Vilnius Union Ships, 1930+: The Good, The Bad, and the Unseaworthy

[The Rock Doctor]

A flush-deck version of the above - which I'm going with instead - looks like so.

I recognize the bow will obstruct close-range fire dead ahead, so be it. 

[The Rock Doctor]

Flush-deck version of the minelayer...


Enter ship name, Enter country Enter ship type laid down 1937

Displacement:
   2,999 t light; 3,147 t standard; 3,673 t normal; 4,094 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (460.25 ft / 445.87 ft) x 40.68 ft x (15.75 / 17.02 ft)
   (140.28 m / 135.90 m) x 12.40 m  x (4.80 / 5.19 m)

Armament:
      6 - 3.94" / 100 mm 45.0 cal guns - 30.78lbs / 13.96kg shells, 400 per gun
     Dual purpose guns in deck mounts, 1937 Model
     2 x 2-gun mounts on centreline, aft evenly spread
      1 raised mount aft
     1 x 2-gun mount on centreline, forward deck centre
      6 - 1.97" / 50.0 mm 60.0 cal guns - 4.19lbs / 1.90kg shells, 1,500 per gun
     Anti-air guns in deck mounts, 1937 Model
     2 x Twin mounts on sides, forward deck aft
     1 x Twin mount on centreline, forward deck centre
      1 raised mount
      8 - 0.98" / 25.0 mm 70.0 cal guns - 0.53lbs / 0.24kg shells, 5,000 per gun
     Machine guns in deck mounts, 1937 Model
     4 x Twin mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 214 lbs / 97 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.98" / 25 mm   0.12" / 3 mm            -
   2nd:   0.59" / 15 mm         -               -
   3rd:   0.59" / 15 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 56,301 shp / 42,000 Kw = 33.02 kts
   Range 8,000nm at 15.00 kts
   Bunker at max displacement = 947 tons

Complement:
   235 - 306

Cost:
   £1.827 million / $7.307 million

Distribution of weights at normal displacement:
   Armament: 43 tons, 1.2 %
      - Guns: 43 tons, 1.2 %
   Armour: 8 tons, 0.2 %
      - Armament: 8 tons, 0.2 %
   Machinery: 1,560 tons, 42.5 %
   Hull, fittings & equipment: 1,067 tons, 29.1 %
   Fuel, ammunition & stores: 673 tons, 18.3 %
   Miscellaneous weights: 320 tons, 8.7 %
      - Hull below water: 15 tons
      - Hull above water: 160 tons
      - On freeboard deck: 35 tons
      - Above deck: 110 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1,704 lbs / 773 Kg = 55.9 x 3.9 " / 100 mm shells or 0.5 torpedoes
   Stability (Unstable if below 1.00): 1.20
   Metacentric height 1.8 ft / 0.5 m
   Roll period: 12.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.12
   Seaboat quality  (Average = 1.00): 1.23

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.450 / 0.464
   Length to Beam Ratio: 10.96 : 1
   'Natural speed' for length: 21.12 kts
   Power going to wave formation at top speed: 61 %
   Trim (Max stability = 0, Max steadiness = 100): 57
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 5.91 ft / 1.80 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  23.29 ft / 7.10 m,  16.40 ft / 5.00 m
      - Forward deck:   30.00 %,  16.40 ft / 5.00 m,  16.40 ft / 5.00 m
      - Aft deck:   35.00 %,  16.40 ft / 5.00 m,  16.40 ft / 5.00 m
      - Quarter deck:   15.00 %,  16.40 ft / 5.00 m,  16.40 ft / 5.00 m
      - Average freeboard:      16.96 ft / 5.17 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 147.5 %
      - Above water (accommodation/working, high = better): 153.8 %
   Waterplane Area: 11,570 Square feet or 1,075 Square metres
   Displacement factor (Displacement / loading): 103 %
   Structure weight / hull surface area: 49 lbs/sq ft or 237 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.68
      - Longitudinal: 1.73
      - Overall: 0.75
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

10 NF
50 HS
25 WR
5 FC

970nm @ 33 knots
1300nm @ 30 knots

[The Rock Doctor]

New light cruiser to screen the Kirasjerzy class armored cruisers.  It's possible I'll extend the run to add escorts for the two Zuraw class carriers which are or will be building.

