Parthian Empire

[Kaiser Kirk]

In terms of "Capital Ships" there are several ships the Parthians have been considering. In the cases of the battleships from quite some time ago, I just couldn't lay them down before 'now' ish. Currently it seems most likely I will need to lay down the vessels but build them very slowly at first, making up for it later.

The ships include a sequence from Armored Cruiser to Large Armored Cruiser to Hybrids to Battleship.

The "Armored Cruiser" role is one they see in transition. For the past 20 years,  Armored Cruisers were expected to fight each other on equal terms, serve as independent ships on the trade routes, or serve as the strong portion of the scouting force backing the protected cruisers. The 1909 Asdar class is the last Armored cruisers they produced, and the follow on class is the question. The inability of the 15000ton Asdar class Armored Cruisers to function as the strong scouting arm is what concerns the Parthians.

The emergence of the "Large Armored Cruiser" is problematic. 
The Parthians view them as to costly to build to serve as overseas commands, or as raiders, or counter raiders. The large size means fewer can be afforded, and since tactical speed does not translate to strategic range, it would be hard to supply sufficient numbers. 

While they do not wish to expose a very large expensive vessel as a heavy scout, where damage to the 'soft ends' may rob of speed and lead to it's loss.... but if the opposition fields such, then the best way to secure the scouting force is to have such vessels.

Names :
One of the tragedies of Parthia is that most of what's known is from Greek & Roman records, while modern Iran uses the Arabic alphabet I can't read/translate or even type in.  So I use the closest English word or Anglicized versions.

Capharact or Kapharatoi are known as a Byzantine armored cavalry, equipped with bow and sword, but in fact the Parthians fielded such ages before, as discovered by the Romans when they launched the Parthian wars which led in the resounding Roman defeat at Carrhae, 53 BCE.  The name seems appropriate for the next "Armored Cruiser" class.


Scythian : The Parthians originated as a nomadic Parni tribe (a member of the Dahae confederation) of Iranian peoples,which conquered the Persian province of Parthia.
The Parmi are a modern group of Iranian peoples, look on their fierce warriors (to be) and despair !!!! :  https://en.wikipedia.org/wiki/Pamiris#/media/File:Tajik_Pamiri_children.jpg

The Scythians, Sarmatians,  Saka and Dahae were all Iranian horse archer nomads, and quite likely their female warriors are the progenitors of the Amazon legends. These names seem appropriate for "Large Armored Cruisers"

For the Battleships, two classes are being considered.
I may just build 2 of each.

Sealord or Sharur is a variant of a design that led to find Springsharp in the first place.
Here it would be to create a pair of fast ships that could reinforce the scouting wing OR serve with the main fleet. The diminished main battery in exchange for speed seems a reasonable offer.
The actual vessels will likely be named after legendary weapons such as Sharur, Zomorrodnegar,   Trishula or Kaladandra....but I'm very tempted to just name them in English [/i]Stormbringer[/i] and [/i]Mournblade[/i]

Bahamut in Dungeons and Dragons is a Dragon like Tiamat.  However in Iranian mythology, Bahamutor Balmut is a mythological sea monster/fish/whale/sea serpent/leviathan, as is Dandan and Falak, all of which I suspect have the same Indo-European root that Jormungandr came from. The last would be named Makara.  I don't care for the giant fish/whale/sea serpent concept nearly as much as a mighty dragon, so... .I'm tempted to them after the Chinese 4 Sea Dragons..... or bestow [/i]Stormbringer[/i] and [/i]Mournblade[/i] on them instead.

Armored Cruiser (Already posted above)

Click author for  Reply 173 above

Capharact : 230L43 main battery, 12000tons, 30knots  - Traditional follow on to the Asdar class, focusing on armored cruiser role.  The new 230s are able to fight existing armored cruisers, while the size is reasonable. Quite likely I try to fit a pair of these into the line up. 

Click author for Reply 174 above

Capharact : 300L41 main battery, 19000tons, 28knots  - Traditional 'one up' on the 255mm cruisers, but an expensive way to kill protective cruisers, and appears to be a poor intermediate between traditional Armored Cruiser and the big Large Armored Cruisers...especially the Byzantine ones which outgun it badly.

Large Armored Cruisers
Saka : 300L41 main battery , 25000 tons, 29knots  - 6000tons and 1 knot faster than the Capharact, it is a worse comprimise, I don't see this being built unless someone points out some fantastic trait I'm not seeing.

Sarmatian : 345L45 main battery, 28000tons, 29knots – very good mixture of speed and hitting power. Virtually the same tonnage as a Tiamat, but not able to stand in line of battle. This makes a good argument for a slightly larger vessel.

Scythian : 365L45 main battery, 32000tons, 29knots – This is a hybrid, which is 'bought' at a cost of  +4000tons, the additional belt armor promises some battleline ability, which when paired with the larger gun is attractive. This can serve as a Heavy Scout, or as the tail end of the battleline.

Battleships :

Sealord or Sharur is the line-of battle hybrid, slightly slower, but with a full belt and the full 10 guns, not 8, in a Nevada style configuration.
365L45 main battery, 34000tons, 26knots.

Bahamutor Balmut is the logical next step from Tiamat. Keep the same layout, widen the hull, and add 1 gun per turret. 365L45 main battery, 39250tons, 20knots.

I'll post the other ships either later tonight or Sunday, wanted to get the textual musing out of the way first.

[Kaiser Kirk]

Site note : While I have "All or Nothing" tech, given the recent ranges, and the continued relevance of quick-fire rounds, I continue to have upper belts, albeit thin ones due to the current capital ship combat ranges.

Bahamut, Parthian Gilgamesh laid down 1916

First ,
The Bahamut class.
I've mentioned this one off and on.
The first file is titled "1912_SDN_Baphumet" and is dated 3/26/17,
while the most recent is "1916_SDN_Baphumet_doubleFC_Electric_tapered_belt_20kts_V16"
the entire "research the tech, develop the gun, develop the turret" bit took a while.

So...been planning this one for a while, Originally I figured on 4, now likely 2 along with a pair of faster heavy ships...but still unclear on which.

I am really leaning towards a different name for them though.

Tapered Belt
Figured I'd put this part front and center.

Main Belt Tapered

The Main belt is tapered as follows.

Crown of protective deck is at +1.5m above waterline.
Bottom edge of protective deck is at -1.0m below waterline.

For 1.1m above the Crown, the Main belt tapers from 350mm to 210mm at it's upper edge.  This will intercept and stop shells "own gun shells" fired at 24000m or less (aka 23degrees or less)
For 3.5m, from the 1.5m Crown to -2m, the Main belt is 350mm.


