Aztec Ship Designs 1921-1924

[TacCovert4]

I did some reconfiguring work.  I think this is a much better ship for the job, same size, but with a lot of things moved around and some reconfiguring.  Now she's more of a multi-role salvage and naval base ship, with the ability to do minesweeping, sea tug work, dredging/harbor maintenance, or firefighting/damage control to include divers and other specialists that a smaller vessel might not have in any number.

[TacCovert4]

Crab, Aztec Salvage Ship laid down 1922

Displacement:
   895 t light; 920 t standard; 1,022 t normal; 1,103 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (164.04 ft / 164.04 ft) x 39.37 ft x (7.38 / 7.91 ft)
   (50.00 m / 50.00 m) x 12.00 m  x (2.25 / 2.41 m)

Armament:
      1 - 2.76" / 70.0 mm 50.0 cal gun - 11.09lbs / 5.03kg shells, 300 per gun
     Anti-air gun in deck mount, 1922 Model
     1 x Single mount on centreline, aft deck forward
      1 raised mount aft
      6 - 1.18" / 30.0 mm 50.0 cal guns - 0.86lbs / 0.39kg shells, 1,000 per gun
     Anti-air guns in deck mounts, 1922 Model
     6 x Single mounts on sides, aft evenly spread
      4 - 0.47" / 12.0 mm 70.0 cal guns - 0.07lbs / 0.03kg shells, 1,500 per gun
     Machine guns in deck mounts, 1922 Model
     2 x Twin mounts on sides, forward deck aft
      2 raised mounts
      Weight of broadside 17 lbs / 7 kg

Armour:
   - Conning towers: Forward 0.79" / 20 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 2 shafts, 1,636 shp / 1,221 Kw = 14.00 kts
   Range 6,000nm at 10.00 kts
   Bunker at max displacement = 183 tons

Complement:
   89 - 117

Cost:
   £0.110 million / $0.439 million

Distribution of weights at normal displacement:
   Armament: 5 tons, 0.4 %
      - Guns: 5 tons, 0.4 %
   Armour: 2 tons, 0.2 %
      - Conning Tower: 2 tons, 0.2 %
   Machinery: 56 tons, 5.4 %
   Hull, fittings & equipment: 276 tons, 27.0 %
   Fuel, ammunition & stores: 127 tons, 12.4 %
   Miscellaneous weights: 557 tons, 54.5 %
      - Hull below water: 219 tons
      - Hull void weights: 4 tons
      - Hull above water: 94 tons
      - On freeboard deck: 210 tons
      - Above deck: 30 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2,939 lbs / 1,333 Kg = 280.9 x 2.8 " / 70 mm shells or 1.4 torpedoes
   Stability (Unstable if below 1.00): 1.52
   Metacentric height 2.5 ft / 0.8 m
   Roll period: 10.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.01
   Seaboat quality  (Average = 1.00): 1.20

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.750 / 0.756
   Length to Beam Ratio: 4.17 : 1
   'Natural speed' for length: 12.81 kts
   Power going to wave formation at top speed: 60 %
   Trim (Max stability = 0, Max steadiness = 100): 58
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  10.33 ft / 3.15 m,  10.33 ft / 3.15 m
      - Forward deck:   30.00 %,  10.33 ft / 3.15 m,  9.84 ft / 3.00 m
      - Aft deck:   35.00 %,  9.84 ft / 3.00 m,  9.84 ft / 3.00 m
      - Quarter deck:   15.00 %,  9.84 ft / 3.00 m,  9.84 ft / 3.00 m
      - Average freeboard:      10.01 ft / 3.05 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 53.5 %
      - Above water (accommodation/working, high = better): 115.3 %
   Waterplane Area: 5,410 Square feet or 503 Square metres
   Displacement factor (Displacement / loading): 150 %
   Structure weight / hull surface area: 40 lbs/sq ft or 196 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.89
      - Longitudinal: 2.61
      - Overall: 1.00
   Excellent machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

100t - Additional Engine Weight for Towing
39t - Electric Drives
50t - Strengthened Bulkheads
30t - Firefighting/DC Pumps

10t - Damage Control Locker
9t - Dive Locker and Air Pumps
10t - Space for 5 Man Engineering/Dive Team
65t - Workshop


20t - Firefighting Hoses and Equipment
100t - Salvage/Dredging Crane (40t Crane w/ dredging bucket and hoisting attachments)
50t - Minesweeping Equipment
10t - Towing Bollards
30t - Towing Winch, cables, and equipment

