Parthian vessels 1916 onwards

[The Rock Doctor]

I'm trying to get into a groove of one new capital ship every year.  I think I can sustain that now that my BP is increasing by two every year.

[Kaiser Kirk]

I thought that after having built 4 '' bigs '' in the same time, we will have a small pose of a few years ...

=> Dont forget Cruisers, DDs, TBs...
Much of your ships are obsolete, they must be replaced.

That is why I am posting up refurbishment plans, many ships have aged poorly.
I plan on re-engining/arming a number of older vessels as I have more $ than BP.

It looks like ~25 cruisers (4 specialized), 12 gunboats, 46 minesweepers, 68 DD, +24 refurb for ASW, 356 MTB-A, only 5 subs, 28 patrol sloops and a Fleet supply vessel in the past decade.
That's not a horrible number.

Long term, I'm trying to settle down to 2 bigs at a time. The lead time is just too long.
But as you can see I've been pretty steadily cranking out cruisers, destroyers, MS and MTBs.
I've held off on Subs until the 1915 tech, as the 1905 and 1910 versions are so limited, so I am slowly starting on a sub arm.

[Kaiser Kirk]

I could delay the Kaliferns to 1921, it really does not help with machinery weight at all.
I could prioritize the Zemaka ACs instead - I was going to post them after this discussion. 

With the need to model the 6xAA version, I tinkered with it overall.
The 'killer app' is trying to model extra deck armor over the magazines.

This version adds a couple meters of length.
That brings it to 36680 tons which / 8 HY is 4585, an even number.

As advertised It reduces the 90AA from 12 to 6.
I will note the N3 class devoted far more tonnage in the 6x 120 & 4x 10x40mm.
So I am a bit ambivalent about reducing it before I have my 57mm AA in service.

I tried something different with the deck armor
With the Brits featuring heavier armor over the magazines, I wanted to emulate that.
But HOW...

This might be a design detail we ignore...or embrace.
But how do we do it?

In this case,
I did 2 different versions, explained it in the design notes,
One for a 35 - 130 - 130 deck
then one for a 35mm box over the magazines.
Which ...I think would suffice as 165mm over the magazines ?
I'm actually over paying there, as the box would have sides.

Anyone got a better way to model this??

Then how to present it in the Sim ??
I gave it a shot. Let me know.

Kalifern IV, Parthian Battleship laid down 1920 (Engine 1921)

Displacement:
   36,680 t light; 40,185 t standard; 42,674 t normal; 44,666 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (620.08 ft / 606.96 ft) x 111.55 ft (Bulges 121.39 ft) x (31.33 / 32.68 ft)
   (189.00 m / 185.00 m) x 34.00 m (Bulges 37.00 m)  x (9.55 / 9.96 m)

Armament:
      16 - 14.37" / 365 mm 50.0 cal guns - 1,719.61lbs / 780.00kg shells, 162 per gun
     Breech loading guns in turret on barbette mounts, 1920 Model
     4 x Quad mounts on centreline, evenly spread
      2 raised mounts
      16 - 5.12" / 130 mm 50.0 cal guns - 70.55lbs / 32.00kg shells, 227 per gun
     Quick firing guns in deck and hoist mounts, 1920 Model
     8 x 2-gun mounts on sides, evenly spread
      6 - 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, 1920 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
     2 x 2-gun mounts on centreline ends, evenly spread
      2 double raised mounts
      16 - 0.59" / 15.0 mm 60.0 cal guns - 0.11lbs / 0.05kg shells, 5,000 per gun
     Machine guns in deck mounts, 1920 Model
     8 x Twin mounts on sides, evenly spread
      8 double raised mounts
      Weight of broadside 28,790 lbs / 13,059 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13.8" / 350 mm   394.52 ft / 120.25 m   14.34 ft / 4.37 m
   Ends:   1.38" / 35 mm   212.40 ft / 64.74 m   14.34 ft / 4.37 m
     Main Belt covers 100 % of normal length
     Main Belt inclined 10.00 degrees (positive = in)

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      2.99" / 76 mm   394.52 ft / 120.25 m   35.96 ft / 10.96 m
   Beam between torpedo bulkheads 82.02 ft / 25.00 m

   - Hull Bulges:
      0.35" / 9 mm   394.52 ft / 120.25 m   23.13 ft / 7.05 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   15.7" / 400 mm   7.87" / 200 mm      13.8" / 350 mm
   2nd:   2.56" / 65 mm   1.38" / 35 mm      1.97" / 50 mm
   4th:   0.31" / 8 mm         -         0.31" / 8 mm

   - Armoured deck - single deck:
   For and Aft decks: 5.28" / 134 mm
   Forecastle: 1.38" / 35 mm  Quarter deck: 5.12" / 130 mm

Note : Armor deck is arranged :
   For and Aft decks: 5.12" / 130 mm
   Forecastle: 1.38" / 35 mm  Quarter deck: 5.12" / 130 mm
AND  Box over magazines: 1.38" / 35 mm

For a combined over magazines of 165mm.

   - Conning towers: Forward 13.78" / 350 mm, Aft 2.95" / 75 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 37,458 shp / 27,944 Kw = 20.00 kts
   Range 8,200nm at 14.00 kts
   Bunker at max displacement = 4,481 tons

Complement:   
   1,483 - 1,929

Cost:
   £9.937 million / $39.747 million

Distribution of weights at normal displacement:
   Armament: 5,086 tons, 11.9 %
      - Guns: 5,086 tons, 11.9 %
   Armour: 13,942 tons, 32.7 %
      - Belts: 3,676 tons, 8.6 %
      - Torpedo bulkhead: 1,571 tons, 3.7 %
      - Bulges: 120 tons, 0.3 %
      - Armament: 3,389 tons, 7.9 %
      - Armour Deck: 4,747 tons, 11.1 %
      - Conning Towers: 440 tons, 1.0 %
   Machinery: 1,290 tons, 3.0 %
   Hull, fittings & equipment: 14,855 tons, 34.8 %
   Fuel, ammunition & stores: 5,995 tons, 14.0 %
   Miscellaneous weights: 1,507 tons, 3.5 %
      - Hull below water: 546 tons
      - Bulge void weights: 280 tons
      - On freeboard deck: 147 tons
      - Above deck: 534 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     47,955 lbs / 21,752 Kg = 32.3 x 14.4 " / 365 mm shells or 9.6 torpedoes
   Stability (Unstable if below 1.00): 1.15
   Metacentric height 7.6 ft / 2.3 m
   Roll period: 18.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.55
   Seaboat quality  (Average = 1.00): 1.09

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.647 / 0.649
   Length to Beam Ratio: 5.00 : 1
   'Natural speed' for length: 24.64 kts
   Power going to wave formation at top speed: 44 %
   Trim (Max stability = 0, Max steadiness = 100): 64
   Bow angle (Positive = bow angles forward): 17.00 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 %,  19.03 ft / 5.80 m,  16.57 ft / 5.05 m
      - Forward deck:   37.00 %,  16.57 ft / 5.05 m,  14.11 ft / 4.30 m
      - Aft deck:   28.00 %,  14.11 ft / 4.30 m,  14.11 ft / 4.30 m
      - Quarter deck:   15.00 %,  14.11 ft / 4.30 m,  15.09 ft / 4.60 m
      - Average freeboard:      15.33 ft / 4.67 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 97.6 %
      - Above water (accommodation/working, high = better): 98.4 %
   Waterplane Area: 51,723 Square feet or 4,805 Square metres
   Displacement factor (Displacement / loading): 97 %
   Structure weight / hull surface area: 249 lbs/sq ft or 1,213 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.40
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

Mark IV
No upper belt, all on-deck guns


Kalifern
Dropping the Q turret of the prior class, the limited arcs
mean most of the firepower is retained, and with the upgrade
to the 50 caliber gun, they expect nearly the same combat
effectiveness from the smaller ship.
On paper the throwwieght is 91% the same, but with the improvements in sectional density and better arcs, they expect no functional difference.


