Raiders for Peru

[Jefgte]

Testing a raider for Peru

Job:
- Intercept commerce of enemy
- Harbours & coast night bombardement
- Mines at strategic point
- ...



4800T raider, Peru Cruiser raider laid down 1909 (Engine 1910)

Displacement:
   4 800 t light; 4 989 t standard; 5 883 t normal; 6 598 t full load

Dimensions: Length overall / water x beam x draught
   498.69 ft / 498.69 ft x 52.49 ft x 17.33 ft (normal load)
   152.00 m / 152.00 m x 16.00 m  x 5.28 m

Armament:
      4 - 7.50" / 191 mm guns (2x2 guns), 210.94lbs / 95.68kg shells, 1909 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread
      6 - 4.72" / 120 mm guns in single mounts, 52.72lbs / 23.92kg shells, 1909 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, 1909 Model
     Quick firing guns in deck mounts
     on side, evenly spread, 2 raised mounts
      4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1909 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 1 214 lbs / 551 kg
   Shells per gun, main battery: 100
   8 - 21.0" / 533 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.94" / 100 mm   314.96 ft / 96.00 m   9.19 ft / 2.80 m
   Ends:   1.57" / 40 mm   114.83 ft / 35.00 m   6.56 ft / 2.00 m
     68.90 ft / 21.00 m Unarmoured ends
     Main Belt covers 97 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   3.94" / 100 mm   1.57" / 40 mm      3.15" / 80 mm
   2nd:   1.18" / 30 mm         -               -
   3rd:   0.79" / 20 mm         -               -
   4th:   0.50" / 13 mm         -               -

   - Armour deck: 0.98" / 25 mm, Conning tower: 3.15" / 80 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 3 shafts, 32 640 shp / 24 349 Kw = 27.02 kts
   Range 14 000nm at 10.00 kts
   Bunker at max displacement = 1 609 tons
               
Complement:
   335 - 436

Cost:
   £0.484 million / $1.937 million

Distribution of weights at normal displacement:
   Armament: 152 tons, 2.6 %
   Armour: 983 tons, 16.7 %
      - Belts: 521 tons, 8.9 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 135 tons, 2.3 %
      - Armour Deck: 305 tons, 5.2 %
      - Conning Tower: 22 tons, 0.4 %
   Machinery: 1 349 tons, 22.9 %
   Hull, fittings & equipment: 2 176 tons, 37.0 %
   Fuel, ammunition & stores: 1 084 tons, 18.4 %
   Miscellaneous weights: 140 tons, 2.4 %
                40 tons for mines

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     7 021 lbs / 3 185 Kg = 33.3 x 7.5 " / 191 mm shells or 1.3 torpedoes
   Stability (Unstable if below 1.00): 1.27
   Metacentric height 2.9 ft / 0.9 m
   Roll period: 12.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.31
   Seaboat quality  (Average = 1.00): 1.17

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.454
   Length to Beam Ratio: 9.50 : 1
   'Natural speed' for length: 22.33 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:      21.33 ft / 6.50 m
      - Forecastle (18 %):   14.76 ft / 4.50 m
      - Mid (30 %):      12.80 ft / 3.90 m
      - Quarterdeck (18 %):   12.80 ft / 3.90 m
      - Stern:      12.80 ft / 3.90 m
      - Average freeboard:   13.74 ft / 4.19 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 96.7 %
      - Above water (accommodation/working, high = better): 97.6 %
   Waterplane Area: 16 753 Square feet or 1 556 Square metres
   Displacement factor (Displacement / loading): 117 %
   Structure weight / hull surface area: 85 lbs/sq ft or 417 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.98
      - Longitudinal: 1.12
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is adequate
   Ship has slow, easy roll, a good, steady gun platform

[Carthaginian]

Excellent combination of speed and firepower- similar in role and speed to my Hatchitigbee, though gone about in a slightly different manner. I think that it's an excellent ship for it's intended purpose.

[Desertfox]

Not bad, is the current war is anything to go by, such a ship will be very useful. The similar (if slower) Swiss Launcestons and Honolulus had a very active and succesful career as raiders and raider hunters.

[Korpen]

4800T raider, Peru Cruiser raider laid down 1909 (Engine 1910)

Should that not be 1909 engines? As far as i know we only have 1905, 1909 and 1912 engine years.

[P3D]

I was thinking why Peru would need commerce raiders. Then I looked at Coquimbo, the Rohan/Austrian/DKB territories, NUS and Iberia in the Atlantic, and it started to become justified.

[Jefgte]

IMHO, I prefer when the enemy fleet cruisers is busy to run after raiders.
With that strategic option, the enemy fleet is lighter to attack Peru.

I prefer the war on the enemy territory, not on mine.



Jef

[Jefgte]

4800T cruiser is too heavy & expensive for Peru, I prefer a lighter version.
I reuse the 1600T GB made to escort BB & protect them from the Torpedo Boats.

