NUS Atlantic Shipyards

[maddox]

18 kts means no DD .5 comp hull strength.

And then 200 tons is very limiting.

[Sachmle]

18 kts means no DD .5 comp hull strength.

And then 200 tons is very limiting.

Well I did this on 245t w/ 1905 engines @ 25kts..so I'm sure w/ 1916 engines and less speed he can save 45t.

Point Mario...ok. Keep 25kts.

[Guinness]

200t is plenty for the mission, on 18 knots, with 1.0 hull strength. Something like this:

Enter ship name, Enter country Enter ship type laid down 1919 (Engine 1916)

Displacement:
   200 t light; 206 t standard; 237 t normal; 261 t full load

Dimensions: Length overall / water x beam x draught
   139.43 ft / 134.51 ft x 19.19 ft x 5.94 ft (normal load)
   42.50 m / 41.00 m x 5.85 m  x 1.81 m

Armament:
      1 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1919 Model
     Quick firing gun in deck mount
     on centreline forward
      2 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.89kg shells, 1919 Model
     Anti-aircraft guns in deck mounts
     on side, all amidships
      2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1919 Model
     Machine guns in deck mounts
     on side, all aft
   Weight of broadside 18 lbs / 8 kg
   Shells per gun, main battery: 150
   2 - 21.0" / 533.4 mm above water torpedoes

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.59" / 15 mm         -               -

Machinery:
   Diesel Internal combustion motors,
   Direct drive, 2 shafts, 1,700 shp / 1,268 Kw = 18.09 kts
   Range 2,500nm at 12.00 kts
   Bunker at max displacement = 54 tons

Complement:
   29 - 39

Cost:
   £0.039 million / $0.155 million

Distribution of weights at normal displacement:
   Armament: 2 tons, 0.9 %
   Armour: 1 tons, 0.4 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 1 tons, 0.4 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 63 tons, 26.8 %
   Hull, fittings & equipment: 116 tons, 48.9 %
   Fuel, ammunition & stores: 36 tons, 15.4 %
   Miscellaneous weights: 18 tons, 7.6 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     403 lbs / 183 Kg = 29.8 x 3.0 " / 76 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.06
   Metacentric height 0.5 ft / 0.1 m
   Roll period: 11.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 72 %
         - Recoil effect (Restricted arc if above 1.00): 0.16
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has low forecastle, rise forward of midbreak
   Block coefficient: 0.540
   Length to Beam Ratio: 7.01 : 1
   'Natural speed' for length: 11.60 kts
   Power going to wave formation at top speed: 68 %
   Trim (Max stability = 0, Max steadiness = 100): 36
   Bow angle (Positive = bow angles forward): 11.30 degrees
   Stern overhang: 1.64 ft / 0.50 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      16.40 ft / 5.00 m
      - Forecastle (20 %):   15.75 ft / 4.80 m (16.08 ft / 4.90 m aft of break)
      - Mid (50 %):      15.75 ft / 4.80 m (7.87 ft / 2.40 m aft of break)
      - Quarterdeck (15 %):   7.87 ft / 2.40 m
      - Stern:      7.87 ft / 2.40 m
      - Average freeboard:   11.91 ft / 3.63 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 102.7 %
      - Above water (accommodation/working, high = better): 63.3 %
   Waterplane Area: 1,785 Square feet or 166 Square metres
   Displacement factor (Displacement / loading): 145 %
   Structure weight / hull surface area: 25 lbs/sq ft or 120 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.73
      - Longitudinal: 17.97
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   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

[Sachmle]

Little fat (BC 0.540) under the skirt. Could probably cut freeboard since seakeeping is 2.00

[Guinness]

Well, for an 18 knot ship, the hull doesn't need to be all that fine. This allows for a little bit reduced draft, which could be useful for the mission.

Freeboard was driven by providing ample internal volume via the long forecastle, not seakeeping.

[Jefgte]

Directly comming from the CTB1, transfered to Romania, Probably the final study.
14 ships in the class  - 7 in 1919H1 & 7 in 1919H2
In comparison with CTB1, freeboard increase & the speed decrease from 27 to 25kts
Misc is 16t for the minesweeping material.

200t, Peru PMCTB laid down 1919 (Engine 1916)

Displacement:
   200 t light; 206 t standard; 227 t normal; 244 t full load

Dimensions: Length overall / water x beam x draught
   178.31 ft / 177.17 ft x 16.88 ft x 6.73 ft (normal load)
   54.35 m / 54.00 m x 5.15 m  x 2.05 m

Armament:
     1 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1919 Model
     Quick firing gun in deck mount
     on centreline forward
     2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1919 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 14 lbs / 6 kg
   Shells per gun, main battery: 150
   2 - 18.0" / 457.2 mm above water torpedoes

Armour:
  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.79" / 20 mm         -               -
   2nd:   0.50" / 13 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 1 shaft, 4 800 shp / 3 581 Kw = 25.00 kts
   Range 2 000nm at 12.00 kts
   Bunker at max displacement = 39 tons

Complement:
   29 - 38

Cost:
   £0.052 million / $0.210 million

Distribution of weights at normal displacement:
   Armament: 2 tons, 0.8 %
   Armour: 1 tons, 0.6 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 1 tons, 0.6 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 111 tons, 49.1 %
   Hull, fittings & equipment: 69 tons, 30.6 %
   Fuel, ammunition & stores: 27 tons, 12.0 %
   Miscellaneous weights: 16 tons, 7.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     67 lbs / 30 Kg = 4.9 x 3.0 " / 76 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 0.4 ft / 0.1 m
   Roll period: 11.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.13
   Seaboat quality  (Average = 1.00): 1.13

