Peru 1915-1919 program

[The Rock Doctor]

Probably money well spent, though.  Can you extend the belts more?  A fair bit of unprotected ends there.

[Guinness]

Here's an interesting question/comment about the drawing. Well, interesting to me at least...

I have trouble reconciling 4 mounts evenly spread with "aft main mounts separated by engine room".

Should that mean that the forward mounts could be back to back, but the after ones should have the engine room in between? She'd lose her symmetry that way, but still probably wouldn't look bad. You'd probably have to turn the third mount around.

I think though to get the look you are looking for, you'd want to put the mounts on centerline ends with none superfiring. They could still be back to back. I don't know what if anything SS would do to your composite strength as a result.

[Jefgte]

...
I have trouble reconciling 4 mounts evenly spread with "aft main mounts separated by engine room".

Should that mean that the forward mounts could be back to back, but the after ones should have the engine room in between? She'd lose her symmetry that way, but still probably wouldn't look bad. You'd probably have to turn the third mount around.

I think though to get the look you are looking for, you'd want to put the mounts on centerline ends with none superfiring. They could still be back to back. I don't know what if anything SS would do to your composite strength as a result.

- That is not a Derfflinger disposition
- 2 mounts forward & 2 mounts aft - back to back
- All boilers & engines are under the superstructures.
- No superfiring to economize the weight.

"economize the weight" is always a problem for small countries with short BPs.


;)

[Jefgte]

ala Panzerschiff

I use T3x340 because GC did'nt have T3x275

15000T-2T3x340, Peru AC laid down 1918 (Engine 1916)

Displacement:
   15 000 t light; 15 855 t standard; 16 830 t normal; 17 610 t full load

Dimensions: Length overall / water x beam x draught
   557.08 ft / 554.46 ft x 85.30 ft x 25.68 ft (normal load)
   169.80 m / 169.00 m x 26.00 m  x 7.83 m

Armament:
      6 - 13.39" / 340 mm guns (2x3 guns), 1 200.00lbs / 544.31kg shells, 1918 Model
     Breech loading guns in turrets (on barbettes)
     on centreline, evenly spread
      8 - 4.72" / 120 mm guns in single mounts, 52.72lbs / 23.92kg shells, 1918 Model
     Breech loading guns in casemate mounts
     on side, evenly spread
      4 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1918 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, 1918 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 7 676 lbs / 3 482 kg
   Shells per gun, main battery: 120
   6 - 21.0" / 533.4 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   9.06" / 230 mm   380.58 ft / 116.00 m   12.73 ft / 3.88 m
   Ends:   3.15" / 80 mm   144.36 ft / 44.00 m   10.17 ft / 3.10 m
     29.53 ft / 9.00 m Unarmoured ends
     Main Belt covers 106 % of normal length

   - Torpedo Bulkhead:
      1.57" / 40 mm   380.58 ft / 116.00 m   25.49 ft / 7.77 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   9.06" / 230 mm   4.72" / 120 mm      7.87" / 200 mm
   2nd:   0.79" / 20 mm         -               -
   3rd:   0.79" / 20 mm         -               -
   4th:   0.50" / 13 mm         -               -

   - Armour deck: 2.56" / 65 mm, Conning tower: 9.06" / 230 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 48 000 shp / 35 808 Kw = 25.17 kts
   Range 7 000nm at 12.00 kts
   Bunker at max displacement = 1 755 tons

Complement:
   738 - 960

Cost:
   £3.162 million / $12.647 million

Distribution of weights at normal displacement:
   Armament: 959 tons, 5.7 %
   Armour: 5 032 tons, 29.9 %
      - Belts: 2 046 tons, 12.2 %
      - Torpedo bulkhead: 565 tons, 3.4 %
      - Armament: 821 tons, 4.9 %
      - Armour Deck: 1 472 tons, 8.7 %
      - Conning Tower: 128 tons, 0.8 %
   Machinery: 1 788 tons, 10.6 %
   Hull, fittings & equipment: 6 901 tons, 41.0 %
   Fuel, ammunition & stores: 1 830 tons, 10.9 %
   Miscellaneous weights: 320 tons, 1.9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     20 974 lbs / 9 514 Kg = 17.5 x 13.4 " / 340 mm shells or 3.8 torpedoes
   Stability (Unstable if below 1.00): 1.13
   Metacentric height 5.0 ft / 1.5 m
   Roll period: 16.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 72 %
         - Recoil effect (Restricted arc if above 1.00): 0.51
   Seaboat quality  (Average = 1.00): 1.20