This gives a volume of
Above Crown : 399,000mm3
Central : 1,092,000mm3

Total : 1,491,000mm3
Average : 4,260mm @ 350mm thickness


Main Belt

The 350mm main belt is backed by a 75mm slope of the protective deck.  While the 350mm belt is expected to be sufficient at ranges of 10km, the additional backing is thought to be valuable if short range fighting due to night or poor weather is to occur.

Below the 75mm protective deck is an additional 20mm splinter deck, to stop ejecta from the protective deck.
This seals to the TDS at both edges (as the TDS rises to the bottom of the protective deck). 
The below waterline areas are heavily subdivided. Much of their communications paths route up through the splinter deck and pass under the protective deck.

The Baphumet class is meant to dominate the seas.
Less than twice the displacement of a Gilgamesh class, they have twice the barrels, of a much more powerful gun.

The speed is kept to the 20knots of the other ships of the line, with the expectation that fleets will meet at points of decision, such as Aden or within the confines of the Red Sea, and speed will be of limited value. Further, it is expected that a battleline is only as fast as it's slowest vessel, so battle damage will be a swift equalizer.

Armor and torpedo defenses are on a massive scale for the period. Fire control is doubled, and housed in armored towers to ensure that the concentration of firepower is not severely hindered by a lucky hit.

A thick main belt is backed by a heavy protective deck, with the top of the torpedo bulkhead rising behind that.

Electric drive is adopted, allowing machinery to be divided up and improving torpedo resistance yet further. When the full propeller reversal allowed by Electric drive is combined with the short beamy hull, the vessel is suprisingly manueverable.

Armored Fire Control Towers :
Disclaimer : Not really needed, my presumption is that Capital Ship FC is twinned by default, and has ~35mm splinter armor, proof against  QF splinters.  This is more a factor of the Parthians being paranoid about putting so many resources into the vessel, they don't want some lucky hits to render it less effective. So a 2nd FC set, and these towers are meant to guard against that.

The 5th battery is modeled as 4 single 100/1500 mounts, double raised.
They are meant to be fore/aft and each beam.
representing 4 x 15m rangefinders mounted high and protected from shell splinters up to 420mm (70x6).  The Barbettes are armored communication shafts for damage control crews or below-deck evacuation routes.

Weaponry :

primary
The main guns are a new 365mm / 45 caliber weapon. Qualifying as a 16" class wth 5800ME , they propell their 675kg shell at 861m/s.

Combat range is expected to be 18000m or less, roughly where the whole hull of an opposing vessel is visible. The battles of 1905, 1912, and 1914 all saw ranges considerably below fire control range, and armor is provided for that eventuality.

At this time, consideration of optical rangefinding extending to the horizon and potentially slightly beyond puts a range of 24,000m as possible. At that range, the combined decks should still stop the incoming shell, and the splinter deck the splinters. Angle of fall would be ~23degrees. 

5 quad turrets are arranged in A B  Q    X Y
The forecastle is extended to 35% to include Q as on the same level as A.

Secondary
The 130mm QF is a step down from the previous 165mm , but felt capable of tracking and sinking a rapidly moving destroyer or MTB

On the main deck, 4 twin guns, one at each corner, are arranged.  These are enclosed gun mounts to enable them to be worked despite main gun blast.
When not engaging MTBs/DDs, these guns are primarily expected to fire starshell or ranging shots to establish and maintain a range ladder, using dye-bag shells.

Casements :
The Casement guns are mounted 6 per side, 4 "foreward" and 2 "aft".  The foreward guns are mounted on the weather deck level at +4m to try to raise them above the bow wave make them less wet.  The aft guns are mounted at the +1.5m level of the crown of the protective deck  Each gun has it's own internal screen of 30mm armor.


Torpedo Defense

Bulge : Rising from the keel to the bottom of the main belt is a thin-skinned bulge 1.5m thick. This

Behind the Main Belt, the turtleback of the protective deck, is the TDS which rises 1.5 m above the waterline to seal to the 75mm deck at the knucle of the downturn. This is expected to stop ejecta from the turtleback should the main belt be penetrated.

The Torpedo Bulkhead consists :
1.5m  bulge (13mm armor skin) ,
the hull plating,
1.25m  Fuel compartment,
13mm armored bulkhead,
1.25m void space
a 25mm armored bulkhead, 
followed by a 1.5m damage control corridor and an 8mm armored bulkhead to restrict flooding from any leaks. 

This makes for a 1.5m external, 3m internal depth, with an additional 1.5m warded from flooding. 
The 2x 4.5m depth internally makes the beam between bulkheads (34-9=25) 25m.


Misc Weight :
Void
100t - Reserve

AD
25t - long range radio
1340t - fire control, 2 sets (670 ea)
Note : 5th battery is meant to represent 4 splintered armored fire control positions - 2 fore/aft and 2 each beam.  The "ammo hoist" barbettes are damage control/evac routes from the deep hull area.

On Deck
75t - Admiral's quarters and flag bridge
25t - Searchlight Tower

HAW
50t - "Windmaker" CO2 Compression refrigeration for ventilation & cooling.
187t- Torpedo Nets

HBW
357t - Electric drive (true range 8194 aka 28 days)

Bahamut, Parthian Gilgamesh laid down 1916

Displacement:
   39,250 t light; 42,118 t standard; 43,971 t normal; 45,454 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (620.08 ft / 613.52 ft) x 111.55 ft (Bulges 121.39 ft) x (31.17 / 32.15 ft)
   (189.00 m / 187.00 m) x 34.00 m (Bulges 37.00 m)  x (9.50 / 9.80 m)

Armament:
      20 - 14.37" / 365 mm 45.0 cal guns - 1,488.12lbs / 675.00kg shells, 105 per gun
     Breech loading guns in turret on barbette mounts, 1916 Model
     5 x 4-gun mounts on centreline, evenly spread
      2 raised mounts
      8 - 5.12" / 130 mm 50.0 cal guns - 70.55lbs / 32.00kg shells, 300 per gun
     Quick firing guns in deck and hoist mounts, 1916 Model
     4 x 2-gun mounts on side ends, evenly spread
      12 - 5.12" / 130 mm 50.0 cal guns - 70.55lbs / 32.00kg shells, 250 per gun
     Quick firing guns in casemate mounts, 1916 Model
     8 x Single mounts on sides, forward evenly spread
      8 hull mounts in casemates- Limited use in heavy seas
     4 x Single mounts on sides, aft evenly spread
      4 hull mounts in casemates- Limited use in heavy seas
      6 - 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, 1916 Model
     4 x Single mounts on side ends, evenly spread
      4 raised mounts
     2 x Single mounts on centreline ends, evenly spread
      2 double raised mounts
      4 - 3.94" / 100 mm 150.0 cal guns - 37.79lbs / 17.14kg shells, 0 per gun
     Breech loading guns in turret on barbette mounts, 1916 Model
     4 x Single mounts on sides, evenly spread
      4 double raised mounts
      Weight of broadside 31,470 lbs / 14,275 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13.8" / 350 mm   398.79 ft / 121.55 m   14.37 ft / 4.38 m
   Ends:   1.18" / 30 mm   214.70 ft / 65.44 m   8.20 ft / 2.50 m
   Upper:   2.56" / 65 mm   333.17 ft / 101.55 m   6.30 ft / 1.92 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.81" / 46 mm   398.79 ft / 121.55 m   34.94 ft / 10.65 m
   Beam between torpedo bulkheads 82.02 ft / 25.00 m

