Rebuilt too...

[Jefgte]

As my "well loved neighbour" NUS made;

It is certainly interresting for the 1st BS (Atahualpa...) at the horizon 1918, when Waskhar enter in service (in the 2nd BS) ...to rebuilt slightly the demi-Dreadnought Autofagasta & LaPaz.
They could be precious to engage enemy Cruisers & DDs in the battleline, the job of the escort cruisers.

http://www.navalism.org/index.php?topic=2256.0

The rebuilt 'll be to change the boilers & turbines, with the 1916 techno, & increase the speed to 21kts, idem to Atahualpa.
Increase the SHP from 19300 to 24000.
This rebuilt is not very expensive.

Originaly built

Autofagasta - LD 1905 - engine 1906 - in service 1908
La Paz - LD 1908 - engine 1909 - in service 1911



Autofagasta class, Peru 12300T BB laid down 1905 (Engine 1906)

Displacement:
   12 300 t light; 12 940 t standard; 13 884 t normal; 14 639 t full load

Dimensions: Length overall / water x beam x draught
   492.13 ft / 492.13 ft x 78.74 ft x 21.08 ft (normal load)
   150.00 m / 150.00 m x 24.00 m  x 6.42 m

Armament:
      4 - 13.39" / 340 mm guns (2x2 guns), 1 200.00lbs / 544.31kg shells, 1905 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread
      10 - 5.98" / 152 mm guns in single mounts, 107.15lbs / 48.60kg shells, 1905 Model
     Breech loading guns in casemate mounts
     on side, evenly spread
      8 - 3.54" / 90.0 mm guns in single mounts, 22.24lbs / 10.09kg shells, 1905 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
      4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1905 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 6 050 lbs / 2 744 kg
   Shells per gun, main battery: 104
   4 - 18.0" / 457.2 mm submerged torpedo tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12.6" / 320 mm   328.08 ft / 100.00 m   9.19 ft / 2.80 m
   Ends:   3.00" / 76 mm   124.67 ft / 38.00 m   8.01 ft / 2.44 m
     39.37 ft / 12.00 m Unarmoured ends
   Upper:   2.36" / 60 mm   328.08 ft / 100.00 m   7.55 ft / 2.30 m
     Main Belt covers 103 % of normal length

   - Torpedo Bulkhead:
      1.18" / 30 mm   328.08 ft / 100.00 m   20.96 ft / 6.39 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   12.6" / 320 mm   3.94" / 100 mm      11.0" / 280 mm
   2nd:   2.36" / 60 mm         -               -
   3rd:   0.79" / 20 mm         -               -
   4th:   0.50" / 13 mm         -               -

   - Armour deck: 2.95" / 75 mm, Conning tower: 11.02" / 280 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 19 300 shp / 14 398 Kw = 20.02 kts
   Range 7 000nm at 10.00 kts
   Bunker at max displacement = 1 699 tons

Complement:
   639 - 831

Cost:
   £1.241 million / $4.963 million

Distribution of weights at normal displacement:
   Armament: 756 tons, 5.4 %
   Armour: 4 854 tons, 35.0 %
      - Belts: 2 022 tons, 14.6 %
      - Torpedo bulkhead: 301 tons, 2.2 %
      - Armament: 854 tons, 6.1 %
      - Armour Deck: 1 541 tons, 11.1 %
      - Conning Tower: 137 tons, 1.0 %
   Machinery: 1 253 tons, 9.0 %
   Hull, fittings & equipment: 5 087 tons, 36.6 %
   Fuel, ammunition & stores: 1 584 tons, 11.4 %
   Miscellaneous weights: 350 tons, 2.5 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     18 632 lbs / 8 451 Kg = 15.5 x 13.4 " / 340 mm shells or 3.4 torpedoes
   Stability (Unstable if below 1.00): 1.24
   Metacentric height 5.1 ft / 1.6 m
   Roll period: 14.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 72 %
         - Recoil effect (Restricted arc if above 1.00): 0.42
   Seaboat quality  (Average = 1.00): 1.39

