Byzantine Empire - 1910

[Jefgte]

Has I know, Kirk, I have payed in the report to instal recent guns on the battleships when they have main 10yo refit (refurbishement).

Did I made some mistakes?

;)

[Kaiser Kirk]

Has I know, Kirk, I have payed in the report to instal recent guns on the battleships when they have main 10yo refit (refurbishement).

Did I made some mistakes?

;)

Oh sorry, I did not realize that.
Really a clever use of tonnage, I should have done that, instead of some of my 1909 construction.

The postings under battleships do not have a note indicating those are refitted versions. I did not notice the gun dates did not match the lay down date.

The only potential issue would then be the wording here :
:main battery turret/barbettes can be replaced by turret/barbettes of equal or smaller roller diameter or other components allowed during refurbishments."

Somewhere it's been explained (and others can correct me if I'm misremembering) that the "equal or smaller " is to be established by the weight of the guns/mounts.

With the beginning technology, the largest gun would be a Twin 356mm/35.  Let's say that was your ship's original gun.
So a twin 356mm/35 has a gun weight of 111 tons. 
While a 343mm/40 has a gun weight of 116 tons.

However, I'm guessing you started with a 343mm/30, which has a weight of only 100 tons.
Can't do it.

Now, the Reconstruction (instead of refurbishment) rule might allow it, but it doesn't say so.

I would check with Snip, but I don't think you're allowed to put a 116ton in the 111, or 100 ton spot.

[Jefgte]

...However, I'm guessing you started with a 343mm/30, which has a weight of only 100 tons.
Can't do it.
...

I calculate & paye with SS
for BB2
343-35cal => 199t
343-40cal => 233t

...The postings under battleships do not have a note indicating those are refitted versions. I did not notice the gun dates did not match the lay down date.
..

Basicaly, Byzantime ship had a refit, refurbishement or rebuilt after 10yo
Global life of a ship:
LD 1909
com 1912
refit, refurbishement or rebuilt 1922
secondary ship 1932
reserve 1937
scrap 1942

[Kaiser Kirk]

...However, I'm guessing you started with a 343mm/30, which has a weight of only 100 tons.
Can't do it.
...

I calculate & paye with SS
for BB2
343-35cal => 199t
343-40cal => 233t

What I'm pointing out is that under the refurbishment rule, as I understand it, you can't increase the weight of the turret.  Since the 343/40 is 34tons heavier than the 343/35, you can't do it.

I strongly recommend you check with Snip to make sure that I understand the rule correctly.

[Jefgte]

...Since the 343/40 is 34tons heavier than the 343/35, you can't do it. ...

For BB2 class:

SS give for 2T2x343/35-1896
Guns 199t
Mounts 417t
Armour 763t

SS give for 2T2x343/40-1908
Guns 233t
Mounts 487t
Armour 763t

You'r right, install modern guns increase mounts weight.
34t for the guns + 70t for the mounts
Total= 104t for the new guns => 0,1BP

[snip]

So Im not recalling off the top of my head any times that battleships were regunned in this way. The only close thing that jumps to mind is the reconstructions of the Italian Dreadnaughts in the 30's, but those were boreouts. Are there any historical examples of the action you are trying to undertake Jef?

[Jefgte]

As I can remember immediatly & similar...
Admiral Nakhimov 1885, rebuilt from barbettes to turrets.
Coastal battleship Requin 1885, rebuilt 1898-1901 from barbettes with 420mm guns to turrets with 270mm guns.
Aoba class cruiser rebuilt too...

[snip]

Was the Nakhimov reguned at that time or did the rebuild use the same weapons?

Going from the really big 420mm to a smaller 270mm is a lot different than working up caliber with the same bore.

Aboa is a little advanced for a in-period comparison.

[snip]

So, here is where Im at with this right now. I'm not opposed to this in concept, but I am to the implimentation here. Thought process below.

