Vilnius Union Ships, 1911 - 1919

[snip]

I think ether of those buy you enough headroom to run from older cruisers that might be more plentiful in second-class areas.

[The Rock Doctor]

Adds 400 t or thereabouts, shave the freeboard, add ~1.2 knots.  A few additional tonnes of misc. weight to allocate, too.

Enter ship name, Enter country Enter ship type laid down 1915

Displacement:
   2,859 t light; 2,982 t standard; 3,276 t normal; 3,510 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (417.03 ft / 406.82 ft) x 39.04 ft x (16.40 / 17.22 ft)
   (127.11 m / 124.00 m) x 11.90 m  x (5.00 / 5.25 m)

Armament:
      5 - 5.12" / 130 mm 45.0 cal guns - 67.62lbs / 30.67kg shells, 300 per gun
     Breech loading guns in deck and hoist mounts, 1915 Model
     3 x Single mounts on centreline ends, majority aft
      1 raised mount aft - superfiring
     2 x Single mounts on sides, aft deck centre
      2 - 1.97" / 50.0 mm 45.0 cal guns - 3.86lbs / 1.75kg shells, 200 per gun
     Anti-air guns in deck mounts, 1915 Model
     2 x Single mounts on sides, forward deck aft
      2 raised mounts
      4 - 0.39" / 10.0 mm 45.0 cal guns - 0.02lbs / 0.01kg shells, 15,000 per gun
     Machine guns in deck mounts, 1915 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 346 lbs / 157 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.97" / 50 mm   0.79" / 20 mm      1.97" / 50 mm
   2nd:   0.79" / 20 mm   0.39" / 10 mm            -
   3rd:   0.39" / 10 mm   0.39" / 10 mm            -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 34,852 shp / 26,000 Kw = 29.57 kts
   Range 8,000nm at 10.00 kts
   Bunker at max displacement = 528 tons

Complement:
   216 - 281

Cost:
   £0.461 million / $1.845 million

Distribution of weights at normal displacement:
   Armament: 93 tons, 2.8 %
      - Guns: 93 tons, 2.8 %
   Armour: 77 tons, 2.3 %
      - Armament: 77 tons, 2.3 %
   Machinery: 1,317 tons, 40.2 %
   Hull, fittings & equipment: 1,102 tons, 33.6 %
   Fuel, ammunition & stores: 417 tons, 12.7 %
   Miscellaneous weights: 270 tons, 8.2 %
      - On freeboard deck: 210 tons
      - Above deck: 60 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1,845 lbs / 837 Kg = 27.5 x 5.1 " / 130 mm shells or 0.5 torpedoes
   Stability (Unstable if below 1.00): 1.09
   Metacentric height 1.4 ft / 0.4 m
   Roll period: 13.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 60 %
         - Recoil effect (Restricted arc if above 1.00): 0.38
   Seaboat quality  (Average = 1.00): 1.20

Hull form characteristics:
   Hull has low quarterdeck ,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.440 / 0.449
   Length to Beam Ratio: 10.42 : 1
   'Natural speed' for length: 20.17 kts
   Power going to wave formation at top speed: 58 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 10.00 degrees
   Stern overhang: 6.56 ft / 2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  20.67 ft / 6.30 m,  15.75 ft / 4.80 m
      - Forward deck:   30.00 %,  15.75 ft / 4.80 m,  15.75 ft / 4.80 m
      - Aft deck:   40.00 %,  15.75 ft / 4.80 m,  15.75 ft / 4.80 m
      - Quarter deck:   10.00 %,  7.87 ft / 2.40 m,  7.87 ft / 2.40 m
      - Average freeboard:      15.35 ft / 4.68 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 140.4 %
      - Above water (accommodation/working, high = better): 139.6 %
   Waterplane Area: 10,051 Square feet or 934 Square metres
   Displacement factor (Displacement / loading): 99 %
   Structure weight / hull surface area: 60 lbs/sq ft or 293 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.82
      - Longitudinal: 1.96
      - Overall: 0.90
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room

[TacCovert4]

Honestly I'd fight for speed.  Because if even a pair of destroyers get onto you they're going to rip the cruiser apart as it has no armor and cant outrun them.

