Parthian Ships 1928 +

[TacCovert4]

The Aztec also had the problem of the early fleet disaster, so you're rebuilding a base.

I like what you did with the lighter units, putting their speed above most of the Roman, and building some asymmetrical units in the Razees.
For the heavies I think I would have conceded speed to the Roman, and aimed for a speed point to choose/refuse combat with the Mayans.
Granted that was complicated by not knowing quite what their fleet was....

But with the Romans building very big fast ships, they can't afford as many, which helps offset their BP advantage.
Most of their ships are 340L45s, they only have the new 410L45 on 4 vessels. 172,500 tons of vessels... but 32 big guns.
My 2 Kaliferns with 32 guns take 76,000 tons- but are to slow for your purposes.
But 3 of my 10x390L46 @26knots would take 114,000 tons or 66% of the BP and field 30 big guns.
Slow it to 25 knots, boost the armor to the 380/140 of the first version, and you'd have something the Romans have no
good range for, and can choose to fight or not fight vs. the Mayans.
Hmm some tinkering and I can manage 3T4 @24knots and 38k. Hmm, that's just fast enough to chose engagement/not with the Byzantines...
However it's interesting to see folks different takes on these challenges.

The big fast BB types will probably continue.  But at no point am I prevented from building another monarch analog.  And with advancements, I can get a very heavily armored ship on 27,000t and still get sufficient speed to minimally outstrip the mayans.

I don't intend to, but I can.  Among other things I have in the works. 

[Kaiser Kirk]

I've been looking at ships in the mid 20k ranges for quite some time, I call them the Dahae class and 'Heavy Armored Cruisers' but really they match up versus the various battlecruisers.

Currently, Parthia thinks she has 8 'first line' Armored cruisers -
the 4 Zemaka - named after storm wind types - (18,500, 8x255L47, 200/65, 31knts) and the Asbara (14750, 8x255L47, 195/85, 27knts)
The Asbara were just rearmed with the 255L47, which is more powerful than the old 255L50. There is a desire to re-engine them, but that was skipped for now.
The 255L47 is thought capable of penetrating a 150mm belt at 18km. Basically if they can see a cruiser, they can kill the cruiser.

Japanese- and others- BCs are a bit of a problem, as there will be a period where they can penetrate my belts, but I can't penetrate theirs.
However at least with the IJN, their decks are pretty poor, they can't close the distance, and I have a higher rate of fire.
Actually Fox made a big 'no-no' error on many of his ships, extending the forecastle area instead of the foredeck, so his armor decks don't cover all his citadel.
Saves weight but very poor protection scheme, which I've actually warned about a couple different times over the years. 

Conceptually Parthian scouts would operate in 4 shells - aircraft, cruiser, AC, Fast BB - with each able to fall back on the next if running into serious problems.
Such fast targets would be very hard to close to torpedo range alive if you are a DD.
While aerial strikes may make that problematic, I tend towards thick decks to counter shell splinters and longer hits, so most ships are current-bomb-resistant.
and at least the Zemaka have a TDS.  If I re-engine the Asbara they will too.  For both those classes, if a strike of bombers comes in while they are at cruise, the expectation is to start a constant turn and deploy the torpedo nets. Aerial torps should lack the weight to punch through nets easily.
Overall I need more AA guns, but I'm busy developing a new batch...

Anyhow, so the next several designs will be either follow-on to the Zemaka at 18500 or 19500tons,
OR ...scaling up to a Dahae.

[Kaiser Kirk]

So...what sort of AA mount do you think I need to develop to deploy this ?

I'm thinking it's 'pair of twins'  so a True-Quad ?

[The Rock Doctor]

I'm thinking two-row quad with power assist.

[TacCovert4]

I've been doing prep work for a 37mm gatling AA

[Kaiser Kirk]

So the first of the 3 Armored Cruisers is nearly a repeat of the Zemaka slightly upgraded, at 18,500 tons.

The main difference is changing from a protective deck + main belt, with the belt raised above the deck to protect against plunging shells,
to an armored deck set higher up.
This provides better protection vs. plunging fire, where this ship plans on fighting.

The side protection is less than the Belt + PD of the Zemakas.
This is somewhat offset by an intent to stay at mid-long range,
and the outsloping of the main deck, plus bringing the TDS up behind it as a splinter belt.

The TDS is quite robust, requiring a large beam to accommodate. 


Struggling with the right name for the new vessels.
In this case, Centaurs - the original Horse Archers - seem fairly Parthian.

Nemasp 'Sagitarius- Centaur', Parthian Armored Cruiser laid down 1928

Displacement:
   18,500 t light; 19,581 t standard; 21,342 t normal; 22,751 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (621.03 ft / 613.52 ft) x 78.74 ft (Bulges 82.02 ft) x (29.53 / 31.06 ft)
   (189.29 m / 187.00 m) x 24.00 m (Bulges 25.00 m)  x (9.00 / 9.47 m)

Armament:
      8 - 10.04" / 255 mm 47.0 cal guns - 599.66lbs / 272.00kg shells, 162 per gun
     Breech loading guns in turret on barbette mounts, 1928 Model
     2 x 4-gun mounts on centreline ends, evenly spread
      12 - 5.12" / 130 mm 50.0 cal guns - 70.55lbs / 32.00kg shells, 200 per gun
     Quick firing guns in deck and hoist mounts, 1928 Model
     2 x 2-gun mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
     4 x 2-gun mounts on side ends, evenly spread
      12 - 3.54" / 90.0 mm 54.0 cal guns - 24.25lbs / 11.00kg shells, 600 per gun
     Anti-air guns in deck mounts, 1928 Model
     6 x 2-gun mounts on side ends, majority forward
      6 raised mounts
      8 - 2.24" / 57.0 mm 60.0 cal guns - 6.61lbs / 3.00kg shells, 900 per gun
     Anti-air guns in deck mounts, 1928 Model
     4 x Twin mounts on sides, evenly spread
      4 raised mounts
      16 - 0.59" / 15.0 mm 70.0 cal guns - 0.11lbs / 0.05kg shells, 5,000 per gun
     Anti-air guns in deck mounts, 1928 Model
     8 x Single mounts on sides, evenly spread
      8 double raised mounts
      Weight of broadside 5,990 lbs / 2,717 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   7.09" / 180 mm   441.73 ft / 134.64 m   16.44 ft / 5.01 m
   Ends:   1.57" / 40 mm   171.75 ft / 52.35 m   16.44 ft / 5.01 m
     Main Belt covers 111 % of normal length
     Main Belt inclined -12.00 degrees (positive = in)

