United Kingdom start-up 1870

[Darman]

Made her a little more expensive (could build two of this version against three of the older version) but she's got a top speed of 13kts.  Ought to be able to keep her distance, at least til nightfall. 

HLNS Ant, Netherlands Commerce Raider laid down 1870
Corvette (Unarmoured)

Displacement:
   650 t light; 694 t standard; 735 t normal; 768 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (160.00 ft / 160.00 ft) x 24.00 ft x (12.00 / 12.42 ft)
   (48.77 m / 48.77 m) x 7.32 m  x (3.66 / 3.79 m)

Armament:
      2 - 6.20" / 157 mm 15.0 cal guns - 88.31lbs / 40.06kg shells, 100 per gun
     Muzzle loading guns in deck mounts, 1870 Model
     1 x Single mount on centreline, forward deck forward
     1 x Single mount on centreline, aft deck aft
     Main guns limited to end-on fire
      4 - 6.20" / 157 mm 15.0 cal guns - 88.31lbs / 40.06kg shells, 100 per gun
     Muzzle loading guns in broadside mounts, 1870 Model
     4 x Single mounts on sides, evenly spread
      Weight of broadside 530 lbs / 240 kg

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 993 ihp / 741 Kw = 13.00 kts
   Range 1,100nm at 7.50 kts
   Bunker at max displacement = 74 tons (100% coal)

Complement:
   69 - 91

Cost:
   £0.065 million / $0.261 million

Distribution of weights at normal displacement:
   Armament: 24 tons, 3.2 %
   Machinery: 243 tons, 33.1 %
   Hull, fittings & equipment: 287 tons, 39.0 %
   Fuel, ammunition & stores: 85 tons, 11.6 %
   Miscellaneous weights: 96 tons, 13.1 %
      - Hull below water: 5 tons
      - Above deck: 91 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     338 lbs / 153 Kg = 4.0 x 6.2 " / 157 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.07
   Metacentric height 0.7 ft / 0.2 m
   Roll period: 12.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 97 %
         - Recoil effect (Restricted arc if above 1.00): 1.57
   Seaboat quality  (Average = 1.00): 1.95

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.558 / 0.563
   Length to Beam Ratio: 6.67 : 1
   'Natural speed' for length: 12.65 kts
   Power going to wave formation at top speed: 50 %
   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 %,  11.64 ft / 3.55 m,  8.57 ft / 2.61 m
      - Forward deck:   30.00 %,  8.57 ft / 2.61 m,  8.57 ft / 2.61 m
      - Aft deck:   35.00 %,  8.57 ft / 2.61 m,  8.57 ft / 2.61 m
      - Quarter deck:   15.00 %,  8.57 ft / 2.61 m,  8.57 ft / 2.61 m
      - Average freeboard:      8.82 ft / 2.69 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 122.0 %
      - Above water (accommodation/working, high = better): 63.9 %
   Waterplane Area: 2,701 Square feet or 251 Square metres
   Displacement factor (Displacement / loading): 111 %
   Structure weight / hull surface area: 60 lbs/sq ft or 293 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.84
      - Longitudinal: 4.42
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   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

Half of natural speed (12.5 knots) is 6.25 knots for 5% of normal displacement, plus 6.25% of normal displacement to bring sailing speed up to 12.5 knots under sail, which totals 11.25% of normal displacement, plus another 1% of normal displacement to add 0.5 knot to total 13 knots of speed.  Total is now 12.25% normal displacement. 
5t miscelleneous weight belowdecks for additional supplies

[KWorld]

How long can she run at full speed?  13 knots is probably a good enough speed, as long as she doesn't encounter a threat up close (in fog or bad weather), in the early morning, or a particularly fast threat.

[Darman]

How long can she run at full speed?  13 knots is probably a good enough speed, as long as she doesn't encounter a threat up close (in fog or bad weather), in the early morning, or a particularly fast threat.

265nm at 13 knots, thats about 20 hours steaming. 

