Vilnius Union Ships, 1920+: Electric Drive Boogaloo

[TacCovert4]

Reminds me that I haven't built my own river patrol ship/boat yet.

[The Rock Doctor]

The Union's northeastern frontier includes extensive waterways on rivers such as the Neva and lakes such as Ladoga.  These freeze over in winter, which naturally brings waterborne activity to a stop for months each year.

However, there might be circumstances where one wants to enable river traffic early (or later) than the shipping season would normally allow.  This might include freeing ships stuck in an early freeze or, in the event of a war with the Northern Kingdom or Golden Horde, eliminating the ability of ground forces to cross frozen rivers.

So the Union's going to build a few small armed/armored icebreakers for service in the northeast.  Even if not dealing in militarily necessary activities, they can support civilian operations in the Baltic and inland northeast.

The armament is defensive, and mainly about fending off airplanes, infantry or cavalry.

The bow and stern are armored against heavy ice; the rest of the hull is strengthened against ice and small-arms fire, with the upper belt representing a proper box around the machinery and ammunition stowage.


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

Displacement:
   204 t light; 211 t standard; 215 t normal; 218 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (149.82 ft / 144.36 ft) x 26.25 ft x (3.61 / 3.65 ft)
   (45.66 m / 44.00 m) x 8.00 m  x (1.10 / 1.11 m)

Armament:
      1 - 1.97" / 50.0 mm 45.0 cal gun - 3.85lbs / 1.74kg shells, 250 per gun
     Quick firing gun in deck mount, 1923 Model
     1 x Single mount on centreline, forward deck centre
      1 - 1.97" / 50.0 mm 45.0 cal gun - 3.86lbs / 1.75kg shells, 250 per gun
     Anti-air gun in deck mount, 1923 Model
     1 x Single mount on centreline, aft deck centre
      4 - 0.59" / 15.0 mm 90.0 cal guns - 0.11lbs / 0.05kg shells, 4,000 per gun
     Machine guns in deck mounts, 1923 Model
     2 x Single mounts on sides amidships
      2 raised mounts
     2 x Single mounts on centreline, evenly spread
      2 raised mounts
      Weight of broadside 8 lbs / 4 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   0.79" / 20 mm     93.83 ft / 28.60 m   3.94 ft / 1.20 m
   Ends:   1.97" / 50 mm     50.49 ft / 15.39 m   5.91 ft / 1.80 m
   Upper:   0.79" / 20 mm     32.81 ft / 10.00 m   3.94 ft / 1.20 m
     Main Belt covers 100 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.57" / 40 mm   0.79" / 20 mm            -
   3rd:   0.98" / 25 mm   0.79" / 20 mm            -
   4th:   0.39" / 10 mm         -               -

   - Box over machinery & magazines:
   0.79" / 20 mm
   Forecastle: 0.00" / 0 mm  Quarter deck: 0.79" / 20 mm

   - Conning towers: Forward 0.79" / 20 mm, Aft 0.00" / 0 mm

Machinery:
   Diesel Internal combustion motors,
   Geared drive, 2 shafts, 470 shp / 350 Kw = 13.21 kts
   Range 500nm at 10.00 kts
   Bunker at max displacement = 7 tons

Complement:
   27 - 36

Cost:
   £0.029 million / $0.116 million

Distribution of weights at normal displacement:
   Armament: 2 tons, 1.0 %
      - Guns: 2 tons, 1.0 %
   Armour: 78 tons, 36.1 %
      - Belts: 41 tons, 19.2 %
      - Armament: 12 tons, 5.5 %
      - Armour Deck: 24 tons, 11.1 %
      - Conning Tower: 1 tons, 0.3 %
   Machinery: 16 tons, 7.3 %
   Hull, fittings & equipment: 93 tons, 43.3 %
   Fuel, ammunition & stores: 10 tons, 4.9 %
   Miscellaneous weights: 16 tons, 7.4 %
      - Hull below water: 5 tons
      - On freeboard deck: 7 tons
      - Above deck: 4 tons

Fittings:
-4 t:  Fire control, spotlights and stuff (AD)
-7 t:  Weight reserve and/or deck cargo (FD)
-5 t:  Diesel engines (BW)

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1,291 lbs / 585 Kg = 338.4 x 2.0 " / 50 mm shells or 1.7 torpedoes
   Stability (Unstable if below 1.00): 1.36
   Metacentric height 1.2 ft / 0.4 m
   Roll period: 10.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.02
   Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.550 / 0.552
   Length to Beam Ratio: 5.50 : 1
   'Natural speed' for length: 12.01 kts
   Power going to wave formation at top speed: 49 %
   Trim (Max stability = 0, Max steadiness = 100): 70
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 1.64 ft / 0.50 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   25.00 %,  10.50 ft / 3.20 m,  7.87 ft / 2.40 m
      - Forward deck:   25.00 %,  7.87 ft / 2.40 m,  5.91 ft / 1.80 m
      - Aft deck:   35.00 %,  5.91 ft / 1.80 m,  5.91 ft / 1.80 m
      - Quarter deck:   15.00 %,  5.91 ft / 1.80 m,  5.91 ft / 1.80 m
      - Average freeboard:      6.91 ft / 2.11 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 31.3 %
      - Above water (accommodation/working, high = better): 117.8 %
   Waterplane Area: 2,644 Square feet or 246 Square metres
   Displacement factor (Displacement / loading): 164 %
   Structure weight / hull surface area: 28 lbs/sq ft or 136 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.50
      - Overall: 1.00
   Excellent machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

[Jefgte]

Definitely a useful ship.