1t - 1918 FC
25t - LR Wireless
4t - Work Lights

4t-Void-Crash Void for pushing Vessels

[TacCovert4]

Hammerhead, Aztec Corvette laid down 1924

Displacement:
   6,854 t light; 7,099 t standard; 7,914 t normal; 8,565 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (516.89 ft / 508.53 ft) x 52.49 ft x (18.86 / 20.09 ft)
   (157.55 m / 155.00 m) x 16.00 m  x (5.75 / 6.12 m)

Armament:
      10 - 5.12" / 130 mm 50.0 cal guns - 70.97lbs / 32.19kg shells, 200 per gun
     Quick firing guns in deck and hoist mounts, 1924 Model
     4 x Twin mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
     1 x Twin mount on centreline, forward deck centre
      1 double raised mount
      2 - 2.76" / 70.0 mm 50.0 cal guns - 11.08lbs / 5.03kg shells, 300 per gun
     Anti-air guns in deck mounts, 1924 Model
     2 x Single mounts on centreline, forward deck aft
      8 - 1.18" / 30.0 mm 50.0 cal guns - 0.87lbs / 0.40kg shells, 1,000 per gun
     Anti-air guns in deck and hoist mounts, 1924 Model
     4 x Twin mounts on sides, evenly spread
      16 - 0.47" / 12.0 mm 70.0 cal guns - 0.06lbs / 0.03kg shells, 1,500 per gun
     Machine guns in deck mounts, 1924 Model
     8 x Single mounts on sides, evenly spread
      Weight of broadside 740 lbs / 336 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   1.57" / 40 mm   393.70 ft / 120.00 m   11.48 ft / 3.50 m
   Ends:   1.18" / 30 mm   114.83 ft / 35.00 m   11.48 ft / 3.50 m
     Main Belt covers 119 % of normal length
     Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      0.98" / 25 mm   393.70 ft / 120.00 m   18.86 ft / 5.75 m
   Beam between torpedo bulkheads 39.37 ft / 12.00 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   2.36" / 60 mm   1.38" / 35 mm      2.36" / 60 mm
   3rd:         -            -         0.79" / 20 mm

   - Box over machinery & magazines:
   1.57" / 40 mm
   Forecastle: 0.79" / 20 mm  Quarter deck: 0.79" / 20 mm

   - Conning towers: Forward 2.36" / 60 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 80,482 shp / 60,040 Kw = 32.00 kts
   Range 8,000nm at 14.00 kts
   Bunker at max displacement = 1,466 tons

Complement:
   419 - 545

Cost:
   £2.129 million / $8.518 million

Distribution of weights at normal displacement:
   Armament: 179 tons, 2.3 %
      - Guns: 179 tons, 2.3 %
   Armour: 1,481 tons, 18.7 %
      - Belts: 343 tons, 4.3 %
      - Torpedo bulkhead: 270 tons, 3.4 %
      - Armament: 58 tons, 0.7 %
      - Armour Deck: 788 tons, 10.0 %
      - Conning Tower: 20 tons, 0.3 %
   Machinery: 2,651 tons, 33.5 %
   Hull, fittings & equipment: 2,450 tons, 31.0 %
   Fuel, ammunition & stores: 1,060 tons, 13.4 %
   Miscellaneous weights: 93 tons, 1.2 %
      - On freeboard deck: 24 tons
      - Above deck: 69 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     6,236 lbs / 2,829 Kg = 93.0 x 5.1 " / 130 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.12
   Metacentric height 2.4 ft / 0.7 m
   Roll period: 14.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.41
   Seaboat quality  (Average = 1.00): 1.06

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.550 / 0.559
   Length to Beam Ratio: 9.69 : 1
   'Natural speed' for length: 22.55 kts
   Power going to wave formation at top speed: 62 %
   Trim (Max stability = 0, Max steadiness = 100): 66
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  22.97 ft / 7.00 m,  21.33 ft / 6.50 m
      - Forward deck:   30.00 %,  21.33 ft / 6.50 m,  18.86 ft / 5.75 m
      - Aft deck:   35.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Quarter deck:   15.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Average freeboard:      19.86 ft / 6.05 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 157.6 %
      - Above water (accommodation/working, high = better): 164.6 %
   Waterplane Area: 18,630 Square feet or 1,731 Square metres
   Displacement factor (Displacement / loading): 104 %
   Structure weight / hull surface area: 78 lbs/sq ft or 382 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.84
      - Longitudinal: 1.62
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

19t - 1918 FC
25t - NF Devices
25t - LR Radio

24t - 2 x 3 x 21in HW TT on sides aft

[TacCovert4]

And yes, the magazine box instead of a traditional main armored deck is deliberate.  The magazine box, as opposed to a protected deck, has both vertical and horizontal protection without necessarily the same issues as a protected deck with exposure of the slope.  Plus, the County-class cruisers actually did this, with box protection coupled with belt protection.  I'd estimate between the two I'm getting the same protection as a 70mm belt.  And because the internal space issues in the ship aren't conducive to doing a protected or armored deck.