   - Hull Bulges:
      0.51" / 13 mm   398.79 ft / 121.55 m   24.61 ft / 7.50 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   14.2" / 360 mm   7.87" / 200 mm      13.0" / 330 mm
   2nd:   2.56" / 65 mm   1.18" / 30 mm      2.56" / 65 mm
   3rd:   2.56" / 65 mm   1.18" / 30 mm      1.18" / 30 mm
   4th:   0.24" / 6 mm         -               -
   5th:   2.76" / 70 mm   2.76" / 70 mm      2.76" / 70 mm

   - Protected deck - multiple decks:
   For and Aft decks: 4.92" / 125 mm
   Forecastle: 1.18" / 30 mm  Quarter deck: 2.95" / 75 mm

   - Conning towers: Forward 13.78" / 350 mm, Aft 3.54" / 90 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 38,249 shp / 28,534 Kw = 20.00 kts
   Range 7,080nm at 12.00 kts
   Bunker at max displacement = 3,336 tons

Complement:
   1,517 - 1,973

Cost:
   £7.418 million / $29.671 million

Distribution of weights at normal displacement:
   Armament: 6,693 tons, 15.2 %
      - Guns: 6,693 tons, 15.2 %
   Armour: 14,417 tons, 32.8 %
      - Belts: 3,892 tons, 8.9 %
      - Torpedo bulkhead: 934 tons, 2.1 %
      - Bulges: 186 tons, 0.4 %
      - Armament: 4,593 tons, 10.4 %
      - Armour Deck: 4,347 tons, 9.9 %
      - Conning Towers: 465 tons, 1.1 %
   Machinery: 1,425 tons, 3.2 %
   Hull, fittings & equipment: 14,507 tons, 33.0 %
   Fuel, ammunition & stores: 4,721 tons, 10.7 %
   Miscellaneous weights: 2,209 tons, 5.0 %
      - Hull below water: 407 tons
      - Bulge void weights: 100 tons
      - Hull above water: 237 tons
      - On freeboard deck: 100 tons
      - Above deck: 1,365 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     51,480 lbs / 23,351 Kg = 34.7 x 14.4 " / 365 mm shells or 9.0 torpedoes
   Stability (Unstable if below 1.00): 1.12
   Metacentric height 7.4 ft / 2.2 m
   Roll period: 18.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.70
   Seaboat quality  (Average = 1.00): 1.23

Hull form characteristics:
   Hull has rise forward of midbreak,
     a ram bow and a round stern
   Block coefficient (normal/deep): 0.663 / 0.665
   Length to Beam Ratio: 5.05 : 1
   'Natural speed' for length: 24.77 kts
   Power going to wave formation at top speed: 44 %
   Trim (Max stability = 0, Max steadiness = 100): 57
   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 %,  23.79 ft / 7.25 m,  23.79 ft / 7.25 m
      - Forward deck:   35.00 %,  23.79 ft / 7.25 m,  21.33 ft / 6.50 m
      - Aft deck:   30.00 %,  13.12 ft / 4.00 m,  13.12 ft / 4.00 m
      - Quarter deck:   15.00 %,  13.12 ft / 4.00 m,  13.94 ft / 4.25 m
      - Average freeboard:      18.62 ft / 5.68 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 99.8 %
      - Above water (accommodation/working, high = better): 121.3 %
   Waterplane Area: 53,053 Square feet or 4,929 Square metres
   Displacement factor (Displacement / loading): 92 %
   Structure weight / hull surface area: 251 lbs/sq ft or 1,225 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.48
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

[Kaiser Kirk]

The Imhullu is a 'bonus' design.  I've been tinkering with a 13-gun Conte di Cavour type vessel, and happened to finish while watching the NFC playoff game.

It also has the Tapered Belt :
Tapered belt from +2.7 to -2.5
2.7 to 1.5     200 -> 350     : 240,000+90,000
1.5 to -1.5      350                 : 1,050,000
-1.5 to -2.5   350-> 200     : 200,000+ 75,000
total : 1,655,000mm3
350mm ave = 4.73



Imhullu, Parthian Battleship laid down 1916

Displacement:
   33,999 t light; 37,347 t standard; 40,032 t normal; 42,180 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (620.33 ft / 606.96 ft) x 108.27 ft (Bulges 114.83 ft) x (31.17 / 32.67 ft)
   (189.08 m / 185.00 m) x 33.00 m (Bulges 35.00 m)  x (9.50 / 9.96 m)

Armament:
      13 - 14.37" / 365 mm 45.0 cal guns - 1,496.34lbs / 678.73kg shells, 140 per gun
     Breech loading guns in turret on barbette mounts, 1916 Model
     3 x 3-gun mounts on centreline, evenly spread
     2 x 2-gun mounts on centreline ends, evenly spread
      2 raised mounts
      8 - 6.50" / 165 mm 43.0 cal guns - 143.30lbs / 65.00kg shells, 1,250 per gun
     Quick firing guns in deck and hoist mounts, 1916 Model
     8 x Single mounts on side ends, evenly spread
      4 raised mounts - superfiring
      12 - 6.50" / 165 mm 43.0 cal guns - 143.30lbs / 65.00kg shells, 200 per gun
     Quick firing guns in casemate mounts, 1916 Model
     12 x Single mounts on sides, evenly spread
      12 hull mounts in casemates- Limited use in heavy seas
      10 - 3.54" / 90.0 mm 50.0 cal guns - 24.25lbs / 11.00kg shells, 350 per gun
     Anti-air guns in deck and hoist mounts, 1916 Model
     10 x Single mounts on side ends, majority forward
      10 double raised mounts
      Weight of broadside 22,561 lbs / 10,233 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13.8" / 350 mm   370.24 ft / 112.85 m   15.52 ft / 4.73 m
   Ends:   0.98" / 25 mm   236.68 ft / 72.14 m   13.12 ft / 4.00 m
   Upper:   2.56" / 65 mm   314.96 ft / 96.00 m   12.96 ft / 3.95 m
     Main Belt covers 94 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.81" / 46 mm   370.24 ft / 112.85 m   34.81 ft / 10.61 m
   Beam between torpedo bulkheads 72.18 ft / 22.00 m