[Darman]

Cicero, United Kingdom Troop Transport laid down 1870

Displacement:
   6,400 t light; 6,548 t standard; 7,363 t normal; 8,015 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (375.00 ft / 375.00 ft) x 50.00 ft x (23.00 / 24.67 ft)
   (114.30 m / 114.30 m) x 15.24 m  x (7.01 / 7.52 m)

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 2,560 ihp / 1,910 Kw = 12.00 kts
   Range 3,000nm at 10.00 kts
   Bunker at max displacement = 1,468 tons (100% coal)

Complement:
   396 - 516

Cost:
   £0.312 million / $1.247 million

Distribution of weights at normal displacement:
   Armament: 0 tons, 0.0 %
   Machinery: 628 tons, 8.5 %
   Hull, fittings & equipment: 2,147 tons, 29.2 %
   Fuel, ammunition & stores: 963 tons, 13.1 %
   Miscellaneous weights: 3,626 tons, 49.2 %
      - Hull below water: 1,000 tons
      - Hull above water: 2,000 tons
      - Above deck: 626 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     6,100 lbs / 2,767 Kg = 80.7 x 6 " / 152 mm shells or 1.1 torpedoes
   Stability (Unstable if below 1.00): 1.01
   Metacentric height 1.8 ft / 0.5 m
   Roll period: 15.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 88 %
         - Recoil effect (Restricted arc if above 1.00): 0.00
   Seaboat quality  (Average = 1.00): 1.77

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.598 / 0.607
   Length to Beam Ratio: 7.50 : 1
   'Natural speed' for length: 19.36 kts
   Power going to wave formation at top speed: 25 %
   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 %,  21.30 ft / 6.49 m,  13.56 ft / 4.13 m
      - Forward deck:   30.00 %,  13.56 ft / 4.13 m,  13.56 ft / 4.13 m
      - Aft deck:   35.00 %,  13.56 ft / 4.13 m,  13.56 ft / 4.13 m
      - Quarter deck:   15.00 %,  13.56 ft / 4.13 m,  13.56 ft / 4.13 m
      - Average freeboard:      14.18 ft / 4.32 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 72.7 %
      - Above water (accommodation/working, high = better): 89.2 %
   Waterplane Area: 13,682 Square feet or 1,271 Square metres
   Displacement factor (Displacement / loading): 151 %
   Structure weight / hull surface area: 96 lbs/sq ft or 468 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.94
      - Longitudinal: 1.71
      - 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, rides out heavy weather easily

Half of natural speed (19 knots) is 9.5 knots for 5% of normal displacement, plus 3.5% of normal displacement to bring sailing speed up to 13 knots under sail, which totals 8.5% of normal displacement. 
3,000t misc weight in hull above and below waterline for 1500 troops (1 regiment)

[KWorld]

> Stability (Unstable if below 1.00): 1.01

Stability's WAY too low for my blood.  Also, I'd recommend fitting a few guns just in case a small raider catches her: I'd hate to surrender a regiment to a 400-ton privateer.  Some Armstrong 40-pounders, for instance (http://en.wikipedia.org/wiki/RBL_40_pounder_Armstrong_gun), would be a good option, or older 68-pounders that no longer have homes.

[Darman]

Good point.  3 40pdrs on each broadside should be sufficient. 

Cicero, United Kingdom Troop Transport laid down 1870
Corvette (Unarmoured)

Displacement:
   6,500 t light; 6,656 t standard; 7,479 t normal; 8,137 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (375.00 ft / 375.00 ft) x 50.00 ft x (23.00 / 24.67 ft)
   (114.30 m / 114.30 m) x 15.24 m  x (7.01 / 7.52 m)

Armament:
      6 - 4.75" / 121 mm 22.0 cal guns - 40.40lbs / 18.32kg shells, 50 per gun
     Breech loading guns in broadside mounts, 1870 Model
     6 x Single mounts on sides, evenly spread
      Weight of broadside 242 lbs / 110 kg

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 2,585 ihp / 1,929 Kw = 12.00 kts
   Range 3,000nm at 10.00 kts
   Bunker at max displacement = 1,481 tons (100% coal)

