Peru 1915-1919 program

[Jefgte]

Peru 1915-1919 program

As I wrote early, Peruvian Armada had 3 Battle Squadrons, 2 actives & 1 in maintenance

After building a new 1st Battle Squadron from 1911 to 1914, I am going to start the new 2nd Battle Squadron.

- 1 BB - 26000t – 12x340
- 2 ACs – 9000t –
- 8 DDs – 1500t –
- 2 Coastal Subs – 500t

Other work
- 2 DD Raiders 1500t
- Rebuilt 2 Cruisers Raider in Squadron Cruiser
- 2 Fleet Tenders

[Jefgte]

1500T, Peru DD laid down 1915 (Engine 1912)

Displacement:
   1 500 t light; 1 545 t standard; 1 798 t normal; 2 001 t full load

Dimensions: Length overall / water x beam x draught
   390.42 ft / 390.42 ft x 39.37 ft x 10.24 ft (normal load)
   119.00 m / 119.00 m x 12.00 m  x 3.12 m

Armament:
      2 - 3.54" / 90.0 mm guns in single mounts, 22.24lbs / 10.09kg shells, 1915 Model
     Quick firing guns in deck mounts
     on centreline ends, evenly spread
      2 - 3.54" / 90.0 mm guns in single mounts, 22.24lbs / 10.09kg shells, 1915 Model
     Quick firing guns in deck mounts
     on centreline, all amidships
      2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1915 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 89 lbs / 40 kg
   Shells per gun, main battery: 150
   6 - 21.0" / 533 mm above water torpedoes

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

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 30 000 shp / 22 380 Kw = 31.22 kts
   Range 6 000nm at 12.00 kts
   Bunker at max displacement = 456 tons

Complement:
   137 - 179

Cost:
   £0.285 million / $1.141 million

Distribution of weights at normal displacement:
   Armament: 11 tons, 0.6 %
   Armour: 6 tons, 0.3 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 6 tons, 0.3 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 959 tons, 53.4 %
   Hull, fittings & equipment: 474 tons, 26.4 %
   Fuel, ammunition & stores: 298 tons, 16.6 %
   Miscellaneous weights: 50 tons, 2.8 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     574 lbs / 260 Kg = 25.8 x 3.5 " / 90 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.59
   Metacentric height 2.7 ft / 0.8 m
   Roll period: 10.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 72 %
         - Recoil effect (Restricted arc if above 1.00): 0.04
   Seaboat quality  (Average = 1.00): 1.17

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.400
   Length to Beam Ratio: 9.92 : 1
   'Natural speed' for length: 19.76 kts
   Power going to wave formation at top speed: 60 %
   Trim (Max stability = 0, Max steadiness = 100): 62
   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:      21.00 ft / 6.40 m
      - Forecastle (19 %):   17.06 ft / 5.20 m
      - Mid (40 %):      16.40 ft / 5.00 m (12.47 ft / 3.80 m aft of break)
      - Quarterdeck (18 %):   12.47 ft / 3.80 m
      - Stern:      12.47 ft / 3.80 m
      - Average freeboard:   14.53 ft / 4.43 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 180.1 %
      - Above water (accommodation/working, high = better): 133.6 %
   Waterplane Area: 9 462 Square feet or 879 Square metres
   Displacement factor (Displacement / loading): 71 %
   Structure weight / hull surface area: 30 lbs/sq ft or 148 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.02
      - Overall: 0.53
   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

Robore - 1915
Riberalta - 1915
Chimbote-1916
Puerto Suarez - 1916
Sorata - 1917
Coroico - 1917
Aiquile - 1918
Arica - 1918

[Jefgte]

1915-1919 program is a too short period to built a 2nd battle Squadron
I increase by 1 year
1915 to 1920
The result is now a 2nd Battle Squadron with:

- 1 BB - 26000t – ld 1915 - 12x340
- 1 CB - 18000t - ld 1919
- 1 AC – 9000t - ld 1917
- 1 CP - 3000t - ld 1918
- 8 DDs – 1500t – ld 1915-16-17-18-19
- 2 Coastal Subs – 500t - ld-1918

Other work
- 2 DD Raiders 1500t - ld1920
- Rebuilt 2 Cruisers Raider (Tarapaca & Amazonas) in Squadron Cruiser
- 2 Fleet Tenders

[Jefgte]

Testing the 1919 BC

18000T-3T2x340-AQY-29.2kts, Peru BC laid down 1919 (Engine 1916)

Displacement:
   18 000 t light; 18 850 t standard; 19 986 t normal; 20 895 t full load