[TacCovert4]

And then with a few modifications.


Hammerhead, Aztec Corvette laid down 1924

Displacement:
   6,853 t light; 7,099 t standard; 7,914 t normal; 8,565 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (516.89 ft / 508.53 ft) x 52.49 ft x (18.86 / 20.09 ft)
   (157.55 m / 155.00 m) x 16.00 m  x (5.75 / 6.12 m)

Armament:
      10 - 5.12" / 130 mm 50.0 cal guns - 70.97lbs / 32.19kg shells, 200 per gun
     Quick firing guns in deck and hoist mounts, 1924 Model
     4 x Twin mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
     1 x Twin mount on centreline, forward deck centre
      1 double raised mount
      2 - 2.76" / 70.0 mm 50.0 cal guns - 11.09lbs / 5.03kg shells, 300 per gun
     Anti-air guns in deck mounts, 1924 Model
     2 x Single mounts on centreline, forward deck aft
      8 - 1.18" / 30.0 mm 50.0 cal guns - 0.86lbs / 0.39kg shells, 1,000 per gun
     Anti-air guns in deck and hoist mounts, 1924 Model
     4 x Twin mounts on sides, evenly spread
      16 - 0.47" / 12.0 mm 70.0 cal guns - 0.07lbs / 0.03kg shells, 1,500 per gun
     Machine guns in deck mounts, 1924 Model
     8 x Single mounts on sides, evenly spread
      Weight of broadside 740 lbs / 336 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   2.36" / 60 mm   393.70 ft / 120.00 m   14.76 ft / 4.50 m
   Ends:   1.18" / 30 mm   114.83 ft / 35.00 m   14.76 ft / 4.50 m
     Main Belt covers 119 % of normal length
     Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      0.98" / 25 mm   393.70 ft / 120.00 m   18.86 ft / 5.75 m
   Beam between torpedo bulkheads 42.65 ft / 13.00 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   2.36" / 60 mm   1.38" / 35 mm      2.36" / 60 mm
   3rd:         -            -         0.79" / 20 mm

   - Protected deck - single deck:
   For and Aft decks: 1.57" / 40 mm
   Forecastle: 0.79" / 20 mm  Quarter deck: 1.38" / 35 mm

   - Conning towers: Forward 2.36" / 60 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 80,482 shp / 60,040 Kw = 32.00 kts
   Range 8,000nm at 14.00 kts
   Bunker at max displacement = 1,466 tons

Complement:
   419 - 545

Cost:
   £2.129 million / $8.518 million

Distribution of weights at normal displacement:
   Armament: 179 tons, 2.3 %
      - Guns: 179 tons, 2.3 %
   Armour: 1,490 tons, 18.8 %
      - Belts: 625 tons, 7.9 %
      - Torpedo bulkhead: 270 tons, 3.4 %
      - Armament: 58 tons, 0.7 %
      - Armour Deck: 516 tons, 6.5 %
      - Conning Tower: 20 tons, 0.3 %
   Machinery: 2,651 tons, 33.5 %
   Hull, fittings & equipment: 2,440 tons, 30.8 %
   Fuel, ammunition & stores: 1,060 tons, 13.4 %
   Miscellaneous weights: 93 tons, 1.2 %
      - On freeboard deck: 24 tons
      - Above deck: 69 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     6,214 lbs / 2,819 Kg = 92.7 x 5.1 " / 130 mm shells or 1.1 torpedoes
   Stability (Unstable if below 1.00): 1.12
   Metacentric height 2.4 ft / 0.7 m
   Roll period: 14.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.41
   Seaboat quality  (Average = 1.00): 1.06