Deck Guns
Deck guns are echloned outwards, like on Iowa,
allowing 4 to bear ahead (8 guns), or 4 on each side.
The single 90m AA are above them.

Main Belt Armor 
This embraces "all or nothing", but only has 1 deck level unprotected.
The main armor deck caps the belt at 1.8m.
The belt is a uniform thickness. extending from the armor deck to 2.5m below water.

Belt is slightly outsloped by 10%.
Outsloping
Overall it is 4.3m high. which is "A" or adjacent
COS 10 = A/H
H* Cos 10 = A
H = A/Cos 10

Which gives 4.366 or 4.37 as the height.

Deck Armor
35/130/130 is 4,617tons
35mm box over the magazines is 130tons
For a total of 4,747 tons
Which takes a Fore&Aft thickness of 134.2

TDS
Raised to the underside of the Armor deck at 1.8m above waterline.

TDS : (9) Bulge (mild hull), liquid (19mm) void (19), liquid armored (2x19=38mm), Dam control, flooding (mild)


There is a 35mm Box around the magazines this adds 130 tons,
boosting total deck to 4574

280t Reserve Wt

509t Fire Control
25  LR Radio

25 kite balloon
36t Additional fire suppresion
36t CO2 Air conditioning
25 Hulesmeyer device
25 Searchlight tower

36   Extra pumps
328 turbo electric
182 torpedo nets


Decks
+4.3  Weather deck
+1.8  Armor Deck 125mm , top of TDS.
-0.7   3rd Deck
          -2.5 bottom main belt 
-3.2  2nd Deck
-5.7  1st Deck
-8.2   Engineering
-9.16 Double Bottom

[Kaiser Kirk]

So, likely the last version of Kalifern. Version V.

After this has been up a little bit, I'll put up the new cruiser and armored cruiser designs.
The Armored Cruiser I will probably lay down in 1920.0 instead of the Kalifern.
The cruiser may also wait for 1921, or may be put down in 1920.

As for the battlewagon, a little pause such as Jefgte mentioned may be ok.
I am pretty sure at least the heavy part of my battleline is strong,
even if the support elements are aging.

Taking the idea of delaying it slightly, and putting the laydown date to 1921.
With the critique of the AA, it's reduced and the Secondary/Tertiary rearranged.

A schematic of the layout is added

The belt has been changed to tapered, and still outsloped.

The armor deck has the above calculation, using
an 'box over magazine' setting to calculate either a thicker armor deck over magazines
...or just a box over magazines. 


Kalifern V, Parthian Battleship laid down 1921

Displacement:
   37,000 t light; 40,225 t standard; 42,674 t normal; 44,634 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (620.08 ft / 606.96 ft) x 111.55 ft (Bulges 121.39 ft) x (31.33 / 32.66 ft)
   (189.00 m / 185.00 m) x 34.00 m (Bulges 37.00 m)  x (9.55 / 9.95 m)

Armament:
      16 - 14.37" / 365 mm 50.0 cal guns - 1,719.61lbs / 780.00kg shells, 140 per gun
     Breech loading guns in turret on barbette mounts, 1918 Model
     4 x Quad mounts on centreline, evenly spread
      2 raised mounts
      20 - 5.12" / 130 mm 50.0 cal guns - 70.55lbs / 32.00kg shells, 220 per gun
     Quick firing guns in deck and hoist mounts, 1913 Model
     8 x 2-gun mounts on side ends, evenly spread
     2 x 2-gun mounts on centreline ends, evenly spread
      2 double raised mounts
      8 - 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, 1911 Model
     4 x 2-gun mounts on side ends, evenly spread
      4 double raised mounts
      16 - 0.59" / 15.0 mm 60.0 cal guns - 0.11lbs / 0.05kg shells, 5,000 per gun
     Machine guns in deck mounts, 1921 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
     4 x Twin mounts on sides, evenly spread
      4 double raised mounts
      Weight of broadside 29,121 lbs / 13,209 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13.8" / 350 mm   394.52 ft / 120.25 m   15.19 ft / 4.63 m
   Ends:   1.38" / 35 mm   212.40 ft / 64.74 m   11.48 ft / 3.50 m
     Main Belt covers 100 % of normal length
     Main Belt inclined 15.00 degrees (positive = in)

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      2.99" / 76 mm   394.52 ft / 120.25 m   35.96 ft / 10.96 m
   Beam between torpedo bulkheads 82.02 ft / 25.00 m

   - Hull Bulges:
      0.35" / 9 mm   394.52 ft / 120.25 m   23.13 ft / 7.05 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   15.7" / 400 mm   7.87" / 200 mm      13.8" / 350 mm
   2nd:   2.95" / 75 mm   1.38" / 35 mm      1.97" / 50 mm
   3rd:   0.98" / 25 mm   0.98" / 25 mm      0.98" / 25 mm
   4th:   0.24" / 6 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 5.27" / 134 mm
   Forecastle: 1.38" / 35 mm  Quarter deck: 5.12" / 130 mm

   - Conning towers: Forward 13.78" / 350 mm, Aft 2.95" / 75 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 37,458 shp / 27,944 Kw = 20.00 kts
   Range 8,056nm at 14.00 kts
   Bunker at max displacement = 4,409 tons

Complement:
   1,483 - 1,929

Cost:
   £10.819 million / $43.277 million

Distribution of weights at normal displacement:
   Armament: 5,186 tons, 12.2 %
      - Guns: 5,186 tons, 12.2 %
   Armour: 14,164 tons, 33.2 %
      - Belts: 3,846 tons, 9.0 %
      - Torpedo bulkhead: 1,571 tons, 3.7 %
      - Bulges: 120 tons, 0.3 %
      - Armament: 3,450 tons, 8.1 %
      - Armour Deck: 4,738 tons, 11.1 %
      - Conning Towers: 440 tons, 1.0 %
   Machinery: 1,290 tons, 3.0 %
   Hull, fittings & equipment: 14,922 tons, 35.0 %
   Fuel, ammunition & stores: 5,674 tons, 13.3 %
   Miscellaneous weights: 1,438 tons, 3.4 %
      - Hull below water: 545 tons
      - Bulge void weights: 200 tons
      - On freeboard deck: 149 tons
      - Above deck: 544 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     47,433 lbs / 21,515 Kg = 32.0 x 14.4 " / 365 mm shells or 9.6 torpedoes
   Stability (Unstable if below 1.00): 1.13
   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): 0.57
   Seaboat quality  (Average = 1.00): 1.08

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.647 / 0.649
   Length to Beam Ratio: 5.00 : 1
   'Natural speed' for length: 24.64 kts
   Power going to wave formation at top speed: 44 %
   Trim (Max stability = 0, Max steadiness = 100): 65
   Bow angle (Positive = bow angles forward): 17.00 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 %,  19.03 ft / 5.80 m,  16.73 ft / 5.10 m
      - Forward deck:   30.00 %,  16.73 ft / 5.10 m,  14.11 ft / 4.30 m
      - Aft deck:   35.00 %,  14.11 ft / 4.30 m,  14.11 ft / 4.30 m
      - Quarter deck:   15.00 %,  14.11 ft / 4.30 m,  15.09 ft / 4.60 m
      - Average freeboard:      15.28 ft / 4.66 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 97.6 %
      - Above water (accommodation/working, high = better): 97.7 %
   Waterplane Area: 51,723 Square feet or 4,805 Square metres
   Displacement factor (Displacement / loading): 96 %
   Structure weight / hull surface area: 250 lbs/sq ft or 1,223 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.40
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

NEEED TO DO DECK ARMOR

Mark V

Reduces AA to 8 guns,
Repositions to superstructure corners.
130mm put in place
Roughly
A/B/X/Y : Pair O Twins (4 Gun) 365mm
1-12 : 2-Gun 130mm
a-c : 2-Gun 90mm AA

                     4           6
                2   a           b   8
A  (B) 1                              10  (X) Y
                3   c           d   9 
                     5           7

This gives good main battery Arcs,
It gives considerable 130mm fire fore/aft and on broadside
and for 1920 has robust AA, sited at superstructure corners for 4 barrels in each direction.


Kalifern
Dropping the Q turret of the prior class, the limited arcs
mean most of the firepower is retained, and with the upgrade
to the 50 caliber gun, they expect nearly the same combat
effectiveness from the smaller ship.
On paper the throwwieght is 91% the same, but with the improvements in sectional density and better arcs, they expect no functional difference.

End Belt
From 1.8m to -1.7m, Intended to keep exploding shells from turning the ship ends into a colander.


Main Belt Armor 
This embraces "all or nothing", but only has 1 deck level unprotected.

This Belt Armor is figured in an overly complex manner.

From 1.8m to - 1.2m it is 350mm thick.
From 1.2m to -3.2m it tapers from 350mm to 200mm

This gives an untapered upper section (A) of 3m x350
The lower section is the untaped 200mm piece (B) and the wedge tapering from 350->200. (C)

(A) 3m x 350 = 1050
(B) 2m x 200 = 400
(C)  2m wedge from 350 to 200 = 1/2 b x h  means 150/2 x 2m =150

Over 5m this is an averaged thickness of 320mm.
Adjusting for a 350mm Thickness, this is a 4.57m height
(320/350 * 5 = 4.57)

The Armor is Outsloped at 15 degrees
4.57 / cos 15 = 4.62334374
= 4.63m adjusted height at 350mm thickness.


Deck Armor
35/130/130 is 4,617tons
35mm box over the magazines is 121tons
For a total of 4,738 tons
Which takes a Fore&Aft thickness of 133.9

TDS
1.5m external bulges from keel to bottom of belt at -2.5m.
4.5m internal bulges from keel and raised to the underside of the Armor deck at 1.8m above waterline.

TDS : (9) Bulge (mild hull), liquid (19mm) void (19), liquid armored (2x19=38mm), Dam control & flooding corridor(mild)


There is a 35mm Box around the magazines this adds 130 tons,
boosting total deck to 4574


200t Reserve Wt

519t Fire Control
25  LR Radio

25 kite balloon
37t Additional fire suppresion
37t CO2 Air conditioning
25 Hulesmeyer device
25 Searchlight tower

37   Extra pumps
323 turbo electric
185 torpedo nets


Decks
+4.3  Weather deck
+1.8  Main Deck :
          Top of Main Belt 360mm
           Armor Deck 125mm , top of TDS.
-0.7   3rd Deck
          -2.5 Main belt 350, tapers to 300mm
-3.2  2nd Deck, Bottom main belt 300mm.
-5.7  1st Deck
-8.2   Engineering
-9.16 Double Bottom

[Kaiser Kirk]

If I'm delaying the Kalifern class,
then I should get started on a new armored cruiser.

I realize many folks are building 27-30,0000 ton plus ships for that role.

However, for something designed to be risked on scouting expeditions, or kill enemy cruisers, or serve as a raider,
30,000 tons seems like a great deal. 

So what are the design parameters ?
I'd like to put holes in opposing cruisers at long range. By now I should know the older Byzantine ACs have 200mm belts,
So ..that at the edge of FC, or 18km.
The existing 300L41 gun was one option, but with the new gun tech, I developed the 255L47.
The new 255L47 gun with a heavy shell should be able to punch a hole in Byzantine 200mm belts at 18km.
And I'd like 10 of those....8 minimum. With the slightly higher ROF of a 10" vs. 12" I could likely do 6 of them.

Speed -
Speed has been annoying, each generation of ships is faster. I need 29 or 30knots minimum, but if I can get more, that's good.
Speed is tied to dock length. Particularly the dock length in the territories.  Because I want to maintain and repair my ships. 
I have 160m and 190m docks in my territories. So I need a hull that will fit 190m, and then as much speed as I can manage.
Here I ramped it up to 31knots, and 9500nm, so a good radius of action.

Protection -
I'd love to have an upper belt proof against QF weapons, but since I should be able to quickly kill smaller cruisers, I think I can save the tonnage.
The main belt is still backed by a protective deck, giving me effectively over 220mm of waterline armor - before the outsloped belt.

The Deck armor , at 65mm, can stop splinters up to 390mm, and will exclude even 381mm shells under ~21,000m. However ships with those guns are not the desired foe. If they have to fight such, charging to close the range, or trying for a night battle is preferred. 6x343 will have a lower ROF  and once both sides can penetrate, the 255 may suffice. This is where 6x 300L41 or 4x 345L40 was considered.

TDS :For a ship this size, especially with the swelling submarine and MTB ranks, I want a TDS.
That requires the beam to use it, which makes speed harder to attain..... fitting the TDS added a lot to the displacement.
Sadly it only adds 1 torpedo to the damage absorption, but it should stop the automatic critical damage.

Overall I could have the same basic ship without TDS for 16500 tons, but it would be 2.2torps, and any hit would crit.

Torpedo nets :
This does not have torpedo nets.
At this stage I'm the only one with them, and would like to have them.
Others may wonder why.
The 1890s nets limited speed to like 6 knots, but from the late 1890s on they could do like 15knts. Which was still below battleline speed. However, they only took a couple minutes to deploy.

They were tested and passed very well in the Russo-Japanese war. They could render all but the extreme ends of the ship 'safe'.
They fell out of use historically when net-cutters allowed German sub to take down a Net Panel and sink a battleship at Gallipoli.
BUT..that took multiple shots at the same panel.

There was a worry they could come off due to battle damage and foul a propeller.
Granted, that never happened, but my newer battleships are all electric drive and can idle 1 propellor.
Meanwhile the external and internal bulges rendered occasional torpedo hits manageable.

Here, both the Sino-Japanese war, and the Aztec-Roman war, you've seen lots of torpedoes in the water.
Saturation of defenses can lead to some torpedoes slamming home.

Likewise, surprise attacks to start seem possible, and being able to deploy nets to compensate for ships being out of position.

At which point I find I've been explaining why the Kaliferns do.
The Zemakas, though, should be able to sprint away from mass attacks, or manuever and elude.
The occasional hit should be survivable due to the TDS>

Anyhow enough blathering :

Zemaka - Winter Storm, Parthian Armored Cruiser laid down 1920

Displacement:
   18,500 t light; 19,516 t standard; 21,342 t normal; 22,803 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 / 31.11 ft)
   (189.29 m / 187.00 m) x 24.00 m (Bulges 25.00 m)  x (9.00 / 9.48 m)