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.485
   Length to Beam Ratio: 6.50 : 1
   'Natural speed' for length: 23.55 kts
   Power going to wave formation at top speed: 51 %
   Trim (Max stability = 0, Max steadiness = 100): 60
   Bow angle (Positive = bow angles forward): 6.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      24.93 ft / 7.60 m
      - Forecastle (18 %):   19.36 ft / 5.90 m
      - Mid (50 %):      15.75 ft / 4.80 m
      - Quarterdeck (17 %):   15.75 ft / 4.80 m
      - Stern:      15.75 ft / 4.80 m
      - Average freeboard:   17.38 ft / 5.30 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 104.7 %
      - Above water (accommodation/working, high = better): 121.8 %
   Waterplane Area: 31 089 Square feet or 2 888 Square metres
   Displacement factor (Displacement / loading): 101 %
   Structure weight / hull surface area: 159 lbs/sq ft or 774 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.94
      - Longitudinal: 1.69
      - 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]

14000T-3T2x275, Peru AC laid down 1918 (Engine 1916)

Displacement:
   14 000 t light; 14 632 t standard; 15 572 t normal; 16 324 t full load

Dimensions: Length overall / water x beam x draught
   593.17 ft / 590.55 ft x 78.74 ft x 24.68 ft (normal load)
   180.80 m / 180.00 m x 24.00 m  x 7.52 m

Armament:
      6 - 10.83" / 275 mm guns (3x2 guns), 661.39lbs / 300.00kg shells, 1918 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, majority forward
      12 - 4.72" / 120 mm guns in single mounts, 52.72lbs / 23.92kg shells, 1918 Model
     Breech loading guns in casemate mounts
     on side, evenly spread
      4 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1918 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, 1918 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 4 655 lbs / 2 112 kg
   Shells per gun, main battery: 120
   6 - 21.0" / 533.4 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   9.06" / 230 mm   400.26 ft / 122.00 m   12.73 ft / 3.88 m
   Ends:   3.15" / 80 mm   164.04 ft / 50.00 m   10.17 ft / 3.10 m
     26.25 ft / 8.00 m Unarmoured ends
     Main Belt covers 104 % of normal length

   - Torpedo Bulkhead:
      1.57" / 40 mm   400.26 ft / 122.00 m   25.49 ft / 7.77 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   9.06" / 230 mm   4.72" / 120 mm      7.87" / 200 mm
   2nd:   0.79" / 20 mm         -               -
   3rd:   0.79" / 20 mm         -               -
   4th:   0.50" / 13 mm         -               -

   - Armour deck: 2.56" / 65 mm, Conning tower: 9.06" / 230 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 60 000 shp / 44 760 Kw = 27.26 kts
   Range 7 000nm at 12.00 kts
   Bunker at max displacement = 1 692 tons

Complement:
   696 - 906

Cost:
   £2.550 million / $10.199 million

Distribution of weights at normal displacement:
   Armament: 562 tons, 3.6 %
   Armour: 5 102 tons, 32.8 %
      - Belts: 2 146 tons, 13.8 %
      - Torpedo bulkhead: 595 tons, 3.8 %
      - Armament: 805 tons, 5.2 %
      - Armour Deck: 1 434 tons, 9.2 %
      - Conning Tower: 122 tons, 0.8 %
   Machinery: 2 235 tons, 14.4 %
   Hull, fittings & equipment: 5 781 tons, 37.1 %
   Fuel, ammunition & stores: 1 572 tons, 10.1 %
   Miscellaneous weights: 320 tons, 2.1 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     21 038 lbs / 9 542 Kg = 33.2 x 10.8 " / 275 mm shells or 3.8 torpedoes
   Stability (Unstable if below 1.00): 1.15
   Metacentric height 4.5 ft / 1.4 m
   Roll period: 15.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.40
   Seaboat quality  (Average = 1.00): 1.19

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.475
   Length to Beam Ratio: 7.50 : 1
   'Natural speed' for length: 24.30 kts
   Power going to wave formation at top speed: 51 %
   Trim (Max stability = 0, Max steadiness = 100): 60
   Bow angle (Positive = bow angles forward): 6.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      24.93 ft / 7.60 m
      - Forecastle (18 %):   19.69 ft / 6.00 m
      - Mid (50 %):      16.08 ft / 4.90 m
      - Quarterdeck (17 %):   16.08 ft / 4.90 m
      - Stern:      16.08 ft / 4.90 m
      - Average freeboard:   17.68 ft / 5.39 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 103.1 %
      - Above water (accommodation/working, high = better): 128.2 %
   Waterplane Area: 30 297 Square feet or 2 815 Square metres
   Displacement factor (Displacement / loading): 108 %
   Structure weight / hull surface area: 132 lbs/sq ft or 645 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.35
      - 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

[Jefgte]

New type of CTB (Coastal Torpedo Boat)

The first type; CTB200t was too small & short for action.
This one, is nearly an half DD & could work with a BS.

CTB400t, Peru CTB laid down 1916 (Engine 1912)

Displacement:
   400 t light; 423 t standard; 462 t normal; 493 t full load

Dimensions: Length overall / water x beam x draught
   228.81 ft / 226.38 ft x 19.69 ft x 9.07 ft (normal load)
   69.74 m / 69.00 m x 6.00 m  x 2.77 m

Armament:
      2 - 4.72" / 120 mm guns in single mounts, 52.72lbs / 23.91kg shells, 1916 Model
     Breech loading guns in deck mounts
     on centreline, evenly spread
      1 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1916 Model
     Quick firing gun in deck mount
     on centreline amidships
      2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1916 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 119 lbs / 54 kg
   Shells per gun, main battery: 200
   3 - 21.0" / 533.4 mm above water torpedoes

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.79" / 20 mm         -               -
   2nd:   0.50" / 13 mm         -               -
   3rd:   0.50" / 13 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 9 600 shp / 7 162 Kw = 27.40 kts
   Range 2 000nm at 12.00 kts
   Bunker at max displacement = 70 tons
    Trial speed 30kts
    Bonus 2.6

Complement:
   49 - 64

Cost:
   £0.091 million / $0.362 million

Distribution of weights at normal displacement:
   Armament: 15 tons, 3.2 %
   Armour: 5 tons, 1.1 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 5 tons, 1.1 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 206 tons, 44.6 %
   Hull, fittings & equipment: 129 tons, 28.0 %
   Fuel, ammunition & stores: 62 tons, 13.4 %
   Miscellaneous weights: 45 tons, 9.7 %
Fire control - 25t
20t reserve :
30 Depth charges - (10t)
+10t Reserve.
or 20 mines.

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     104 lbs / 47 Kg = 2.0 x 4.7 " / 120 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.00
   Metacentric height 0.4 ft / 0.1 m
   Roll period: 12.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.66
   Seaboat quality  (Average = 1.00): 1.03

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.400
   Length to Beam Ratio: 11.50 : 1
   'Natural speed' for length: 15.05 kts
   Power going to wave formation at top speed: 65 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   Bow angle (Positive = bow angles forward): 10.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      13.78 ft / 4.20 m
      - Forecastle (18 %):   10.83 ft / 3.30 m
      - Mid (50 %):      8.86 ft / 2.70 m
      - Quarterdeck (16 %):   7.22 ft / 2.20 m
      - Stern:      6.56 ft / 2.00 m
      - Average freeboard:   9.15 ft / 2.79 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 179.8 %
      - Above water (accommodation/working, high = better): 51.0 %
   Waterplane Area: 2 743 Square feet or 255 Square metres
   Displacement factor (Displacement / loading): 49 %
   Structure weight / hull surface area: 21 lbs/sq ft or 103 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 2.21
      - Overall: 0.58
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped
   Ship has slow, easy roll, a good, steady gun platform

[Korpen]

New type of CTB (Coastal Torpedo Boat)

The first type; CTB200t was too small & short for action.
This one, is nearly an half DD & could work with a BS.

CTB400t, Peru CTB laid down 1916 (Engine 1912)

I think the design is a poor one as it tries to do too much.
With just two main guns she produces a fairly low volume, and given her size and few the FC is unnecessary encumbrance IMO as she starts at a disadvantage when it comes to a firefight and is unlikely to outfight anything.
Her speed is really too low for her size if she is to be used as a torpedoboot, and her range is too short to be used for any form of patrol work.
The amount of misc weight is also excessive, can be reduced to about 10-15ton (for torpedoes and mines), the saved weight used for speed and range.

DD-rules ships are specialists, trying to build a boat that is good at everything usually results in a boats equally useless at everything.

[Jefgte]

DD-rules ships are specialists, trying to build a boat that is good at everything usually results in a boats equally useless at everything.

That's not too difficult to write that when you have BPsssssssss

For small navies multiroles ships are useful to economise BPs.