   - Hull Bulges:
      0.47" / 12 mm   370.24 ft / 112.85 m   22.97 ft / 7.00 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   15.7" / 400 mm   7.87" / 200 mm      13.6" / 345 mm
   2nd:   2.95" / 75 mm   1.57" / 40 mm      2.95" / 75 mm
   3rd:   3.94" / 100 mm   1.38" / 35 mm      1.38" / 35 mm
   4th:   0.98" / 25 mm   0.39" / 10 mm      0.98" / 25 mm

   - Protected deck - multiple decks:
   For and Aft decks: 4.33" / 110 mm
   Forecastle: 1.18" / 30 mm  Quarter deck: 3.15" / 80 mm

   - Conning towers: Forward 13.78" / 350 mm, Aft 3.94" / 100 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 35,698 shp / 26,631 Kw = 20.00 kts
   Range 8,015nm at 14.00 kts
   Bunker at max displacement = 4,833 tons

Complement:
   1,414 - 1,839

Cost:
   £5.538 million / $22.153 million

Distribution of weights at normal displacement:
   Armament: 4,611 tons, 11.5 %
      - Guns: 4,611 tons, 11.5 %
   Armour: 14,035 tons, 35.1 %
      - Belts: 4,217 tons, 10.5 %
      - Torpedo bulkhead: 864 tons, 2.2 %
      - Bulges: 149 tons, 0.4 %
      - Armament: 4,760 tons, 11.9 %
      - Armour Deck: 3,599 tons, 9.0 %
      - Conning Towers: 447 tons, 1.1 %
   Machinery: 1,330 tons, 3.3 %
   Hull, fittings & equipment: 12,728 tons, 31.8 %
   Fuel, ammunition & stores: 6,033 tons, 15.1 %
   Miscellaneous weights: 1,295 tons, 3.2 %
      - Hull below water: 558 tons
      - Bulge void weights: 100 tons
      - On freeboard deck: 150 tons
      - Above deck: 487 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     64,044 lbs / 29,050 Kg = 43.2 x 14.4 " / 365 mm shells or 11.4 torpedoes
   Stability (Unstable if below 1.00): 1.24
   Metacentric height 8.3 ft / 2.5 m
   Roll period: 16.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.61
   Seaboat quality  (Average = 1.00): 1.51

Hull form characteristics:
   Hull has low quarterdeck ,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.645 / 0.648
   Length to Beam Ratio: 5.29 : 1
   'Natural speed' for length: 24.64 kts
   Power going to wave formation at top speed: 44 %
   Trim (Max stability = 0, Max steadiness = 100): 47
   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:   24.00 %,  25.43 ft / 7.75 m,  22.31 ft / 6.80 m
      - Forward deck:   31.00 %,  22.31 ft / 6.80 m,  21.33 ft / 6.50 m
      - Aft deck:   30.00 %,  21.33 ft / 6.50 m,  21.33 ft / 6.50 m
      - Quarter deck:   15.00 %,  13.12 ft / 4.00 m,  13.94 ft / 4.25 m
      - Average freeboard:      20.84 ft / 6.35 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 92.5 %
      - Above water (accommodation/working, high = better): 145.6 %
   Waterplane Area: 50,110 Square feet or 4,655 Square metres
   Displacement factor (Displacement / loading): 108 %
   Structure weight / hull surface area: 220 lbs/sq ft or 1,072 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.66
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather


Tapered belt from +2.7 to -2.5
2.7 to 1.5     200 -> 350     : 240,000+90,000
1.5 to -1.5      350                 : 1,050,000
-1.5 to -2.5   350-> 200     : 200,000+ 75,000
total : 1,655,000mm3
350mm ave = 4.73

TDS : Bulge, hull, liquid (18) void (18), liquid armored (30), Dam control, flooding (8)

462 FC
25  LR Radio

25 Kite balloon
75 Additional Fire Suppression
25 Hulesmeyer device
25 Searchlight tower

50   Extra pumps
323 turbo electric
185 torpedo nets


Decks

+6.5 Weather deck 30mm, top upper belt.
+4.0   Battery deck
          +2.7 top main belt
+1.5  Crown protective deck    80mm, top of TDS.
-1.0   Bottom edge protective deck
          -2.5 bottom main belt 
-3.5  2nd Deck
-6.0 1st Deck
-8.5 Engineering
-9.55 Double Bottom

[Kaiser Kirk]

Sealord – this is basically a series of ships working off the Nevada arrangement, some of which have Queen Elizabeth speed.

Tapered Belt


Like the preceeding this has a tapered belt
They are not quite the same, as the Parthians have not worked out all the exact details.


Belt width :
+2.6  to +1.4m : : Tapers from 200mm to 350mm   
+1.40 to - 1.5m  :  350 MB
-1.5 to - 2.5m   :  MB : Tapers from 355mm to 200mm

This means
1.2m * 200mm  + 1.2m * (350-200)/2  = 240,000mm3+90,000mm3 = 330,000mm3
2.9m * 350mm = 1,015,000mm3
1.0m * 200mm + 1.0m * (350-200)/2 = 200,000mm3 + 75000mm3 = 275,000mm
Total : 1,620,000 cubic mm
Average thickness of 350mm  = (1,620,000/350) = 4,628mm high, or 4.63m.

With a 6.45m freeboard,
and the top of the main belt at +2.6m, the upper belt needs to be 3.85m high.
This puts the casement battery deck at +3.9m.
As typical, this only extends from "B" to "X", and so

Sealord-Fast, Partha Battleship laid down 1915

Displacement:
   34,116 t light; 36,310 t standard; 38,484 t normal; 40,223 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (620.51 ft / 613.52 ft) x 104.99 ft (Bulges 114.83 ft) x (30.35 / 31.60 ft)
   (189.13 m / 187.00 m) x 32.00 m (Bulges 35.00 m)  x (9.25 / 9.63 m)

