Attempt at an early battleship

[Darman]

HMS Alexandria

NENS Alexandria, Republic of New England Central-battery Ironclad laid down 1877
Armoured Frigate (Broadside ironclad)

Displacement:
   8,393 t light; 9,057 t standard; 9,644 t normal; 10,113 t full load

Dimensions: Length overall / water x beam x draught
   325.00 ft / 325.00 ft x 64.00 ft x 26.00 ft (normal load)
   99.06 m / 99.06 m x 19.51 m  x 7.92 m

Armament:
      2 - 11.00" / 279 mm guns in single mounts, 535.73lbs / 243.00kg shells, 1877 Model
     Muzzle loading guns in broadside mounts
     on side, all amidships
      10 - 10.00" / 254 mm guns in single mounts, 402.50lbs / 182.57kg shells, 1877 Model
     Muzzle loading guns in broadside mounts
     on side, evenly spread
     8 guns on gundeck (upper belt level) - Limited use in all but light seas
      6 - 3.75" / 95.3 mm guns in single mounts, 21.23lbs / 9.63kg shells, 1877 Model
     Breech loading guns in deck mounts
     on side, evenly spread
   Weight of broadside 5,224 lbs / 2,369 kg
   Shells per gun, main battery: 150
   4 - 14.0" / 355.6 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12.0" / 305 mm   200.29 ft / 61.05 m   9.60 ft / 2.93 m
   Ends:   6.00" / 152 mm   113.73 ft / 34.66 m   9.60 ft / 2.93 m
     10.98 ft / 3.35 m Unarmoured ends
   Upper:   8.00" / 203 mm   211.25 ft / 64.39 m   8.00 ft / 2.44 m
     Main Belt covers 95 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   12.0" / 305 mm         -               -
   2nd:   8.00" / 203 mm         -               -

   - Armour deck: 1.00" / 25 mm

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 5,787 ihp / 4,317 Kw = 14.50 kts
   Range 3,000nm at 9.00 kts
   Bunker at max displacement = 1,056 tons (100% coal)

Complement:
   486 - 632

Cost:
   £1.017 million / $4.068 million

Distribution of weights at normal displacement:
   Armament: 653 tons, 6.8 %
   Armour: 2,887 tons, 29.9 %
      - Belts: 1,907 tons, 19.8 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 692 tons, 7.2 %
      - Armour Deck: 288 tons, 3.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 1,249 tons, 13.0 %
   Hull, fittings & equipment: 3,600 tons, 37.3 %
   Fuel, ammunition & stores: 1,251 tons, 13.0 %
   Miscellaneous weights: 4 tons, 0.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     6,671 lbs / 3,026 Kg = 12.5 x 11.0 " / 279 mm shells or 1.1 torpedoes
   Stability (Unstable if below 1.00): 1.55
   Metacentric height 5.4 ft / 1.6 m
   Roll period: 11.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 51 %
         - Recoil effect (Restricted arc if above 1.00): 0.20
   Seaboat quality  (Average = 1.00): 0.92

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.624
   Length to Beam Ratio: 5.08 : 1
   'Natural speed' for length: 18.03 kts
   Power going to wave formation at top speed: 44 %
   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 (% = measuring location as a percentage of overall length):
      - Stem:      14.00 ft / 4.27 m
      - Forecastle (20 %):   12.62 ft / 3.85 m
      - Mid (50 %):      12.62 ft / 3.85 m
      - Quarterdeck (15 %):   12.62 ft / 3.85 m
      - Stern:      12.62 ft / 3.85 m
      - Average freeboard:   12.73 ft / 3.88 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 94.8 %
      - Above water (accommodation/working, high = better): 72.4 %
   Waterplane Area: 15,559 Square feet or 1,445 Square metres
   Displacement factor (Displacement / loading): 91 %
   Structure weight / hull surface area: 171 lbs/sq ft or 833 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.26
      - Longitudinal: 2.13
      - Overall: 1.33
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is cramped
   Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

4t=4 14in torpedoes

She still has sails and such but I don't know how to model that.  Also, any help with the whole freeboard bit would be greatly appreciated, I still don't quite understand it. 

[snip]

on freeboard: I use 9 foot (or 2.5m if I am going metric) to a deck. I start at the bottom and try to get about 2 decks above water. the draft will influence your freeboard if you do it this way.

On the design: I really don't know what to say...it looks good in comparison to the Alexandra, but I cant say that I am a fan of the concept. this may explane my warshiping (no pun intended, honest ;D) of a "Monitor" style design as the precursor to my battleships

[Darman]

If I made my freeboard 17ft.  I have my lowest deck (underwater) from 26ft below to 19ft below, then my second deck from 19ft below to 10ft below, and my third deck from 10ft below to 1ft below.  Then add another deck to reach 8ft.  and another deck brings it to 17 feet.  Or would that be way too tall?

[snip]

by the look of the picture on the wiki page, 17ft could be close. plug it in and see what happens

[Darman]

NENS Alexandria, Republic of New England Central-battery Ironclad laid down 1877
Armoured Frigate (Broadside ironclad)

Displacement:
   8,393 t light; 9,057 t standard; 9,644 t normal; 10,113 t full load

Dimensions: Length overall / water x beam x draught
   325.00 ft / 325.00 ft x 64.00 ft x 26.00 ft (normal load)
   99.06 m / 99.06 m x 19.51 m  x 7.92 m

Armament:
      2 - 11.00" / 279 mm guns in single mounts, 535.73lbs / 243.00kg shells, 1877 Model
     Muzzle loading guns in broadside mounts
     on side, all amidships
      10 - 10.00" / 254 mm guns in single mounts, 402.50lbs / 182.57kg shells, 1877 Model
     Muzzle loading guns in broadside mounts
     on side, evenly spread
     8 guns on gundeck (upper belt level) - Limited use in heavy seas
      6 - 3.75" / 95.3 mm guns in single mounts, 21.23lbs / 9.63kg shells, 1877 Model
     Breech loading guns in deck mounts
     on side, evenly spread
   Weight of broadside 5,224 lbs / 2,369 kg
   Shells per gun, main battery: 150
   4 - 14.0" / 355.6 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12.0" / 305 mm   200.29 ft / 61.05 m   9.60 ft / 2.93 m
   Ends:   6.00" / 152 mm   113.73 ft / 34.66 m   9.60 ft / 2.93 m
     10.98 ft / 3.35 m Unarmoured ends
   Upper:   8.00" / 203 mm   211.25 ft / 64.39 m   8.00 ft / 2.44 m
     Main Belt covers 95 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   12.0" / 305 mm         -               -
   2nd:   8.00" / 203 mm         -               -

   - Armour deck: 1.00" / 25 mm

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 5,787 ihp / 4,317 Kw = 14.50 kts
   Range 3,000nm at 9.00 kts
   Bunker at max displacement = 1,056 tons (100% coal)

Complement:
   486 - 632

Cost:
   £1.017 million / $4.068 million

Distribution of weights at normal displacement:
   Armament: 653 tons, 6.8 %
   Armour: 2,887 tons, 29.9 %
      - Belts: 1,907 tons, 19.8 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 692 tons, 7.2 %
      - Armour Deck: 288 tons, 3.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 1,249 tons, 13.0 %
   Hull, fittings & equipment: 3,600 tons, 37.3 %
   Fuel, ammunition & stores: 1,251 tons, 13.0 %
   Miscellaneous weights: 4 tons, 0.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     7,334 lbs / 3,327 Kg = 13.7 x 11.0 " / 279 mm shells or 1.2 torpedoes
   Stability (Unstable if below 1.00): 1.43
   Metacentric height 4.8 ft / 1.5 m
   Roll period: 12.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 81 %
         - Recoil effect (Restricted arc if above 1.00): 0.36
   Seaboat quality  (Average = 1.00): 1.45

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.624
   Length to Beam Ratio: 5.08 : 1
   'Natural speed' for length: 18.03 kts
   Power going to wave formation at top speed: 44 %
   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 (% = measuring location as a percentage of overall length):
      - Stem:      18.00 ft / 5.49 m
      - Forecastle (20 %):   17.00 ft / 5.18 m
      - Mid (50 %):      17.00 ft / 5.18 m
      - Quarterdeck (15 %):   17.00 ft / 5.18 m
      - Stern:      12.62 ft / 3.85 m
      - Average freeboard:   16.75 ft / 5.11 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 94.8 %
      - Above water (accommodation/working, high = better): 97.6 %
   Waterplane Area: 15,559 Square feet or 1,445 Square metres
   Displacement factor (Displacement / loading): 91 %
   Structure weight / hull surface area: 162 lbs/sq ft or 789 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.13
      - Longitudinal: 2.69
      - Overall: 1.23
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is adequate
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

4t=4 14in torpedoes

I'm glad you pointed the whole deck thing out.  It sounds familiar, I think I've been told in the past and have a tendency to forget these things.  Anyways it seems to work out okay, definitely improved my seakeeping a lot.  Which I needed cuz this thing is supposed to be an open-ocean sort of ship. 

[snip]

bah, who needs that, LONG LIVE THE MONITOR!!!! (quietly starts designing some big ACs for colonial duty)

[Darman]

lol, fortunately for you the Northwest Passage is still covered by ice year-round, else the Eskimo Conspiracy might find itself invaded and you'd have a new neighbor....

[snip]

is that a challenge? (quietly slips Logi some money for use of coaling stations)

[Logi]

 ;D

[TexanCowboy]

THE TEXAN HAS BEEN DISTURBED. (Sends wild cattle hurling at Mexico, cause it's Mexico.)

[snip]

Fair Warning: North America is going to be sort of nuts ;D

[TexanCowboy]

Welcome to North America: We like fun, games, explosions, violence, rum, lobster, salmon, fajitas, and barbeque! ;D

[snip]

Welcome to North America: We like fun, games, explosions, violence, rum, lobster, salmon, fajitas, and barbeque! ;D

and if my back-story goes through acorting to plan, Vodka, lots o Vodka.

[TexanCowboy]

Oh my.....YES! Can we start nuking the reds now?

[snip]

well, then you better get ready to drop them on me