NUEVE DE JULIO, COMODORE PY, HIPOLITO BOUCHARD, ESPORA (laid down Q1/36)
Light Scout Cruiser, Atlantis Design Scout Cruiser laid down 1932
Displacement:
4,277 t light; 4,454 t standard; 4,944 t normal; 5,337 t full load
Dimensions: Length overall / water x beam x draught
485.91 ft / 475.00 ft x 46.00 ft x 18.00 ft (normal load)
148.11 m / 144.78 m x 14.02 m x 5.49 m
Armament:
10 - 5.12" / 130 mm guns (5x2 guns), 66.14lbs / 30.00kg shells, 1932 Model
Breech loading guns in deck mounts with hoists
on centreline ends, majority aft, 3 raised mounts - superfiring
4 - 1.46" / 37.0 mm guns (2x2 guns), 1.55lbs / 0.70kg shells, 1932 Model
Anti-aircraft guns in deck mounts
on centreline ends, evenly spread, all raised mounts
8 - 1.46" / 37.0 mm guns (4x2 guns), 1.55lbs / 0.70kg shells, 1932 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
8 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1932 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
8 - 0.50" / 12.7 mm guns (4x2 guns), 0.06lbs / 0.03kg shells, 1932 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 682 lbs / 310 kg
Shells per gun, main battery: 200
12 - 23.6" / 599.44 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1.57" / 40 mm 429.99 ft / 131.06 m 8.01 ft / 2.44 m
Ends: Unarmoured
Main Belt covers 139 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm 0.79" / 20 mm 1.97" / 50 mm
- Armour deck: 0.79" / 20 mm, Conning tower: 3.15" / 80 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 63,484 shp / 47,359 Kw = 34.00 kts
Range 6,200nm at 15.00 kts
Bunker at max displacement = 883 tons
Complement:
294 - 383
Cost:
£2.203 million / $8.811 million
Distribution of weights at normal displacement:
Armament: 86 tons, 1.7 %
Armour: 486 tons, 9.8 %
- Belts: 213 tons, 4.3 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 44 tons, 0.9 %
- Armour Deck: 209 tons, 4.2 %
- Conning Tower: 20 tons, 0.4 %
Machinery: 1,874 tons, 37.9 %
Hull, fittings & equipment: 1,761 tons, 35.6 %
Fuel, ammunition & stores: 667 tons, 13.5 %
Miscellaneous weights: 70 tons, 1.4 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
2,960 lbs / 1,342 Kg = 44.1 x 5.1 " / 130 mm shells or 0.7 torpedoes
Stability (Unstable if below 1.00): 1.28
Metacentric height 2.4 ft / 0.7 m
Roll period: 12.4 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.43
Seaboat quality (Average = 1.00): 1.20
Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.440
Length to Beam Ratio: 10.33 : 1
'Natural speed' for length: 25.00 kts
Power going to wave formation at top speed: 62 %
Trim (Max stability = 0, Max steadiness = 100): 42
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: 29.99 ft / 9.14 m
- Forecastle (20 %): 18.21 ft / 5.55 m
- Mid (50 %): 18.21 ft / 5.55 m
- Quarterdeck (15 %): 18.21 ft / 5.55 m
- Stern: 18.21 ft / 5.55 m
- Average freeboard: 19.15 ft / 5.84 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 138.1 %
- Above water (accommodation/working, high = better): 88.4 %
Waterplane Area: 14,359 Square feet or 1,334 Square metres
Displacement factor (Displacement / loading): 99 %
Structure weight / hull surface area: 64 lbs/sq ft or 314 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.72
- Longitudinal: 2.15
- Overall: 0.80
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Good seaboat, rides out heavy weather easily
****
1946 Refits
Displacement:
4,277 t light; 4,454 t standard; 4,944 t normal; 5,337 t full load
Dimensions: Length overall / water x beam x draught
485.91 ft / 475.00 ft x 46.00 ft x 18.00 ft (normal load)
148.11 m / 144.78 m x 14.02 m x 5.49 m
Armament:
10 - 5.12" / 130 mm guns (5x2 guns), 66.14lbs / 30.00kg shells, 1932 Model
Breech loading guns in deck mounts with hoists
on centreline ends, majority aft, 3 raised mounts - superfiring
4 - 1.46" / 37.0 mm guns (2x2 guns), 1.55lbs / 0.70kg shells, 1944 Model
Anti-aircraft guns in deck mounts
on centreline ends, evenly spread, all raised mounts
8 - 1.46" / 37.0 mm guns (4x2 guns), 1.55lbs / 0.70kg shells, 1944 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, 1932 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 684 lbs / 310 kg
Shells per gun, main battery: 200
12 - 23.6" / 599.44 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1.57" / 40 mm 429.99 ft / 131.06 m 8.01 ft / 2.44 m
Ends: Unarmoured
Main Belt covers 139 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm 0.79" / 20 mm 1.97" / 50 mm
- Armour deck: 0.79" / 20 mm, Conning tower: 3.15" / 80 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 63,484 shp / 47,359 Kw = 34.00 kts
Range 6,200nm at 15.00 kts
Bunker at max displacement = 883 tons
Complement:
294 - 383
Cost:
£2.203 million / $8.813 million
Distribution of weights at normal displacement:
Armament: 87 tons, 1.8 %
Armour: 486 tons, 9.8 %
- Belts: 213 tons, 4.3 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 44 tons, 0.9 %
- Armour Deck: 209 tons, 4.2 %
- Conning Tower: 20 tons, 0.4 %
Machinery: 1,874 tons, 37.9 %
Hull, fittings & equipment: 1,760 tons, 35.6 %
Fuel, ammunition & stores: 668 tons, 13.5 %
Miscellaneous weights: 70 tons, 1.4 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
2,957 lbs / 1,341 Kg = 44.1 x 5.1 " / 130 mm shells or 0.7 torpedoes
Stability (Unstable if below 1.00): 1.28
Metacentric height 2.4 ft / 0.7 m
Roll period: 12.4 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.43
Seaboat quality (Average = 1.00): 1.20
Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.440
Length to Beam Ratio: 10.33 : 1
'Natural speed' for length: 25.00 kts
Power going to wave formation at top speed: 62 %
Trim (Max stability = 0, Max steadiness = 100): 42
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: 29.99 ft / 9.14 m
- Forecastle (20 %): 18.21 ft / 5.55 m
- Mid (50 %): 18.21 ft / 5.55 m
- Quarterdeck (15 %): 18.21 ft / 5.55 m
- Stern: 18.21 ft / 5.55 m
- Average freeboard: 19.15 ft / 5.84 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 138.2 %
- Above water (accommodation/working, high = better): 88.4 %
Waterplane Area: 14,359 Square feet or 1,334 Square metres
Displacement factor (Displacement / loading): 99 %
Structure weight / hull surface area: 64 lbs/sq ft or 314 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.72
- Longitudinal: 2.15
- Overall: 0.80
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Good seaboat, rides out heavy weather easily
Refit Notes
Replacement of twin 37mm mounts with new 1944 Model mounts
Replacement of single 20mm mounts with new twin mounts
Removal of 12.7mm machine-guns
Refurbishment of internal fittings for life extension
Replacement of LA and HA rangefinders with new HA/LA director towers