25 de Mayo rebuild.

[RAM]

As seen in the news report, part of the expansion plan of the NUS navy contemplates the need to bring the existing battleships to a better standards. Given that Independencia and Libertad are PDs they'll soon be demoted to CDS. The other two BBs, Islas Malvinas and 25 de Mayo, will remain in service.

So far the most urgent issue is that while Islas Malvinas has a working FC, 25 de Mayo does not. While Islas Malvinas can steam at 21.5 knots, 25 de Mayo is good for 19.5 only. 

Being the 2nd most powerful ship in the NUS navy, that's unnaceptable. In the memo published in the news section it was reccomended to rebuild 25 de Mayo, and that will be accomplished during 1916.

I'll post here the current 25 de Mayo stats, and in the following post (to make it easier to keep track of the changes involved), I'll post the pic and stats of the planned rebuild.

As always any input will be welcome. And BTW I need an estimation of the cost of the rebuild. I'll include the cost I calculated, if it needs to be corrected please tell me so.


Veinticinco de Mayo, NUS Battleship laid down 1905


Credit for peices used in the making of the artwork goes to 'thesmilingassassin' & 'BrockPaine' @ WPDB.
Displacement:
   12,751 t light; 13,435 t standard; 15,378 t normal; 16,933 t full load

Dimensions: Length overall / water x beam x draught
   434.00 ft / 434.00 ft x 72.00 ft x 26.50 ft (normal load)
   132.28 m / 132.28 m x 21.95 m  x 8.08 m

Armament:
      6 - 12.00" / 305 mm guns (3x2 guns), 800.00lbs / 362.87kg shells, 1900 Model
     Breech loading guns in turrets (on barbettes)
     on centreline, evenly spread
     Aft Main mounts separated by engine room
      8 - 6.00" / 152 mm guns in single mounts, 100.00lbs / 45.36kg shells, 1905 Model
     Breech loading guns in casemate mounts
     on side, evenly spread
     8 guns in hull casemates - Limited use in all but light seas
      8 - 6.00" / 152 mm guns in single mounts, 100.00lbs / 45.36kg shells, 1905 Model
     Quick firing guns in deck mounts with hoists
     on side, evenly spread
      6 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1905 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 6,481 lbs / 2,940 kg
   Shells per gun, main battery: 100
   2 - 18.0" / 457.2 mm submerged torpedo tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12.0" / 305 mm   282.00 ft / 85.95 m   12.00 ft / 3.66 m
   Ends:   4.00" / 102 mm   152.00 ft / 46.33 m   10.00 ft / 3.05 m
   Upper:   8.00" / 203 mm   282.00 ft / 85.95 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:   13.0" / 330 mm   10.0" / 254 mm      13.0" / 330 mm
   2nd:   3.00" / 76 mm         -         8.00" / 203 mm
   3rd:   2.00" / 51 mm         -         6.00" / 152 mm
   4th:   1.00" / 25 mm         -               -

   - Armour deck: 2.00" / 51 mm, Conning tower: 12.00" / 305 mm

Machinery:
   Coal fired boilers, steam turbines,
   Direct drive, 4 shafts, 19,427 shp / 14,493 Kw = 19.50 kts
   Range 9,750nm at 10.00 kts
   Bunker at max displacement = 3,498 tons (100% coal)

Complement:
   689 - 897

Cost:
   £1.407 million / $5.629 million

Distribution of weights at normal displacement:
   Armament: 874 tons, 5.7 %
   Armour: 5,427 tons, 35.3 %
      - Belts: 2,819 tons, 18.3 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 1,563 tons, 10.2 %
      - Armour Deck: 886 tons, 5.8 %
      - Conning Tower: 160 tons, 1.0 %
   Machinery: 1,619 tons, 10.5 %
   Hull, fittings & equipment: 4,731 tons, 30.8 %
   Fuel, ammunition & stores: 2,627 tons, 17.1 %
   Miscellaneous weights: 100 tons, 0.7 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     16,796 lbs / 7,619 Kg = 19.4 x 12.0 " / 305 mm shells or 2.3 torpedoes
   Stability (Unstable if below 1.00): 1.05
   Metacentric height 3.4 ft / 1.0 m
   Roll period: 16.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.71
   Seaboat quality  (Average = 1.00): 1.39