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.595
   Length to Beam Ratio: 6.25 : 1
   'Natural speed' for length: 22.18 kts
   Power going to wave formation at top speed: 45 %
   Trim (Max stability = 0, Max steadiness = 100): 52
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      20.34 ft / 6.20 m
      - Forecastle (18 %):   17.06 ft / 5.20 m
      - Mid (50 %):      13.78 ft / 4.20 m
      - Quarterdeck (18 %):   13.78 ft / 4.20 m
      - Stern:      13.78 ft / 4.20 m
      - Average freeboard:   15.13 ft / 4.61 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 102.3 %
      - Above water (accommodation/working, high = better): 122.8 %
   Waterplane Area: 28 209 Square feet or 2 621 Square metres
   Displacement factor (Displacement / loading): 101 %
   Structure weight / hull surface area: 136 lbs/sq ft or 664 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.38
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

[Jefgte]

The rebuilt with the 1916 engine techno - 24000SHP

Autofagasta class, Peru 12300T BB laid down 1905 (Engine 1916)

Displacement:
   12 636 t light; 13 276 t standard; 13 884 t normal; 14 370 t full load

Dimensions: Length overall / water x beam x draught
   492.13 ft / 492.13 ft x 78.74 ft x 21.08 ft (normal load)
   150.00 m / 150.00 m x 24.00 m  x 6.42 m

Armament:
      4 - 13.39" / 340 mm guns (2x2 guns), 1 200.00lbs / 544.31kg shells, 1905 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread
      10 - 5.98" / 152 mm guns in single mounts, 107.15lbs / 48.60kg shells, 1905 Model
     Breech loading guns in casemate mounts
     on side, evenly spread
      8 - 3.54" / 90.0 mm guns in single mounts, 22.24lbs / 10.09kg shells, 1905 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
      4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1905 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 6 050 lbs / 2 744 kg
   Shells per gun, main battery: 104
   4 - 18.0" / 457.2 mm submerged torpedo tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12.6" / 320 mm   328.08 ft / 100.00 m   9.19 ft / 2.80 m
   Ends:   3.00" / 76 mm   124.67 ft / 38.00 m   8.01 ft / 2.44 m
     39.37 ft / 12.00 m Unarmoured ends
   Upper:   2.36" / 60 mm   328.08 ft / 100.00 m   7.55 ft / 2.30 m
     Main Belt covers 103 % of normal length

   - Torpedo Bulkhead:
      1.18" / 30 mm   328.08 ft / 100.00 m   20.96 ft / 6.39 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   12.6" / 320 mm   3.94" / 100 mm      11.0" / 280 mm
   2nd:   2.36" / 60 mm         -               -
   3rd:   0.79" / 20 mm         -               -
   4th:   0.50" / 13 mm         -               -

   - Armour deck: 2.95" / 75 mm, Conning tower: 11.02" / 280 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 24 000 shp / 17 904 Kw = 21.19 kts
   Range 7 000nm at 10.00 kts
   Bunker at max displacement = 1 093 tons

Complement:
   639 - 831

Cost:
   £1.202 million / $4.809 million

Distribution of weights at normal displacement:
   Armament: 756 tons, 5.4 %
   Armour: 4 854 tons, 35.0 %
      - Belts: 2 022 tons, 14.6 %
      - Torpedo bulkhead: 301 tons, 2.2 %
      - Armament: 854 tons, 6.1 %
      - Armour Deck: 1 541 tons, 11.1 %
      - Conning Tower: 137 tons, 1.0 %
   Machinery: 894 tons, 6.4 %
   Hull, fittings & equipment: 5 782 tons, 41.6 %
   Fuel, ammunition & stores: 1 248 tons, 9.0 %
   Miscellaneous weights: 350 tons, 2.5 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     20 828 lbs / 9 447 Kg = 17.4 x 13.4 " / 340 mm shells or 4.0 torpedoes
   Stability (Unstable if below 1.00): 1.21
   Metacentric height 5.0 ft / 1.5 m
   Roll period: 14.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 64 %
         - Recoil effect (Restricted arc if above 1.00): 0.40
   Seaboat quality  (Average = 1.00): 1.24