[The Rock Doctor]

I'll keep playing with it.

[The Rock Doctor]

On a very different note, The Baltic Geographic Society is proposing to mount an expedition to Antarctica, and has raised funds to build a custom ship for the job. 

The Pehr Kalm, named for a seventeenth century explorer, is a stout, three-masted vessel with a coal engine and single screw.  The hull is constructed from extremely think oak planks up to 600 mm thick (represented by the armor belts).  The hull's also strengthened to survive ice pressure and (theoretically, since I'm not sure how I'd sim it) with a curved bottom that will allow her to ride up over ice.  Considerable cargo space will allow for a large quantity of supplies to be embarked for her small crew of around 20-30.

Obviously I'm borrowing heavily from the historical Fram here.

I'm proposing to build her to civilian standards given the lack of actual armor, armament, or modern machinery.

Enter ship name, Enter country Enter ship type laid down 1915

Displacement:
   860 t light; 879 t standard; 985 t normal; 1,069 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (143.69 ft / 127.95 ft) x 36.09 ft x (11.48 / 12.33 ft)
   (43.80 m / 39.00 m) x 11.00 m  x (3.50 / 3.76 m)

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   1.97" / 50 mm   127.92 ft / 38.99 m   16.40 ft / 5.00 m
   Upper:   1.97" / 50 mm     76.77 ft / 23.40 m   8.20 ft / 2.50 m
     Main Belt covers 154 % of normal length

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 1 shaft, 536 ihp / 400 Kw = 10.59 kts
   Range 6,000nm at 8.00 kts
   Bunker at max displacement = 190 tons (100% coal)

Complement:
   87 - 114

Cost:
   £0.061 million / $0.243 million

Distribution of weights at normal displacement:
   Armament: 0 tons, 0.0 %
   Armour: 222 tons, 22.5 %
      - Belts: 222 tons, 22.5 %
   Machinery: 84 tons, 8.5 %
   Hull, fittings & equipment: 276 tons, 28.1 %
   Fuel, ammunition & stores: 125 tons, 12.7 %
   Miscellaneous weights: 278 tons, 28.2 %
      - On freeboard deck: 263 tons
      - Above deck: 15 tons

Fittings:
-15 t:  Masts above deck
-65 t:  Masts below deck
-198 t:  Supplies and stuff

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     4,529 lbs / 2,054 Kg = 41.9 x 6 " / 152 mm shells or 2.7 torpedoes
   Stability (Unstable if below 1.00): 1.34
   Metacentric height 1.8 ft / 0.6 m
   Roll period: 11.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - 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,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.650 / 0.657
   Length to Beam Ratio: 3.55 : 1
   'Natural speed' for length: 11.31 kts
   Power going to wave formation at top speed: 56 %
   Trim (Max stability = 0, Max steadiness = 100): 35
   Bow angle (Positive = bow angles forward): 25.00 degrees
   Stern overhang: 6.56 ft / 2.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  19.69 ft / 6.00 m,  13.12 ft / 4.00 m
      - Forward deck:   30.00 %,  13.12 ft / 4.00 m,  13.12 ft / 4.00 m
      - Aft deck:   30.00 %,  13.12 ft / 4.00 m,  13.12 ft / 4.00 m
      - Quarter deck:   20.00 %,  13.12 ft / 4.00 m,  19.69 ft / 6.00 m
      - Average freeboard:      14.30 ft / 4.36 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 29.2 %
      - Above water (accommodation/working, high = better): 100.2 %
   Waterplane Area: 3,488 Square feet or 324 Square metres
   Displacement factor (Displacement / loading): 148 %
   Structure weight / hull surface area: 46 lbs/sq ft or 227 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.93
      - Longitudinal: 11.83
      - Overall: 1.20
   Excellent machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, rides out heavy weather easily

[Kaiser Kirk]

I'm proposing to build her to civilian standards given the lack of actual armor, armament, or modern machinery.

yeah it's just thick wood, not armor. No problems.