Armament:
      8 - 10.04" / 255 mm 47.0 cal guns - 601.86lbs / 273.00kg shells, 161 per gun
     Breech loading guns in turret on barbette mounts, 1920 Model
     2 x 4-gun mounts on centreline ends, evenly spread
      12 - 4.72" / 120 mm 43.0 cal guns - 51.50lbs / 23.36kg shells, 300 per gun
     Quick firing guns in deck and hoist mounts, 1920 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
      8 - 3.54" / 90.0 mm 50.0 cal guns - 24.25lbs / 11.00kg shells, 500 per gun
     Anti-air guns in deck mounts, 1920 Model
     4 x 2-gun mounts on side ends, evenly spread
      4 raised mounts
      8 - 0.59" / 15.0 mm 60.0 cal guns - 0.11lbs / 0.05kg shells, 5,000 per gun
     Machine guns in deck mounts, 1920 Model
     4 x Twin mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 5,628 lbs / 2,553 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   7.87" / 200 mm   466.27 ft / 142.12 m   12.99 ft / 3.96 m
   Ends:   1.38" / 35 mm   147.21 ft / 44.87 m   12.99 ft / 3.96 m
     Main Belt covers 117 % of normal length
     Main Belt inclined 10.00 degrees (positive = in)

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      2.24" / 57 mm   466.27 ft / 142.12 m   27.82 ft / 8.48 m
   Beam between torpedo bulkheads 59.06 ft / 18.00 m

   - Hull Bulges:
      0.51" / 13 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   4.92" / 125 mm      8.27" / 210 mm
   2nd:   2.95" / 75 mm   1.38" / 35 mm      2.56" / 65 mm
   3rd:   0.24" / 6 mm         -               -

   - Protected deck - single deck:
   For and Aft decks: 2.56" / 65 mm
   Forecastle: 1.38" / 35 mm  Quarter deck: 2.56" / 65 mm

   - Conning towers: Forward 7.87" / 200 mm, Aft 2.56" / 65 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 122,000 shp / 91,012 Kw = 31.01 kts
   Range 9,540nm at 14.00 kts
   Bunker at max displacement = 3,286 tons

Complement:
   882 - 1,147

Cost:
   £4.072 million / $16.288 million

Distribution of weights at normal displacement:
   Armament: 1,208 tons, 5.7 %
      - Guns: 1,208 tons, 5.7 %
   Armour: 5,824 tons, 27.3 %
      - Belts: 2,048 tons, 9.6 %
      - Torpedo bulkhead: 1,077 tons, 5.0 %
      - Bulges: 213 tons, 1.0 %
      - Armament: 816 tons, 3.8 %
      - Armour Deck: 1,496 tons, 7.0 %
      - Conning Towers: 173 tons, 0.8 %
   Machinery: 4,266 tons, 20.0 %
   Hull, fittings & equipment: 6,785 tons, 31.8 %
   Fuel, ammunition & stores: 2,843 tons, 13.3 %
   Miscellaneous weights: 417 tons, 2.0 %
      - Hull below water: 37 tons
      - Bulge void weights: 185 tons
      - Hull above water: 49 tons
      - Above deck: 146 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     24,486 lbs / 11,106 Kg = 48.4 x 10.0 " / 255 mm shells or 3.8 torpedoes
   Stability (Unstable if below 1.00): 1.13
   Metacentric height 4.4 ft / 1.3 m
   Roll period: 16.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.50
   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:   16.00 %,  28.05 ft / 8.55 m,  26.41 ft / 8.05 m
      - Forward deck:   24.00 %,  26.41 ft / 8.05 m,  26.41 ft / 8.05 m
      - Aft deck:   52.00 %,  18.21 ft / 5.55 m,  18.21 ft / 5.55 m
      - Quarter deck:   8.00 %,  18.21 ft / 5.55 m,  19.69 ft / 6.00 m
      - Average freeboard:      21.65 ft / 6.60 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 116.6 %
      - Above water (accommodation/working, high = better): 144.9 %
   Waterplane Area: 32,267 Square feet or 2,998 Square metres
   Displacement factor (Displacement / loading): 110 %
   Structure weight / hull surface area: 145 lbs/sq ft or 706 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.93
      - Longitudinal: 1.76
      - Overall: 1.00
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

There are two versions, an 18000 and a 18500.
They differ slighly in BC.

The extra 500tons 'buys' :
15mm belt & Con armor 165->180
5mm deck armor 60->65
20mm turret face armor 230->250
10mm barbette armor 200->210

That seems worth 500tons.

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

While there had been hopes of fielding a 230mm gun, evaluation of it's penetration at
18km was not entirely satisfactory.  Using 18km as a standard by which cruiser sized hulls
are expected to be visible, and so full FC be effective at some point, the desire is
to start to punch holes in cruisers at that range, though decisive battle range is expected
at 14km.

The L47 has slightly less belt armor penetration compared to an L50, but somewhat better
deck penetration. The belt penetration rapidly improves as ranges close.

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


Armor :
The main battery has heavier armor than the belt,
reflecting that the belt has the protective deck behind it.

The first true foray into "All or Nothing"

The Protective Deck is from 0.65m down to -1.8m

The belt rises 1.25m over the belt and descends
to 2m for 3m total.

The Belt is from 1.9m to -2.0m
A distance of 3.9, but is inclined 10deg so needs 3.96
(3.9 / cos(10) = 3.960 = 3.96.)

Giving an unarmored freeboard of 4.4m.

The 60mm deck will defeat splinters up to 360mm.

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 :
185- Reserve wt.

AD :
121 - FC
25 - LR radio

OD :
50t - 2 Kite balloons

HAW :
18t - CO2 Air compressor A/C
37t - Imp Fire ext.


HBW :

37t - Pumps

Decks : 2.45m for most
8.05m : Forecastle
5.55m : Weather
3.10m : Battery
            +1.90: Top Main Belt
0.65m : Main - Protective 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

Ed : posted proper version.

[The Rock Doctor]

Looks very capable. 

[Kaiser Kirk]

Pregame, I envisioned a navy that had transitioned from a shore defense & commerce warfare role to a more traditional battlefleet.
With the advent of QF weapons, I built a series of large protected cruisers that were to serve in either.

Refurbishing them takes roughly the cost of new construction, but saves half the industry effort.
Since BP is the limiter for Parthia, that's ok.

The first was PC-1 Shabfang and PC-2 Shabriz. which mean something I forget.

https://www.navalism.org/index.php/topic,7046.0.html

This is the refurbished PC-1

Cost Basis :
A)  20% of original cost
B)  Armament and machinery , BP cost = (tonnage/1000); $ cost = twice the BP cost.
C ) Armor and functional miscellaneous weight, BP cost = (tonnage/1000); $ cost is equal to BP cost.
D)  Hull, fittings & equipment, No BP cost; $ cost is equal to (tonnage/5000)
E)  Fuel, ammunition & stores; non-functional miscellaneous weight  , No BP cost; $ cost is (tonnage/2000).

A) $1.198 ,    0 BP   = $5.99 * 0.2
B) $3,734   ,1.867BP   = 2*$(0.291+1.576), (0.291+1.576) BP
C) $1.074 ,1.074BP    = $(0.388+0.096+ 0.59) ,  (0.388+0.096+ 0.59) BP
D) N/A
E)$0.814, 0 BP            =  ((1470+98+60)/2000)
-----------
$6.82, 2.941 BP

PC-1 Shabrang R1920, Parthia Protected Cruiser laid down 1900 (Engine 1920)

Displacement:
   5,963 t light; 6,202 t standard; 7,019 t normal; 7,672 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (492.13 ft / 475.72 ft) x 47.57 ft x (21.33 / 22.83 ft)
   (150.00 m / 145.00 m) x 14.50 m  x (6.50 / 6.96 m)

