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(Historical data)

Almirante Villar, Indian designed Peruvian light battleship laid down 1936

Almirante Villar laid down 1936
Almirante Guise cancelled, never laid down

Displacement: 22,800 t light; 23,985 t standard; 25,944 t normal; 27,510 t full load

Dimensions: Length overall / water x beam x draught

742.30 ft / 721.78 ft x 82.02 ft x 27.89 ft (normal load) [226.25 m / 220.00 m x 25.00 m x 8.50 m]

Armament:

8 - 12.01" / 305 mm guns (2x4 guns), 865.70lbs / 392.68kg shells, 1936 Model Breech loading guns in turrets (on barbettes) on centreline ends, evenly spread
8 - 4.72" / 120 mm guns (4x2 guns), 52.72lbs / 23.92kg shells, 1936 Model Dual purpose guns in deck mounts with hoists on centreline ends, evenly spread, all raised mounts - superfiring
8 - 4.72" / 120 mm guns (4x2 guns), 52.72lbs / 23.92kg shells, 1936 Model Dual purpose guns in deck mounts with hoists on side, evenly spread
16 - 1.46" / 37.0 mm guns (8x2 guns), 1.55lbs / 0.70kg shells, 1936 Model Anti-aircraft guns in deck mounts on side, evenly spread, all raised mounts
16 - 0.79" / 20.0 mm guns (8x2 guns), 0.24lbs / 0.11kg shells, 1936 Model Machine guns in deck mounts on side, evenly spread, all raised mounts
Weight of broadside 7,798 lbs / 3,537 kg
Shells per gun, main battery: 150

Armour:

Belts: Width (max) Length (avg) Height (avg)
Main: 11.8" / 300 mm 469.16 ft / 143.00 m 10.86 ft / 3.31 m
Ends: Unarmoured
Main Belt covers 100 % of normal length

Torpedo Bulkhead: 1.57" / 40 mm 469.16 ft / 143.00 m 25.59 ft / 7.80 m

Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 13.8" / 350 mm 7.87" / 200 mm 11.8" / 300 mm
2nd: 1.18" / 30 mm 0.79" / 20 mm 1.18" / 30 mm
3rd: 1.18" / 30 mm - -
4th: 0.79" / 20 mm - -
5th: 0.79" / 20 mm - -

Armour deck: 3.94" / 100 mm, Conning tower: 13.78" / 350 mm

Machinery:

Oil fired boilers, steam turbines, Geared drive, 4 shafts, 127,346 shp / 95,000 Kw = 32.03 kts
Range 15,000nm at 12.00 kts (Bunkerage = 3,525 tons)

Complement: 1,021 - 1,328

Cost: £11.162 million / $44.650 million

Distribution of weights at normal displacement:
Armament: 975 tons, 3.8 %
Armour: 8,062 tons, 31.1 %
- Belts: 2,540 tons, 9.8 %
- Torpedo bulkhead: 700 tons, 2.7 %
- Armament: 1,430 tons, 5.5 %
- Armour Deck: 3,133 tons, 12.1 %
- Conning Tower: 260 tons, 1.0 %
Machinery: 3,573 tons, 13.8 %
Hull, fittings & equipment: 10,040 tons, 38.7 %
Fuel, ammunition & stores: 3,144 tons, 12.1 %
Miscellaneous weights: 150 tons, 0.6 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 28,181 lbs / 12,783 Kg = 32.6 x 12.0 " / 305 mm shells or 3.5 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 4.4 ft / 1.4 m
Roll period: 16.3 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.66
Seaboat quality (Average = 1.00): 1.09

Hull form characteristics:

Hull has a flush deck and transom stern
Block coefficient: 0.550
Length to Beam Ratio: 8.80 : 1
'Natural speed' for length: 30.79 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 55
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 29.86 ft / 9.10 m
- Forecastle (20 %): 22.31 ft / 6.80 m
- Mid (50 %): 22.31 ft / 6.80 m
- Quarterdeck (15 %): 22.31 ft / 6.80 m
- Stern: 22.31 ft / 6.80 m
- Average freeboard: 22.91 ft / 6.98 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 99.2 %
- Above water (accommodation/working, high = better): 179.0 %
Waterplane Area: 43,014 Square feet or 3,996 Square metres
Displacement factor (Displacement / loading): 112 %
Structure weight / hull surface area: 157 lbs/sq ft or 769 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.37
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent


Refitted in 1948 as follows:

Almirante Villar, Peruvian Light Battleship laid down 1936

Displacement: 22,800 t light; 23,985 t standard; 25,944 t normal; 27,510 t full load

Dimensions: Length overall / water x beam x draught

742.30 ft / 721.78 ft x 82.02 ft x 27.89 ft (normal load) [226.25 m / 220.00 m x 25.00 m x 8.50 m]

Armament:

8 - 12.01" / 305 mm guns (2x4 guns), 865.70lbs / 392.68kg shells, 1936 Model Breech loading guns in turrets (on barbettes) on centerline ends, evenly spread
8 - 4.72" / 120 mm guns (4x2 guns), 52.72lbs / 23.92kg shells, 1936 Model Dual purpose guns in deck mounts with hoists on centerline ends, evenly spread, all raised mounts - superfiring
8 - 4.72" / 120 mm guns (4x2 guns), 52.72lbs / 23.92kg shells, 1936 Model Dual purpose guns in deck mounts with hoists on side, evenly spread
16 - 1.46" / 37.0 mm guns (8x2 guns), 1.55lbs / 0.70kg shells, 1936 Model Anti-aircraft guns in deck mounts on side, evenly spread, all raised mounts
16 - 0.79" / 20.0 mm guns (8x2 guns), 0.24lbs / 0.11kg shells, 1936 Model Machine guns in deck mounts on side, evenly spread, all raised mounts
Weight of broadside 7,798 lbs / 3,537 kg
Shells per gun, main battery: 150

Armor:

Belts: Width (max) Length (avg) Height (avg)
Main: 11.8" / 300 mm 469.16 ft / 143.00 m 10.86 ft / 3.31 m
Ends: Unarmored
Main Belt covers 100 % of normal length

Torpedo Bulkhead: 1.57" / 40 mm 469.16 ft / 143.00 m 25.59 ft / 7.80 m

Gun armor: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 13.8" / 350 mm 7.87" / 200 mm 11.8" / 300 mm
2nd: 1.18" / 30 mm 0.79" / 20 mm 1.18" / 30 mm
3rd: 1.18" / 30 mm - -
4th: 0.79" / 20 mm - -
5th: 0.79" / 20 mm - -

Armor deck: 3.94" / 100 mm, Conning tower: 13.78" / 350 mm

Machinery:

Oil fired boilers, steam turbines, Geared drive, 4 shafts, 127,343 shp / 94,998 Kw = 32.03 kts
Range 15,000nm at 12.00 kts
Bunker at max displacement = 3,525 tons

Complement: 1,021 - 1,328

Cost: £11.162 million / $44.649 million

Distribution of weights at normal displacement:

Armament: 975 tons, 3.8 %
Armor: 8,058 tons, 31.1 %
- Belts: 2,540 tons, 9.8 %
- Torpedo bulkhead: 700 tons, 2.7 %
- Armament: 1,426 tons, 5.5 %
- Armor Deck: 3,133 tons, 12.1 %
- Conning Tower: 260 tons, 1.0 %
Machinery: 3,573 tons, 13.8 %
Hull, fittings & equipment: 10,044 tons, 38.7 %
Fuel, ammunition & stores: 3,144 tons, 12.1 %
Miscellaneous weights: 150 tons, 0.6 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 37,272 lbs / 16,906 Kg = 43.1 x 12.0 " / 305 mm shells or 5.2 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 4.4 ft / 1.4 m
Roll period: 16.3 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.66
Seaboat quality (Average = 1.00): 1.09

Hull form characteristics:

Hull has a flush deck and transom stern
Block coefficient: 0.550
Length to Beam Ratio: 8.80: 1
'Natural speed' for length: 30.79 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 55
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 29.86 ft / 9.10 m
- Forecastle (20 %): 22.31 ft / 6.80 m
- Mid (50 %): 22.31 ft / 6.80 m
- Quarterdeck (15 %): 22.31 ft / 6.80 m
- Stern: 22.31 ft / 6.80 m
- Average freeboard: 22.91 ft / 6.98 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 99.2 %
- Above water (accommodation/working, high = better): 179.0 %
Waterplane Area: 43,014 Square feet or 3,996 Square meters
Displacement factor (Displacement / loading): 112 %
Structure weight / hull surface area: 157 lbs/sq ft or 769 Kg/sq meter
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.37
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent

Refit Scheme -

Add surface search, air search, and fire control radars - 150 tons

Cost – 1,140 tons
Time – 48 days


Almirante Villar – Refit begun 1 July 1948, refit completed 18 August 1948