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1

Wednesday, September 4th 2013, 4:04pm

Iberia: Mercurio Redux

Apparently my computer has recently decided it can operate SS2.1 after all.

Here's a take on the Mercurios, which Mac did in SS3. I've had to make a few tweaks:

-Reduced main battery shells from 150 to 100
-Changed 130mm guns from turret/barbette to mount/hoist
-Reduced Misc. weight from 500 to 400 t
-Reduced beam slightly.
-Raised freeboard slightly, except for the stem, which was decreased so it was less extreme.

The end result is pretty close to the essential parts of Mac's work. What do you think?

Mercurio laid down 1937

Displacement:
38,976 t light; 40,917 t standard; 44,315 t normal; 47,033 t full load

Dimensions: Length overall / water x beam x draught
807.16 ft / 787.40 ft x 100.07 ft x 32.81 ft (normal load)
246.02 m / 240.00 m x 30.50 m x 10.00 m

Armament:
9 - 14.96" / 380 mm guns (3x3 guns), 1,873.93lbs / 850.00kg shells, 1937 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
2 - 5.12" / 130 mm guns (1x2 guns), 67.62lbs / 30.67kg shells, 1937 Model
Dual purpose guns in a deck mount with hoist
on centreline aft, all raised guns - superfiring
20 - 5.12" / 130 mm guns (10x2 guns), 67.62lbs / 30.67kg shells, 1937 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships, 4 raised mounts - superfiring
36 - 2.24" / 57.0 mm guns (18x2 guns), 5.65lbs / 2.56kg shells, 1937 Model
Dual purpose guns in deck mounts with hoists
on side, evenly spread, all raised mounts
48 - 0.98" / 25.0 mm guns (24x2 guns), 0.48lbs / 0.22kg shells, 1937 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 18,579 lbs / 8,427 kg
Shells per gun, main battery: 100

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 14.8" / 375 mm 492.13 ft / 150.00 m 16.40 ft / 5.00 m
Ends: Unarmoured
Main Belt covers 96 % of normal length

- Torpedo Bulkhead:
1.97" / 50 mm 524.93 ft / 160.00 m 29.53 ft / 9.00 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 15.7" / 400 mm 7.87" / 200 mm 13.8" / 350 mm
2nd: 2.95" / 75 mm 1.38" / 35 mm 1.97" / 50 mm
3rd: 2.95" / 75 mm 1.38" / 35 mm 1.97" / 50 mm
4th: 0.79" / 20 mm 0.79" / 20 mm 0.79" / 20 mm
5th: 0.79" / 20 mm 0.79" / 20 mm -

- Armour deck: 6.30" / 160 mm, Conning tower: 7.87" / 200 mm

Machinery:
Oil fired boilers, steam turbines,
Electric motors, 4 shafts, 137,215 shp / 102,363 Kw = 30.00 kts
Range 12,000nm at 15.00 kts
Bunker at max displacement = 6,116 tons

Complement:
1,526 - 1,985

Cost:
£19.949 million / $79.797 million

Distribution of weights at normal displacement:
Armament: 2,096 tons, 4.7 %
Armour: 16,542 tons, 37.3 %
- Belts: 5,138 tons, 11.6 %
- Torpedo bulkhead: 1,129 tons, 2.5 %
- Armament: 3,063 tons, 6.9 %
- Armour Deck: 6,999 tons, 15.8 %
- Conning Tower: 212 tons, 0.5 %
Machinery: 3,803 tons, 8.6 %
Hull, fittings & equipment: 16,135 tons, 36.4 %
Fuel, ammunition & stores: 5,339 tons, 12.0 %
Miscellaneous weights: 400 tons, 0.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
63,322 lbs / 28,723 Kg = 37.8 x 15.0 " / 380 mm shells or 9.7 torpedoes
Stability (Unstable if below 1.00): 1.11
Metacentric height 6.1 ft / 1.9 m
Roll period: 17.0 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.65
Seaboat quality (Average = 1.00): 1.00

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.600
Length to Beam Ratio: 7.87 : 1
'Natural speed' for length: 32.29 kts
Power going to wave formation at top speed: 52 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 28.54 ft / 8.70 m
- Forecastle (20 %): 21.65 ft / 6.60 m
- Mid (50 %): 20.01 ft / 6.10 m
- Quarterdeck (15 %): 18.37 ft / 5.60 m
- Stern: 18.37 ft / 5.60 m
- Average freeboard: 20.61 ft / 6.28 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 81.5 %
- Above water (accommodation/working, high = better): 149.6 %
Waterplane Area: 60,060 Square feet or 5,580 Square metres
Displacement factor (Displacement / loading): 107 %
Structure weight / hull surface area: 197 lbs/sq ft or 961 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.98
- Longitudinal: 1.16
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent

2

Wednesday, September 4th 2013, 4:11pm

It looks reasonable to me, though I am no expert.

3

Wednesday, September 4th 2013, 4:22pm

Gets my thumbs up. Looks a good conversion to me.

HoOmAn

Keeper of the Sacred Block Coefficient

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4

Wednesday, September 4th 2013, 11:45pm

Yeah, looks like a decent design. Quite heavy AA suit...