ft / 79,85 m 7,97 ft / 2,43 m
Main Belt covers 89% of normal length
Main belt does not fully cover magazines and engineering spaces
- Torpedo Bulkhead:
1,57" / 40 mm 261,98 ft / 79,85 m 25,00 ft / 7,62 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 12,0" / 305 mm 9,02" / 229 mm 9,02" / 229 mm
2nd: 7,52" / 191 mm - -
- Armour deck: 2,52" / 64 mm, Conning tower: 12,01" / 305 mm
Machinery:
Coal fired boilers, steam turbines,
Geared drive, 4 shafts, 28 072 shp / 20 941 Kw = 21,80 kts
Range 6 000nm at 12,00 kts
Bunker at max displacement = 2 110 tons (100% coal)
Complement:
660 - 859
Cost:
£1,323 million / $5,291 million
Distribution of weights at normal displacement:
Armament: 849 tons, 5,9%
Armour: 5 000 tons, 34,5%
- Belts: 1 964 tons, 13,5%
- Torpedo bulkhead: 382 tons, 2,6%
- Armament: 1 322 tons, 9,1%
- Armour Deck: 1 177 tons, 8,1%
- Conning Tower: 154 tons, 1,1%
Machinery: 1 210 tons, 8,3%
Hull, fittings & equipment: 5 520 tons, 38,0%
Fuel, ammunition & stores: 1 930 tons, 13,3%
Miscellaneous weights: 0 tons, 0,0%
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
20 157 lbs / 9 143 Kg = 14,6 x 14,0 " / 356 mm shells or 3,5 torpedoes
Stability (Unstable if below 1.00): 1,12
Metacentric height 4,3 ft / 1,3 m
Roll period: 15,9 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0,67
Seaboat quality (Average = 1.00): 1,39
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0,574
Length to Beam Ratio: 5,82 : 1
'Natural speed' for length: 21,30 kts
Power going to wave formation at top speed: 53 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): -14,00 degrees
Stern overhang: 0,00 ft / 0,00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21,46 ft / 6,54 m
- Forecastle (23%): 19,95 ft / 6,08 m
- Mid (50%): 19,46 ft / 5,93 m
- Quarterdeck (20%): 20,44 ft / 6,23 m
- Stern: 20,93 ft / 6,38 m
- Average freeboard: 20,17 ft / 6,15 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 101,7%
- Above water (accommodation/working, high = better): 144,5%
Waterplane Area: 25 257 Square feet or 2 346 Square metres
Displacement factor (Displacement / loading): 102%
Structure weight / hull surface area: 149 lbs/sq ft or 726 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,91
- Longitudinal: 2,44
- Overall: 1,01
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily
