Cruceros de La Marina de guerra de los Naciones Unidas de Suramérica

[Sachmle]

San Martin Class, NUS Armoured Cruiser
4 Active

Displacement:
   7,006 t light; 7,275 t standard; 8,318 t normal; 9,152 t full load

Dimensions: Length overall / water x beam x draught
   325.00 ft / 325.00 ft x 58.00 ft x 26.00 ft (normal load)
   99.06 m / 99.06 m x 17.68 m  x 7.92 m

Armament:
      4 - 8.00" / 203 mm guns (2x2 guns), 250.00lbs / 113.40kg shells, 1895 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread
      6 - 6.00" / 152 mm guns in single mounts, 100.00lbs / 45.36kg shells, 1895 Model
     Breech loading guns in casemate mounts
     on side, all amidships
     6 guns in hull casemates - Limited use in all but light seas
      10 - 3.00" / 76.2 mm guns in single mounts, 12.00lbs / 5.44kg shells, 1895 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 1,720 lbs / 780 kg
   Shells per gun, main battery: 100
   4 - 18.0" / 457.2 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   8.00" / 203 mm   275.00 ft / 83.82 m   8.00 ft / 2.44 m
   Ends:   4.00" / 102 mm     50.00 ft / 15.24 m   8.00 ft / 2.44 m
   Upper:   6.00" / 152 mm   275.00 ft / 83.82 m   6.00 ft / 1.83 m
     Main Belt covers 130 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   8.00" / 203 mm   6.00" / 152 mm   8.00" / 203 mm
   2nd:   2.00" / 51 mm         -      4.00" / 102 mm
   3rd:   1.00" / 25 mm         -               -

   - Armour deck: 1.00" / 25 mm, Conning tower: 8.00" / 203 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 4 shafts, 16,272 ihp / 12,139 Kw = 20.00 kts
   Range 8,000nm at 10.00 kts
   Bunker at max displacement = 1,876 tons (100% coal)

Complement:
   435 - 566

Cost:
   £0.821 million / $3.284 million

Distribution of weights at normal displacement:
   Armament: 226 tons, 2.7 %
   Armour: 1,920 tons, 23.1 %
      - Belts: 1,199 tons, 14.4 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 396 tons, 4.8 %
      - Armour Deck: 254 tons, 3.0 %
      - Conning Tower: 71 tons, 0.9 %
   Machinery: 2,758 tons, 33.2 %
   Hull, fittings & equipment: 2,072 tons, 24.9 %
   Fuel, ammunition & stores: 1,312 tons, 15.8 %
   Miscellaneous weights: 30 tons, 0.4 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     4,431 lbs / 2,010 Kg = 17.3 x 8.0 " / 203 mm shells or 0.9 torpedoes
   Stability (Unstable if below 1.00): 1.21
   Metacentric height 3.1 ft / 1.0 m
   Roll period: 13.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 60 %
         - Recoil effect (Restricted arc if above 1.00): 0.26
   Seaboat quality  (Average = 1.00): 1.13

Hull form characteristics:
   Hull has raised forecastle, rise forward of midbreak
   Block coefficient: 0.594
   Length to Beam Ratio: 5.60 : 1
   'Natural speed' for length: 18.03 kts
   Power going to wave formation at top speed: 59 %
   Trim (Max stability = 0, Max steadiness = 100): 53
   Bow angle (Positive = bow angles forward): -14.00 degrees
   Stern overhang: -8.00 ft / -2.44 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      20.00 ft / 6.10 m
      - Forecastle (35 %):   20.00 ft / 6.10 m (19.00 ft / 5.79 m aft of break)
      - Mid (50 %):      19.00 ft / 5.79 m (10.00 ft / 3.05 m aft of break)
      - Quarterdeck (15 %):   10.00 ft / 3.05 m
      - Stern:      10.00 ft / 3.05 m
      - Average freeboard:   14.85 ft / 4.53 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 128.1 %
      - Above water (accommodation/working, high = better): 68.0 %
   Waterplane Area: 13,709 Square feet or 1,274 Square metres
   Displacement factor (Displacement / loading): 90 %
   Structure weight / hull surface area: 95 lbs/sq ft or 463 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.89
      - Longitudinal: 2.75
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped


San Luis Class, NUS Protected Cruiser
5 Active

Displacement:
   4,207 t light; 4,391 t standard; 5,223 t normal; 5,890 t full load

Dimensions: Length overall / water x beam x draught
   300.00 ft / 300.00 ft x 48.00 ft x 23.00 ft (normal load)
   91.44 m / 91.44 m x 14.63 m  x 7.01 m

Armament:
      4 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1892 Model
     Quick firing guns in deck mounts with hoists
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      6 - 4.00" / 102 mm guns (4 mounts), 32.00lbs / 14.51kg shells, 1892 Model
     Quick firing guns in deck mounts
     on side, evenly spread
      6 - 2.00" / 50.8 mm guns (4 mounts), 4.00lbs / 1.81kg shells, 1892 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
      4 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1892 Model
     Machine guns in deck mounts
     on side ends, evenly spread, all raised mounts - superfiring
   Weight of broadside 650 lbs / 295 kg
   Shells per gun, main battery: 200
   4 - 18.0" / 457.2 mm above water torpedoes, 2 - 18.0" / 457.2 mm submerged torpedo tubes

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.00" / 25 mm         -            -
   2nd:   0.50" / 13 mm         -            -
   3rd:   0.50" / 13 mm         -            -

   - Armour deck: 2.00" / 51 mm, Conning tower: 8.00" / 203 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 4 shafts, 13,260 ihp / 9,892 Kw = 20.40 kts
   Range 8,000nm at 10.00 kts
   Bunker at max displacement = 1,499 tons (100% coal)

Complement:
   306 - 399

Cost:
   £0.547 million / $2.188 million

Distribution of weights at normal displacement:
   Armament: 81 tons, 1.6 %
   Armour: 448 tons, 8.6 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 23 tons, 0.4 %
      - Armour Deck: 373 tons, 7.1 %
      - Conning Tower: 52 tons, 1.0 %
   Machinery: 2,368 tons, 45.3 %
   Hull, fittings & equipment: 1,260 tons, 24.1 %
   Fuel, ammunition & stores: 1,016 tons, 19.5 %
   Miscellaneous weights: 50 tons, 1.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1,706 lbs / 774 Kg = 15.8 x 6.0 " / 152 mm shells or 0.5 torpedoes
   Stability (Unstable if below 1.00): 1.39
   Metacentric height 2.9 ft / 0.9 m
   Roll period: 11.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 60 %
         - Recoil effect (Restricted arc if above 1.00): 0.16
   Seaboat quality  (Average = 1.00): 1.06

Hull form characteristics:
   Hull has raised forecastle
   Block coefficient: 0.552
   Length to Beam Ratio: 6.25 : 1
   'Natural speed' for length: 17.32 kts
   Power going to wave formation at top speed: 59 %
   Trim (Max stability = 0, Max steadiness = 100): 57
   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:      16.50 ft / 5.03 m
      - Forecastle (25 %):   16.50 ft / 5.03 m (10.50 ft / 3.20 m aft of break)
      - Mid (50 %):      10.50 ft / 3.20 m
      - Quarterdeck (15 %):   10.50 ft / 3.20 m
      - Stern:      10.50 ft / 3.20 m
      - Average freeboard:   12.00 ft / 3.66 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 168.4 %
      - Above water (accommodation/working, high = better): 56.6 %
   Waterplane Area: 10,068 Square feet or 935 Square metres
   Displacement factor (Displacement / loading): 89 %
   Structure weight / hull surface area: 76 lbs/sq ft or 373 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.90
      - Longitudinal: 2.43
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped

[Borys]

Ahoj!
Superfiring?  Rather ahistorical
If the San Luis class is from from 1892, you did not have the superfiring tech yet.
Side by side :)


Apart from that quite nice ships, both classes.
Both could trade some stability for some seakeeping, especially San Luis. Maybe half a foot more of freeboard?
Borys

[Sachmle]

Oops!! I am corrected as follows

San Luis, USA Protected Cruiser laid down 1892

Displacement:
   4,219 t light; 4,391 t standard; 5,223 t normal; 5,890 t full load

Dimensions: Length overall / water x beam x draught
   300.00 ft / 300.00 ft x 48.00 ft x 23.00 ft (normal load)
   91.44 m / 91.44 m x 14.63 m  x 7.01 m

Armament:
      3 - 6.00" / 152 mm guns in single mounts, 100.00lbs / 48.99kg shells, 1892 Model
     Quick firing guns in deck mounts with hoists
     on centreline, evenly spread
     Aft Main mounts separated by engine room
      6 - 4.00" / 102 mm guns (4 mounts), 30.00lbs / 14.51kg shells, 1892 Model
     Quick firing guns in deck mounts
     on side, evenly spread
      6 - 2.00" / 50.8 mm guns (4 mounts), 4.00lbs / 1.81kg shells, 1892 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
      4 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1892 Model
     Machine guns in deck mounts
     on side ends, evenly spread, all raised mounts - superfiring
   Weight of broadside 542 lbs / 246 kg
   Shells per gun, main battery: 200
   4 - 18.0" / 457.2 mm above water torpedoes, 2 - 18.0" / 457.2 mm submerged torpedo tubes

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.00" / 25 mm         -               -
   2nd:   1.00" / 25 mm         -               -
   3rd:   0.75" / 19 mm         -               -

   - Armour deck: 2.00" / 51 mm, Conning tower: 8.00" / 203 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 4 shafts, 13,529 ihp / 10,093 Kw = 20.50 kts
   Range 8,000nm at 10.00 kts
   Bunker at max displacement = 1,499 tons (100% coal)

Complement:
   306 - 399

Cost:
   £0.543 million / $2.171 million

Distribution of weights at normal displacement:
   Armament: 68 tons, 1.3 %
   Armour: 452 tons, 8.7 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 28 tons, 0.5 %
      - Armour Deck: 373 tons, 7.1 %
      - Conning Tower: 52 tons, 1.0 %
   Machinery: 2,416 tons, 46.3 %
   Hull, fittings & equipment: 1,233 tons, 23.6 %
   Fuel, ammunition & stores: 1,004 tons, 19.2 %
   Miscellaneous weights: 50 tons, 1.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1,718 lbs / 779 Kg = 15.9 x 6.0 " / 152 mm shells or 0.5 torpedoes
   Stability (Unstable if below 1.00): 1.43
   Metacentric height 3.1 ft / 0.9 m
   Roll period: 11.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 60 %
         - Recoil effect (Restricted arc if above 1.00): 0.11
   Seaboat quality  (Average = 1.00): 1.06

Hull form characteristics:
   Hull has raised forecastle
   Block coefficient: 0.552
   Length to Beam Ratio: 6.25 : 1
   'Natural speed' for length: 17.32 kts
   Power going to wave formation at top speed: 59 %
   Trim (Max stability = 0, Max steadiness = 100): 57
   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:      16.50 ft / 5.03 m
      - Forecastle (25 %):   16.50 ft / 5.03 m (10.50 ft / 3.20 m aft of break)
      - Mid (50 %):      10.50 ft / 3.20 m
      - Quarterdeck (15 %):   10.50 ft / 3.20 m
      - Stern:      10.50 ft / 3.20 m
      - Average freeboard:   12.00 ft / 3.66 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 169.4 %
      - Above water (accommodation/working, high = better): 56.6 %
   Waterplane Area: 10,068 Square feet or 935 Square metres
   Displacement factor (Displacement / loading): 89 %
   Structure weight / hull surface area: 75 lbs/sq ft or 365 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.91
      - Longitudinal: 2.40
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped

[Borys]