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      2.24" / 57 mm   441.73 ft / 134.64 m   27.82 ft / 8.48 m
   Beam between torpedo bulkheads 59.06 ft / 18.00 m

   - Hull Bulges:
      0.35" / 9 mm   490.81 ft / 149.60 m   22.97 ft / 7.00 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   10.0" / 255 mm   4.72" / 120 mm      7.87" / 200 mm
   2nd:   2.95" / 75 mm   1.38" / 35 mm      2.56" / 65 mm
   3rd:   0.24" / 6 mm         -               -
   4th:   0.31" / 8 mm         -               -
   5th:   0.31" / 8 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 2.76" / 70 mm
   Forecastle: 1.57" / 40 mm  Quarter deck: 2.76" / 70 mm

   - Conning towers: Forward 7.09" / 180 mm, Aft 1.57" / 40 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 121,854 shp / 90,903 Kw = 31.00 kts
   Range 10,000nm at 14.00 kts
   Bunker at max displacement = 3,171 tons

Complement:
   882 - 1,147

Cost:
   £6.494 million / $25.975 million

Distribution of weights at normal displacement:
   Armament: 1,341 tons, 6.3 %
      - Guns: 1,341 tons, 6.3 %
   Armour: 6,008 tons, 28.2 %
      - Belts: 2,284 tons, 10.7 %
      - Torpedo bulkhead: 1,020 tons, 4.8 %
      - Bulges: 148 tons, 0.7 %
      - Armament: 794 tons, 3.7 %
      - Armour Deck: 1,619 tons, 7.6 %
      - Conning Towers: 144 tons, 0.7 %
   Machinery: 3,794 tons, 17.8 %
   Hull, fittings & equipment: 6,807 tons, 31.9 %
   Fuel, ammunition & stores: 2,842 tons, 13.3 %
   Miscellaneous weights: 550 tons, 2.6 %
      - Hull below water: 98 tons
      - Bulge void weights: 60 tons
      - Hull above water: 57 tons
      - On freeboard deck: 125 tons
      - Above deck: 210 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     25,744 lbs / 11,677 Kg = 50.9 x 10.0 " / 255 mm shells or 4.1 torpedoes
   Stability (Unstable if below 1.00): 1.09
   Metacentric height 4.1 ft / 1.3 m
   Roll period: 16.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.55
   Seaboat quality  (Average = 1.00): 1.03

Hull form characteristics:
   Hull has rise forward of midbreak,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.503 / 0.510
   Length to Beam Ratio: 7.48 : 1
   'Natural speed' for length: 24.77 kts
   Power going to wave formation at top speed: 58 %
   Trim (Max stability = 0, Max steadiness = 100): 68
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: -6.56 ft / -2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   15.00 %,  28.05 ft / 8.55 m,  26.41 ft / 8.05 m
      - Forward deck:   26.00 %,  26.41 ft / 8.05 m,  26.41 ft / 8.05 m
      - Aft deck:   46.00 %,  18.21 ft / 5.55 m,  18.21 ft / 5.55 m
      - Quarter deck:   13.00 %,  18.21 ft / 5.55 m,  19.69 ft / 6.00 m
      - Average freeboard:      21.77 ft / 6.63 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 110.3 %
      - Above water (accommodation/working, high = better): 147.5 %
   Waterplane Area: 32,267 Square feet or 2,998 Square metres
   Displacement factor (Displacement / loading): 112 %
   Structure weight / hull surface area: 147 lbs/sq ft or 715 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.93
      - Longitudinal: 1.79
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

Nem-asp is 'Saggitarius' which is also Centaur.
Centaur is nemasp...but centaurs were 'horse archers'... and thematically seems to fit Asbara which basically is "Knight".

This thins and outslopes the armor belt slightly more, and moves the armor deck to the top of the belt. This leaves the top of the TDS at the maindeck level.

Weaponry
The 255mm L 47 gun with the heavy shell was developed to take advantage of new artillery research.


Secondary
The 120mm guns allow 6 guns forward/aft and 8 guns on either beam.


Armor :
The Belt is from 3.10 to -1.8m
A distance of 4.9, but is inclined 12deg so needs 5.01
(4.9 / cos(10) = 5.009= 5.01.)

The 65mm deck will defeat splinters up to 420mm.

TDS
The vessel is designed for Depth of TDS, which drives the Beam.
With 17.4m across the amidships, and 3.5deep on each side, there is a large volume which
should not be flooded, minimizing list from Torpedo strikes

The 3.5m deep side protection has a 19mm STS bulkhead seperating the compartment
in two, and a 38mm (laminated 2x19mm) bulkhead backing the system.

The compartments are an outer 2m wide, and an inner 1.3m (4.3ft) wide.
The outer filled with oil fuel, the inner with air. This is expected to
minimize list if the outer is breached, as fuel and seawater will be exchanged. The
fuel is expected to disperse and broaden the concussion on the 19mm  bulkhead.
That bulkhead is chosen for maximizing deformation ability and toughness.
While also being splinterproof.

The 38mm (2x19mm) provides a backup which will stop any splinters, but is also
able to deform.

The 1.3m (4.3ft) void space between it and the 19mm will allow Damage control
access for leaks, or counterflooding compartment on the far side of the vessel.

MISC :
60- Reserve wt.

AD :
135 - FC
25t - LR radio
25t - Searchlight Tower (NF)
25t - Hulesmeyer station keeper
10t - SR dedicated A/C radio

OD :
5t - Paravanes
40t - 2x Scout Floatplanes
50t - 2x Fighter Floatplanes
20t - Hangers
10t - 2x Gunpoweder CAT

HAW :
19t - CO2 Air compressor A/C
38t - Imp Fire ext.

HBW :
38t - Pumps
30t - AV gas & munitions stores in doublewall tanks
5t - additional fire suppression for AvGas
21+4t : 500kw Aux Diesel Gen + fuel

Decks : 2.45m for most
8.05m : Forecastle
5.55m : Weather
3.10m : Battery,  Top Belt, Armor Deck
0.65m : Main  Deck, Top TDS
-1.8m  : Lower Edge Protective Deck, 2nd Deck
            -2.00m : Bottom Main belt
-4.25  : 1st Deck
-7.20  : Engineering
-7.83  : Keel, Double bottom

[Kaiser Kirk]

The next AC is a slightly larger version of the preceeding ship.