Armament:
      6 - 7.09" / 180 mm 43.0 cal guns - 187.39lbs / 85.00kg shells, 140 per gun
     Breech loading guns in deck and hoist mounts, 1913 Model
     2 x Single mounts on centreline ends, evenly spread
     4 x Single mounts on side ends, evenly spread
      4 - 3.54" / 90.0 mm 50.0 cal guns - 24.25lbs / 11.00kg shells, 200 per gun
     Anti-air guns in deck and hoist mounts, 1911 Model
     2 x Single mounts on sides forward
      2 raised mounts
     2 x Single mounts on sides amidships
      2 raised mounts
      8 - 0.59" / 15.0 mm 60.0 cal guns - 0.11lbs / 0.05kg shells, 500 per gun
     Machine guns in deck mounts, 1904 Model
     4 x Twin mounts on side ends, evenly spread
      4 double raised mounts
      Weight of broadside 1,222 lbs / 554 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   2.56" / 65 mm   437.99 ft / 133.50 m   12.01 ft / 3.66 m
   Ends:   Unarmoured
     Main Belt covers 142 % of normal length

   - Hull void:
      0.00" / 0 mm     0.00 ft / 0.00 m   0.00 ft / 0.00 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   3.94" / 100 mm   1.38" / 35 mm      2.95" / 75 mm
   2nd:   0.79" / 20 mm         -               -
   3rd:   0.24" / 6 mm         -               -

   - Protected deck - multiple decks:
   For and Aft decks: 2.36" / 60 mm
   Forecastle: 0.98" / 25 mm  Quarter deck: 1.38" / 35 mm

Protective Deck : Laminate 35mm onto existing Protective deck, both citadel and quarterdeck.
Laminations are 80% effective, so this adds
28mm
Forecastle : 25 slopes and crown
Citadel : 118 slopes and 53 crown
quarterdeck : 35mm slopes and crown


   - Conning towers: Forward 3.54" / 90 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 2 shafts, 45,083 shp / 33,632 Kw = 28.25 kts
   Range 8,300nm at 14.00 kts
   Bunker at max displacement = 1,470 tons

Complement:
   383 - 498

Cost:
   £0.534 million / $2.134 million

Distribution of weights at normal displacement:
   Armament: 292 tons, 4.2 %
      - Guns: 292 tons, 4.2 %
   Armour: 1,309 tons, 18.6 %
      - Belts: 522 tons, 7.4 %
      - Armament: 96 tons, 1.4 %
      - Armour Deck: 663 tons, 9.5 %
      - Conning Tower: 28 tons, 0.4 %
   Machinery: 1,576 tons, 22.5 %
   Hull, fittings & equipment: 2,045 tons, 29.1 %
   Fuel, ammunition & stores: 1,055 tons, 15.0 %
   Miscellaneous weights: 741 tons, 10.6 %
      - Hull below water: 564 tons
      - Hull void weights: 60 tons
      - Hull above water: 31 tons
      - On freeboard deck: 51 tons
      - Above deck: 35 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     7,671 lbs / 3,479 Kg = 43.1 x 7.1 " / 180 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.19
   Metacentric height 2.3 ft / 0.7 m
   Roll period: 13.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 51 %
         - Recoil effect (Restricted arc if above 1.00): 0.49
   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): 0.509 / 0.520
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 21.81 kts
   Power going to wave formation at top speed: 56 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 14.00 degrees
   Stern overhang: 9.84 ft / 3.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   4.00 %,  20.54 ft / 6.26 m,  20.54 ft / 6.26 m
      - Forward deck:   30.00 %,  20.54 ft / 6.26 m,  20.54 ft / 6.26 m
      - Aft deck:   62.00 %,  12.34 ft / 3.76 m,  12.34 ft / 3.76 m
      - Quarter deck:   4.00 %,  12.34 ft / 3.76 m,  12.34 ft / 3.76 m
      - Average freeboard:      15.12 ft / 4.61 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 96.4 %
      - Above water (accommodation/working, high = better): 113.5 %
   Waterplane Area: 15,203 Square feet or 1,412 Square metres
   Displacement factor (Displacement / loading): 113 %
   Structure weight / hull surface area: 85 lbs/sq ft or 415 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.48
      - Overall: 1.01
   Adequate machinery, storage, compartmentation space
   Adequate accommodation and workspace room

Completed in 1901, the PC-1 Class was powerful for it's time, but very dated in 1920.

Since the base hull tech is pre 1900, the comp hull has to stay 1.0 or more.

The idea is to refit it into a 'competive' cruiser.

Stylistic Disclosure-
I changed the bow from -15 to +15.
as far as I know it just changes the picture on the Freeboard tab.
I like the 'Cleaver' better.


The Old
Old engine is 2867 tons Complex Compound
Old Bunker is 1481
old deck armor is 275t

New engine if a compound is capped at
27.422knots and 2,346tons - can not have more SHP.

If limited to 26 to escort the new Stormbringer class, then only 1899 tons is used.

Conversion to Oil Firing with a turbogenerator
27.422 knots then is 1399tons, +349.75 for the turbogenerator, or 1749, saving 600 tons.

Refurbishment :
Engine -> oil fired electric drive, 1.576t
+ Turbogenerator 394t

Bunker :->1470t oil fuel

Protective Deck : Laminate 35mm onto existing Protective deck, both citadel and quarterdeck.
Laminations are 80% effective, so this adds
28mm
Forecastle : 25 slopes and crown
Citadel : 118 slopes and 53 crown
quarterdeck : 35mm slopes and crown
+388tons

All New
Guns & Mount- 291t
Gun armor - 96t
magazine -98t

Remove and Plate over submerged tubes

Misc Wt

10t - FC
25t - LR Radio

25t- Searchlight Tower
36t - 4T3 21" TT tubes

6t - CO2 Air Compressor A/C
25t - Enhanced Fire Suppression


25t - Enhanced Pumps
145t- Torpedo nets
394t- Turboelectric drive

Decks :

+5.26 Forecastle deck
+3.76 Weather Deck
+1.26 2nd deck, top of main belt, protective deck
-1.24  Bottom of main belt, 1st deck
-5.74  Engineering Deck

[Kaiser Kirk]

Pregame, I envisioned a series of 'scout cruisers' that would extend right up to start.
But I found that I had little appetite for weak, unarmored 3000 ton cruisers.
So as I trimmed my pre-game builds, I wound up with only 5, not ~12.

Having explored turning a 9000 ton Bucephalus into a 'Sentry Cruiser',
I decided that a much cheaper way for similar results is upgrading this.

https://www.navalism.org/index.php/topic,7045.0.html

This is the refurbished SC-3 & SC-4 "Scythian" class

Completed in 1899, the Scythian class became rapidly outdated as engine tech changed.

Part of the Early stacked casement forward armament, they were completed with a high forecastle to keep the forward casements dry.

The Parthians view this as an opportunity to try a small hull 'sentry ship' design. This will serve as a picket for the Battleline, and given +4knots to allow positioning.
Batteries, like on a submarine, will be fitted to allow silent 'creep'.

The ship will be given depth charges and ASW sensors to evaluate the ability of larger vessels such as this to  engage in ASW work

Armament will be revised to allow engagement of charging torpedo craft, but against cruisers the ship will remain behind friendly cruisers.

Since I could cram another 500 tons of misc wt into it, consideration was given to outfitting as a Sub tender, it was decided not to blur the roles.

The end costs about the same as new construction, but at half the materials cost.

Cost Basis :
A)  20% of original cost
B)  Armament and machinery , BP cost = (tonnage/1000); $ cost = twice the BP cost.
C ) Armor and functional miscellaneous weight, BP cost = (tonnage/1000); $ cost is equal to BP cost.
D)  Hull, fittings & equipment, No BP cost; $ cost is equal to (tonnage/5000)
E)  Fuel, ammunition & stores; non-functional miscellaneous weight  , No BP cost; $ cost is (tonnage/2000).

