Alternative project of battleship proposed to the Great War Council with the same armament  of AC5 class Eupatoria

BB6, Byzantine Empire BB6 laid down 1911

Displacement:
   18 400 t light; 19 521 t standard; 20 608 t normal; 21 478 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (574,00 ft / 574,00 ft) x 84,00 ft x (24,29 / 25,14 ft)
   (174,96 m / 174,96 m) x 25,60 m  x (7,40 / 7,66 m)

Armament:
      9 - 13,50" / 343 mm 45,0 cal guns - 1 240,67lbs / 562,76kg shells, 100 per gun
     Breech loading guns in turret on barbette mounts, 1911 Model
     3 x Triple mounts on centreline ends, majority forward
      14 - 4,72" / 120 mm 45,0 cal guns - 53,02lbs / 24,05kg shells, 200 per gun
     Quick firing guns in casemate mounts, 1911 Model
     14 x Single mounts on sides, evenly spread
      4 - 3,00" / 76,2 mm 45,0 cal guns - 13,62lbs / 6,18kg shells, 200 per gun
     Quick firing guns in deck mounts, 1911 Model
     4 x Single mounts on side ends, evenly spread
      4 raised mounts
      4 - 0,30" / 7,7 mm 93,0 cal guns - 0,02lbs / 0,01kg shells, 2 000 per gun
     Quick firing guns in deck mounts, 1911 Model
     4 x Single mounts on side ends, evenly spread
      4 raised mounts
      Weight of broadside 11 963 lbs / 5 426 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12,6" / 320 mm   374,00 ft / 114,00 m   12,00 ft / 3,66 m
   Ends:   4,72" / 120 mm   200,00 ft / 60,96 m   10,00 ft / 3,05 m
   Upper:   5,50" / 140 mm   374,00 ft / 114,00 m   8,00 ft / 2,44 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Strengthened structural bulkheads:
      1,50" / 38 mm   374,00 ft / 114,00 m   22,00 ft / 6,71 m
   Beam between torpedo bulkheads 74,00 ft / 22,56 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13,4" / 340 mm   5,92" / 150 mm      12,6" / 320 mm
   3rd:   1,00" / 25 mm         -         1,00" / 25 mm
   4th:   1,00" / 25 mm         -               -
   5th:   0,50" / 13 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 2,95" / 75 mm
   Forecastle: 1,98" / 50 mm  Quarter deck: 1,98" / 50 mm

   - Conning towers: Forward 11,81" / 300 mm, Aft 5,90" / 150 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 29 000 shp / 21 634 Kw = 21,17 kts
   Range 6 000nm at 10,00 kts
   Bunker at max displacement = 1 957 tons (90% coal)

Complement:
   859 - 1 118

Cost:
   £1,903 million / $7,613 million

Distribution of weights at normal displacement:
   Armament: 2 058 tons, 10,0 %
      - Guns: 2 058 tons, 10,0 %
   Armour: 7 719 tons, 37,5 %
      - Belts: 3 513 tons, 17,0 %
      - Torpedo bulkhead: 457 tons, 2,2 %
      - Armament: 1 643 tons, 8,0 %
      - Armour Deck: 1 820 tons, 8,8 %
      - Conning Towers: 287 tons, 1,4 %
   Machinery: 1 282 tons, 6,2 %
   Hull, fittings & equipment: 6 860 tons, 33,3 %
   Fuel, ammunition & stores: 2 208 tons, 10,7 %
   Miscellaneous weights: 481 tons, 2,3 %
      - Hull below water: 70 tons
      - Hull above water: 90 tons
      - On freeboard deck: 90 tons
      - Above deck: 231 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     29 387 lbs / 13 330 Kg = 23,9 x 13,5 " / 343 mm shells or 5,0 torpedoes
   Stability (Unstable if below 1.00): 1,19
   Metacentric height 5,3 ft / 1,6 m
   Roll period: 15,4 seconds
   Steadiness   - As gun platform (Average = 50 %): 67 %
         - Recoil effect (Restricted arc if above 1.00): 0,70
   Seaboat quality  (Average = 1.00): 1,35

