CSA 1915 New Designs

[Guinness]

Recent events have revealed that the Confederate Navy's fleet train is woefully inadequate. In a crash program, a large civilian tanker design has been adapted as a new fleet oiler, the Oak class.


(Click image to see full resolution)

CSS Oak, CSA Oiler laid down 1915 (Engine 1912)

Displacement:
   10,000 t light; 10,397 t standard; 19,643 t normal; 27,040 t full load

Dimensions: Length overall / water x beam x draught
   557.00 ft / 551.00 ft x 72.50 ft x 27.10 ft (normal load)
   169.77 m / 167.94 m x 22.10 m  x 8.26 m

Armament:
      2 - 3.50" / 88.9 mm guns in single mounts, 20.00lbs / 9.07kg shells, 1915 Model
     Breech loading guns in deck mounts
     on centreline ends, evenly spread, all raised mounts
      4 - 1.00" / 25.4 mm guns (2x2 guns), 0.50lbs / 0.23kg shells, 1915 Model
     Anti-aircraft guns in deck mounts
     on centreline ends, evenly spread, all raised mounts
      4 - 1.00" / 25.4 mm guns (2x2 guns), 0.50lbs / 0.23kg shells, 1915 Model
     Anti-aircraft guns in deck mounts
     on centreline, all amidships, all raised mounts - superfiring
   Weight of broadside 44 lbs / 20 kg
   Shells per gun, main battery: 150

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 16,000 shp / 11,936 Kw = 18.20 kts
   Range 82,320nm at 10.00 kts
   Bunker at max displacement = 16,643 tons

Complement:
   829 - 1,078

Cost:
   £0.646 million / $2.585 million

Distribution of weights at normal displacement:
   Armament: 6 tons, 0.0 %
   Machinery: 638 tons, 3.2 %
   Hull, fittings & equipment: 4,232 tons, 21.5 %
   Fuel, ammunition & stores: 9,643 tons, 49.1 %
   Miscellaneous weights: 5,124 tons, 26.1 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     46,110 lbs / 20,915 Kg = 2,150.9 x 3.5 " / 89 mm shells or 5.7 torpedoes
   Stability (Unstable if below 1.00): 1.15
   Metacentric height 4.0 ft / 1.2 m
   Roll period: 15.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 94 %
         - Recoil effect (Restricted arc if above 1.00): 0.00
   Seaboat quality  (Average = 1.00): 1.89

Hull form characteristics:
   Hull has raised forecastle, rise aft of midbreak
   Block coefficient: 0.635
   Length to Beam Ratio: 7.60 : 1
   'Natural speed' for length: 23.47 kts
   Power going to wave formation at top speed: 37 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 6.00 ft / 1.83 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      26.00 ft / 7.92 m
      - Forecastle (10 %):   25.00 ft / 7.62 m (16.00 ft / 4.88 m aft of break)
      - Mid (74 %):      16.00 ft / 4.88 m (25.00 ft / 7.62 m aft of break)
      - Quarterdeck (10 %):   25.00 ft / 7.62 m
      - Stern:      26.00 ft / 7.92 m
      - Average freeboard:   19.33 ft / 5.89 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 40.5 %
      - Above water (accommodation/working, high = better): 123.4 %
   Waterplane Area: 30,183 Square feet or 2,804 Square metres
   Displacement factor (Displacement / loading): 305 %
   Structure weight / hull surface area: 93 lbs/sq ft or 453 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.30
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   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

Misc Weights:

25t: Long Range Marconi
4500: Above Waterline Oil
499: Cargo, stores and reserve

Costs: $1.375 and 1.375BP

[maddox]

Can I order the plans?

[Guinness]

I see no reason why the CSA would not license the design to France.

[Guinness]

The other fleet auxiliary in the 1915 program is also an adapted civilian design, in this case a liner used in routes between Confederate and Rohirim ports and destinations in the Pacific.


(click image to see full resolution)

CSS Rio Grande, CSA Transport laid down 1915 (Engine 1912)

Displacement:
   13,410 t light; 13,713 t standard; 14,954 t normal; 15,947 t full load

Dimensions: Length overall / water x beam x draught
   557.00 ft / 543.00 ft x 77.50 ft x 19.90 ft (normal load)
   169.77 m / 165.51 m x 23.62 m  x 6.07 m

Armament:
      2 - 3.50" / 88.9 mm guns in single mounts, 20.00lbs / 9.07kg shells, 1915 Model
     Breech loading guns in deck mounts
     on centreline ends, evenly spread
      2 - 1.58" / 40.0 mm guns in single mounts, 2.00lbs / 0.91kg shells, 1915 Model
     Anti-aircraft guns in deck mounts
     on side, all aft
      4 - 1.00" / 25.4 mm guns (2x2 guns), 0.50lbs / 0.23kg shells, 1915 Model
     Machine guns in deck mounts
     on side, all forward
   Weight of broadside 46 lbs / 21 kg
   Shells per gun, main battery: 150

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.25" / 6 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 26,000 shp / 19,396 Kw = 21.52 kts
   Range 8,045nm at 12.00 kts
   Bunker at max displacement = 2,234 tons

Complement:
   675 - 878

Cost:
   £0.901 million / $3.605 million

Distribution of weights at normal displacement:
   Armament: 6 tons, 0.0 %
   Armour: 1 tons, 0.0 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 1 tons, 0.0 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 1,037 tons, 6.9 %
   Hull, fittings & equipment: 4,537 tons, 30.3 %
   Fuel, ammunition & stores: 1,545 tons, 10.3 %
   Miscellaneous weights: 7,829 tons, 52.4 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     25,714 lbs / 11,664 Kg = 1,199.5 x 3.5 " / 89 mm shells or 2.7 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 4.1 ft / 1.2 m
   Roll period: 16.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.00
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.625
   Length to Beam Ratio: 7.01 : 1
   'Natural speed' for length: 23.30 kts
   Power going to wave formation at top speed: 45 %
   Trim (Max stability = 0, Max steadiness = 100): 25
   Bow angle (Positive = bow angles forward): 11.31 degrees
   Stern overhang: 8.00 ft / 2.44 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      30.00 ft / 9.14 m
      - Forecastle (10 %):   28.00 ft / 8.53 m
      - Mid (50 %):      27.00 ft / 8.23 m
      - Quarterdeck (10 %):   27.50 ft / 8.38 m
      - Stern:      28.00 ft / 8.53 m
      - Average freeboard:   27.56 ft / 8.40 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 80.3 %
      - Above water (accommodation/working, high = better): 243.4 %
   Waterplane Area: 31,503 Square feet or 2,927 Square metres
   Displacement factor (Displacement / loading): 150 %
   Structure weight / hull surface area: 94 lbs/sq ft or 459 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.91
      - Longitudinal: 2.13
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is excellent
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Misc Weight:
6250 tons: 2500 Army officers and men
200t: 8 Large motor launches (25t weight each)
60t: 4 Motor whale boats (15t weight each)
1294t: Cargo and reserve
25t: Long Range Marconi

Costs: $3.2625 and 3.3625 BP

[Guinness]

The small sloops of the S-1 class and their minesweeping cousins of the SM-1 class are viewed as largely successful. The CSN can never have enough small cheap coastal patrol vessels, but at the same time also has requirements for similarly sized vessels for minesweeping and tending and laying defensive minefields. Additionally, while every ship of this class will have a short range wireless set, officers in the coast defense command expressed a desire for ships that could transmit at greater distances when traveling further away from short stations.

All of these requirements were found to be obtainable on a common hull, and ships equipped for each mission are considered one class. Minesweepers and layers can be reconfigured for the other role in 24 - 48 hours. The basic patrol version can be converted to sweeping or laying with between one and two weeks of yard time. Conversion of the long range patrol version isn't expected to be feasible without a refit in a dockyard.

Machinery is 4 diesel engines derived from submarine practice, with two clutched directly to each shaft.