;)

[The Rock Doctor]

Thanks.

I was just thinking maybe I should add a couple for use in North America (Chesapeake Bay and thereabouts). 

[The Rock Doctor]

And an armored river gunboat to replace some of the Type 1895 class.

It's twice the displacement of the Type 1895, but has a far heavier armament, better protection, and better speed/range.



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

Displacement:
   174 t light; 184 t standard; 189 t normal; 192 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (148.98 ft / 144.36 ft) x 19.69 ft x (3.94 / 3.99 ft)
   (45.41 m / 44.00 m) x 6.00 m  x (1.20 / 1.22 m)

Armament:
      3 - 2.95" / 75.0 mm 45.0 cal guns - 12.98lbs / 5.89kg shells, 250 per gun
     Quick firing guns in deck mounts, 1923 Model
     3 x Single mounts on centreline ends, majority forward
      1 raised mount - superfiring
      1 - 1.97" / 50.0 mm 45.0 cal gun - 3.86lbs / 1.75kg shells, 250 per gun
     Anti-air gun in deck mount, 1923 Model
     1 x Single mount on centreline, aft deck forward
      4 - 0.59" / 15.0 mm 90.0 cal guns - 0.11lbs / 0.05kg shells, 4,000 per gun
     Machine guns in deck mounts, 1923 Model
     4 x Single mounts on sides, forward deck aft
      4 raised mounts
      Weight of broadside 43 lbs / 20 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   1.57" / 40 mm     36.09 ft / 11.00 m   6.23 ft / 1.90 m
   Ends:   0.79" / 20 mm   108.23 ft / 32.99 m   3.94 ft / 1.20 m
     Main Belt covers 38 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.57" / 40 mm   0.79" / 20 mm            -
   3rd:   0.98" / 25 mm   0.39" / 10 mm            -
   4th:   0.39" / 10 mm         -               -

   - Box over machinery & magazines:
   0.98" / 25 mm
   Forecastle: 0.00" / 0 mm  Quarter deck: 0.59" / 15 mm

   - Conning towers: Forward 0.59" / 15 mm, Aft 0.00" / 0 mm

Machinery:
   Diesel Internal combustion motors,  plus diesel motors,
   Geared drive, 2 shafts, 335 shp / 250 Kw = 12.52 kts
   Range 600nm at 10.00 kts
   Bunker at max displacement = 7 tons

Complement:
   25 - 33

Cost:
   £0.029 million / $0.117 million

Distribution of weights at normal displacement:
   Armament: 9 tons, 4.6 %
      - Guns: 9 tons, 4.6 %
   Armour: 73 tons, 38.9 %
      - Belts: 32 tons, 17.0 %
      - Armament: 20 tons, 10.4 %
      - Armour Deck: 21 tons, 11.3 %
      - Conning Tower: 0 tons, 0.2 %
   Machinery: 11 tons, 5.9 %
   Hull, fittings & equipment: 69 tons, 36.8 %
   Fuel, ammunition & stores: 15 tons, 7.9 %
   Miscellaneous weights: 11 tons, 5.8 %
      - Hull below water: 4 tons
      - On freeboard deck: 5 tons
      - Above deck: 2 tons

Fittings:
-2 t:  Fire control, such as it is, and a searchlight (AD)
-5 t:  Weight reserve or deck space (FD)
-4 t:  Diesel engines (BW)

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     675 lbs / 306 Kg = 52.4 x 3.0 " / 75 mm shells or 1.1 torpedoes
   Stability (Unstable if below 1.00): 1.19
   Metacentric height 0.6 ft / 0.2 m
   Roll period: 10.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.22
   Seaboat quality  (Average = 1.00): 1.05