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0,616 / 0,620
   Length to Beam Ratio: 6,83 : 1
   'Natural speed' for length: 23,96 kts
   Power going to wave formation at top speed: 44 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 0,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20,00 %,  21,30 ft / 6,49 m,  17,60 ft / 5,36 m
      - Forward deck:   30,00 %,  17,60 ft / 5,36 m,  15,80 ft / 4,82 m
      - Aft deck:   30,00 %,  15,80 ft / 4,82 m,  15,80 ft / 4,82 m
      - Quarter deck:   20,00 %,  15,80 ft / 4,82 m,  15,80 ft / 4,82 m
      - Average freeboard:      16,73 ft / 5,10 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 78,2 %
      - Above water (accommodation/working, high = better): 129,0 %
   Waterplane Area: 35 794 Square feet or 3 325 Square metres
   Displacement factor (Displacement / loading): 98 %
   Structure weight / hull surface area: 167 lbs/sq ft or 816 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,97
      - Longitudinal: 1,35
      - Overall: 1,00
   Excellent machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Good seaboat, rides out heavy weather easily

Misc Weight 481t:
206t fire control
90t for extra pump installation
90t for climatization
25t for long range wireless
20t for 4TTx450+5 reloads
50t reserved

At first I found it intriguing combination in a small package.
Then I thought about it and realized it has 1 fewer barrel than a Enki, less armor, and newer engine, so it should be lighter.... but it's a nifty compact BB.

Unfortunately, part of that is the beam is too narrow; saving deck armor, engine and fuel weight.

Quote from: Jefgte on October 10, 2018, 04:32:47 PM
   (174,96 m / 174,96 m) x 25,60 m  x (7,40 / 7,66 m)

I really don't like that beam.
Too lazy to go down the hall to get a book, so I'll use Wikipedia :)

HMS Lion - 27m
HMS Iron Duke - 27.4m
HMS Tiger - 27.6m
HMS Erin - 27.9m

What do they have in common ?
13.5" / 45 caliber guns
...in Twin, not triples.
... discontinuous TDS only over magazines & machinery, not at barbettes, which allows a narrower beam.

What were the beams of contemporary 13.5" triples ....oh weren't any.
But there are some 14"

here's a couple from 2 nations
Pennsylvania : 29.72m
Erzatz Monarch : 28.5m

So I'd really like to see +2.5 - 3m on that beam.

You are right beam is too short with T3x13"5
26000t Ramses II is 30,5m
28500t Eupatoria is 31,8m

18800t BB6 is now 28,4m with 3T3, centreline evenly spread

Displacement:
   18 800 t light; 19 930 t standard; 21 031 t normal; 21 913 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (562,00 ft / 562,00 ft) x 92,00 ft x (23,73 / 24,54 ft)
   (171,30 m / 171,30 m) x 28,04 m  x (7,23 / 7,48 m)

Armament:
      9 - 13,50" / 343 mm 45,0 cal guns - 1 240,67lbs / 562,76kg shells, 100 per gun
     Breech loading guns in turret on barbette mounts, 1911 Model
     3 x Triple mounts on centreline, evenly spread
      14 - 4,72" / 120 mm 45,0 cal guns - 53,02lbs / 24,05kg shells, 200 per gun
     Quick firing guns in casemate mounts, 1911 Model
     14 x Single mounts on sides, evenly spread
      4 - 3,00" / 76,2 mm 45,0 cal guns - 13,62lbs / 6,18kg shells, 200 per gun
     Quick firing guns in deck mounts, 1911 Model
     4 x Single mounts on side ends, evenly spread
      4 raised mounts
      4 - 0,30" / 7,7 mm 93,0 cal guns - 0,02lbs / 0,01kg shells, 2 000 per gun
     Quick firing guns in deck mounts, 1911 Model
     4 x Single mounts on side ends, evenly spread
      4 raised mounts
      Weight of broadside 11 963 lbs / 5 426 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12,6" / 320 mm   364,00 ft / 110,95 m   12,00 ft / 3,66 m
   Ends:   4,72" / 120 mm   198,00 ft / 60,35 m   10,00 ft / 3,05 m
   Upper:   5,50" / 140 mm   364,00 ft / 110,95 m   8,00 ft / 2,44 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Strengthened structural bulkheads:
      1,50" / 38 mm   364,00 ft / 110,95 m   22,00 ft / 6,71 m
   Beam between torpedo bulkheads 80,00 ft / 24,38 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13,4" / 340 mm   5,92" / 150 mm      12,6" / 320 mm
   3rd:   1,00" / 25 mm         -         1,00" / 25 mm
   4th:   1,00" / 25 mm         -               -
   5th:   0,50" / 13 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 2,95" / 75 mm
   Forecastle: 1,98" / 50 mm  Quarter deck: 1,98" / 50 mm

   - Conning towers: Forward 11,81" / 300 mm, Aft 5,90" / 150 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 29 600 shp / 22 081 Kw = 21,13 kts
   Range 6 000nm at 10,00 kts
   Bunker at max displacement = 1 983 tons (90% coal)

Complement:
   873 - 1 135

Cost:
   £1,921 million / $7,684 million

Distribution of weights at normal displacement:
   Armament: 2 058 tons, 9,8 %
      - Guns: 2 058 tons, 9,8 %
   Armour: 7 747 tons, 36,8 %
      - Belts: 3 477 tons, 16,5 %
      - Torpedo bulkhead: 444 tons, 2,1 %
      - Armament: 1 613 tons, 7,7 %
      - Armour Deck: 1 923 tons, 9,1 %
      - Conning Towers: 291 tons, 1,4 %
   Machinery: 1 308 tons, 6,2 %
   Hull, fittings & equipment: 7 225 tons, 34,4 %
   Fuel, ammunition & stores: 2 231 tons, 10,6 %
   Miscellaneous weights: 461 tons, 2,2 %
      - Hull below water: 70 tons
      - Hull above water: 90 tons
      - On freeboard deck: 70 tons
      - Above deck: 231 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     31 837 lbs / 14 441 Kg = 25,9 x 13,5 " / 343 mm shells or 5,6 torpedoes
   Stability (Unstable if below 1.00): 1,26
   Metacentric height 6,7 ft / 2,0 m
   Roll period: 14,9 seconds
   Steadiness   - As gun platform (Average = 50 %): 72 %
         - Recoil effect (Restricted arc if above 1.00): 0,52
   Seaboat quality  (Average = 1.00): 1,33

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0,600 / 0,604
   Length to Beam Ratio: 6,11 : 1
   'Natural speed' for length: 23,71 kts
   Power going to wave formation at top speed: 45 %
   Trim (Max stability = 0, Max steadiness = 100): 54
   Bow angle (Positive = bow angles forward): 0,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20,00 %,  21,30 ft / 6,49 m,  17,60 ft / 5,36 m
      - Forward deck:   30,00 %,  17,60 ft / 5,36 m,  15,80 ft / 4,82 m
      - Aft deck:   30,00 %,  15,80 ft / 4,82 m,  15,80 ft / 4,82 m
      - Quarter deck:   20,00 %,  15,80 ft / 4,82 m,  15,80 ft / 4,82 m
      - Average freeboard:      16,73 ft / 5,10 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 78,2 %
      - Above water (accommodation/working, high = better): 134,1 %
   Waterplane Area: 37 815 Square feet or 3 513 Square metres
   Displacement factor (Displacement / loading): 100 %
   Structure weight / hull surface area: 171 lbs/sq ft or 837 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,96
      - Longitudinal: 1,40
      - Overall: 1,00
   Excellent 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

Misc Weight 461t:
206t fire control
90t for extra pump installation
90t for climatization
25t for long range wireless
18t for 3TTx450+3 reloads
32t reserved

Bagdad, Byzantine Empire RGB200 laid down 1911

Displacement:
   200 t light; 224 t standard; 235 t normal; 244 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (161,58 ft / 157,48 ft) x 26,25 ft x (4,33 / 4,45 ft)
   (49,25 m / 48,00 m) x 8,00 m  x (1,32 / 1,36 m)

Armament:
      2 - 4,72" / 120 mm 45,0 cal guns - 53,17lbs / 24,12kg shells, 200 per gun
     Quick firing guns in deck mounts, 1911 Model
     2 x Single mounts on centreline ends, evenly spread
      2 - 1,85" / 47,0 mm 45,0 cal guns - 3,19lbs / 1,45kg shells, 2 000 per gun
     Quick firing guns in deck mounts, 1911 Model
     2 x Single mounts on centreline, aft deck forward
      4 - 0,30" / 7,7 mm 50,0 cal guns - 0,01lbs / 0,01kg shells, 5 000 per gun
     Machine guns in deck mounts, 1911 Model
     4 x Single mounts on side ends, evenly spread
      Weight of broadside 113 lbs / 51 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   0,79" / 20 mm     75,46 ft / 23,00 m   3,28 ft / 1,00 m
   Ends:   0,47" / 12 mm     39,37 ft / 12,00 m   3,28 ft / 1,00 m
     42,65 ft / 13,00 m Unarmoured ends
   Upper:   0,47" / 12 mm     75,46 ft / 23,00 m   3,28 ft / 1,00 m
     Main Belt covers 74 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0,79" / 20 mm         -               -
   2nd:   0,39" / 10 mm         -               -
   3rd:   0,39" / 10 mm         -               -

   - Protected deck - single deck:
   For and Aft decks: 0,24" / 6 mm

   - Conning towers: Forward 0,79" / 20 mm, Aft 0,00" / 0 mm

Machinery:
   Coal and oil fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 190 ihp / 141 Kw = 10,46 kts
   Range 1 500nm at 8,00 kts
   Bunker at max displacement = 21 tons (80% coal)

Complement:
   29 - 39

Cost:
   £0,017 million / $0,067 million

Distribution of weights at normal displacement:
   Armament: 20 tons, 8,6 %
      - Guns: 20 tons, 8,6 %
   Armour: 37 tons, 15,7 %
      - Belts: 17 tons, 7,2 %
      - Armament: 10 tons, 4,3 %
      - Armour Deck: 9 tons, 3,9 %
      - Conning Tower: 1 tons, 0,3 %
   Machinery: 30 tons, 12,7 %
   Hull, fittings & equipment: 98 tons, 41,6 %
   Fuel, ammunition & stores: 35 tons, 15,0 %
   Miscellaneous weights: 15 tons, 6,4 %
      - On freeboard deck: 5 tons
      - Above deck: 10 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     604 lbs / 274 Kg = 11,5 x 4,7 " / 120 mm shells or 0,6 torpedoes
   Stability (Unstable if below 1.00): 1,49
   Metacentric height 1,3 ft / 0,4 m
   Roll period: 9,6 seconds
   Steadiness   - As gun platform (Average = 50 %): 74 %
         - Recoil effect (Restricted arc if above 1.00): 0,15
   Seaboat quality  (Average = 1.00): 1,31

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0,460 / 0,465
   Length to Beam Ratio: 6,00 : 1
   'Natural speed' for length: 12,55 kts
   Power going to wave formation at top speed: 33 %
   Trim (Max stability = 0, Max steadiness = 100): 56
   Bow angle (Positive = bow angles forward): 0,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20,00 %,  7,22 ft / 2,20 m,  6,56 ft / 2,00 m
      - Forward deck:   32,00 %,  6,56 ft / 2,00 m,  5,91 ft / 1,80 m
      - Aft deck:   30,00 %,  5,91 ft / 1,80 m,  5,91 ft / 1,80 m
      - Quarter deck:   18,00 %,  5,91 ft / 1,80 m,  5,91 ft / 1,80 m
      - Average freeboard:      6,19 ft / 1,89 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 70,4 %
      - Above water (accommodation/working, high = better): 105,7 %
   Waterplane Area: 2 659 Square feet or 247 Square metres
   Displacement factor (Displacement / loading): 143 %
   Structure weight / hull surface area: 33 lbs/sq ft or 159 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,94
      - Longitudinal: 1,75
      - Overall: 1,00
   Excellent machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

This ship is also equipped with sails
10 t for Marconi
5t reserved for sails or different materials

That's a lot of firepower in a small package. I'm wondering if perhaps a pair of smaller 100-105 mm howitzers might not be better? Since you might not have clear lines of sight in a river.

200t is too big for a River Gun Boat...

I just assumed RGB200 stood for river gun boat. Whats its intended purpose?

Quote from: Jefgte on September 26, 2019, 03:38:03 PM
200t is too big for a River Gun Boat...

The Parthian gunboats are even larger, but if you compare them to the Austrian-Hungarian Kormarom class, they are only 3m longer, the difference being in beam. If you start looking at things like the USS City-class ironclads, they are over 500 tons...not much longer but far beamier. Likewise the Austrian river monitor Inn was 536t normal, with a twin 120mm, 3 x 120mm HOW and she was 57.9m x 10.3m x 1.3m

Tonnage isn't as much a restriction as length and draft. A 0.7BC 4:1 L:B vessel is far greater in displacement than a .5 7:1,

As for armament, the only concern would be beam.  This is getting into the field of "I know they didn't do these things, but I don't know why".
The Parthians mount a 120mm forward, and an 118mm HOW amidships. So similar variety.
But...
I doubt that searching will find historical examples of vessels- regardless of displacement - with a 6m beam and 120m guns. I think you'll find 75mm is about the largest you find for that beam.  The question is if that was because of a physical restriction- like the ability of the hull girder to take firing shock without undue stress, or was it because they did not see a need for a larger gun?

Quote...The question is if that was because of a physical restriction- like the ability of the hull girder to take firing shock without undue stress, or was it because they did not see a need for a larger gun?...

Physical restrictions are the size of the river,
height of water during the dry season and the tight turns.

;D ;D ;D  no problemo for the Nil  ;D ;D ;D

you are certainly correct that the size of the river matters. The Austrian Hungarian boats were on the Danube, the US on the Mississippi.  The Parthian on the lower reaches of the Tigris/Euphrates :)

Like I wrote at the beginning, Byzantine Empire use United kingdom artillery.
So, for the fun, I test BB with HMS Glorious guns => T1 x 457.

Justinianus class, Byzantine Empire BB7 laid down 1915

Displacement:
   29 480 t light; 31 043 t standard; 33 694 t normal; 35 814 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (643,36 ft / 643,36 ft) x 104,00 ft x (28,16 / 29,64 ft)
   (196,10 m / 196,10 m) x 31,70 m  x (8,58 / 9,03 m)

Armament:
      2 - 18,00" / 457 mm 40,0 cal guns - 3 319,72lbs / 1 505,80kg shells, 75 per gun
     Breech loading guns in turret on barbette mounts, 1915 Model
     2 x Single mounts on centreline, evenly spread
      6 - 13,50" / 343 mm 45,0 cal guns - 1 240,68lbs / 562,76kg shells, 100 per gun
     Breech loading guns in turret on barbette mounts, 1915 Model
     2 x Triple mounts on centreline, evenly spread
      2 raised mounts
      8 - 7,50" / 191 mm 45,0 cal guns - 212,74lbs / 96,50kg shells, 150 per gun
     Breech loading guns in turret on barbette mounts, 1915 Model
     4 x Twin mounts on sides, evenly spread
      16 - 4,00" / 102 mm 45,0 cal guns - 32,27lbs / 14,64kg shells, 200 per gun
     Breech loading guns in casemate mounts, 1915 Model
     16 x Single mounts on sides, evenly spread
      16 raised mounts
      4 - 0,30" / 7,7 mm 90,0 cal guns - 0,02lbs / 0,01kg shells, 2 000 per gun
     Quick firing guns in deck mounts, 1915 Model
     4 x Single mounts on side ends, evenly spread
      4 raised mounts
      Weight of broadside 16 302 lbs / 7 394 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13,4" / 340 mm   418,00 ft / 127,41 m   10,84 ft / 3,30 m
   Ends:   4,72" / 120 mm   224,00 ft / 68,28 m   10,00 ft / 3,05 m
     1,36 ft / 0,41 m Unarmoured ends
   Upper:   5,50" / 140 mm   418,00 ft / 127,41 m   13,40 ft / 4,08 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1,57" / 40 mm   418,00 ft / 127,41 m   26,95 ft / 8,21 m
   Beam between torpedo bulkheads 86,00 ft / 26,21 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13,4" / 340 mm   5,91" / 150 mm      11,8" / 300 mm
   2nd:   13,4" / 340 mm   5,91" / 150 mm      11,8" / 300 mm
   3rd:   5,92" / 150 mm   3,95" / 100 mm      4,72" / 120 mm
   4th:   1,57" / 40 mm         -               -
   5th:   0,50" / 13 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 3,92" / 100 mm
   Forecastle: 1,57" / 40 mm  Quarter deck: 1,57" / 40 mm

   - Conning towers: Forward 13,39" / 340 mm, Aft 5,92" / 150 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 38 639 shp / 28 825 Kw = 21,18 kts
   Range 9 000nm at 12,00 kts
   Bunker at max displacement = 4 771 tons (90% coal)

Complement:
   1 243 - 1 616

Cost:
   £3,778 million / $15,110 million

Distribution of weights at normal displacement:
   Armament: 2 676 tons, 7,9 %
      - Guns: 2 676 tons, 7,9 %
   Armour: 11 401 tons, 33,8 %
      - Belts: 4 412 tons, 13,1 %
      - Torpedo bulkhead: 654 tons, 1,9 %
      - Armament: 2 655 tons, 7,9 %
      - Armour Deck: 3 245 tons, 9,6 %
      - Conning Towers: 434 tons, 1,3 %
   Machinery: 1 594 tons, 4,7 %
   Hull, fittings & equipment: 12 960 tons, 38,5 %
   Fuel, ammunition & stores: 4 214 tons, 12,5 %
   Miscellaneous weights: 849 tons, 2,5 %
      - Hull below water: 174 tons
      - Hull above water: 100 tons
      - On freeboard deck: 250 tons
      - Above deck: 325 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     62 824 lbs / 28 497 Kg = 21,5 x 18,0 " / 457 mm shells or 11,6 torpedoes
   Stability (Unstable if below 1.00): 1,18
   Metacentric height 7,2 ft / 2,2 m
   Roll period: 16,3 seconds
   Steadiness   - As gun platform (Average = 50 %): 67 %
         - Recoil effect (Restricted arc if above 1.00): 0,65
   Seaboat quality  (Average = 1.00): 1,35