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.395
   Length to Beam Ratio: 10.50 : 1
   'Natural speed' for length: 13.31 kts
   Power going to wave formation at top speed: 67 %
   Trim (Max stability = 0, Max steadiness = 100): 63
   Bow angle (Positive = bow angles forward): 5.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      13.12 ft / 4.00 m
      - Forecastle (18 %):   10.50 ft / 3.20 m
      - Mid (40 %):      7.87 ft / 2.40 m
      - Quarterdeck (15 %):   7.22 ft / 2.20 m
      - Stern:      6.56 ft / 2.00 m
      - Average freeboard:   8.53 ft / 2.60 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 171.9 %
      - Above water (accommodation/working, high = better): 60.9 %
   Waterplane Area: 1 735 Square feet or 161 Square metres
   Displacement factor (Displacement / loading): 58 %
   Structure weight / hull surface area: 16 lbs/sq ft or 80 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 3.14
      - Overall: 0.60
   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

3150nm at 10kts
2000nm at 12kts
680nm at 18kts
430nm at 21kts
245nm at 25kts

[Jefgte]

200t, Peru CTBM laid down 1919 (Engine 1916)

Displacement:
   200 t light; 206 t standard; 228 t normal; 245 t full load

Dimensions: Length overall / water x beam x draught
   178.31 ft / 177.17 ft x 16.88 ft x 6.74 ft (normal load)
   54.35 m / 54.00 m x 5.15 m  x 2.06 m

Armament:
     1 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1919 Model
     Quick firing gun in deck mount
     on centreline forward
     2 - 1.57" / 40.0 mm guns (1x2 guns), 1.95lbs / 0.88kg shells, 1919 Model
     Anti-aircraft guns in deck mount
     on centreline aft, all raised guns - superfiring
     2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1919 Model
     Machine guns in deck mounts
     on side, all amidships
   Weight of broadside 18 lbs / 8 kg
   Shells per gun, main battery: 150
   2 - 18.0" / 457.2 mm above water torpedoes

Armour:
  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.79" / 20 mm         -               -
   2nd:   0.50" / 13 mm         -               -
   3rd:   0.50" / 13 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 1 shaft, 4 800 shp / 3 581 Kw = 25.00 kts
   Range 245nm at 25.00 kts
   Bunker at max displacement = 39 tons

Complement:
   29 - 38

Cost:
   £0.053 million / $0.213 million

Distribution of weights at normal displacement:
   Armament: 2 tons, 1.0 %
   Armour: 2 tons, 0.7 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 2 tons, 0.7 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 111 tons, 48.7 %
   Hull, fittings & equipment: 70 tons, 30.8 %
   Fuel, ammunition & stores: 28 tons, 12.3 %
   Miscellaneous weights: 15 tons, 6.6 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     67 lbs / 30 Kg = 4.9 x 3.0 " / 76 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 0.4 ft / 0.1 m
   Roll period: 11.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.17
   Seaboat quality  (Average = 1.00): 1.13

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.395
   Length to Beam Ratio: 10.50 : 1
   'Natural speed' for length: 13.31 kts
   Power going to wave formation at top speed: 67 %
   Trim (Max stability = 0, Max steadiness = 100): 63
   Bow angle (Positive = bow angles forward): 5.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      13.12 ft / 4.00 m
      - Forecastle (18 %):   10.50 ft / 3.20 m
      - Mid (40 %):      7.87 ft / 2.40 m
      - Quarterdeck (15 %):   7.22 ft / 2.20 m
      - Stern:      6.56 ft / 2.00 m
      - Average freeboard:   8.53 ft / 2.60 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 172.0 %
      - Above water (accommodation/working, high = better): 60.9 %
   Waterplane Area: 1 735 Square feet or 161 Square metres
   Displacement factor (Displacement / loading): 58 %
   Structure weight / hull surface area: 16 lbs/sq ft or 80 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 3.15
      - Overall: 0.60
   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

3150nm at 10kts
2000nm at 12kts
680nm at 18kts
430nm at 21kts
245nm at 25kts

[Jefgte]

The BB Islas Malvinas"ll enter in Rosario DD 1919H1 to change engines

Rebuilt Islas Malvinas
Was - 1919H1
18266tl - 21898tfl
Old Engines: 30591shp : 1391t
To scrapp: 208t + 0.21BP + 0.21$
Fuel: 2677t
Scrapp cost to1919H2: +0.21$ & +0.21BP

Rebuilt in 1919H2:
18800tl – 21678tfl
New Engines: 60000shp : 2235t
Fuel: 2033t
Calculation:
Rebuilt Package: 4.57$ + 1.84BP
2235t : 2.235BP – 4.47$ + 2.24BP
rebuild cost: 9.04$ & 4.08BP
----------------------

Islas Malvinas (Ex-Isla de Pascua), NUS Battleship laid down 1909

Displacement:
   18 276 t light; 19 221 t standard; 20 708 t normal; 21 898 t full load

Dimensions: Length overall / water x beam x draught
   557.00 ft / 557.00 ft x 92.00 ft x 26.00 ft (normal load)
   169.77 m / 169.77 m x 28.04 m  x 7.92 m