Realistically, I should have started these a year earlier to match up completion dates, but for now I guess the first two ACs will get a year or so of escorting from Ogun class ships.

Compared to earlier eight-gun ACs, there is the transom stern, a heavier belt and barbette, and more bunkerage to keep pace with the ACs.  A bit more light AA and weight reserve as well.  Seakeeping was a consideration, given that these guys will probably spend a fair chunk of time running around the Atlantic.


Enter ship name, Enter country Enter ship type laid down 1937

Displacement:
    8,846 t light; 9,307 t standard; 10,592 t normal; 11,620 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
    (605.62 ft / 590.55 ft) x 59.06 ft x (23.62 / 25.20 ft)
    (184.59 m / 180.00 m) x 18.00 m  x (7.20 / 7.68 m)

Armament:
      8 - 5.91" / 150 mm 50.0 cal guns - 121.25lbs / 55.00kg shells, 250 per gun
      Quick firing guns in turret on barbette mounts, 1937 Model
      4 x 2-gun mounts on centreline ends, evenly spread
        2 raised mounts - superfiring
      8 - 3.94" / 100 mm 45.0 cal guns - 30.77lbs / 13.96kg shells, 400 per gun
      Anti-air guns in deck mounts, 1937 Model
      4 x Twin mounts on side ends, evenly spread
      12 - 1.97" / 50.0 mm 60.0 cal guns - 4.18lbs / 1.89kg shells, 1,500 per gun
      Anti-air guns in deck mounts, 1937 Model
      6 x Twin mounts on sides, evenly spread
      12 - 0.98" / 25.0 mm 70.0 cal guns - 0.53lbs / 0.24kg shells, 5,000 per gun
      Machine guns in deck mounts, 1937 Model
      4 x Twin mounts on sides, evenly spread
        4 raised mounts
      4 x Single mounts on sides, evenly spread
      Weight of broadside 1,273 lbs / 577 kg

Armour:
  - Belts:        Width (max)    Length (avg)        Height (avg)
    Main:    5.12" / 130 mm    383.86 ft / 117.00 m    16.37 ft / 4.99 m
    Ends:    Unarmoured
      Main Belt covers 100 % of normal length
      Main Belt inclined 16.00 degrees (positive = in)

  - Gun armour:    Face (max)    Other gunhouse (avg)    Barbette/hoist (max)
    Main:    5.91" / 150 mm    1.97" / 50 mm        5.12" / 130 mm
    2nd:    0.59" / 15 mm    0.12" / 3 mm              -
    3rd:    0.59" / 15 mm          -                  -
    4th:    0.59" / 15 mm          -                  -

  - Armoured deck - single deck:
    For and Aft decks: 1.97" / 50 mm
    Forecastle: 1.97" / 50 mm  Quarter deck: 1.97" / 50 mm

  - Conning towers: Forward 5.12" / 130 mm, Aft 0.00" / 0 mm

Machinery:
    Oil fired boilers, steam turbines,
    Geared drive, 2 shafts, 80,429 shp / 60,000 Kw = 32.13 kts
    Range 10,000nm at 15.00 kts
    Bunker at max displacement = 2,313 tons

Complement:
    521 - 678

Cost:
    £3.981 million / $15.926 million

Distribution of weights at normal displacement:
    Armament: 329 tons, 3.1 %
      - Guns: 329 tons, 3.1 %
    Armour: 2,556 tons, 24.1 %
      - Belts: 1,317 tons, 12.4 %
      - Armament: 350 tons, 3.3 %
      - Armour Deck: 836 tons, 7.9 %
      - Conning Tower: 53 tons, 0.5 %
    Machinery: 2,229 tons, 21.0 %
    Hull, fittings & equipment: 3,319 tons, 31.3 %
    Fuel, ammunition & stores: 1,746 tons, 16.5 %
    Miscellaneous weights: 413 tons, 3.9 %
      - On freeboard deck: 113 tons
      - Above deck: 300 tons