Complement:
   401 - 522

Cost:
   £0.322 million / $1.287 million

Distribution of weights at normal displacement:
   Armament: 16 tons, 0.2 %
   Machinery: 634 tons, 8.5 %
   Hull, fittings & equipment: 2,204 tons, 29.5 %
   Fuel, ammunition & stores: 979 tons, 13.1 %
   Miscellaneous weights: 3,646 tons, 48.7 %
      - Hull below water: 1,500 tons
      - Hull above water: 1,500 tons
      - Above deck: 646 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     6,473 lbs / 2,936 Kg = 172.6 x 4.8 " / 121 mm shells or 1.1 torpedoes
   Stability (Unstable if below 1.00): 1.07
   Metacentric height 2.0 ft / 0.6 m
   Roll period: 14.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 91 %
         - Recoil effect (Restricted arc if above 1.00): 0.06
   Seaboat quality  (Average = 1.00): 1.82

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.607 / 0.616
   Length to Beam Ratio: 7.50 : 1
   'Natural speed' for length: 19.36 kts
   Power going to wave formation at top speed: 26 %
   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 %,  20.00 ft / 6.10 m,  14.00 ft / 4.27 m
      - Forward deck:   30.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
      - Aft deck:   35.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
      - Quarter deck:   15.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
      - Average freeboard:      14.48 ft / 4.41 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 72.5 %
      - Above water (accommodation/working, high = better): 91.8 %
   Waterplane Area: 13,803 Square feet or 1,282 Square metres
   Displacement factor (Displacement / loading): 151 %
   Structure weight / hull surface area: 98 lbs/sq ft or 477 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.94
      - Longitudinal: 1.76
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is adequate
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Half of natural speed (19 knots) is 9.5 knots for 5% of normal displacement, plus 3.5% of normal displacement to bring sailing speed up to 13 knots under sail, which totals 8.5% of normal displacement. 
3,000t misc weight in hull above and below waterline for 1500 troops (1 regiment)

[Darman]

This is a slight improvement on the Devastation-class.  I'm considering laying down four of these vessels.  The UK does not yet have an empire (unless you count Ireland and Gibraltar as an "empire"). 

Cyclops, Great Britain Battleship laid down 1870
Armoured Corvette (Broadside ironclad)

Displacement:
   8,240 t light; 8,578 t standard; 9,612 t normal; 10,440 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (322.00 ft / 310.00 ft) x 62.00 ft x (26.00 / 27.93 ft)
   (98.15 m / 94.49 m) x 18.90 m  x (7.92 / 8.51 m)

Armament:
      4 - 12.00" / 305 mm 14.0 cal guns - 700.00lbs / 317.51kg shells, 50 per gun
     Muzzle loading guns in Coles/Ericsson turret mounts, 1870 Model
     2 x Twin mounts on centreline ends, evenly spread
      20 - 4.75" / 121 mm 22.0 cal guns - 40.40lbs / 18.32kg shells, 150 per gun
     Breech loading guns in broadside mounts, 1870 Model
     10 x Single mounts on sides, forward deck aft
     10 x Single mounts on sides, aft deck forward
      Weight of broadside 3,608 lbs / 1,637 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   17.0" / 432 mm   198.25 ft / 60.43 m   8.00 ft / 2.44 m
   Ends:   8.00" / 203 mm   106.73 ft / 32.53 m   9.45 ft / 2.88 m
     5.02 ft / 1.53 m Unarmoured ends
   Upper:   17.0" / 432 mm   198.25 ft / 60.43 m   6.00 ft / 1.83 m
     Main Belt covers 98 % of normal length

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

   - Armoured deck - single deck: 2.00" / 51 mm For and Aft decks
   Forecastle: 1.50" / 38 mm  Quarter deck: 1.50" / 38 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, 5,513 ihp / 4,113 Kw = 14.00 kts
   Range 5,500nm at 8.00 kts
   Bunker at max displacement = 1,862 tons (100% coal)

Complement:
   484 - 630

Cost:
   £0.571 million / $2.283 million

Distribution of weights at normal displacement:
   Armament: 194 tons, 2.0 %
   Armour: 3,516 tons, 36.6 %
      - Belts: 2,480 tons, 25.8 %
      - Armament: 414 tons, 4.3 %
      - Armour Deck: 535 tons, 5.6 %
      - Conning Tower: 88 tons, 0.9 %
   Machinery: 1,351 tons, 14.1 %
   Hull, fittings & equipment: 3,179 tons, 33.1 %
   Fuel, ammunition & stores: 1,372 tons, 14.3 %
   Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     10,064 lbs / 4,565 Kg = 16.6 x 12.0 " / 305 mm shells or 1.7 torpedoes
   Stability (Unstable if below 1.00): 1.33
   Metacentric height 4.0 ft / 1.2 m
   Roll period: 13.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 74 %
         - Recoil effect (Restricted arc if above 1.00): 0.40
   Seaboat quality  (Average = 1.00): 1.49