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.650
   Length to Beam Ratio: 6.03 : 1
   'Natural speed' for length: 20.83 kts
   Power going to wave formation at top speed: 50 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): -14.00 degrees
   Stern overhang: -5.00 ft / -1.52 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      22.00 ft / 6.71 m
      - Forecastle (30 %):   22.00 ft / 6.71 m
      - Mid (40 %):      22.00 ft / 6.71 m (14.00 ft / 4.27 m aft of break)
      - Quarterdeck (20 %):   14.00 ft / 4.27 m
      - Stern:      14.00 ft / 4.27 m
      - Average freeboard:   17.20 ft / 5.24 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 79.6 %
      - Above water (accommodation/working, high = better): 103.2 %
   Waterplane Area: 23,938 Square feet or 2,224 Square metres
   Displacement factor (Displacement / loading): 98 %
   Structure weight / hull surface area: 135 lbs/sq ft or 657 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.93
      - Longitudinal: 2.07
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is adequate
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

Misc Weight as follows:
50 tons Flag facilities
25 tons Marconi
15 tons Climate control
10 tons torpedos

[RAM]

As rebuilt.

Main changes:
-Oil fired machinery and 1916 turbines. 22.5 knots top speed.
-Bulges included to improve stability.
-Aft funnel gone.
-Flush deck
-Raised barbettes to cope with the raised freeboard.
-old single 6'' mounts changed for the new twin mount the new CLs will also carry.
-casemated mounts better spaced.
-new mast between Q and Y turrets.
-deleted the 3'' battery.
-included four 1'' machineguns
-FC in place
-boats and crane included (they were missing in the original)
-Increased turret armor, deck armor
-Decreased CT armor.




Veinticinco de Mayo, NUS Battleship laid down 1905 (Engine 1916)

Displacement:
   13.590 t light; 14.342 t standard; 15.378 t normal; 16.207 t full load

Dimensions: Length overall / water x beam x draught
   434,00 ft / 434,00 ft x 72,00 ft (Bulges 79,00 ft) x 26,50 ft (normal load)
   132,28 m / 132,28 m x 21,95 m (Bulges 24,08 m)  x 8,08 m

Armament:
      6 - 12,00" / 305 mm guns (3x2 guns), 800,00lbs / 362,87kg shells, 1900 Model
     Breech loading guns in turrets (on barbettes)
     on centreline, evenly spread
     Aft Main mounts separated by engine room
      8 - 6,00" / 152 mm guns in single mounts, 100,00lbs / 45,36kg shells, 1905 Model
     Quick firing guns in casemate mounts
     on side, evenly spread
     8 guns in hull casemates - Limited use in heavy seas
      8 - 6,00" / 152 mm guns (4x2 guns), 100,00lbs / 45,36kg shells, 1905 Model
     Quick firing guns in deck mounts with hoists
     on side, evenly spread
      4 - 1,00" / 25,4 mm guns in single mounts, 0,50lbs / 0,23kg shells, 1905 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 6.402 lbs / 2.904 kg
   Shells per gun, main battery: 120
   2 - 18,0" / 457,2 mm submerged torpedo tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12,0" / 305 mm   245,00 ft / 74,68 m   12,00 ft / 3,66 m
   Ends:   4,00" / 102 mm   140,00 ft / 42,67 m   10,00 ft / 3,05 m
     49,00 ft / 14,94 m Unarmoured ends
   Upper:   8,00" / 203 mm   245,00 ft / 74,68 m   8,00 ft / 2,44 m
     Main Belt covers 87 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   14,0" / 356 mm   10,0" / 254 mm      13,0" / 330 mm
   2nd:   3,00" / 76 mm         -         8,00" / 203 mm
   3rd:   2,00" / 51 mm         -         6,00" / 152 mm
   4th:   1,00" / 25 mm         -               -

   - Armour deck: 2,90" / 74 mm, Conning tower: 6,00" / 152 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 34.138 shp / 25.467 Kw = 22,50 kts
   Range 8.000nm at 12,00 kts
   Bunker at max displacement = 1.864 tons

