Pic by Wes
1914 Programme destroyers
Cervantes, Yucuman, Juan de Garray, San Juan, San Luis and Santa Cruz all sold to Mexico in 1937.
1916-programme destroyers
ARA King sunk 9/6/1935. Other three rebuilt as ASW destroyers (see below)
Basic sim for both classes
Yucuman Class, Argentina Destroyer laid down 1914
Displacement:
984 t light; 1,023 t standard; 1,099 t normal; 1,159 t full load
Dimensions: Length overall / water x beam x draught
316.16 ft / 309.00 ft x 28.60 ft x 9.50 ft (normal load)
96.37 m / 94.18 m x 8.72 m x 2.90 m
Armament:
5 - 3.94" / 100 mm guns in single mounts, 30.42lbs / 13.80kg shells, 1931 Model
Breech loading guns in deck mounts
on centreline ends, majority aft, 2 raised mounts - superfiring
6 - 0.79" / 20.0 mm guns (4 mounts), 0.24lbs / 0.11kg shells, 1931 Model
Anti-aircraft guns in deck mounts
on side ends, evenly spread
Weight of broadside 154 lbs / 70 kg
Shells per gun, main battery: 200
4 - 21.0" / 533.4 mm above water torpedoes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.79" / 20 mm 0.39" / 10 mm -
- Conning tower: 2.76" / 70 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 25,000 shp / 18,650 Kw = 31.09 kts
Range 3,800nm at 10.00 kts
Bunker at max displacement = 136 tons
Complement:
95 - 124
Cost:
£0.167 million / $0.669 million
Distribution of weights at normal displacement:
Armament: 19 tons, 1.8 %
Armour: 14 tons, 1.3 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 8 tons, 0.7 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 6 tons, 0.6 %
Machinery: 577 tons, 52.5 %
Hull, fittings & equipment: 349 tons, 31.8 %
Fuel, ammunition & stores: 115 tons, 10.4 %
Miscellaneous weights: 25 tons, 2.3 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
341 lbs / 155 Kg = 11.2 x 3.9 " / 100 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.44
Metacentric height 1.4 ft / 0.4 m
Roll period: 10.0 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.22
Seaboat quality (Average = 1.00): 1.22
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.458
Length to Beam Ratio: 10.80 : 1
'Natural speed' for length: 17.58 kts
Power going to wave formation at top speed: 67 %
Trim (Max stability = 0, Max steadiness = 100): 41
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: 19.69 ft / 6.00 m
- Forecastle (15 %): 19.69 ft / 6.00 m
- Mid (40 %): 19.69 ft / 6.00 m (10.50 ft / 3.20 m aft of break)
- Quarterdeck (15 %): 10.50 ft / 3.20 m
- Stern: 10.50 ft / 3.20 m
- Average freeboard: 14.17 ft / 4.32 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 185.7 %
- Above water (accommodation/working, high = better): 107.9 %
Waterplane Area: 5,675 Square feet or 527 Square metres
Displacement factor (Displacement / loading): 52 %
Structure weight / hull surface area: 28 lbs/sq ft or 138 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 2.61
- Overall: 0.59
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Good seaboat, rides out heavy weather easily
ASW Converisons
ARA Salto
ARA Segui (ex San Juan)
ARA Bathurst
All refitted during 1936 as anti-submarine escort destroyers replacing the obsolete 950 ton destroyers.
All decommissioned for disposal Q1/1945
Yucuman Class, Argentina Escort Destroyer laid down 1916
Displacement:
996 t light; 1,029 t standard; 1,099 t normal; 1,155 t full load
Dimensions: Length overall / water x beam x draught
316.16 ft / 309.00 ft x 28.60 ft x 9.50 ft (normal load)
96.37 m / 94.18 m x 8.72 m x 2.90 m
Armament:
4 - 3.94" / 100 mm guns (2x2 guns), 30.42lbs / 13.80kg shells, 1931 Model
Anti-aircraft guns in deck mounts
on centreline ends, evenly spread, all raised mounts - superfiring
2 - 1.46" / 37.0 mm guns (1x2 guns), 1.55lbs / 0.70kg shells, 1932 Model
Anti-aircraft guns in deck mount
on centreline aft, all raised guns - superfiring
6 - 0.79" / 20.0 mm guns (4 mounts), 0.24lbs / 0.11kg shells, 1932 Model
Anti-aircraft guns in deck mounts
on side ends, evenly spread, 4 raised mounts - superfiring
Weight of broadside 126 lbs / 57 kg
Shells per gun, main battery: 150
3 - 23.6" / 600 mm above water torpedoes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.39" / 10 mm -
- Conning tower: 2.76" / 70 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 25,000 shp / 18,650 Kw = 31.09 kts
Range 3,800nm at 10.00 kts
Bunker at max displacement = 126 tons
Complement:
95 - 124
Cost:
£0.210 million / $0.839 million
Distribution of weights at normal displacement:
Armament: 16 tons, 1.4 %
Armour: 12 tons, 1.1 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 6 tons, 0.5 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 6 tons, 0.6 %
Machinery: 572 tons, 52.1 %
Hull, fittings & equipment: 346 tons, 31.5 %
