WesWorld

Light Cruisers
BC - Blindados Cruiser (Armoured Cruiser)
CP - Cruiser, Pesada (Cruiser, Heavy)
CL - Cruiser Ligero (Light Cruiser)
CLAA - Cruiser Ligero, Antiaérea (Light AA Cruiser)

Atacama-class Light Cruiser
- Atacama (CL-6): In service, refitted 1943-44.
- Picunches (CL-7): In service, refitted 1945-46.
- Antofagasta (CL-9): In service, refitted 1946-47.

Concepción-class Light Cruiser
- Concepción (ex-Warrior) (CL-12): Retired 9/1947.
- Chillán (ex-Vindex) (CL-13): In service

Magallanes-class Light Cruiser
- Magallanes (CL-14): In service
- Aisén (CL-15): Delayed, cancelled

Araucanía-class Light Antiair Cruiser
- Araucanía (CLAA-16): Laid down 1/1/1946.
- Los Lagos (CLAA-17): Laid down 1/1/1946.
- Valparaíso (CLAA-18): Laid down 9/1/1946.
- Bío Bío (CLAA-19): Laid down for 9/1/1946.

Arica-class Light Antiair Cruiser
- Arica (CLAA-20): Laid down 7/1/1947.

Atacama-class, Chilean Light Cruiser laid down 1926 (Engine 1943)
Between 1943 and 1944, a refit program for the Atacama-class cruisers was instituted.

Displacement:
9,165 t light; 9,554 t standard; 10,975 t normal; 12,113 t full load

Dimensions: Length overall / water x beam x draught
556.95 ft / 551.00 ft x 64.00 ft x 22.60 ft (normal load)
169.76 m / 167.94 m x 19.51 m x 6.89 m

Armament:
12 - 5.91" / 150 mm guns (4x3 guns), 102.98lbs / 46.71kg shells, 1926 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
8 - 4.33" / 110 mm guns (4x2 guns), 40.61lbs / 18.42kg shells, 1943 Model
Dual purpose guns in deck mounts with hoists
on centreline, all amidships
12 - 1.57" / 40.0 mm guns (6x2 guns), 1.95lbs / 0.88kg shells, 1943 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
16 - 1.10" / 27.9 mm guns (2x8 guns), 0.67lbs / 0.30kg shells, 1943 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 1,595 lbs / 723 kg
Shells per gun, main battery: 180
12 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.33" / 110 mm 350.00 ft / 106.68 m 10.00 ft / 3.05 m
Ends: Unarmoured
Upper: 2.76" / 70 mm 170.00 ft / 51.82 m 5.00 ft / 1.52 m
Main Belt covers 98 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.51" / 140 mm 3.94" / 100 mm 3.15" / 80 mm
2nd: 0.79" / 20 mm 0.20" / 5 mm 0.20" / 5 mm
3rd: 0.20" / 5 mm 0.20" / 5 mm -
4th: 0.20" / 5 mm 0.20" / 5 mm -

- Armour deck: 1.97" / 50 mm, Conning tower: 1.57" / 40 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 93,433 shp / 69,701 Kw = 32.00 kts
Range 12,000nm at 15.00 kts
Bunker at max displacement = 2,559 tons

Complement:
535 - 696

Cost:
£2.854 million / $11.414 million

Distribution of weights at normal displacement:
Armament: 199 tons, 1.8 %
Armour: 2,018 tons, 18.4 %
- Belts: 758 tons, 6.9 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 401 tons, 3.7 %
- Armour Deck: 842 tons, 7.7 %
- Conning Tower: 17 tons, 0.2 %
Machinery: 2,413 tons, 22.0 %
Hull, fittings & equipment: 4,235 tons, 38.6 %
Fuel, ammunition & stores: 1,811 tons, 16.5 %
Miscellaneous weights: 300 tons, 2.7 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
15,149 lbs / 6,871 Kg = 147.1 x 5.9 " / 150 mm shells or 1.9 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 3.1 ft / 0.9 m
Roll period: 15.4 seconds
Steadiness - As gun platform (Average = 50 %): 64 %
- Recoil effect (Restricted arc if above 1.00): 0.44
Seaboat quality (Average = 1.00): 1.16