[Korpen]

DD-rules ships are specialists, trying to build a boat that is good at everything usually results in a boats equally useless at everything.

That's not too difficult to write that when you have BPsssssssss

For small navies multiroles ships are useful to economise BPs.

It is the other way around, a large power can afford to build mediocre ships, and overcome the drawbacks by simply building huge numbers or very large ships. A small power must rationalise and go for the most cost-effective solutions.
So rather then building say two 400-ton "bit of everything"-ships you could get a 400-ton TBs which are faster and longer ranged, much better for torpedo attack, and a long-range gunboat, which got more guns, and range, far superior in all patrol and escort functions.

[Jefgte]

Better one



CTB510, Peru CTB laid down 1916 (Engine 1912)

Displacement:
   510 t light; 534 t standard; 597 t normal; 646 t full load

Dimensions: Length overall / water x beam x draught
   229.27 ft / 226.38 ft x 20.57 ft x 11.35 ft (normal load)
   69.88 m / 69.00 m x 6.27 m  x 3.46 m

Armament:
      2 - 4.72" / 120 mm guns in single mounts, 52.72lbs / 23.91kg shells, 1916 Model
     Breech loading guns in deck mounts
     on centreline, evenly spread
      1 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1916 Model
     Quick firing gun in deck mount
     on centreline amidships
      2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1916 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 119 lbs / 54 kg
   Shells per gun, main battery: 180
   3 - 21.0" / 533.4 mm above water torpedoes

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.79" / 20 mm         -               -
   2nd:   0.50" / 13 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 16 000 shp / 11 936 Kw = 29.64 kts
   Range 2 750nm at 12.00 kts
   Bunker at max displacement = 112 tons
    Trial speed - 31.5kts
Bonus  - 1.86

Complement:
   59 - 78

Cost:
   £0.118 million / $0.472 million

Distribution of weights at normal displacement:
   Armament: 15 tons, 2.5 %
   Armour: 5 tons, 0.8 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 5 tons, 0.8 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 299 tons, 50.0 %
   Hull, fittings & equipment: 178 tons, 29.8 %
   Fuel, ammunition & stores: 87 tons, 14.5 %
   Miscellaneous weights: 14 tons, 2.3 %
    10t -depth charges
    4t -reserves

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     135 lbs / 61 Kg = 2.6 x 4.7 " / 120 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.07
   Metacentric height 0.5 ft / 0.2 m
   Roll period: 11.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.57
   Seaboat quality  (Average = 1.00): 1.03

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.395
   Length to Beam Ratio: 11.00 : 1
   'Natural speed' for length: 15.05 kts
   Power going to wave formation at top speed: 69 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   Bow angle (Positive = bow angles forward): 10.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      16.40 ft / 5.00 m
      - Forecastle (18 %):   13.45 ft / 4.10 m
      - Mid (50 %):      9.51 ft / 2.90 m
      - Quarterdeck (16 %):   8.53 ft / 2.60 m
      - Stern:      7.22 ft / 2.20 m
      - Average freeboard:   10.64 ft / 3.24 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 183.5 %
      - Above water (accommodation/working, high = better): 52.4 %
   Waterplane Area: 2 859 Square feet or 266 Square metres
   Displacement factor (Displacement / loading): 42 %
   Structure weight / hull surface area: 24 lbs/sq ft or 117 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 3.83
      - Overall: 0.61
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped
   Ship has slow, easy roll, a good, steady gun platform

[Jefgte]

Testing BB-Atahualpa in AC version
The turrets are AB-XY, no superfiring (back to back disposition)


20000T-4T2x340, Peru AC laid down 1918 (Engine 1916)

Displacement:
   20 000 t light; 21 057 t standard; 22 267 t normal; 23 235 t full load

Dimensions: Length overall / water x beam x draught
   721.26 ft / 716.86 ft x 78.74 ft x 25.81 ft (normal load)
   219.84 m / 218.50 m x 24.00 m  x 7.87 m

Armament:
      8 - 13.39" / 340 mm guns (4x2 guns), 1 200.00lbs / 544.31kg shells, 1918 Model
     Breech loading guns in turrets (on barbettes)
     on centreline, evenly spread
     Aft Main mounts separated by engine room
      16 - 4.72" / 120 mm guns in single mounts, 52.72lbs / 23.92kg shells, 1918 Model
     Breech loading guns in casemate mounts
     on side, evenly spread, 8 raised mounts
      4 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1918 Model
     Breech loading 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, 1918 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 10 498 lbs / 4 762 kg
   Shells per gun, main battery: 103