The Nightwind Class, is +1000 tons, +8 x 57mm....
The belt covers a more compact area , but  +50mm belt armor and +15mm deck armor.
It also has about 1000nm more range.
and +12% more floatation.
I think the extra tonnage is probably worth it.

Wadsab, Parthian Armored Cruiser laid down 1928

Displacement:
   19,500 t light; 20,649 t standard; 22,750 t normal; 24,431 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (620.81 ft / 613.52 ft) x 78.74 ft (Bulges 82.02 ft) x (29.86 / 31.63 ft)
   (189.22 m / 187.00 m) x 24.00 m (Bulges 25.00 m)  x (9.10 / 9.64 m)

Armament:
      8 - 10.04" / 255 mm 47.0 cal guns - 599.66lbs / 272.00kg shells, 162 per gun
     Breech loading guns in turret on barbette mounts, 1928 Model
     2 x 4-gun mounts on centreline ends, evenly spread
      12 - 5.12" / 130 mm 50.0 cal guns - 70.55lbs / 32.00kg shells, 282 per gun
     Quick firing guns in deck and hoist mounts, 1928 Model
     2 x 2-gun mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
     4 x 2-gun mounts on side ends, evenly spread
      12 - 3.54" / 90.0 mm 50.0 cal guns - 24.25lbs / 11.00kg shells, 500 per gun
     Anti-air guns in deck mounts, 1928 Model
     6 x 2-gun mounts on sides, evenly spread
      6 raised mounts
      16 - 2.24" / 57.0 mm 60.0 cal guns - 6.19lbs / 2.81kg shells, 800 per gun
     Anti-air guns in deck mounts, 1928 Model
     8 x 2-gun mounts on sides, evenly spread
      8 raised mounts
      16 - 0.59" / 15.0 mm 70.0 cal guns - 0.11lbs / 0.05kg shells, 5,000 per gun
     Machine guns in deck mounts, 1928 Model
     8 x Twin mounts on sides, evenly spread
      8 double raised mounts
      Weight of broadside 6,036 lbs / 2,738 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   9.06" / 230 mm   429.46 ft / 130.90 m   12.76 ft / 3.89 m
   Ends:   1.38" / 35 mm   184.02 ft / 56.09 m   12.76 ft / 3.89 m
     Main Belt covers 108 % of normal length
     Main Belt inclined -12.00 degrees (positive = in)

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      2.24" / 57 mm   429.46 ft / 130.90 m   31.96 ft / 9.74 m
   Beam between torpedo bulkheads 59.06 ft / 18.00 m

   - Hull Bulges:
      0.35" / 9 mm   436.15 ft / 132.94 m   22.97 ft / 7.00 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   10.0" / 255 mm   4.33" / 110 mm      8.27" / 210 mm
   2nd:   2.95" / 75 mm   1.38" / 35 mm      2.56" / 65 mm
   3rd:   0.31" / 8 mm         -               -
   4th:   0.31" / 8 mm         -               -
   5th:   0.31" / 8 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 3.35" / 85 mm
   Forecastle: 1.38" / 35 mm  Quarter deck: 3.35" / 85 mm

   - Conning towers: Forward 10.04" / 255 mm, Aft 2.56" / 65 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 128,492 shp / 95,855 Kw = 31.00 kts
   Range 8,466nm at 16.00 kts
   Bunker at max displacement = 3,782 tons

Complement:
   926 - 1,204

Cost:
   £6.746 million / $26.983 million

Distribution of weights at normal displacement:
   Armament: 1,351 tons, 5.9 %
      - Guns: 1,351 tons, 5.9 %
   Armour: 6,457 tons, 28.4 %
      - Belts: 2,180 tons, 9.6 %
      - Torpedo bulkhead: 1,139 tons, 5.0 %
      - Bulges: 131 tons, 0.6 %
      - Armament: 830 tons, 3.6 %
      - Armour Deck: 1,958 tons, 8.6 %
      - Conning Towers: 218 tons, 1.0 %
   Machinery: 4,000 tons, 17.6 %
   Hull, fittings & equipment: 7,054 tons, 31.0 %
   Fuel, ammunition & stores: 3,250 tons, 14.3 %
   Miscellaneous weights: 638 tons, 2.8 %
      - Hull below water: 84 tons
      - Bulge void weights: 170 tons
      - Hull above water: 38 tons
      - On freeboard deck: 125 tons
      - Above deck: 221 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     28,480 lbs / 12,918 Kg = 56.3 x 10.0 " / 255 mm shells or 4.4 torpedoes
   Stability (Unstable if below 1.00): 1.08
   Metacentric height 4.1 ft / 1.2 m
   Roll period: 17.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.60
   Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
   Hull has low quarterdeck ,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.530 / 0.537
   Length to Beam Ratio: 7.48 : 1
   'Natural speed' for length: 24.77 kts
   Power going to wave formation at top speed: 59 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: -6.56 ft / -2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  27.23 ft / 8.30 m,  24.77 ft / 7.55 m
      - Forward deck:   30.00 %,  24.77 ft / 7.55 m,  22.31 ft / 6.80 m
      - Aft deck:   40.00 %,  22.31 ft / 6.80 m,  22.31 ft / 6.80 m
      - Quarter deck:   10.00 %,  14.11 ft / 4.30 m,  14.11 ft / 4.30 m
      - Average freeboard:      22.55 ft / 6.87 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 107.7 %
      - Above water (accommodation/working, high = better): 155.4 %
   Waterplane Area: 33,090 Square feet or 3,074 Square metres
   Displacement factor (Displacement / loading): 113 %
   Structure weight / hull surface area: 147 lbs/sq ft or 718 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.93
      - Longitudinal: 1.84
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

The 'Winter Wind' class is adjudged a success,
and there is desire to continue the class.

Wad-girag 'Whirlwind'
Wad-Sab   'Nightwind'

I can come up with a couple other winds.
Heck maybe 'Blazingwind' and 'Radiantwind'...

Things to work on.

Some changes are made to account for the
1928 vs. 1920 laydown.

These swell the ship by over 1000 tons,
Extending the forecastle aft,
and creating a floatplane handling area on the quarterdeck.

Main guns remain the 4-gun 255L47 fore and aft.
With a much higher rate of fire than a 305+, they can maintain their own shell ladders.

A secondary of two-gun 130mm is provided, with
6 bearing fore/aft and 8 on broadside.