--The intent here is to regun old ships. Im presuming this is to allow for an extended life out of pre-start ships. Nothing is wrong with this approach from a theory standpoint, as provisions within the refit rules allow for this.
--In-universe terms, the ships in question are receving at the very least new guns, recoil, and mounting equipment. I would argue that this sort of action should require flat out new turrets as this is installing new guns which by virture of being longer require more space to recoil in.
--Our rules say 'main battery turret/barbettes can be replaced by turret/barbettes of equal or smaller roller diameter" on the subject of making modifications to turreted armament. The only other mention is in regards to turret hight. No mention is made of being able to increase barbette diameter, so that is to be considered imposible.
--With the above two things in mind, I dont think what Jef has in mind should be strictly imposible, but I do think it should require a specificly developed turret seperate from any existing turret for the gun in question. This would be a turret unique to each class the refit was carried out on. (Whether or not this would work well is another question that we dont need to get into here) Whether we want to enforce a same-weight requirement for the new turret is an open question.
--The issue comes from that we dont pay for any armaments research pre-start, so these turrets can be pulled out of thin air. We did that with other armaments, but since this is something really specific I dont know how I feel about that staying true.
--Since this is sort of new territory, I'm hesitant to say yes to just declaring the turrets because I dont know if others would have done this if the feasabilty was known.

Thoughts?

[Kaiser Kirk]

Thoughts :
In tanks, turret ring size is apparently a limiter on the power of the gun that can be mounted.
I expect the same applies to ship barbettes.

Historically :
The Aoba class was modified to 3T2 while building, and the two Furataka class which preceeded it were not rebuilt to match. Further, Aoba was 900 tons (12.7%) over planned displacement.
The Lexingtons had barbettes deleted while building

The North Carolinas were "upgunned" after keel laying from 4T3 14" to 3T3 16", which was 7% greater weight... but that possibility was also a design requirement.

Furious and the Courageous CVLs all seem to have had their barbettes removed.

The Italian dreadnaughts were bored out, elevation was increased, but they were the same guns,  so weight of guns and turrets remained the same. Technically, a 305/50 is 15,250mm long, and if bored out to 320, that 15,250mm is now only 47 calibers long.

The IJN Mogami was converted from 5T3 155mm to 5T2 203mm, which SS indicates is an *increase* in weight, however wiki confirms my memory : "the designers had designed the class in mind so that the 6-inch guns could be switched with 8-inch batteries".


Conclusion :
My inference : Once the ship is ready for launch, one is past the point where changing barbettes is reasonable.

I think using the "equal or smaller roller diameter " as a limiter is reasonable. The Turret/Barbette can be removed, or raised as part of reconstruction, but the total weight of guns and or turret cannot be increased as refurbishment or reconstruction.   

So a 343/35 can be replaced with a 323/40....

We *could* decide that there is a tiny fudge factor - like +/-1%, or the nearest 10lbs, or something.

Next question : Is a new turret needed as part of that  ?

If one developed the gun with the idea of fitting to existing turrets.... maybe not ?

However, you are then stuck with the old hoists, flash tights, handling equipment.  The Royal Sovereigns with their 13.5" guns fired very very slowly. If you stick a 323/40 in there instead, you really want the new turret & hoists and elevations, and etc.  Otherwise all you have is a smaller gun that fires really slow.

We know from the US 2240 vs 2700lb 16" shells that older hoists may not be able to fit bigger, longer, newer shells.
So if shell weight goes up (perhaps you regun from a 343/45 with 840mv to a 343/45 with a 820mv, but 1920 "greenboy" 20% larger shells.,,, you may need another turret ?? - They didn't historically.  It was going from the 20% over to the 40% over of the 2700s that hit that point. 
Again though, one may want the new turret for the "better mount" attributes.
If you check the Parthian artillery, or my turn 1, you'll see I've been developing 2 mounts at once, so the Navy can pick the better of the two. That's my way of avoiding something like Invincible's mess with the malfunctioning electrical turrets they had to convert to hydraulic :)

Sidenote : We will probably need a rule eventually on what is entailed in increasing elevation.

[Jefgte]

Well...

So a 343/35 can be replaced with a 323/40....