[The Rock Doctor]

If I remove the 4x2 200/45 turrets from two Wspanially class battleships and 2x2 200/45 and 4x1 200/45 turrets from the two Grenadjar class armored cruisers, I'd have twelve twin turrets and eight single turrets.

The two ships have different protection on their turrets, though, so that's a little weird. The Wspanially turrets only have 15mm on the sides, which is weird, so I'd make that 50mm at a cost of 12 t per turret.

And I'd need to refresh the gun itself, at a cost of $0.50.  Not sure if I also need to actually pay cash/BP to refurb the physical gun/turret mounting, though.  For now I assume not.

But if I build a cruiser hull and park two Wspanially turrets forward, then a twin and two single Grenadjar turrets in line aft (Fletcher layout), I've got enough guns to build four of these.  Savings on the re-used turrets - discounting the refresh cost but including the armor tweak above - is 1,308 t.  Ignoring the gun refresh, this makes the net cost of the ship $9.94 and 9.938 BP.

Ersatz Grenadjar, scout cruiser, laid down 1916

Displacement:
   11,246 t light; 11,737 t standard; 12,544 t normal; 13,189 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (574.15 ft / 574.15 ft) x 65.62 ft x (24.28 / 25.19 ft)
   (175.00 m / 175.00 m) x 20.00 m  x (7.40 / 7.68 m)

Armament:
      4 - 7.87" / 200 mm 45.0 cal guns - 246.18lbs / 111.66kg shells, 150 per gun
     Breech loading guns in turret on barbette mounts, 1916 Model
     1 x Twin mount on centreline, aft deck aft
     2 x Single mounts on centreline, aft deck forward
      2 raised mounts
      4 - 7.87" / 200 mm 45.0 cal guns - 246.18lbs / 111.66kg shells, 150 per gun
     Breech loading guns in turret on barbette mounts, 1916 Model
     2 x Twin mounts on centreline, forward evenly spread
      1 raised mount
      8 - 5.12" / 130 mm 45.0 cal guns - 67.61lbs / 30.67kg shells, 250 per gun
     Breech loading guns in casemate mounts, 1916 Model
     8 x Single mounts on sides, evenly spread
      2 - 1.97" / 50.0 mm 45.0 cal guns - 3.85lbs / 1.74kg shells, 150 per gun
     Anti-air guns in deck mounts, 1916 Model
     2 x Single mounts on sides amidships
      2 raised mounts
      Weight of broadside 2,518 lbs / 1,142 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   4.72" / 120 mm   351.05 ft / 107.00 m   15.75 ft / 4.80 m
   Ends:   0.98" / 25 mm   216.50 ft / 65.99 m   11.81 ft / 3.60 m
     6.59 ft / 2.01 m Unarmoured ends
     Main Belt covers 94 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   9.84" / 250 mm   5.12" / 130 mm      7.87" / 200 mm
   2nd:   7.87" / 200 mm   1.97" / 50 mm      7.87" / 200 mm
   3rd:   1.97" / 50 mm   0.79" / 20 mm      1.97" / 50 mm
   4th:   0.79" / 20 mm   0.39" / 10 mm            -

   - Armoured deck - multiple decks:
   For and Aft decks: 1.57" / 40 mm
   Forecastle: 1.57" / 40 mm  Quarter deck: 1.57" / 40 mm

   - Conning towers: Forward 4.72" / 120 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 77,748 shp / 58,000 Kw = 30.13 kts
   Range 10,000nm at 10.00 kts
   Bunker at max displacement = 1,453 tons