Hull form characteristics:
   Hull has rise forward of midbreak,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0,626 / 0,632
   Length to Beam Ratio: 6,19 : 1
   'Natural speed' for length: 25,36 kts
   Power going to wave formation at top speed: 42 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 0,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   18,00 %,  25,90 ft / 7,89 m,  21,70 ft / 6,61 m
      - Forward deck:   52,00 %,  21,70 ft / 6,61 m,  20,70 ft / 6,31 m
      - Aft deck:   13,00 %,  12,70 ft / 3,87 m,  12,70 ft / 3,87 m
      - Quarter deck:   17,00 %,  12,70 ft / 3,87 m,  12,70 ft / 3,87 m
      - Average freeboard:      19,04 ft / 5,80 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 64,3 %
      - Above water (accommodation/working, high = better): 149,8 %
   Waterplane Area: 50 135 Square feet or 4 658 Square metres
   Displacement factor (Displacement / loading): 119 %
   Structure weight / hull surface area: 213 lbs/sq ft or 1 042 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,96
      - Longitudinal: 1,50
      - Overall: 1,00
   Excellent machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Good seaboat, rides out heavy weather easily

Justinianus - Augustus

Misc weight:
25t for Marconi
300t for top fire control
100t for Admiral staff
150t for climat control
100t reserved
150t for additionnal pumps installation
24t for 4 sub TT x 21" with 4 reloads

Quote from: Jefgte on February 03, 2020, 04:21:16 PM
Like I wrote at the beginning, Byzantine Empire use United kingdom artillery.
So, for the fun, I test BB with HMS Glorious guns => T1 x 457.

Certainly interesting.

While the T1x457 are too slow to do fire control from shell splashes,
I do not see why you could not use the 343mm to create the splash ladders.
However, single-sleeve barrels would be needed to allow each barrel to shoot a slightly different range.

For shorter ranges, you could use the 191mm.

As the "opponent" I would be forced into deciding to armor vs. the more likely 343mm, or increasing all my armor to address the few 457 that may hit.
Though with a low MV /40 cal, the difference may not be huge. 

Not going to worry about construction details, as this is a 'fun' thing :)

457 had 1rpm. 343 had 1.5 to 2 rpm.
For fire, the 343 serve as guides to the 457.

http://www.navweaps.com/Weapons/WNBR_18-40_mk1.php

;)

... with 3T1x457   :)

Justinianus class, Byzantine Empire BB7-2 laid down 1915

Displacement:
   30 500 t light; 32 156 t standard; 34 852 t normal; 37 009 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (643,36 ft / 643,36 ft) x 104,00 ft x (29,12 / 30,63 ft)
   (196,10 m / 196,10 m) x 31,70 m  x (8,88 / 9,34 m)

Armament:
      3 - 18,00" / 457 mm 40,0 cal guns - 3 319,72lbs / 1 505,80kg shells, 75 per gun
     Breech loading guns in turret on barbette mounts, 1915 Model
     3 x Single mounts on centreline ends, majority forward
      6 - 13,50" / 343 mm 45,0 cal guns - 1 240,68lbs / 562,76kg shells, 100 per gun
     Breech loading guns in turret on barbette mounts, 1915 Model
     2 x Triple mounts on centreline, evenly spread
      2 raised mounts
      8 - 6,00" / 152 mm 45,0 cal guns - 108,92lbs / 49,41kg shells, 150 per gun
     Breech loading guns in turret on barbette mounts, 1915 Model
     4 x Twin mounts on sides, evenly spread
      16 - 4,00" / 102 mm 45,0 cal guns - 32,28lbs / 14,64kg shells, 200 per gun
     Breech loading guns in casemate mounts, 1915 Model
     16 x Single mounts on sides, evenly spread
      16 raised mounts
      4 - 0,30" / 7,7 mm 90,0 cal guns - 0,02lbs / 0,01kg shells, 2 000 per gun
     Quick firing guns in deck mounts, 1915 Model
     4 x Single mounts on side ends, evenly spread
      4 raised mounts
      Weight of broadside 18 791 lbs / 8 523 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13,4" / 340 mm   418,00 ft / 127,41 m   10,84 ft / 3,30 m
   Ends:   4,72" / 120 mm   224,00 ft / 68,28 m   10,00 ft / 3,05 m
     1,36 ft / 0,41 m Unarmoured ends
   Upper:   5,50" / 140 mm   418,00 ft / 127,41 m   13,40 ft / 4,08 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1,57" / 40 mm   418,00 ft / 127,41 m   26,95 ft / 8,21 m
   Beam between torpedo bulkheads 86,00 ft / 26,21 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13,4" / 340 mm   5,91" / 150 mm      11,8" / 300 mm
   2nd:   13,4" / 340 mm   5,91" / 150 mm      11,8" / 300 mm
   3rd:   5,92" / 150 mm   3,95" / 100 mm      4,72" / 120 mm
   4th:   1,57" / 40 mm         -               -
   5th:   0,50" / 13 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 3,92" / 100 mm
   Forecastle: 1,57" / 40 mm  Quarter deck: 1,57" / 40 mm

