Proto-Battleship or Evolved Monitor

[Sachmle]

That's a lot of freeboard for a monitor. IIRC the original only had 4'.

[snip]

Better?

Kalamath Class, Oregon Ironclad Costal Monitor laid down 1870
Central citadel ship

Displacement:
   1,817 t light; 1,882 t standard; 1,950 t normal; 2,005 t full load

Dimensions: Length overall / water x beam x draught
   200.00 ft / 200.00 ft x 50.00 ft x 10.00 ft (normal load)
   60.96 m / 60.96 m x 15.24 m  x 3.05 m

Armament:
      2 - 11.00" / 279 mm guns (1x2 guns), 465.00lbs / 210.92kg shells, 1870 Model
     Breech loading guns in Coles/Ericsson turret
     on centreline amidships
   Weight of broadside 930 lbs / 422 kg
   Shells per gun, main battery: 50

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   5.00" / 127 mm   200.00 ft / 60.96 m   8.00 ft / 2.44 m
   Ends:   Unarmoured
     Main Belt covers 154 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   6.00" / 152 mm   5.00" / 127 mm            -

   - Armour deck: 0.50" / 13 mm

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 1 shaft, 800 ihp / 597 Kw = 10.30 kts
   Range 1,500nm at 6.00 kts
   Bunker at max displacement = 123 tons (100% coal)

Complement:
   146 - 190

Cost:
   £0.189 million / $0.755 million

Distribution of weights at normal displacement:
   Armament: 116 tons, 6.0 %
   Armour: 475 tons, 24.4 %
      - Belts: 296 tons, 15.2 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 107 tons, 5.5 %
      - Armour Deck: 72 tons, 3.7 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 196 tons, 10.1 %
   Hull, fittings & equipment: 1,029 tons, 52.8 %
   Fuel, ammunition & stores: 133 tons, 6.8 %
   Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1,705 lbs / 773 Kg = 3.7 x 11.0 " / 279 mm shells or 0.7 torpedoes
   Stability (Unstable if below 1.00): 1.47
   Metacentric height 3.4 ft / 1.0 m
   Roll period: 11.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.13
   Seaboat quality  (Average = 1.00): 0.93

Hull form characteristics:
   Hull has raised forecastle
   Block coefficient: 0.683
   Length to Beam Ratio: 4.00 : 1
   'Natural speed' for length: 14.14 kts
   Power going to wave formation at top speed: 39 %
   Trim (Max stability = 0, Max steadiness = 100): 54
   Bow angle (Positive = bow angles forward): -5.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      7.00 ft / 2.13 m
      - Forecastle (20 %):   7.00 ft / 2.13 m (5.00 ft / 1.52 m aft of break)
      - Mid (50 %):      5.00 ft / 1.52 m
      - Quarterdeck (15 %):   5.00 ft / 1.52 m
      - Stern:      5.00 ft / 1.52 m
      - Average freeboard:   5.40 ft / 1.65 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 76.3 %
      - Above water (accommodation/working, high = better): 51.0 %
   Waterplane Area: 7,818 Square feet or 726 Square metres
   Displacement factor (Displacement / loading): 108 %
   Structure weight / hull surface area: 114 lbs/sq ft or 557 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.63
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is cramped
   Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

[Korpen]

Better?
Kalamath Class, Oregon Ironclad Costal Monitor laid down 1870
Central citadel ship

There is no real problem with a bit higher freeboard; I am more concerned with her lack of deck armour. It is quite likely shot from an enemy ship will strike the deck considering how low she is, and just 13mm will not keep out shot from any enemy major vessel. But then neither is the pretty thin armour...

[snip]

for 50t and a foot of belt height I was able to add  an inch to the deck. This better?

Kalamath Class, Oregon Ironclad Costal Monitor laid down 1870
Central citadel ship

Displacement:
   1,864 t light; 1,930 t standard; 2,000 t normal; 2,056 t full load

Dimensions: Length overall / water x beam x draught
   200.00 ft / 200.00 ft x 50.00 ft x 10.00 ft (normal load)
   60.96 m / 60.96 m x 15.24 m  x 3.05 m

Armament:
      2 - 11.00" / 279 mm guns (1x2 guns), 465.00lbs / 210.92kg shells, 1870 Model
     Muzzle loading guns in Coles/Ericsson turret
     on centreline amidships
   Weight of broadside 930 lbs / 422 kg
   Shells per gun, main battery: 50

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   4.50" / 114 mm   200.00 ft / 60.96 m   7.00 ft / 2.13 m
   Ends:   Unarmoured
     Main Belt covers 154 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   4.00" / 102 mm   4.00" / 102 mm            -

   - Armour deck: 1.50" / 38 mm

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 1 shaft, 800 ihp / 597 Kw = 10.24 kts
   Range 1,500nm at 6.00 kts
   Bunker at max displacement = 126 tons (100% coal)

Complement:
   149 - 194

Cost:
   £0.191 million / $0.762 million

Distribution of weights at normal displacement:
   Armament: 116 tons, 5.8 %
   Armour: 530 tons, 26.5 %
      - Belts: 233 tons, 11.7 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 76 tons, 3.8 %
      - Armour Deck: 221 tons, 11.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 196 tons, 9.8 %
   Hull, fittings & equipment: 1,022 tons, 51.1 %
   Fuel, ammunition & stores: 136 tons, 6.8 %
   Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1,706 lbs / 774 Kg = 3.7 x 11.0 " / 279 mm shells or 0.8 torpedoes
   Stability (Unstable if below 1.00): 1.34
   Metacentric height 3.0 ft / 0.9 m
   Roll period: 12.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 66 %
         - Recoil effect (Restricted arc if above 1.00): 0.16
   Seaboat quality  (Average = 1.00): 0.95

