Protected Cruiser

miketr · February 07, 2011, 09:02:48 AM

Units:
Valencia (To Be Laid Down 1920 H2)
Braga (To Be Laid Down 1920 H2)
Fortaleza (To Be Laid Down 1921 H2)
Cagayan de Oro (To Be Laid Down 1921 H2)

QuotePC-1920-b, Iberia Protected Cruiser laid down 1920

Displacement:
5,999 t light; 6,275 t standard; 6,867 t normal; 7,341 t full load

Dimensions: Length overall / water x beam x draught
492.13 ft / 492.13 ft x 49.21 ft x 18.04 ft (normal load)
150.00 m / 150.00 m x 15.00 m x 5.50 m

Armament:
8 - 5.91" / 150 mm guns (4x2 guns), 102.98lbs / 46.71kg shells, 1920 Model
Breech loading guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
8 - 4.13" / 105 mm guns in single mounts, 35.32lbs / 16.02kg shells, 1920 Model
Quick firing guns in deck mounts
on side, all amidships
4 - 2.95" / 75.0 mm guns in single mounts, 12.87lbs / 5.84kg shells, 1920 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
4 - 0.49" / 12.5 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1920 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 1,158 lbs / 525 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: 2.95" / 75 mm 374.02 ft / 114.00 m 13.12 ft / 4.00 m
Ends: Unarmoured
Main Belt covers 117 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.95" / 75 mm 1.97" / 50 mm 2.95" / 75 mm
2nd: 1.97" / 50 mm - -
3rd: 0.98" / 25 mm - -

- Armour deck: 1.57" / 40 mm, Conning tower: 4.72" / 120 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 3 shafts, 58,000 shp / 43,268 Kw = 30.13 kts
Range 12,500nm at 10.00 kts
Bunker at max displacement = 1,066 tons

Complement:
376 - 490

Cost:
£1.455 million / $5.819 million

Distribution of weights at normal displacement:
Armament: 145 tons, 2.1 %
Armour: 1,239 tons, 18.0 %
- Belts: 591 tons, 8.6 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 119 tons, 1.7 %
- Armour Deck: 492 tons, 7.2 %
- Conning Tower: 37 tons, 0.5 %
Machinery: 2,028 tons, 29.5 %
Hull, fittings & equipment: 2,381 tons, 34.7 %
Fuel, ammunition & stores: 868 tons, 12.6 %
Miscellaneous weights: 207 tons, 3.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
6,154 lbs / 2,792 Kg = 59.8 x 5.9 " / 150 mm shells or 1.0 torpedoes
Stability (Unstable if below 1.00): 1.22
Metacentric height 2.5 ft / 0.8 m
Roll period: 13.1 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.43
Seaboat quality (Average = 1.00): 1.01

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.550
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 22.18 kts
Power going to wave formation at top speed: 59 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21.33 ft / 6.50 m
- Forecastle (20 %): 18.04 ft / 5.50 m
- Mid (50 %): 17.22 ft / 5.25 m
- Quarterdeck (15 %): 15.58 ft / 4.75 m
- Stern: 14.76 ft / 4.50 m
- Average freeboard: 17.18 ft / 5.24 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 116.1 %
- Above water (accommodation/working, high = better): 120.5 %
Waterplane Area: 16,902 Square feet or 1,570 Square metres
Displacement factor (Displacement / loading): 103 %
Structure weight / hull surface area: 85 lbs/sq ft or 413 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.46
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent

100 tons - 1912 FC
12 tons - Torpedo's
95 tons - construction reserve

Protected Cruiser

miketr