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.482
Length to Beam Ratio: 8.61 : 1
'Natural speed' for length: 23.47 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 55
Bow angle (Positive = bow angles forward): 12.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 28.00 ft / 8.53 m
- Forecastle (25 %): 27.00 ft / 8.23 m
- Mid (60 %): 26.00 ft / 7.92 m (16.00 ft / 4.88 m aft of break)
- Quarterdeck (18 %): 16.00 ft / 4.88 m
- Stern: 16.00 ft / 4.88 m
- Average freeboard: 22.53 ft / 6.87 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 89.2 %
- Above water (accommodation/working, high = better): 141.4 %
Waterplane Area: 23,118 Square feet or 2,148 Square metres
Displacement factor (Displacement / loading): 126 %
Structure weight / hull surface area: 108 lbs/sq ft or 529 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 2.07
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent

Breakdown of Miscellaneous Weights:
- 75 tons for 3x Coati seaplanes
- 15 tons for catapult and crane
- 120 tons for Electronics Suite
- 50 tons for crew comforts (air conditioning, movie theatre, and ice cream machine)
- 25 tons for electronic fire-control on 150mm, 110mm, and 40mm guns
- 15 tons for extra damage-control gear, pumps, etc
Total weight: 300 tons

Ships in Class:
- CNS Atacama (refitted 1943-1944)
- CNS Picunches (refitted 1945-1946)
- CNS Antofagasta (refitted 1946-1947)




Image by thesmilingassassin and colored by Brockpaine

Atacama-class, Chilean Light Cruiser laid down 1926 (Atlantean design)
Original design of these cruisers prior to refit.

Displacement:
9,747 t light; 10,105 t standard; 10,975 t normal; 11,671 t full load

Dimensions: Length overall / water x beam x draught
556.95 ft / 551.00 ft x 64.00 ft x 22.60 ft (normal load)
169.76 m / 167.94 m x 19.51 m x 6.89 m

Armament:
12 - 5.90" / 150 mm guns (4x3 guns), 102.69lbs / 46.58kg shells, 1926 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
8 - 4.33" / 110 mm guns (4x2 guns), 40.59lbs / 18.41kg shells, 1926 Model
Quick firing guns in deck mounts
on side, all aft
12 - 1.46" / 37.0 mm guns (6x2 guns), 1.54lbs / 0.70kg shells, 1926 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 1,575 lbs / 715 kg
Shells per gun, main battery: 150
12 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.10" / 104 mm 350.00 ft / 106.68 m 10.00 ft / 3.05 m
Ends: Unarmoured
Upper: 2.76" / 70 mm 170.00 ft / 51.82 m 5.00 ft / 1.52 m
Main Belt covers 98 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.50" / 140 mm 3.92" / 100 mm 3.15" / 80 mm
2nd: 1.00" / 25 mm - -

- Armour deck: 1.57" / 40 mm, Conning tower: 1.57" / 40 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 82,011 shp / 61,180 Kw = 31.00 kts
Range 10,000nm at 12.00 kts
Bunker at max displacement = 1,566 tons

Complement:
535 - 696

Cost:
£3.020 million / $12.079 million

Distribution of weights at normal displacement:
Armament: 197 tons, 1.8 %
Armour: 1,825 tons, 16.6 %
- Belts: 724 tons, 6.6 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 413 tons, 3.8 %
- Armour Deck: 671 tons, 6.1 %
- Conning Tower: 17 tons, 0.2 %
Machinery: 2,625 tons, 23.9 %
Hull, fittings & equipment: 4,950 tons, 45.1 %
Fuel, ammunition & stores: 1,228 tons, 11.2 %
Miscellaneous weights: 150 tons, 1.4 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
14,422 lbs / 6,542 Kg = 140.4 x 5.9 " / 150 mm shells or 1.8 torpedoes
Stability (Unstable if below 1.00): 1.08
Metacentric height 2.9 ft / 0.9 m
Roll period: 15.7 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.45
Seaboat quality (Average = 1.00): 1.26

Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.482
Length to Beam Ratio: 8.61 : 1
'Natural speed' for length: 23.47 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 56
Bow angle (Positive = bow angles forward): 12.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 28.00 ft / 8.53 m
- Forecastle (25 %): 27.50 ft / 8.38 m (26.00 ft / 7.92 m aft of break)
- Mid (45 %): 26.00 ft / 7.92 m
- Quarterdeck (18 %): 16.00 ft / 4.88 m
- Stern: 16.00 ft / 4.88 m
- Average freeboard: 22.78 ft / 6.94 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 93.5 %
- Above water (accommodation/working, high = better): 143.4 %
Waterplane Area: 23,118 Square feet or 2,148 Square metres
Displacement factor (Displacement / loading): 125 %
Structure weight / hull surface area: 126 lbs/sq ft or 615 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.09
- Longitudinal: 2.48
- Overall: 1.18
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

Breakdown of Miscellaneous Weights:
N/A

Ships in Class:
- Atacama (CL-6) - 1926 (Atlantis-built)
- Picunches (CL-7) - 1927 (Atlantis-built)
- Antofagasta (CL-9) - 1932 (Atlantis-built)

Image by Wes/thesmilingassassin and colored by me.

Concepción and Chillán, Atlantean Warrior-class Light cruiser laid down 1916

Displacement:
6,984 t light; 7,195 t standard; 7,700 t normal; 8,104 t full load

Dimensions: Length overall / water x beam x draught
578.88 ft / 575.00 ft x 56.00 ft x 18.00 ft (normal load)
176.44 m / 175.26 m x 17.07 m x 5.49 m

Armament:
5 - 5.50" / 140 mm guns in single mounts, 83.19lbs / 37.73kg shells, 1916 Model
Breech loading guns in deck mounts
on centreline ends, majority forward, 1 raised mount
2 - 5.50" / 140 mm guns in single mounts, 83.19lbs / 37.73kg shells, 1916 Model
Breech loading guns in deck mounts
on side, all amidships
4 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1916 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
8 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1916 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 640 lbs / 290 kg
Shells per gun, main battery: 150
8 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.15" / 80 mm 480.00 ft / 146.30 m 12.00 ft / 3.66 m
Ends: 1.57" / 40 mm 95.00 ft / 28.96 m 8.00 ft / 2.44 m
Upper: 0.78" / 20 mm 200.00 ft / 60.96 m 0.00 ft / 0.00 m
Main Belt covers 128 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.57" / 40 mm - -

- Armour deck: 1.18" / 30 mm, Conning tower: 5.90" / 150 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 75,814 shp / 56,557 Kw = 32.50 kts
Range 5,600nm at 12.00 kts
Bunker at max displacement = 909 tons

Complement:
410 - 534

Cost:
£1.157 million / $4.628 million

Distribution of weights at normal displacement:
Armament: 80 tons, 1.0 %
Armour: 1,298 tons, 16.9 %
- Belts: 769 tons, 10.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 25 tons, 0.3 %
- Armour Deck: 454 tons, 5.9 %
- Conning Tower: 50 tons, 0.6 %
Machinery: 2,825 tons, 36.7 %
Hull, fittings & equipment: 2,731 tons, 35.5 %
Fuel, ammunition & stores: 717 tons, 9.3 %
Miscellaneous weights: 50 tons, 0.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
6,265 lbs / 2,842 Kg = 75.3 x 5.5 " / 140 mm shells or 1.0 torpedoes
Stability (Unstable if below 1.00): 1.33
Metacentric height 3.5 ft / 1.1 m
Roll period: 12.6 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.09
Seaboat quality (Average = 1.00): 1.06