Hull form characteristics:
   Hull has raised forecastle
   Block coefficient: 0.700
   Length to Beam Ratio: 4.00 : 1
   'Natural speed' for length: 14.14 kts
   Power going to wave formation at top speed: 39 %
   Trim (Max stability = 0, Max steadiness = 100): 70
   Bow angle (Positive = bow angles forward): -5.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      7.00 ft / 2.13 m
      - Forecastle (20 %):   7.00 ft / 2.13 m (5.00 ft / 1.52 m aft of break)
      - Mid (50 %):      5.00 ft / 1.52 m
      - Quarterdeck (15 %):   5.00 ft / 1.52 m
      - Stern:      5.00 ft / 1.52 m
      - Average freeboard:   5.40 ft / 1.65 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 74.4 %
      - Above water (accommodation/working, high = better): 50.9 %
   Waterplane Area: 7,962 Square feet or 740 Square metres
   Displacement factor (Displacement / loading): 108 %
   Structure weight / hull surface area: 112 lbs/sq ft or 545 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.62
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is cramped
   Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

EDIT: fixed a error

[snip]

Further tinkering with the BBish ship yealds this

Willamette, Oregon Barbette Battleship laid down 1880
Barbette ship

Displacement:
   8,995 t light; 9,318 t standard; 10,000 t normal; 10,546 t full load

Dimensions: Length overall / water x beam x draught
   330.00 ft / 325.00 ft x 70.00 ft x 26.50 ft (normal load)
   100.58 m / 99.06 m x 21.34 m  x 8.08 m

Armament:
      4 - 11.00" / 279 mm guns (2x2 guns), 550.00lbs / 249.48kg shells, 1880 Model
     Breech loading guns in open barbettes
     on centreline ends, evenly spread
      6 - 6.00" / 152 mm guns in single mounts, 100.00lbs / 45.36kg shells, 1880 Model
     Breech loading guns in casemate mounts
     on side, all amidships
      8 - 2.00" / 50.8 mm guns in single mounts, 3.50lbs / 1.59kg shells, 1880 Model
     Breech loading guns in deck mounts
     on side, evenly spread, 4 raised mounts
      8 - 0.75" / 19.1 mm guns in single mounts, 0.25lbs / 0.11kg shells, 1880 Model
     Breech loading guns in deck mounts
     on side, evenly spread, 4 raised mounts
   Weight of broadside 2,830 lbs / 1,284 kg
   Shells per gun, main battery: 75

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   18.0" / 457 mm   214.50 ft / 65.38 m   10.00 ft / 3.05 m
   Ends:   Unarmoured
     Main Belt covers 102 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:         -            -         14.0" / 356 mm
   3rd:   4.00" / 102 mm         -               -
   4th:   0.50" / 13 mm         -               -

   - Armour deck: 3.00" / 76 mm, Conning tower: 12.00" / 305 mm

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 11,000 ihp / 8,206 Kw = 17.15 kts
   Range 3,000nm at 10.00 kts
   Bunker at max displacement = 1,228 tons (100% coal)

Complement:
   499 - 650

Cost:
   £0.931 million / $3.726 million

Distribution of weights at normal displacement:
   Armament: 355 tons, 3.6 %
   Armour: 3,375 tons, 33.7 %
      - Belts: 1,741 tons, 17.4 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 607 tons, 6.1 %
      - Armour Deck: 907 tons, 9.1 %
      - Conning Tower: 120 tons, 1.2 %
   Machinery: 2,273 tons, 22.7 %
   Hull, fittings & equipment: 2,902 tons, 29.0 %
   Fuel, ammunition & stores: 1,005 tons, 10.0 %
   Miscellaneous weights: 90 tons, 0.9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     7,191 lbs / 3,262 Kg = 12.7 x 11.0 " / 279 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.31
   Metacentric height 4.7 ft / 1.4 m
   Roll period: 13.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.16
   Seaboat quality  (Average = 1.00): 1.19

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.581
   Length to Beam Ratio: 4.64 : 1
   'Natural speed' for length: 18.03 kts
   Power going to wave formation at top speed: 53 %
   Trim (Max stability = 0, Max steadiness = 100): 59
   Bow angle (Positive = bow angles forward): -5.00 degrees
   Stern overhang: 5.00 ft / 1.52 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      11.00 ft / 3.35 m
      - Forecastle (19 %):   11.00 ft / 3.35 m
      - Mid (50 %):      11.00 ft / 3.35 m
      - Quarterdeck (15 %):   11.00 ft / 3.35 m
      - Stern:      11.00 ft / 3.35 m
      - Average freeboard:   11.00 ft / 3.35 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 101.1 %
      - Above water (accommodation/working, high = better): 68.6 %
   Waterplane Area: 16,339 Square feet or 1,518 Square metres
   Displacement factor (Displacement / loading): 92 %
   Structure weight / hull surface area: 127 lbs/sq ft or 618 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.91
      - Longitudinal: 2.47
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is cramped
   Ship has slow, easy roll, a good, steady gun platform

[TexanCowboy]

I don't like the machine guns. Honestly, they're likely just to be breech-loading rifles on a pivot, at this point in time. I'd think about replacing them with more of the 2'' revolving cannon design.

[snip]

what MGs? Ah you mean the .25lb guns. They are more anti-boarder and boarding craft guns, which I think in combo with the 3.5lb guns should make trying to board an interesting time, should any ship be able to catch this one.

[TexanCowboy]

Think you would be better off with the 2''...has more of a chance of preemptively taking out the boats, and with the same ROF...