The main belt is increased  to
compensate for the elimination of the protective deck
and adoption of an armored deck.
This also helps close the performance gap with the Japanese BCs,

The TDS still rises to seal to the bottom of the armored deck, serving also to catch splinters and ejecta from the belt.

The protective deck is changed to an armored deck,
and both belt and deck thickened.

This places it at 1.8above WL, to -2m BWL
outsloped at 12 degrees and capped by the armor deck
3.8/cos(12) = 3.8848 = 3.89

The large amount of upper hull that is unprotected is seen as
part of the 'all or nothing' concept.


MISC :
170- Reserve wt.

AD :
136 - FC
25 - Searchlight tower (NF)
25 - LR radio
25t - Station keeping Hulesmeyer
10t - Dedicated AC channel

OD :
5t - Paravanes
40t - 2x Scout floatplanes
50t - 2x Fighter floatplanes
10t - 2x gunpowder Cat  (port, starboard)
20t - Hanger


HAW :
19t - CO2 Air compressor A/C
19t - Imp Fire ext.

HBW :
19t - Pumps
10t - imp fire ext for AV stores
5t - AV ammo vault.
5t - AV double wall tank
20t - AV Gas
21+4t : 500kw Aux Diesel Gen + Fuel.

Decks : 2.5m for most
6.80m : Weather deck
4.30m : Fantail deck, Floatplane recovery
1.80m : 70mm Armor deck, Top main belt, top main belt
-1.7m  :  2nd Deck
            -2.00m : Bottom Main belt
-4.2  : 1st Deck
-7.20  : Engineering
-7.94  : Keel, Double bottom

[Kaiser Kirk]

The next step up is the Dahae 'Heavy Armored Cruiser' class, which costs a cruiser more to build over the two AC designs.
But in terms of build programs, this actually costs less per HY because it takes longer.
The Nightwind would be 4.75bp/HY for 5 HY, while this would be 4.083/HY

The reason it comes up for consideration is there are a fair number of armored cruisers out there, and the Byzantines have both
a number of those, and of these 6 gun heavily armored 2nd rate battleships. Those are a challenge for my 10" ACs,
but these 13" guns should do nicely. I wouldn't want to build a ship just for that, but this is fairly mutlirole.

This is slower then the Zemakas, but still fast enough to catch & kill  the IJN BCs and lots of older cruisers, while there's nothing that can catch and kill it reliably.

hmm, I need to get consistent about an aux power plant. I forgot one in the misc weight. But its got 120 reserve, so I can make it work.

Dahae L, Parthian Heavy Armored Cruiser laid down 1928

Displacement:
   24,500 t light; 26,045 t standard; 28,607 t normal; 30,657 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (584.72 ft / 577.43 ft) x 95.14 ft (Bulges 101.71 ft) x (31.17 / 33.04 ft)
   (178.22 m / 176.00 m) x 29.00 m (Bulges 31.00 m)  x (9.50 / 10.07 m)

Armament:
      8 - 13.11" / 333 mm 43.0 cal guns - 1,333.80lbs / 605.00kg shells, 130 per gun
     Breech loading guns in turret on barbette mounts, 1928 Model
     2 x 2-gun mounts on centreline ends, evenly spread
      12 - 4.72" / 120 mm 43.0 cal guns - 55.12lbs / 25.00kg shells, 250 per gun
     Quick firing guns in deck and hoist mounts, 1928 Model
     4 x 2-gun mounts on side ends, evenly spread
     2 x 2-gun mounts on centreline ends, evenly spread
      2 double raised mounts
      16 - 3.54" / 90.0 mm 50.0 cal guns - 24.25lbs / 11.00kg shells, 500 per gun
     Anti-air guns in deck and hoist mounts, 1928 Model
     8 x 2-gun mounts on sides, evenly spread
      8 raised mounts
      16 - 0.59" / 15.0 mm 70.0 cal guns - 0.11lbs / 0.05kg shells, 3,000 per gun
     Machine guns in deck mounts, 1928 Model
     6 x Twin mounts on sides, evenly spread
      6 raised mounts
     2 x Twin mounts on centreline ends, evenly spread
      2 double raised mounts
      Weight of broadside 11,722 lbs / 5,317 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   10.0" / 255 mm   392.65 ft / 119.68 m   12.76 ft / 3.89 m
   Ends:   1.57" / 40 mm   184.74 ft / 56.31 m   12.76 ft / 3.89 m
     Main Belt covers 105 % of normal length
     Main Belt inclined -12.00 degrees (positive = in)

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      2.24" / 57 mm   392.65 ft / 119.68 m   35.40 ft / 10.79 m
   Beam between torpedo bulkheads 68.90 ft / 21.00 m

   - Hull Bulges:
      0.35" / 9 mm   399.21 ft / 121.68 m   24.61 ft / 7.50 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   10.0" / 255 mm   6.50" / 165 mm      8.66" / 220 mm
   2nd:   1.97" / 50 mm   1.57" / 40 mm      1.97" / 50 mm
   3rd:   1.38" / 35 mm   0.98" / 25 mm      0.98" / 25 mm
   4th:   0.31" / 8 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 3.94" / 100 mm
   Forecastle: 1.57" / 40 mm  Quarter deck: 3.94" / 100 mm

   - Conning towers: Forward 10.04" / 255 mm, Aft 1.57" / 40 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 3 shafts, 122,248 shp / 91,197 Kw = 29.00 kts
   Range 8,878nm at 16.00 kts
   Bunker at max displacement = 4,612 tons

Complement:
   1,099 - 1,429

Cost:
   £8.680 million / $34.718 million

Distribution of weights at normal displacement:
   Armament: 2,067 tons, 7.2 %
      - Guns: 2,067 tons, 7.2 %
   Armour: 8,069 tons, 28.2 %
      - Belts: 2,310 tons, 8.1 %
      - Torpedo bulkhead: 1,154 tons, 4.0 %
      - Bulges: 129 tons, 0.5 %
      - Armament: 1,583 tons, 5.5 %
      - Armour Deck: 2,658 tons, 9.3 %
      - Conning Towers: 234 tons, 0.8 %
   Machinery: 3,806 tons, 13.3 %
   Hull, fittings & equipment: 9,769 tons, 34.2 %
   Fuel, ammunition & stores: 4,107 tons, 14.4 %
   Miscellaneous weights: 788 tons, 2.8 %
      - Hull below water: 211 tons
      - Bulge void weights: 120 tons
      - Hull above water: 50 tons
      - On freeboard deck: 115 tons
      - Above deck: 292 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     40,335 lbs / 18,296 Kg = 35.8 x 13.1 " / 333 mm shells or 6.9 torpedoes
   Stability (Unstable if below 1.00): 1.18
   Metacentric height 6.3 ft / 1.9 m
   Roll period: 17.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.57
   Seaboat quality  (Average = 1.00): 1.04