We *could* decide that there is a tiny fudge factor - like +/-1%, or the nearest 10lbs, or something.

Next question : Is a new turret needed as part of that  ?

If one developed the gun with the idea of fitting to existing turrets.... maybe not ?

However, you are then stuck with the old hoists, flash tights, handling equipment.  The Royal Sovereigns with their 13.5" guns fired very very slowly. If you stick a 323/40 in there instead, you really want the new turret & hoists and elevations, and etc.   

Studying this option...

[Jefgte]

I have started to rework my BBs

https://www.navalism.org/index.php/topic,7093.0.html

[Jefgte]

Here is new BB3 - always 19420t-21kts
Old 3T3x13''5/35cal are now 4T2x12''/45 cal

Kilkis - Lemnos, Byzantine Empire BB3 laid down 1900

Displacement:
   19 420 t light; 20 411 t standard; 21 435 t normal; 22 253 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (557,00 ft / 557,00 ft) x 83,00 ft x (25,52 / 26,33 ft)
   (169,77 m / 169,77 m) x 25,30 m  x (7,78 / 8,03 m)

Armament:
      8 - 12,00" / 305 mm 45,0 cal guns - 871,37lbs / 395,24kg shells, 100 per gun
     Breech loading guns in turret on barbette mounts, 1900 Model
     4 x Twin mounts on centreline, evenly spread
      8 - 7,50" / 191 mm 45,0 cal guns - 212,75lbs / 96,50kg shells, 140 per gun
     Breech loading guns in casemate mounts, 1900 Model
     8 x Single mounts on sides, evenly spread
      12 - 4,00" / 102 mm 45,0 cal guns - 32,28lbs / 14,64kg shells, 200 per gun
     Quick firing guns in casemate mounts, 1900 Model
     12 x Single mounts on sides, evenly spread
      12 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, 1900 Model
     4 x Single mounts on side ends, evenly spread
      4 raised mounts
      Weight of broadside 9 060 lbs / 4 110 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   11,8" / 300 mm   368,00 ft / 112,17 m   11,00 ft / 3,35 m
   Ends:   4,72" / 120 mm   189,00 ft / 57,61 m   10,00 ft / 3,05 m
   Upper:   5,50" / 140 mm   368,00 ft / 112,17 m   8,00 ft / 2,44 m
     Main Belt covers 102 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13,4" / 340 mm   5,92" / 150 mm      12,6" / 320 mm
   2nd:   5,92" / 150 mm   3,95" / 100 mm      4,72" / 120 mm
   3rd:   1,00" / 25 mm         -         1,00" / 25 mm
   5th:   0,50" / 13 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 2,55" / 65 mm
   Forecastle: 1,58" / 40 mm  Quarter deck: 1,58" / 40 mm

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

Machinery:
   Coal and oil fired boilers, complex reciprocating steam engines,
   Direct drive, 4 shafts, 29 300 ihp / 21 858 Kw = 21,03 kts
   Range 4 500nm at 10,00 kts
   Bunker at max displacement = 1 842 tons (90% coal)

Complement:
   885 - 1 151

Cost:
   £2,064 million / $8,255 million

Distribution of weights at normal displacement:
   Armament: 1 557 tons, 7,3 %
      - Guns: 1 557 tons, 7,3 %
   Armour: 6 555 tons, 30,6 %
      - Belts: 3 108 tons, 14,5 %
      - Armament: 1 635 tons, 7,6 %
      - Armour Deck: 1 517 tons, 7,1 %
      - Conning Towers: 294 tons, 1,4 %
   Machinery: 4 533 tons, 21,1 %
   Hull, fittings & equipment: 6 270 tons, 29,3 %
   Fuel, ammunition & stores: 2 015 tons, 9,4 %
   Miscellaneous weights: 505 tons, 2,4 %
      - Hull below water: 20 tons
      - Hull above water: 150 tons
      - On freeboard deck: 150 tons
      - Above deck: 185 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     20 654 lbs / 9 368 Kg = 23,9 x 12,0 " / 305 mm shells or 2,1 torpedoes
   Stability (Unstable if below 1.00): 1,28
   Metacentric height 5,9 ft / 1,8 m
   Roll period: 14,3 seconds
   Steadiness   - As gun platform (Average = 50 %): 72 %
         - Recoil effect (Restricted arc if above 1.00): 0,49
   Seaboat quality  (Average = 1.00): 1,43