Fuel, ammunition & stores: 103 tons, 9.4 %
Miscellaneous weights: 50 tons, 4.6 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
336 lbs / 152 Kg = 11.0 x 3.9 " / 100 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.37
Metacentric height 1.3 ft / 0.4 m
Roll period: 10.4 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.22
Seaboat quality (Average = 1.00): 1.20
Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.458
Length to Beam Ratio: 10.80 : 1
'Natural speed' for length: 17.58 kts
Power going to wave formation at top speed: 67 %
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: 19.69 ft / 6.00 m
- Forecastle (15 %): 19.69 ft / 6.00 m
- Mid (40 %): 19.69 ft / 6.00 m (10.50 ft / 3.20 m aft of break)
- Quarterdeck (15 %): 10.50 ft / 3.20 m
- Stern: 10.50 ft / 3.20 m
- Average freeboard: 14.17 ft / 4.32 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 184.0 %
- Above water (accommodation/working, high = better): 110.4 %
Waterplane Area: 5,675 Square feet or 527 Square metres
Displacement factor (Displacement / loading): 54 %
Structure weight / hull surface area: 28 lbs/sq ft or 136 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 2.56
- Overall: 0.58
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Good seaboat, rides out heavy weather easily
Refit Alterations
Two twin 100mm M31 fitted
One twin 37mm M30 fitted aft
Two twin and two single 20mm
Triple 600mm torpedo mount replaced 21in torpdeoes
Italian commercial Sonar set fitted
Four DC throwers added (total 36 DC)
****
Mendoza Class
ARA La Plata and ARA Hercules sunk as war losses.
Rest of Mendoza Class still in commission. For basic Mendoza Class SS report please see destroyer section.
NB: ARA Cordoba completed to modified design as;
Argentina Destroyer laid down 1932
Displacement:
1,736 t light; 1,834 t standard; 2,030 t normal; 2,187 t full load
Dimensions: Length overall / water x beam x draught
369.19 ft / 361.55 ft x 33.79 ft x 13.78 ft (normal load)
112.53 m / 110.20 m x 10.30 m x 4.20 m
Armament:
6 - 4.53" / 115 mm guns (3x2 guns), 55.12lbs / 25.00kg shells, 1932 Model
Breech loading guns in deck mounts with hoists
on centreline, evenly spread, 1 raised mount
Aft Main mounts separated by engine room
4 - 1.46" / 37.0 mm guns (2x2 guns), 1.55lbs / 0.70kg shells, 1932 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
6 - 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, 4 raised mounts
Weight of broadside 338 lbs / 153 kg
Shells per gun, main battery: 300
8 - 21.0" / 533.4 mm above water torpedoes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm 0.98" / 25 mm 1.97" / 50 mm
2nd: 0.39" / 10 mm - -
3rd: 0.47" / 12 mm - -
- Conning tower: 2.76" / 70 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 40,800 shp / 30,437 Kw = 34.02 kts
Range 4,200nm at 15.00 kts
Bunker at max displacement = 353 tons
Complement:
150 - 196
Cost:
£1.049 million / $4.197 million
Distribution of weights at normal displacement:
Armament: 36 tons, 1.8 %
Armour: 35 tons, 1.7 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 26 tons, 1.3 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 10 tons, 0.5 %
Machinery: 1,000 tons, 49.3 %
Hull, fittings & equipment: 620 tons, 30.5 %
Fuel, ammunition & stores: 294 tons, 14.5 %
Miscellaneous weights: 45 tons, 2.2 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
575 lbs / 261 Kg = 12.4 x 4.5 " / 115 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.28
Metacentric height 1.5 ft / 0.5 m
Roll period: 11.4 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.57
Seaboat quality (Average = 1.00): 1.04
Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.422
Length to Beam Ratio: 10.70 : 1
'Natural speed' for length: 21.80 kts
Power going to wave formation at top speed: 67 %
Trim (Max stability = 0, Max steadiness = 100): 48
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: 21.00 ft / 6.40 m
- Forecastle (20 %): 20.34 ft / 6.20 m
- Mid (52 %): 20.34 ft / 6.20 m (10.50 ft / 3.20 m aft of break)
- Quarterdeck (15 %): 10.50 ft / 3.20 m
- Stern: 10.50 ft / 3.20 m
- Average freeboard: 15.67 ft / 4.78 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 176.7 %
- Above water (accommodation/working, high = better): 84.7 %
Waterplane Area: 7,919 Square feet or 736 Square metres
Displacement factor (Displacement / loading): 73 %
Structure weight / hull surface area: 37 lbs/sq ft or 182 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 2.25
- Overall: 0.58
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
****
ARA Heroina sunk 13/7/35
Sister Sarandi still in commission. For SS report of Italian Esploratore design please see destroyer section.