Armament:
      6 - 12.00" / 305 mm guns (3x2 guns), 1 045.00lbs / 474.00kg shells, 1911 Model
     Breech loading guns in turrets (on barbettes)
     on centreline, evenly spread
     Aft Main mounts separated by engine room
      14 - 6.00" / 152 mm guns in single mounts, 100.00lbs / 45.36kg shells, 1905 Model
     Breech loading guns in casemate mounts
     on side, evenly spread
     14 guns in hull casemates - Limited use in heavy seas
      18 - 4.00" / 102 mm guns in single mounts, 30.00lbs / 13.61kg shells, 1906 Model
     Quick firing guns in casemate mounts
     on side, evenly spread
     8 guns in hull casemates - Limited use in heavy seas
      6 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1905 Model
     Quick firing guns in deck mounts
     on centreline, evenly spread, all raised mounts
   Weight of broadside 8 291 lbs / 3 761 kg
   Shells per gun, main battery: 110

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12.0" / 305 mm   390.00 ft / 118.87 m   12.00 ft / 3.66 m
   Ends:   4.00" / 102 mm   167.00 ft / 50.90 m   10.00 ft / 3.05 m
   Upper:   8.00" / 203 mm   390.00 ft / 118.87 m   8.00 ft / 2.44 m
     Main Belt covers 108 % of normal length

   - Torpedo Bulkhead:
      1.50" / 38 mm   410.00 ft / 124.97 m   31.00 ft / 9.45 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13.0" / 330 mm   8.00" / 203 mm      11.0" / 279 mm
   2nd:   4.00" / 102 mm   2.00" / 51 mm      1.00" / 25 mm
   3rd:   4.00" / 102 mm   2.00" / 51 mm      1.00" / 25 mm

   - Armour deck: 2.50" / 64 mm, Conning tower: 11.00" / 279 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 3 shafts, 30 591 shp / 22 821 Kw = 21.50 kts
   Range 7 000nm at 12.00 kts
   Bunker at max displacement = 2 677 tons

Complement:
   863 - 1 122

Cost:
   £1.606 million / $6.426 million

Distribution of weights at normal displacement:
   Armament: 919 tons, 4.4 %
   Armour: 8 014 tons, 38.7 %
      - Belts: 3 740 tons, 18.1 %
      - Torpedo bulkhead: 705 tons, 3.4 %
      - Armament: 1 745 tons, 8.4 %
      - Armour Deck: 1 645 tons, 7.9 %
      - Conning Tower: 179 tons, 0.9 %
   Machinery: 1 391 tons, 6.7 %
   Hull, fittings & equipment: 7 553 tons, 36.5 %
   Fuel, ammunition & stores: 2 432 tons, 11.7 %
   Miscellaneous weights: 400 tons, 1.9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     40 089 lbs / 18 184 Kg = 46.4 x 12.0 " / 305 mm shells or 7.6 torpedoes
   Stability (Unstable if below 1.00): 1.29
   Metacentric height 7.0 ft / 2.1 m
   Roll period: 14.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.38
   Seaboat quality  (Average = 1.00): 1.76

Hull form characteristics:
   Hull has raised forecastle
   Block coefficient: 0.544
   Length to Beam Ratio: 6.05 : 1
   'Natural speed' for length: 23.60 kts
   Power going to wave formation at top speed: 45 %
   Trim (Max stability = 0, Max steadiness = 100): 40
   Bow angle (Positive = bow angles forward): -5.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      23.00 ft / 7.01 m
      - Forecastle (15 %):   22.00 ft / 6.71 m (21.00 ft / 6.40 m aft of break)
      - Mid (60 %):      20.00 ft / 6.10 m
      - Quarterdeck (15 %):   20.00 ft / 6.10 m
      - Stern:      20.00 ft / 6.10 m
      - Average freeboard:   20.59 ft / 6.27 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 74.8 %
      - Above water (accommodation/working, high = better): 159.5 %
   Waterplane Area: 35 562 Square feet or 3 304 Square metres
   Displacement factor (Displacement / loading): 112 %
   Structure weight / hull surface area: 152 lbs/sq ft or 744 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.94
      - Longitudinal: 1.81
      - 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 as follows:
-250t FC
-50t Flag facilities
-25t W/T
-50t Crew Comfort measures
-25t Weight Reserve
--------------------------------------
Rebuilt in 1919H1 & H2
Islas Malvinas (Ex-Isla de Pascua), NUS Battleship laid down 1909 (Engine 1916)

Displacement:
   18 800 t light; 19 667 t standard; 20 784 t normal; 21 678 t full load

Dimensions: Length overall / water x beam x draught
   557.00 ft / 557.00 ft x 92.00 ft x 26.10 ft (normal load)
   169.77 m / 169.77 m x 28.04 m  x 7.95 m

Armament:
      6 - 12.00" / 305 mm guns (3x2 guns), 864.00lbs / 391.90kg shells, 1911 Model
     Breech loading guns in turrets (on barbettes)
     on centreline, evenly spread
     Aft Main mounts separated by engine room
      14 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1905 Model
     Breech loading guns in casemate mounts
     on side, evenly spread
     14 guns in hull casemates - Limited use in heavy seas
      10 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1906 Model
     Quick firing guns in casemate mounts
     on side, evenly spread
      12 - 1.57" / 40.0 mm guns (6x2 guns), 1.95lbs / 0.88kg shells, 1916 Model
     Anti-aircraft guns in deck mounts
     on centreline, evenly spread, all raised mounts
      4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1909 Model
     Machine guns in deck mounts
     on side ends, evenly spread, all raised mounts - superfiring
   Weight of broadside 7 040 lbs / 3 193 kg
   Shells per gun, main battery: 110