1916 Sloop, CSA Sloop laid down 1915 (Engine 1912)

Displacement:
   300 t light; 313 t standard; 423 t normal; 511 t full load

Dimensions: Length overall / water x beam x draught
   195.00 ft / 185.00 ft x 20.50 ft x 6.60 ft (normal load)
   59.44 m / 56.39 m x 6.25 m  x 2.01 m

Armament:
      2 - 3.50" / 88.9 mm guns in single mounts, 20.00lbs / 9.07kg shells, 1915 Model
     Quick firing guns in deck mounts
     on centreline, evenly spread
      2 - 1.00" / 25.4 mm guns (1x2 guns), 0.50lbs / 0.23kg shells, 1915 Model
     Anti-aircraft guns in deck mount
     on centreline amidships, all raised guns - superfiring
      4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1915 Model
     Breech loading guns in deck mounts
     on side, evenly spread, 2 raised mounts
   Weight of broadside 41 lbs / 19 kg
   Shells per gun, main battery: 186

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.25" / 6 mm         -               -
   3rd:   0.25" / 6 mm         -               -
   5th:   0.25" / 6 mm         -               -

Machinery:
   Diesel Internal combustion motors,
   Direct drive, 2 shafts, 2,000 shp / 1,492 Kw = 18.00 kts
   Range 6,000nm at 12.00 kts
   Bunker at max displacement = 198 tons

Complement:
   46 - 60

Cost:
   £0.038 million / $0.153 million

Distribution of weights at normal displacement:
   Armament: 6 tons, 1.3 %
   Armour: 1 tons, 0.3 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 1 tons, 0.3 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 80 tons, 18.9 %
   Hull, fittings & equipment: 177 tons, 42.0 %
   Fuel, ammunition & stores: 123 tons, 29.1 %
   Miscellaneous weights: 36 tons, 8.5 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     880 lbs / 399 Kg = 41.0 x 3.5 " / 89 mm shells or 0.6 torpedoes
   Stability (Unstable if below 1.00): 1.15
   Metacentric height 0.6 ft / 0.2 m
   Roll period: 11.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 80 %
         - Recoil effect (Restricted arc if above 1.00): 0.26
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.591
   Length to Beam Ratio: 9.02 : 1
   'Natural speed' for length: 13.60 kts
   Power going to wave formation at top speed: 58 %
   Trim (Max stability = 0, Max steadiness = 100): 40
   Bow angle (Positive = bow angles forward): 18.45 degrees
   Stern overhang: 5.00 ft / 1.52 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      15.00 ft / 4.57 m
      - Forecastle (10 %):   14.50 ft / 4.42 m
      - Mid (58 %):      14.00 ft / 4.27 m (6.00 ft / 1.83 m aft of break)
      - Quarterdeck (18 %):   7.00 ft / 2.13 m
      - Stern:      8.00 ft / 2.44 m
      - Average freeboard:   11.22 ft / 3.42 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 81.4 %
      - Above water (accommodation/working, high = better): 132.9 %
   Waterplane Area: 2,751 Square feet or 256 Square metres
   Displacement factor (Displacement / loading): 176 %
   Structure weight / hull surface area: 29 lbs/sq ft or 140 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.81
      - Longitudinal: 6.52
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   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

Misc weight used for mission specific equipment, which can include:

Minesweeping Gear (15 tons)
Two Extra Motor Launches (4 tons)
Accommodations for up to a 16 man shore party (32 tons)
36 mines (36 tons)
Long Range Wireless set (25 tons)

[Guinness]

Building plans had always included a second threesome of Chattanooga class cruisers. The Bureau of Ordnance has been eager to ship it's new twin 5.5" mounting in ships other than the Enterprise class Armored Cruisers to gain operational experience. Accordingly, they asked that one of the second group of Chattanoogas ship at least one twin gun mounting.

Detailed design revealed that by dispensing with the sided mountings, twins could be substituted for the singles in A and Y position with little reorganization to magazine spaces or ammunition paths. In the meantime as well, experience from the Around the World Squadron and operations during the recent conflict in Africa illustrated the virtues of fully enclosed mounts in cruisers. Accordingly, the decision was made to mount two twins in all three ships of the second Chattanooga group. The fact that the new configuration provides one more barrel in broadside fire, while costing little in end-on fire is considered a bonus.



