1st class BB, main fleet
QuoteH-09 Scheme 2A2, Battleship laid down 1870
Displacement:
4,500 t light; 4,742 t standard; 4,994 t normal; 5,195 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(280.00 ft / 275.00 ft) x 52.00 ft x (21.00 / 21.70 ft)
(85.34 m / 83.82 m) x 15.85 m x (6.40 / 6.61 m)
Armament:
4 - 12.00" / 305 mm 15.0 cal guns - 699.99lbs / 317.51kg shells, 80 per gun
Muzzle loading guns in Coles/Ericsson turret mounts, 1870 Model
2 x Twin mounts on centreline ends, evenly spread
4 - 6.00" / 152 mm 18.0 cal guns - 80.01lbs / 36.29kg shells, 100 per gun
Muzzle loading guns in casemate mounts, 1870 Model
4 x Single mounts on sides, evenly spread
Weight of broadside 3,120 lbs / 1,415 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 12.0" / 305 mm 140.00 ft / 42.67 m 6.50 ft / 1.98 m
Ends: Unarmoured
Upper: 6.00" / 152 mm 140.00 ft / 42.67 m 3.00 ft / 0.91 m
Main Belt covers 78 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.00" / 127 mm 2.00" / 51 mm -
2nd: 1.00" / 25 mm - -
- Armoured deck - single deck:
For and Aft decks: 2.00" / 51 mm
Forecastle: 2.00" / 51 mm Quarter deck: 2.00" / 51 mm
- Conning towers: Forward 6.56" / 167 mm, Aft 0.00" / 0 mm
Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 1 shaft, 3,714 ihp / 2,771 Kw = 14.00 kts
Range 2,500nm at 7.00 kts
Bunker at max displacement = 453 tons (100% coal)
Complement:
296 - 386
Cost:
£0.371 million / $1.483 million
Distribution of weights at normal displacement:
Armament: 168 tons, 3.4 %
- Guns: 168 tons, 3.4 %
Armour: 1,195 tons, 23.9 %
- Belts: 647 tons, 12.9 %
- Armament: 133 tons, 2.7 %
- Armour Deck: 374 tons, 7.5 %
- Conning Tower: 41 tons, 0.8 %
Machinery: 910 tons, 18.2 %
Hull, fittings & equipment: 1,977 tons, 39.6 %
Fuel, ammunition & stores: 494 tons, 9.9 %
Miscellaneous weights: 250 tons, 5.0 %
- Above deck: 250 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
3,378 lbs / 1,532 Kg = 5.6 x 12.0 " / 305 mm shells or 1.3 torpedoes
Stability (Unstable if below 1.00): 1.20
Metacentric height 2.6 ft / 0.8 m
Roll period: 13.5 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.49
Seaboat quality (Average = 1.00): 1.07
Hull form characteristics:
Hull has a flush deck,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.582 / 0.586
Length to Beam Ratio: 5.29 : 1
'Natural speed' for length: 16.58 kts
Power going to wave formation at top speed: 44 %
Trim (Max stability = 0, Max steadiness = 100): 65
Bow angle (Positive = bow angles forward): -20.00 degrees
Stern overhang: -3.00 ft / -0.91 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 15.00 %, 9.00 ft / 2.74 m, 6.50 ft / 1.98 m
- Forward deck: 35.00 %, 6.50 ft / 1.98 m, 6.50 ft / 1.98 m
- Aft deck: 35.00 %, 6.50 ft / 1.98 m, 6.50 ft / 1.98 m
- Quarter deck: 15.00 %, 6.50 ft / 1.98 m, 6.50 ft / 1.98 m
- Average freeboard: 6.65 ft / 2.03 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 77.3 %
- Above water (accommodation/working, high = better): 41.9 %
Waterplane Area: 10,029 Square feet or 932 Square metres
Displacement factor (Displacement / loading): 122 %
Structure weight / hull surface area: 144 lbs/sq ft or 702 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.91
- Longitudinal: 2.31
- Overall: 1.00
Excellent machinery, storage, compartmentation space
Extremely poor accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Sail speed = 7.0 knots
Displacement = 4,994.0 tons
7 knots (5%) = 249.7 tons
2nd class BB, part of the fleet screen
QuoteH-10 Scheme 3, Scout Battleship laid down 1870
Armoured Frigate (Broadside ironclad)
Displacement:
3,000 t light; 3,472 t standard; 3,603 t normal; 3,708 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(265.10 ft / 260.00 ft) x 40.00 ft x (20.00 / 20.49 ft)
(80.80 m / 79.25 m) x 12.19 m x (6.10 / 6.25 m)
Armament:
60 - 8.00" / 203 mm 15.0 cal guns - 120.00lbs / 54.43kg shells, 100 per gun
Muzzle loading guns in broadside mounts, 1870 Model
30 x Single mounts on sides, evenly spread
30 hull mounts on upper deck- Limited use in all but light seas
30 x Single mounts on sides, evenly spread
30 hull mounts on gun deck- Limited use in any sea
Weight of broadside 7,200 lbs / 3,266 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2.55" / 65 mm 260.00 ft / 79.25 m 10.00 ft / 3.05 m
Upper: 2.55" / 65 mm 200.00 ft / 60.96 m 4.00 ft / 1.22 m
Main Belt covers 154 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm - -
- Protected deck - single deck:
For and Aft decks: 1.00" / 25 mm
Forecastle: 1.00" / 25 mm Quarter deck: 1.00" / 25 mm
Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 1 shaft, 3,061 ihp / 2,284 Kw = 14.00 kts
Range 1,500nm at 7.00 kts
Bunker at max displacement = 236 tons (100% coal)
Complement:
232 - 302
Cost:
£0.383 million / $1.532 million
Distribution of weights at normal displacement:
Armament: 481 tons, 13.3 %
- Guns: 481 tons, 13.3 %
Armour: 606 tons, 16.8 %
- Belts: 331 tons, 9.2 %
- Armament: 135 tons, 3.8 %
- Armour Deck: 140 tons, 3.9 %
Machinery: 714 tons, 19.8 %
Hull, fittings & equipment: 695 tons, 19.3 %
Fuel, ammunition & stores: 603 tons, 16.7 %
Miscellaneous weights: 504 tons, 14.0 %
- Above deck: 504 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,391 lbs / 631 Kg = 7.8 x 8.0 " / 203 mm shells or 0.6 torpedoes
Stability (Unstable if below 1.00): 1.24
Metacentric height 1.9 ft / 0.6 m
Roll period: 12.3 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.16
Seaboat quality (Average = 1.00): 1.21
Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.606 / 0.609
Length to Beam Ratio: 6.50 : 1
'Natural speed' for length: 16.12 kts
Power going to wave formation at top speed: 44 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: -3.00 ft / -0.91 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 14.00 ft / 4.27 m, 12.00 ft / 3.66 m
- Forward deck: 30.00 %, 12.00 ft / 3.66 m, 12.00 ft / 3.66 m
- Aft deck: 30.00 %, 12.00 ft / 3.66 m, 12.00 ft / 3.66 m
- Quarter deck: 20.00 %, 12.00 ft / 3.66 m, 12.50 ft / 3.81 m
- Average freeboard: 12.21 ft / 3.72 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 117.2 %
- Above water (accommodation/working, high = better): 73.8 %
Waterplane Area: 7,492 Square feet or 696 Square metres
Displacement factor (Displacement / loading): 84 %
Structure weight / hull surface area: 83 lbs/sq ft or 408 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 2.05
- Overall: 1.00
Cramped machinery, storage, compartmentation space
Cramped accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily
Sail speed = 16.0 knots
Displacement = 3,603.0 tons
7 knots (5%) = 504.4 tons
Broadside mounts are unarmored. I'm guessing the 120 pounders are smoothbores, as the shell weight's very low for a rifled gun of that bore size. [Good thing about that is that the smoothbore's very unlikely to just explode, which can certainly happen with rifled guns at this time period.]
The amount of armor is very light, it'll be useful against shell but too light to keep off much in the way of shot.
The 2nd-class BB is based on the HMS Victoria (the same as the one in Walter's thread). The difference is a smaller battery, overall simplification, and a hull form derived from Schneekluth, Watson-Gilfillan, etc. equations.
Since Walter's design also have 1" armor over broadside mounts, I assumed that it was typical and allowed. Similar for the main belt armor.
The other main component of the Fleet screen, the cruiser division. Currently 10 ships in plan.
QuoteH-11 Scheme 1, Cruiser laid down 1870
Displacement:
1,500 t light; 1,587 t standard; 1,666 t normal; 1,729 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(213.46 ft / 210.00 ft) x 35.00 ft x (15.00 / 15.45 ft)
(65.06 m / 64.01 m) x 10.67 m x (4.57 / 4.71 m)
Armament:
2 - 8.00" / 203 mm 15.0 cal guns - 120.00lbs / 54.43kg shells, 100 per gun
Muzzle loading guns in deck mounts, 1870 Model
2 x Single mounts on sides amidships
6 - 6.00" / 152 mm 18.0 cal guns - 80.01lbs / 36.29kg shells, 150 per gun
Muzzle loading guns in deck mounts, 1870 Model
6 x Single mounts on sides, evenly spread
Weight of broadside 720 lbs / 327 kg
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm - -
2nd: 0.60" / 15 mm - -
- Protected deck - single deck:
For and Aft decks: 1.00" / 25 mm
Forecastle: 1.00" / 25 mm Quarter deck: 1.00" / 25 mm
Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 1 shaft, 3,384 ihp / 2,525 Kw = 16.00 kts
Range 1,500nm at 7.00 kts
Bunker at max displacement = 142 tons (100% coal)
Complement:
129 - 169
Cost:
£0.171 million / $0.682 million
Distribution of weights at normal displacement:
Armament: 45 tons, 2.7 %
- Guns: 45 tons, 2.7 %
Armour: 108 tons, 6.5 %
- Armament: 17 tons, 1.0 %
- Armour Deck: 91 tons, 5.4 %
Machinery: 736 tons, 44.2 %
Hull, fittings & equipment: 528 tons, 31.7 %
Fuel, ammunition & stores: 166 tons, 9.9 %
Miscellaneous weights: 83 tons, 5.0 %
- Above deck: 83 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
470 lbs / 213 Kg = 2.6 x 8.0 " / 203 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.52
Metacentric height 2.1 ft / 0.6 m
Roll period: 10.1 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.19
Seaboat quality (Average = 1.00): 1.02
Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.529 / 0.533
Length to Beam Ratio: 6.00 : 1
'Natural speed' for length: 14.49 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 49
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 9.50 ft / 2.90 m, 7.00 ft / 2.13 m
- Forward deck: 30.00 %, 7.00 ft / 2.13 m, 6.50 ft / 1.98 m
- Aft deck: 30.00 %, 6.50 ft / 1.98 m, 6.50 ft / 1.98 m
- Quarter deck: 20.00 %, 6.50 ft / 1.98 m, 6.50 ft / 1.98 m
- Average freeboard: 6.88 ft / 2.10 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 153.9 %
- Above water (accommodation/working, high = better): 47.5 %
Waterplane Area: 4,859 Square feet or 451 Square metres
Displacement factor (Displacement / loading): 84 %
Structure weight / hull surface area: 73 lbs/sq ft or 358 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.91
- Longitudinal: 2.15
- Overall: 1.00
Cramped machinery, storage, compartmentation space
Extremely poor accommodation and workspace room
Sail speed = 7.0 knots
Displacement = 1,666.0 tons
7 knots (5%) = 83.3 tons
Flagships of the fleet, they are bigger than their H-09 2A2 cousins. With this they have heavier belt, deck, and conning armor. The belt is taller and there is an end belt. The secondary is heavier as well. The ship range is doubled. Currently 2 such ships are to be built.
QuoteH-12 Scheme 2, Flagship Battleship laid down 1870
Displacement:
7,000 t light; 7,328 t standard; 7,971 t normal; 8,485 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(315.00 ft / 310.00 ft) x 60.00 ft x (23.00 / 24.28 ft)
(96.01 m / 94.49 m) x 18.29 m x (7.01 / 7.40 m)
Armament:
4 - 12.00" / 305 mm 15.0 cal guns - 699.99lbs / 317.51kg shells, 80 per gun
Muzzle loading guns in Coles/Ericsson turret mounts, 1870 Model
2 x Twin mounts on centreline ends, evenly spread
8 - 6.00" / 152 mm 18.0 cal guns - 80.01lbs / 36.29kg shells, 100 per gun
Muzzle loading guns in casemate mounts, 1870 Model
8 x Single mounts on sides, evenly spread
8 - 3.00" / 76.2 mm 15.0 cal guns - 10.00lbs / 4.54kg shells, 200 per gun
Muzzle loading guns in deck mounts, 1870 Model
8 x Single mounts on sides, evenly spread
8 raised mounts
Weight of broadside 3,520 lbs / 1,597 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 18.0" / 457 mm 130.00 ft / 39.62 m 10.00 ft / 3.05 m
Ends: 3.00" / 76 mm 180.00 ft / 54.86 m 7.00 ft / 2.13 m
Main Belt covers 65 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.00" / 127 mm 2.00" / 51 mm -
2nd: 1.00" / 25 mm - -
- Armoured deck - single deck:
For and Aft decks: 3.00" / 76 mm
Forecastle: 3.00" / 76 mm Quarter deck: 3.00" / 76 mm
- Conning towers: Forward 12.00" / 305 mm, Aft 0.00" / 0 mm
Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 1 shaft, 4,892 ihp / 3,650 Kw = 14.00 kts
Range 5,000nm at 7.00 kts
Bunker at max displacement = 1,157 tons (100% coal)
Complement:
421 - 548
Cost:
£0.506 million / $2.024 million
Distribution of weights at normal displacement:
Armament: 191 tons, 2.4 %
- Guns: 191 tons, 2.4 %
Armour: 2,387 tons, 30.0 %
- Belts: 1,356 tons, 17.0 %
- Armament: 140 tons, 1.8 %
- Armour Deck: 788 tons, 9.9 %
- Conning Tower: 103 tons, 1.3 %
Machinery: 1,199 tons, 15.0 %
Hull, fittings & equipment: 2,705 tons, 33.9 %
Fuel, ammunition & stores: 971 tons, 12.2 %
Miscellaneous weights: 518 tons, 6.5 %
- Hull above water: 119 tons
- Above deck: 399 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
6,999 lbs / 3,175 Kg = 11.6 x 12.0 " / 305 mm shells or 2.0 torpedoes
Stability (Unstable if below 1.00): 1.30
Metacentric height 3.7 ft / 1.1 m
Roll period: 13.1 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.34
Seaboat quality (Average = 1.00): 1.21
Hull form characteristics:
Hull has a flush deck,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.652 / 0.658
Length to Beam Ratio: 5.17 : 1
'Natural speed' for length: 17.61 kts
Power going to wave formation at top speed: 43 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): -20.00 degrees
Stern overhang: -3.00 ft / -0.91 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 15.00 %, 12.00 ft / 3.66 m, 8.00 ft / 2.44 m
- Forward deck: 35.00 %, 8.00 ft / 2.44 m, 8.00 ft / 2.44 m
- Aft deck: 35.00 %, 8.00 ft / 2.44 m, 8.00 ft / 2.44 m
- Quarter deck: 15.00 %, 8.00 ft / 2.44 m, 10.00 ft / 3.05 m
- Average freeboard: 8.39 ft / 2.56 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 63.5 %
- Above water (accommodation/working, high = better): 51.0 %
Waterplane Area: 14,081 Square feet or 1,308 Square metres
Displacement factor (Displacement / loading): 129 %
Structure weight / hull surface area: 143 lbs/sq ft or 700 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 1.96
- Overall: 1.00
Excellent machinery, storage, compartmentation space
Cramped accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily
Sail speed = 7.0 knots
Displacement = 7,971.0 tons
7 knots (5%) = 398.6 tons
Flagship Facilities = 119.0 tons
The high speed wing. Operates either as a fleet screen attachment or detaches to chase other ships. These ships can also perform other tasks such as commerce raiding. Currently 4 are to be built.
QuoteH-14 Scheme 1, Cruiser laid down 1870
Corvette (Unarmoured)
Displacement:
3,000 t light; 3,147 t standard; 3,353 t normal; 3,517 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(303.82 ft / 300.00 ft) x 36.00 ft x (19.00 / 19.77 ft)
(92.60 m / 91.44 m) x 10.97 m x (5.79 / 6.03 m)
Armament:
2 - 8.00" / 203 mm 15.0 cal guns - 120.00lbs / 54.43kg shells, 100 per gun
Muzzle loading guns in deck mounts, 1870 Model
2 x Single mounts on sides amidships
10 - 6.00" / 152 mm 18.0 cal guns - 80.01lbs / 36.29kg shells, 150 per gun
Muzzle loading guns in broadside mounts, 1870 Model
10 x Single mounts on sides, evenly spread
Weight of broadside 1,040 lbs / 472 kg
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm - -
- Protected deck - single deck:
For and Aft decks: 1.00" / 25 mm
Forecastle: 1.00" / 25 mm Quarter deck: 1.00" / 25 mm
Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 1 shaft, 7,145 ihp / 5,330 Kw = 18.00 kts
Range 2,500nm at 7.00 kts
Bunker at max displacement = 370 tons (100% coal)
Complement:
219 - 286
Cost:
£0.357 million / $1.429 million
Distribution of weights at normal displacement:
Armament: 60 tons, 1.8 %
- Guns: 60 tons, 1.8 %
Armour: 146 tons, 4.4 %
- Armament: 7 tons, 0.2 %
- Armour Deck: 140 tons, 4.2 %
Machinery: 1,650 tons, 49.2 %
Hull, fittings & equipment: 977 tons, 29.1 %
Fuel, ammunition & stores: 353 tons, 10.5 %
Miscellaneous weights: 168 tons, 5.0 %
- Above deck: 168 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
649 lbs / 295 Kg = 3.6 x 8.0 " / 203 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 1.4 ft / 0.4 m
Roll period: 12.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.33
Seaboat quality (Average = 1.00): 1.01
Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.572 / 0.577
Length to Beam Ratio: 8.33 : 1
'Natural speed' for length: 17.32 kts
Power going to wave formation at top speed: 48 %
Trim (Max stability = 0, Max steadiness = 100): 69
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 10.50 ft / 3.20 m, 7.00 ft / 2.13 m
- Forward deck: 30.00 %, 7.00 ft / 2.13 m, 7.00 ft / 2.13 m
- Aft deck: 30.00 %, 7.00 ft / 2.13 m, 7.00 ft / 2.13 m
- Quarter deck: 20.00 %, 7.00 ft / 2.13 m, 8.00 ft / 2.44 m
- Average freeboard: 7.38 ft / 2.25 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 166.8 %
- Above water (accommodation/working, high = better): 45.6 %
Waterplane Area: 7,490 Square feet or 696 Square metres
Displacement factor (Displacement / loading): 83 %
Structure weight / hull surface area: 82 lbs/sq ft or 398 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.96
- Longitudinal: 1.39
- Overall: 1.00
Cramped machinery, storage, compartmentation space
Extremely poor accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Sail speed = 7.0 knots
Displacement = 3,353.0 tons
7 knots (5%) = 167.7 tons
The current 1870 plan.
48 ships - 119,000t
| Type | Tech | Name | | Δ | # | Total Δ | | CB | Lpp | Armament | | Vtop | FN | Vcru | Range | Armor |
| BB-1 | 1870 | H-12 1 | | 7,000 | 2 | 14,000 | | 0.664 | 310.00 | 4x12" + 8x6" + 8x3" | | 14.0 | 0.235 | 7.0 | 5,000 | B18-3-D3 |
| BB-1 | 1870 | H-09 2A2 | | 4,500 | 8 | 36,000 | | 0.582 | 280.00 | 4x12" + 4x6" | | 14.0 | 0.247 | 7.0 | 2,500 | B12-6-D2 |
| BB-2 | 1870 | H-10 3 | | 3,000 | 4 | 12,000 | | 0.606 | 260.00 | 20x8" | | 16.0 | 0.293 | 7.0 | 2,500 | B2.55-D1 |
| CL-1 | 1870 | H-11 1 | | 1,500 | 30 | 45,000 | | 0.529 | 210.00 | 2x8" + 6x6" | | 16.0 | 0.326 | 7.0 | 2,500 | D1 |
| CL-1 | 1870 | H-14 1 | | 3,000 | 4 | 12,000 | | 0.572 | 300.00 | 2x8" + 10x6" | | 18.0 | 0.307 | 7.0 | 2,500 | D1 |
Quote30 hull mounts on upper deck- Limited use in all but light seas
...
30 hull mounts on gun deck- Limited use in any sea
That might be a bit of a problem with the guns, especially the lower ones.
QuoteI'm guessing the 120 pounders are smoothbores, as the shell weight's very low for a rifled gun of that bore size.
I can't remember where I got that figure from, but I used it in the initial sim where I used 1855 as date and when the shell weights are a lot lower. When the decision was made to use 1870 as year for our pre-1870 ships, I kept on using that weight. Should be noted that the caliber of the (smoothbore) 68-pounder is given as 8.12" on wiki while I simmed it at 6.3" to avoid SS from whining about the shell weight being too light.
QuoteThe 2nd-class BB is based on the HMS Victoria
... not exactly sure which aspects it is based on...
QuoteSince Walter's design also have 1" armor over broadside mounts, I assumed that it was typical and allowed. Similar for the main belt armor.
I consider the main and upper belt to be the main protection of the guns. The broadside mount is some extra plate proctection around the gun ports. SS is not whining so I would assume that it is allowed and was it typical? Don't know.
As for the armored belt, HMS Victoria did not have any armor plating on her, so even if the 2.25" is inadequate (2.55" in Logi's design), it would be better than the historical ship. I have messed around a bit more with the design since posting it and made it slightly thicker.
Quote from: Walter on August 07, 2013, 03:33:17 AM
I can't remember where I got that figure from, but I used it in the initial sim where I used 1855 as date and when the shell weights are a lot lower. When the decision was made to use 1870 as year for our pre-1870 ships, I kept on using that weight. Should be noted that the caliber of the (smoothbore) 68-pounder is given as 8.12" on wiki while I simmed it at 6.3" to avoid SS from whining about the shell weight being too light.
I encountered that problem earlier as well: 9" Dahlgren smoothbores fire a 90 pound shot or a 75 pound shell, both of which SS complains about. Thinking about it, we should probably let it complain, a 6." gun is going to be too light to simulate a 8.12" gun. Leave the complaint SS puts in the file alone and just note that the guns are smoothbores.
Quote
I consider the main and upper belt to be the main protection of the guns. The broadside mount is some extra plate proctection around the gun ports. SS is not whining so I would assume that it is allowed and was it typical? Don't know.
As for the armored belt, HMS Victoria did not have any armor plating on her, so even if the 2.25" is inadequate (2.55" in Logi's design), it would be better than the historical ship. I have messed around a bit more with the design since posting it and made it slightly thicker.
Historically, guns in broadside mounts were not fitted with shields, probably because they have to recoil and the shields would make that even more dangerous to the crew (note that field guns didn't get shields until they stopped recoiling as well). Also, guns on the battery decks are protected (to a degree) by the hull, and guns on the main deck are given some cover by the bulwarks.
QuoteI encountered that problem earlier as well: 9" Dahlgren smoothbores fire a 90 pound shot or a 75 pound shell, both of which SS complains about. Thinking about it, we should probably let it complain, a 6." gun is going to be too light to simulate a 8.12" gun. Leave the complaint SS puts in the file alone and just note that the guns are smoothbores.
Had the same with simming a few USN monitors. Those Dahlgren weights really make SS cry. :)
I guess I will apply that. Probably be best to also add that those guns are supposed to be like the historical Dahlgren guns.
QuoteHistorically, guns in broadside mounts were not fitted with shields, probably because they have to recoil and the shields would make that even more dangerous to the crew (note that field guns didn't get shields until they stopped recoiling as well). Also, guns on the battery decks are protected (to a degree) by the hull, and guns on the main deck are given some cover by the bulwarks.
Like I said, I consider it to be armor around the gunport, not on the gun itself. It's not only the crew's safety, but also the additional weight moving around the ship when the guns fire. Looking at SS, one Vittoria broadside would mean an additional 120 tons or so moving around in the ship if the armor was fitted to the guns.
Playing around with the sim a bit, I'm not so sure about the armor on the gun. I would think that if SS thinks that it is a shield on the gun, it would eat up a lot less hullstrength. I can add that inch from the guns with ease to both the main and the upper belt armor of my sim (and the armor covers an area of 260 by 30 feet).
Quote from: Walter on August 07, 2013, 04:29:58 AM
QuoteHistorically, guns in broadside mounts were not fitted with shields, probably because they have to recoil and the shields would make that even more dangerous to the crew (note that field guns didn't get shields until they stopped recoiling as well). Also, guns on the battery decks are protected (to a degree) by the hull, and guns on the main deck are given some cover by the bulwarks.
Like I said, I consider it to be armor around the gunport, not on the gun itself. It's not only the crew's safety, but also the additional weight moving around the ship when the guns fire. Looking at SS, one Vittoria broadside would mean an additional 120 tons or so moving around in the ship if the armor was fitted to the guns.
Playing around with the sim a bit, I'm not so sure about the armor on the gun. I would think that if SS thinks that it is a shield on the gun, it would eat up a lot less hullstrength. I can add that inch from the guns with ease to both the main and the upper belt armor of my sim (and the armor covers an area of 260 by 30 feet).
<shrug> It could be that the shield it's trying to create is, if fitted to all the guns, big enough to be that inch of belt armor.
Quote from: Walter on August 07, 2013, 03:33:17 AM
QuoteThe 2nd-class BB is based on the HMS Victoria
... not exactly sure which aspects it is based on...
I mentioned the original hull scheme was based on your SS of the HMS Victoria. I later modified the hull form to bring the F
N and overall hull efficiency to where I wanted. The armament was simplified simply because I don't like to see such complex armament.
In any case, I will work on the designs and submit H-14 Scheme 2 and H-10 Scheme 4. I will take it that the consensus is to ignore SS warnings about the lightness of gun shells and remove the broadside armor.
I would also try to make the guns more useful on the H-10 design, but that is just me.
Well yes. So I've reduced it to a one-decker. The steam range has been increased to 2,500/10.
QuoteH-10 Scheme 5, Scout Battleship laid down 1870
Armoured Corvette (Broadside ironclad)
Displacement:
3,000 t light; 3,284 t standard; 3,486 t normal; 3,647 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(263.28 ft / 260.00 ft) x 42.50 ft x (19.00 / 19.73 ft)
(80.25 m / 79.25 m) x 12.95 m x (5.79 / 6.01 m)
Armament:
26 - 8.00" / 203 mm 14.8 cal guns - 174.76lbs / 79.27kg shells, 85 per gun
Muzzle loading guns in broadside mounts, 1870 Model
26 x Single mounts on sides, evenly spread
Weight of broadside 4,544 lbs / 2,061 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.00" / 76 mm 160.00 ft / 48.77 m 9.00 ft / 2.74 m
Ends: Unarmoured
Main Belt covers 95 % of normal length
- Armoured deck - single deck:
For and Aft decks: 1.00" / 25 mm
Forecastle: 1.00" / 25 mm Quarter deck: 1.00" / 25 mm
Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 1 shaft, 2,994 ihp / 2,233 Kw = 14.00 kts
Range 2,500nm at 7.00 kts
Bunker at max displacement = 363 tons (100% coal)
Complement:
226 - 294
Cost:
£0.284 million / $1.134 million
Distribution of weights at normal displacement:
Armament: 205 tons, 5.9 %
- Guns: 205 tons, 5.9 %
Armour: 336 tons, 9.6 %
- Belts: 192 tons, 5.5 %
- Armour Deck: 144 tons, 4.1 %
Machinery: 734 tons, 21.0 %
Hull, fittings & equipment: 1,238 tons, 35.5 %
Fuel, ammunition & stores: 486 tons, 13.9 %
Miscellaneous weights: 488 tons, 14.0 %
- Above deck: 488 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
2,096 lbs / 951 Kg = 11.7 x 8.0 " / 203 mm shells or 0.8 torpedoes
Stability (Unstable if below 1.00): 1.25
Metacentric height 2.1 ft / 0.6 m
Roll period: 12.4 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.69
Seaboat quality (Average = 1.00): 1.21
Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.581 / 0.586
Length to Beam Ratio: 6.12 : 1
'Natural speed' for length: 16.12 kts
Power going to wave formation at top speed: 43 %
Trim (Max stability = 0, Max steadiness = 100): 42
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: -3.00 ft / -0.91 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 9.00 ft / 2.74 m, 7.00 ft / 2.13 m
- Forward deck: 30.00 %, 7.00 ft / 2.13 m, 7.00 ft / 2.13 m
- Aft deck: 30.00 %, 7.00 ft / 2.13 m, 7.00 ft / 2.13 m
- Quarter deck: 20.00 %, 7.00 ft / 2.13 m, 7.00 ft / 2.13 m
- Average freeboard: 7.16 ft / 2.18 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 93.5 %
- Above water (accommodation/working, high = better): 45.7 %
Waterplane Area: 7,742 Square feet or 719 Square metres
Displacement factor (Displacement / loading): 116 %
Structure weight / hull surface area: 115 lbs/sq ft or 563 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.91
- Longitudinal: 2.34
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Extremely poor accommodation and workspace room
Good seaboat, rides out heavy weather easily
Sail speed = 16.0 knots
Displacement = 3,486.0 tons
7 knots ( 5%) = 174.3 tons
16 knots (14%) = 488.0 tons
*looks at freeboard*
Hmmm... perhaps replacing the guns with 2x2 12" guns in the near future during a rebuild to get something like HMS Captain. ;D
SS was being quite strange, I had it at 12' flush with a bow height of 13'. That was 1.22 seakeeping, then I dropped the bow to 12' and suddenly the seakeeping was 2.00 and the stability 0.20.