Here is a Gun Boat Raider to carry the war on the enemy area:


1700T GBR, Peru Raider laid down 1907 (Engine 1909)

Displacement:
   1 700 t light; 1 766 t standard; 2 283 t normal; 2 697 t full load

Dimensions: Length overall / water x beam x draught
   452.76 ft / 452.76 ft x 47.90 ft x 9.12 ft (normal load)
   138.00 m / 138.00 m x 14.60 m  x 2.78 m

Armament:
      2 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1907 Model
     Breech loading guns in deck mounts
     on centreline, evenly spread
      4 - 3.54" / 90.0 mm guns in single mounts, 22.24lbs / 10.09kg shells, 1907 Model
     Quick firing guns in deck mounts
     on centreline, all amidships
      4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1907 Model
     Breech loading guns in deck mounts
     on side, evenly spread
   Weight of broadside 305 lbs / 138 kg
   Shells per gun, main battery: 112
   8 - 18.0" / 457 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   0.79" / 20 mm   406.82 ft / 124.00 m   6.56 ft / 2.00 m
   Ends:   Unarmoured
     Main Belt covers 138 % 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,
   Direct drive, 2 shafts, 18 673 shp / 13 930 Kw = 27.00 kts
   Range 13 200nm at 10.00 kts
   Bunker at max displacement = 931 tons

Complement:
   164 - 214

Cost:
   £0.210 million / $0.841 million

Distribution of weights at normal displacement:
   Armament: 38 tons, 1.7 %
   Armour: 95 tons, 4.1 %
      - Belts: 83 tons, 3.6 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 12 tons, 0.5 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 849 tons, 37.2 %
   Hull, fittings & equipment: 628 tons, 27.5 %
   Fuel, ammunition & stores: 584 tons, 25.6 %
   Miscellaneous weights: 90 tons, 3.9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1 384 lbs / 628 Kg = 12.8 x 6.0 " / 152 mm shells or 0.6 torpedoes
   Stability (Unstable if below 1.00): 1.81
   Metacentric height 4.3 ft / 1.3 m
   Roll period: 9.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.05
   Seaboat quality  (Average = 1.00): 1.25

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.404
   Length to Beam Ratio: 9.45 : 1
   'Natural speed' for length: 21.28 kts
   Power going to wave formation at top speed: 48 %
   Trim (Max stability = 0, Max steadiness = 100): 56
   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:      19.69 ft / 6.00 m
      - Forecastle (18 %):   13.78 ft / 4.20 m
      - Mid (50 %):      11.81 ft / 3.60 m
      - Quarterdeck (18 %):   11.81 ft / 3.60 m
      - Stern:      11.81 ft / 3.60 m
      - Average freeboard:   12.91 ft / 3.93 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 137.3 %
      - Above water (accommodation/working, high = better): 155.5 %
   Waterplane Area: 13 381 Square feet or 1 243 Square metres
   Displacement factor (Displacement / loading): 104 %
   Structure weight / hull surface area: 34 lbs/sq ft or 168 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.56
      - Longitudinal: 0.55
      - Overall: 0.56
   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]

If the ship is built with less than 1.00 hull strength, it needs to be built to the destroyer rules - in which case it can't be more than 1,000 t light at this point.

[Jefgte]

Finaly...

3400T cruiser, Peru Cruiser Raider laid down 1907 (Engine 1909)

Displacement:
   3 400 t light; 3 510 t standard; 4 239 t normal; 4 822 t full load

Dimensions: Length overall / water x beam x draught
   498.69 ft / 498.69 ft x 52.49 ft x 13.37 ft (normal load)
   152.00 m / 152.00 m x 16.00 m  x 4.07 m

Armament:
      2 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1907 Model
     Breech loading guns in deck mounts
     on centreline, evenly spread
      6 - 3.54" / 90.0 mm guns in single mounts, 22.24lbs / 10.09kg shells, 1907 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, 1907 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 350 lbs / 159 kg
   Shells per gun, main battery: 120
   8 - 18.0" / 457 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   1.38" / 35 mm   334.65 ft / 102.00 m   8.01 ft / 2.44 m
   Ends:   Unarmoured
     Main Belt covers 103 % 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         -               -

   - Armour deck: 0.79" / 20 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 3 shafts, 26 400 shp / 19 695 Kw = 27.01 kts
   Range 13 000nm at 10.00 kts
   Bunker at max displacement = 1 311 tons

Complement:
   262 - 341

Cost:
   £0.324 million / $1.295 million

Distribution of weights at normal displacement:
   Armament: 44 tons, 1.0 %
   Armour: 406 tons, 9.6 %
      - Belts: 153 tons, 3.6 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 14 tons, 0.3 %
      - Armour Deck: 238 tons, 5.6 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 1 200 tons, 28.3 %
   Hull, fittings & equipment: 1 630 tons, 38.5 %
   Fuel, ammunition & stores: 839 tons, 19.8 %
   Miscellaneous weights: 120 tons, 2.8 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     6 155 lbs / 2 792 Kg = 57.0 x 6.0 " / 152 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.56
   Metacentric height 4.0 ft / 1.2 m
   Roll period: 11.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.05
   Seaboat quality  (Average = 1.00): 1.35