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   12.0" / 305 mm   390.00 ft / 118.87 m   12.00 ft / 3.66 m
   Ends:   4.00" / 102 mm   167.00 ft / 50.90 m   10.00 ft / 3.05 m
   Upper:   8.00" / 203 mm   390.00 ft / 118.87 m   8.00 ft / 2.44 m
     Main Belt covers 108 % of normal length

   - Torpedo Bulkhead:
      1.50" / 38 mm   410.00 ft / 124.97 m   31.00 ft / 9.45 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13.0" / 330 mm   8.00" / 203 mm      11.0" / 279 mm
   2nd:   4.00" / 102 mm   2.00" / 51 mm      1.00" / 25 mm
   3rd:   4.00" / 102 mm   2.00" / 51 mm      1.00" / 25 mm

   - Armour deck: 2.50" / 64 mm, Conning tower: 11.00" / 279 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 3 shafts, 60 000 shp / 44 760 Kw = 25.53 kts
   Range 7 000nm at 12.00 kts
   Bunker at max displacement = 2 010 tons

Complement:
   865 - 1 125

Cost:
   £1.710 million / $6.841 million

Distribution of weights at normal displacement:
   Armament: 880 tons, 4.2 %
   Armour: 7 929 tons, 38.1 %
      - Belts: 3 740 tons, 18.0 %
      - Torpedo bulkhead: 705 tons, 3.4 %
      - Armament: 1 660 tons, 8.0 %
      - Armour Deck: 1 645 tons, 7.9 %
      - Conning Tower: 179 tons, 0.9 %
   Machinery: 2 235 tons, 10.8 %
   Hull, fittings & equipment: 7 356 tons, 35.4 %
   Fuel, ammunition & stores: 1 984 tons, 9.5 %
   Miscellaneous weights: 400 tons, 1.9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     31 523 lbs / 14 299 Kg = 36.5 x 12.0 " / 305 mm shells or 5.7 torpedoes
   Stability (Unstable if below 1.00): 1.14
   Metacentric height 5.7 ft / 1.7 m
   Roll period: 16.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.36
   Seaboat quality  (Average = 1.00): 1.19

Hull form characteristics:
   Hull has raised forecastle
   Block coefficient: 0.544
   Length to Beam Ratio: 6.05 : 1
   'Natural speed' for length: 23.60 kts
   Power going to wave formation at top speed: 54 %
   Trim (Max stability = 0, Max steadiness = 100): 59
   Bow angle (Positive = bow angles forward): -5.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      22.90 ft / 6.98 m
      - Forecastle (15 %):   21.02 ft / 6.41 m (20.02 ft / 6.10 m aft of break)
      - Mid (60 %):      19.90 ft / 6.07 m
      - Quarterdeck (15 %):   19.90 ft / 6.07 m
      - Stern:      19.90 ft / 6.07 m
      - Average freeboard:   20.21 ft / 6.16 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 89.0 %
      - Above water (accommodation/working, high = better): 156.1 %
   Waterplane Area: 35 562 Square feet or 3 304 Square metres
   Displacement factor (Displacement / loading): 105 %
   Structure weight / hull surface area: 149 lbs/sq ft or 727 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.70
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform

Misc Weight as follows:
-250t FC
-50t Flag facilities
-25t W/T
-50t Crew Comfort measures
-25t Weight Reserve

[Jefgte]

Increase the speed from 24 to 27kts of the AC Bariloche class is in the NUS plan in 1921

Refurbishment Bariloche ACs class
Was in 1921H1
9474tl – 12671tfl
Old engines; 32231SHP – 1596t
To scrapp:1596tx0.15=239.4T » BP0.24 » $0.24
Coal : 2659T
Repport to 1921H2 » +BP0.24 » +$0.24

Refurbishment to 1921H2
9845tl – 12072tfl
Calculation
9474t/1000x0.2=BP 0.9474 BP & $2.46
New engines : 1816t  » BP1.816 »$3.632
Total cost: BP 2.76 & $ 6.092


As built:
UNS San Carlos de Bariloche, Naciones Unidas Cruiser laid down 1910 (Engine 1909)

Displacement:
   9 474 t light; 10 012 t standard; 11 489 t normal; 12 671 t full load

Dimensions: Length overall / water x beam x draught
   533.00 ft / 529.00 ft x 56.00 ft x 22.00 ft (normal load)
   162.46 m / 161.24 m x 17.07 m  x 6.71 m

Armament:
      6 - 9.20" / 234 mm guns (3x2 guns), 380.00lbs / 172.37kg shells, 1910 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, majority aft
      8 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1906 Model
     Quick firing guns in casemate mounts
     on side, all forward
     8 guns in hull casemates - Limited use in heavy seas
      4 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1905 Model
     Quick firing guns in deck mounts
     on side, evenly spread
   Weight of broadside 3 198 lbs / 1 451 kg
   Shells per gun, main battery: 165