Hull form characteristics:
   Hull has rise forward of midbreak,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.547 / 0.553
   Length to Beam Ratio: 5.68 : 1
   'Natural speed' for length: 24.03 kts
   Power going to wave formation at top speed: 62 %
   Trim (Max stability = 0, Max steadiness = 100): 67
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: -3.28 ft / -1.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  27.23 ft / 8.30 m,  27.23 ft / 8.30 m
      - Forward deck:   30.00 %,  27.23 ft / 8.30 m,  27.23 ft / 8.30 m
      - Aft deck:   38.00 %,  22.31 ft / 6.80 m,  22.31 ft / 6.80 m
      - Quarter deck:   12.00 %,  22.31 ft / 6.80 m,  22.31 ft / 6.80 m
      - Average freeboard:      24.77 ft / 7.55 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 102.5 %
      - Above water (accommodation/working, high = better): 162.2 %
   Waterplane Area: 38,234 Square feet or 3,552 Square metres
   Displacement factor (Displacement / loading): 115 %
   Structure weight / hull surface area: 186 lbs/sq ft or 910 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.90
      - Longitudinal: 2.48
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

'Dahae' - Refers to the ancient Dahea confederation, which lived between the Caspian and Aral Seas.
The Parni tribe, which became the Parthians, were a member. Others are debated but Xanthioi, Pissouroi. The relationship with the massagetae, and saka is not clear. They were all Iranic peoples and Scythians, but they may have been descended or co-existed.

They are maybe mentioned in Zorastorian texts as Danjha, Ariia, Turiia, Sarima, and Sainu.

Getting faster, or 1.2 seakeeping is more expensive than needed.

Using the rule of thumb of +2-3 knots needed to catch a ship...there's not much out there this would have to fear.

Designed to be able to oppose a range of Byzantine vessels, fast enough to choose terms with most Roman ships, and 2 knots over the IJN Battlecruisers. Each of these opponents they can likely defeat in 1:1 combat.

The older battlecruisers have  similar belt armor and main guns, but lesser deck armor, and as long as the battle can be kept at 16+ km, should be beatable.

Guns
The new 333L43 is mounted fore and aft

Belt : From 1.8 to -2m (3.8), Sloped 12% outboard
3.8/cos (12) = 3.89

TDS :
Exterior bulge for standoff distance -2 to -9.5
TDS set at 3.3m from hull, twinned 19mm plates.
Total depth 4.3m.

Misc Wt :
207t  - FC
25t - Searchlight Tower
25t - LR Radio
25t - Hulesmeyer
10t - SR Radio Air Control
0t  -  SR Radio

5t - Paravanes
100t - 4x Floatplane Fighters or Scouts (Normally 2 +2 )
10t - 2x Gunpowder Cat

25t - CO2 Air Compressor AC
25t - Enhanced Fire Suppression

25t - Enhanced Pumps
176t - Torpedo nets
1+5+2 - Double wall tank (1) + AVGAS (5) + munitions (2)
2t  Enhanced Fire Suppression for AC supplies

Decks
8.3 - Weather
6.8 - 
4.3 - 
1.8 - Main Armor Deck, top TDS, Top Main Belt
-0.7 - Deck
        - 2.0 Bottom Main Belt.
-3.2 - Deck
-7.7- Engineering
-8.91  - Double Bottom

[TacCovert4]

See, I had abandoned the 11in razee in favor of the 9in razee due to weight issues.  But with stuff like this running around,  I'm going to have to debate between an 11in and a 14in razee in the mid 30s.

Maybe I'll do a new 11 or 12in gun.....and put it in a quad turret.

[Kaiser Kirk]

   But with stuff like this running around...

Well the Nightwind style follows the 4 Zemaka and 4 Asbara while the Byzantines have a whole mess of 10" ACs of their own.
The Dahae is something of a jump for the Parthians, but would unlock options against both Byzantines and IJN.

The Byzantine Gagus and [/i]Irgirlu[/i] have long been difficult for the Parthians to figure a match for.  We basically figured they
were in the same category as the Europa in that our cruisers would have to fall back on the Stormbringers.
That almost caused the Zemaka class to either be armed with 300L41s , or the Dahae to be built long ago with 345L45s originally meant for the Tiamat class.

Hmm, maybe this forms a reason to go for the Dahae over the Nightwind, talking about it, there is a need for both, but .....

[The Rock Doctor]

I assume Dahae's meant to have quads?

[Kaiser Kirk]

I assume Dahae's meant to have quads?

Well...this version was supposed to....
Prior versions had 4T2 arrangements.
I apparently goofed the toggle.

So, that was the 'L' version.

This is the 'M' version.

Springsharp must have figured there was 4 deck level mounts , as swapping from 2gun to 4 gun gained me comp hull - about .04
I then reworked the freeboard and wound up adding 2m in length, eliminating the break amidships, which saved some comp hull too.
I upgunned the secondary from 120L43 to 130L50, and plan on the free basic refit to install the 90L54s.

Guns were re-arranged in a stack fore/aft.
            90
      130
333
Increased the Conning tower and Main gun face armor to 280mm, and barbettes to 230mm.
Main belt outslope was increased from -12 to -15 degrees.
Added a 50mm box around the magazines.
Fire control weight went up.
Added an Aux Diesel elec generator driving a small 5th propeller. Good for 8knots in harbor, or 1005kw standby power. 

Overall it seems like a worthwhile rework.
Normally a ship this far along in the design process I don't find that many things to improve.
...which makes me wonder what I messed up.... but I did free a lot of comp hull, guess it works.

