WesWorld

Sánchez Carrión, Peruvian Gunboat-Transport laid down 1950

Displacement: 1,785 t light; 1,863 t standard; 2,098 t normal; 2,285 t full load

Dimensions: Length overall / water x beam x draught

333.20 ft / 328.08 ft x 43.31 ft x 12.30 ft (normal load) (101.56 m / 100.00 m x 13.20 m x 3.75 m)

Armament:

3 - 5.12" / 130 mm guns in single mounts, 67.03lbs / 30.40kg shells, 1950 Model Automatic rapid fire guns in deck mounts with hoists on centreline ends, majority forward, 1 raised mount
2 - 2.24" / 57.0 mm guns (1x2 guns), 5.65lbs / 2.56kg shells, 1950 Model Anti-aircraft guns in deck mount on centreline aft, all raised guns – superfiring
4 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1950 Model Anti-aircraft guns in deck mounts on side, evenly spread, all raised mounts
Weight of broadside 213 lbs / 97 kg
Shells per gun, main battery: 300

Armor:

Gun armor: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.39" / 10 mm -
2nd: 0.39" / 10 mm 0.39" / 10 mm -
3rd: 0.39" / 10 mm - -

Conning tower: 0.98" / 25 mm

Machinery:

Oil fired boilers, steam turbines, Geared drive, 2 shafts, 5,415 shp / 4,040 Kw = 20.00 kts
Range 6,000nm at 15.00 kts
Bunker at max displacement = 422 tons

Complement: 154 - 201

Cost: £0.838 million / $3.354 million

Distribution of weights at normal displacement:

Armament: 32 tons, 1.5 %
Armor: 12 tons, 0.6 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 8 tons, 0.4 %
- Armor Deck: 0 tons, 0.0 %
- Conning Tower: 3 tons, 0.2 %
Machinery: 130 tons, 6.2 %
Hull, fittings & equipment: 962 tons, 45.8 %
Fuel, ammunition & stores: 313 tons, 14.9 %
Miscellaneous weights: 650 tons, 31.0 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 4,338 lbs / 1,967 Kg = 64.7 x 5.1 " / 130 mm shells or 1.4 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 1.7 ft / 0.5 m
Roll period: 13.9 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.18
Seaboat quality (Average = 1.00): 1.82

Hull form characteristics:

Hull has a flush deck and transom stern
Block coefficient: 0.420
Length to Beam Ratio: 7.58 : 1
'Natural speed' for length: 21.41 kts
Power going to wave formation at top speed: 46 %
Trim (Max stability = 0, Max steadiness = 100): 33
Bow angle (Positive = bow angles forward): 18.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 15.75 ft / 4.80 m
- Forecastle (35 %): 15.75 ft / 4.80 m
- Mid (50 %): 12.47 ft / 3.80 m
- Quarterdeck (25 %): 12.47 ft / 3.80 m
- Stern: 12.47 ft / 3.80 m
- Average freeboard: 13.86 ft / 4.23 m
Ship tends to be wet forward

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 66.9 %
- Above water (accommodation/working, high = better): 148.8 %
Waterplane Area: 9,196 Square feet or 854 Square meters
Displacement factor (Displacement / loading): 179 %
Structure weight / hull surface area: 69 lbs/sq ft or 338 Kg/sq meter
Hull strength (Relative):
- Cross-sectional: 1.08
- Longitudinal: 2.41
- Overall: 1.17
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Breakdown of miscellaneous weight:

50 tons for radar and electronics
450 tons for quarters for a troop contingent of 225
100 tons for cargo space for equipment and supplies
50 tons for additional cranes and boats

For the rivers, or the sea?

Quoted from "Brockpaine"

For the rivers, or the sea?

She'll be built for ocean service, though I suppose she could ascend the Amazon. At the moment, I see no need to send heavy warships there. The Atlanteans and Colombians might be miffed if I did.

Looks a handy design.
Is she foremost a gunboat or a transport? I'm trying to visualise the design, the gun layout sounds very gunboaty but I'm assuming there is a cargo hold and derricks and stuff for the cargo space?

Quoted from "Hood"

Looks a handy design.
Is she foremost a gunboat or a transport? I'm trying to visualise the design, the gun layout sounds very gunboaty but I'm assuming there is a cargo hold and derricks and stuff for the cargo space?

The inspiration for this class of vessel is the Mexican Durango-class gunboats of the 1930s. here Tonnages and dimensions differ, there are side doors as well as cranes. Chiefly to move troops to places where they are wanted and aimed to impress.

Kind of how I visualised them, yes they will be impressive and offer good fire support too.
I might have been tempted to swap the 57mm for smaller cannon for good shore-raking fire if this were my design but overall it looks pretty well suited.

They're some nice ships, I think. Chile did something similar in 1949 (...which I haven't posted yet, shame on me) but those are based on the Crosley-class ships.