Dimensions: Length overall / water x beam x draught
   718.50 ft / 718.50 ft x 75.46 ft x 24.58 ft (normal load)
   219.00 m / 219.00 m x 23.00 m  x 7.49 m

Armament:
      6 - 13.39" / 340 mm guns (3x2 guns), 1 199.24lbs / 543.97kg shells, 1919 Model
     Breech loading guns in turrets (on barbettes)
     on centreline, evenly spread
     Aft Main mounts separated by engine room
      12 - 4.72" / 120 mm guns in single mounts, 52.72lbs / 23.91kg shells, 1919 Model
     Breech loading guns in casemate mounts
     on centreline, all amidships
      8 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1919 Model
     Breech loading guns in casemate mounts
     on side, evenly spread, all raised mounts
      4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1919 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 7 936 lbs / 3 600 kg
   Shells per gun, main battery: 100
   4 - 18.0" / 457.2 mm submerged torpedo tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   9.45" / 240 mm   439.63 ft / 134.00 m   12.73 ft / 3.88 m
   Ends:   3.15" / 80 mm   246.06 ft / 75.00 m   10.17 ft / 3.10 m
     32.81 ft / 10.00 m Unarmoured ends
     Main Belt covers 94 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   11.0" / 280 mm   3.15" / 80 mm      9.45" / 240 mm
   2nd:   1.57" / 40 mm         -               -
   3rd:   0.79" / 20 mm         -               -
   4th:   0.50" / 13 mm         -               -

   - Armour deck: 1.97" / 50 mm, Conning tower: 11.02" / 280 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 86 000 shp / 64 156 Kw = 29.27 kts
   Range 7 000nm at 12.00 kts
   Bunker at max displacement = 2 045 tons

Complement:
   839 - 1 092

Cost:
   £4.171 million / $16.686 million

Distribution of weights at normal displacement:
   Armament: 992 tons, 5.0 %
   Armour: 5 233 tons, 26.2 %
      - Belts: 2 526 tons, 12.6 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 1 186 tons, 5.9 %
      - Armour Deck: 1 346 tons, 6.7 %
      - Conning Tower: 175 tons, 0.9 %
   Machinery: 3 204 tons, 16.0 %
   Hull, fittings & equipment: 8 190 tons, 41.0 %
   Fuel, ammunition & stores: 1 986 tons, 9.9 %
   Miscellaneous weights: 380 tons, 1.9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     21 987 lbs / 9 973 Kg = 18.3 x 13.4 " / 340 mm shells or 2.2 torpedoes
   Stability (Unstable if below 1.00): 1.07
   Metacentric height 3.8 ft / 1.1 m
   Roll period: 16.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.84
   Seaboat quality  (Average = 1.00): 1.20

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.525
   Length to Beam Ratio: 9.52 : 1
   'Natural speed' for length: 26.80 kts
   Power going to wave formation at top speed: 48 %
   Trim (Max stability = 0, Max steadiness = 100): 58
   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:      24.93 ft / 7.60 m
      - Forecastle (18 %):   21.65 ft / 6.60 m
      - Mid (40 %):      18.37 ft / 5.60 m
      - Quarterdeck (18 %):   18.37 ft / 5.60 m
      - Stern:      18.37 ft / 5.60 m
      - Average freeboard:   19.56 ft / 5.96 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): 158.9 %
   Waterplane Area: 36 965 Square feet or 3 434 Square metres
   Displacement factor (Displacement / loading): 100 %
   Structure weight / hull surface area: 148 lbs/sq ft or 725 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.99
      - Longitudinal: 1.06
      - 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]

In 1915, 8 Rio Nevati class gun boats are going to be slightly rebuilt with minesweeping material.
The aft 90mm guns is remove, & minesweeping material installed in place.

http://www.navalism.org/index.php?topic=2202.0

8x90mm guns are free.

1st possibility:
8x90 installed on a new Scout Cruiser.

The job of this Cruiser is to screen the battle squadron & engage enemy Torpedo Boats & specialy protect the Battleships.

4000T, Peru Scout cruiser laid down 1915

Displacement:
   4 000 t light; 4 158 t standard; 4 665 t normal; 5 070 t full load

Dimensions: Length overall / water x beam x draught
   528.98 ft / 524.93 ft x 52.49 ft x 13.65 ft (normal load)
   161.23 m / 160.00 m x 16.00 m  x 4.16 m

Armament:
      2 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1915 Model
     Breech loading guns in deck mounts with hoists
     on centreline, evenly spread
     Aft Main mounts separated by engine room
      2 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1915 Model
     Breech loading guns in casemate mounts
     on side, all amidships
      8 - 3.54" / 90.0 mm guns in single mounts, 22.24lbs / 10.09kg shells, 1915 Model
     Quick firing guns in casemate mounts
     on side, evenly spread
      4 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1915 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, 1915 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 664 lbs / 301 kg
   Shells per gun, main battery: 150
   12 - 18.0" / 457.2 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   1.57" / 40 mm   433.07 ft / 132.00 m   8.01 ft / 2.44 m
   Ends:   Unarmoured
     Main Belt covers 127 % of normal length

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

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 42 000 shp / 31 332 Kw = 30.09 kts
   Range 7 500nm at 12.00 kts
   Bunker at max displacement = 912 tons

Complement:
   281 - 366

Cost:
   £0.629 million / $2.516 million

Distribution of weights at normal displacement:
   Armament: 83 tons, 1.8 %
   Armour: 238 tons, 5.1 %
      - Belts: 218 tons, 4.7 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 19 tons, 0.4 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 1 591 tons, 34.1 %
   Hull, fittings & equipment: 1 989 tons, 42.6 %
   Fuel, ammunition & stores: 664 tons, 14.2 %
   Miscellaneous weights: 100 tons, 2.1 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     4 452 lbs / 2 019 Kg = 41.2 x 6.0 " / 152 mm shells or 0.9 torpedoes
   Stability (Unstable if below 1.00): 1.37
   Metacentric height 3.3 ft / 1.0 m
   Roll period: 12.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 72 %
         - Recoil effect (Restricted arc if above 1.00): 0.15
   Seaboat quality  (Average = 1.00): 1.20

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.434
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 22.91 kts
   Power going to wave formation at top speed: 52 %
   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:      22.97 ft / 7.00 m
      - Forecastle (18 %):   18.37 ft / 5.60 m
      - Mid (50 %):      14.44 ft / 4.40 m
      - Quarterdeck (18 %):   14.44 ft / 4.40 m
      - Stern:      14.44 ft / 4.40 m
      - Average freeboard:   16.10 ft / 4.91 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 126.8 %
      - Above water (accommodation/working, high = better): 141.4 %
   Waterplane Area: 17 356 Square feet or 1 612 Square metres
   Displacement factor (Displacement / loading): 111 %
   Structure weight / hull surface area: 76 lbs/sq ft or 372 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.98
      - Longitudinal: 1.12
      - 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
-------------------
2nd possibility:
built 2x1000t TB with 4x90 on each
& built 2 other 1000t TB

1000T, Peru DD1915 laid down 1912

Displacement:
   1 000 t light; 1 033 t standard; 1 186 t normal; 1 308 t full load

Dimensions: Length overall / water x beam x draught
   318.24 ft / 318.24 ft x 34.12 ft x 9.55 ft (normal load)
   97.00 m / 97.00 m x 10.40 m  x 2.91 m

Armament:
      2 - 3.54" / 90.0 mm guns in single mounts, 22.24lbs / 10.09kg shells, 1912 Model
     Breech loading guns in deck mounts
     on centreline, evenly spread
      2 - 3.54" / 90.0 mm guns in single mounts, 22.24lbs / 10.09kg shells, 1912 Model
     Breech loading guns in deck mounts
     on side, evenly spread
      1 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1912 Model
     Quick firing gun in deck mount
     on side
      2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1912 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 103 lbs / 47 kg
   Shells per gun, main battery: 140
   6 - 18.0" / 457 mm above water torpedoes

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.79" / 20 mm         -               -
   2nd:   0.79" / 20 mm         -               -
   3rd:   0.79" / 20 mm         -               -
   4th:   0.50" / 13 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 19 749 shp / 14 733 Kw = 29.28 kts
   Range 7 000nm at 10.00 kts
   Bunker at max displacement = 275 tons

Complement:
   100 - 131

Cost:
   £0.127 million / $0.509 million

Distribution of weights at normal displacement:
   Armament: 13 tons, 1.1 %
   Armour: 7 tons, 0.6 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 7 tons, 0.6 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 581 tons, 49.0 %
   Hull, fittings & equipment: 318 tons, 26.9 %
   Fuel, ammunition & stores: 186 tons, 15.7 %
   Miscellaneous weights: 80 tons, 6.7 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     386 lbs / 175 Kg = 17.4 x 3.5 " / 90 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.40
   Metacentric height 1.8 ft / 0.5 m
   Roll period: 10.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.08
   Seaboat quality  (Average = 1.00): 1.10