Dahae M, Parthian Heavy Armored Cruiser laid down 1928

Displacement:
   24,500 t light; 26,072 t standard; 28,668 t normal; 30,744 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (590.55 ft / 583.99 ft) x 95.14 ft (Bulges 101.71 ft) x (31.17 / 33.06 ft)
   (180.00 m / 178.00 m) x 29.00 m (Bulges 31.00 m)  x (9.50 / 10.08 m)

Armament:
      8 - 13.11" / 333 mm 43.0 cal guns - 1,333.80lbs / 605.00kg shells, 130 per gun
     Breech loading guns in turret on barbette mounts, 1928 Model
     2 x 4-gun mounts on centreline ends, evenly spread
      12 - 5.12" / 130 mm 50.0 cal guns - 70.55lbs / 32.00kg shells, 250 per gun
     Quick firing guns in deck and hoist mounts, 1928 Model
     4 x 2-gun mounts on side ends, evenly spread
     2 x 2-gun mounts on centreline ends, evenly spread
      2 raised mounts
      16 - 3.54" / 90.0 mm 54.0 cal guns - 24.25lbs / 11.00kg shells, 500 per gun
     Anti-air guns in deck and hoist mounts, 1928 Model
     6 x 2-gun mounts on sides, evenly spread
      6 raised mounts
     2 x 2-gun mounts on sides forward
      2 double raised mounts
      16 - 0.59" / 15.0 mm 70.0 cal guns - 0.11lbs / 0.05kg shells, 3,000 per gun
     Machine guns in deck mounts, 1928 Model
     6 x Twin mounts on sides, evenly spread
      6 raised mounts
     2 x Twin mounts on centreline ends, evenly spread
      2 double raised mounts
      Weight of broadside 11,907 lbs / 5,401 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   10.0" / 255 mm   397.11 ft / 121.04 m   12.93 ft / 3.94 m
   Ends:   1.57" / 40 mm   186.84 ft / 56.95 m   12.93 ft / 3.94 m
     Main Belt covers 105 % of normal length
     Main Belt inclined -15.00 degrees (positive = in)

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      2.24" / 57 mm   397.11 ft / 121.04 m   34.35 ft / 10.47 m
   Beam between torpedo bulkheads 68.90 ft / 21.00 m

   - Hull Bulges:
      0.35" / 9 mm   399.21 ft / 121.68 m   24.61 ft / 7.50 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   11.0" / 280 mm   6.50" / 165 mm      9.06" / 230 mm
   2nd:   1.97" / 50 mm   1.57" / 40 mm      1.97" / 50 mm
   3rd:   1.38" / 35 mm   0.98" / 25 mm      0.98" / 25 mm
   4th:   0.31" / 8 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 4.13" / 105 mm
   Forecastle: 1.57" / 40 mm  Quarter deck: 3.94" / 100 mm

   - Conning towers: Forward 11.02" / 280 mm, Aft 1.57" / 40 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 5 shafts, 121,195 shp / 90,412 Kw = 29.00 kts
   Range 9,008nm at 16.00 kts
   Bunker at max displacement = 4,672 tons

Complement:
   1,101 - 1,432

Cost:
   £8.806 million / $35.222 million

Distribution of weights at normal displacement:
   Armament: 2,173 tons, 7.6 %
      - Guns: 2,173 tons, 7.6 %
   Armour: 8,056 tons, 28.1 %
      - Belts: 2,369 tons, 8.3 %
      - Torpedo bulkhead: 1,133 tons, 4.0 %
      - Bulges: 129 tons, 0.5 %
      - Armament: 1,381 tons, 4.8 %
      - Armour Deck: 2,790 tons, 9.7 %
      - Conning Towers: 254 tons, 0.9 %
   Machinery: 3,773 tons, 13.2 %
   Hull, fittings & equipment: 9,610 tons, 33.5 %
   Fuel, ammunition & stores: 4,168 tons, 14.5 %
   Miscellaneous weights: 888 tons, 3.1 %
      - Hull below water: 280 tons
      - Bulge void weights: 120 tons
      - Hull above water: 50 tons
      - On freeboard deck: 135 tons
      - Above deck: 303 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     38,928 lbs / 17,657 Kg = 34.6 x 13.1 " / 333 mm shells or 6.7 torpedoes
   Stability (Unstable if below 1.00): 1.18
   Metacentric height 6.3 ft / 1.9 m
   Roll period: 17.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.54
   Seaboat quality  (Average = 1.00): 1.03

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.542 / 0.548
   Length to Beam Ratio: 5.74 : 1
   'Natural speed' for length: 24.17 kts
   Power going to wave formation at top speed: 61 %
   Trim (Max stability = 0, Max steadiness = 100): 68
   Bow angle (Positive = bow angles forward): 13.00 degrees
   Stern overhang: -3.28 ft / -1.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  27.23 ft / 8.30 m,  25.59 ft / 7.80 m
      - Forward deck:   30.00 %,  25.59 ft / 7.80 m,  22.31 ft / 6.80 m
      - Aft deck:   38.00 %,  22.31 ft / 6.80 m,  22.31 ft / 6.80 m
      - Quarter deck:   12.00 %,  22.31 ft / 6.80 m,  23.29 ft / 7.10 m
      - Average freeboard:      23.65 ft / 7.21 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 103.7 %
      - Above water (accommodation/working, high = better): 153.4 %
   Waterplane Area: 38,488 Square feet or 3,576 Square metres
   Displacement factor (Displacement / loading): 114 %
   Structure weight / hull surface area: 185 lbs/sq ft or 904 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.91
      - Longitudinal: 2.32
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform


Belt : From 1.8 to -2m (3.8), Sloped 15% outboard
3.8/ cos (15) = 3.934 = 3.94

Deck Armor :
40/100/100mm Deck 2676
50mm box over Magazines : 112t
Total : 2788t

Modeled as : 40/104.8/100 : 2790t


TDS : Total 5m deep, 57mm STS
Exterior bulge for standoff distance -2 to -9.5
Bulge 1m deep
TDS set 4m inside of hull,
1.5m liquid, 1.0m void,19mm STS, 1.5m liquid, twinned 19mm STS plates,
Total depth 4.3m.

Range :
8nm of range is designated diesel for the Aux Gen.
Range is 9000nm * 1.15 (geared) = 10,350nm

Misc Wt :
Reserve : 120

AD
218t  - FC
25t - Searchlight Tower (NF)
25t - LR Radio
25t - Hulesmeyer prox detector
10t - SR Radio Air Control
0t  -  SR Radio

OD
5t - Paravanes
100t - 4x Floatplane Fighters or Scouts (Normally 2 +2 )
10t - 2x Gunpowder Cat
20t - Hanger

HAW
25t - CO2 Air Compressor AC
25t - Enhanced Fire Suppression

HBW
25t :  Enhanced Pumps
178t :  Torpedo nets
12t : 1+9+2 - Double wall tank (1) + AVGAS (5) + munitions (2)
2t :  Enhanced Fire Suppression for AC supplies

Aux :
65.1t    :   (42  x 1.55) Aux Diesel-Electric 1005kw Gen. Drives 5th (center) shaft at up to 8knots.
8nm of fuel is Diesel. This is 4tons, or ~13440gal.