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   8.00" / 203 mm   320.00 ft / 97.54 m   14.00 ft / 4.27 m
   Ends:   1.00" / 25 mm   209.00 ft / 63.70 m   14.00 ft / 4.27 m
   Upper:   4.00" / 102 mm   320.00 ft / 97.54 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:   8.00" / 203 mm   6.00" / 152 mm      8.00" / 203 mm
   2nd:   4.00" / 102 mm   2.00" / 51 mm      1.00" / 25 mm
   3rd:   1.00" / 25 mm   1.00" / 25 mm            -

   - Armour deck: 1.50" / 38 mm, Conning tower: 6.00" / 152 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 32 231 shp / 24 045 Kw = 24.00 kts
   Range 7 500nm at 12.00 kts
   Bunker at max displacement = 2 659 tons (90% coal)

Complement:
   554 - 721

Cost:
   £0.897 million / $3.587 million

Distribution of weights at normal displacement:
   Armament: 407 tons, 3.5 %
   Armour: 3 531 tons, 30.7 %
      - Belts: 2 068 tons, 18.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 786 tons, 6.8 %
      - Armour Deck: 611 tons, 5.3 %
      - Conning Tower: 66 tons, 0.6 %
   Machinery: 1 596 tons, 13.9 %
   Hull, fittings & equipment: 3 816 tons, 33.2 %
   Fuel, ammunition & stores: 2 015 tons, 17.5 %
   Miscellaneous weights: 125 tons, 1.1 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     16 833 lbs / 7 635 Kg = 43.2 x 9.2 " / 234 mm shells or 2.1 torpedoes
   Stability (Unstable if below 1.00): 1.13
   Metacentric height 2.6 ft / 0.8 m
   Roll period: 14.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.87
   Seaboat quality  (Average = 1.00): 1.59

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.617
   Length to Beam Ratio: 9.45 : 1
   'Natural speed' for length: 23.00 kts
   Power going to wave formation at top speed: 48 %
   Trim (Max stability = 0, Max steadiness = 100): 44
   Bow angle (Positive = bow angles forward): -5.00 degrees
   Stern overhang: 4.00 ft / 1.22 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      23.00 ft / 7.01 m
      - Forecastle (20 %):   23.00 ft / 7.01 m
      - Mid (55 %):      23.00 ft / 7.01 m (15.00 ft / 4.57 m aft of break)
      - Quarterdeck (15 %):   15.00 ft / 4.57 m
      - Stern:      15.00 ft / 4.57 m
      - Average freeboard:   19.40 ft / 5.91 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 74.6 %
      - Above water (accommodation/working, high = better): 146.1 %
   Waterplane Area: 22 013 Square feet or 2 045 Square metres
   Displacement factor (Displacement / loading): 114 %
   Structure weight / hull surface area: 105 lbs/sq ft or 513 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.95
      - Longitudinal: 1.57
      - 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

25 tons for Marconi
100 tons reserve weight

------------------------
& the rebuilt with 52000SHP

UNS San Carlos de Bariloche, Naciones Unidas Cruiser laid down 1910 (Engine 1920)

Displacement:
   9 845 t light; 10 380 t standard; 11 320 t normal; 12 072 t full load

Dimensions: Length overall / water x beam x draught
   533.00 ft / 529.00 ft x 56.00 ft x 21.68 ft (normal load)
   162.46 m / 161.24 m x 17.07 m  x 6.61 m

Armament:
      6 - 9.20" / 234 mm guns (3x2 guns), 389.34lbs / 176.60kg shells, 1910 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, majority aft
      8 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1906 Model
     Quick firing guns in casemate mounts
     on side, all forward
     8 guns in hull casemates - Limited use in heavy seas
      8 - 1.57" / 40.0 mm guns (4x2 guns), 1.95lbs / 0.88kg shells, 1905 Model
     Quick firing guns in deck mounts
     on side, evenly spread
   Weight of broadside 3 216 lbs / 1 459 kg
   Shells per gun, main battery: 165
   6 - 21.0" / 533.4 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   8.00" / 203 mm   320.00 ft / 97.54 m   14.00 ft / 4.27 m
   Ends:   1.00" / 25 mm   209.00 ft / 63.70 m   14.00 ft / 4.27 m
   Upper:   4.00" / 102 mm   320.00 ft / 97.54 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:   8.00" / 203 mm   6.00" / 152 mm      8.00" / 203 mm
   2nd:   4.00" / 102 mm   2.00" / 51 mm      1.00" / 25 mm
   3rd:   1.00" / 25 mm   1.00" / 25 mm            -

   - Armour deck: 1.50" / 38 mm, Conning tower: 6.00" / 152 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 52 000 shp / 38 792 Kw = 27.15 kts
   Range 10 000nm at 12.00 kts
   Bunker at max displacement = 1 692 tons

Complement:
   548 - 713

Cost:
   £0.937 million / $3.747 million

Distribution of weights at normal displacement:
   Armament: 402 tons, 3.6 %
   Armour: 3 535 tons, 31.2 %
      - Belts: 2 068 tons, 18.3 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 792 tons, 7.0 %
      - Armour Deck: 611 tons, 5.4 %
      - Conning Tower: 65 tons, 0.6 %
   Machinery: 1 818 tons, 16.1 %
   Hull, fittings & equipment: 3 869 tons, 34.2 %
   Fuel, ammunition & stores: 1 475 tons, 13.0 %
   Miscellaneous weights: 220 tons, 1.9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     14 995 lbs / 6 802 Kg = 38.5 x 9.2 " / 234 mm shells or 1.9 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 2.5 ft / 0.8 m
   Roll period: 14.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 54 %
         - Recoil effect (Restricted arc if above 1.00): 0.82
   Seaboat quality  (Average = 1.00): 1.23