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.550 / 0.559
   Length to Beam Ratio: 9.69 : 1
   'Natural speed' for length: 22.55 kts
   Power going to wave formation at top speed: 62 %
   Trim (Max stability = 0, Max steadiness = 100): 66
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  22.97 ft / 7.00 m,  21.33 ft / 6.50 m
      - Forward deck:   30.00 %,  21.33 ft / 6.50 m,  18.86 ft / 5.75 m
      - Aft deck:   35.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Quarter deck:   15.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Average freeboard:      19.86 ft / 6.05 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 145.5 %
      - Above water (accommodation/working, high = better): 164.6 %
   Waterplane Area: 18,630 Square feet or 1,731 Square metres
   Displacement factor (Displacement / loading): 104 %
   Structure weight / hull surface area: 78 lbs/sq ft or 381 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.84
      - Longitudinal: 1.61
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

19t - 1918 FC
25t - NF Devices
25t - LR Radio

24t - 2 x 3 x 21in HW TT on sides aft

[Kaiser Kirk]

It's a ship type that I'm surprised I haven't built before.  Tugboats would be dime a dozen, but an oceangoing tug/salvage vessel that can be used to maintain shipping channels at bases, tow damaged ships, or free ships that are aground, that's useful.

Interesting concept.

Conceptually the tug/salvage aspect is handwaved as part of the assumed aux fleet.
However, as you want specific additional capabilities like a gun and minesweeping, those can't be assumed
to be in the civilian fleet.

[Kaiser Kirk]

     Main Belt covers 119 % of normal length
     Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      0.98" / 25 mm   393.70 ft / 120.00 m   18.86 ft / 5.75 m
   Beam between torpedo bulkheads 39.37 ft / 12.00 m

I do roll for where things hit, so there'd be a % dice roll for how high up the hull (from shell diving depth to freeboard) and since the belt doesn't cover, another for that.
I'd probably have to do a quick sim of the ship to figure out how much is uncovered.
Be easier if your belt covered.

The TDS will have the same problem.

As an additional consideration,
your Forecastle and QD are 20% and 15%,
which is what your armor deck calculations run off of.

So theoretically, your 40mm armor deck only covers the middle 65% (100.75m) of the hull, but your
actual citadel area extends 120m...and the actual vitals slightly beyond that.


Then ...Depth.
You have a 16m beam, and a 12m TDS.
So 4m deep, 2m on each side,
backed by a 25mm bulkhead.

That is pretty minimal bulkhead,
and the further from the hull the better.
2.5-3m seems better.

There's both the initial expansion bubble,
who's surface area and so energy/unit diminishes
rapidly with radius (depth) and the waterhammer,
which is also very depth sensitive.

Then there's 25mm, which is on the low side.

Combining both, I strongly doubt
it will stop a normal torpedo, and may not
protect vs. crits.

Now there are other reasons to have a TDS,
such as limiting mine or bomb near-miss damage.

[TacCovert4]

Yeah, the true TDS is probably just not viable within the tonnage/scope.

I had done one design with a machinery/magazine box, plus a belt......

[Kaiser Kirk]

It gets extremely difficult to fit one in.

The faster the ship, the slimmer it tends to be,
which makes it harder to provide depth,
and squeezes the engines fore/aft
meaning you need a longer belt and TDS to cover it all.

There's also an irony of how cramped the ship is seems to reflect
on how good the TDS pushes that torpedo rating.

Yours - even if the TDS holds, is still only rated for 1.1 torpedoes.
That is a very small margin.

Now, it would be extremely effective at contain leaks from near-miss bombs,
and most mine damage (as the contact mines will breach the surface, venting the explosive bubble, and moored are more distant).

I'm generally looking at light armored cruisers as my entry level for TDS,
Von Der Taan had a BC lower that 0.5, and if you look at her, very tapered towards the end, but really big midsection.

[Desertfox]

I dont put TDS on anything smaller than 10k and even then I think about it.

[TacCovert4]

It was worth the experiment.   Easy solution to most of the problems with the ship is removing the TDS.

[TacCovert4]

With the TDS removed, and adjustments made for deck and belt to fully cover magazines and engineering.

Hammerhead, Aztec Corvette laid down 1924

Displacement:
   6,196 t light; 6,427 t standard; 7,194 t normal; 7,808 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (516.89 ft / 508.53 ft) x 52.49 ft x (18.86 / 20.07 ft)
   (157.55 m / 155.00 m) x 16.00 m  x (5.75 / 6.12 m)

