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Using the experience of building the last two Belgrano cruisers in home yards the Argentine Navy has developed a 3x3 150mm gunned ship. Five of these will be built from 1942 onwards.
Also for those of you interested here is the SS report.
Project 326A, Argentina Light Cruiser laid down 1942
Displacement:
7,882 t light; 8,227 t standard; 9,003 t normal; 9,624 t full load
Dimensions: Length overall / water x beam x draught
566.09 ft / 557.74 ft x 59.06 ft x 19.69 ft (normal load)
172.55 m / 170.00 m x 18.00 m x 6.00 m
Armament:
9 - 5.91" / 150 mm guns (3x3 guns), 100.31lbs / 45.50kg shells, 1935 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
8 - 4.53" / 115 mm guns (4x2 guns), 55.12lbs / 25.00kg shells, 1936 Model
Dual purpose guns in deck mounts with hoists
on side ends, evenly spread
12 - 1.46" / 37.0 mm guns (6x2 guns), 1.55lbs / 0.70kg shells, 1940 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, 1936 Model
Anti-aircraft guns in deck mounts
on side ends, evenly spread, all raised mounts - superfiring
Weight of broadside 1,365 lbs / 619 kg
Shells per gun, main battery: 200
6 - 23.6" / 600 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.94" / 100 mm 328.08 ft / 100.00 m 9.84 ft / 3.00 m
Ends: Unarmoured
Main Belt covers 90 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.94" / 100 mm 2.95" / 75 mm 1.97" / 50 mm
2nd: 1.97" / 50 mm 0.79" / 20 mm 1.97" / 50 mm
3rd: 0.39" / 10 mm - -
4th: 0.47" / 12 mm - -
- Armour deck: 1.97" / 50 mm, Conning tower: 0.98" / 25 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 75,000 shp / 55,950 Kw = 32.58 kts
Range 7,500nm at 15.00 kts
Bunker at max displacement = 1,397 tons
Complement:
461 - 600
Cost:
£4.383 million / $17.531 million
Distribution of weights at normal displacement:
Armament: 165 tons, 1.8 %
Armour: 1,607 tons, 17.8 %
- Belts: 540 tons, 6.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 237 tons, 2.6 %
- Armour Deck: 820 tons, 9.1 %
- Conning Tower: 9 tons, 0.1 %
Machinery: 1,959 tons, 21.8 %
Hull, fittings & equipment: 3,952 tons, 43.9 %
Fuel, ammunition & stores: 1,121 tons, 12.4 %
Miscellaneous weights: 200 tons, 2.2 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
14,864 lbs / 6,742 Kg = 144.3 x 5.9 " / 150 mm shells or 1.8 torpedoes
Stability (Unstable if below 1.00): 1.20
Metacentric height 3.2 ft / 1.0 m
Roll period: 13.9 seconds
Steadiness - As gun platform (Average = 50 %): 55 %
- Recoil effect (Restricted arc if above 1.00): 0.43
Seaboat quality (Average = 1.00): 1.47
Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.486
Length to Beam Ratio: 9.44 : 1
'Natural speed' for length: 27.12 kts
Power going to wave formation at top speed: 59 %
Trim (Max stability = 0, Max steadiness = 100): 37
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 31.17 ft / 9.50 m
- Forecastle (20 %): 24.61 ft / 7.50 m
- Mid (45 %): 22.97 ft / 7.00 m
- Quarterdeck (15 %): 22.97 ft / 7.00 m
- Stern: 22.97 ft / 7.00 m
- Average freeboard: 24.02 ft / 7.32 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 88.4 %
- Above water (accommodation/working, high = better): 182.3 %
Waterplane Area: 22,528 Square feet or 2,093 Square metres
Displacement factor (Displacement / loading): 128 %
Structure weight / hull surface area: 98 lbs/sq ft or 481 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.90
- Longitudinal: 2.64
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Good seaboat, rides out heavy weather easily
Class Names: Santisima Trinidad, Moreno, Rivadavia, Fortaleza, Delante
Misc Weight:
28 tons for two triple torpedo mounts and twelve 600mm torpdoes
75 tons for one catapult and two aircraft
10 tons air conditioning and heating
25 tons for two RDF sets
20 tons for additional equipment in command spaces
40 tons for growth
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