Fittings:
-55 t:  2 armed scoutplanes and a catapult, with hanger (FD)
-24 t:  2x3 530mm torpedo carriages, no reloads (FD)
-33 t:  Fire control (AD)
-25 t:  L/R wireless (AD)
-25 t:  Nightfighting doodads (AD)
-25 t:  Huelsmeyer device (AD)
-50 t:  Command facilities (AD)
-34 t + 142 t:  Weight reserve (FD/AD)

Overall survivability and seakeeping ability:
    Survivability (Non-critical penetrating hits needed to sink ship):
      13,620 lbs / 6,178 Kg = 132.3 x 5.9 " / 150 mm shells or 2.0 torpedoes
    Stability (Unstable if below 1.00): 1.07
    Metacentric height 2.6 ft / 0.8 m
    Roll period: 15.5 seconds
    Steadiness    - As gun platform (Average = 50 %): 60 %
            - Recoil effect (Restricted arc if above 1.00): 0.40
    Seaboat quality  (Average = 1.00): 1.24

Hull form characteristics:
    Hull has rise forward of midbreak,
      a normal bow and small transom stern
    Block coefficient (normal/deep): 0.450 / 0.463
    Length to Beam Ratio: 10.00 : 1
    'Natural speed' for length: 26.17 kts
    Power going to wave formation at top speed: 55 %
    Trim (Max stability = 0, Max steadiness = 100): 48
    Bow angle (Positive = bow angles forward): 20.00 degrees
    Stern overhang: 4.92 ft / 1.50 m
    Freeboard (% = length of deck as a percentage of waterline length):
                Fore end,    Aft end
      - Forecastle:    20.00 %,  27.89 ft / 8.50 m,  23.62 ft / 7.20 m
      - Forward deck:    35.00 %,  23.62 ft / 7.20 m,  23.62 ft / 7.20 m
      - Aft deck:    30.00 %,  15.75 ft / 4.80 m,  15.75 ft / 4.80 m
      - Quarter deck:    15.00 %,  15.75 ft / 4.80 m,  15.75 ft / 4.80 m
      - Average freeboard:        20.42 ft / 6.22 m

Ship space, strength and comments:
    Space    - Hull below water (magazines/engines, low = better): 80.1 %
        - Above water (accommodation/working, high = better): 166.3 %
    Waterplane Area: 22,763 Square feet or 2,115 Square metres
    Displacement factor (Displacement / loading): 125 %
    Structure weight / hull surface area: 90 lbs/sq ft or 441 Kg/sq metre
    Hull strength (Relative):
        - Cross-sectional: 0.85
        - Longitudinal: 1.49
        - Overall: 0.90
    Caution: Hull subject to strain in open-sea
    Excellent machinery, storage, compartmentation space
    Excellent accommodation and workspace room
    Good seaboat, rides out heavy weather easily

[The Rock Doctor]

A mid-life refit of the Straznik class armored cruisers replaces the 130mm battery with dual-purpose guns and complete changes up all the lighter weapons.  New fire control and a huelsmeyer device (basically a surface search radar at this point, but the term has stuck) are also fitted.

While the belt armor is a bit thin, there's no margin for replacing it unless I change up the machinery - which would get rather pricey indeed.  So we'll just skip that.

Estimated cost is $0.74 and 0.489 BP.



Enter ship name, Enter country Enter ship type laid down 1923

Displacement:
   17,856 t light; 18,878 t standard; 20,395 t normal; 21,609 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (727.61 ft / 711.94 ft) x 75.46 ft x (26.57 / 27.76 ft)
   (221.78 m / 217.00 m) x 23.00 m  x (8.10 / 8.46 m)

Armament:
      6 - 11.81" / 300 mm 45.0 cal guns - 830.84lbs / 376.86kg shells, 150 per gun
     Breech loading guns in turret on barbette mounts, 1923 Model
     3 x 2-gun mounts on centreline ends, majority forward
      1 raised mount - superfiring
      12 - 5.12" / 130 mm 45.0 cal guns - 67.61lbs / 30.67kg shells, 250 per gun
     Dual purpose guns in deck and hoist mounts, 1923 Model
     6 x 2-gun mounts on sides, evenly spread
      18 - 1.97" / 50.0 mm 60.0 cal guns - 4.18lbs / 1.89kg shells, 1,500 per gun
     Anti-air guns in deck mounts, 1923 Model
     8 x Twin mounts on sides, evenly spread
      4 raised mounts
     1 x Twin mount on centreline, aft deck aft
      16 - 0.98" / 25.0 mm 70.0 cal guns - 0.53lbs / 0.24kg shells, 5,000 per gun
     Machine guns in deck mounts, 1923 Model
     8 x Twin mounts on sides, evenly spread
      8 double raised mounts
      Weight of broadside 5,880 lbs / 2,667 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   5.91" / 150 mm   462.76 ft / 141.05 m   16.37 ft / 4.99 m
   Ends:   Unarmoured
     Main Belt covers 100 % of normal length
     Main Belt inclined 16.00 degrees (positive = in)

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   11.8" / 300 mm   2.95" / 75 mm      7.87" / 200 mm
   2nd:   1.97" / 50 mm   1.18" / 30 mm      1.97" / 50 mm
   3rd:   0.59" / 15 mm         -               -
   4th:   0.59" / 15 mm         -               -

   - Armoured deck - single deck:
   For and Aft decks: 2.95" / 75 mm
   Forecastle: 1.97" / 50 mm  Quarter deck: 2.95" / 75 mm

   - Conning towers: Forward 5.91" / 150 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 120,644 shp / 90,001 Kw = 31.86 kts
   Range 16,400nm at 10.00 kts
   Bunker at max displacement = 2,730 tons

Complement:
   853 - 1,109

Cost:
   £5.059 million / $20.235 million

Distribution of weights at normal displacement:
   Armament: 1,348 tons, 6.6 %
      - Guns: 1,348 tons, 6.6 %
   Armour: 4,824 tons, 23.7 %
      - Belts: 1,840 tons, 9.0 %
      - Armament: 976 tons, 4.8 %
      - Armour Deck: 1,912 tons, 9.4 %
      - Conning Tower: 95 tons, 0.5 %
   Machinery: 4,032 tons, 19.8 %
   Hull, fittings & equipment: 7,255 tons, 35.6 %
   Fuel, ammunition & stores: 2,539 tons, 12.5 %
   Miscellaneous weights: 397 tons, 1.9 %
      - On freeboard deck: 97 tons
      - Above deck: 300 tons

Fittings:
-55 t:  2 scoutplanes and catapult, with hanger (FD)
-135 t:  Fire control (AD) (new)
-50 t:  Command facilities (AD)
-25 t:  Huelsmeyer device (AD) (new)
-25 t:  Nightfighting doodads (AD)
-25 t:  L/R wireless (AD)
-44 t + 40 t:  Weight reserve (FD/AD)

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     23,426 lbs / 10,626 Kg = 28.4 x 11.8 " / 300 mm shells or 2.3 torpedoes
   Stability (Unstable if below 1.00): 1.06
   Metacentric height 3.7 ft / 1.1 m
   Roll period: 16.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 60 %
         - Recoil effect (Restricted arc if above 1.00): 0.71
   Seaboat quality  (Average = 1.00): 1.14

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.500 / 0.507
   Length to Beam Ratio: 9.43 : 1
   'Natural speed' for length: 26.68 kts
   Power going to wave formation at top speed: 52 %
   Trim (Max stability = 0, Max steadiness = 100): 53
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 4.92 ft / 1.50 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  29.53 ft / 9.00 m,  24.61 ft / 7.50 m
      - Forward deck:   30.00 %,  24.61 ft / 7.50 m,  24.61 ft / 7.50 m
      - Aft deck:   35.00 %,  16.73 ft / 5.10 m,  16.73 ft / 5.10 m
      - Quarter deck:   15.00 %,  16.73 ft / 5.10 m,  16.73 ft / 5.10 m
      - Average freeboard:      21.06 ft / 6.42 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 90.3 %
      - Above water (accommodation/working, high = better): 162.8 %
   Waterplane Area: 35,794 Square feet or 3,325 Square metres
   Displacement factor (Displacement / loading): 110 %
   Structure weight / hull surface area: 143 lbs/sq ft or 697 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.28
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room