   - Conning towers: Forward 13,39" / 340 mm, Aft 5,92" / 150 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 39 000 shp / 29 094 Kw = 21,14 kts
   Range 9 000nm at 12,00 kts
   Bunker at max displacement = 4 853 tons (90% coal)

Complement:
   1 275 - 1 658

Cost:
   £4,057 million / $16,226 million

Distribution of weights at normal displacement:
   Armament: 2 958 tons, 8,5 %
      - Guns: 2 958 tons, 8,5 %
   Armour: 11 829 tons, 33,9 %
      - Belts: 4 412 tons, 12,7 %
      - Torpedo bulkhead: 654 tons, 1,9 %
      - Armament: 3 074 tons, 8,8 %
      - Armour Deck: 3 245 tons, 9,3 %
      - Conning Towers: 444 tons, 1,3 %
   Machinery: 1 609 tons, 4,6 %
   Hull, fittings & equipment: 13 256 tons, 38,0 %
   Fuel, ammunition & stores: 4 352 tons, 12,5 %
   Miscellaneous weights: 849 tons, 2,4 %
      - Hull below water: 174 tons
      - Hull above water: 100 tons
      - On freeboard deck: 250 tons
      - Above deck: 325 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     60 479 lbs / 27 433 Kg = 20,7 x 18,0 " / 457 mm shells or 10,8 torpedoes
   Stability (Unstable if below 1.00): 1,15
   Metacentric height 6,9 ft / 2,1 m
   Roll period: 16,6 seconds
   Steadiness   - As gun platform (Average = 50 %): 67 %
         - Recoil effect (Restricted arc if above 1.00): 0,74
   Seaboat quality  (Average = 1.00): 1,35

Hull form characteristics:
   Hull has rise forward of midbreak,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0,626 / 0,632
   Length to Beam Ratio: 6,19 : 1
   'Natural speed' for length: 25,36 kts
   Power going to wave formation at top speed: 42 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 0,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   18,00 %,  25,90 ft / 7,89 m,  21,70 ft / 6,61 m
      - Forward deck:   52,00 %,  21,70 ft / 6,61 m,  20,70 ft / 6,31 m
      - Aft deck:   13,00 %,  12,70 ft / 3,87 m,  12,70 ft / 3,87 m
      - Quarter deck:   17,00 %,  12,70 ft / 3,87 m,  12,70 ft / 3,87 m
      - Average freeboard:      19,04 ft / 5,80 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 67,0 %
      - Above water (accommodation/working, high = better): 146,1 %
   Waterplane Area: 50 135 Square feet or 4 658 Square metres
   Displacement factor (Displacement / loading): 116 %
   Structure weight / hull surface area: 218 lbs/sq ft or 1 064 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,95
      - Longitudinal: 1,52
      - Overall: 1,00
   Excellent machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Good seaboat, rides out heavy weather easily

Justinianus - Augustus

Misc weight:
25t for Marconi
300t for top fire control
100t for Admiral staff
150t for climat control
100t reserved
150t for additionnal pumps installation
24t for 4 sub TT x 21" with 4 reloads

...With 4T1x457   :)

Justinianus class, Byzantine Empire BB7-3 laid down 1915

Displacement:
   28 100 t light; 29 569 t standard; 32 160 t normal; 34 232 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (643,36 ft / 643,36 ft) x 104,00 ft x (26,87 / 28,32 ft)
   (196,10 m / 196,10 m) x 31,70 m  x (8,19 / 8,63 m)

