Império do Brasil

[miketr]

To do list

Turret Battleship (coast defense)
Masted Turret Ship (high seas battleship)
Frigate (large cruiser)
Corvettes (small cruiser)

[miketr]

V1.0 of Turret Battleship

Brasil, Império do Brasil Turret Battleship laid down 1870

Displacement:
   7,324 t light; 7,637 t standard; 8,836 t normal; 9,796 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (300.00 ft / 285.00 ft) x 63.00 ft x (26.50 / 28.94 ft)
   (91.44 m / 86.87 m) x 19.20 m  x (8.08 / 8.82 m)

Armament:
      4 - 12.00" / 305 mm 12.0 cal guns - 610.00lbs / 276.69kg shells, 100 per gun
     Muzzle loading guns in Coles/Ericsson turret mounts, 1870 Model
     2 x 2 row twin mounts on centreline ends, evenly spread
      Weight of broadside 2,440 lbs / 1,107 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12.0" / 305 mm   185.25 ft / 56.46 m   9.45 ft / 2.88 m
   Ends:   10.0" / 254 mm     99.73 ft / 30.40 m   9.45 ft / 2.88 m
   Upper:   10.0" / 254 mm   185.25 ft / 56.46 m   8.00 ft / 2.44 m
     Main Belt covers 100 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   14.0" / 356 mm   10.0" / 254 mm            -

   - Armoured deck - multiple decks: 3.00" / 76 mm For and Aft decks
   Forecastle: 2.00" / 51 mm  Quarter deck: 2.00" / 51 mm

   - Conning towers: Forward 9.00" / 229 mm,  Aft 0.00" / 0 mm

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 4,677 ihp / 3,489 Kw = 13.50 kts
   Range 4,000nm at 10.00 kts
   Bunker at max displacement = 2,159 tons (100% coal)

Complement:
   455 - 592

Cost:
   £0.480 million / $1.921 million

Distribution of weights at normal displacement:
   Armament: 146 tons, 1.7 %
   Armour: 3,218 tons, 36.4 %
      - Belts: 2,027 tons, 22.9 %
      - Armament: 386 tons, 4.4 %
      - Armour Deck: 721 tons, 8.2 %
      - Conning Tower: 83 tons, 0.9 %
   Machinery: 1,146 tons, 13.0 %
   Hull, fittings & equipment: 2,764 tons, 31.3 %
   Fuel, ammunition & stores: 1,512 tons, 17.1 %
   Miscellaneous weights: 50 tons, 0.6 %
      - On freeboard deck: 50 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     10,293 lbs / 4,669 Kg = 17.0 x 12.0 " / 305 mm shells or 1.9 torpedoes
   Stability (Unstable if below 1.00): 1.34
   Metacentric height 4.2 ft / 1.3 m
   Roll period: 12.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.27
   Seaboat quality  (Average = 1.00): 1.28

Hull form characteristics:
   Hull has low forecastle, low quarterdeck ,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.650 / 0.660
   Length to Beam Ratio: 4.52 : 1
   'Natural speed' for length: 16.88 kts
   Power going to wave formation at top speed: 46 %
   Trim (Max stability = 0, Max steadiness = 100): 56
   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 %,  8.50 ft / 2.59 m,  8.50 ft / 2.59 m
      - Forward deck:   30.00 %,  10.50 ft / 3.20 m,  10.50 ft / 3.20 m
      - Aft deck:   35.00 %,  10.50 ft / 3.20 m,  10.50 ft / 3.20 m
      - Quarter deck:   15.00 %,  4.00 ft / 1.22 m,  4.00 ft / 1.22 m
      - Average freeboard:      9.13 ft / 2.78 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 51.0 %
      - Above water (accommodation/working, high = better): 60.5 %
   Waterplane Area: 13,755 Square feet or 1,278 Square metres
   Displacement factor (Displacement / loading): 143 %
   Structure weight / hull surface area: 146 lbs/sq ft or 713 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.90
      - Longitudinal: 2.55
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is cramped
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

50 tons for the gold plate on admirals bathtub and the wine celler. 
All Steam, no sails

[KWorld]

You'd probably want "twin mounts" vs the "2 row twin mounts you have", those result in stacked 12" guns.  Draft is quite high.


Other than that, looks very solid.

[miketr]

V1.1
Draft is whats listed in my Conway's All the Worlds Fighting Ships 1860-1905 for HMS Devastation.  I made some changes to the armor layout also.

