New Confederate 3rd Class

[Carthaginian]

Ok, my first attempt at a ship for the CSN. I decided to start small (and cheap) to make any errors in design as painless as possible. I have tech for superfiring mounts and hoists, and the oil-fired plant makes for some good range.

Comments?
Suggestions?
Hot Lead?

All are welcome... hopefully she can benefit from the former two and stand up to the latter.



Santa Bouge, Confederate States of America 3rd Class Cruiser laid down 1905

Displacement:
   3,151 t light; 3,290 t standard; 3,870 t normal; 4,334 t full load

Dimensions: Length overall / water x beam x draught
   400.00 ft / 400.00 ft x 40.00 ft x 16.00 ft (normal load)
   121.92 m / 121.92 m x 12.19 m  x 4.88 m

Armament:
      4 - 4.85" / 123 mm guns in single mounts, 55.00lbs / 24.95kg shells, 1905 Model
     Quick firing guns in deck mounts with hoists
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      4 - 4.85" / 123 mm guns in single mounts, 55.00lbs / 24.95kg shells, 1905 Model
     Quick firing guns in deck mounts with hoists
     on side, evenly spread
      8 - 2.24" / 57.0 mm guns in single mounts, 6.00lbs / 2.72kg shells, 1905 Model
     Quick firing guns in deck mounts
     on side, evenly spread, 4 raised mounts
      3 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1905 Model
     Machine guns in deck mounts
     on side ends, majority forward, all raised mounts - superfiring
   Weight of broadside 490 lbs / 222 kg
   Shells per gun, main battery: 200
   4 - 19.5" / 495.3 mm submerged torpedo tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   4.20" / 107 mm   275.00 ft / 83.82 m   12.00 ft / 3.66 m
   Ends:   Unarmoured
     Main Belt covers 106 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   2.10" / 53 mm   0.58" / 15 mm      2.10" / 53 mm
   2nd:   2.10" / 53 mm   0.58" / 15 mm      2.10" / 53 mm
   3rd:   0.53" / 13 mm         -               -
   4th:   0.25" / 6 mm         -               -

   - Armour deck: 1.15" / 29 mm, Conning tower: 4.20" / 107 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 3 shafts, 12,482 shp / 9,312 Kw = 22.00 kts
   Range 9,000nm at 10.00 kts
   Bunker at max displacement = 1,044 tons

Complement:
   244 - 318

Cost:
   £0.295 million / $1.182 million

Distribution of weights at normal displacement:
   Armament: 63 tons, 1.6 %
   Armour: 867 tons, 22.4 %
      - Belts: 573 tons, 14.8 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 39 tons, 1.0 %
      - Armour Deck: 233 tons, 6.0 %
      - Conning Tower: 22 tons, 0.6 %
   Machinery: 946 tons, 24.4 %
   Hull, fittings & equipment: 1,255 tons, 32.4 %
   Fuel, ammunition & stores: 719 tons, 18.6 %
   Miscellaneous weights: 20 tons, 0.5 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     4,451 lbs / 2,019 Kg = 78.0 x 4.9 " / 123 mm shells or 0.9 torpedoes
   Stability (Unstable if below 1.00): 1.34
   Metacentric height 2.1 ft / 0.6 m
   Roll period: 11.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.38
   Seaboat quality  (Average = 1.00): 1.81

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.529
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 20.00 kts
   Power going to wave formation at top speed: 47 %
   Trim (Max stability = 0, Max steadiness = 100): 39
   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:      21.00 ft / 6.40 m
      - Forecastle (20 %):   14.00 ft / 4.27 m
      - Mid (50 %):      14.00 ft / 4.27 m
      - Quarterdeck (15 %):   14.00 ft / 4.27 m
      - Stern:      14.00 ft / 4.27 m
      - Average freeboard:   14.56 ft / 4.44 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 103.5 %
      - Above water (accommodation/working, high = better): 119.7 %
   Waterplane Area: 10,950 Square feet or 1,017 Square metres
   Displacement factor (Displacement / loading): 118 %
   Structure weight / hull surface area: 65 lbs/sq ft or 319 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.66
      - Overall: 1.00
   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
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

[Borys]

Ahoj!
A bit slow. As you are oil fired you have no excuse. 26 knots should be minimum.
IMO excessive armour - 3 inches is enough.
Although she is big enough to comfortably operate c.5 inch guns, I still don't like that calibre point - I'm a 4 or (5,5') 6 inch man.
I suspect 2 inch thick gun shields to hinder training a bit - but I will ask around.

Borys

[Carthaginian]

Ahoj!
A bit slow. As you are oil fired you have no excuse. 26 knots should be minimum.
IMO excessive armour - 3 inches is enough.
Although she is big enough to comfortably operate c.5 inch guns, I still don't like that calibre point - I'm a 4 or (5,5') 6 inch man.
I suspect 2 inch thick gun shields to hinder training a bit - but I will ask around.

Borys

Thanks! I'll work on her a bit, and will repost!
The slower speed came from not knowing how many screws I could fit on that hull. I didn't know if 4 would fit, so I went with three. The big limiter is the fact that I can only get 5000 HP per turbine.
The 4.85" seems to be the standard QF gun that I've inherited. If I re-vamp the fleet, I'm gonna fix that and try moving to a 4.5" gun.
As for the mounts, I thought that since they were hoist mounts, I would have to have them powered in some way.