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.617
   Length to Beam Ratio: 9.45 : 1
   'Natural speed' for length: 23.00 kts
   Power going to wave formation at top speed: 55 %
   Trim (Max stability = 0, Max steadiness = 100): 44
   Bow angle (Positive = bow angles forward): -5.00 degrees
   Stern overhang: 4.00 ft / 1.22 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      23.33 ft / 7.11 m
      - Forecastle (20 %):   23.33 ft / 7.11 m
      - Mid (55 %):      23.33 ft / 7.11 m (15.33 ft / 4.67 m aft of break)
      - Quarterdeck (15 %):   15.33 ft / 4.67 m
      - Stern:      15.33 ft / 4.67 m
      - Average freeboard:   19.73 ft / 6.01 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 82.5 %
      - Above water (accommodation/working, high = better): 129.3 %
   Waterplane Area: 22 013 Square feet or 2 045 Square metres
   Displacement factor (Displacement / loading): 107 %
   Structure weight / hull surface area: 106 lbs/sq ft or 517 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.94
      - Longitudinal: 1.62
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is excellent
   Good seaboat, rides out heavy weather easily

25 tons for Marconi
200 tons reserve weight
 

[Jefgte]

Testing a River Patrol Boat for using on the Rio Parana River.


25T, NUS RPB laid down 1919

Displacement:
   25 t light; 26 t standard; 27 t normal; 28 t full load

Dimensions: Length overall / water x beam x draught
   65.62 ft / 65.62 ft x 13.12 ft x 2.21 ft (normal load)
   20.00 m / 20.00 m x 4.00 m  x 0.67 m

Armament:
      1 - 2.00" / 50.8 mm guns in single mounts, 4.00lbs / 1.81kg shells, 1919 Model
     Quick firing gun in deck mount
     on centreline forward
      3 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1919 Model
     Machine guns in deck mounts
     on centreline, evenly spread
   Weight of broadside 4 lbs / 2 kg
   Shells per gun, main battery: 300

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.50" / 13 mm         -               -
   2nd:   0.50" / 13 mm         -               -

Machinery:
   Petrol Internal combustion motors,
   Geared drive, 2 shafts, 120 shp / 90 Kw = 12.02 kts
   Range 1 000nm at 6.00 kts
   Bunker at max displacement = 1 tons

Complement:
   5 - 7

Cost:
   £0.004 million / $0.017 million

Distribution of weights at normal displacement:
   Armament: 1 tons, 1.9 %
   Armour: 1 tons, 2.1 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 1 tons, 2.1 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 4 tons, 15.7 %
   Hull, fittings & equipment: 14 tons, 50.8 %
   Fuel, ammunition & stores: 2 tons, 7.3 %
   Miscellaneous weights: 6 tons, 22.1 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     64 lbs / 29 Kg = 15.9 x 2.0 " / 51 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 0.3 ft / 0.1 m
   Roll period: 10.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.09
   Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.500
   Length to Beam Ratio: 5.00 : 1
   'Natural speed' for length: 8.10 kts
   Power going to wave formation at top speed: 65 %
   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 (% = measuring location as a percentage of overall length):
      - Stem:      6.56 ft / 2.00 m
      - Forecastle (15 %):   6.00 ft / 1.83 m
      - Mid (40 %):      5.25 ft / 1.60 m
      - Quarterdeck (15 %):   4.59 ft / 1.40 m
      - Stern:      4.59 ft / 1.40 m
      - Average freeboard:   5.24 ft / 1.60 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 91.8 %
      - Above water (accommodation/working, high = better): 113.1 %
   Waterplane Area: 574 Square feet or 53 Square metres
   Displacement factor (Displacement / loading): 141 %
   Structure weight / hull surface area: 15 lbs/sq ft or 73 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.80
      - Longitudinal: 7.03
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is adequate

[Jefgte]

To work with the 2xR100PB on the Parana

40T, NUS Parana PB laid down 1919

Displacement:
   40 t light; 41 t standard; 51 t normal; 59 t full load

Dimensions: Length overall / water x beam x draught
   82.02 ft / 82.02 ft x 12.14 ft x 3.61 ft (normal load)
   25.00 m / 25.00 m x 3.70 m  x 1.10 m

Armament:
      1 - 2.00" / 50.8 mm guns in single mounts, 4.00lbs / 1.81kg shells, 1919 Model
     Quick firing gun in deck mount
     on centreline forward
      2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1919 Model
     Machine guns in deck mounts
     on centreline, evenly spread
   Weight of broadside 4 lbs / 2 kg
   Shells per gun, main battery: 180

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.50" / 13 mm         -               -
   2nd:   0.50" / 13 mm         -               -

Machinery:
   Petrol Internal combustion motors,
   Geared drive, 2 shafts, 378 shp / 282 Kw = 15.00 kts
   Range 2 000nm at 12.00 kts
   Bunker at max displacement = 18 tons

Complement:
   9 - 12

Cost:
   £0.008 million / $0.032 million

Distribution of weights at normal displacement:
   Armament: 1 tons, 1.0 %
   Armour: 1 tons, 1.1 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 1 tons, 1.1 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 13 tons, 26.1 %
   Hull, fittings & equipment: 22 tons, 42.9 %
   Fuel, ammunition & stores: 11 tons, 22.1 %
   Miscellaneous weights: 4 tons, 6.8 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     85 lbs / 38 Kg = 21.2 x 2.0 " / 51 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 0.3 ft / 0.1 m
   Roll period: 10.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 67 %
         - Recoil effect (Restricted arc if above 1.00): 0.12
   Seaboat quality  (Average = 1.00): 1.20

Hull form characteristics:
   Hull has low forecastle
   Block coefficient: 0.500
   Length to Beam Ratio: 6.76 : 1
   'Natural speed' for length: 9.06 kts
   Power going to wave formation at top speed: 69 %
   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:      7.55 ft / 2.30 m
      - Forecastle (15 %):   6.23 ft / 1.90 m (6.56 ft / 2.00 m aft of break)
      - Mid (40 %):      5.91 ft / 1.80 m
      - Quarterdeck (15 %):   5.58 ft / 1.70 m
      - Stern:      5.58 ft / 1.70 m
      - Average freeboard:   5.99 ft / 1.83 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 100.5 %
      - Above water (accommodation/working, high = better): 83.1 %
   Waterplane Area: 663 Square feet or 62 Square metres
   Displacement factor (Displacement / loading): 147 %
   Structure weight / hull surface area: 16 lbs/sq ft or 77 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.79
      - Longitudinal: 8.31
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is cramped
   Good seaboat, rides out heavy weather easily

[Nobody]

... laid down 1919

Did you already finish the 1917/1920 engine tech in 1919/H1?
Otherwise this should be "engine year 1916" - although this might change nothing.

[Jefgte]

 ???

Engines modifs & small adjusetments

40T, NUS Parana PB laid down 1919 (Engine 1916)

Displacement:
   40 t light; 42 t standard; 53 t normal; 62 t full load

Dimensions: Length overall / water x beam x draught
   82.02 ft / 82.02 ft x 12.14 ft x 3.71 ft (normal load)
   25.00 m / 25.00 m x 3.70 m  x 1.13 m

Armament:
      1 - 2.00" / 50.8 mm guns in single mounts, 4.00lbs / 1.81kg shells, 1919 Model
     Quick firing gun in deck mount
     on centreline forward
      2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1919 Model
     Machine guns in deck mounts
     on centreline, evenly spread
   Weight of broadside 4 lbs / 2 kg
   Shells per gun, main battery: 200

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.50" / 13 mm         -               -
   2nd:   0.50" / 13 mm         -               -

Machinery:
   Petrol Internal combustion motors,
   Geared drive, 2 shafts, 380 shp / 283 Kw = 14.97 kts
   Range 2 000nm at 12.00 kts
   Bunker at max displacement = 20 tons

Complement:
   9 - 12

Cost:
   £0.008 million / $0.033 million

Distribution of weights at normal displacement:
   Armament: 1 tons, 1.0 %
   Armour: 1 tons, 1.1 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 1 tons, 1.1 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 14 tons, 26.8 %
   Hull, fittings & equipment: 22 tons, 41.4 %
   Fuel, ammunition & stores: 13 tons, 24.1 %
   Miscellaneous weights: 3 tons, 5.7 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     83 lbs / 37 Kg = 20.7 x 2.0 " / 51 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.11
   Metacentric height 0.3 ft / 0.1 m
   Roll period: 10.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.12
   Seaboat quality  (Average = 1.00): 1.16

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.500
   Length to Beam Ratio: 6.76 : 1
   'Natural speed' for length: 9.06 kts
   Power going to wave formation at top speed: 69 %
   Trim (Max stability = 0, Max steadiness = 100): 60
   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:      7.38 ft / 2.25 m
      - Forecastle (15 %):   6.40 ft / 1.95 m
      - Mid (40 %):      5.74 ft / 1.75 m
      - Quarterdeck (15 %):   5.41 ft / 1.65 m
      - Stern:      5.41 ft / 1.65 m
      - Average freeboard:   5.86 ft / 1.79 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 101.5 %
      - Above water (accommodation/working, high = better): 80.8 %
   Waterplane Area: 663 Square feet or 62 Square metres
   Displacement factor (Displacement / loading): 146 %
   Structure weight / hull surface area: 16 lbs/sq ft or 78 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.80
      - Longitudinal: 7.64
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is cramped
   Ship has slow, easy roll, a good, steady gun platform

[Jefgte]

To protect Buenos Aires & the Rio De La Plata, I study a light Costal DD.

Buenos Aires, NUS CTB laid down 1919 (Engine 1916)

Displacement:
   500 t light; 533 t standard; 572 t normal; 603 t full load

Dimensions: Length overall / water x beam x draught
   229.66 ft / 229.66 ft x 26.25 ft x 7.91 ft (normal load)
   70.00 m / 70.00 m x 8.00 m  x 2.41 m

Armament:
      4 - 4.02" / 102 mm guns (2x2 guns), 32.38lbs / 14.69kg shells, 1919 Model
     Breech loading guns in deck mounts with hoists
     on centreline, evenly spread
      4 - 1.57" / 40.0 mm guns (2x2 guns), 1.95lbs / 0.88kg shells, 1919 Model
     Breech loading guns in deck mounts
     on centreline, evenly spread, all raised mounts
      4 - 1.57" / 40.0 mm guns (2x2 guns), 1.95lbs / 0.89kg shells, 1919 Model
     Breech loading guns in deck mounts
     on centreline, all amidships, all raised mounts - superfiring
   Weight of broadside 145 lbs / 66 kg
   Shells per gun, main battery: 250
   6 - 18.0" / 457.2 mm above water torpedoes