Hull form characteristics:
   Hull has a flush deck,
     a ram bow and a cruiser stern
   Block coefficient (normal/deep): 0.673 / 0.681
   Length to Beam Ratio: 5.00 : 1
   'Natural speed' for length: 17.61 kts
   Power going to wave formation at top speed: 45 %
   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 %,  15.00 ft / 4.57 m,  12.00 ft / 3.66 m
      - Forward deck:   30.00 %,  12.00 ft / 3.66 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 %,  10.00 ft / 3.05 m,  10.00 ft / 3.05 m
      - Average freeboard:      10.94 ft / 3.33 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 56.4 %
      - Above water (accommodation/working, high = better): 61.9 %
   Waterplane Area: 15,039 Square feet or 1,397 Square metres
   Displacement factor (Displacement / loading): 135 %
   Structure weight / hull surface area: 151 lbs/sq ft or 736 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

[KWorld]

Block coefficient is very high, and l:b pretty low.

Broadside guns are on the main deck?  I'd be a bit concerned about the 12" guns firing over them myself.

[Darman]

Block coefficient is very high, and l:b pretty low.

Broadside guns are on the main deck?  I'd be a bit concerned about the 12" guns firing over them myself.

I was considering that myself right after I posted it.  I did place them mid-ship, whereas the turrets are further fore and aft, I don't know if that would make all that much of a difference or not though. 

[KWorld]

Block coefficient is very high, and l:b pretty low.

Broadside guns are on the main deck?  I'd be a bit concerned about the 12" guns firing over them myself.

I was considering that myself right after I posted it.  I did place them mid-ship, whereas the turrets are further fore and aft, I don't know if that would make all that much of a difference or not though.

It would certainly help during broadside actions, it's when the turrets are firing towards the bow or stern that it will be an issue.

[Darman]

Block coefficient is very high, and l:b pretty low.

Broadside guns are on the main deck?  I'd be a bit concerned about the 12" guns firing over them myself.

I was considering that myself right after I posted it.  I did place them mid-ship, whereas the turrets are further fore and aft, I don't know if that would make all that much of a difference or not though.

did you mean the reverse? 

It would certainly help during broadside actions, it's when the turrets are firing towards the bow or stern that it will be an issue.

[KWorld]

What I meant was: having the secondary battery centered while the turrets are on the ends will help as long as the turrets are firing to the broadside (there would be some blast, but probably not so much as to be a problem).  It's when the aft turret is trying to fire at a target that's forward of dead abeam or when the fore turret is trying to fire at targets aft of dead abeam where the real problems will occur.

[Darman]

What I meant was: having the secondary battery centered while the turrets are on the ends will help as long as the turrets are firing to the broadside (there would be some blast, but probably not so much as to be a problem).  It's when the aft turret is trying to fire at a target that's forward of dead abeam or when the fore turret is trying to fire at targets aft of dead abeam where the real problems will occur.

okay I understand now.  Forgive me, my mind is slightly more addled than usual due to a cold and all the tea I've been drinking (peppermint tea helps but if I drink a lot it makes me a little loopy)

[Darman]

Now... question for you Kworld, but do you think it would be period-appropriate for me to make the freeboard amidships higher than the foredeck and quarterdeck?  That would allow me to place the broadside guns below the freeboard deck in a covered position where they theoretically won't be blown overboard by the main guns firing. 

[KWorld]

Now... question for you Kworld, but do you think it would be period-appropriate for me to make the freeboard amidships higher than the foredeck and quarterdeck?  That would allow me to place the broadside guns below the freeboard deck in a covered position where they theoretically won't be blown overboard by the main guns firing.

Period-wise. it would be a bit unusual, but I don't know of any reason it wouldn't be possible.  SS3, however, might resist, since it puts the turrets atop the main deck.  Unless you turrets below-decks.....