WesWorld

Teniente Serrano

Chilean Heavy Destroyer laid down 1929

Displacement:
1,988 t light; 2,094 t standard; 2,408 t normal; 2,649 t full load

Dimensions: Length overall / water x beam x draught
377.13 ft / 372.00 ft x 36.00 ft x 14.50 ft (normal load)
114.95 m / 113.39 m x 10.97 m x 4.42 m

Armament:
8 - 5.00" / 127 mm guns (4x2 guns), 62.50lbs / 28.35kg shells, 1929 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
8 - 1.46" / 37.0 mm guns (4x2 guns), 1.55lbs / 0.70kg shells, 1929 Model
Anti-aircraft guns in deck mounts
on side, all amidships
2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1929 Model
Machine guns in deck mounts
on side, all amidships, all raised mounts - superfiring
Weight of broadside 513 lbs / 232 kg
Shells per gun, main battery: 200
8 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.50" / 38 mm - -
2nd: 1.00" / 25 mm - -
3rd: 0.50" / 13 mm - -

- Conning tower: 1.50" / 38 mm

Machinery:
Oil fired boilers, steam turbines,
Direct drive, 3 shafts, 40,000 shp / 29,840 Kw = 33.01 kts
Range 6,000nm at 15.00 kts (Bunkerage = 565 tons)

Complement:
171 - 223

Cost:
£1.104 million / $4.417 million

Distribution of weights at normal displacement:
Armament: 64 tons, 2.7 %
Armour: 37 tons, 1.5 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 31 tons, 1.3 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 6 tons, 0.2 %
Machinery: 1,090 tons, 45.3 %
Hull, fittings & equipment: 772 tons, 32.1 %
Fuel, ammunition & stores: 420 tons, 17.4 %
Miscellaneous weights: 25 tons, 1.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
747 lbs / 339 Kg = 12.0 x 5.0 " / 127 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.17
Metacentric height 1.4 ft / 0.4 m
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.96
Seaboat quality (Average = 1.00): 1.21

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.434
Length to Beam Ratio: 10.33 : 1
'Natural speed' for length: 22.13 kts
Power going to wave formation at top speed: 66 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 7.76 degrees
Stern overhang: 2.00 ft / 0.61 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 23.00 ft / 7.01 m
- Forecastle (20 %): 19.00 ft / 5.79 m
- Mid (50 %): 16.00 ft / 4.88 m
- Quarterdeck (15 %): 16.00 ft / 4.88 m
- Stern: 16.00 ft / 4.88 m
- Average freeboard: 17.37 ft / 5.29 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 168.4 %
- Above water (accommodation/working, high = better): 95.8 %
Waterplane Area: 8,759 Square feet or 814 Square metres
Displacement factor (Displacement / loading): 79 %
Structure weight / hull surface area: 41 lbs/sq ft or 199 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 2.66
- Overall: 0.60
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

A bit slow?

Arrgh, another gun calibre.

33 knots isn't too slow for something that is replacing old light cruisers.

The 5 inch guns are intended to be the same as those on the Almirante Gideon...so American 5 inch 51 caliber. As this was the only thing I had between 110 and 150 mm that I want to keep, it made sense. As soon as the older destroyer leaders are old enough I'm removing the 4.7 and 4 inch inch guns from service in favor of the 110 mm and 5 inch guns.

Makes sense...

The Philippines also has a glut of gun calibres, but I intend to whittle them down to:
13.7mm
35mm
75mm
115mm
155mm
210mm
...and a few larger calibres. ;-)
(the 25mm, 57mm and 130mm calibres will remain on a few vessels...but the 100mm will be phased out as ships come in for refit.)