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.595
   Length to Beam Ratio: 6.25 : 1
   'Natural speed' for length: 22.18 kts
   Power going to wave formation at top speed: 48 %
   Trim (Max stability = 0, Max steadiness = 100): 52
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      20.34 ft / 6.20 m
      - Forecastle (18 %):   17.06 ft / 5.20 m
      - Mid (50 %):      13.78 ft / 4.20 m
      - Quarterdeck (18 %):   13.78 ft / 4.20 m
      - Stern:      13.78 ft / 4.20 m
      - Average freeboard:   15.13 ft / 4.61 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 90.8 %
      - Above water (accommodation/working, high = better): 122.8 %
   Waterplane Area: 28 209 Square feet or 2 621 Square metres
   Displacement factor (Displacement / loading): 106 %
   Structure weight / hull surface area: 155 lbs/sq ft or 755 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.09
      - Longitudinal: 1.59
      - Overall: 1.13
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent
   Good seaboat, rides out heavy weather easily

[Jefgte]

1916 machinery is lighter than 1915 & had better performances.
so, I could increase the cruised speed & the secondary armament from 10x152 to 16x152.
The ship is lighter...
12300t as built & 12186 after rebuilt...
Other idea is also to remove T2x340 & install T3x275 from GC(?)
A better gun to engage cruisers.


Autofagasta class, Peru 12300T BB laid down 1905 (Engine 1912)

Displacement:
   12 186 t light; 12 861 t standard; 13 884 t normal; 14 702 t full load

Dimensions: Length overall / water x beam x draught
   492.13 ft / 492.13 ft x 78.74 ft x 21.08 ft (normal load)
   150.00 m / 150.00 m x 24.00 m  x 6.42 m

Armament:
      4 - 13.39" / 340 mm guns (2x2 guns), 1 199.24lbs / 543.97kg shells, 1905 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread
      16 - 5.98" / 152 mm guns in single mounts, 107.15lbs / 48.60kg shells, 1905 Model
     Breech loading guns in casemate mounts
     on side, evenly spread, 6 raised mounts
      4 - 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
      4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1905 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 6 566 lbs / 2 978 kg
   Shells per gun, main battery: 104

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12.6" / 320 mm   328.08 ft / 100.00 m   9.19 ft / 2.80 m
   Ends:   3.00" / 76 mm   124.67 ft / 38.00 m   8.01 ft / 2.44 m
     39.37 ft / 12.00 m Unarmoured ends
   Upper:   2.36" / 60 mm   328.08 ft / 100.00 m   7.55 ft / 2.30 m
     Main Belt covers 103 % of normal length

   - Torpedo Bulkhead:
      1.18" / 30 mm   328.08 ft / 100.00 m   20.96 ft / 6.39 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   12.6" / 320 mm   3.94" / 100 mm      11.0" / 280 mm
   2nd:   2.36" / 60 mm         -               -
   3rd:   0.79" / 20 mm         -               -
   4th:   0.50" / 13 mm         -               -

   - Armour deck: 2.95" / 75 mm, Conning tower: 11.02" / 280 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 24 000 shp / 17 904 Kw = 21.19 kts
   Range 7 000nm at 12.00 kts
   Bunker at max displacement = 1 841 tons

Complement:
   639 - 831

Cost:
   £1.250 million / $5.000 million

Distribution of weights at normal displacement:
   Armament: 821 tons, 5.9 %
   Armour: 4 897 tons, 35.3 %
      - Belts: 2 022 tons, 14.6 %
      - Torpedo bulkhead: 301 tons, 2.2 %
      - Armament: 896 tons, 6.5 %
      - Armour Deck: 1 541 tons, 11.1 %
      - Conning Tower: 137 tons, 1.0 %
   Machinery: 957 tons, 6.9 %
   Hull, fittings & equipment: 5 162 tons, 37.2 %
   Fuel, ammunition & stores: 1 698 tons, 12.2 %
   Miscellaneous weights: 350 tons, 2.5 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     20 214 lbs / 9 169 Kg = 16.9 x 13.4 " / 340 mm shells or 3.9 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 %): 65 %
         - Recoil effect (Restricted arc if above 1.00): 0.42
   Seaboat quality  (Average = 1.00): 1.25

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.595
   Length to Beam Ratio: 6.25 : 1
   'Natural speed' for length: 22.18 kts
   Power going to wave formation at top speed: 48 %
   Trim (Max stability = 0, Max steadiness = 100): 52
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      20.34 ft / 6.20 m
      - Forecastle (18 %):   17.06 ft / 5.20 m
      - Mid (50 %):      13.78 ft / 4.20 m
      - Quarterdeck (18 %):   13.78 ft / 4.20 m
      - Stern:      13.78 ft / 4.20 m
      - Average freeboard:   15.13 ft / 4.61 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 94.0 %
      - Above water (accommodation/working, high = better): 122.8 %
   Waterplane Area: 28 209 Square feet or 2 621 Square metres
   Displacement factor (Displacement / loading): 101 %
   Structure weight / hull surface area: 138 lbs/sq ft or 674 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.41
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent
   Good seaboat, rides out heavy weather easily

Autofagasta - LD 1905 - engine 1906 - in service 1908 - rebuilt 1917
La Paz - LD 1908 - engine 1909 - in service 1911 - rebuilt 1917

[Jefgte]

Autofagasta - LD 1905 - engine 1906 - in service 1908 -
La Paz - LD 1908 - engine 1909 - in service 1911 -
- Testing the rebuilt in 1917 as escort cruiser
  with 22.4 kts & 2T3x275

Autofagasta class, Peru 12300T BB laid down 1905 (Engine 1912)

Displacement:
   12 165 t light; 12 861 t standard; 13 884 t normal; 14 702 t full load

Dimensions: Length overall / water x beam x draught
   492.13 ft / 492.13 ft x 78.74 ft x 21.08 ft (normal load)
   150.00 m / 150.00 m x 24.00 m  x 6.42 m

Armament:
      6 - 10.83" / 275 mm guns (2x3 guns), 634.55lbs / 287.83kg shells, 1905 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread
      16 - 5.98" / 152 mm guns in single mounts, 107.15lbs / 48.60kg shells, 1905 Model
     Breech loading guns in casemate mounts
     on side, evenly spread, 6 raised mounts
      4 - 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
      4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1905 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 5 576 lbs / 2 529 kg
   Shells per gun, main battery: 128

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   9.45" / 240 mm   328.08 ft / 100.00 m   12.73 ft / 3.88 m
   Ends:   3.00" / 76 mm   124.67 ft / 38.00 m   8.01 ft / 2.44 m
     39.37 ft / 12.00 m Unarmoured ends
   Upper:   2.36" / 60 mm   328.08 ft / 100.00 m   7.55 ft / 2.30 m
     Main Belt covers 103 % of normal length

   - Torpedo Bulkhead:
      1.18" / 30 mm   328.08 ft / 100.00 m   20.96 ft / 6.39 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   11.0" / 280 mm   3.94" / 100 mm      11.0" / 280 mm
   2nd:   2.36" / 60 mm         -               -
   3rd:   0.79" / 20 mm         -               -
   4th:   0.50" / 13 mm         -               -

   - Armour deck: 2.95" / 75 mm, Conning tower: 9.45" / 240 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 30 000 shp / 22 380 Kw = 22.44 kts
   Range 7 000nm at 12.00 kts
   Bunker at max displacement = 1 841 tons