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0,636 / 0,640
   Length to Beam Ratio: 6,71 : 1
   'Natural speed' for length: 23,60 kts
   Power going to wave formation at top speed: 45 %
   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 %,  21,20 ft / 6,46 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:      16,72 ft / 5,10 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 101,6 %
      - Above water (accommodation/working, high = better): 122,3 %
   Waterplane Area: 34 963 Square feet or 3 248 Square metres
   Displacement factor (Displacement / loading): 92 %
   Structure weight / hull surface area: 145 lbs/sq ft or 708 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,98
      - Longitudinal: 1,25
      - Overall: 1,00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

Misc Weight 505t:
160t fire control
100t for extra pump installation
100t for climatization
25t for long range wireless
20t for 4TTx450+5 reloads
100t reserved

[Jefgte]

...& new BB2 with 13''5/35cal

Barbarossa, Byzantine Empire BB2 laid down 1896

Displacement:
   15 650 t light; 16 691 t standard; 17 666 t normal; 18 447 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (491,00 ft / 480,00 ft) x 79,00 ft x (26,05 / 27,01 ft)
   (149,66 m / 146,30 m) x 24,08 m  x (7,94 / 8,23 m)

Armament:
      4 - 13,50" / 343 mm 35,0 cal guns - 1 153,49lbs / 523,21kg shells, 100 per gun
     Breech loading guns in turret on barbette mounts, 1896 Model
     2 x Twin mounts on centreline ends, evenly spread
      8 - 9,20" / 234 mm 45,0 cal guns - 392,66lbs / 178,11kg shells, 150 per gun
     Breech loading guns in turret on barbette mounts, 1896 Model
     4 x Twin mounts on side ends, evenly spread
      10 - 6,00" / 152 mm 45,0 cal guns - 108,92lbs / 49,41kg shells, 220 per gun
     Quick firing guns in casemate mounts, 1896 Model
     10 x Single mounts on sides, evenly spread
      16 - 3,00" / 76,2 mm 45,0 cal guns - 13,62lbs / 6,18kg shells, 300 per gun
     Quick firing guns in deck mounts, 1896 Model
     16 x Single mounts on side ends, evenly spread
      16 raised mounts
      4 - 0,30" / 7,7 mm 50,0 cal guns - 0,01lbs / 0,00kg shells, 2 000 per gun
     Quick firing guns in deck mounts, 1896 Model
     4 x Single mounts on side ends, evenly spread
      4 raised mounts
      Weight of broadside 9 062 lbs / 4 111 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   11,8" / 300 mm   312,00 ft / 95,10 m   11,00 ft / 3,35 m
   Ends:   4,72" / 120 mm   168,00 ft / 51,21 m   7,00 ft / 2,13 m
   Upper:   5,92" / 150 mm   312,00 ft / 95,10 m   8,00 ft / 2,44 m
     Main Belt covers 100 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13,4" / 340 mm   5,92" / 150 mm      12,6" / 320 mm
   2nd:   5,92" / 150 mm   2,55" / 65 mm      4,72" / 120 mm
   3rd:   4,72" / 120 mm   1,97" / 50 mm            -
   4th:   0,50" / 13 mm         -               -
   5th:   0,50" / 13 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 2,55" / 65 mm
   Forecastle: 1,37" / 35 mm  Quarter deck: 1,37" / 35 mm

   - Conning towers: Forward 11,80" / 300 mm, Aft 5,92" / 150 mm

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 4 shafts, 15 200 ihp / 11 339 Kw = 18,05 kts
   Range 4 500nm at 10,00 kts
   Bunker at max displacement = 1 756 tons (100% coal)

Complement:
   766 - 996

Cost:
   £1,629 million / $6,517 million

Distribution of weights at normal displacement:
   Armament: 1 543 tons, 8,7 %
      - Guns: 1 543 tons, 8,7 %
   Armour: 5 467 tons, 30,9 %
      - Belts: 2 649 tons, 15,0 %
      - Armament: 1 329 tons, 7,5 %
      - Armour Deck: 1 231 tons, 7,0 %
      - Conning Towers: 259 tons, 1,5 %
   Machinery: 2 789 tons, 15,8 %
   Hull, fittings & equipment: 5 332 tons, 30,2 %
   Fuel, ammunition & stores: 2 016 tons, 11,4 %
   Miscellaneous weights: 519 tons, 2,9 %
      - Hull below water: 24 tons
      - Hull above water: 75 tons
      - On freeboard deck: 240 tons
      - Above deck: 180 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     18 343 lbs / 8 320 Kg = 14,9 x 13,5 " / 343 mm shells or 2,3 torpedoes
   Stability (Unstable if below 1.00): 1,23
   Metacentric height 5,1 ft / 1,6 m
   Roll period: 14,7 seconds
   Steadiness   - As gun platform (Average = 50 %): 75 %
         - Recoil effect (Restricted arc if above 1.00): 0,60
   Seaboat quality  (Average = 1.00): 1,45

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0,626 / 0,630
   Length to Beam Ratio: 6,08 : 1
   'Natural speed' for length: 21,91 kts
   Power going to wave formation at top speed: 42 %
   Trim (Max stability = 0, Max steadiness = 100): 52
   Bow angle (Positive = bow angles forward): -10,00 degrees
   Stern overhang: 1,00 ft / 0,30 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   17,50 %,  17,72 ft / 5,40 m,  15,43 ft / 4,70 m
      - Forward deck:   30,00 %,  15,43 ft / 4,70 m,  14,45 ft / 4,40 m
      - Aft deck:   35,00 %,  14,45 ft / 4,40 m,  14,45 ft / 4,40 m
      - Quarter deck:   17,50 %,  14,45 ft / 4,40 m,  14,45 ft / 4,40 m
      - Average freeboard:      14,93 ft / 4,55 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 89,0 %
      - Above water (accommodation/working, high = better): 103,7 %
   Waterplane Area: 28 413 Square feet or 2 640 Square metres
   Displacement factor (Displacement / loading): 97 %
   Structure weight / hull surface area: 155 lbs/sq ft or 754 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,94
      - Longitudinal: 1,66
      - Overall: 1,00
   Adequate 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

24t for 4TT x18'' + 4 reloads
75t for additionnal air ventillation
75t for additionnal pumps installation
155t for fire control
100t for Admiral staff
25t for Marconi
65t reserved

[Jefgte]

New CBB1 with 12''/35 cal & 6'' guns
always 7850t & 18kts

CBB1, Byzantine Empire CBB1 laid down 1890

Displacement:
   7 850 t light; 8 327 t standard; 9 038 t normal; 9 607 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (405,00 ft / 400,00 ft) x 62,50 ft x (20,21 / 21,28 ft)
   (123,44 m / 121,92 m) x 19,05 m  x (6,16 / 6,48 m)

Armament:
      4 - 12,00" / 305 mm 25,0 cal guns - 784,77lbs / 355,97kg shells, 100 per gun
     Breech loading guns in turret on barbette mounts, 1890 Model
     2 x Twin mounts on centreline ends, evenly spread
      10 - 6,00" / 152 mm 45,0 cal guns - 108,92lbs / 49,41kg shells, 180 per gun
     Quick firing guns in casemate mounts, 1890 Model
     10 x Single mounts on sides, evenly spread
      8 - 3,00" / 76,2 mm 50,0 cal guns - 14,29lbs / 6,48kg shells, 200 per gun
     Quick firing guns in deck mounts, 1890 Model
     8 x Single mounts on sides, evenly spread
      4 - 0,30" / 7,7 mm 50,0 cal guns - 0,01lbs / 0,01kg shells, 2 000 per gun
     Machine guns in deck mounts, 1890 Model
     4 x Single mounts on side ends, evenly spread
      Weight of broadside 4 343 lbs / 1 970 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   8,27" / 210 mm   261,00 ft / 79,55 m   6,28 ft / 1,91 m
   Ends:   3,55" / 90 mm   133,00 ft / 40,54 m   6,00 ft / 1,83 m
     6,00 ft / 1,83 m Unarmoured ends
   Upper:   3,55" / 90 mm   261,00 ft / 79,55 m   8,00 ft / 2,44 m
     Main Belt covers 100 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   9,05" / 230 mm   2,77" / 70 mm      7,87" / 200 mm
   3rd:   1,57" / 40 mm         -               -
   4th:   0,39" / 10 mm         -               -
   5th:   0,39" / 10 mm         -               -

   - Protected deck - single deck:
   For and Aft decks: 2,37" / 60 mm
   Forecastle: 1,37" / 35 mm  Quarter deck: 1,37" / 35 mm

   - Conning towers: Forward 7,87" / 200 mm, Aft 2,37" / 60 mm

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 10 700 ihp / 7 982 Kw = 18,10 kts
   Range 4 500nm at 10,00 kts
   Bunker at max displacement = 1 280 tons (100% coal)

Complement:
   463 - 602

Cost:
   £0,786 million / $3,145 million

Distribution of weights at normal displacement:
   Armament: 520 tons, 5,7 %
      - Guns: 520 tons, 5,7 %
   Armour: 2 247 tons, 24,9 %
      - Belts: 1 023 tons, 11,3 %
      - Armament: 355 tons, 3,9 %
      - Armour Deck: 773 tons, 8,6 %
      - Conning Towers: 96 tons, 1,1 %
   Machinery: 2 078 tons, 23,0 %
   Hull, fittings & equipment: 2 825 tons, 31,3 %
   Fuel, ammunition & stores: 1 188 tons, 13,1 %
   Miscellaneous weights: 181 tons, 2,0 %
      - Hull below water: 8 tons
      - Hull above water: 76 tons
      - On freeboard deck: 20 tons
      - Above deck: 77 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     8 796 lbs / 3 990 Kg = 10,2 x 12,0 " / 305 mm shells or 1,4 torpedoes
   Stability (Unstable if below 1.00): 1,40
   Metacentric height 4,4 ft / 1,3 m
   Roll period: 12,5 seconds
   Steadiness   - As gun platform (Average = 50 %): 74 %
         - Recoil effect (Restricted arc if above 1.00): 0,43
   Seaboat quality  (Average = 1.00): 1,32

Hull form characteristics:
   Hull has raised forecastle,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0,626 / 0,632
   Length to Beam Ratio: 6,40 : 1
   'Natural speed' for length: 20,00 kts
   Power going to wave formation at top speed: 46 %
   Trim (Max stability = 0, Max steadiness = 100): 56
   Bow angle (Positive = bow angles forward): -15,00 degrees
   Stern overhang: 1,00 ft / 0,30 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   15,00 %,  11,00 ft / 3,35 m,  15,00 ft / 4,57 m
      - Forward deck:   30,00 %,  11,00 ft / 3,35 m,  11,00 ft / 3,35 m
      - Aft deck:   40,00 %,  11,00 ft / 3,35 m,  11,00 ft / 3,35 m
      - Quarter deck:   15,00 %,  11,00 ft / 3,35 m,  11,00 ft / 3,35 m
      - Average freeboard:      11,36 ft / 3,46 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 99,8 %
      - Above water (accommodation/working, high = better): 84,8 %
   Waterplane Area: 18 732 Square feet or 1 740 Square metres
   Displacement factor (Displacement / loading): 104 %
   Structure weight / hull surface area: 121 lbs/sq ft or 589 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,96
      - Longitudinal: 1,44
      - Overall: 1,00
   Adequate machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

8t for 4 subTT x 15''
38t for additionnal pumps installation
38t for additionnal air equipement
52t for fire control
10t for short Marconi
20t reserved