Armament:
      10 - 5.12" / 130 mm 50.0 cal guns - 70.97lbs / 32.19kg shells, 200 per gun
     Quick firing guns in deck and hoist mounts, 1924 Model
     4 x Twin mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
     1 x Twin mount on centreline, forward deck centre
      1 double raised mount
      2 - 2.76" / 70.0 mm 50.0 cal guns - 11.09lbs / 5.03kg shells, 300 per gun
     Anti-air guns in deck mounts, 1924 Model
     2 x Single mounts on centreline, forward deck aft
      8 - 1.18" / 30.0 mm 50.0 cal guns - 0.86lbs / 0.39kg shells, 1,000 per gun
     Anti-air guns in deck and hoist mounts, 1924 Model
     4 x Twin mounts on sides, evenly spread
      16 - 0.47" / 12.0 mm 70.0 cal guns - 0.07lbs / 0.03kg shells, 1,500 per gun
     Machine guns in deck mounts, 1924 Model
     8 x Single mounts on sides, evenly spread
      Weight of broadside 740 lbs / 336 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   2.36" / 60 mm   406.82 ft / 124.00 m   13.12 ft / 4.00 m
   Ends:   1.18" / 30 mm   101.67 ft / 30.99 m   11.48 ft / 3.50 m
     Main Belt covers 123 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   2.36" / 60 mm   1.38" / 35 mm      2.36" / 60 mm
   3rd:         -            -         0.79" / 20 mm

   - Protected deck - single deck:
   For and Aft decks: 1.57" / 40 mm
   Forecastle: 0.79" / 20 mm  Quarter deck: 1.38" / 35 mm

   - Conning towers: Forward 2.36" / 60 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 73,914 shp / 55,140 Kw = 32.00 kts
   Range 8,000nm at 14.00 kts
   Bunker at max displacement = 1,381 tons

Complement:
   389 - 507

Cost:
   £1.965 million / $7.859 million

Distribution of weights at normal displacement:
   Armament: 179 tons, 2.5 %
      - Guns: 179 tons, 2.5 %
   Armour: 1,140 tons, 15.8 %
      - Belts: 553 tons, 7.7 %
      - Armament: 58 tons, 0.8 %
      - Armour Deck: 510 tons, 7.1 %
      - Conning Tower: 19 tons, 0.3 %
   Machinery: 2,435 tons, 33.8 %
   Hull, fittings & equipment: 2,349 tons, 32.7 %
   Fuel, ammunition & stores: 998 tons, 13.9 %
   Miscellaneous weights: 93 tons, 1.3 %
      - On freeboard deck: 24 tons
      - Above deck: 69 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     5,591 lbs / 2,536 Kg = 83.4 x 5.1 " / 130 mm shells or 1.0 torpedoes
   Stability (Unstable if below 1.00): 1.12
   Metacentric height 2.4 ft / 0.7 m
   Roll period: 14.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.42
   Seaboat quality  (Average = 1.00): 1.13

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.500 / 0.510
   Length to Beam Ratio: 9.69 : 1
   'Natural speed' for length: 22.55 kts
   Power going to wave formation at top speed: 60 %
   Trim (Max stability = 0, Max steadiness = 100): 62
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   12.00 %,  22.97 ft / 7.00 m,  21.33 ft / 6.50 m
      - Forward deck:   30.00 %,  21.33 ft / 6.50 m,  18.86 ft / 5.75 m
      - Aft deck:   50.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Quarter deck:   8.00 %,  18.86 ft / 5.75 m,  18.86 ft / 5.75 m
      - Average freeboard:      19.61 ft / 5.98 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 120.2 %
      - Above water (accommodation/working, high = better): 168.3 %
   Waterplane Area: 17,786 Square feet or 1,652 Square metres
   Displacement factor (Displacement / loading): 105 %
   Structure weight / hull surface area: 78 lbs/sq ft or 382 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.83
      - Longitudinal: 1.69
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

19t - 1918 FC
25t - NF Devices
25t - LR Radio

24t - 2 x 3 x 21in HW TT on sides aft

[Jefgte]

1 x Twin mount on centreline, forward deck centre
      1 double raised mount

Is that 5th turret really useful?

[TacCovert4]

I mean, it gives a 6 gun forward firing arc.  Considering that the primary prey of this ship would be destroyers and the like, firing at angles off of broadside is going to be rather important.

[Kaiser Kirk]

Certainly there's a number of historical ships with the 3 turrets forward concept, so the concentrated mount weight should not be an issue.

Concentrated forward fire was viewed as desirable for the chase, and is the reason the Omaha had the twin 155mm, and then the double stacked casement 155mm right behind, for that 6 gun forward battery. For myself, I will be building my 3000t 130mm Omaha-esque and am debating the 180mm version or the 'Royal Neissan'- leaning towards the later as it is better protected.