Destructores (Destroyers)
1912: Indomito-class
PRS
Indomito (I-1) - purchased from Italy December 1923
PRS
Impavido (I-2) - purchased from Italy December 1923
PRS
Insidioso (I-3) - purchased from Italy December 1923
PRS
Irrequieto (I-4) - purchased from Italy December 1923
Length, 260 ft x Beam, 26.0 ft x Depth, 10.8 ft
834 tons normal displacement (762 tons standard)
Main battery: 4 x 3.00-inch / 76.2mm
Light battery: 2 x 0.54-inch / 13.7mm
Weight of broadside: 54 lbs
3 TT, 18.0" (1 submerged)
Depth charges @ 550lb each: 30
Hull unarmored
Maximum speed for 25807 shp = 32.00 knots
Approximate cruising radius, 4000 nm / 10 kts
Typical complement: 78-101
Estimated cost, $391,000 (£98,000)
Remarks:
Caution: Hull structure is subject to strain in open-sea
conditions.
Oil firing.
Poor seaboat, wet and uncomfortable; reduced performance
in heavy weather.
Magazines and engineering spaces are cramped, with poor
watertight subdivision.
Cramped ship; poor crew accommodation, limited working space.
Distribution of weights:
Percent
normal
displacement:
Armament ......................... 7 tons = 1 pct
Machinery ........................ 473 tons = 57 pct
Hull and fittings; equipment ..... 251 tons = 30 pct
Fuel, ammunition, stores ......... 93 tons = 11 pct
Miscellaneous weights ............ 10 tons = 1 pct
-----
834 tons = 100 pct
Estimated metacentric height, 1.1 ft
Displacement summary:
Light ship: 741 tons
Standard displacement: 762 tons
Normal service: 834 tons
Full load: 889 tons
Loading submergence 105 tons/foot
+++++++++++++++++++++++++
Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.33
Shellfire needed to sink: 197 lbs = 14.6 x 3.0-inch shells
(Approximates weight of penetrating
shell hits needed to sink ship,
not counting critical hits)
Torpedoes needed to sink: 0.2
(Approximates number of 'typical'
torpedo hits needed to sink ship)
Relative steadiness as gun platform, 50 percent
(50 percent is 'average')
Relative rocking effect from firing to beam, 0.09
Relative quality as a seaboat: 0.79
+++++++++++++++++++++++++
Hull form characteristics:
Block coefficient: 0.40
Sharpness coefficient: 0.30
Hull speed coefficient 'M' = 8.44
'Natural speed' for length = 16.1 knots
Power going to wave formation
at top speed: 71 percent
Estimated hull characteristics and strength:
Relative underwater volume absorbed by
magazines and engineering spaces: 200 percent
Relative accommodation and working space: 89 percent
Displacement factor: 39 percent
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.59
(Structure weight per square
foot of hull surface: 33 lbs)
Relative longitudinal hull strength: 1.87
(for 11.68 ft average freeboard;
freeboard adjustment +2.48 ft)
Relative composite hull strength: 0.66
+++++++++++++++++++++++++
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1922: R-1-class (ex-torpedo boats)
PRS
R-1 - sold to Yugoslavia 14 June 1924
PRS
R-2 - sold to Yugoslavia 14 June 1924
PRS
R-3 - sold to Yugoslavia 14 June 1924
PRS
R-4
PRS
R-5
PRS
R-6 - scrapped
PRS
R-7
PRS
R-8
PRS
R-9
PRS
R-10 - sunk
Length, 235 ft x Beam, 23.5 ft x Depth, 11.0 ft
694 tons normal displacement (615 tons standard)
Main battery: 1 x 3.00-inch / 76mm
Secondary battery: 2 x 1.57-inch / 40mm
Weight of broadside: 17 lbs
8 TT, 18.0"
Hull unarmored
Battery armor:
Main, 1.0" shields / secondary, 0.5" shields
Maximum speed for 10415 shp = 26.25 knots
Approximate cruising radius, 1000 nm / 21 kts
Typical complement: 68-88
Estimated cost, $768,000 (£192,000)
Remarks:
Caution: Very cramped ship with excessively poor habitability;
lacks suitable working space.
Magazines and engineering spaces are cramped, with poor
watertight subdivision.
