WesWorld

Small diesel-engine coastal escorts for general service.

Maranon, Peruvian Corvette laid down 1945

Displacement: 512 t light; 537 t standard; 669 t normal; 774 t full load

Dimensions: Length overall / water x beam x draught

239.07 ft / 229.66 ft x 24.61 ft x 8.20 ft (normal load) [72.87 m / 70.00 m x 7.50 m x 2.50 m]

Armament:

2 - 3.46" / 88.0 mm guns in single mounts, 20.79lbs / 9.43kg shells, 1945 Model Anti-aircraft guns in deck mounts on centreline ends, evenly spread
2 - 1.46" / 37.0 mm guns (1x2 guns), 1.55lbs / 0.70kg shells, 1945 Model Anti-aircraft guns in deck mount on centreline amidships, all raised guns - superfiring
8 - 0.79" / 20.0 mm guns (4x2 guns), 0.24lbs / 0.11kg shells, 1945 Model Anti-aircraft guns in deck mounts on side, evenly spread
Weight of broadside 47 lbs / 21 kg
Shells per gun, main battery: 400

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: 0.98" / 25 mm

Machinery:

Diesel Internal combustion motors, Geared drive, 2 shafts, 7,541 shp / 5,626 Kw = 25.00 kts
Range 3,800nm at 18.00 kts
Bunker at max displacement = 237 tons

Complement: 65 - 85

Cost: £0.342 million / $1.368 million

Distribution of weights at normal displacement:

Armament: 6 tons, 0.9 %
Armour: 5 tons, 0.8 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 4 tons, 0.6 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 2 tons, 0.2 %
Machinery: 190 tons, 28.5 %
Hull, fittings & equipment: 260 tons, 39.0 %
Fuel, ammunition & stores: 157 tons, 23.4 %
Miscellaneous weights: 50 tons, 7.5 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship): 784 lbs / 356 Kg = 37.7 x 3.5 " / 88 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.15
Metacentric height 0.8 ft / 0.2 m
Roll period: 11.6 seconds
Steadiness - As gun platform (Average = 50 %): 74 %
- Recoil effect (Restricted arc if above 1.00): 0.18
Seaboat quality (Average = 1.00): 1.85

Hull form characteristics:

Hull has rise forward of midbreak and transom stern
Block coefficient: 0.505
Length to Beam Ratio: 9.33: 1
'Natural speed' for length: 17.38 kts
Power going to wave formation at top speed: 67 %
Trim (Max stability = 0, Max steadiness = 100): 40
Bow angle (Positive = bow angles forward): 18.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 18.86 ft / 5.75 m
- Forecastle (20 %): 18.04 ft / 5.50 m
- Mid (50 %): 18.04 ft / 5.50 m (11.48 ft / 3.50 m aft of break)
- Quarterdeck (20 %): 11.48 ft / 3.50 m
- Stern: 11.48 ft / 3.50 m
- Average freeboard: 14.83 ft / 4.52 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 108.7 %
- Above water (accommodation/working, high = better): 170.2 %
Waterplane Area: 3,934 Square feet or 365 Square metres
Displacement factor (Displacement / loading): 138 %
Structure weight / hull surface area: 26 lbs/sq ft or 128 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.57
- Longitudinal: 7.69
- Overall: 0.74
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Breakdown of miscellaneous weight:

Anti-submarine detection equipment (ASDIC/Sonar) - 10 tons
One depth charge racks for 100 kg depth charges - 10 tons
Two depth charge projectors for 100 kg depth charges - 5 tons each - 10 tons
One hundred depth charges - 10 tons
Navigation, surface search, and air search radar- 10 tons

Seems okay to me...

Looks ok to me.