Complement:
   689 - 897

Cost:
   £1,380 million / $5,519 million

Distribution of weights at normal displacement:
   Armament: 864 tons, 5,6 %
   Armour: 5.706 tons, 37,1 %
      - Belts: 2.532 tons, 16,5 %
      - Torpedo bulkhead: 0 tons, 0,0 %
      - Armament: 1.877 tons, 12,2 %
      - Armour Deck: 1.217 tons, 7,9 %
      - Conning Tower: 80 tons, 0,5 %
   Machinery: 1.272 tons, 8,3 %
   Hull, fittings & equipment: 5.398 tons, 35,1 %
   Fuel, ammunition & stores: 1.788 tons, 11,6 %
   Miscellaneous weights: 350 tons, 2,3 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     20.721 lbs / 9.399 Kg = 24,0 x 12,0 " / 305 mm shells or 2,7 torpedoes
   Stability (Unstable if below 1.00): 1,07
   Metacentric height 3,5 ft / 1,1 m
   Roll period: 17,8 seconds
   Steadiness   - As gun platform (Average = 50 %): 53 %
         - Recoil effect (Restricted arc if above 1.00): 0,66
   Seaboat quality  (Average = 1.00): 1,29

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,592
   Length to Beam Ratio: 5,49 : 1
   'Natural speed' for length: 20,83 kts
   Power going to wave formation at top speed: 57 %
   Trim (Max stability = 0, Max steadiness = 100): 41
   Bow angle (Positive = bow angles forward): -14,00 degrees
   Stern overhang: -5,00 ft / -1,52 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      22,00 ft / 6,71 m
      - Forecastle (30 %):   22,00 ft / 6,71 m
      - Mid (40 %):      22,00 ft / 6,71 m
      - Quarterdeck (20 %):   22,00 ft / 6,71 m
      - Stern:      22,00 ft / 6,71 m
      - Average freeboard:   22,00 ft / 6,71 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 73,8 %
      - Above water (accommodation/working, high = better): 138,0 %
   Waterplane Area: 22.692 Square feet or 2.108 Square metres
   Displacement factor (Displacement / loading): 99 %
   Structure weight / hull surface area: 148 lbs/sq ft or 723 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,89
      - Longitudinal: 2,89
      - Overall: 1,00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is excellent
   Good seaboat, rides out heavy weather easily

Misc Weight as follows:
250tons FC
50 tons Flag facilities
25 tons Marconi
15 tons Climate control
10 tons torpedos


Cost:

Base (includes FC, freeboard raise and bulges):
25% $= 3,19$
10% BP= 1,28 BP

Armor=
Increase in armor= current armor 5706 - Previous armor 5425= 281 tons
cost=
0,28 $
0.28 BP

Machinery=
New Machinery= 1271 tons.
Cost=
2.54 $
1.27 BP

Weapons=
New weapons 864- Old weapons 874= -8 tons
Cost=
?- I assume 0

total cost=
6,13 $
2,95 BP

Old machinery to be scrapped. (scrapping rules I do understand :)).
1619 tons/1000*0,15=
0.24 $
0.24 BP

Total cost of the operation (rebuild-scrapping)=
5,89 $
2,71 BP.

[RAM]

Botched it, when posting it before, I copy/pasted the stats of a version with no flush deck I was also considering before deciding for the flush deck one.

Right stats are there now.

[Guinness]

I'll admit to not having taken the time to check your cost figures completely, but the armament line stands out:

What are you doing with the armament removed from the ship? If scrapping it, it's only worth 15% of it's value in $ and BP. The only way you could get full value for it is to sell it to someone else for sticker price (as we say in the States).

A lot of us when contemplating this sort of work have taken the old armament and turned it into coastal fortifications, etc. instead of scrapping it to try to retain more of the value.

[RAM]

well, the retired weapons are the 3'' guns. I plan to emplace them in coastal fortifications :).

[Guinness]

Ok, that makes sense. The cost of the twin secondary mountings themselves probably has to be captured somewhere, but I think that's done well enough in the hull costs and the armor costs.

In real life, I'm not sure that guns designed for casemate mountings could be reemplaced in twin gunhouses easily, but we don't really have anything in the rules either way on that, so I'm not going to worry about it.

Your figures look good to me, except FC should be functional misc weight and I think broken out separately, as should be the difference in light displacement to account for additional material in the hull. So that would add $0.25 and 0.25BP for the FC and $0.84 and 0.84BP for the hull changes, etc.

Now if I can make some time today: maybe the CSA ought to do something similar to CSS Virginia :)

[The Rock Doctor]

I've been thinking of similar work for my Invencibles, but my new construction megalomania keeps getting the better of me.