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   9.06" / 230 mm   518.37 ft / 158.00 m   12.73 ft / 3.88 m
   Ends:   3.15" / 80 mm   177.17 ft / 54.00 m   9.45 ft / 2.88 m
     21.33 ft / 6.50 m Unarmoured ends
     Main Belt covers 111 % of normal length

   - Torpedo Bulkhead:
      1.57" / 40 mm   518.37 ft / 158.00 m   25.66 ft / 7.82 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   9.06" / 230 mm   4.72" / 120 mm      8.66" / 220 mm
   2nd:   0.79" / 20 mm         -               -
   3rd:   0.79" / 20 mm         -               -
   4th:   0.50" / 13 mm         -               -

   - Armour deck: 2.56" / 65 mm, Conning tower: 9.06" / 230 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 68 000 shp / 50 728 Kw = 27.00 kts
   Range 7 000nm at 12.00 kts
   Bunker at max displacement = 2 178 tons

Complement:
   910 - 1 184

Cost:
   £4.313 million / $17.251 million

Distribution of weights at normal displacement:
   Armament: 1 311 tons, 5.9 %
   Armour: 6 845 tons, 30.7 %
      - Belts: 2 664 tons, 12.0 %
      - Torpedo bulkhead: 775 tons, 3.5 %
      - Armament: 1 413 tons, 6.3 %
      - Armour Deck: 1 839 tons, 8.3 %
      - Conning Tower: 154 tons, 0.7 %
   Machinery: 2 534 tons, 11.4 %
   Hull, fittings & equipment: 9 010 tons, 40.5 %
   Fuel, ammunition & stores: 2 267 tons, 10.2 %
   Miscellaneous weights: 300 tons, 1.3 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     25 596 lbs / 11 610 Kg = 21.3 x 13.4 " / 340 mm shells or 3.9 torpedoes
   Stability (Unstable if below 1.00): 1.07
   Metacentric height 4.0 ft / 1.2 m
   Roll period: 16.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 72 %
         - Recoil effect (Restricted arc if above 1.00): 0.88
   Seaboat quality  (Average = 1.00): 1.20

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.535
   Length to Beam Ratio: 9.10 : 1
   'Natural speed' for length: 26.77 kts
   Power going to wave formation at top speed: 45 %
   Trim (Max stability = 0, Max steadiness = 100): 60
   Bow angle (Positive = bow angles forward): 10.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      24.93 ft / 7.60 m
      - Forecastle (18 %):   19.69 ft / 6.00 m
      - Mid (45 %):      16.40 ft / 5.00 m
      - Quarterdeck (17 %):   16.40 ft / 5.00 m
      - Stern:      16.40 ft / 5.00 m
      - Average freeboard:   17.82 ft / 5.43 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 111.1 %
      - Above water (accommodation/working, high = better): 138.9 %
   Waterplane Area: 38 844 Square feet or 3 609 Square metres
   Displacement factor (Displacement / loading): 98 %
   Structure weight / hull surface area: 160 lbs/sq ft or 782 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.03
      - Longitudinal: 0.99
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

[RAM]

not bad, but no main battery superfiring mounts at all?

[Jefgte]

...no main battery superfiring mounts at all?

To economise the weight of the superfiring barbettes.


;)

[Guinness]

judging by the results, Jef saves around 4 or 5000 tons this way, compared to similar ships built by others. A useful savings for Peru, I'm sure.

My concern is that I'd expect an AC/BC to be much more likely to engage in a chase action than a battleship intended for line service. The loss of end-on fire in that case could be a real problem.

What Peru really needs is quadruple turrets...

[Jefgte]

judging by the results, Jef saves around 4 or 5000 tons this way, compared to similar ships built by others. A useful savings for Peru, I'm sure.

My concern is that I'd expect an AC/BC to be much more likely to engage in a chase action than a battleship intended for line service. The loss of end-on fire in that case could be a real problem.

What Peru really needs is quadruple turrets...

SS give 510t for the superfiring barbettes (armor 220mm)
That's not too much...  ;)

This AC must be use first in BS & second in chase.

I have also the possibility to use this AC in the futur 2BS with the BB Waskhar as the "Sombra de Waskhar". In this option, better armor & 25kts. Enough to engage enemy cruisers & TBs... & no chase job.

I don't like very much quad turrets. I prefer triple turrets.

;)