Armament:
      10 - 14.37" / 365 mm 45.0 cal guns - 1,488.12lbs / 675.00kg shells, 120 per gun
     Breech loading guns in turret on barbette mounts, 1915 Model
     2 x 3-gun mounts on centreline ends, evenly spread
     2 x 2-gun mounts on centreline ends, evenly spread
      2 raised mounts
      12 - 6.50" / 165 mm 50.0 cal guns - 143.30lbs / 65.00kg shells, 240 per gun
     Quick firing guns in casemate mounts, 1915 Model
     12 x Single mounts on sides, evenly spread
      12 hull mounts in casemates- Limited use in heavy seas
      8 - 6.50" / 165 mm 43.0 cal guns - 143.30lbs / 65.00kg shells, 240 per gun
     Quick firing guns in deck and hoist mounts, 1915 Model
     8 x Single mounts on sides, evenly spread
      6 - 3.54" / 90.0 mm 50.0 cal guns - 24.25lbs / 11.00kg shells, 600 per gun
     Anti-air guns in deck mounts, 1915 Model
     4 x Single mounts on side ends, evenly spread
      4 raised mounts
     2 x Single mounts on centreline ends, evenly spread
      2 double raised mounts
      16 - 0.45" / 11.4 mm 72.0 cal guns - 0.04lbs / 0.02kg shells, 5,000 per gun
     Machine guns in deck mounts, 1915 Model
     8 x Twin mounts on sides, evenly spread
      8 double raised mounts
      Weight of broadside 17,893 lbs / 8,116 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13.8" / 350 mm   368.11 ft / 112.20 m   15.19 ft / 4.63 m
   Ends:   2.56" / 65 mm   245.37 ft / 74.79 m   12.80 ft / 3.90 m
   Upper:   3.54" / 90 mm   314.96 ft / 96.00 m   12.63 ft / 3.85 m
     Main Belt covers 92 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.81" / 46 mm   368.11 ft / 112.20 m   33.79 ft / 10.30 m
   Beam between torpedo bulkheads 82.02 ft / 25.00 m

   - Hull Bulges:
      0.51" / 13 mm   355.84 ft / 108.46 m   22.15 ft / 6.75 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   14.2" / 360 mm   7.87" / 200 mm      13.8" / 350 mm
   2nd:   3.94" / 100 mm   0.98" / 25 mm      0.98" / 25 mm
   3rd:   2.56" / 65 mm   0.98" / 25 mm      2.56" / 65 mm
   4th:   0.31" / 8 mm         -               -

   - Protected deck - multiple decks:
   For and Aft decks: 4.92" / 125 mm
   Forecastle: 1.18" / 30 mm  Quarter deck: 3.54" / 90 mm

   - Conning towers: Forward 13.98" / 355 mm, Aft 3.54" / 90 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 96,558 shp / 72,032 Kw = 26.00 kts
   Range 9,000nm at 12.00 kts
   Bunker at max displacement = 3,913 tons

Complement:
   1,373 - 1,785

Cost:
   £4.796 million / $19.184 million

Distribution of weights at normal displacement:
   Armament: 3,711 tons, 9.6 %
      - Guns: 3,711 tons, 9.6 %
   Armour: 13,671 tons, 35.5 %
      - Belts: 4,463 tons, 11.6 %
      - Torpedo bulkhead: 834 tons, 2.2 %
      - Bulges: 149 tons, 0.4 %
      - Armament: 3,885 tons, 10.1 %
      - Armour Deck: 3,910 tons, 10.2 %
      - Conning Towers: 430 tons, 1.1 %
   Machinery: 3,657 tons, 9.5 %
   Hull, fittings & equipment: 12,174 tons, 31.6 %
   Fuel, ammunition & stores: 4,368 tons, 11.4 %
   Miscellaneous weights: 903 tons, 2.3 %
      - Hull below water: 222 tons
      - Bulge void weights: 250 tons
      - Hull above water: 35 tons
      - Above deck: 396 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     54,737 lbs / 24,828 Kg = 36.9 x 14.4 " / 365 mm shells or 9.1 torpedoes
   Stability (Unstable if below 1.00): 1.27
   Metacentric height 8.3 ft / 2.5 m
   Roll period: 16.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 51 %
         - Recoil effect (Restricted arc if above 1.00): 0.42
   Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.630 / 0.632
   Length to Beam Ratio: 5.34 : 1
   'Natural speed' for length: 24.77 kts
   Power going to wave formation at top speed: 57 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   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:   25.00 %,  26.08 ft / 7.95 m,  24.44 ft / 7.45 m
      - Forward deck:   28.00 %,  24.44 ft / 7.45 m,  21.16 ft / 6.45 m
      - Aft deck:   32.00 %,  21.16 ft / 6.45 m,  21.16 ft / 6.45 m
      - Quarter deck:   15.00 %,  21.16 ft / 6.45 m,  22.80 ft / 6.95 m
      - Average freeboard:      22.73 ft / 6.93 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 90.4 %
      - Above water (accommodation/working, high = better): 147.4 %
   Waterplane Area: 48,442 Square feet or 4,500 Square metres
   Displacement factor (Displacement / loading): 104 %
   Structure weight / hull surface area: 206 lbs/sq ft or 1,004 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.94
      - Longitudinal: 1.72
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room


Secondary : Like the Iowa class which has it's 5" battery in two rows on each side,
the 4 x 165mm guns on each side are staggered.   The mounts are enclosed against blast.
This is allows all 4 to fire on broadside, and 4 to fire forward, and 4 aft.
When combined with the casement guns, and adequate weather, this gives 10 Foreward/Broadside/Aft

                     4    6
             2                   8
A   B                                  X   Y
             1                    7
                     3    5


Belt width :
+2.6  to +1.4m : : Tapers from 200mm to 350mm   
+1.40 to - 1.5m  :  350 MB
-1.5 to - 2.5m   :  MB : Tapers from 355mm to 200mm (275 average)

This means
1.2m * 200mm  + 1.2m * (350-200)/2  = 240,000mm3+90,000mm3 = 330,000mm3
2.9m * 350mm = 1,015,000mm3
1.0m * 200mm + 1.0m * (350-200)/2 = 200,000mm3 + 75000mm3 = 275,000mm
Total : 1,620,000 cubic mm
Average thickness of 350mm  = (1,620,000/350) = 4,628mm high, or 4.63m.


The upper belt is 3.85m, extending from"B" to "X",

The TDS is 3.5m deep on each side, with a 1.5m exterior bulge with a 13mm STS skin.
The Bulge is air loaded, to disconnect any shockwave. The adjacent hull is high tensile steel (3/4":18mm) for maximum flex. Then there is a  1.75m fuel loaded compartment backed  by a 18mm ductile armor plate. This will allow the shockwave to be evenly distributed and slow or stop any splinters. Behind that is a 1.75m void  backed by 30mm armored bulkhead. This provides expansion space for any shockwave and a final barrier, an 8mm flooding bulkhead located 5m from the point of detonation.