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.465
Length to Beam Ratio: 10.27 : 1
'Natural speed' for length: 23.98 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 66
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22.00 ft / 6.71 m
- Forecastle (20 %): 20.00 ft / 6.10 m
- Mid (65 %): 20.00 ft / 6.10 m (10.00 ft / 3.05 m aft of break)
- Quarterdeck (15 %): 10.00 ft / 3.05 m
- Stern: 10.00 ft / 3.05 m
- Average freeboard: 16.66 ft / 5.08 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 127.8 %
- Above water (accommodation/working, high = better): 135.5 %
Waterplane Area: 20,799 Square feet or 1,932 Square metres
Displacement factor (Displacement / loading): 101 %
Structure weight / hull surface area: 84 lbs/sq ft or 412 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.00
- Longitudinal: 1.08
- Overall: 1.01
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform

Breakdown of Miscellaneous Weights:
N/A

Ships in Class:
- Concepción (ex-Warrior) (CL-12) - 1916/1938)
- Chillán (ex-Vindex) (CL-13) - 1916/1938)

Notes:
A rebuilt is planned for 1940 to rebuild these two vessels into 10x130mm-armed CLAAs.




Image by Wes/thesmilingassassin and colored by me.

Flak Cruiser Rebuild for 1940

Displacement:
6,645 t light; 6,991 t standard; 7,700 t normal; 8,268 t full load

Dimensions: Length overall / water x beam x draught
575.00 ft / 575.00 ft x 56.00 ft x 18.00 ft (normal load)
175.26 m / 175.26 m x 17.07 m x 5.49 m

Armament:
10 - 5.12" / 130 mm guns (5x2 guns), 67.03lbs / 30.40kg shells, 1940 Model
Automatic rapid fire guns in deck mounts with hoists
on centreline ends, majority forward, 3 raised mounts - superfiring
8 - 3.00" / 76.2 mm guns (4x2 guns), 13.50lbs / 6.12kg shells, 1939 Model
Dual purpose guns in deck mounts
on side, all amidships
24 - 1.57" / 40.0 mm guns (6x4 guns), 1.95lbs / 0.88kg shells, 1939 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
12 - 0.79" / 20.0 mm guns (6x2 guns), 0.24lbs / 0.11kg shells, 1916 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 828 lbs / 376 kg
Shells per gun, main battery: 385
8 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.74" / 95 mm 480.00 ft / 146.30 m 12.00 ft / 3.66 m
Ends: 1.57" / 40 mm 95.00 ft / 28.96 m 8.00 ft / 2.44 m
Main Belt covers 128 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.57" / 40 mm 0.79" / 20 mm 1.18" / 30 mm
2nd: 0.79" / 20 mm - -
3rd: 0.39" / 10 mm - -

- Armour deck: 1.18" / 30 mm, Conning tower: 5.91" / 150 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 75,814 shp / 56,557 Kw = 32.50 kts
Range 7,000nm at 15.00 kts
Bunker at max displacement = 1,277 tons

Complement:
410 - 534

Cost:
£1.010 million / $4.041 million

Distribution of weights at normal displacement:
Armament: 120 tons, 1.6 %
Armour: 1,457 tons, 18.9 %
- Belts: 905 tons, 11.8 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 48 tons, 0.6 %
- Armour Deck: 454 tons, 5.9 %
- Conning Tower: 50 tons, 0.6 %
Machinery: 2,027 tons, 26.3 %
Hull, fittings & equipment: 2,910 tons, 37.8 %
Fuel, ammunition & stores: 1,056 tons, 13.7 %
Miscellaneous weights: 130 tons, 1.7 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
9,311 lbs / 4,223 Kg = 138.9 x 5.1 " / 130 mm shells or 1.4 torpedoes
Stability (Unstable if below 1.00): 1.16
Metacentric height 2.8 ft / 0.8 m
Roll period: 14.2 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.27
Seaboat quality (Average = 1.00): 1.01