Decks

6.8 - Weather deck
4.3 - 
1.8 - Main Armor Deck, top TDS, Top Main Belt
-0.7 - Deck
        - 2.0 Bottom Main Belt.
-3.2 - Deck
-7.7- Engineering
-8.67  - Double Bottom

[Kaiser Kirk]

Watching the 49ers-Steelers game, I decided to try to decide between the Wirozag XVI and Wirozag XVII and Stormbringer O.
They are actually derived from two different lineages of vessels, but are 28kts/8guns, 27kts/9guns and 26nts/10guns.

The 26knot speed still works for the original purpose, 27 has some modest appeal, but 28 doesn't seem to buy enough.
Simple stats the vessels look - to me - like this

		Broadside		Simple				Magazine
		ROF	Speed	Belt	Deck	Mag Box	TDS	Horizontal	Vert		Float	Torp
XVII	8x 390	16	28	360	140	75	57	480	177.5		68997	11.8
XVI	9x 390	17.1	27	350	130	75	57	469	167.5		62271	11.2
P	10x 390	19.4	26	350	135	50	57	456	160		62372	11.5

The ROF basis rates a 2-gun at 2rpg, a 3-gun as -10% for the extra barrel/feed issues, so 1.9RPG. 
There's also the 'optimal' of a 4 shell splash ladder - 2 short, 1 on, 1 over. 
Three splashes were not 'as good'.
As optics got better and radar came in, it became less important...but we are not there yet.

For the Parthians that makes 8 guns the 'minimum'.
To guard against loading drill problems resulting in a barrel not being ready, 5 guns was felt by the Brits as optimal.
As mountings got better, that became a flexible need, which you see in the 6-gun Battlecruisers.
But Jackie Fisher also had some design ideas that seemed flawed to others.

While looking at the 'O', I realize when I adapted that version from 365->390, I hadn't redone the tapered belt calculations for the 4.5m hieght vs 5m.
which dropped the height to 4.23 from 4.7...go figure.
That allowed me to tinker with a lot of little things,

The biggest change was while I had reduced the tapered belt from 5m 380 to 4.5m 350, I was still figuring the volume based on the 380mm, and dropping that to 350mm dropped the needed height from 4.7 to 4.23.  This allowed me to increase deck armor by +5mm, 2nd mount 'other' +5mm, and primary barbette +10mm. The box around the magazines went from 35mm to 50mm.

90L50AA → 90L54AA to reflect free refit prior to completion, reset in twin mounts
Adjust FC wt.
+13t for 244KW Aux Diesel Generator
+2nm range, assigning last 18nm range to Diesel
-18t Reserve weight.
Bow from 13% to 12%
reworked text descriptions of armor to match the O version.
Shaved .2m off end belt height. Reduced con armor to 380mm, as it's curved doesn't need to be 420mm. Same reason my turret faces are thicker while barbettes thinner than belt armor.

Our basic rule is you can't build something unless it's posted first.
Minor changes, esp to misc weight allocation, or say planning on the free refit...I don't think need repostng.
But all of this moves hundreds of tons around which means I probably need to post the revised vessel as the 'P'.

I think the decision is down to this, or the XVII

Stormbringer II P, Parthian Battleship laid down 1928

Displacement:
   38,000 t light; 40,568 t standard; 43,024 t normal; 44,989 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (623.07 ft / 616.80 ft) x 114.83 ft (Bulges 124.67 ft) x (31.33 / 32.63 ft)
   (189.91 m / 188.00 m) x 35.00 m (Bulges 38.00 m)  x (9.55 / 9.95 m)

Armament:
      10 - 15.35" / 390 mm 46.0 cal guns - 1,915.82lbs / 869.00kg shells, 134 per gun
     Breech loading guns in turret on barbette mounts, 1928 Model
     2 x 3-gun mounts on centreline ends, evenly spread
     2 x 2-gun mounts on centreline ends, evenly spread
      2 raised mounts
      16 - 5.12" / 130 mm 50.0 cal guns - 70.55lbs / 32.00kg shells, 230 per gun
     Quick firing guns in deck and hoist mounts, 1928 Model
     8 x 2-gun mounts on sides, evenly spread
      16 - 3.54" / 90.0 mm 54.0 cal guns - 24.25lbs / 11.00kg shells, 500 per gun
     Anti-air guns in deck and hoist mounts, 1928 Model
     6 x 2-gun mounts on sides, evenly spread
      6 raised mounts
     2 x 2-gun mounts on centreline ends, evenly spread
      2 double raised mounts
      8 - 2.24" / 57.0 mm 60.0 cal guns - 6.61lbs / 3.00kg shells, 800 per gun
     Anti-air guns in deck and hoist mounts, 1928 Model
     4 x 2-gun mounts on side ends, evenly spread
      4 double raised mounts
      16 - 0.59" / 15.0 mm 70.0 cal guns - 0.11lbs / 0.05kg shells, 5,000 per gun
     Machine guns in deck mounts, 1928 Model
     8 x Twin mounts on sides, evenly spread
      8 double raised mounts
      Weight of broadside 20,730 lbs / 9,403 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13.8" / 350 mm   400.92 ft / 122.20 m   13.88 ft / 4.23 m
   Ends:   1.57" / 40 mm   215.85 ft / 65.79 m   14.76 ft / 4.50 m
     Main Belt covers 100 % of normal length
     Main Belt inclined -12.00 degrees (positive = in)

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      2.24" / 57 mm   400.92 ft / 122.20 m   34.74 ft / 10.59 m
   Beam between torpedo bulkheads 78.74 ft / 24.00 m

   - Hull Bulges:
      0.35" / 9 mm   400.92 ft / 122.20 m   21.49 ft / 6.55 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   17.1" / 435 mm   7.09" / 180 mm      13.4" / 340 mm
   2nd:   1.97" / 50 mm   1.57" / 40 mm      1.57" / 40 mm
   3rd:   0.59" / 15 mm   0.31" / 8 mm      0.31" / 8 mm
   4th:   0.31" / 8 mm         -               -
   5th:   0.31" / 8 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 5.50" / 140 mm
   Forecastle: 1.57" / 40 mm  Quarter deck: 5.31" / 135 mm