*whips out some chalk*
Back to the drawing board!

[Borys]

Ahoj!
You can pick other guns - a good candidate:
http://www.navweaps.com/Weapons/WNUS_5-50_mk5.htm

Borys

[Ithekro]

Basic Confederate gun scaling is based on the weight of the shells (55 pounders, 100 pounders, 6 pounders, etc...).

[Carthaginian]

I just simmed another version, but could only get another 1.1 knots... and the cost grew by $.50 or so, plus the displacement topped 4000t. NOT what I had in mind. I don't like it too much, since it's cost and size ballooned and I didn't get but 1.1 knots out of it. This was supposed to be for scouting and perhaps for dealing with or acting as a corsair in the event of 'unpleasantness.' Way too much mission creep. I might have to totally rework it: reducing the number/caliber of guns, etc in order to get it back on track.

[Carthaginian]

Lightened it up by removing a pair of 4.85 inchers, knocked off a couple of hundred tons, and got it to 23.25 knots. It's getting back down towards the displacement and cost that I originally had in mind ($3 and 3000t). Still a bit over on both, but I guess that some tweaking can fix it... though I doubt I can get her much faster till I get better engines. Maybe in the next class...



Santa Bouge, Confederate States of America 3rd Class Cruiser laid down 1905

Displacement:
   3,031 t light; 3,153 t standard; 3,720 t normal; 4,174 t full load

Dimensions: Length overall / water x beam x draught
   400.00 ft / 400.00 ft x 40.00 ft x 16.00 ft (normal load)
   121.92 m / 121.92 m x 12.19 m  x 4.88 m

Armament:
      4 - 4.85" / 123 mm guns in single mounts, 55.00lbs / 24.95kg shells, 1905 Model
     Quick firing guns in deck mounts with hoists
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      2 - 4.85" / 123 mm guns in single mounts, 55.00lbs / 24.95kg shells, 1905 Model
     Quick firing guns in deck mounts with hoists
     on side, all amidships
      8 - 2.24" / 57.0 mm guns in single mounts, 6.00lbs / 2.72kg shells, 1905 Model
     Quick firing guns in deck mounts
     on side, evenly spread, 4 raised mounts
      3 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1905 Model
     Machine guns in deck mounts
     on side ends, majority forward, all raised mounts - superfiring
   Weight of broadside 380 lbs / 172 kg
   Shells per gun, main battery: 200
   4 - 19.5" / 495.3 mm submerged torpedo tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   2.10" / 53 mm   325.00 ft / 99.06 m   12.00 ft / 3.66 m
   Ends:   Unarmoured
     Main Belt covers 125 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   2.10" / 53 mm   0.58" / 15 mm      2.10" / 53 mm
   2nd:   2.10" / 53 mm   0.58" / 15 mm      2.10" / 53 mm
   3rd:   0.53" / 13 mm         -               -
   4th:   0.25" / 6 mm         -               -

   - Armour deck: 1.15" / 29 mm, Conning tower: 4.20" / 107 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 3 shafts, 14,989 shp / 11,182 Kw = 23.25 kts
   Range 9,000nm at 10.00 kts
   Bunker at max displacement = 1,021 tons

Complement:
   237 - 309

Cost:
   £0.306 million / $1.224 million

Distribution of weights at normal displacement:
   Armament: 49 tons, 1.3 %
   Armour: 611 tons, 16.4 %
      - Belts: 330 tons, 8.9 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 31 tons, 0.8 %
      - Armour Deck: 229 tons, 6.1 %
      - Conning Tower: 22 tons, 0.6 %
   Machinery: 1,136 tons, 30.5 %
   Hull, fittings & equipment: 1,216 tons, 32.7 %
   Fuel, ammunition & stores: 689 tons, 18.5 %
   Miscellaneous weights: 20 tons, 0.5 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     3,137 lbs / 1,423 Kg = 55.0 x 4.9 " / 123 mm shells or 0.7 torpedoes
   Stability (Unstable if below 1.00): 1.38
   Metacentric height 2.2 ft / 0.7 m
   Roll period: 11.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.29
   Seaboat quality  (Average = 1.00): 1.68

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.509
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 20.00 kts
   Power going to wave formation at top speed: 49 %
   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:      21.00 ft / 6.40 m
      - Forecastle (20 %):   14.00 ft / 4.27 m
      - Mid (50 %):      14.00 ft / 4.27 m
      - Quarterdeck (15 %):   14.00 ft / 4.27 m
      - Stern:      14.00 ft / 4.27 m
      - Average freeboard:   14.56 ft / 4.44 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 122.3 %
      - Above water (accommodation/working, high = better): 120.9 %
   Waterplane Area: 10,744 Square feet or 998 Square metres
   Displacement factor (Displacement / loading): 113 %
   Structure weight / hull surface area: 64 lbs/sq ft or 313 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.94
      - Longitudinal: 1.67
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather



I'll try and do a line drawing of her sometime after I get some sleep. I've been working on a light AC as well, and it's 'interesting' (read: 'probably unworkable') gun layout has kept me up till 0330 local time. Hopefully, it wasn't wasted time... I'll post that one here as well soon, as these are meant to operate together in the Gulf.