Ahoj!
Four guns better.
I added some more comments to my previous post after you had posted the redesign.
Borys

[Sachmle]

San Luis, USA Protected Cruiser laid down 1892

Displacement:
   4,221 t light; 4,396 t standard; 5,230 t normal; 5,897 t full load

Dimensions: Length overall / water x beam x draught
   300.00 ft / 300.00 ft x 48.00 ft x 23.00 ft (normal load)
   91.44 m / 91.44 m x 14.63 m  x 7.01 m

Armament:
      4 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1892 Model
     Quick firing guns in deck mounts with hoists
     on centreline ends, evenly spread, 1 raised mount aft
      6 - 4.00" / 102 mm guns (4 mounts), 32.00lbs / 14.51kg shells, 1892 Model
     Quick firing guns in deck mounts
     on side, evenly spread
      6 - 2.00" / 50.8 mm guns (4 mounts), 4.00lbs / 1.81kg shells, 1892 Model
     Quick firing guns in deck mounts
     on side, evenly spread, all raised mounts
      4 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1892 Model
     Machine guns in deck mounts
     on side ends, evenly spread, all raised mounts - superfiring
   Weight of broadside 650 lbs / 295 kg
   Shells per gun, main battery: 180
   4 - 18.0" / 457.2 mm above water torpedoes, 2 - 18.0" / 457.2 mm submerged torpedo tubes

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.00" / 25 mm         -               -
   2nd:   0.50" / 13 mm         -               -
   3rd:   0.50" / 13 mm         -               -

   - Armour deck: 2.00" / 51 mm, Conning tower: 8.00" / 203 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 4 shafts, 13,274 ihp / 9,902 Kw = 20.40 kts
   Range 8,000nm at 10.00 kts
   Bunker at max displacement = 1,500 tons (100% coal)

Complement:
   306 - 399

Cost:
   £0.548 million / $2.191 million

Distribution of weights at normal displacement:
   Armament: 81 tons, 1.6 %
   Armour: 448 tons, 8.6 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 23 tons, 0.4 %
      - Armour Deck: 373 tons, 7.1 %
      - Conning Tower: 52 tons, 1.0 %
   Machinery: 2,370 tons, 45.3 %
   Hull, fittings & equipment: 1,271 tons, 24.3 %
   Fuel, ammunition & stores: 1,009 tons, 19.3 %
   Miscellaneous weights: 50 tons, 1.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1,619 lbs / 734 Kg = 15.0 x 6.0 " / 152 mm shells or 0.5 torpedoes
   Stability (Unstable if below 1.00): 1.19
   Metacentric height 2.3 ft / 0.7 m
   Roll period: 13.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 83 %
         - Recoil effect (Restricted arc if above 1.00): 0.22
   Seaboat quality  (Average = 1.00): 1.04

Hull form characteristics:
   Hull has raised forecastle, low quarterdeck
   Block coefficient: 0.553
   Length to Beam Ratio: 6.25 : 1
   'Natural speed' for length: 17.32 kts
   Power going to wave formation at top speed: 59 %
   Trim (Max stability = 0, Max steadiness = 100): 80
   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:      16.00 ft / 4.88 m
      - Forecastle (25 %):   16.00 ft / 4.88 m (11.00 ft / 3.35 m aft of break)
      - Mid (50 %):      11.00 ft / 3.35 m
      - Quarterdeck (15 %):   7.00 ft / 2.13 m (11.00 ft / 3.35 m before break)
      - Stern:      7.00 ft / 2.13 m
      - Average freeboard:   11.65 ft / 3.55 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 168.2 %
      - Above water (accommodation/working, high = better): 59.3 %
   Waterplane Area: 10,075 Square feet or 936 Square metres
   Displacement factor (Displacement / loading): 89 %
   Structure weight / hull surface area: 77 lbs/sq ft or 378 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.91
      - Longitudinal: 2.41
      - Overall: 1.01
   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

One 6" bow, one amidships, one at midbreak facing aft, one on quarterdeck