A) Original Cost $2.999

B) Engines and Armanent
New Turbo-Electric engines 100% oil : 636t
90mm replaced with 120mm
45mm replaced with 90AA
Total gun+mount: 113t

C) Armor and Functional Misc Wt
Turbogenerators : 159t
Gun Spray Shield : 5t
Magazine box unchanged, still 15t
Functional Misc Wt  : 569t

D)Hull fittings & equip :
Unchanged

E) Fuel, Ammunition
Fuel : 1339t ~23days at cruising spd
Mag : 78t

Subtotals

A) $0.5998
B) $1.498, 0.749 BP
C) $0.733, 0.733 BP
D) N/A
E) $0.7085

Total :
$3.5393, 1.842 BP

1899 Scout Cruiser Ninlil II, Parthian Scout Cruiser laid down 1899 (Engine 1920)

Displacement:
   2,982 t light; 3,138 t standard; 3,882 t normal; 4,477 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (393.47 ft / 387.14 ft) x 41.01 ft x (15.09 / 16.94 ft)
   (119.93 m / 118.00 m) x 12.50 m  x (4.60 / 5.16 m)

Armament:
      8 - 4.72" / 120 mm 43.0 cal guns - 55.12lbs / 25.00kg shells, 200 per gun
     Quick firing guns in deck mounts, 1913 Model
     4 x Single mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
     4 x Single mounts on side ends, evenly spread
      4 - 4.72" / 120 mm 43.0 cal guns - 55.12lbs / 25.00kg shells, 160 per gun
     Quick firing guns in casemate mounts, 1913 Model
     4 x Single mounts on sides, forward evenly spread
      4 hull mounts in casemates- Limited use in heavy seas
      2 - 3.54" / 90.0 mm 50.0 cal guns - 23.55lbs / 10.68kg shells, 350 per gun
     Anti-air guns in deck mounts, 1911 Model
     2 x Single mounts on sides amidships
      2 raised mounts
      Weight of broadside 709 lbs / 321 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.24" / 6 mm         -               -
   3rd:   0.24" / 6 mm         -               -

   - Box over magazines:
   0.98" / 25 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 3 shafts, 18,186 shp / 13,567 Kw = 24.00 kts
   Range 7,800nm at 16.00 kts
   Bunker at max displacement = 1,339 tons

Complement:
   245 - 319

Cost:
   £0.224 million / $0.897 million

Distribution of weights at normal displacement:
   Armament: 113 tons, 2.9 %
      - Guns: 113 tons, 2.9 %
   Armour: 20 tons, 0.5 %
      - Armament: 5 tons, 0.1 %
      - Armour Deck: 15 tons, 0.4 %
   Machinery: 636 tons, 16.4 %
   Hull, fittings & equipment: 1,644 tons, 42.3 %
   Fuel, ammunition & stores: 899 tons, 23.2 %
   Miscellaneous weights: 569 tons, 14.7 %
      - Hull below water: 334 tons
      - Hull above water: 38 tons
      - On freeboard deck: 135 tons
      - Above deck: 62 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     6,623 lbs / 3,004 Kg = 125.6 x 4.7 " / 120 mm shells or 1.4 torpedoes
   Stability (Unstable if below 1.00): 1.18
   Metacentric height 1.8 ft / 0.5 m
   Roll period: 12.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 83 %
         - Recoil effect (Restricted arc if above 1.00): 0.36
   Seaboat quality  (Average = 1.00): 1.67

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.567 / 0.583
   Length to Beam Ratio: 9.44 : 1
   'Natural speed' for length: 19.68 kts
   Power going to wave formation at top speed: 54 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   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 %,  23.62 ft / 7.20 m,  21.65 ft / 6.60 m
      - Forward deck:   30.00 %,  21.65 ft / 6.60 m,  19.69 ft / 6.00 m
      - Aft deck:   35.00 %,  11.48 ft / 3.50 m,  11.48 ft / 3.50 m
      - Quarter deck:   15.00 %,  11.48 ft / 3.50 m,  11.48 ft / 3.50 m
      - Average freeboard:      16.43 ft / 5.01 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 73.2 %
      - Above water (accommodation/working, high = better): 137.6 %
   Waterplane Area: 11,258 Square feet or 1,046 Square metres
   Displacement factor (Displacement / loading): 180 %
   Structure weight / hull surface area: 85 lbs/sq ft or 414 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.25
      - Longitudinal: 3.02
      - Overall: 1.36
   Excellent 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

Completed in 1899, the Scythian class became rapidly outdated as engine tech changed.

Part of the Early stacked casement forward armament, they were completed with a high forecastle to keep the forward casements dry.

The Parthians view this as an opportunity to try a small hull 'sentry ship' design. This will serve as a picket for the Battleline, and given +4knots to allow positioning.
Batteries, like on a submarine, will be fitted to allow silent 'creep'.

The ship will be given depth charges and ASW sensors to evaluate the ability of larger vessels such as this to  engage in ASW work

Armament will be revised to allow engagement of charging torpedo craft, but against cruisers the ship will remain behind friendly cruisers.

While consideration was given to outfitting as a Sub tender, it was decided not to blur the roles.

The old
Old Engine is 1644t Complex
Old Bunker is 1367t Oil/Coal
Old armor is 'box over magazines' at 15tons.

A) Original Cost $2.999

B) Engines and Armanent
New Turbo-Electric engines 100% oil : 636t
90mm replaced with 120mm
45mm replaced with 90AA
Total gun+mount: 113t

C) Armor and Functional Misc Wt
Turbogenerators : 159t
Gun Spray Shield : 5t
Magazine box unchanged, still 15t
Functional Misc Wt  : 569t

D)Hull fittings & equip :
Unchanged

E) Fuel, Ammunition
Fuel : 1339t ~23days at cruising spd
Mag : 78t


Miscellaneous Weight :
30t - Void

12t FC
25t LR Radio
25t Searchlight tower

25t Kite Balloon
25t Hulesmeyer device
25t War Tuba
60t Depth Charges 1915

25t Enhanced Fire Suppression
3t  CO2 Air Compressors

120t Torpedo nets
25t   Additional pumps
159t Turbogenerator
15t   Enhanced Hydrophones
15t   Batteries

Edit : added misc wt, included the base cost...but did it wrong the first time... Forgot *20%, was paying full. No wonder the total seemed high.

[Kaiser Kirk]

The 1902 Samaritan class was the last of my scout cruisers, and the Turbine test bed.

The 1902 SC-5 Samaritan Class was such a repeat, I used the 1899 Springsharp, with a 1902 turbine engine...and was marginally faster.
Otherwise, it was a repeat of the 1899 SC-3 class,

Because it had the early turbine, unlike the 1899 class, turbo-electric drive is not needed.
But silent running on Batteries has some appeal still.  The additional 159t func wt cost is trivial.

For one thing, if you're trying to use enhanced hydrophones to "hear" screws over the horizon, being able to shut down and creep on electrics is a distinct advantage.

Like the other 2 it has torpedo nets...why?
Because in the various wars, we see swarms of torpedo craft in islands. Parthia is unsure how effective long range acoustics (over or undersea) or radio proximity detection will be around islands, and the kite balloon won't work at night.  The slow picket ship, advanced towards the general direction of the foe, might be overrun. But the nets still should work vs. poorly aimed torpedos - even net cutters need multiple hits to a panel to work, so that gives it some protection at a low low cost.