[Guinness]

If only we could do something about the CSA/GC arms race...

[The Rock Doctor]

More BP would help us do better...

[P3D]

Comments.

1. The new machinery would definitely fit in the hull.
2. The increase in freeboard needs too much of a rebuild, plus raising the two barbettes that SS2 cannot really handle it. Keep the freeboard as it is.
3. 1m bulges on both sides are not offering much torpedo protection. You don't have Torpedo bulkhead.
4. The aft twin 6" mounts interferes with the firing arcs of Q and X turrets.

So...

You are doing a complete reconstruction. That means starting price is ~ $2.6 and 1.3BP

Step 1.
Start with the original SS2.

Keep the freeboard.  Otherwise even making a basic cost estimate will get difficult.
About bulges and TDS. Internally, you need less volume, and the coal bunkers on the hull sides would be changed. So you could put an armored bulkhead in the ship, but it won't be as strong as a purposely designed one. This additional armor would be about 500t (0.5BP and $0.5).

Step 2. Change machinery, cost is ~1.2BP and $2.4. It should fit in the hull nicely
Increase misc weight to 350t. Adjust bunkerage/range until your hull  strength is about the same. This is your ship without bulges. Add the difference between the old and new hull weight to the cost, and write down the hull weight.

Step 3. Assume 1.5m bulges on both sides - you need at least as much to provide any protection. To calculate the weight, assume you are adding 5cm plating on the ship - sides, top and bottom. Your bulges must go up to the level of the aft freeboard, joining the hull above the main belt. Hull plating is usually 2-4cm thick, the rest goes into other structural elements.

Total 'height' is 1.5+1.5 (top and bottom)+8+4~15m. Assume 80m length. So the weight(mass) of the added bulges is about 2x15mx80mx0.05mx8t/m3=960t. Keep it as a reference.
The cost for it would be an additional 1BP and $0.5.

Step 4. Now add the bulges in SS2, with keeping the block coefficient (instead of the displacement!) the same, the bulges would not change it much. Your ship should have a lot of structural strength left. Now increase bunkerage (to represent ballast) until you hull weight increased by the above ~960t.

So your cost would be
2.6+0.5+2.4+0.5+0.5(FCS misc weight)=$6.5. Add whatever changes to the hull weight in Step 1.

BP cost is
1.3(reconstruction)+0.5(TDS)+1.2(machinery)+1(bulges)+0.5(FCS misc weight)=4.5BP.
Add whatever changes to the hull weight in Step 1.

[RAM]

Comments.

1. The new machinery would definitely fit in the hull.
2. The increase in freeboard needs too much of a rebuild, plus raising the two barbettes that SS2 cannot really handle it. Keep the freeboard as it is.
3. 1m bulges on both sides are not offering much torpedo protection. You don't have Torpedo bulkhead.
4. The aft twin 6" mounts interferes with the firing arcs of Q and X turrets.

1- I agree ;)

2- well, that's why it's a reconstruction. Rules state clearly that raising barbettes is possible. Besides, I'm not that sure SS2 can't handle raised barbettes. The raised barbettes cause a big increase in armor weight and SS for sure notices it. Double-checked it while I was designing the ship as rebuilt, and for sure that weight is there. In fact I had both a flush deck version and a "old freeboard" version. the posted one is the flush deck and has almost 800 extra tons of armor in the Weapons armor department vs the version without any freeboard modification.
That is, the armor of the raised barbettes IS simmed in SS2. And believe me, it's a big hit in structural strenght...the lower freeboard version has quite more deck armor and a bigger magazine ;).

3- Bulges were added to slightly increase stability, not to add protection per se. About the internal bulkhead, well, a 12500 ton ship is not really expected to have a BH. However I'll sim the bulges as you proposed (makes a lot of sense), and then toy around with an internal BH. Chances are it won't be added, however, even more if I add wide bulges to the ship.

4- disregard the drawing, it's mistaken. The aft twin mounts aren't there, but just behind the fore ones.


Thanks for the insight on how to properly add bulges. I'll experiment a bit tomorrow with SS2 and see what can I do with it :).

BTW I royally SUCK at drawing bulges...for now they won't be added to the drawing.



