La Argentina
ARA La Argentina
La Argentina, Argentina Heavy Cruiser laid down 1933
Displacement:
11,647 t light; 12,208 t standard; 13,283 t normal; 14,143 t full load
Dimensions: Length overall / water x beam x draught
634.11 ft / 623.36 ft x 67.26 ft x 21.49 ft (normal load)
193.28 m / 190.00 m x 20.50 m x 6.55 m
Armament:
12 - 7.48" / 190 mm guns (4x3 guns), 253.53lbs / 115.00kg shells, 1933 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
12 - 3.94" / 100 mm guns (6x2 guns), 30.51lbs / 13.84kg shells, 1931 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships
12 - 1.46" / 37.0 mm guns (6x2 guns), 1.55lbs / 0.70kg shells, 1933 Model
Anti-aircraft guns in deck mounts
on side ends, evenly spread, all raised mounts - superfiring
12 - 0.79" / 20.0 mm guns (2x6 guns), 0.24lbs / 0.11kg shells, 1933 Model
Anti-aircraft guns in deck mounts
on side, all forward, all raised mounts - superfiring
Weight of broadside 3,430 lbs / 1,556 kg
Shells per gun, main battery: 150
12 - 23.6" / 600 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.72" / 120 mm 367.45 ft / 112.00 m 11.48 ft / 3.50 m
Ends: Unarmoured
Main Belt covers 91 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 4.72" / 120 mm 2.76" / 70 mm 2.76" / 70 mm
2nd: 0.79" / 20 mm 0.59" / 15 mm 1.18" / 30 mm
3rd: 0.39" / 10 mm - -
4th: 0.47" / 12 mm - -
- Armour deck: 2.76" / 70 mm, Conning tower: 3.15" / 80 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 93,000 shp / 69,378 Kw = 32.56 kts
Range 7,500nm at 15.00 kts
Bunker at max displacement = 1,935 tons
Complement:
618 - 804
Cost:
£5.159 million / $20.637 million
Distribution of weights at normal displacement:
Armament: 362 tons, 2.7 %
Armour: 2,852 tons, 21.5 %
- Belts: 850 tons, 6.4 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 461 tons, 3.5 %
- Armour Deck: 1,503 tons, 11.3 %
- Conning Tower: 38 tons, 0.3 %
Machinery: 2,710 tons, 20.4 %
Hull, fittings & equipment: 5,643 tons, 42.5 %
Fuel, ammunition & stores: 1,636 tons, 12.3 %
Miscellaneous weights: 80 tons, 0.6 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
19,167 lbs / 8,694 Kg = 91.6 x 7.5 " / 190 mm shells or 2.1 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 3.4 ft / 1.0 m
Roll period: 15.2 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.73
Seaboat quality (Average = 1.00): 1.16
Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.516
Length to Beam Ratio: 9.27 : 1
'Natural speed' for length: 28.61 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 52
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 29.53 ft / 9.00 m
- Forecastle (18 %): 22.97 ft / 7.00 m
- Mid (50 %): 22.31 ft / 6.80 m
- Quarterdeck (18 %): 22.31 ft / 6.80 m
- Stern: 22.31 ft / 6.80 m
- Average freeboard: 23.01 ft / 7.01 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 88.8 %
- Above water (accommodation/working, high = better): 153.3 %
Waterplane Area: 29,489 Square feet or 2,740 Square metres
Displacement factor (Displacement / loading): 118 %
Structure weight / hull surface area: 122 lbs/sq ft or 597 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.94
- Longitudinal: 1.66
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent