WesWorld

To counter the new Brazillian and Chilean designs the Argentine Navy is moving ahead with a class of five new 115mm standard destroyers. Eventually twelve may be built up to 1940.



Future Destroyer Class, Argentina Destroyer laid down 1933

Displacement:
1,570 t light; 1,654 t standard; 1,894 t normal; 2,086 t full load

Dimensions: Length overall / water x beam x draught
385.06 ft / 377.30 ft x 35.43 ft x 12.30 ft (normal load)
117.37 m / 115.00 m x 10.80 m x 3.75 m

Armament:
6 - 4.53" / 115 mm guns (3x2 guns), 55.12lbs / 25.00kg shells, 1933 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, majority forward, 2 raised mounts - superfiring
4 - 1.46" / 37.0 mm guns (2x2 guns), 1.55lbs / 0.70kg shells, 1933 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
6 - 0.79" / 20.0 mm guns (1x6 guns), 0.24lbs / 0.11kg shells, 1933 Model
Anti-aircraft guns in deck mount
on centreline amidships, all raised guns - superfiring
4 - 0.79" / 20.0 mm guns (2x2 guns), 0.24lbs / 0.11kg shells, 1933 Model
Anti-aircraft guns in deck mounts
on side ends, evenly spread
Weight of broadside 339 lbs / 154 kg
Shells per gun, main battery: 240
6 - 23.6" / 600 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.59" / 15 mm 0.79" / 20 mm
2nd: 0.39" / 10 mm - -
3rd: 0.47" / 12 mm - -

- Conning tower: 1.97" / 50 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 34,353 shp / 25,628 Kw = 33.26 kts
Range 5,500nm at 15.00 kts
Bunker at max displacement = 432 tons

Complement:
143 - 186

Cost:
£0.978 million / $3.911 million

Distribution of weights at normal displacement:
Armament: 36 tons, 1.9 %
Armour: 21 tons, 1.1 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 14 tons, 0.8 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 6 tons, 0.3 %
Machinery: 870 tons, 45.9 %
Hull, fittings & equipment: 578 tons, 30.5 %
Fuel, ammunition & stores: 324 tons, 17.1 %
Miscellaneous weights: 65 tons, 3.4 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
602 lbs / 273 Kg = 13.0 x 4.5 " / 115 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.34
Metacentric height 1.8 ft / 0.5 m
Roll period: 11.2 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.48
Seaboat quality (Average = 1.00): 1.03

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.403
Length to Beam Ratio: 10.65 : 1
'Natural speed' for length: 22.34 kts
Power going to wave formation at top speed: 64 %
Trim (Max stability = 0, Max steadiness = 100): 49
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: 21.33 ft / 6.50 m
- Forecastle (20 %): 19.69 ft / 6.00 m
- Mid (43 %): 19.69 ft / 6.00 m (10.66 ft / 3.25 m aft of break)
- Quarterdeck (15 %): 10.66 ft / 3.25 m
- Stern: 10.66 ft / 3.25 m
- Average freeboard: 14.67 ft / 4.47 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 167.8 %
- Above water (accommodation/working, high = better): 96.1 %
Waterplane Area: 8,555 Square feet or 795 Square metres
Displacement factor (Displacement / loading): 80 %
Structure weight / hull surface area: 36 lbs/sq ft or 178 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.52
- Overall: 0.55
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate

Excellent design and a very nice drawing. =)

Interesting to compare with the Swampy's Piquero class..

1932 || 1933
1,633t || 1,654t
6x115mm || 6x115mm
8x610mm || 6x600mm
33.71knots || 33.26knots

I think the biggest difference is that your guns are simmed as DP weapons, whereas the turrets on the Piqueros have only minimal AA capability.

Logical

So you´re going to build some british M-class DDs (HMS MARTIN laid down 23.10.39)? That´s where your darwing came from, right?

I think she´s too slow for a fleet DD, but that´s probably just me. Historically the Ms had machinery capable of producing about 48,000shp.

Her forward RF seems to be a stereoscope-type of German origin. Are you sure it can turn being so close to her main mast?

The drawing is indeed an M class. It was my inspiration and I feel DP is the way to go over the heavy DD Chile is pursuing. She may be slower than some other foreign types but she is no slouch and I was aiming at maximum firepower on the smallest possible hull. I'd hate to be in an aircraft facing the kind of firepower she has (6x115mm 4x37mm 10x20mm).

I think the RF should have enough room to turn.