Guinness:

In real life, I'm not sure that guns designed for casemate mountings could be reemplaced in twin gunhouses easily, but we don't really have anything in the rules either way on that, so I'm not going to worry about it.

Your figures look good to me, except FC should be functional misc weight and I think broken out separately, as should be the difference in light displacement to account for additional material in the hull. So that would add $0.25 and 0.25BP for the FC and $0.84 and 0.84BP for the hull changes, etc.

Re. the guns. The original 25 de Mayo had 8 guns in casemates, and 8 guns in single mounts. All of them 6''. One has to assume that if you can put a gun both in a single turret or a casemate, you can also put it in a twin mount :). Even if that's not the case (and the 6''ers were different in the casemates as in the turrets), the 8 guns in single mounts would be the "turret version" and so easily mounted in a twin mount. That's my take anyway.

And BTW, you're dead right on the FC, is functional misc weight. I'll take it in account tomorrow when I work on the SS2 final version of the ship.

[Jefgte]

IMO,
1 - 6" in twin turrets are very difficult mechanical modifs.
2 - You could increase stem freeboard (idem to BB Marat) to have better sea boat quality.
3 - No problem for small bulges & new modern boilers.
With that rebuilt at 22.5 kts your BB could be useful in modern Allianza Squadron.


;)

[RAM]

Jefgte:
1- They are not turrets, they're open mounts. The original ship had 8 single mounts with hoists. Reconstructed ship has 4 twin single mounts with hoists. They're not that problematic to add.
2- I have to make a big increase in stem to get a noticeable advantage in seakeeping. As I like the looks of the ship, I'll keep it as it is now :).
3- Yeah, the 22.5 knot mark was intentional. I want the ship to be able to form in a battleline with the future Independencias, and the rest of the alliance.



Ok, finally I got to work with the ship. I included an internal bulkhead because it turned out to be less costly than what I anticipated.

changes:
-erased submerged torpedoes and related misc weight
-bigger bulges, around 1.5m wide each
-internal bulkhead 1.5 inches thick
-increased casemate armor
-heavier machinery as a result of bulging.
-Larger bunkerage. Part as a result of bulging, part to increase range.
-longer main and upper belts than the previous design (the original ship has a too long main belt for the new machinery. By cutting it a bit, same with the upper one, I save armor weight while still keeping all vitals well protected ;)).

The flush deck remains in place, btw.


Veinticinco de Mayo, NUS Battleship laid down 1905 (Engine 1916)

Displacement:
   14.784 t light; 15.534 t standard; 17.514 t normal; 19.098 t full load

Dimensions: Length overall / water x beam x draught
   434,00 ft / 434,00 ft x 72,00 ft (Bulges 82,00 ft) x 26,50 ft (normal load)
   132,28 m / 132,28 m x 21,95 m (Bulges 24,99 m)  x 8,08 m

Armament:
     6 - 12,00" / 305 mm guns (3x2 guns), 864,00lbs / 391,90kg shells, 1900 Model
     Breech loading guns in turrets (on barbettes)
     on centreline, evenly spread
     Aft Main mounts separated by engine room
     8 - 6,00" / 152 mm guns in single mounts, 108,00lbs / 48,99kg shells, 1905 Model
     Breech loading guns in casemate mounts
     on side, evenly spread
     8 guns in hull casemates - Limited use in heavy seas
     8 - 6,00" / 152 mm guns (4x2 guns), 108,00lbs / 48,99kg shells, 1905 Model
     Breech loading guns in deck mounts with hoists
     on side, evenly spread
     4 - 1,00" / 25,4 mm guns in single mounts, 0,50lbs / 0,23kg shells, 1905 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 6.914 lbs / 3.136 kg
   Shells per gun, main battery: 100

Armour:
  - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12,0" / 305 mm   272,00 ft / 82,91 m   12,00 ft / 3,66 m
   Ends:   4,00" / 102 mm   162,00 ft / 49,38 m   10,00 ft / 3,05 m
   Upper:   8,00" / 203 mm   272,00 ft / 82,91 m   8,00 ft / 2,44 m
     Main Belt covers 96 % of normal length

  - Torpedo Bulkhead and Bulges:
      1,50" / 38 mm   272,00 ft / 82,91 m   24,25 ft / 7,39 m