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.465
Length to Beam Ratio: 10.27 : 1
'Natural speed' for length: 23.98 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 69
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22.00 ft / 6.71 m
- Forecastle (20 %): 20.00 ft / 6.10 m
- Mid (65 %): 20.00 ft / 6.10 m (10.00 ft / 3.05 m aft of break)
- Quarterdeck (15 %): 10.00 ft / 3.05 m
- Stern: 10.00 ft / 3.05 m
- Average freeboard: 16.66 ft / 5.08 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 101.2 %
- Above water (accommodation/working, high = better): 135.5 %
Waterplane Area: 20,799 Square feet or 1,932 Square metres
Displacement factor (Displacement / loading): 117 %
Structure weight / hull surface area: 90 lbs/sq ft or 439 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.09
- Overall: 1.00
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

Breakdown of Miscellaneous Weights:
N/A, includes radar

Ships in Class:
- Concepción (ex-Warrior) (CL-12) - 1916/1938, rebuilt 1940
- Chillán (ex-Vindex) (CL-13) - 1916/1938, rebuilt 1940

Notes:
Guns simmed as automatic to provide extra weight for operation.

Magallanes, Chilean Cruiser laid down 1940

Following the 1937 Peruvian War, the Armada de Chile's planning staff was alarmed by the rapid rebound and modernization of Peruvian naval assets. Although the Peruvian Congressionalists won the Civil War, and the Chilean Navy decisively retained overall control of the Pacific Ocean throughout the campaign, the Peruvian Presidentialist naval forces put up a commendable fight considering the odds against them. Chilean naval attaches in Europe quickly learned of the construction of two Geman-designed 15x6" light cruisers, Quechua and Quito, in German yards. This rapid Peruvian resurgence required a Chilean response.

In 1938, the Naval Board approved the first designs for what would eventually become the Magallanes-class light cruisers. The design team based their new ship off a 12x6" cruiser design dating from the tense days of the South American War, but substantially updated the vessel's capabilities in terms of armour, speed, range, and most importantly, electronics and fire-control fit. The Naval Board, based on their experience with the preceding Atacama-class cruisers and observation of the Argentine General Belgrano-class (very similar to the Peruvian Q-class), specified a twelve-gun layout with a 34-knot speed and heavy cruiser-level armoured protection. All this was acquired at high cost, and by the time of her keel-laying, Magallanes was the largest "light cruiser" by displacement in the world. In fact, the Magallanes was larger than the first Chilean heavy cruisers, and displaced only eight hundred tons less at full load than their coast defense battleship.

Having seen firsthand during the Peruvian War what their own naval aircraft could dish out, the Chileans fitted a heavy secondary battery of dual-purpose 110mm guns, supplemented by triple 40mm mounts. Some officers pushed hard to equip the ships with the 3" automatic guns just entering service, but this never panned out.

Displacement:
12,000 t light; 12,509 t standard; 14,749 t normal; 16,541 t full load

Dimensions: Length overall / water x beam x draught
688.98 ft / 672.57 ft x 59.06 ft (Bulges 67.26 ft) x 23.79 ft (normal load)
210.00 m / 205.00 m x 18.00 m (Bulges 20.50 m) x 7.25 m