Miscellaneous weight :
Void :
280t : Construction Reserve


Above Deck
371t : FC
25t : LR Radio

On Deck :


H-AW
35t  - C02 compresser A/C

HBW:
187t : Torpedo Nets
35t : Extra Pumps

Decks :
+6.45  Weather deck 35mm
+3.90m : Battery Deck
               +2.6m: Top taped belt
+1.40m : Crown of protective deck 90mm, Top of TDS
-1.10m  : Lower edge of protective deck
               -2.5m  : Bottom tapered belt
-3.60 : 2nd deck
-6.10 : 1st Deck
-8.60 : Engineering Deck
-8.81m : Double Bottom
-9.25m : Keel

[Kaiser Kirk]

Scythian / Sarmartian

This is the "Large Armored Cruiser" capable of standing in the rear of the line of battle if needed.
Only 8 guns, only a 330mm belt... but felt capable of standingn up to the other "Large Armored Cruisers" out there and serving to bolster the Parthian Scouting force.
It was not designed with a tapered belt, just yee olde slab o' steel.

Scythian, Parthian Battlecruiser laid down 1916

Displacement:
   31,720 t light; 33,431 t standard; 35,852 t normal; 37,788 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (654.68 ft / 646.33 ft) x 95.14 ft (Bulges 101.71 ft) x (30.35 / 31.81 ft)
   (199.55 m / 197.00 m) x 29.00 m (Bulges 31.00 m)  x (9.25 / 9.70 m)

Armament:
      8 - 14.37" / 365 mm 45.0 cal guns - 1,488.12lbs / 675.00kg shells, 120 per gun
     Breech loading guns in turret on barbette mounts, 1916 Model
     1 x 2-gun mount on centreline, forward deck centre
      1 raised mount
     3 x 2-gun mounts on centreline, evenly spread
      8 - 5.12" / 130 mm 50.0 cal guns - 70.55lbs / 32.00kg shells, 250 per gun
     Quick firing guns in deck and hoist mounts, 1916 Model
     4 x 2-gun mounts on centreline ends, evenly spread
      12 - 5.12" / 130 mm 50.0 cal guns - 70.55lbs / 32.00kg shells, 190 per gun
     Quick firing guns in casemate mounts, 1916 Model
     12 x Single mounts on sides, evenly spread
      12 hull mounts in casemates- Limited use in heavy seas
      8 - 3.54" / 90.0 mm 50.0 cal guns - 24.25lbs / 11.00kg shells, 300 per gun
     Anti-air guns in deck mounts, 1916 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
     4 x Single mounts on sides, evenly spread
      4 double raised mounts
      Weight of broadside 13,510 lbs / 6,128 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13.0" / 330 mm   433.04 ft / 131.99 m   13.45 ft / 4.10 m
   Ends:   1.18" / 30 mm   213.25 ft / 65.00 m   13.45 ft / 4.10 m
   Upper:   2.56" / 65 mm   367.42 ft / 111.99 m   12.80 ft / 3.90 m
     Main Belt covers 103 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.81" / 46 mm   433.04 ft / 131.99 m   28.94 ft / 8.82 m
   Beam between torpedo bulkheads 75.46 ft / 23.00 m

   - Hull Bulges:
      0.47" / 12 mm   358.27 ft / 109.20 m   23.79 ft / 7.25 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13.6" / 345 mm   7.09" / 180 mm      12.4" / 315 mm
   2nd:   2.56" / 65 mm   0.98" / 25 mm      2.56" / 65 mm
   3rd:   2.56" / 65 mm   1.18" / 30 mm      1.18" / 30 mm
   4th:   0.20" / 5 mm         -               -

   - Protected deck - multiple decks:
   For and Aft decks: 4.13" / 105 mm
   Forecastle: 1.18" / 30 mm  Quarter deck: 2.95" / 75 mm

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

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 141,580 shp / 105,619 Kw = 29.25 kts
   Range 7,800nm at 14.00 kts
   Bunker at max displacement = 4,357 tons

Complement:
   1,302 - 1,693

Cost:
   £5.040 million / $20.161 million

Distribution of weights at normal displacement:
   Armament: 2,839 tons, 7.9 %
      - Guns: 2,839 tons, 7.9 %
   Armour: 11,486 tons, 32.0 %
      - Belts: 3,923 tons, 10.9 %
      - Torpedo bulkhead: 840 tons, 2.3 %
      - Bulges: 149 tons, 0.4 %
      - Armament: 3,025 tons, 8.4 %
      - Armour Deck: 3,254 tons, 9.1 %
      - Conning Towers: 295 tons, 0.8 %
   Machinery: 5,275 tons, 14.7 %
   Hull, fittings & equipment: 11,422 tons, 31.9 %
   Fuel, ammunition & stores: 4,132 tons, 11.5 %
   Miscellaneous weights: 698 tons, 1.9 %
      - Hull below water: 197 tons
      - Bulge void weights: 160 tons
      - On freeboard deck: 32 tons
      - Above deck: 309 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     47,184 lbs / 21,402 Kg = 31.8 x 14.4 " / 365 mm shells or 6.6 torpedoes
   Stability (Unstable if below 1.00): 1.21
   Metacentric height 6.6 ft / 2.0 m
   Roll period: 16.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 52 %
         - Recoil effect (Restricted arc if above 1.00): 0.54
   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): 0.629 / 0.632
   Length to Beam Ratio: 6.35 : 1
   'Natural speed' for length: 25.42 kts
   Power going to wave formation at top speed: 60 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   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 %,  31.17 ft / 9.50 m,  29.53 ft / 9.00 m
      - Forward deck:   40.00 %,  29.53 ft / 9.00 m,  27.89 ft / 8.50 m
      - Aft deck:   27.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Quarter deck:   13.00 %,  19.69 ft / 6.00 m,  21.33 ft / 6.50 m
      - Average freeboard:      25.50 ft / 7.77 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 101.5 %
      - Above water (accommodation/working, high = better): 169.5 %
   Waterplane Area: 46,206 Square feet or 4,293 Square metres
   Displacement factor (Displacement / loading): 104 %
   Structure weight / hull surface area: 186 lbs/sq ft or 909 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.77
      - Overall: 1.01
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room


Upper belt covers from 2.1m to 6m at weather deck level
Forecastle is unarmored.

Main belt is untapered.
Rises 1.1 m above crown of protective deck to intercept shells from <24000m,
descends to 2m below WL


TDS is 3.5m deep, 2.5 internal.
1m Bulge
Hull
1m fuel
8mm bulkhead
1.5m void
38mm twinned armored bulkheads


Miscellaneous Weight :
284t Fire control 1910
25t  Long Range Radio
32t "Windmaker" CO2 refrigerator/air conditioner
180t (void) construction reserve.
204t Torpedo nets

+8.5m  Forecastle deck
+6.0m  Weather Deck, 30mm armored deck, top of Upper Belt,
+3.5m  Gun Deck
                +2.1  Top of main belt
+1.0m  Main Deck, Crown Protective Deck 75mm
-1.5m   2nd Deck,  , lower edge of protective deck.
            -2.0m Bottom Main Belt
-4.0m   1st Deck
-8.00m : Engineering deck (4.5m high)
-8.79m : Double Bottom

[Kaiser Kirk]

Samatian

This is the 'large armored cruiser' more intended to find and kill enemy armored cruisers.
To do this, it wants to be able to penetrate the expected Byzantine main belt of 200mm at current battle ranges, 14km.
During set up, I designed Tiamat class with both a 345L45 and a 365L40, so my beginning Artillery has the 345L45.
It's a lighter gun, with a smidge better performance than the 365L40, but a smaller shell, so I used the 365L40 on the Tiamat class. For this role, it's appropriate, AND has a reasonable chance against the Byzantine "Large armored Cruisers" Parthia likely knows exist, but would not know the details thereof yet.