Distribution of weights:
Percent
normal
displacement:
Armament ......................... 2 tons = 0 pct
Armor, total ..................... 1 tons = 0 pct
Armament 1 tons = 0 pct
Machinery ........................ 340 tons = 49 pct
Hull and fittings; equipment ..... 256 tons = 37 pct
Fuel, ammunition, stores ......... 95 tons = 14 pct
Miscellaneous weights ............ 0 tons = 0 pct
-----
694 tons = 100 pct
Estimated metacentric height, 0.7 ft
Displacement summary:
Light ship: 600 tons
Standard displacement: 615 tons
Normal service: 694 tons
Full load: 755 tons
Loading submergence 85 tons/foot
+++++++++++++++++++++++++
Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.14
Shellfire needed to sink: 320 lbs = 23.7 x 3.0-inch shells
(Approximates weight of penetrating
shell hits needed to sink ship,
not counting critical hits)
Torpedoes needed to sink: 0.2
(Approximates number of 'typical'
torpedo hits needed to sink ship)
Relative steadiness as gun platform, 51 percent
(50 percent is 'average')
Relative rocking effect from firing to beam, 0.04
Relative quality as a seaboat: 1.01
+++++++++++++++++++++++++
Hull form characteristics:
Block coefficient: 0.40
Sharpness coefficient: 0.30
Hull speed coefficient 'M' = 8.11
'Natural speed' for length = 15.3 knots
Power going to wave formation
at top speed: 64 percent
Estimated hull characteristics and strength:
Relative underwater volume absorbed by
magazines and engineering spaces: 161 percent
Relative accommodation and working space: 22 percent
Displacement factor: 96 percent
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.92
(Structure weight per square
foot of hull surface: 40 lbs)
Relative longitudinal hull strength: 2.47
(for 10.0 ft average freeboard;
freeboard adjustment +1.1 ft)
Relative composite hull strength: 1.02
+++++++++++++++++++++++++
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1923: Rabihorcado-class
PRS
Rabihorcado (F-1)
PRS
Alcatraz (F-2)
PRS
Pelícano (F-3)
PRS
Águila (F-4)
PRS
Zampullín (F-5) - under construction
PRS
Rabijunco (F-6) under construction
PRS
Cormorán (F-7) under construction
Two additional ships planned
Length, 300 ft x Beam, 32.0 ft x Depth, 14.0 ft
1574 tons normal displacement (1450 tons standard)
Main battery: 2 x 4.00-inch / 102mm (2 x 1)
Secondary battery: 4 x 2.24-inch / 57mm
AA battery: 3 x 0.98-inch / 25mm
Light battery: 2 x 0.50-inch / 12.7mm (.54"/13.7mm on F-5 onwards)
Weight of broadside: 88 lbs
4 TT, 18.0"
Depth charges @ 550lb each: 40
Hull unarmored
Battery armor:
Main, 1.0" shields / secondary, 0.5" shields
AA, 0.25" shields
Maximum speed for 40017 shp = 32.76 knots
Approximate cruising radius, 4500 nm / 12 kts
Typical complement: 125-162
Estimated cost, $2.155 million (£539,000)
Remarks:
Caution: Hull structure is subject to strain in open-sea
conditions.
Ship has slow, easy roll; a good, steady gun platform.
Magazines and engineering spaces are cramped, with poor
watertight subdivision.
Distribution of weights:
Percent
normal
displacement:
Armament ......................... 11 tons = 1 pct
Armor, total ..................... 13 tons = 1 pct
Armament 13 tons = 1 pct
Machinery ........................ 904 tons = 57 pct
Hull and fittings; equipment ..... 470 tons = 30 pct
Fuel, ammunition, stores ......... 164 tons = 10 pct
Miscellaneous weights ............ 12 tons = 1 pct
-----
1574 tons = 100 pct
Estimated metacentric height, 1.3 ft
Displacement summary:
Light ship: 1411 tons
Standard displacement: 1450 tons
Normal service: 1574 tons
Full load: 1668 tons
Loading submergence 151 tons/foot
+++++++++++++++++++++++++
Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.25
Shellfire needed to sink: 412 lbs = 12.9 x 4.0-inch shells
(Approximates weight of penetrating
shell hits needed to sink ship,
not counting critical hits)
Torpedoes needed to sink: 0.2
(Approximates number of 'typical'
torpedo hits needed to sink ship)
Relative steadiness as gun platform, 71 percent
(50 percent is 'average')
Relative rocking effect from firing to beam, 0.22
Relative quality as a seaboat: 1.09
+++++++++++++++++++++++++
Hull form characteristics:
Block coefficient: 0.41
Sharpness coefficient: 0.31
Hull speed coefficient 'M' = 7.88
'Natural speed' for length = 17.3 knots
Power going to wave formation
at top speed: 71 percent
Estimated hull characteristics and strength:
Relative underwater volume absorbed by
magazines and engineering spaces: 191 percent
Relative accommodation and working space: 109 percent
Displacement factor: 56 percent
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.59
(Structure weight per square
foot of hull surface: 41 lbs)
Relative longitudinal hull strength: 2.40
(for 16.0 ft average freeboard;
freeboard adjustment +5.5 ft)
Relative composite hull strength: 0.68
+++++++++++++++++++++++++
Cazadores de submarinos (Subchasers)
None yet.