Armament:
12 - 5.91" / 150 mm guns (4x3 guns), 102.98lbs / 46.71kg shells, 1940 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
4 - 4.33" / 110 mm guns (2x2 guns), 40.61lbs / 18.42kg shells, 1940 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, all raised mounts
8 - 4.33" / 110 mm guns (4x2 guns), 40.61lbs / 18.42kg shells, 1940 Model
Dual purpose guns in deck mounts with hoists
on side, evenly spread
24 - 1.57" / 40.0 mm guns (8x3 guns), 1.95lbs / 0.89kg shells, 1940 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
24 - 0.79" / 20.0 mm guns (12x2 guns), 0.24lbs / 0.11kg shells, 1940 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 1,776 lbs / 805 kg
Shells per gun, main battery: 200
12 - 23.6" / 600 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5.91" / 150 mm 426.51 ft / 130.00 m 13.12 ft / 4.00 m
Ends: Unarmoured
Main Belt covers 98 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 7.99" / 203 mm 3.94" / 100 mm 4.72" / 120 mm
2nd: 0.98" / 25 mm 0.20" / 5 mm -
3rd: 0.98" / 25 mm 0.20" / 5 mm -

- Armour deck: 2.56" / 65 mm, Conning tower: 5.91" / 150 mm

Machinery:
Oil fired boilers, steam turbines,
Electric motors, 4 shafts, 111,934 shp / 83,502 Kw = 34.00 kts
Range 16,000nm at 15.00 kts
Bunker at max displacement = 4,032 tons

Complement:
668 - 869

Cost:
£6.153 million / $24.611 million

Distribution of weights at normal displacement:
Armament: 222 tons, 1.5 %
Armour: 3,228 tons, 21.9 %
- Belts: 1,364 tons, 9.2 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 509 tons, 3.5 %
- Armour Deck: 1,279 tons, 8.7 %
- Conning Tower: 77 tons, 0.5 %
Machinery: 2,993 tons, 20.3 %
Hull, fittings & equipment: 5,307 tons, 36.0 %
Fuel, ammunition & stores: 2,749 tons, 18.6 %
Miscellaneous weights: 250 tons, 1.7 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
19,347 lbs / 8,776 Kg = 187.9 x 5.9 " / 150 mm shells or 2.3 torpedoes
Stability (Unstable if below 1.00): 1.11
Metacentric height 2.8 ft / 0.8 m
Roll period: 17.0 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.34
Seaboat quality (Average = 1.00): 1.12

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.480
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 29.67 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 62
Bow angle (Positive = bow angles forward): 25.35 degrees
Stern overhang: 1.64 ft / 0.50 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 31.17 ft / 9.50 m
- Forecastle (25 %): 20.67 ft / 6.30 m
- Mid (50 %): 19.36 ft / 5.90 m
- Quarterdeck (15 %): 18.04 ft / 5.50 m
- Stern: 19.69 ft / 6.00 m
- Average freeboard: 20.60 ft / 6.28 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 80.5 %
- Above water (accommodation/working, high = better): 109.2 %
Waterplane Area: 27,012 Square feet or 2,510 Square metres
Displacement factor (Displacement / loading): 131 %
Structure weight / hull surface area: 113 lbs/sq ft or 553 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.26
- Overall: 1.01
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform

Breakdown of Miscellaneous Weights:
75 tons for 3x ENAER Coati SN1E seaplanes
35 tons for catapult
10 tons for air-conditioning and heating
15 tons for crew comforts, movie theatre, and ice cream machines
10 tons for fresh water makers
50 tons for squadron flagship facilities
55 tons for Type A-41 Electronics Suite
Total extra weight - 250 tons

Electronics:
Type A-41 Electronics Suite not yet declassified

Ships in Class:
- Magallanes (CL-14) - laid down 1940
- Aisén (CL-15) - ordered for 1942, cancelled

Drawing by Huehen, used with permission.

