Modified from a pic by AltNav
Hermosillo
Merida
Hermosillo class, Mexican (US Built) Light Cruiser laid down 1932
Hermosillo, Mexico Light Cruiser laid down 1932
Displacement:
7,528 t light; 7,830 t standard; 8,886 t normal; 9,731 t full load
Dimensions: Length overall / water x beam x draught
557.48 ft / 550.00 ft x 56.00 ft x 18.70 ft (normal load)
169.92 m / 167.64 m x 17.07 m x 5.70 m
Armament:
10 - 6.00" / 152 mm guns (5x2 guns), 108.00lbs / 48.99kg shells, 1932 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority aft
8 - 1.85" / 47.0 mm guns (4x2 guns), 3.17lbs / 1.44kg shells, 1932 Model
Anti-aircraft guns in deck mounts
on side, all amidships, 2 raised mounts - superfiring
12 - 0.50" / 12.7 mm guns (6x2 guns), 0.06lbs / 0.03kg shells, 1932 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 1,106 lbs / 502 kg
Shells per gun, main battery: 200
6 - 21.0" / 533.4 mm above water torpedoes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.00" / 102 mm 400.00 ft / 121.92 m 9.00 ft / 2.74 m
Ends: Unarmoured
Main Belt covers 112 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 4.00" / 102 mm 1.00" / 25 mm 1.00" / 25 mm
2nd: 0.50" / 13 mm - -
- Armour deck: 2.00" / 51 mm, Conning tower: 1.50" / 38 mm
Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 82,832 shp / 61,792 Kw = 32.00 kts
Range 9,000nm at 15.00 kts
Bunker at max displacement = 1,902 tons
Complement:
456 - 594
Cost:
£3.281 million / $13.125 million
Distribution of weights at normal displacement:
Armament: 138 tons, 1.6 %
Armour: 1,535 tons, 17.3 %
- Belts: 591 tons, 6.7 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 142 tons, 1.6 %
- Armour Deck: 788 tons, 8.9 %
- Conning Tower: 14 tons, 0.2 %
Machinery: 2,445 tons, 27.5 %
Hull, fittings & equipment: 3,310 tons, 37.2 %
Fuel, ammunition & stores: 1,359 tons, 15.3 %
Miscellaneous weights: 100 tons, 1.1 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
11,071 lbs / 5,022 Kg = 102.5 x 6.0 " / 152 mm shells or 1.4 torpedoes
Stability (Unstable if below 1.00): 1.19
Metacentric height 2.9 ft / 0.9 m
Roll period: 13.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.39
Seaboat quality (Average = 1.00): 1.21
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.540
Length to Beam Ratio: 9.82 : 1
'Natural speed' for length: 23.45 kts
Power going to wave formation at top speed: 59 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 14.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 30.00 ft / 9.14 m
- Forecastle (12 %): 27.00 ft / 8.23 m
- Mid (50 %): 19.00 ft / 5.79 m
- Quarterdeck (25 %): 17.00 ft / 5.18 m
- Stern: 17.00 ft / 5.18 m
- Average freeboard: 20.87 ft / 6.36 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 103.2 %
- Above water (accommodation/working, high = better): 161.8 %
Waterplane Area: 21,295 Square feet or 1,978 Square metres
Displacement factor (Displacement / loading): 116 %
Structure weight / hull surface area: 91 lbs/sq ft or 446 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.94
- Longitudinal: 1.74
- Overall: 1.00
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
Good seaboat, rides out heavy weather easily