WesWorld

For kicks and giggles, since I mentioned the discovery of the scuttled Oneota/Manco Capac in my Chilean news, I simmed the ship in original condition...

Quoted

[SIZE=3]Canonicus-class, United States Monitor laid down 1864[/SIZE]

Displacement:
1,810 t light; 1,898 t standard; 2,101 t normal; 2,263 t full load

Dimensions: Length overall / water x beam x draught
223.00 ft / 223.00 ft x 43.30 ft x 13.50 ft (normal load)
67.97 m / 67.97 m x 13.20 m x 4.11 m

Armament:
2 - 15.00" / 381 mm guns (1x2 guns), 515.00lbs / 233.60kg shells, 1864 Model
Muzzle loading guns in deck mount
on centreline forward
Weight of broadside 1,030 lbs / 467 kg
Shells per gun, main battery: 80

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 11.0" / 279 mm 11.0" / 279 mm -

- Armour deck: 1.50" / 38 mm, Conning tower: 11.00" / 279 mm

Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 2 shafts, 332 ihp / 248 Kw = 8.00 kts
Range 2,000nm at 8.00 kts
Bunker at max displacement = 365 tons (100% coal)

Complement:
154 - 201

Cost:
£0.291 million / $1.163 million

Distribution of weights at normal displacement:
Armament: 257 tons, 12.3 %
Armour: 512 tons, 24.4 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 284 tons, 13.5 %
- Armour Deck: 189 tons, 9.0 %
- Conning Tower: 39 tons, 1.9 %
Machinery: 80 tons, 3.8 %
Hull, fittings & equipment: 921 tons, 43.8 %
Fuel, ammunition & stores: 290 tons, 13.8 %
Miscellaneous weights: 40 tons, 1.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,390 lbs / 630 Kg = 1.3 x 15.0 " / 381 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.68
Metacentric height 3.4 ft / 1.0 m
Roll period: 9.9 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.17
Seaboat quality (Average = 1.00): 1.66

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.564
Length to Beam Ratio: 5.15 : 1
'Natural speed' for length: 14.93 kts
Power going to wave formation at top speed: 22 %
Trim (Max stability = 0, Max steadiness = 100): 42
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: 8.00 ft / 2.44 m
- Forecastle (20 %): 8.00 ft / 2.44 m
- Mid (50 %): 8.00 ft / 2.44 m
- Quarterdeck (15 %): 8.00 ft / 2.44 m
- Stern: 8.00 ft / 2.44 m
- Average freeboard: 8.00 ft / 2.44 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 102.0 %
- Above water (accommodation/working, high = better): 67.6 %
Waterplane Area: 6,828 Square feet or 634 Square metres
Displacement factor (Displacement / loading): 75 %
Structure weight / hull surface area: 98 lbs/sq ft or 481 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 2.22
- 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
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

I'd think you'd need to use a Coles/Ericsson turret instead of a deck mount for the Dahlgrens. You are also missing the 3-5" iron hull plating, she's a single prop ship, and I think you're overly optimistic on the freeboard. I'd guess closer to 6' max.

If you shift to a Coles-Ericson turret, the ship doesn't work - I tried removing the engines and the armour, and the net result is that I managed to get the hull strength to about 0.84.

Oh, I see why the belt armour isn't working. Silly me forgot to set the length.

Quoted

[SIZE=3]Canonicus, United States Monitor laid down 1864[/SIZE]

Displacement:
1,887 t light; 1,975 t standard; 2,101 t normal; 2,201 t full load

Dimensions: Length overall / water x beam x draught
223.00 ft / 223.00 ft x 43.30 ft x 13.50 ft (normal load)
67.97 m / 67.97 m x 13.20 m x 4.11 m

Armament:
2 - 15.00" / 381 mm guns (1x2 guns), 515.00lbs / 233.60kg shells, 1864 Model
Breech loading guns in deck mount
on centreline forward
Weight of broadside 1,030 lbs / 467 kg
Shells per gun, main battery: 80

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5.00" / 127 mm 144.95 ft / 44.18 m 7.90 ft / 2.41 m
Ends: 1.75" / 44 mm 78.03 ft / 23.78 m 7.90 ft / 2.41 m
Main Belt covers 100 % of normal length
Main belt does not fully cover magazines and engineering spaces

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 11.0" / 279 mm 3.00" / 76 mm -

- Armour deck: 1.50" / 38 mm, Conning tower: 11.00" / 279 mm

Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 2 shafts, 332 ihp / 248 Kw = 8.00 kts
Range 1,200nm at 8.00 kts
Bunker at max displacement = 226 tons (100% coal)

Complement:
154 - 201

Cost:
£0.293 million / $1.172 million

Distribution of weights at normal displacement:
Armament: 257 tons, 12.3 %
Armour: 663 tons, 31.6 %
- Belts: 296 tons, 14.1 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 139 tons, 6.6 %
- Armour Deck: 189 tons, 9.0 %
- Conning Tower: 39 tons, 1.9 %
Machinery: 77 tons, 3.7 %
Hull, fittings & equipment: 849 tons, 40.4 %
Fuel, ammunition & stores: 214 tons, 10.2 %
Miscellaneous weights: 40 tons, 1.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,170 lbs / 531 Kg = 1.1 x 15.0 " / 381 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.47
Metacentric height 2.8 ft / 0.8 m
Roll period: 11.0 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.15
Seaboat quality (Average = 1.00): 1.19

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.564
Length to Beam Ratio: 5.15 : 1
'Natural speed' for length: 14.93 kts
Power going to wave formation at top speed: 22 %
Trim (Max stability = 0, Max steadiness = 100): 59
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: 6.00 ft / 1.83 m
- Forecastle (20 %): 6.00 ft / 1.83 m
- Mid (50 %): 6.00 ft / 1.83 m
- Quarterdeck (15 %): 6.00 ft / 1.83 m
- Stern: 6.00 ft / 1.83 m
- Average freeboard: 6.00 ft / 1.83 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 101.6 %
- Above water (accommodation/working, high = better): 50.7 %
Waterplane Area: 6,828 Square feet or 634 Square metres
Displacement factor (Displacement / loading): 71 %
Structure weight / hull surface area: 95 lbs/sq ft or 463 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.59
- 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

A couple of things.

Looking at a few pics of the Canonicus, it is pretty much like other Civil War monitors and I would say that the freeboard is more likely to be about 4 feet, not 6 feet. 6 feet is about how tall I am and when you see the men on the deck of those ships in pictures, it is obvious that they are a good deal taller than the height of the freeboard.

The main guns should be in Coles/Ericsson turret. The main reason it does not work is because armament weight of the two 15" guns in your sim is 257 tons and the 15" Dahlgren guns are a lot lighter than that (if wiki's right, ~42,000 lbs per gun which is about 19 tons per gun). Even with adittional weight being needed for the mount and a few other things, 257 tons just seems way too much. They are also muzzle loading guns.

Messed around with SS3 as you can set the length of the gun with that one (used the short length, though I am not sure if that is right). 91 tons for two guns + mount + a few otehr things seems more reasonable to me. I guess that some other aspects could be tweaked a bit more, but it is a rough sim.

Canonicus, United States Monitor laid down 1864

Displacement:
1,913 t light; 1,994 t standard; 2,101 t normal; 2,186 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(223.00 ft / 223.00 ft) x 43.30 ft x (13.50 / 13.95 ft)
(67.97 m / 67.97 m) x 13.20 m x (4.11 / 4.25 m)

Armament:
2 - 15.00" / 381 mm 10.8 cal guns - 440.00lbs / 199.58kg shells, 80 per gun
Muzzle loading guns in Coles/Ericsson turret mount, 1864 Model
1 x Twin mount on centreline, forward deck aft
Weight of broadside 880 lbs / 399 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5.00" / 127 mm 120.00 ft / 36.58 m 5.00 ft / 1.52 m
Ends: 2.00" / 51 mm 103.00 ft / 31.39 m 5.00 ft / 1.52 m
Main Belt covers 83% of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 11.0" / 279 mm 11.0" / 279 mm -

- Protected deck - single deck:
For and Aft decks: 1.50" / 38 mm
Forecastle: 1.50" / 38 mm Quarter deck: 1.50" / 38 mm

- Conning towers: Forward 11.00" / 279 mm, Aft 0.00" / 0 mm

Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 1 shaft, 332 ihp / 248 Kw = 8.00 kts
Range 1,000nm at 8.00 kts
Bunker at max displacement = 192 tons (100% coal)

Complement:
154 - 201

Cost:
£0.132 million / $0.528 million

Distribution of weights at normal displacement:
Armament: 91 tons, 4.3%
- Guns: 91 tons, 4.3%
Armour: 685 tons, 32.6%
- Belts: 181 tons, 8.6%
- Armament: 280 tons, 13.3%
- Armour Deck: 186 tons, 8.8%
- Conning Tower: 39 tons, 1.9%
Machinery: 94 tons, 4.5%
Hull, fittings & equipment: 1,043 tons, 49.6%
Fuel, ammunition & stores: 188 tons, 8.9%
Miscellaneous weights: 0 tons, 0.0%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
2,448 lbs / 1,110 Kg = 2.4 x 15.0 " / 381 mm shells or 2.1 torpedoes
Stability (Unstable if below 1.00): 1.17
Metacentric height 1.9 ft / 0.6 m
Roll period: 13.2 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.18
Seaboat quality (Average = 1.00): 0.72

Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.564 / 0.568
Length to Beam Ratio: 5.15 : 1
'Natural speed' for length: 14.93 kts
Power going to wave formation at top speed: 22 %
Trim (Max stability = 0, Max steadiness = 100): 69
Bow angle (Positive = bow angles forward): 0.00 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%, 4.00 ft / 1.22 m, 4.00 ft / 1.22 m
- Forward deck: 30.00%, 4.00 ft / 1.22 m, 4.00 ft / 1.22 m
- Aft deck: 35.00%, 4.00 ft / 1.22 m, 4.00 ft / 1.22 m
- Quarter deck: 15.00%, 4.00 ft / 1.22 m, 4.00 ft / 1.22 m
- Average freeboard: 4.00 ft / 1.22 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 38.4%
- Above water (accommodation/working, high = better): 32.8%
Waterplane Area: 6,638 Square feet or 617 Square metres
Displacement factor (Displacement / loading): 154%
Structure weight / hull surface area: 127 lbs/sq ft or 618 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.48
- Overall: 1.00
Excellent machinery, storage, compartmentation space
Extremely poor accommodation and workspace room
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather