Patagonia Class
ARA Patagonia,
[ARA Pampas sunk 15/06/1935]
Battlecruiser laid down 1928
(sim by Red Admiral)
Displacement:
24,887 t light; 26,088 t standard; 27,586 t normal; 28,785 t full load
Dimensions: Length overall / water x beam x draught
737.60 ft / 721.78 ft x 87.60 ft x 28.54 ft (normal load)
224.82 m / 220.00 m x 26.70 m x 8.70 m
Armament:
8 - 12.01" / 305 mm guns (4x2 guns), 996.49lbs / 452.00kg shells, 1928 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
18 - 5.98" / 152 mm guns (6x3 guns), 110.23lbs / 50.00kg shells, 1928 Model
Breech loading guns in turrets (on barbettes)
on side, all forward
8 - 3.94" / 100 mm guns (4x2 guns), 30.42lbs / 13.80kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side, all forward
12 - 1.46" / 37.0 mm guns in single mounts, 1.55lbs / 0.70kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 10,218 lbs / 4,635 kg
Shells per gun, main battery: 110
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 10.6" / 270 mm 469.16 ft / 143.00 m 11.48 ft / 3.50 m
Ends: Unarmoured
Main Belt covers 100 % of normal length
- Torpedo Bulkhead:
1.18" / 30 mm 469.16 ft / 143.00 m 22.97 ft / 7.00 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 10.6" / 270 mm 7.09" / 180 mm 9.84" / 250 mm
2nd: 3.94" / 100 mm 1.97" / 50 mm 2.76" / 70 mm
3rd: 0.79" / 20 mm - -
4th: 0.39" / 10 mm - -
- Armour deck: 25mm forwards, 90mm over machinery, 120mm over magazines, 90mm over steering gear, Conning tower: 2.76" / 70 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 116,000 shp / 86,536 Kw = 31.00 kts
Range 10,000nm at 12.00 kts
Bunker at max displacement = 2,696 tons
Complement:
1,069 - 1,391
Cost:
£8.911 million / $35.646 million
Distribution of weights at normal displacement:
Armament: 1,140 tons, 4.1 %
Armour: 8,424 tons, 30.5 %
- Belts: 2,431 tons, 8.8 %
- Torpedo bulkhead: 471 tons, 1.7 %
- Armament: 2,405 tons, 8.7 %
- Armour Deck: 3,063 tons, 11.1 %
- Conning Tower: 54 tons, 0.2 %
Machinery: 3,611 tons, 13.1 %
Hull, fittings & equipment: 11,662 tons, 42.3 %
Fuel, ammunition & stores: 2,699 tons, 9.8 %
Miscellaneous weights: 50 tons, 0.2 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
41,520 lbs / 18,833 Kg = 48.0 x 12.0 " / 305 mm shells or 5.5 torpedoes
Stability (Unstable if below 1.00): 1.05
Metacentric height 4.5 ft / 1.4 m
Roll period: 17.3 seconds
Steadiness - As gun platform (Average = 50 %): 59 %
- Recoil effect (Restricted arc if above 1.00): 0.91
Seaboat quality (Average = 1.00): 1.20
Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.535
Length to Beam Ratio: 8.24 : 1
'Natural speed' for length: 31.01 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 49
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 34.45 ft / 10.50 m
- Forecastle (20 %): 27.89 ft / 8.50 m
- Mid (70 %): 27.89 ft / 8.50 m (18.04 ft / 5.50 m aft of break)
- Quarterdeck (15 %): 18.04 ft / 5.50 m
- Stern: 18.04 ft / 5.50 m
- Average freeboard: 25.46 ft / 7.76 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 96.8 %
- Above water (accommodation/working, high = better): 206.7 %
Waterplane Area: 45,283 Square feet or 4,207 Square metres
Displacement factor (Displacement / loading): 111 %
Structure weight / hull surface area: 173 lbs/sq ft or 845 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.54
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
****
1946 Refit
Patagonia, Argentina/ Italy Battlecruiser laid down 1928
Displacement:
24,882 t light; 26,088 t standard; 27,586 t normal; 28,785 t full load
Dimensions: Length overall / water x beam x draught
737.60 ft / 721.78 ft x 87.60 ft x 28.54 ft (normal load)
224.82 m / 220.00 m x 26.70 m x 8.70 m
Armament:
8 - 12.01" / 305 mm guns (4x2 guns), 996.49lbs / 452.00kg shells, 1928 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
18 - 5.98" / 152 mm guns (6x3 guns), 110.23lbs / 50.00kg shells, 1928 Model
Breech loading guns in turrets (on barbettes)
on side, evenly spread
8 - 3.94" / 100 mm guns (4x2 guns), 30.42lbs / 13.80kg shells, 1928 Model
Dual purpose guns in deck mounts
on side, all forward
16 - 2.17" / 55.0 mm guns (8x2 guns), 5.08lbs / 2.30kg shells, 1945 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 4 raised mounts
12 - 0.79" / 20.0 mm guns (6x2 guns), 0.24lbs / 0.11kg shells, 1936 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 4 raised mounts
Weight of broadside 10,284 lbs / 4,665 kg
Shells per gun, main battery: 110
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 10.6" / 270 mm 469.16 ft / 143.00 m 11.48 ft / 3.50 m
Ends: Unarmoured
Main Belt covers 100 % of normal length
- Torpedo Bulkhead:
1.18" / 30 mm 469.16 ft / 143.00 m 22.97 ft / 7.00 m
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 10.6" / 270 mm 7.09" / 180 mm 9.84" / 250 mm
2nd: 3.94" / 100 mm 1.97" / 50 mm 2.76" / 70 mm
3rd: 0.98" / 25 mm 0.59" / 15 mm -
4th: 0.59" / 15 mm 0.20" / 5 mm -
5th: 0.39" / 10 mm - -
- Armour deck: 3.66" / 93 mm, Conning tower: 2.76" / 70 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 116,000 shp / 86,536 Kw = 31.00 kts
Range 10,000nm at 12.00 kts
Bunker at max displacement = 2,696 tons
Complement:
1,069 - 1,391
Cost:
£8.937 million / $35.748 million
Distribution of weights at normal displacement:
Armament: 1,148 tons, 4.2 %
Armour: 8,415 tons, 30.5 %
- Belts: 2,431 tons, 8.8 %
- Torpedo bulkhead: 471 tons, 1.7 %
- Armament: 2,395 tons, 8.7 %
- Armour Deck: 3,063 tons, 11.1 %
- Conning Tower: 54 tons, 0.2 %
Machinery: 3,611 tons, 13.1 %
Hull, fittings & equipment: 11,648 tons, 42.2 %
Fuel, ammunition & stores: 2,705 tons, 9.8 %
Miscellaneous weights: 60 tons, 0.2 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
41,326 lbs / 18,745 Kg = 47.7 x 12.0 " / 305 mm shells or 5.4 torpedoes
Stability (Unstable if below 1.00): 1.05
Metacentric height 4.5 ft / 1.4 m
Roll period: 17.3 seconds
Steadiness - As gun platform (Average = 50 %): 59 %
- Recoil effect (Restricted arc if above 1.00): 0.92
Seaboat quality (Average = 1.00): 1.20
Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.535
Length to Beam Ratio: 8.24 : 1
'Natural speed' for length: 31.01 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 49
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 34.45 ft / 10.50 m
- Forecastle (20 %): 27.89 ft / 8.50 m
- Mid (70 %): 27.89 ft / 8.50 m (18.04 ft / 5.50 m aft of break)
- Quarterdeck (15 %): 18.04 ft / 5.50 m
- Stern: 18.04 ft / 5.50 m
- Average freeboard: 25.46 ft / 7.76 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 97.2 %
- Above water (accommodation/working, high = better): 206.7 %
Waterplane Area: 45,283 Square feet or 4,207 Square metres
Displacement factor (Displacement / loading): 111 %
Structure weight / hull surface area: 173 lbs/sq ft or 844 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.54
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Note: Deck armour weight simulates the following; 25mm forwards, 90mm over machinery, 120mm over magazines, 90mm over steering gear
Refit Changes
New shields to 100mm gun mounts
New twin 55mm mounts replacing 37mm singles on forward superstructure, quarterdeck and upper deck
Twin 20mm mounts added (2x2 on bridge structure, 2x2 near mainmast and 1x2 each on B and X turret)
One Surface Search and one Gunnery Radio-Location set added
Four new model secondary directors fitted
New catapult fitted (one catapult removed to save weight)