  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   14,0" / 356 mm   10,0" / 254 mm      13,0" / 330 mm
   2nd:   8,00" / 203 mm         -         8,00" / 203 mm
   3rd:   2,00" / 51 mm         -         6,00" / 152 mm
   4th:   1,00" / 25 mm         -               -

  - Armour deck: 2,90" / 74 mm, Conning tower: 6,00" / 152 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 38.239 shp / 28.526 Kw = 22,50 kts
   Range 14.450nm at 12,00 kts
   Bunker at max displacement = 3.564 tons

Complement:
   760 - 989

Cost:
   £1,443 million / $5,771 million

Distribution of weights at normal displacement:
   Armament: 864 tons, 4,9 %
   Armour: 6.520 tons, 37,2 %
      - Belts: 2.764 tons, 15,8 %
      - Torpedo bulkhead: 366 tons, 2,1 %
      - Armament: 2.019 tons, 11,5 %
      - Armour Deck: 1.284 tons, 7,3 %
      - Conning Tower: 87 tons, 0,5 %
   Machinery: 1.425 tons, 8,1 %
   Hull, fittings & equipment: 5.635 tons, 32,2 %
   Fuel, ammunition & stores: 2.731 tons, 15,6 %
   Miscellaneous weights: 340 tons, 1,9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     25.847 lbs / 11.724 Kg = 29,9 x 12,0 " / 305 mm shells or 4,6 torpedoes
   Stability (Unstable if below 1.00): 1,11
   Metacentric height 3,7 ft / 1,1 m
   Roll period: 17,8 seconds
   Steadiness   - As gun platform (Average = 50 %): 55 %
         - Recoil effect (Restricted arc if above 1.00): 0,57
   Seaboat quality  (Average = 1.00): 1,18

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,650
   Length to Beam Ratio: 5,29 : 1
   'Natural speed' for length: 20,83 kts
   Power going to wave formation at top speed: 59 %
   Trim (Max stability = 0, Max steadiness = 100): 46
   Bow angle (Positive = bow angles forward): -14,00 degrees
   Stern overhang: -5,00 ft / -1,52 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      22,00 ft / 6,71 m
      - Forecastle (30 %):   22,00 ft / 6,71 m
      - Mid (40 %):      22,00 ft / 6,71 m
      - Quarterdeck (20 %):   22,00 ft / 6,71 m
      - Stern:      22,00 ft / 6,71 m
      - Average freeboard:   22,00 ft / 6,71 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 91,6 %
      - Above water (accommodation/working, high = better): 132,0 %
   Waterplane Area: 23.938 Square feet or 2.224 Square metres
   Displacement factor (Displacement / loading): 105 %
   Structure weight / hull surface area: 147 lbs/sq ft or 719 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,90
      - Longitudinal: 2,59
      - Overall: 1,00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent

Misc Weight as follows:
250 tons FC
50 tons captain accomodation
25 tons Marconi
15 tons Climate control

Costs:
Base:
25% $= 3,19$
10% BP= 1,28 BP

Armor=
Increase in armor= current armor 6520 - Previous armor 5425= 995 tons
cost=
1 $
1 BP

Machinery=
New Machinery= 1425 tons.
Cost=
2.9 $
1.45 BP

FC:
0.5 $
0.5 BP

Weapons=
0


total cost=
7,59 $
4,23 BP

Old machinery to be scrapped. (scrapping rules I do understand Smiley).
1619 tons/1000*0,15=
0.24 $
0.24 BP

Total cost of the operation (rebuild-scrapping)=
7,35 $
3,99 BP

Not bad a result for the cost, I guess.

comments?

[maddox]

4 twin single mounts with hoists

?????  Twin Single mounts?

I think it's just  twin deck mount with hoists.

[P3D]

Composite Strength of 1.00 means newly built ship. For rebuilds that is invalid.

So you have to take paper and pencil to calculate how much structure you have to add for the required changes.
As I mentioned, the bulges themselves should increase hull weight by ~1000t.
Now the weight for the increased freeboard.

Deck plating, 1300m2 for 2cm thickness is an additional 200t.
Bulkheads: Assume four of them running fore-aft, each 1.25cm thick, total weight 2.5m x 80m x 0.05 x 8 = 80t.
So the " Hull, fittings & equipment": should be 6900 tons minimum, not 5600t.

Then we should not get into hull form and such, as changing draught cannot be simulated by SS2.