In any case, the GMT in question is 2.1'. The GZ is 0.508 at 14 degrees of heel and the Righting Moment is 1,771 foot-tons. While more than 3 times less than that of the HMS Monarch (6,500 foot-ton, 0.781 GZ), it is more than quadruple that of the HMS Captain (410 foot-ton, 0.053 GZ) which capsized.
Some other examples:
The USS Texas had a GZ of 0.614 and a righting moment of 3,880 foot-tons.
The USS Detroit (CL-10) had a GMT of 3' 7". The GZ would be 0.866 and a righting moment of 1,815 foot-tons.
The Detroit was considered stable, and in a New York Times article (1891) reporting on the Philadelphia GM issue, it states that 12" is considered safe while 14-16" are fighting qualities for the ship.
Following this, if the Detroit has a GMT 16", the GZ and righting moment are respectively 0.32256 and 675 foot-ton.
Given the GZ of the H-10 Scheme 5 is 0.508, well above the fighting quality of 0.323 and close to that of Texas's 0.614, this leads me to believe that it should fare decently. However a rebuild along your lines could be well worth it if the GZ remains safely high! :D
A rebuilt H-10, I removed 12 8" guns for 2x2 12" guns centerline. Not much else is changed. The GZ is 0.496 at 14 degrees and the right moment is 1,728 foot-ton. Not big enough change to capsize it ala HMS Captain. However, the recoil got larger than I am typically comfortable with.
A question since it's been a while since I designed a rebuilt ship - when you rebuild the ship, according to the rules does laid down date change? I know engine date doesn't change unless you are replacing the machinery.
QuoteH-10 Scheme 5 Rebuilt, Scout Battleship laid down 1870
Armoured Corvette (Broadside ironclad)
Displacement:
3,073 t light; 3,284 t standard; 3,485 t normal; 3,647 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(263.28 ft / 260.00 ft) x 42.50 ft x (19.00 / 19.73 ft)
(80.25 m / 79.25 m) x 12.95 m x (5.79 / 6.01 m)
Armament:
14 - 8.00" / 203 mm 14.8 cal guns - 174.76lbs / 79.27kg shells, 85 per gun
Muzzle loading guns in broadside mounts, 1870 Model
14 x Single mounts on sides, evenly spread
4 - 12.00" / 305 mm 15.0 cal guns - 700.00lbs / 317.51kg shells, 16 per gun
Muzzle loading guns in deck mounts, 1870 Model
2 x Twin mounts on sides amidships
Weight of broadside 5,247 lbs / 2,380 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.00" / 76 mm 160.00 ft / 48.77 m 9.00 ft / 2.74 m
Ends: Unarmoured
Main Belt covers 95 % of normal length
- Armoured deck - single deck:
For and Aft decks: 1.00" / 25 mm
Forecastle: 1.00" / 25 mm Quarter deck: 1.00" / 25 mm
Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 1 shaft, 2,993 ihp / 2,233 Kw = 14.00 kts
Range 2,500nm at 7.00 kts
Bunker at max displacement = 363 tons (100% coal)
Complement:
226 - 294
Cost:
£0.291 million / $1.164 million
Distribution of weights at normal displacement:
Armament: 195 tons, 5.6 %
- Guns: 195 tons, 5.6 %
Armour: 336 tons, 9.6 %
- Belts: 192 tons, 5.5 %
- Armour Deck: 144 tons, 4.1 %
Machinery: 734 tons, 21.0 %
Hull, fittings & equipment: 1,320 tons, 37.9 %
Fuel, ammunition & stores: 412 tons, 11.8 %
Miscellaneous weights: 488 tons, 14.0 %
- Above deck: 488 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
2,114 lbs / 959 Kg = 11.8 x 8.0 " / 203 mm shells or 0.9 torpedoes
Stability (Unstable if below 1.00): 1.24
Metacentric height 2.1 ft / 0.6 m
Roll period: 12.5 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.80
Seaboat quality (Average = 1.00): 1.20
Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.581 / 0.585
Length to Beam Ratio: 6.12 : 1
'Natural speed' for length: 16.12 kts
Power going to wave formation at top speed: 43 %
Trim (Max stability = 0, Max steadiness = 100): 42
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: -3.00 ft / -0.91 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 9.00 ft / 2.74 m, 7.00 ft / 2.13 m
- Forward deck: 30.00 %, 7.00 ft / 2.13 m, 7.00 ft / 2.13 m
- Aft deck: 30.00 %, 7.00 ft / 2.13 m, 7.00 ft / 2.13 m
- Quarter deck: 20.00 %, 7.00 ft / 2.13 m, 7.00 ft / 2.13 m
- Average freeboard: 7.16 ft / 2.18 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 92.4 %
- Above water (accommodation/working, high = better): 45.7 %
Waterplane Area: 7,741 Square feet or 719 Square metres
Displacement factor (Displacement / loading): 114 %
Structure weight / hull surface area: 121 lbs/sq ft or 591 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.90
- Longitudinal: 2.45
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Extremely poor accommodation and workspace room
Sail speed = 16.0 knots
Displacement = 3,496.0 tons
7 knots ( 5%) = 174.8 tons
16 knots (14%) = 489.4 tons
QuoteSS was being quite strange, I had it at 12' flush with a bow height of 13'. That was 1.22 seakeeping, then I dropped the bow to 12' and suddenly the seakeeping was 2.00 and the stability 0.20.
Not sure what is going on there. Perhaps you accidentally entered an additional number in one of the freeboard slots (so it reads for instance 122 feet instead of 12 feet). That is the only thing I can think of.
Throwing the numbers in SS myself, if I raise the ship's freeboard by roughly a deck (7.5 feet in order to keep hull strength at 1.00) and then lower the guns to the upper gundeck, you get "Limited use in all but light seas". Now that makes me wonder (due to lacking knowledge). Would the guns of your sim not have the same problems at that height above the water as the one with the higher freeboard and lowered guns eventhough SS does not say it?
Quote
A question since it's been a while since I designed a rebuilt ship - when you rebuild the ship, according to the rules does laid down date change? I know engine date doesn't change unless you are replacing the machinery.
I only change the engine date and only when I replace the machinery with updated engines. I would think that if you put up-to-date guns in there, you'd be changing the gun date as well (just to be safe).
Quote from: Walter on August 07, 2013, 10:10:29 AM
Throwing the numbers in SS myself, if I raise the ship's freeboard by roughly a deck (7.5 feet in order to keep hull strength at 1.00) and then lower the guns to the upper gundeck, you get "Limited use in all but light seas". Now that makes me wonder (due to lacking knowledge). Would the guns of your sim not have the same problems at that height above the water as the one with the higher freeboard and lowered guns eventhough SS does not say it?
That's an interesting question. I don't remember the exact way the SS code handles seakeeping and gun problems and I don't have as much literature on wave propagation and seakeeping as I do on hydrostatics.
According to Hogben and Lumb (1967) + Lee and Bales (1984), the distribution of significant wave heights (crest to trough) in the North Pacific is as follows:
| Sea Number | Range (m) | Mean (m) | Probability (%) | Most Probable Wave Period |
| 0-1 | 0-0.1 | 0.05 | 1.30 | - |
| 2 | 0.1-0.5 | 0.3 | 6.40 | 7.5 |
| 3 | 0.5-1.25 | 0.88 | 15.50 | 7.5 |
| 4 | 1.25-2.5 | 1.88 | 31.60 | 8.8 |
| 5 | 2.5-4 | 3.25 | 20.94 | 9.7 |
| 6 | 4-6 | 5 | 15.03 | 12.4 |
| 7 | 6-9 | 7.5 | 7.60 | 15.0 |
| 8 | 9-14 | 11.5 | 1.56 | 16.4 |
| >8 | >14 | >14 | 0.07 | 20.0 |
If we take the highest tolerated sea state as 6, then 90.77% of all wave heights are tolerated.
It follows that since the values given are <(h
w)
1/3>, <h
w> = 0.625 * <(h
w)
1/3> for sea state 6 according to the Rayleigh density functions.
According to the US Naval Academy (2003), gH/V
2 = β(F
* - 0.1)
2(y/L)
-1/3.
At y/L = 0.01 (bow), L
e = L
forecastle, and d = 4028 m, H = 0.869 m (2.817').
At y/L = 0.2, H = 0.320 m (1.038').
At y/L = 1, H = 0.187 m (0.607').
CCS model says 15.21% deck wetness in sea state 6.
To follow another path of calculations:
According to Tasaki (1963), the bow wave height is 0.99 m.
According to the CCS Model the deck wetness is 19.11% at <(h
w)
1/3>=5m. In sea state 5, the deck wetness is 7.84% at <(h
w)
1/3>=3.25m.
The conclusion is that the design works in general, but ~20% short term wetness is still quite a lot. If I want a deck wetness of 5% in sea state 6, I'll need a minimum bow height of 11'.
I'm not sure but maybe SS sees the problem there as:
In my SS, the guns are deck-level which means the water will wash overboard. In the heightened deck SS, the guns are under the deck and water that floods in will stay in the compartment. This causes the problem SS predicts.
If I raised the deck to 10' with a 11' bow, H-10 looks like this:
QuoteH-10 Scheme 5A2, Scout Battleship laid down 1870
Armoured Corvette (Broadside ironclad)
Displacement:
3,000 t light; 3,233 t standard; 3,433 t normal; 3,593 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(264.00 ft / 260.00 ft) x 45.00 ft x (19.00 / 19.71 ft)
(80.47 m / 79.25 m) x 13.72 m x (5.79 / 6.01 m)
Armament:
20 - 8.00" / 203 mm 14.8 cal guns - 174.76lbs / 79.27kg shells, 85 per gun
Muzzle loading guns in broadside mounts, 1870 Model
20 x Single mounts on sides, evenly spread
Weight of broadside 3,495 lbs / 1,585 kg
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.00" / 76 mm 160.00 ft / 48.77 m 9.00 ft / 2.74 m
Ends: Unarmoured
Main Belt covers 95 % of normal length
- Armoured deck - single deck:
For and Aft decks: 1.00" / 25 mm
Forecastle: 1.00" / 25 mm Quarter deck: 1.00" / 25 mm
Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 1 shaft, 2,947 ihp / 2,199 Kw = 14.00 kts
Range 2,500nm at 7.00 kts
Bunker at max displacement = 359 tons (100% coal)
Complement:
223 - 291
Cost:
£0.264 million / $1.058 million
Distribution of weights at normal displacement:
Armament: 157 tons, 4.6 %
- Guns: 157 tons, 4.6 %
Armour: 339 tons, 9.9 %
- Belts: 193 tons, 5.6 %
- Armour Deck: 146 tons, 4.3 %
Machinery: 722 tons, 21.0 %
Hull, fittings & equipment: 1,300 tons, 37.9 %
Fuel, ammunition & stores: 433 tons, 12.6 %
Miscellaneous weights: 481 tons, 14.0 %
- Above deck: 481 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
2,516 lbs / 1,141 Kg = 14.0 x 8.0 " / 203 mm shells or 1.0 torpedoes
Stability (Unstable if below 1.00): 1.26
Metacentric height 2.3 ft / 0.7 m
Roll period: 12.5 seconds
Steadiness - As gun platform (Average = 50 %): 72 %
- Recoil effect (Restricted arc if above 1.00): 0.75
Seaboat quality (Average = 1.00): 1.72
Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.541 / 0.545
Length to Beam Ratio: 5.78 : 1
'Natural speed' for length: 16.12 kts
Power going to wave formation at top speed: 43 %
Trim (Max stability = 0, Max steadiness = 100): 42
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: -3.00 ft / -0.91 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 11.00 ft / 3.35 m, 10.00 ft / 3.05 m
- Forward deck: 30.00 %, 10.00 ft / 3.05 m, 10.00 ft / 3.05 m
- Aft deck: 30.00 %, 10.00 ft / 3.05 m, 10.00 ft / 3.05 m
- Quarter deck: 20.00 %, 10.00 ft / 3.05 m, 10.00 ft / 3.05 m
- Average freeboard: 10.08 ft / 3.07 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 88.2 %
- Above water (accommodation/working, high = better): 66.9 %
Waterplane Area: 7,836 Square feet or 728 Square metres
Displacement factor (Displacement / loading): 122 %
Structure weight / hull surface area: 112 lbs/sq ft or 546 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.88
- Longitudinal: 3.01
- Overall: 1.00
Adequate machinery, storage, compartmentation space
Cramped accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather
Sail speed = 16.0 knots
Displacement = 3,433.0 tons
7 knots ( 5%) = 171.7 tons
16 knots (14%) = 480.6 tons
A modification of the H-11 scheme (the workhorse of the fleet).
To standardize the range of the ships (the H-11 is the only <2,500 nm ship), I've warped the hull form a bit and squeezed in a 1,000 nm more range (2,500 nm at 7 knots).
QuoteH-11 Scheme 1A2, Cruiser laid down 1870
Displacement:
1,500 t light; 1,572 t standard; 1,700 t normal; 1,803 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(213.28 ft / 210.00 ft) x 33.00 ft x (16.00 / 16.78 ft)
(65.01 m / 64.01 m) x 10.06 m x (4.88 / 5.11 m)
Armament:
2 - 8.00" / 203 mm 15.0 cal guns - 120.00lbs / 54.43kg shells, 80 per gun
Muzzle loading guns in deck mounts, 1870 Model
2 x Single mounts on sides amidships
6 - 6.00" / 152 mm 18.0 cal guns - 80.01lbs / 36.29kg shells, 100 per gun
Muzzle loading guns in deck mounts, 1870 Model
6 x Single mounts on sides, evenly spread
Weight of broadside 720 lbs / 327 kg
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm - -
2nd: 0.50" / 13 mm - -
- Protected deck - single deck:
For and Aft decks: 1.00" / 25 mm
Forecastle: 1.00" / 25 mm Quarter deck: 1.00" / 25 mm
Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 1 shaft, 3,418 ihp / 2,549 Kw = 16.00 kts
Range 2,500nm at 7.00 kts
Bunker at max displacement = 231 tons (100% coal)
Complement:
132 - 172
Cost:
£0.173 million / $0.691 million
Distribution of weights at normal displacement:
Armament: 45 tons, 2.7 %
- Guns: 45 tons, 2.7 %
Armour: 101 tons, 6.0 %
- Armament: 15 tons, 0.9 %
- Armour Deck: 86 tons, 5.1 %
Machinery: 751 tons, 44.2 %
Hull, fittings & equipment: 518 tons, 30.5 %
Fuel, ammunition & stores: 200 tons, 11.7 %
Miscellaneous weights: 85 tons, 5.0 %
- Above deck: 85 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
428 lbs / 194 Kg = 2.4 x 8.0 " / 203 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.24
Metacentric height 1.4 ft / 0.4 m
Roll period: 11.7 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.33
Seaboat quality (Average = 1.00): 1.01
Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.537 / 0.543
Length to Beam Ratio: 6.36 : 1
'Natural speed' for length: 14.49 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 69
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 9.00 ft / 2.74 m, 7.00 ft / 2.13 m
- Forward deck: 30.00 %, 7.00 ft / 2.13 m, 6.50 ft / 1.98 m
- Aft deck: 30.00 %, 6.50 ft / 1.98 m, 6.50 ft / 1.98 m
- Quarter deck: 20.00 %, 6.50 ft / 1.98 m, 6.50 ft / 1.98 m
- Average freeboard: 6.84 ft / 2.08 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 152.7 %
- Above water (accommodation/working, high = better): 44.2 %
Waterplane Area: 4,621 Square feet or 429 Square metres
Displacement factor (Displacement / loading): 85 %
Structure weight / hull surface area: 72 lbs/sq ft or 352 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.91
- Longitudinal: 2.26
- Overall: 1.00
Cramped machinery, storage, compartmentation space
Extremely poor accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Sail speed = 7.0 knots
Displacement = 1,700.0 tons
7 knots ( 5%) = 85.0 tons