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CSS Chattanooga 2nd series, CSA  Cruiser laid down 1915 (Engine 1912)

Displacement:
   4,051 t light; 4,202 t standard; 4,671 t normal; 5,045 t full load

Dimensions: Length overall / water x beam x draught
   446.00 ft / 435.00 ft x 38.75 ft x 18.83 ft (normal load)
   135.94 m / 132.59 m x 11.81 m  x 5.74 m

Armament:
      2 - 5.50" / 140 mm guns (1x2 guns), 75.00lbs / 34.02kg shells, 1915 Model
     Breech loading guns in a deck mount with hoist
     on centreline forward
      4 - 5.50" / 140 mm guns (3 mounts), 75.00lbs / 34.02kg shells, 1915 Model
     Breech loading guns in deck mounts with hoists
     on centreline, all aft, 2 raised mounts - superfiring
      2 - 1.58" / 40.0 mm guns in single mounts, 2.00lbs / 0.91kg shells, 1915 Model
     Anti-aircraft guns in deck mounts
     on side, evenly spread
      8 - 1.00" / 25.4 mm guns (4x2 guns), 0.50lbs / 0.23kg shells, 1915 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 458 lbs / 208 kg
   Shells per gun, main battery: 200
   4 - 20.0" / 508 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   2.75" / 70 mm   354.00 ft / 107.90 m   11.50 ft / 3.51 m
   Ends:   Unarmoured
     Main Belt covers 125 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.00" / 25 mm   0.50" / 13 mm      1.50" / 38 mm
   3rd:   1.00" / 25 mm   0.50" / 13 mm      1.50" / 38 mm

   - Armour deck: 1.00" / 25 mm, Conning tower: 3.00" / 76 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 40,000 shp / 29,840 Kw = 29.00 kts
   Range 6,200nm at 12.00 kts
   Bunker at max displacement = 843 tons

Complement:
   282 - 367

Cost:
   £0.608 million / $2.434 million

Distribution of weights at normal displacement:
   Armament: 63 tons, 1.4 %
   Armour: 695 tons, 14.9 %
      - Belts: 448 tons, 9.6 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 18 tons, 0.4 %
      - Armour Deck: 211 tons, 4.5 %
      - Conning Tower: 18 tons, 0.4 %
   Machinery: 1,595 tons, 34.1 %
   Hull, fittings & equipment: 1,545 tons, 33.1 %
   Fuel, ammunition & stores: 619 tons, 13.3 %
   Miscellaneous weights: 153 tons, 3.3 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     3,166 lbs / 1,436 Kg = 38.1 x 5.5 " / 140 mm shells or 0.7 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 1.4 ft / 0.4 m
   Roll period: 13.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 73 %
         - Recoil effect (Restricted arc if above 1.00): 0.52
   Seaboat quality  (Average = 1.00): 1.24

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.515
   Length to Beam Ratio: 11.23 : 1
   'Natural speed' for length: 20.86 kts
   Power going to wave formation at top speed: 58 %
   Trim (Max stability = 0, Max steadiness = 100): 59
   Bow angle (Positive = bow angles forward): 24.63 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      24.00 ft / 7.32 m
      - Forecastle (15 %):   21.00 ft / 6.40 m
      - Mid (35 %):      20.50 ft / 6.25 m (12.50 ft / 3.81 m aft of break)
      - Quarterdeck (15 %):   12.50 ft / 3.81 m
      - Stern:      12.50 ft / 3.81 m
      - Average freeboard:   15.61 ft / 4.76 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 125.1 %
      - Above water (accommodation/working, high = better): 97.3 %
   Waterplane Area: 11,386 Square feet or 1,058 Square metres
   Displacement factor (Displacement / loading): 103 %
   Structure weight / hull surface area: 69 lbs/sq ft or 335 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.92
      - Longitudinal: 2.03
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is adequate
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

Misc Weights:
100t: Fire Control
25t: Long Range Marconi
4t: 4 Torpedoes
24t: Reserve

Range at 10 knots: 9150 nm
Range at 15 knots: 3725 nm
Range at 25 knots: 977 nm
Range at top speed: 625 nm or 21.55 hours