Complement:
   592 - 770

Cost:
   £1.653 million / $6.611 million

Distribution of weights at normal displacement:
   Armament: 563 tons, 4.5 %
      - Guns: 563 tons, 4.5 %
   Armour: 2,868 tons, 22.9 %
      - Belts: 1,190 tons, 9.5 %
      - Armament: 899 tons, 7.2 %
      - Armour Deck: 724 tons, 5.8 %
      - Conning Tower: 55 tons, 0.4 %
   Machinery: 2,897 tons, 23.1 %
   Hull, fittings & equipment: 4,612 tons, 36.8 %
   Fuel, ammunition & stores: 1,298 tons, 10.3 %
   Miscellaneous weights: 307 tons, 2.4 %
      - On freeboard deck: 257 tons
      - Above deck: 50 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     15,675 lbs / 7,110 Kg = 64.2 x 7.9 " / 200 mm shells or 1.9 torpedoes
   Stability (Unstable if below 1.00): 1.09
   Metacentric height 3.1 ft / 1.0 m
   Roll period: 15.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.53
   Seaboat quality  (Average = 1.00): 1.20

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.480 / 0.486
   Length to Beam Ratio: 8.75 : 1
   'Natural speed' for length: 23.96 kts
   Power going to wave formation at top speed: 55 %
   Trim (Max stability = 0, Max steadiness = 100): 42
   Bow angle (Positive = bow angles forward): -10.00 degrees
   Stern overhang: -3.28 ft / -1.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  26.25 ft / 8.00 m,  21.33 ft / 6.50 m
      - Forward deck:   30.00 %,  21.33 ft / 6.50 m,  21.33 ft / 6.50 m
      - Aft deck:   35.00 %,  21.33 ft / 6.50 m,  21.33 ft / 6.50 m
      - Quarter deck:   15.00 %,  21.33 ft / 6.50 m,  21.33 ft / 6.50 m
      - Average freeboard:      21.72 ft / 6.62 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 91.5 %
      - Above water (accommodation/working, high = better): 169.2 %
   Waterplane Area: 24,654 Square feet or 2,290 Square metres
   Displacement factor (Displacement / loading): 114 %
   Structure weight / hull surface area: 121 lbs/sq ft or 589 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.93
      - Longitudinal: 1.83
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room

[The Rock Doctor]

Or if I use new guns with more typical treaty-cruiser gun protection, there's no $0.50 gun refresh and the cost is $10.60 and 10.604 BP, so about 0.6 BP more expensive.

Ersatz Grenadjar II, Enter country Enter ship type laid down 1916

Displacement:
   10,604 t light; 11,081 t standard; 11,856 t normal; 12,476 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (557.74 ft / 557.74 ft) x 65.62 ft x (23.62 / 24.53 ft)
   (170.00 m / 170.00 m) x 20.00 m  x (7.20 / 7.48 m)

Armament:
      8 - 7.87" / 200 mm 45.0 cal guns - 246.18lbs / 111.66kg shells, 150 per gun
     Breech loading guns in turret on barbette mounts, 1916 Model
     4 x Twin mounts on centreline, evenly spread
      2 raised mounts
      8 - 5.12" / 130 mm 45.0 cal guns - 67.61lbs / 30.67kg shells, 250 per gun
     Breech loading guns in casemate mounts, 1916 Model
     8 x Single mounts on sides, evenly spread
      2 - 1.97" / 50.0 mm 45.0 cal guns - 3.85lbs / 1.74kg shells, 150 per gun
     Anti-air guns in deck mounts, 1916 Model
     2 x Single mounts on sides amidships
      2 raised mounts
      Weight of broadside 2,518 lbs / 1,142 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   4.72" / 120 mm   351.05 ft / 107.00 m   15.75 ft / 4.80 m
   Ends:   0.98" / 25 mm   206.66 ft / 62.99 m   11.81 ft / 3.60 m
     Main Belt covers 97 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   5.91" / 150 mm   3.94" / 100 mm      5.91" / 150 mm
   3rd:   1.97" / 50 mm   0.79" / 20 mm      1.97" / 50 mm
   4th:   0.79" / 20 mm   0.39" / 10 mm            -

   - Armoured deck - multiple decks:
   For and Aft decks: 1.57" / 40 mm
   Forecastle: 1.57" / 40 mm  Quarter deck: 1.57" / 40 mm