Complement:
   639 - 831

Cost:
   £1.179 million / $4.715 million

Distribution of weights at normal displacement:
   Armament: 697 tons, 5.0 %
   Armour: 4 935 tons, 35.5 %
      - Belts: 2 087 tons, 15.0 %
      - Torpedo bulkhead: 301 tons, 2.2 %
      - Armament: 889 tons, 6.4 %
      - Armour Deck: 1 541 tons, 11.1 %
      - Conning Tower: 118 tons, 0.8 %
   Machinery: 1 196 tons, 8.6 %
   Hull, fittings & equipment: 4 987 tons, 35.9 %
   Fuel, ammunition & stores: 1 719 tons, 12.4 %
   Miscellaneous weights: 350 tons, 2.5 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     21 008 lbs / 9 529 Kg = 33.1 x 10.8 " / 275 mm shells or 3.9 torpedoes
   Stability (Unstable if below 1.00): 1.24
   Metacentric height 5.2 ft / 1.6 m
   Roll period: 14.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 63 %
         - Recoil effect (Restricted arc if above 1.00): 0.37
   Seaboat quality  (Average = 1.00): 1.20

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.595
   Length to Beam Ratio: 6.25 : 1
   'Natural speed' for length: 22.18 kts
   Power going to wave formation at top speed: 51 %
   Trim (Max stability = 0, Max steadiness = 100): 52
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      23.62 ft / 7.20 m
      - Forecastle (18 %):   20.34 ft / 6.20 m
      - Mid (50 %):      13.78 ft / 4.20 m
      - Quarterdeck (18 %):   13.78 ft / 4.20 m
      - Stern:      13.78 ft / 4.20 m
      - Average freeboard:   16.25 ft / 4.95 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 93.4 %
      - Above water (accommodation/working, high = better): 129.7 %
   Waterplane Area: 28 209 Square feet or 2 621 Square metres
   Displacement factor (Displacement / loading): 105 %
   Structure weight / hull surface area: 132 lbs/sq ft or 643 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.47
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent
   Good seaboat, rides out heavy weather easily

[The Rock Doctor]

I think the twin 340mm would be a more effective battleship battery than two triple 275mm.

[Jefgte]

340 boardside is 4352kg with 8 shells per mn
275 boardside is 3600kg with 12 shells per mn - 50% more probability of hit.
...

;)

[Jefgte]

Testing the drawing with T2x340 & 16x152 - TT added.

Note, the forward freeboard is increase by 1m to maintain good seaboat quality at 22.4kts.




;)

[Korpen]

340 boardside is 4352kg with 8 shells per mn
275 boardside is 3600kg with 12 shells per mn - 50% more probability of hit.

Not quite as much, the larger gun got significantly better ballistics, which would help to compensate for the fewer barrels.

[RAM]

the only problem I see with this proposals is that Antofagasta...well, it's a Predread. And a large one at that. 25 de Mayo sports six 305mm guns on that displacement making her a (if barely) adequate ship for a line of battle until well into the 20s if given the speed to do it, which I did with the rebuild. As it is 25 de Mayo's rebuild is touching the line of "not worth it"-ness, but thanks to a light displacement, and the fact that as she is now she's worthless for a fleet action (but indispensable for keeping a credible BB force), compensates for it. In other words: the cost is high but the NUS has to keep the ship no matter what, and if the NUS has to keep it she has to be fast enough to keep pace with the main alliance battleline.

Notice I won't be doing the same with Islas Malvinas. Is quite bigger, will cost quite a bit more, and at 21.5 knots it's staying as it is. The NUS PDs, I simply won't touch. When the new Independencias gradually enter service, they will be downgraded to CDS status and stay in their current configuration, as I don't think investing in rebuilding PDs is worth it.

So, I'm not sure that such an expense of BP and cash is warranted for a 4 gun PD, no matter the caliber is 340mm... They are still too slow to keep pace with a 22.5 knot battleline and even if they did, the cost is too high for so low a return. And you don't need those two ships in your battleline to keep the Peruvian BB force a credible one.

I think you'd be better giving them just an overhaul when time comes, and giving them a pure coast defence role when your new BBs join your battleline.

[Jefgte]

For the Armada, 
12 000t AC or EC with T3x275 is in the Building Plan, in 1918.

12BP - 12$

I could have 2 Autofagasta rebuilt in EC for the price of this cruiser.