I'd say it's far more likely that I build a Scythian, the tonnage difference is not prohibitive, and I get a more useful ship.

Sarmatian, Parthian Battlecruiser laid down 1916

Displacement:
   27,992 t light; 29,591 t standard; 31,922 t normal; 33,786 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (622.09 ft / 613.52 ft) x 95.14 ft (Bulges 101.71 ft) x (30.35 / 31.89 ft)
   (189.61 m / 187.00 m) x 29.00 m (Bulges 31.00 m)  x (9.25 / 9.72 m)

Armament:
      8 - 13.58" / 345 mm 45.0 cal guns - 1,267.66lbs / 575.00kg shells, 135 per gun
     Breech loading guns in turret on barbette mounts, 1916 Model
     1 x 2-gun mount on centreline, forward deck centre
      1 raised mount
     3 x 2-gun mounts on centreline, evenly spread
      8 - 5.12" / 130 mm 50.0 cal guns - 70.55lbs / 32.00kg shells, 250 per gun
     Quick firing guns in deck and hoist mounts, 1916 Model
     4 x 2-gun mounts on centreline ends, evenly spread
      12 - 5.12" / 130 mm 50.0 cal guns - 70.55lbs / 32.00kg shells, 190 per gun
     Quick firing guns in casemate mounts, 1916 Model
     12 x Single mounts on sides, evenly spread
      12 hull mounts in casemates- Limited use in heavy seas
      8 - 3.54" / 90.0 mm 50.0 cal guns - 24.25lbs / 11.00kg shells, 300 per gun
     Anti-air guns in deck mounts, 1916 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
     4 x Single mounts on sides, evenly spread
      4 double raised mounts
      Weight of broadside 11,746 lbs / 5,328 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   10.0" / 255 mm   441.73 ft / 134.64 m   13.45 ft / 4.10 m
   Ends:   1.97" / 50 mm   171.75 ft / 52.35 m   13.45 ft / 4.10 m
   Upper:   2.95" / 75 mm   376.12 ft / 114.64 m   13.12 ft / 4.00 m
     Main Belt covers 111 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1.81" / 46 mm   441.73 ft / 134.64 m   28.44 ft / 8.67 m
   Beam between torpedo bulkheads 72.18 ft / 22.00 m

   - Hull Bulges:
      0.47" / 12 mm   358.27 ft / 109.20 m   23.79 ft / 7.25 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   10.4" / 265 mm   6.10" / 155 mm      9.65" / 245 mm
   2nd:   2.95" / 75 mm   0.98" / 25 mm      1.97" / 50 mm
   3rd:   2.95" / 75 mm   1.18" / 30 mm      1.18" / 30 mm
   4th:   0.31" / 8 mm         -               -

   - Protected deck - multiple decks:
   For and Aft decks: 3.74" / 95 mm
   Forecastle: 1.18" / 30 mm  Quarter deck: 2.56" / 65 mm

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

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 133,510 shp / 99,598 Kw = 29.25 kts
   Range 8,150nm at 14.00 kts
   Bunker at max displacement = 4,194 tons

Complement:
   1,193 - 1,552

Cost:
   £4.474 million / $17.897 million

Distribution of weights at normal displacement:
   Armament: 2,497 tons, 7.8 %
      - Guns: 2,497 tons, 7.8 %
   Armour: 9,649 tons, 30.2 %
      - Belts: 3,346 tons, 10.5 %
      - Torpedo bulkhead: 842 tons, 2.6 %
      - Bulges: 149 tons, 0.5 %
      - Armament: 2,277 tons, 7.1 %
      - Armour Deck: 2,763 tons, 8.7 %
      - Conning Towers: 273 tons, 0.9 %
   Machinery: 4,974 tons, 15.6 %
   Hull, fittings & equipment: 10,153 tons, 31.8 %
   Fuel, ammunition & stores: 3,929 tons, 12.3 %
   Miscellaneous weights: 719 tons, 2.3 %
      - Hull below water: 187 tons
      - Bulge void weights: 200 tons
      - On freeboard deck: 57 tons
      - Above deck: 275 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     42,863 lbs / 19,442 Kg = 34.2 x 13.6 " / 345 mm shells or 6.1 torpedoes
   Stability (Unstable if below 1.00): 1.26
   Metacentric height 7.1 ft / 2.2 m
   Roll period: 16.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 53 %
         - Recoil effect (Restricted arc if above 1.00): 0.48
   Seaboat quality  (Average = 1.00): 1.05

Hull form characteristics:
   Hull has rise forward of midbreak,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.590 / 0.594
   Length to Beam Ratio: 6.03 : 1
   'Natural speed' for length: 24.77 kts
   Power going to wave formation at top speed: 61 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   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:   14.00 %,  31.99 ft / 9.75 m,  30.35 ft / 9.25 m
      - Forward deck:   47.00 %,  30.35 ft / 9.25 m,  27.89 ft / 8.50 m
      - Aft deck:   25.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Quarter deck:   14.00 %,  19.69 ft / 6.00 m,  21.33 ft / 6.50 m
      - Average freeboard:      25.82 ft / 7.87 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 108.8 %
      - Above water (accommodation/working, high = better): 174.5 %
   Waterplane Area: 42,295 Square feet or 3,929 Square metres
   Displacement factor (Displacement / loading): 105 %
   Structure weight / hull surface area: 179 lbs/sq ft or 875 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.92
      - Longitudinal: 2.01
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room

Designed as the Parthian "Armored Cruiser Killer" and "Heavy Scout".
This was going to use the old 345L40, but the weight differential
to mount the newer 345L45 was minimal.

With the 345L45, penetration of Byzantine AC belts can be achieved at all battle ranges.  It is less certain this is the case on their newer large ACs, but a 300mm belt can be penetrated at 14km, so there is a reasonable chance.


Upper belt covers from 2.1m to 6m at weather deck level
Forecastle is unarmored.

