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