;)

[Jefgte]

The first calculation give for one ship:

Old Machinery: 1 253 tons - 0.188BP - 0.188$
Old Armament 756t : 0.113BP - 1.113$
Old Armament Armour : 854t – 0.128BP – 0.128$
Total 2863t – 0.429BP – 0.429$

New Machinery: 1 196 tons - 1.196BP - 2.392$
New Armament : 704t – 0.7BP – 1.4$
New Armament Armour: 894t – 0.9BP – 1.8$
Total 2794t – 2.8BP – 5.6$

Rebuilt in EC cost 2.4BP & 5.2$

[Carthaginian]

I personally think it's a pretty cost-effective way for Peru to keep her fleet chugging along.

I might stick to the 340mm guns, as fire control and the (likely soon) advent of spotting aircraft will make the old pre-dreads more accurate at long-range. The smaller guns, while no slouch, won't have the punch or range of the 340mm's and while retaining the gun size (with a longer caliber) will allow continued use against battleships.

[RAM]

Rebuilt in EC cost 2.4BP & 5.2$

Add the 25% tonnage/1000 cash cost, and the 10% tonnage/1000 BP cost to those numbers... that means 1.2 extra BPs, and around $3 more. final numbers should be around 3.6 BP and $5.2. All that to reach a little bit over 22 knots, upgrade secondaries and put 270mm instead of the 340mm ones. In fact I don't like the whole 270mm instead of 340mm idea but that might be just me.

I insist I'd rather stay with an overhaul to update the secondaries, keep the rest as it is, as 20 knots is as good (or bad) as 21. neither of them allow the ships to keep position in battleline, so save the cost.

Well at least is what I'd do and my own view about it :). Of course, do the best you think.

[Jefgte]

With this rebuilt:
12165t - 2T3x275 + 16x152 + 8x76.2 + 6TTx533 - 22.4kts - very good protection, the Peruvian BS could have 2 correct ECs abble to engage PCs or ACs (not BC) & DDs.


Also... 4T2x340 'll free & could be reuse on a new modern hull... ;D
This new ship could be laid down in 1918 & with 16000t(?) , built just in 2 years in the slipway reserved for the 12 000 AC

For the Armada, 
12 000t AC or EC with T3x275 is in the Building Plan, in 1918.

;)

[RAM]

With this rebuilt:
12165t - 2T3x275 + 16x152 + 8x76.2 + 6TTx533 - 22.4kts - very good protection, the Peruvian BS could have 2 correct ECs abble to engage PCs or ACs (not BC) & DDs.

Hmmm. At 22.4 knots there will be very few DDs, PCs or ACs this ship can force into a fight. Weapons are right, speed is definitely not up to that task

Also... 4T2x340 'll free & could be reuse on a new modern hull... ;D

Certainly you can...but I'm not a big fan of putting dated mounts with dated guns into modern, expensive ships. Now of course you can tell me the turrets can go to some land fortifications or a couple of monitors, that would be a better use for them.


Dunno, Jefgte, I still don't like the concept. I think it's not a good return for the cost. Besides, Antofagasta is your 2nd best class of BBs until Huascar comes on line. Once Huascar is in service they will still be an important part of your battleline (your prior PDs having 12'' guns).
With the weapons change you're bassically downgrading the quality of the battleline by downgrading those ships to the role of AC hunter, a role they aren't really suited to fill given their low top speed...you give up the 3rd and 4th more powerful ships of your battleline to get a ship that won't be really good in the new role because of low speed...you're battleline will be less powerful, and you will have to pay BP and cash for it.

If you really really want that AC hunter no matter what, I'd rather take the Inti class with 12'' weapons, keep them 12'' guns, put turbines into them and increase top speed, raise freeboard and maybe even bulge her. You could easily get 24 or 25 knots from such a ship and would be a much better AC hunter because of higher top speed, could actually fit a role in Alianza fleet as heavy scouts, and you wouldn't have to give up two perfectly usable battleships with 340mm guns.

Of course that's strictly my take on it. It's clear you see things differently :)