Araucanía-class, Chilean Cruiser Ligero Antiaérea laid down 1946

Displacement:
8,000 t light; 8,583 t standard; 9,925 t normal; 10,999 t full load

Dimensions: Length overall / water x beam x draught
616.80 ft / 600.72 ft x 54.63 ft x 21.33 ft (normal load)
188.00 m / 183.10 m x 16.65 m x 6.50 m

Armament:
8 - 5.91" / 150 mm guns (4x2 guns), 114.86lbs / 52.10kg shells, 1946 Model
Automatic rapid fire guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
12 - 2.95" / 75.0 mm guns (6x2 guns), 12.87lbs / 5.84kg shells, 1946 Model
Automatic rapid fire guns in deck mounts with hoists
on side, evenly spread, all raised mounts
4 - 1.57" / 40.0 mm guns (2x2 guns), 1.95lbs / 0.88kg shells, 1946 Model
Anti-aircraft guns in deck mounts
on centreline ends, evenly spread, all raised mounts
4 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.89kg shells, 1946 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 1,089 lbs / 494 kg
Shells per gun, main battery: 600
6 - 21.0" / 533 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.35" / 85 mm 344.49 ft / 105.00 m 13.12 ft / 4.00 m
Ends: Unarmoured
Main Belt covers 88 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.94" / 100 mm 2.36" / 60 mm 2.36" / 60 mm
2nd: 0.79" / 20 mm 0.39" / 10 mm 0.39" / 10 mm
3rd: 0.59" / 15 mm - -

- Armour deck: 1.77" / 45 mm, Conning tower: 3.94" / 100 mm

Machinery:
Oil fired boilers, steam turbines plus diesel motors,
Electric motors, 2 shafts, 81,604 shp / 60,877 Kw = 33.00 kts
Range 8,500nm at 18.00 kts
Bunker at max displacement = 2,416 tons

Complement:
496 - 646

Cost:
£4.895 million / $19.578 million

Distribution of weights at normal displacement:
Armament: 149 tons, 1.5 %
Armour: 1,628 tons, 16.4 %
- Belts: 636 tons, 6.4 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 211 tons, 2.1 %
- Armour Deck: 743 tons, 7.5 %
- Conning Tower: 39 tons, 0.4 %
Machinery: 2,038 tons, 20.5 %
Hull, fittings & equipment: 3,810 tons, 38.4 %
Fuel, ammunition & stores: 1,925 tons, 19.4 %
Miscellaneous weights: 375 tons, 3.8 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
14,847 lbs / 6,734 Kg = 144.2 x 5.9 " / 150 mm shells or 1.8 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 2.5 ft / 0.8 m
Roll period: 14.5 seconds
Steadiness - As gun platform (Average = 50 %): 63 %
- Recoil effect (Restricted arc if above 1.00): 0.49
Seaboat quality (Average = 1.00): 1.23

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.496
Length to Beam Ratio: 11.00 : 1
'Natural speed' for length: 27.78 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 51
Bow angle (Positive = bow angles forward): 26.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 26.25 ft / 8.00 m
- Forecastle (35 %): 21.98 ft / 6.70 m
- Mid (70 %): 21.98 ft / 6.70 m (13.45 ft / 4.10 m aft of break)
- Quarterdeck (30 %): 14.11 ft / 4.30 m
- Stern: 14.76 ft / 4.50 m
- Average freeboard: 20.31 ft / 6.19 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 86.0 %
- Above water (accommodation/working, high = better): 167.2 %
Waterplane Area: 22,660 Square feet or 2,105 Square metres
Displacement factor (Displacement / loading): 137 %
Structure weight / hull surface area: 97 lbs/sq ft or 474 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.62
- Overall: 1.01
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Good seaboat, rides out heavy weather easily

Breakdown of Miscellaneous Weights:
- 148 tons for four automatic 15cm gun turrets (+37 tons each turret)
- 90 tons for Suite-47 electronics
- 14 tons for six reload torpedoes (4,410 lb each)
- 30 tons for air-conditioning and heating
- 30 tons for miscellaneous radio, electronics and ECM gear
- 63 tons for crew comforts and other unspecified gear
375 tons total miscellaneous weight

Ships in Class:
- Araucanía (CLAA-16): Laid down 1/1/1946.
- Los Lagos (CLAA-17): Laid down 1/1/1946.
- Valparaíso (CLAA-18): Laid down 9/1/1946.
- Bío Bío (CLAA-19): Laid down for 9/1/1946.