   - Conning towers: Forward 4.72" / 120 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 76,407 shp / 57,000 Kw = 30.14 kts
   Range 10,000nm at 10.00 kts
   Bunker at max displacement = 1,394 tons

Complement:
   567 - 738

Cost:
   £1.605 million / $6.419 million

Distribution of weights at normal displacement:
   Armament: 526 tons, 4.4 %
      - Guns: 526 tons, 4.4 %
   Armour: 2,592 tons, 21.9 %
      - Belts: 1,183 tons, 10.0 %
      - Armament: 652 tons, 5.5 %
      - Armour Deck: 703 tons, 5.9 %
      - Conning Tower: 53 tons, 0.4 %
   Machinery: 2,847 tons, 24.0 %
   Hull, fittings & equipment: 4,297 tons, 36.2 %
   Fuel, ammunition & stores: 1,252 tons, 10.6 %
   Miscellaneous weights: 343 tons, 2.9 %
      - On freeboard deck: 293 tons
      - Above deck: 50 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     14,694 lbs / 6,665 Kg = 60.2 x 7.9 " / 200 mm shells or 1.8 torpedoes
   Stability (Unstable if below 1.00): 1.13
   Metacentric height 3.4 ft / 1.0 m
   Roll period: 15.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.51
   Seaboat quality  (Average = 1.00): 1.17

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.480 / 0.486
   Length to Beam Ratio: 8.50 : 1
   'Natural speed' for length: 23.62 kts
   Power going to wave formation at top speed: 56 %
   Trim (Max stability = 0, Max steadiness = 100): 43
   Bow angle (Positive = bow angles forward): -10.00 degrees
   Stern overhang: -3.28 ft / -1.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  26.25 ft / 8.00 m,  21.33 ft / 6.50 m
      - Forward deck:   30.00 %,  21.33 ft / 6.50 m,  21.33 ft / 6.50 m
      - Aft deck:   35.00 %,  21.33 ft / 6.50 m,  21.33 ft / 6.50 m
      - Quarter deck:   15.00 %,  21.33 ft / 6.50 m,  21.33 ft / 6.50 m
      - Average freeboard:      21.72 ft / 6.62 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 95.3 %
      - Above water (accommodation/working, high = better): 171.6 %
   Waterplane Area: 23,950 Square feet or 2,225 Square metres
   Displacement factor (Displacement / loading): 111 %
   Structure weight / hull surface area: 116 lbs/sq ft or 567 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.93
      - Longitudinal: 1.83
      - Overall: 1.00
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room

[Kaiser Kirk]

I've been toying around with similar ships, either with my 180L43 Fusilade, or the 230L44 Capharact.
I wind up with larger - in the case of the 230, much larger.

This is actually much more akin to my Vayu raiding cruiser, but that is 7500t with a 90mm belt.

I view the evolution of the AC to 'battlecruiser' as leaving a gap for a ship to do the AC role.
But I don't think adopting treaty cruiser armor is wise at this point.  There are alot of old ACs out there,
and a 250mm round will poke holes at all current combat ranges.
...which admittedly is more a concern for Parthia since the Byzantines have a number of those.

While your two "Op Foes" of the Norse and Romans and have more 8" weapons, except the three Selkirks.
Of course, what the Norse build should effect, and more along the line of Selkirk seems likely.

[The Rock Doctor]

Hey, it's an armored minesweeper, purpose-built to sweep under fire and attack from light enemy forces.  Does it make more sense than using destroyers for the role?  I dunno, but they might live a little bit longer.

Enter ship name, Enter country Enter ship type laid down 1916

Displacement:
   998 t light; 1,031 t standard; 1,174 t normal; 1,288 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (236.41 ft / 229.66 ft) x 31.17 ft x (11.48 / 12.32 ft)
   (72.06 m / 70.00 m) x 9.50 m  x (3.50 / 3.76 m)

Armament:
      4 - 3.94" / 100 mm 45.0 cal guns - 30.77lbs / 13.96kg shells, 150 per gun
     Quick firing guns in deck mounts, 1916 Model
     2 x Single mounts on centreline, forward deck forward
      1 raised mount - superfiring
     2 x Single mounts on centreline, forward deck aft
      Weight of broadside 123 lbs / 56 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   1.97" / 50 mm   164.04 ft / 50.00 m   11.48 ft / 3.50 m
   Ends:   Unarmoured
     Main Belt covers 110 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.79" / 20 mm   0.39" / 10 mm            -

   - Protected deck - single deck:
   For and Aft decks: 0.59" / 15 mm
   Forecastle: 0.59" / 15 mm  Quarter deck: 0.59" / 15 mm

   - Conning towers: Forward 1.97" / 50 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 9,383 shp / 7,000 Kw = 23.03 kts
   Range 8,000nm at 10.00 kts
   Bunker at max displacement = 257 tons

Complement:
   99 - 130

Cost:
   £0.147 million / $0.588 million

Distribution of weights at normal displacement:
   Armament: 22 tons, 1.9 %
      - Guns: 22 tons, 1.9 %
   Armour: 222 tons, 18.9 %
      - Belts: 154 tons, 13.1 %
      - Armament: 11 tons, 0.9 %
      - Armour Deck: 53 tons, 4.5 %
      - Conning Tower: 5 tons, 0.4 %
   Machinery: 350 tons, 29.8 %
   Hull, fittings & equipment: 349 tons, 29.7 %
   Fuel, ammunition & stores: 176 tons, 15.0 %
   Miscellaneous weights: 55 tons, 4.7 %
      - On freeboard deck: 53 tons
      - Above deck: 2 tons
Fittings:
-50 t:  Sweeping kit
-2 t:  Fire Control
-3 t:  Weight reserve

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1,391 lbs / 631 Kg = 45.6 x 3.9 " / 100 mm shells or 0.6 torpedoes
   Stability (Unstable if below 1.00): 1.20
   Metacentric height 1.2 ft / 0.4 m
   Roll period: 11.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 72 %
         - Recoil effect (Restricted arc if above 1.00): 0.18
   Seaboat quality  (Average = 1.00): 1.19

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.500 / 0.511
   Length to Beam Ratio: 7.37 : 1
   'Natural speed' for length: 15.15 kts
   Power going to wave formation at top speed: 67 %
   Trim (Max stability = 0, Max steadiness = 100): 61
   Bow angle (Positive = bow angles forward): 10.00 degrees
   Stern overhang: 3.28 ft / 1.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  19.69 ft / 6.00 m,  15.75 ft / 4.80 m
      - Forward deck:   40.00 %,  15.75 ft / 4.80 m,  15.75 ft / 4.80 m
      - Aft deck:   20.00 %,  7.87 ft / 2.40 m,  7.87 ft / 2.40 m
      - Quarter deck:   20.00 %,  7.87 ft / 2.40 m,  7.87 ft / 2.40 m
      - Average freeboard:      12.91 ft / 3.94 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 102.2 %
      - Above water (accommodation/working, high = better): 120.4 %
   Waterplane Area: 4,769 Square feet or 443 Square metres
   Displacement factor (Displacement / loading): 114 %
   Structure weight / hull surface area: 40 lbs/sq ft or 197 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.76
      - Longitudinal: 3.77
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

[Kaiser Kirk]

A 50mm belt not covering the entire waterline would not stop the larger destroyer weapons within 10,000m, and with 40% of the waterline unarmored, it would be subject to loss of speed from waterline damage.
Still well armed for self defense and a bit faster than most.

[The Rock Doctor]

A 50mm belt not covering the entire waterline would not stop the larger destroyer weapons within 10,000m, and with 40% of the waterline unarmored, it would be subject to loss of speed from waterline damage.
Still well armed for self defense and a bit faster than most.

A longer belt will add weight, but not terribly...