Main belt is untapered.
Rises 1.1 m above crown of protective deck to intercept shells from <24000m,
descends to 2m below WL


TDS is 4.0m deep, 3.5 internal.
0.5m Bulge to bottom of belt
Hull
1m fuel
8mm bulkhead
1.5m void
38mm twinned armored bulkheads


Miscellaneous Weight :
250t Fire control 1910
25t  Long Range Radio
25t "Kite Balloon"
32t "Windmaker" CO2 refrigerator/air conditioner
100t (void) construction reserve.
187t Torpedo nets

+8.5m  Forecastle deck
+6.0m  Weather Deck, 30mm armored deck, top of Upper Belt,
+3.5m  Gun Deck
                +2.1  Top of main belt
+1.0m  Main Deck, Crown Protective Deck 75mm
-1.5m   2nd Deck,  , lower edge of protective deck.
            -2.0m Bottom Main Belt
-4.0m   1st Deck
-8.00m : Engineering deck (4.5m high)
-8.79m : Double Bottom

[Kaiser Kirk]

So that's 5 potential ships, combined with the 2 prior designs and I have 7.
Most of them are about 34,000 tons, with one +5000t, and one -6000t

Realistically, I am leaning towards two of the Bahamut, 2 either of Sealord/Scythian,  and then likely 2 of the small Capharact, which would be paired with 2 Shamshir.
Some of those are 1915 laydowns, other 1916, so I'm finally at the decision point :)

I'm almost past all the Dock building, I've revamped my destroyers and substantially augmented my cruiser fleet, so I can likely shift focus to these...or some of these.
Of all of them the small Capharact is most likely to be skipped, as that role is most unclear, and refitting older ships may get me that result with less BP.

[The Rock Doctor]

Five quads on a hull forty metres shorter than a KGV?  I'm skeptical.

[Jefgte]

This is the 'large armored cruiser' more intended to find and kill enemy armored cruisers.
To do this, it wants to be able to penetrate the expected Byzantine main belt of 200mm at current battle ranges, 14km.
During set up, I designed Tiamat class with both a 345L45 and a 365L40, so my beginning Artillery has the 345L45.
It's a lighter gun, with a smidge better performance than the 365L40, but a smaller shell, so I used the 365L40 on the Tiamat class. For this role, it's appropriate, AND has a reasonable chance against the Byzantine "Large armored Cruisers" Parthia likely knows exist, but would not know the details thereof yet.

28000t BC to kill 16350t & 14560t AC, it's a bit too heavy ... but equal to Eupatoria.

[Jefgte]

Make me think to build 60 ocean submarines.

;)

[Kaiser Kirk]

Five quads on a hull forty metres shorter than a KGV?  I'm skeptical.

Length is generally driven by speed.  KGV needed good seakeeping for her speed.

Beam should be the limiter for quads, otherwise it's just a 5 turret ship. She's darn beamy.

She's 10m longer than the 13 gun/ 5 turret Conte di-Cavour, with significantly better engine technology, and so needing less machinery spaces.
She's also 10m longer and 5m wider than USS Texas, a 5turret, 14/45 gunned ship, laid down 5 years earlier and 1 knot faster.
With her BC, she's also very blocky through the middle, giving greater effective beam abreast "A" and "Y" than Texas would have.

[Kaiser Kirk]

28000t BC to kill 16350t & 14560t AC, it's a bit too heavy ... but equal to Eupatoria.

I agree. 
I can't seem to find a weapon/speed/armor combination at a tonnage that I like.

[The Rock Doctor]

Five quads on a hull forty metres shorter than a KGV?  I'm skeptical.

Length is generally driven by speed.  KGV needed good seakeeping for her speed.

Beam should be the limiter for quads, otherwise it's just a 5 turret ship. She's darn beamy.

She's 10m longer than the 13 gun/ 5 turret Conte di-Cavour, with significantly better engine technology, and so needing less machinery spaces.
She's also 10m longer and 5m wider than USS Texas, a 5turret, 14/45 gunned ship, laid down 5 years earlier and 1 knot faster.
With her BC, she's also very blocky through the middle, giving greater effective beam abreast "A" and "Y" than Texas would have.

She's beamy, blocky, and powerful, no question about those points.

[snip]

I share Rocky's concerns about the size, not just because I don't think all the turrets could fit, even given the info presented, but that I'm hesitant about the turrets + secondaries fitting. Lets look a the length first. I'll be referencing information from this thread since its the source I have at hand.

For comparison:
Bahamut: Quad 365mm/45 Mounts. I think calling these roughly equivilent to the KGV mounts is a fair leap. That puts the inner diameter at 40ft (12.192m)
New York: Twin 14"/45 mounts. Noted as having a inner diameter of 28ft (8.53m)
Cavor: Unfortunetly this data is not present, but we do have the USN 12"/50 Mk8 tripple, which is noted as having an outer diameter of 26ft 11in (~8.22m) Given this turret has individualy sleaved guns, I think its a fair ballpark for the older Italian tripple.

For the sake of measurements, I will assume that the additional diameter placed by parts that exist outside of this inner diameter (overhang, gun barrels, etc) are identical in what they add. With that in mind, lets look at what the amount of the total lenght taken up by these barbettes would be.

Bahamut: 12.192m x 5 = 60.96m (32.6% of waterline length(187m))
New York: 8.53m x 5 = 42.65m (24.8% of waterline length(172m))
Cavor (outer): 8.22 x 5 = 41.1m (24.3% of waterline length(168.9m))

Using New York because its a comparison with better data, I would think that Bahamut is much more cramped than New York, as being only 15m longer, it has 18.31m more length taken up by its barbettes. To have a similar ratio, Bahamut would need to have a waterline length closer to 240-245m.

For the Seconaries, comparison, with the ships you site.

New York: 21x5"/51, all in hull casemates, none above deck as completed.
Cavour: 18x120mm/50, based on the drawing in Conways these also seem to all be in hull casemates
Doria: 14x152mm/45, hull casemates, this time clustered around AB and XY, with none near Q at all.

None of these ships have deck mounts of the main secondaries, let alone twins. So I would question if the twins would have good coverage relative to putting the guns into additional casemates, especially given the greater cramptness of the Bahamut relitive to these designs when it comes to centerline lenght.

Impossible, no. Tighter than closest historic analogs, yes.

[snip]

For comparison, the same calculation as above run on the KGV

14"/45 Two-gun Turret KGV: Inner diameter 29 ft. 6 in. 8.9916m
14"/45 Four-gun Turret KGV: Inner diameter 40 ft. 0 in. 12.192m

12.192 x 2 + 8.9916 = 33.37m (15.64% of waterline length(213.36m))

So KGV definenelty has some room to accommodate additional turrets, but is not the best 1-to-1 comparison with Bahamut.