Arica, Chilean Cruiser Ligero Antiaérea laid down 1947

Displacement:
5,275 t light; 5,654 t standard; 6,453 t normal; 7,092 t full load

Dimensions: Length overall / water x beam x draught
517.73 ft / 508.53 ft x 54.13 ft x 16.40 ft (normal load)
157.80 m / 155.00 m x 16.50 m x 5.00 m

Armament:
10 - 5.12" / 130 mm guns (5x2 guns), 67.03lbs / 30.41kg shells, 1947 Model
Automatic rapid fire guns in deck mounts with hoists
on centreline ends, majority forward, 3 raised mounts - superfiring
8 - 2.95" / 75.0 mm guns (4x2 guns), 12.87lbs / 5.84kg shells, 1947 Model
Anti-aircraft guns in deck mounts with hoists
on side, all amidships
8 - 1.10" / 27.9 mm guns (2x4 guns), 0.67lbs / 0.30kg shells, 1947 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 779 lbs / 353 kg
Shells per gun, main battery: 550
6 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1.26" / 32 mm 360.89 ft / 110.00 m 9.84 ft / 3.00 m
Ends: Unarmoured
Main Belt covers 109 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.57" / 40 mm 0.79" / 20 mm 0.79" / 20 mm
2nd: 0.98" / 25 mm 0.59" / 15 mm -
3rd: 0.59" / 15 mm - -

- Armour deck: 0.59" / 15 mm, Conning tower: 1.97" / 50 mm

Machinery:
Oil fired boilers, steam turbines plus diesel motors,
Electric motors, 2 shafts, 67,303 shp / 50,208 Kw = 33.00 kts
Range 10,000nm at 15.00 kts
Bunker at max displacement = 1,438 tons

Complement:
359 - 467

Cost:
£3.733 million / $14.931 million

Distribution of weights at normal displacement:
Armament: 114 tons, 1.8 %
Armour: 457 tons, 7.1 %
- Belts: 185 tons, 2.9 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 49 tons, 0.8 %
- Armour Deck: 208 tons, 3.2 %
- Conning Tower: 15 tons, 0.2 %
Machinery: 1,663 tons, 25.8 %
Hull, fittings & equipment: 2,742 tons, 42.5 %
Fuel, ammunition & stores: 1,178 tons, 18.3 %
Miscellaneous weights: 300 tons, 4.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
8,210 lbs / 3,724 Kg = 122.5 x 5.1 " / 130 mm shells or 1.2 torpedoes
Stability (Unstable if below 1.00): 1.11
Metacentric height 2.4 ft / 0.7 m
Roll period: 14.6 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.40
Seaboat quality (Average = 1.00): 1.15

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.500
Length to Beam Ratio: 9.39 : 1
'Natural speed' for length: 25.86 kts
Power going to wave formation at top speed: 62 %
Trim (Max stability = 0, Max steadiness = 100): 61
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: 25.26 ft / 7.70 m
- Forecastle (25 %): 24.93 ft / 7.60 m
- Mid (50 %): 24.61 ft / 7.50 m (16.73 ft / 5.10 m aft of break)
- Quarterdeck (15 %): 16.73 ft / 5.10 m
- Stern: 16.73 ft / 5.10 m
- Average freeboard: 20.83 ft / 6.35 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 105.5 %
- Above water (accommodation/working, high = better): 172.7 %
Waterplane Area: 19,076 Square feet or 1,772 Square metres
Displacement factor (Displacement / loading): 129 %
Structure weight / hull surface area: 86 lbs/sq ft or 420 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 2.14
- Overall: 1.00
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

Breakdown of Miscellaneous Weights:
- 150t for 13cm gun automation (30t per turret)
- 90t for electronics
- 40 tons for air-conditioning
- 20 tons for fleet combat information center

Ships in Class:
- Arica (CLAA-20): laid down 7/1/1947