Another go, 115mm guns, more ammo, more range/bunkerage but 0.5kts slower and a bit fatter. Change to two qaud torpedo mounts too to save space.
Project 414C, Argentina Torpedo Destroyer laid down 1935
Displacement:
1,260 t light; 1,337 t standard; 1,489 t normal; 1,611 t full load
Dimensions: Length overall / water x beam x draught
378.38 ft / 360.89 ft x 32.81 ft x 10.99 ft (normal load)
115.33 m / 110.00 m x 10.00 m x 3.35 m
Armament:
6 - 4.53" / 115 mm guns (3x2 guns), 55.12lbs / 25.00kg shells, 1932 Model
Quick firing guns in deck mounts
on centreline ends, majority aft, 1 raised mount aft - 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 forward, all raised guns - superfiring
4 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1932 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
Weight of broadside 335 lbs / 152 kg
Shells per gun, main battery: 250
8 - 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 -
2nd: 0.39" / 10 mm - -
- Conning tower: 1.97" / 50 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 30,900 shp / 23,051 Kw = 33.49 kts
Range 2,650nm at 18.00 kts
Bunker at max displacement = 274 tons
Complement:
119 - 155
Cost:
£0.866 million / $3.464 million
Distribution of weights at normal displacement:
Armament: 35 tons, 2.4 %
Armour: 19 tons, 1.3 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 13 tons, 0.9 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 6 tons, 0.4 %
Machinery: 688 tons, 46.2 %
Hull, fittings & equipment: 468 tons, 31.4 %
Fuel, ammunition & stores: 229 tons, 15.4 %
Miscellaneous weights: 50 tons, 3.4 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
515 lbs / 234 Kg = 11.1 x 4.5 " / 115 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.42
Metacentric height 1.7 ft / 0.5 m
Roll period: 10.5 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.29
Seaboat quality (Average = 1.00): 1.15
Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.400
Length to Beam Ratio: 11.00 : 1
'Natural speed' for length: 21.80 kts
Power going to wave formation at top speed: 65 %
Trim (Max stability = 0, Max steadiness = 100): 44
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 9.84 ft / 3.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21.00 ft / 6.40 m
- Forecastle (20 %): 18.37 ft / 5.60 m
- Mid (47 %): 14.76 ft / 4.50 m
- Quarterdeck (15 %): 9.84 ft / 3.00 m
- Stern: 9.84 ft / 3.00 m
- Average freeboard: 14.51 ft / 4.42 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 172.7 %
- Above water (accommodation/working, high = better): 70.0 %
Waterplane Area: 7,566 Square feet or 703 Square metres
Displacement factor (Displacement / loading): 71 %
Structure weight / hull surface area: 32 lbs/sq ft or 155 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.86
- Overall: 0.57
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
[Edit, I've now changed her design further, added another 5m on the waterline, 30 tons more displacement, mostly gone towards bunkerage, extra 300hp power, better seakeeping so freeboard reduced and extra weight freed gone into bunkerage. I will post a revised SS report later]