Armament:
      4 - 18,00" / 457 mm 40,0 cal guns - 3 319,72lbs / 1 505,80kg shells, 75 per gun
     Breech loading guns in turret on barbette mounts, 1915 Model
     4 x Single mounts on centreline ends, evenly spread
      6 - 10,00" / 254 mm 45,0 cal guns - 504,26lbs / 228,73kg shells, 120 per gun
     Breech loading guns in turret on barbette mounts, 1915 Model
     3 x Twin mounts on centreline, evenly spread
      2 raised mounts
      12 - 4,72" / 120 mm 45,0 cal guns - 53,03lbs / 24,05kg shells, 200 per gun
     Breech loading guns in casemate mounts, 1915 Model
     12 x Single mounts on sides, evenly spread
      4 - 0,30" / 7,7 mm 90,0 cal guns - 0,02lbs / 0,01kg shells, 2 000 per gun
     Quick firing guns in deck mounts, 1915 Model
     4 x Single mounts on side ends, evenly spread
      4 raised mounts
      Weight of broadside 16 941 lbs / 7 684 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13,4" / 340 mm   418,00 ft / 127,41 m   10,84 ft / 3,30 m
   Ends:   4,72" / 120 mm   224,00 ft / 68,28 m   10,00 ft / 3,05 m
     1,36 ft / 0,41 m Unarmoured ends
   Upper:   5,50" / 140 mm   418,00 ft / 127,41 m   13,40 ft / 4,08 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Additional damage containing bulkheads:
      1,57" / 40 mm   418,00 ft / 127,41 m   26,95 ft / 8,21 m
   Beam between torpedo bulkheads 86,00 ft / 26,21 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13,4" / 340 mm   5,91" / 150 mm      11,8" / 300 mm
   2nd:   13,4" / 340 mm   5,91" / 150 mm      11,8" / 300 mm
   4th:   1,57" / 40 mm         -               -
   5th:   0,50" / 13 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 3,92" / 100 mm
   Forecastle: 1,57" / 40 mm  Quarter deck: 1,57" / 40 mm

   - Conning towers: Forward 13,39" / 340 mm, Aft 5,92" / 150 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 38 000 shp / 28 348 Kw = 21,23 kts
   Range 9 000nm at 12,00 kts
   Bunker at max displacement = 4 663 tons (90% coal)

Complement:
   1 199 - 1 560

Cost:
   £3,552 million / $14,209 million

Distribution of weights at normal displacement:
   Armament: 2 635 tons, 8,2 %
      - Guns: 2 635 tons, 8,2 %
   Armour: 11 583 tons, 36,0 %
      - Belts: 4 412 tons, 13,7 %
      - Torpedo bulkhead: 654 tons, 2,0 %
      - Armament: 2 851 tons, 8,9 %
      - Armour Deck: 3 245 tons, 10,1 %
      - Conning Towers: 421 tons, 1,3 %
   Machinery: 1 568 tons, 4,9 %
   Hull, fittings & equipment: 11 466 tons, 35,7 %
   Fuel, ammunition & stores: 4 059 tons, 12,6 %
   Miscellaneous weights: 849 tons, 2,6 %
      - Hull below water: 174 tons
      - Hull above water: 100 tons
      - On freeboard deck: 250 tons
      - Above deck: 325 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     63 508 lbs / 28 807 Kg = 21,8 x 18,0 " / 457 mm shells or 11,9 torpedoes
   Stability (Unstable if below 1.00): 1,24
   Metacentric height 7,9 ft / 2,4 m
   Roll period: 15,6 seconds
   Steadiness   - As gun platform (Average = 50 %): 68 %
         - Recoil effect (Restricted arc if above 1.00): 0,57
   Seaboat quality  (Average = 1.00): 1,36

Hull form characteristics:
   Hull has rise forward of midbreak,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0,626 / 0,632
   Length to Beam Ratio: 6,19 : 1
   'Natural speed' for length: 25,36 kts
   Power going to wave formation at top speed: 42 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 0,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   18,00 %,  25,90 ft / 7,89 m,  21,70 ft / 6,61 m
      - Forward deck:   52,00 %,  21,70 ft / 6,61 m,  20,70 ft / 6,31 m
      - Aft deck:   13,00 %,  12,70 ft / 3,87 m,  12,70 ft / 3,87 m
      - Quarter deck:   17,00 %,  12,70 ft / 3,87 m,  12,70 ft / 3,87 m
      - Average freeboard:      19,04 ft / 5,80 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 63,6 %
      - Above water (accommodation/working, high = better): 155,3 %
   Waterplane Area: 50 135 Square feet or 4 658 Square metres
   Displacement factor (Displacement / loading): 118 %
   Structure weight / hull surface area: 194 lbs/sq ft or 946 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,96
      - Longitudinal: 1,38
      - Overall: 1,00
   Excellent machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Good seaboat, rides out heavy weather easily

Justinianus - Augustus

Misc weight:
25t for Marconi
300t for top fire control
100t for Admiral staff
150t for climat control
100t reserved
150t for additionnal pumps installation
24t for 4 sub TT x 21" with 4 reloads