A) Original Cost $3.000

B) Engines and Armanent
New Turbo-Electric engines 100% oil : 636t
90mm replaced with 120mm
45mm replaced with 90AA
Total gun+mount: 113t

C) Armor and Functional Misc Wt
Turbogenerators : 159t
Gun Spray Shield : 5t
Magazine box unchanged, still 15t
Functional Misc Wt  : 569t

D)Hull fittings & equip :
Unchanged

E) Fuel, Ammunition
Fuel : 1339t ~23days at cruising spd
Mag : 78t

Subtotals
A) $.60
B) $1.498, 0.749 BP
C) $0.733, 0.733 BP
D) N/A
E) $0.7085

Total :
$3.5395, 1.842 BP

1902 Samaritan, Parthian Scout Cruiser laid down 1902 (Engine 1920)

Displacement:
   2,982 t light; 3,138 t standard; 3,882 t normal; 4,477 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (393.47 ft / 387.14 ft) x 41.01 ft x (15.09 / 16.94 ft)
   (119.93 m / 118.00 m) x 12.50 m  x (4.60 / 5.16 m)

Armament:
      8 - 4.72" / 120 mm 43.0 cal guns - 55.12lbs / 25.00kg shells, 200 per gun
     Quick firing guns in deck mounts, 1913 Model
     4 x Single mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
     4 x Single mounts on side ends, evenly spread
      4 - 4.72" / 120 mm 43.0 cal guns - 55.12lbs / 25.00kg shells, 160 per gun
     Quick firing guns in casemate mounts, 1913 Model
     4 x Single mounts on sides, forward evenly spread
      4 hull mounts in casemates- Limited use in heavy seas
      2 - 3.54" / 90.0 mm 50.0 cal guns - 24.25lbs / 11.00kg shells, 350 per gun
     Quick firing guns in deck mounts, 1911 Model
     2 x Single mounts on sides amidships
      2 raised mounts
      Weight of broadside 710 lbs / 322 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.24" / 6 mm         -               -
   3rd:   0.24" / 6 mm         -               -

   - Box over magazines:
   0.98" / 25 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 4 shafts, 18,186 shp / 13,567 Kw = 24.00 kts
   Range 7,800nm at 16.00 kts
   Bunker at max displacement = 1,339 tons

Complement:
   245 - 319

Cost:
   £0.224 million / $0.897 million

Distribution of weights at normal displacement:
   Armament: 113 tons, 2.9 %
      - Guns: 113 tons, 2.9 %
   Armour: 23 tons, 0.6 %
      - Armament: 6 tons, 0.1 %
      - Armour Deck: 18 tons, 0.5 %
   Machinery: 636 tons, 16.4 %
   Hull, fittings & equipment: 1,611 tons, 41.5 %
   Fuel, ammunition & stores: 900 tons, 23.2 %
   Miscellaneous weights: 599 tons, 15.4 %
      - Hull below water: 334 tons
      - Hull void weights: 30 tons
      - Hull above water: 38 tons
      - On freeboard deck: 135 tons
      - Above deck: 62 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     6,646 lbs / 3,015 Kg = 126.1 x 4.7 " / 120 mm shells or 1.4 torpedoes
   Stability (Unstable if below 1.00): 1.18
   Metacentric height 1.8 ft / 0.5 m
   Roll period: 12.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 84 %
         - Recoil effect (Restricted arc if above 1.00): 0.36
   Seaboat quality  (Average = 1.00): 1.67

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.567 / 0.583
   Length to Beam Ratio: 9.44 : 1
   'Natural speed' for length: 19.68 kts
   Power going to wave formation at top speed: 54 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   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 %,  23.62 ft / 7.20 m,  21.65 ft / 6.60 m
      - Forward deck:   30.00 %,  21.65 ft / 6.60 m,  19.69 ft / 6.00 m
      - Aft deck:   35.00 %,  11.48 ft / 3.50 m,  11.48 ft / 3.50 m
      - Quarter deck:   15.00 %,  11.48 ft / 3.50 m,  11.48 ft / 3.50 m
      - Average freeboard:      16.43 ft / 5.01 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 73.2 %
      - Above water (accommodation/working, high = better): 137.6 %
   Waterplane Area: 11,258 Square feet or 1,046 Square metres
   Displacement factor (Displacement / loading): 177 %
   Structure weight / hull surface area: 83 lbs/sq ft or 406 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.24
      - Longitudinal: 2.99
      - Overall: 1.35
   Excellent 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

The 1902 SC-5 Samaritan Class
is a repeat of the 1899 SC-3 class,
but served as the Turbine testbed.

Unlike the 1899 class, turbo-electric drive is not needed.
But silent running on Batteries has some appeal still.

For one thing, if you're trying to use enhanced hydrophones to "hear" screws over the horizon, being able to shut down and creep on electrics is a distinct advantage.

Old :
Engine : 1775
Bunker : 1360
Box over mag : 15t

Costs : Exactly the same.

Misc Wt -
30t Void

12t FC
25t LR Radio
25t Searchlight tower

25t Kite Balloon
25t Hulesmeyer Device
25t War Tuba
60t Depth Charges 1915

25t Enhanced Fire Suppression
3t  CO2 Air Compressors

120t Torpedo Nets
25t  Additional Pumps
159t Turbogenerator
15t  Hydrophone
15t  Batteries.

edit : fixed overpayment for A.

[TacCovert4]

I'm in a lot of the same boat as you.  My own SC-1 class of 3 ships (remaining) is sort of on the verge of being a viable destroyer leader unit, but they're also pretty horrendously undergunned, small, and whatnot.  I've been debating whether to just relegate them to being a light escort in their current configuration, or spending the money to do the update to them.

[Kaiser Kirk]

The biggest 'expense' is engines, followed by armor.
If you are trying for 'current fleet speed' which is likely 27-28knots, and moving up.

Refitting and leaving them slow - not horrendous.
Refitting and making them fast - more pricy.

I thought I could save by simply putting in new reciprocating and not upgrading to turbo-electric.
But the turbines weigh less, and the turbogenerators fall under 'functional misc wt'. The entire thing
is cheaper than the equivalent power reciprocating. 

Armament tonnage is surprisingly little, even on the Armored cruisers.
So if you've built newer weapons, it can worth it.

Key information - while the larger guns scale ME to Caliber, the 12" and less do not. ME increases much faster than caliber, reflecting the 1880-1905 improvements in powder, pressures and shell form/length/weight. Turrets also got faster at feed & training so better ROFs.  Which makes replacing my old L40 guns with a smaller but longer and more modern pieces a 'win'. More ME, heavier shells, lower cross-section, better sectional density, better performance at range.  Which is why I researched a series in 1913, expecting to do these refurbishments in 1915-1916.

So it's coming down to combat roles.
The PCs I'd like to be able to function as normal cruisers. Jefgte is putting 191mm on lots of designs, out East the Japanese like 8", so I'm using my 180mm.
With the Bucephalus the cost was mainly engines, a tiny bit guns, but the result was still inadequately armored..and that armor would be simple nickle-steel.  Those 191mm guns would ventilate it.  Plus I think Jefgte has a point about being 'to old'. Metallurgy changed allot in the mid 1890s, and there should be a qualitative difference between the 1894 and 1899 ships.
So for a combat role, they were too old and weak. The next Armored Cruiser Class, the Sparabara, has a 60mm deck and better belt, so I think I can make that viable, but I need to browse others Encyclopedias a bit to double check.


The SCs, they mean I do not need to build as many sentry frigates.
For the Main Fleet, Atlantic Fleet, and Pacific Fleets, I want at least 2 sentries, so they can leap frog and drift to listen for screws in transit, or anchor at opposite sides at rest.
That does not require high speed. So I can skimp on the costly engines.
For the Main fleet I would like spares as well. So I need like 8 'Sentry' vessels total, the SCs can be 1 per fleet, saving me 3 Bakr Frigates.

[Jefgte]

...The PCs I'd like to be able to function as normal cruisers. Jefgte is putting 191mm on lots of designs, out East the Japanese like 8", so I'm using my 180mm...

The standard armament of Byzantine scout cruisers is 6x191, now in 2xT3 turrets (ala Panzerschiff)+ 6 or 8x120.

...Plus I think Jefgte has a point about being 'to old'. Metallurgy changed allot in the mid 1890s, and there should be a qualitative difference between the 1894 and 1899 ships...

I will however rebuild the SC3 class (Constanta) commissioned in 1904 to 27kts + new 191 HMS Hawkins guns.
1904-1921, It's really the ultimate borderline.

[Desertfox]

At this time I only have four 24kt PCs with 4x8" guns and some old ACs, only one of which can do 24kts. That said if the Parthians are paying attention, Japan did start developing a 8"/50 twin gun...

I like the idea of ASW picket cruisers, kind of like what I am doing with the old Chihayas.

[Kaiser Kirk]

Unofficially, I did note the twin 8".  BUT, I try hard not to act on stuff that's not afloat.
As for the stuff afloat, I wasn't sure what the Japanese planned for the future, but you use the 8" and I kinda figured that would continue.
It seemed unlikely you would suddenly upgun to 9" or downgrade to 7", folks tend to stay about the same.
So...8" is reasonable, and 8" vs 191mm...close enough for lumping in the same evaluation.

Most of my planning focus is Byzantine, but I do peek at other fleets also. Not as much as I'd like.
But  I have noticed a growing number of Byzantine ships with the 6x 191 arrangement.

Which is disturbing.

I really expected most players would have Cruisers more like the Romans.  I figured I'd go with fewer but slightly beefier. My 165mm is a good heavy gun, and for the FC ranges
we had, just fine. With the wars we've had, with lots of torpedo craft, it seemed a better choice than my 180mm.

So I've moved generally down to 165mm, then turn around and see the Byzantines fielding more 191mm...while FC ranges keep moving up, making that gun more valuable.

So the PC rebuilds use the 1913 180mm, decent shell, good MV, and good train rate. I may wind up making a new 180mm with a heftier shell, but for now this will work.
The newer PCs will be able to have the newer 0.9 hull, and so the superimposed "B" and "Y" guns, for a 6 gun broadside.

[Kaiser Kirk]

Just to share,
I've been tinkering with a future cruiser design, now variant "H".
Not sure on the year, I'm working on the Tech, but could finish in HY2 1921, or HY2 1922.

But yes, twin larger guns look to be in my future.

Oh, and I'd like to note the 8000tons standard is just an odd and unexpected number.
I'd really like this to come in at 7500 light.
Well actually I'd like the same ship at 6000 light, but that doesn't seem doable.

Valiant, Parthian 1920 Cruiser Tech laid down 1923

Displacement:
   7,598 t light; 8,000 t standard; 8,868 t normal; 9,562 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (524.67 ft / 518.37 ft) x 53.31 ft x (21.85 / 23.15 ft)
   (159.92 m / 158.00 m) x 16.25 m  x (6.66 / 7.06 m)

Armament:
      8 - 7.09" / 180 mm 43.0 cal guns - 187.39lbs / 85.00kg shells, 200 per gun
     Breech loading guns in deck and hoist mounts, 1923 Model
     4 x 2-gun mounts on centreline, evenly spread
      2 raised mounts
      8 - 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, 1923 Model
     4 x 2-gun mounts on side ends, evenly spread
      4 raised mounts
      16 - 0.59" / 15.0 mm 60.0 cal guns - 0.11lbs / 0.05kg shells, 5,000 per gun
     Machine guns in deck mounts, 1923 Model
     8 x Twin mounts on sides, evenly spread
      8 double raised mounts
      Weight of broadside 1,695 lbs / 769 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   4.72" / 120 mm   368.04 ft / 112.18 m   13.62 ft / 4.15 m
   Ends:   Unarmoured
     Main Belt covers 109 % of normal length
     Main Belt inclined -15.00 degrees (positive = in)

   - Hull void:
      0.00" / 0 mm     0.00 ft / 0.00 m   0.00 ft / 0.00 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   5.91" / 150 mm   1.77" / 45 mm      5.71" / 145 mm

   - Protected deck - single deck:
   For and Aft decks: 1.77" / 45 mm
   Forecastle: 1.38" / 35 mm  Quarter deck: 1.77" / 45 mm

   - Conning towers: Forward 5.51" / 140 mm, Aft 1.77" / 45 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 3 shafts, 73,692 shp / 54,974 Kw = 31.00 kts
   Range 7,880nm at 14.00 kts
   Bunker at max displacement = 1,562 tons

Complement:
   456 - 594

Cost:
   £2.201 million / $8.805 million

Distribution of weights at normal displacement:
   Armament: 409 tons, 4.6 %
      - Guns: 409 tons, 4.6 %
   Armour: 1,739 tons, 19.6 %
      - Belts: 961 tons, 10.8 %
      - Armament: 106 tons, 1.2 %
      - Armour Deck: 605 tons, 6.8 %
      - Conning Towers: 67 tons, 0.8 %
   Machinery: 2,463 tons, 27.8 %
   Hull, fittings & equipment: 2,618 tons, 29.5 %
   Fuel, ammunition & stores: 1,271 tons, 14.3 %
   Miscellaneous weights: 369 tons, 4.2 %
      - Hull below water: 40 tons
      - Hull void weights: 65 tons
      - Hull above water: 38 tons
      - On freeboard deck: 135 tons
      - Above deck: 91 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     7,504 lbs / 3,404 Kg = 42.2 x 7.1 " / 180 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.11
   Metacentric height 2.4 ft / 0.7 m
   Roll period: 14.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 52 %
         - Recoil effect (Restricted arc if above 1.00): 0.69
   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): 0.514 / 0.523
   Length to Beam Ratio: 9.72 : 1
   'Natural speed' for length: 22.77 kts
   Power going to wave formation at top speed: 59 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 14.00 degrees
   Stern overhang: -3.28 ft / -1.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   19.00 %,  25.26 ft / 7.70 m,  22.64 ft / 6.90 m
      - Forward deck:   44.00 %,  22.64 ft / 6.90 m,  20.34 ft / 6.20 m
      - Aft deck:   27.00 %,  12.14 ft / 3.70 m,  12.14 ft / 3.70 m
      - Quarter deck:   10.00 %,  12.14 ft / 3.70 m,  13.78 ft / 4.20 m
      - Average freeboard:      18.53 ft / 5.65 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 107.7 %
      - Above water (accommodation/working, high = better): 139.7 %
   Waterplane Area: 18,651 Square feet or 1,733 Square metres
   Displacement factor (Displacement / loading): 105 %
   Structure weight / hull surface area: 89 lbs/sq ft or 433 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.84
      - Longitudinal: 1.59
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room

With a long forecastle and "distributed" I was hoping for a HMS Tiger layout.
Or at least that's the idea.

Rotating weight* of each 180mm 2G mount is :  110.5t
Which is ... slow.  So a 11t power assist unit is fitted to each mount.
(*sans barbette armor)

Main belt is 4m high, from 2.2 to -1.8
This means it rises 1m above the protective deck.
Main belt is outsloped 15 degrees. =4.15m

This Outsloped 120mm belt + 45mm deck is expected to
provide superior protection than the battery or conn armor.


Misc Wieght
65t - Const Reserve

25t - LR Radio
41t - FC
25t - Searchlight Tower

36t - 4T3 21" TT
50t - 2x Kite Balloon
44t - Power Assist for Main battery
5t - Paravanes

8t - CO2 Air compressor
25t - enhanced Fire suppression

25t - Extra Pumps.
15t - Enhanced Hydrophones


Decks

+6.2  Forecastle
+3.7  Weather Deck
       +2.2 Top main belt
+1.2  Protective Deck Crown
- 1.3  Lower Edge Protective Deck
        -1.8 Bottom main belt
-5.0   Engineering
-5.94   Double Bottom

[/quote]