   - Conning towers: Forward 14.96" / 380 mm, Aft 1.57" / 40 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 104,439 shp / 77,912 Kw = 26.00 kts
   Range 8,680nm at 14.00 kts
   Bunker at max displacement = 4,422 tons

Complement:
   1,493 - 1,941

Cost:
   £14.265 million / $57.058 million

Distribution of weights at normal displacement:
   Armament: 4,324 tons, 10.0 %
      - Guns: 4,324 tons, 10.0 %
   Armour: 14,762 tons, 34.3 %
      - Belts: 3,638 tons, 8.5 %
      - Torpedo bulkhead: 1,157 tons, 2.7 %
      - Bulges: 113 tons, 0.3 %
      - Armament: 4,341 tons, 10.1 %
      - Armour Deck: 5,077 tons, 11.8 %
      - Conning Towers: 437 tons, 1.0 %
   Machinery: 3,252 tons, 7.6 %
   Hull, fittings & equipment: 14,590 tons, 33.9 %
   Fuel, ammunition & stores: 5,024 tons, 11.7 %
   Miscellaneous weights: 1,073 tons, 2.5 %
      - Hull below water: 254 tons
      - Bulge void weights: 155 tons
      - Hull above water: 76 tons
      - On freeboard deck: 70 tons
      - Above deck: 518 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     62,372 lbs / 28,291 Kg = 34.5 x 15.4 " / 390 mm shells or 11.5 torpedoes
   Stability (Unstable if below 1.00): 1.13
   Metacentric height 7.8 ft / 2.4 m
   Roll period: 18.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.55
   Seaboat quality  (Average = 1.00): 1.04

Hull form characteristics:
   Hull has rise forward of midbreak,
     a ram bow and a round stern
   Block coefficient (normal/deep): 0.625 / 0.628
   Length to Beam Ratio: 4.95 : 1
   'Natural speed' for length: 24.84 kts
   Power going to wave formation at top speed: 58 %
   Trim (Max stability = 0, Max steadiness = 100): 67
   Bow angle (Positive = bow angles forward): 12.00 degrees
   Stern overhang: -3.28 ft / -1.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  29.53 ft / 9.00 m,  29.53 ft / 9.00 m
      - Forward deck:   25.00 %,  29.53 ft / 9.00 m,  29.53 ft / 9.00 m
      - Aft deck:   40.00 %,  21.33 ft / 6.50 m,  21.33 ft / 6.50 m
      - Quarter deck:   15.00 %,  21.33 ft / 6.50 m,  22.31 ft / 6.80 m
      - Average freeboard:      25.09 ft / 7.65 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 99.2 %
      - Above water (accommodation/working, high = better): 165.6 %
   Waterplane Area: 53,021 Square feet or 4,926 Square metres
   Displacement factor (Displacement / loading): 105 %
   Structure weight / hull surface area: 225 lbs/sq ft or 1,100 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.92
      - Longitudinal: 1.95
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform


Step 1
The bet covers from 1.5m to -3m.
The lower portion of the belt tapers.
The upper 2.0m is a uniform 350mm, extending 0.5m below WL.
the lower 2.5m tapers from 350mm down to 230mm.
The bulge extends from the lower edge of the belt to the keel.
The TDS rises behind the belt and seals to the armor deck, adding
57mm behind it.

Mathwise that means there are 3 sections.
               |        | 
               |        |  A ) Upper, 2000mm (2.0m) x 350mm
                \  |    |   
                  \|    |  C) Lower back , 2500 (2.5m) x 230mm
B) Wedge 1/2 B x H :
B = 2.5m = 2500
H = 350-230 = 120
B = 2500/2 * 120= 150000

A) = 700,000
B) = 150,000
C) = 575,000

SubTotal : 1,425,000
Modeled as average 350mm thickness = /350
Total : 4071.428= 4.08m
 
Main  Belt is  outsloped by 15%.

Step 2 Outsloping
Overall it is 4.08m high. which is "A" or adjacent

COS 15 = A/H
H* Cos 15 = A
H = A/Cos 15

Which gives 4.2239 or 4.23 as the height.

4.7 wt : 3845
4.23 wt : 3461
384 difference

End Belts are not outsloped,

Deck Armor
Deck Armored is modeled as two parts
A 40/135/135 main armored deck : 4928 tons
and a 50mm box around the magazines : 148 tons
TOTAL : 5076

To model that, the deck thickness is shown as
40/ 139.7 /135
Which weighs 5077t

Which means vertical is a 130mm deck with a 35mm splinter box over the magazines.

Like most 'all or nothing' the Forecastle and Quarterdeck sections
are set up as protective decks, with the End belts extending from +1.5 above (level with crown) to -3m below, keeping the outer shell free of splinter holes, and effectively reinforcing the area around any large shell hole.

TDS
Raised to the underside of the Armor deck at 1.5m above waterline. Serves as internal splinter belt.

TDS : 
9mm mild hull || 1.5m Bulge ||9mm mild hull||
1.5m liquid ||9mm mild||, 1m void ||9mm mild||, 1.5m liquid || armored (2x19=38mm)||,1.5m  Dam control/ flooding ||( 19mm Armored )||

Depth : 1.5m exterior, 4m interior to main bulkhead, 1.5m to second bulkhead. Total :7m, 57mm STS steel


150t Reserve Wt

AD
433t  Fire Control
25t    LR Radio
25t    Searchlight Tower (NF)
25t    Hulesmeyer prox detector
10t    SR Radio for AC
  0t SR Radio


5t : Paravanes
25t +5t : Fighter/Scout floatplane + Gunpowder Cat
25t +5t : Fighter/Scout floatplane + Gunpowder Cat
10t : Hanger
5t : Fire Ext for hanger.

HAW
38t Additional fire suppresion
38t CO2 Air conditioning

HBW
38t   Extra pumps
188t torpedo nets
10t : (1+9) 1t double wall tanks 9t AVGAS+Aviation supplies
5t : Fire ext for Avgas.
13t : Aux Diesel Generator, 10x1.3=13t, 244kw
        Last 30nm range = Diesel fuel


Decks
+6.5   Weather Deck
+4.00  Battery Deck
+1.5 Armor Deck 130mm , top of TDS.
-1.0   3rd Deck
          -3.0 bottom main belt , top bulge
-3.5  2nd Deck
-8.0   Engineering
-9.09 Double Bottom

[The Rock Doctor]

If 26 knots works for you, it seems like the Parthian way to go.

[TacCovert4]

I would concur.  26kts is firmly a medium speed, and probably the top of the efficiency curve before you start paying heavily for engines.