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.400
   Length to Beam Ratio: 9.33 : 1
   'Natural speed' for length: 17.84 kts
   Power going to wave formation at top speed: 63 %
   Trim (Max stability = 0, Max steadiness = 100): 64
   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:      19.03 ft / 5.80 m
      - Forecastle (18 %):   14.44 ft / 4.40 m
      - Mid (50 %):      11.81 ft / 3.60 m
      - Quarterdeck (18 %):   11.81 ft / 3.60 m
      - Stern:      11.15 ft / 3.40 m
      - Average freeboard:   12.98 ft / 3.95 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 174.0 %
      - Above water (accommodation/working, high = better): 114.4 %
   Waterplane Area: 6 684 Square feet or 621 Square metres
   Displacement factor (Displacement / loading): 67 %
   Structure weight / hull surface area: 28 lbs/sq ft or 136 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.34
      - Overall: 0.55
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is adequate
   Ship has slow, easy roll, a good, steady gun platform
---------------------------------
What did you choose ?

[The Rock Doctor]

I think the destroyer is the better bet of the two, but to be honest, I'd use those guns for auxiliaries and shore batteries - both cruisers and destroyers ought to carry heavier guns than 90mm at this point.

[Walter]

I always thought that the main weapon of the Torpedo Boat is the torpedo, not the guns. This is why my Torpedo Boats under construction have a few 3" guns.

[The Rock Doctor]

Fair enough - I was looking at the...

Peru DD1915

...part, rather than the TB references.

[Jefgte]

4300T, Peru cruiser minelayer laid down 1915 (Engine 1912)

Displacement:
   4 300 t light; 4 441 t standard; 5 258 t normal; 5 911 t full load

Dimensions: Length overall / water x beam x draught
   551.18 ft / 551.18 ft x 58.01 ft x 14.04 ft (normal load)
   168.00 m / 168.00 m x 17.68 m  x 4.28 m

Armament:
      2 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1915 Model
     Breech loading guns in deck mounts with hoists
     on centreline, evenly spread
      4 - 4.72" / 120 mm guns in single mounts, 52.72lbs / 23.92kg shells, 1915 Model
     Breech loading guns in deck mounts
     on centreline, all amidships
      2 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1915 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, 1915 Model
     Quick firing guns in deck mounts
     on side, evenly spread
   Weight of broadside 454 lbs / 206 kg
   Shells per gun, main battery: 125
   6 - 18.0" / 457.2 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   1.18" / 30 mm   413.39 ft / 126.00 m   8.01 ft / 2.44 m
   Ends:   Unarmoured
     Main Belt covers 115 % of normal length

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

   - Conning tower: 0.79" / 20 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 41 000 shp / 30 586 Kw = 29.52 kts
   Range 10 000nm at 12.00 kts
                2780nm at 21kts
                1164nm at 29kts
   Bunker at max displacement = 1 470 tons

Complement:
   308 - 401

Cost:
   £0.621 million / $2.485 million

Distribution of weights at normal displacement:
   Armament: 57 tons, 1.1 %
   Armour: 181 tons, 3.4 %
      - Belts: 159 tons, 3.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 17 tons, 0.3 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 5 tons, 0.1 %
   Machinery: 1 635 tons, 31.1 %
   Hull, fittings & equipment: 2 208 tons, 42.0 %
   Fuel, ammunition & stores: 957 tons, 18.2 %
   Miscellaneous weights: 220 tons, 4.2 %
                100 Tons for high rangefinders
                100 mines
                15 tons for 2 observation baloons (warm air) - cable 300m
                100 tons overloaded for extra reserves very long cruise

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     6 223 lbs / 2 823 Kg = 57.6 x 6.0 " / 152 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.44
   Metacentric height 4.1 ft / 1.3 m
   Roll period: 12.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 73 %
         - Recoil effect (Restricted arc if above 1.00): 0.07
   Seaboat quality  (Average = 1.00): 1.21

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.410
   Length to Beam Ratio: 9.50 : 1
   'Natural speed' for length: 23.48 kts
   Power going to wave formation at top speed: 50 %
   Trim (Max stability = 0, Max steadiness = 100): 60
   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:      21.65 ft / 6.60 m
      - Forecastle (19 %):   17.06 ft / 5.20 m
      - Mid (50 %):      13.78 ft / 4.20 m
      - Quarterdeck (19 %):   13.78 ft / 4.20 m
      - Stern:      13.78 ft / 4.20 m
      - Average freeboard:   15.26 ft / 4.65 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 113.9 %
      - Above water (accommodation/working, high = better): 161.8 %
   Waterplane Area: 19 799 Square feet or 1 839 Square metres
   Displacement factor (Displacement / loading): 127 %
   Structure weight / hull surface area: 79 lbs/sq ft or 384 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.00
      - 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

[The Rock Doctor]

It looks alright - but do you need an large, offensive mine-laying capability where you are?

[Jefgte]

..or is it intox ?

The war is better on adversary water...

:D

[The Rock Doctor]

True.

On second reading, I'd suggest leaving out the 30mm belt - it won't stop cruiser fire, so use the weight to increase speed and/or mine load.

[Jefgte]

I increase slightly the speed, now over 30kts & also armament.
now, 4x2 with 2x152mm centerline alternate


Scout Cruiser, Peru 4300T laid down 1915 (Engine 1912)

Displacement:
   4 300 t light; 4 483 t standard; 5 091 t normal; 5 577 t full load

Dimensions: Length overall / water x beam x draught
   551.18 ft / 551.18 ft x 52.49 ft x 14.88 ft (normal load)
   168.00 m / 168.00 m x 16.00 m  x 4.53 m

Armament:
      4 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1915 Model
     Breech loading guns in deck mounts with hoists
     on centreline, evenly spread
     Aft Main mounts separated by engine room
      4 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1915 Model
     Breech loading guns in deck mounts with hoists
     on centreline, all amidships
      2 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1915 Model
     Quick firing guns in deck mounts
     on side, evenly spread
      4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1915 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 891 lbs / 404 kg
   Shells per gun, main battery: 150
   6 - 18.0" / 457.2 mm above water torpedoes

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.79" / 20 mm         -               -
   2nd:   0.79" / 20 mm         -               -
   3rd:   0.79" / 20 mm         -               -
   4th:   0.50" / 13 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 4 shafts, 43 400 shp / 32 377 Kw = 30.20 kts
   Range 7 500nm at 12.00 kts
                2 100nm at 21kts
                800nm at 30kts
   Bunker at max displacement = 1 094 tons

Complement:
   300 - 391

Cost:
   £0.707 million / $2.830 million

Distribution of weights at normal displacement:
   Armament: 111 tons, 2.2 %
   Armour: 25 tons, 0.5 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 25 tons, 0.5 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 1 730 tons, 34.0 %
   Hull, fittings & equipment: 2 253 tons, 44.3 %
   Fuel, ammunition & stores: 791 tons, 15.5 %
   Miscellaneous weights: 180 tons, 3.5 %
               100 Tons for high rangefinders
                60mines
                15 tons for 2 observation baloons (warm air) - cable 300m
                5 tons reserves
                150 tons overloaded for extra reserves very long cruise - max speed 28kts


Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     4 165 lbs / 1 889 Kg = 38.6 x 6.0 " / 152 mm shells or 0.9 torpedoes
   Stability (Unstable if below 1.00): 1.32
   Metacentric height 3.1 ft / 0.9 m
   Roll period: 12.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 72 %
         - Recoil effect (Restricted arc if above 1.00): 0.28
   Seaboat quality  (Average = 1.00): 1.21

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.414
   Length to Beam Ratio: 10.50 : 1
   'Natural speed' for length: 23.48 kts
   Power going to wave formation at top speed: 50 %
   Trim (Max stability = 0, Max steadiness = 100): 60
   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:      22.31 ft / 6.80 m
      - Forecastle (19 %):   17.06 ft / 5.20 m
      - Mid (40 %):      13.78 ft / 4.20 m
      - Quarterdeck (18 %):   13.78 ft / 4.20 m
      - Stern:      13.78 ft / 4.20 m
      - Average freeboard:   15.15 ft / 4.62 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 131.0 %
      - Above water (accommodation/working, high = better): 146.3 %
   Waterplane Area: 17 965 Square feet or 1 669 Square metres
   Displacement factor (Displacement / loading): 112 %
   Structure weight / hull surface area: 83 lbs/sq ft or 407 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.00
      - Longitudinal: 1.04
      - 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

[Guinness]

Is there room for 8 6" guns all on the centerline in single mounts on 551 feet? I'd have to draw it to see, but I had trouble finding room for 6 5.5" guns on my recent 4000t cruiser.

We need the NEDS expert in here. Paging Borys! Borys to the white courtesy phone please.

[The Rock Doctor]

I would postulate that Borys would, after careful analysis, agree that this was a case of NEDS.

However, I'm wondering if Jef meant to have those as four twin mounts.