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.51" / 13 mm         -               -
   2nd:   0.51" / 13 mm         -               -
   3rd:   0.51" / 13 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 8 000 shp / 5 968 Kw = 25.15 kts
   Range 300nm at 24.00 kts
   Bunker at max displacement = 70 tons

Complement:
   58 - 76

Cost:
   £0.139 million / $0.558 million

Distribution of weights at normal displacement:
   Armament: 18 tons, 3.2 %
   Armour: 6 tons, 1.1 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 6 tons, 1.1 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 222 tons, 38.9 %
   Hull, fittings & equipment: 203 tons, 35.6 %
   Fuel, ammunition & stores: 72 tons, 12.5 %
   Miscellaneous weights: 50 tons, 8.7 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     218 lbs / 99 Kg = 6.7 x 4.0 " / 102 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 0.8 ft / 0.2 m
   Roll period: 12.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.70
   Seaboat quality  (Average = 1.00): 1.21

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.420
   Length to Beam Ratio: 8.75 : 1
   'Natural speed' for length: 15.15 kts
   Power going to wave formation at top speed: 65 %
   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 (% = measuring location as a percentage of overall length):
      - Stem:      14.44 ft / 4.40 m
      - Forecastle (20 %):   12.47 ft / 3.80 m
      - Mid (50 %):      11.81 ft / 3.60 m
      - Quarterdeck (18 %):   10.50 ft / 3.20 m
      - Stern:      9.84 ft / 3.00 m
      - Average freeboard:   11.69 ft / 3.56 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 161.2 %
      - Above water (accommodation/working, high = better): 71.2 %
   Waterplane Area: 3 758 Square feet or 349 Square metres
   Displacement factor (Displacement / loading): 72 %
   Structure weight / hull surface area: 28 lbs/sq ft or 134 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 2.83
      - Overall: 0.59
   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
   Good seaboat, rides out heavy weather easily

[Jefgte]

16 CTBMs in project.

200t, NUS-Atlantic CTBM laid down 1919 (Engine 1916)

Displacement:
   200 t light; 208 t standard; 229 t normal; 247 t full load

Dimensions: Length overall / water x beam x draught
   180.51 ft / 177.17 ft x 16.80 ft x 6.77 ft (normal load)
   55.02 m / 54.00 m x 5.12 m  x 2.07 m

Armament:
     1 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1919 Model
     Quick firing gun in deck mount
     on centreline forward
     4 - 1.57" / 40.0 mm guns (2x2 guns), 1.95lbs / 0.88kg shells, 1919 Model
     Anti-aircraft guns in deck mounts
     on centreline, evenly spread, all raised mounts
     2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1919 Model
     Machine guns in deck mounts
     on side, all amidships
   Weight of broadside 21 lbs / 10 kg
   Shells per gun, main battery: 180
   2 - 18.0" / 457.2 mm above water torpedoes

Armour:
  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.79" / 20 mm         -               -
   2nd:   0.50" / 13 mm         -               -
   3rd:   0.50" / 13 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 1 shaft, 4 800 shp / 3 581 Kw = 24.96 kts
   Range 2 000nm at 12.00 kts
   Bunker at max displacement = 39 tons

Complement:
   29 - 38

Cost:
   £0.054 million / $0.216 million

Distribution of weights at normal displacement:
   Armament: 3 tons, 1.2 %
   Armour: 2 tons, 0.8 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 2 tons, 0.8 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 111 tons, 48.2 %
   Hull, fittings & equipment: 70 tons, 30.7 %
   Fuel, ammunition & stores: 29 tons, 12.6 %
   Miscellaneous weights: 15 tons, 6.5 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     66 lbs / 30 Kg = 4.9 x 3.0 " / 76 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 0.4 ft / 0.1 m
   Roll period: 11.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.22
   Seaboat quality  (Average = 1.00): 1.12

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.398
   Length to Beam Ratio: 10.55 : 1
   'Natural speed' for length: 13.31 kts
   Power going to wave formation at top speed: 67 %
   Trim (Max stability = 0, Max steadiness = 100): 63
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      12.47 ft / 3.80 m
      - Forecastle (18 %):   10.50 ft / 3.20 m
      - Mid (40 %):      7.87 ft / 2.40 m
      - Quarterdeck (15 %):   7.22 ft / 2.20 m
      - Stern:      6.56 ft / 2.00 m
      - Average freeboard:   8.48 ft / 2.59 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 172.2 %
      - Above water (accommodation/working, high = better): 60.6 %
   Waterplane Area: 1 730 Square feet or 161 Square metres
   Displacement factor (Displacement / loading): 58 %
   Structure weight / hull surface area: 17 lbs/sq ft or 81 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 3.11
      - Overall: 0.60
   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

3150nm at 10kts
2000nm at 12kts
680nm at 18kts
430nm at 21kts
245nm at 25kts
----------------------------
- short range wireless - 2t
- Marconi - 5t
- amunition climat control - 2t
+
- Minesweppers materials - 4t
- 6 depth charges - 2t
or
- 6 mines