Michael

Brasil, Império do Brasil Turret Battleship laid down 1870

Displacement:
   7,499 t light; 7,815 t standard; 9,034 t normal; 10,008 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (300.00 ft / 285.00 ft) x 63.00 ft x (26.50 / 28.95 ft)
   (91.44 m / 86.87 m) x 19.20 m  x (8.08 / 8.82 m)

Armament:
      4 - 12.00" / 305 mm 12.0 cal guns - 610.00lbs / 276.69kg shells, 100 per gun
     Muzzle loading guns in Coles/Ericsson turret mounts, 1870 Model
     2 x Twin mounts on centreline ends, evenly spread
      Weight of broadside 2,440 lbs / 1,107 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   14.0" / 356 mm   185.25 ft / 56.46 m   11.00 ft / 3.35 m
   Ends:   10.0" / 254 mm     99.73 ft / 30.40 m   9.50 ft / 2.90 m
   Upper:   10.0" / 254 mm   185.25 ft / 56.46 m   5.00 ft / 1.52 m
     Main Belt covers 100 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   14.0" / 356 mm   10.0" / 254 mm            -

   - Armoured deck - multiple decks: 2.50" / 64 mm For and Aft decks
   Forecastle: 2.00" / 51 mm  Quarter deck: 2.00" / 51 mm

   - Conning towers: Forward 14.00" / 356 mm,  Aft 0.00" / 0 mm

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 5,001 ihp / 3,730 Kw = 13.67 kts
   Range 4,000nm at 10.00 kts
   Bunker at max displacement = 2,193 tons (100% coal)

Complement:
   463 - 602

Cost:
   £0.497 million / $1.989 million

Distribution of weights at normal displacement:
   Armament: 119 tons, 1.3 %
   Armour: 3,294 tons, 36.5 %
      - Belts: 2,124 tons, 23.5 %
      - Armament: 414 tons, 4.6 %
      - Armour Deck: 625 tons, 6.9 %
      - Conning Tower: 131 tons, 1.4 %
   Machinery: 1,226 tons, 13.6 %
   Hull, fittings & equipment: 2,810 tons, 31.1 %
   Fuel, ammunition & stores: 1,535 tons, 17.0 %
   Miscellaneous weights: 50 tons, 0.6 %
      - On freeboard deck: 50 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     10,061 lbs / 4,564 Kg = 16.6 x 12.0 " / 305 mm shells or 1.9 torpedoes
   Stability (Unstable if below 1.00): 1.32
   Metacentric height 4.1 ft / 1.3 m
   Roll period: 13.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.27
   Seaboat quality  (Average = 1.00): 1.23

Hull form characteristics:
   Hull has low forecastle, low quarterdeck ,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.665 / 0.674
   Length to Beam Ratio: 4.52 : 1
   'Natural speed' for length: 16.88 kts
   Power going to wave formation at top speed: 47 %
   Trim (Max stability = 0, Max steadiness = 100): 58
   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 %,  8.50 ft / 2.59 m,  8.50 ft / 2.59 m
      - Forward deck:   30.00 %,  10.50 ft / 3.20 m,  10.50 ft / 3.20 m
      - Aft deck:   35.00 %,  10.50 ft / 3.20 m,  10.50 ft / 3.20 m
      - Quarter deck:   15.00 %,  4.00 ft / 1.22 m,  4.00 ft / 1.22 m
      - Average freeboard:      9.13 ft / 2.78 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 52.7 %
      - Above water (accommodation/working, high = better): 60.2 %
   Waterplane Area: 13,938 Square feet or 1,295 Square metres
   Displacement factor (Displacement / loading): 141 %
   Structure weight / hull surface area: 146 lbs/sq ft or 711 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.90
      - Longitudinal: 2.50
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is cramped
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

50 tons for the gold plate on admirals bathtub and the wine celler. 
All Steam, no sails

[KWorld]

Oh, I agree, HMS Devastation was a deep-draft vessel.  Whether that's the best choice for Brazil or not, I don't know.

[miketr]

A coast defense ship, should smash any wooden hulled ship that comes a calling to kindling.  Its cheap too.  Of course its armor is light, short ranged and slow.

Michael

Rio de Janeiro,  Império do Brasil Coast Defense Ship laid down 1870
Central citadel ship

Displacement:
   3,001 t light; 3,142 t standard; 3,664 t normal; 4,081 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (230.00 ft / 225.00 ft) x 50.00 ft x (17.50 / 19.19 ft)
   (70.10 m / 68.58 m) x 15.24 m  x (5.33 / 5.85 m)

Armament:
      2 - 12.00" / 305 mm 12.0 cal guns - 610.00lbs / 276.69kg shells, 100 per gun
     Muzzle loading guns in Coles/Ericsson turret mount, 1870 Model
     1 x Twin mount on centreline, forward deck centre
      Weight of broadside 1,220 lbs / 553 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   8.00" / 203 mm   146.25 ft / 44.58 m   8.00 ft / 2.44 m
   Ends:   6.00" / 152 mm     78.73 ft / 24.00 m   8.00 ft / 2.44 m
   Upper:   6.00" / 152 mm   146.25 ft / 44.58 m   6.00 ft / 1.83 m
     Main Belt covers 100 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   10.0" / 254 mm   8.00" / 203 mm            -

   - Armoured deck - multiple decks: 1.00" / 25 mm For and Aft decks
   Forecastle: 1.00" / 25 mm  Quarter deck: 1.00" / 25 mm

   - Conning towers: Forward 10.00" / 254 mm,  Aft 0.00" / 0 mm

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 1,142 ihp / 852 Kw = 10.50 kts
   Range 2,500nm at 10.50 kts
   Bunker at max displacement = 939 tons (100% coal)

Complement:
   235 - 306

Cost:
   £0.176 million / $0.703 million

Distribution of weights at normal displacement:
   Armament: 60 tons, 1.6 %
   Armour: 1,192 tons, 32.5 %
      - Belts: 826 tons, 22.5 %
      - Armament: 154 tons, 4.2 %
      - Armour Deck: 161 tons, 4.4 %
      - Conning Tower: 51 tons, 1.4 %
   Machinery: 280 tons, 7.6 %
   Hull, fittings & equipment: 1,444 tons, 39.4 %
   Fuel, ammunition & stores: 663 tons, 18.1 %
   Miscellaneous weights: 25 tons, 0.7 %
      - On freeboard deck: 25 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     7,291 lbs / 3,307 Kg = 12.1 x 12.0 " / 305 mm shells or 2.2 torpedoes
   Stability (Unstable if below 1.00): 1.45
   Metacentric height 3.4 ft / 1.0 m
   Roll period: 11.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 77 %
         - Recoil effect (Restricted arc if above 1.00): 0.33
   Seaboat quality  (Average = 1.00): 1.54

Hull form characteristics:
   Hull has low forecastle, low quarterdeck ,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.651 / 0.662
   Length to Beam Ratio: 4.50 : 1
   'Natural speed' for length: 15.00 kts
   Power going to wave formation at top speed: 38 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   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 %,  6.00 ft / 1.83 m,  6.00 ft / 1.83 m
      - Forward deck:   30.00 %,  10.00 ft / 3.05 m,  10.00 ft / 3.05 m
      - Aft deck:   35.00 %,  10.00 ft / 3.05 m,  10.00 ft / 3.05 m
      - Quarter deck:   15.00 %,  6.00 ft / 1.83 m,  6.00 ft / 1.83 m
      - Average freeboard:      8.60 ft / 2.62 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 35.5 %
      - Above water (accommodation/working, high = better): 69.9 %
   Waterplane Area: 8,628 Square feet or 802 Square metres
   Displacement factor (Displacement / loading): 176 %
   Structure weight / hull surface area: 124 lbs/sq ft or 605 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.89
      - Longitudinal: 2.80
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   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

25 tons for piano in the officers mess and the captains liquor supply

[KWorld]

Looks like a solid breastwork monitor to me.

[miketr]

Sail BB.

I am not happy with the design and will have to think on it.

Pedro II, Império do Brasil Masted Turret Ship laid down 1870

Displacement:
   8,476 t light; 8,844 t standard; 9,491 t normal; 10,010 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (320.00 ft / 305.00 ft) x 72.00 ft x (25.00 / 26.12 ft)
   (97.54 m / 92.96 m) x 21.95 m  x (7.62 / 7.96 m)

Armament:
      4 - 12.00" / 305 mm 12.0 cal guns - 610.00lbs / 276.69kg shells, 100 per gun
     Muzzle loading guns in Coles/Ericsson turret mounts, 1870 Model
     2 x Twin mounts on centreline, evenly spread
      2 - 9.00" / 229 mm 14.0 cal guns - 254.00lbs / 115.21kg shells, 150 per gun
     Breech loading guns in casemate mounts, 1870 Model
     2 x Single mounts on centreline, evenly spread
      Weight of broadside 2,948 lbs / 1,337 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12.0" / 305 mm   185.25 ft / 56.46 m   9.52 ft / 2.90 m
   Ends:   8.00" / 203 mm     99.73 ft / 30.40 m   9.52 ft / 2.90 m
     20.02 ft / 6.10 m Unarmoured ends
   Upper:   8.00" / 203 mm   185.25 ft / 56.46 m   8.00 ft / 2.44 m
     Main Belt covers 93 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   14.0" / 356 mm   10.0" / 254 mm            -
   2nd:   6.00" / 152 mm         -               -

   - Armoured deck - multiple decks: 2.50" / 64 mm For and Aft decks
   Forecastle: 2.00" / 51 mm  Quarter deck: 2.00" / 51 mm

   - Conning towers: Forward 10.00" / 254 mm,  Aft 0.00" / 0 mm

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 5,000 ihp / 3,730 Kw = 13.66 kts
   Range 2,000nm at 10.00 kts
   Bunker at max displacement = 1,166 tons (100% coal)

Complement:
   480 - 625

Cost:
   £0.539 million / $2.158 million

Distribution of weights at normal displacement:
   Armament: 143 tons, 1.5 %
   Armour: 3,137 tons, 33.1 %
      - Belts: 1,873 tons, 19.7 %
      - Armament: 443 tons, 4.7 %
      - Armour Deck: 724 tons, 7.6 %
      - Conning Tower: 97 tons, 1.0 %
   Machinery: 1,225 tons, 12.9 %
   Hull, fittings & equipment: 3,400 tons, 35.8 %
   Fuel, ammunition & stores: 1,015 tons, 10.7 %
   Miscellaneous weights: 570 tons, 6.0 %
      - Above deck: 570 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     12,088 lbs / 5,483 Kg = 20.0 x 12.0 " / 305 mm shells or 2.2 torpedoes
   Stability (Unstable if below 1.00): 1.37
   Metacentric height 5.3 ft / 1.6 m
   Roll period: 13.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 89 %
         - Recoil effect (Restricted arc if above 1.00): 0.28
   Seaboat quality  (Average = 1.00): 1.78

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.605 / 0.611
   Length to Beam Ratio: 4.24 : 1
   'Natural speed' for length: 17.46 kts
   Power going to wave formation at top speed: 44 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   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 %,  12.50 ft / 3.81 m,  12.50 ft / 3.81 m
      - Forward deck:   30.00 %,  12.50 ft / 3.81 m,  12.50 ft / 3.81 m
      - Aft deck:   35.00 %,  12.50 ft / 3.81 m,  12.50 ft / 3.81 m
      - Quarter deck:   15.00 %,  12.50 ft / 3.81 m,  12.50 ft / 3.81 m
      - Average freeboard:      12.50 ft / 3.81 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 51.4 %
      - Above water (accommodation/working, high = better): 80.0 %
   Waterplane Area: 16,138 Square feet or 1,499 Square metres
   Displacement factor (Displacement / loading): 139 %
   Structure weight / hull surface area: 155 lbs/sq ft or 756 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.89
      - Longitudinal: 2.87
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   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

Natural Speed 8.75 knots (475 tons)
50 tons for 25 marines
45 tons for gold plate and other add ons for the admiral.
9" guns are Pivot guns.

[KWorld]

Length to beam ratio is probably too low.  A sail rig plus turrets on the centerline means limited arcs to both sides along with no fore or aft fire, you might be better off with an arrangement like HMS Monarch, or a central battery ship.

[miketr]

http://upload.wikimedia.org/wikipedia/commons/c/ce/HMS_Monarch_diagrams_Brasseys_1888.jpg

I assume the layout would be like Monarch.  How do you set the guns to match?  My assumption is that with a sail rig you are just going to have problems on the turret firing archs and there is no way around it.

You need a turret to mount anything above 10" I figure and I wanted 12" guns.

Something like HMS Sultan might be better.

Michael

[KWorld]

For some reason I was thinking Monarch had her turrets mounted to the sides and capable of cross-decking, don't know why I was thinking that.  Apparently I was confusing her with the later designs, like HMS Inflexible.

As far as central-battery guns, the Austrians would mount 11" guns on SMS Tegethoff, so I think you'd be OK up to about 12".  Bigger, maybe, the French Devastation-class looks like it mounts 34cm guns in a central battery arrangement.