Enter ship name, Enter country Enter ship type laid down 1916

Displacement:
   1,059 t light; 1,094 t standard; 1,241 t normal; 1,359 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (236.41 ft / 229.66 ft) x 31.17 ft x (12.14 / 13.01 ft)
   (72.06 m / 70.00 m) x 9.50 m  x (3.70 / 3.96 m)

Armament:
      4 - 3.94" / 100 mm 45.0 cal guns - 30.78lbs / 13.96kg shells, 150 per gun
     Quick firing guns in deck mounts, 1916 Model
     2 x Single mounts on centreline, forward deck forward
      1 raised mount - superfiring
     2 x Single mounts on centreline, forward deck aft
      Weight of broadside 123 lbs / 56 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   1.97" / 50 mm   229.66 ft / 70.00 m   11.48 ft / 3.50 m
     Main Belt covers 154 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.79" / 20 mm   0.39" / 10 mm            -

   - Protected deck - single deck:
   For and Aft decks: 0.59" / 15 mm
   Forecastle: 0.59" / 15 mm  Quarter deck: 0.59" / 15 mm

   - Conning towers: Forward 1.97" / 50 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 9,718 shp / 7,250 Kw = 23.03 kts
   Range 8,000nm at 10.00 kts
   Bunker at max displacement = 266 tons

Complement:
   103 - 135

Cost:
   £0.153 million / $0.613 million

Distribution of weights at normal displacement:
   Armament: 22 tons, 1.8 %
      - Guns: 22 tons, 1.8 %
   Armour: 260 tons, 21.0 %
      - Belts: 192 tons, 15.5 %
      - Armament: 11 tons, 0.9 %
      - Armour Deck: 53 tons, 4.2 %
      - Conning Tower: 5 tons, 0.4 %
   Machinery: 362 tons, 29.2 %
   Hull, fittings & equipment: 356 tons, 28.7 %
   Fuel, ammunition & stores: 183 tons, 14.7 %
   Miscellaneous weights: 58 tons, 4.7 %
      - On freeboard deck: 56 tons
      - Above deck: 2 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1,483 lbs / 673 Kg = 48.6 x 3.9 " / 100 mm shells or 0.6 torpedoes
   Stability (Unstable if below 1.00): 1.19
   Metacentric height 1.2 ft / 0.4 m
   Roll period: 11.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.17
   Seaboat quality  (Average = 1.00): 1.17

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.500 / 0.511
   Length to Beam Ratio: 7.37 : 1
   'Natural speed' for length: 15.15 kts
   Power going to wave formation at top speed: 67 %
   Trim (Max stability = 0, Max steadiness = 100): 60
   Bow angle (Positive = bow angles forward): 10.00 degrees
   Stern overhang: 3.28 ft / 1.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  19.69 ft / 6.00 m,  15.75 ft / 4.80 m
      - Forward deck:   40.00 %,  15.75 ft / 4.80 m,  15.75 ft / 4.80 m
      - Aft deck:   20.00 %,  7.87 ft / 2.40 m,  7.87 ft / 2.40 m
      - Quarter deck:   20.00 %,  7.87 ft / 2.40 m,  7.87 ft / 2.40 m
      - Average freeboard:      12.91 ft / 3.94 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 100.0 %
      - Above water (accommodation/working, high = better): 115.7 %
   Waterplane Area: 4,769 Square feet or 443 Square metres
   Displacement factor (Displacement / loading): 113 %
   Structure weight / hull surface area: 41 lbs/sq ft or 198 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.76
      - Longitudinal: 3.82
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Adequate machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

[Kaiser Kirk]

That will be tough for a marauding DD to take.

[Desertfox]

That's as opposite a design as it gets for a minesweeper as I'm doing. I take it Wilno is planning for offensive minesweeping operations?

[Kaiser Kirk]

You missed his first version :)

Hey, it's an armored minesweeper, purpose-built to sweep under fire and attack from light enemy forces.  Does it make more sense than using destroyers for the role?  I dunno, but they might live a little bit longer.