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.424
   Length to Beam Ratio: 9.50 : 1
   'Natural speed' for length: 22.33 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:      21.65 ft / 6.60 m
      - Forecastle (18 %):   15.09 ft / 4.60 m
      - Mid (40 %):      13.12 ft / 4.00 m
      - Quarterdeck (18 %):   13.12 ft / 4.00 m
      - Stern:      13.12 ft / 4.00 m
      - Average freeboard:   14.17 ft / 4.32 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 103.2 %
      - Above water (accommodation/working, high = better): 135.4 %
   Waterplane Area: 16 366 Square feet or 1 520 Square metres
   Displacement factor (Displacement / loading): 129 %
   Structure weight / hull surface area: 69 lbs/sq ft or 337 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.00
      - Longitudinal: 1.00
      - 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

[Carthaginian]

Man... anyone that gets to close here will eat some torpedoes!
Good gun armament and four twin torp mounts with reloads- an excellent 'cure what ails you' type ship!

[Jefgte]

 Here is the second ship of the class with light improvements


Tarapaca - LD 1910 - in service 1913


Tarapaca, Peru 3400T Cruiser Raider laid down 1910

Displacement:
   3 434 t light; 3 544 t standard; 4 209 t normal; 4 740 t full load

Dimensions: Length overall / water x beam x draught
   498.69 ft / 498.69 ft x 52.49 ft x 13.27 ft (normal load)
   152.00 m / 152.00 m x 16.00 m  x 4.05 m

Armament:
      2 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1910 Model
     Breech loading guns in deck mounts with hoists
     on centreline, evenly spread
      6 - 3.54" / 90.0 mm guns in single mounts, 22.24lbs / 10.09kg shells, 1910 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, 1910 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 350 lbs / 159 kg
   Shells per gun, main battery: 120
   8 - 21.0" / 533.4 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   1.38" / 35 mm   334.65 ft / 102.00 m   8.01 ft / 2.44 m
   Ends:   Unarmoured
     Main Belt covers 103 % 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         -               -

   - Armour deck: 0.79" / 20 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 3 shafts, 28 700 shp / 21 410 Kw = 27.62 kts
   Range 12 500nm at 10.00 kts
   Bunker at max displacement = 1 197 tons

Complement:
   260 - 339

Cost:
   £0.323 million / $1.292 million

Distribution of weights at normal displacement:
   Armament: 44 tons, 1.0 %
   Armour: 406 tons, 9.6 %
      - Belts: 153 tons, 3.6 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 14 tons, 0.3 %
      - Armour Deck: 238 tons, 5.7 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 1 186 tons, 28.2 %
   Hull, fittings & equipment: 1 688 tons, 40.1 %
   Fuel, ammunition & stores: 775 tons, 18.4 %
   Miscellaneous weights: 110 tons, 2.6 %
                    25 Tons for rangefinders
                    60 mines
                    15 tons for observation baloon
                    20 tons for normal reserves for very long cruise
                    + 100 tons overloaded for extra reserves very long cruise



Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     6 057 lbs / 2 747 Kg = 56.1 x 6.0 " / 152 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.47
   Metacentric height 3.7 ft / 1.1 m
   Roll period: 11.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.08
   Seaboat quality  (Average = 1.00): 1.27

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.424
   Length to Beam Ratio: 9.50 : 1
   'Natural speed' for length: 22.33 kts
   Power going to wave formation at top speed: 49 %
   Trim (Max stability = 0, Max steadiness = 100): 55
   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 (18 %):   15.75 ft / 4.80 m
      - Mid (40 %):      13.12 ft / 4.00 m
      - Quarterdeck (18 %):   13.12 ft / 4.00 m
      - Stern:      13.12 ft / 4.00 m
      - Average freeboard:   14.36 ft / 4.38 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 102.6 %
      - Above water (accommodation/working, high = better): 128.5 %
   Waterplane Area: 16 366 Square feet or 1 520 Square metres
   Displacement factor (Displacement / loading): 130 %
   Structure weight / hull surface area: 71 lbs/sq ft or 348 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.99
      - Longitudinal: 1.03
      - 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

-----------------------
"100 tons overloaded for extra reserves very long cruise"

Like the Russian Fleet in 1905, I add weight overloaded for very long cruise
Just 3% of normal weight (3400t)
Top speed reduce to 1kts for the begining of the cruise.

It is certainly possible to add more but I dont know if you have the possibility to overload reasonably (3 to 5%) a Raider.



Jef  ;)

[P3D]

Engine year 1909 or 1912 ;)

[Jefgte]

engines...

Probably 1909

1912 is too late for a 1910 LD & in service in 1913.



Jef ;)

[Borys]

Ahoj!
Nice colonial aviso, as it would be called by the KKK.

Borys

[Sachmle]

Ahoj!
Nice colonial aviso, as it would be called by the KKK.

Borys

And he means his navy, not THOSE KKK.  ;D