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.590 / 0.592
   Length to Beam Ratio: 7.33 : 1
   'Natural speed' for length: 12.01 kts
   Power going to wave formation at top speed: 45 %
   Trim (Max stability = 0, Max steadiness = 100): 67
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 1.64 ft / 0.50 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   25.00 %,  8.20 ft / 2.50 m,  6.23 ft / 1.90 m
      - Forward deck:   25.00 %,  6.23 ft / 1.90 m,  4.27 ft / 1.30 m
      - Aft deck:   35.00 %,  4.27 ft / 1.30 m,  4.27 ft / 1.30 m
      - Quarter deck:   15.00 %,  4.27 ft / 1.30 m,  4.27 ft / 1.30 m
      - Average freeboard:      5.20 ft / 1.59 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 37.4 %
      - Above water (accommodation/working, high = better): 73.3 %
   Waterplane Area: 2,059 Square feet or 191 Square metres
   Displacement factor (Displacement / loading): 146 %
   Structure weight / hull surface area: 27 lbs/sq ft or 133 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.00
      - Longitudinal: 1.09
      - Overall: 1.00
   Excellent machinery, storage, compartmentation space
   Cramped accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

[The Rock Doctor]

The not-Parana and not-Paraguay rivers are important - nay, VITAL - transportation corridors in South Erika.  While your typical ocean-going ships can't make the run up to not-Asuncion is, or will be, the not-Paraguay can still handle those with an eight foot draft.  That allows for a fairly capable vessel to be built with that draft and the 100m capacity of regional drydocks in mind.

This riverine transport would be capable of carrying five hundred passengers and some cargo from Widoknagory (Montevideo) to Asuncion, or four times the passengers on a short day run.  The ship itself is nothing fancy, although the design is fairly distinctly separated into operations, cargo, and passenger sections. 

The ship is lightly armed for self-defence against land, water, or aircraft threats.

The class - at least two - will be built to civilian standards.

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

Displacement:
   2,436 t light; 2,492 t standard; 2,538 t normal; 2,575 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (325.59 ft / 318.24 ft) x 62.34 ft x (6.89 / 6.97 ft)
   (99.24 m / 97.00 m) x 19.00 m  x (2.10 / 2.13 m)

Armament:
      2 - 2.95" / 75.0 mm 45.0 cal guns - 12.99lbs / 5.89kg shells, 250 per gun
     Quick firing guns in deck mounts, 1923 Model
     2 x Single mounts on centreline, evenly spread
      2 raised mounts
      4 - 0.59" / 15.0 mm 90.0 cal guns - 0.11lbs / 0.05kg shells, 4,000 per gun
     Machine guns in deck mounts, 1923 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      2 - 1.97" / 50.0 mm 45.0 cal guns - 3.86lbs / 1.75kg shells, 250 per gun
     Anti-air guns in deck mounts, 1923 Model
     2 x Single mounts on sides, aft deck forward
      2 raised mounts
      Weight of broadside 34 lbs / 15 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.98" / 25 mm   0.79" / 20 mm            -
   3rd:   0.79" / 20 mm   0.39" / 10 mm            -

Machinery:
   Diesel Internal combustion motors,
   Geared drive, 2 shafts, 1,478 shp / 1,103 Kw = 12.21 kts
   Range 1,200nm at 10.00 kts
   Bunker at max displacement = 83 tons

Complement:
   178 - 232

Cost:
   £0.274 million / $1.095 million

Distribution of weights at normal displacement:
   Armament: 7 tons, 0.3 %
      - Guns: 7 tons, 0.3 %
   Armour: 13 tons, 0.5 %
      - Armament: 13 tons, 0.5 %
   Machinery: 49 tons, 1.9 %
   Hull, fittings & equipment: 1,032 tons, 40.7 %
   Fuel, ammunition & stores: 102 tons, 4.0 %
   Miscellaneous weights: 1,334 tons, 52.6 %
      - Hull below water: 215 tons
      - Hull above water: 300 tons
      - On freeboard deck: 494 tons
      - Above deck: 325 tons

Fittings: 
-25 t:  L/R wireless
-1,000 t:  Accommodation for 500 passengers (AD/FD/AW)
-94 t:  Weight reserve/deck cargo (FD)
-200 t:  Cargo (BW)
-15 t:  Diesel motors (BW)

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     15,162 lbs / 6,878 Kg = 1,177.9 x 3.0 " / 75 mm shells or 5.0 torpedoes
   Stability (Unstable if below 1.00): 1.26
   Metacentric height 3.8 ft / 1.1 m
   Roll period: 13.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 100 %
         - Recoil effect (Restricted arc if above 1.00): 0.01
   Seaboat quality  (Average = 1.00): 1.29

Hull form characteristics:
   Hull has rise aft of midbreak, low quarterdeck ,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.650 / 0.651
   Length to Beam Ratio: 5.11 : 1
   'Natural speed' for length: 17.84 kts
   Power going to wave formation at top speed: 27 %
   Trim (Max stability = 0, Max steadiness = 100): 78
   Bow angle (Positive = bow angles forward): 10.00 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 %,  13.78 ft / 4.20 m,  8.86 ft / 2.70 m
      - Forward deck:   30.00 %,  8.86 ft / 2.70 m,  8.86 ft / 2.70 m
      - Aft deck:   40.00 %,  16.73 ft / 5.10 m,  16.73 ft / 5.10 m
      - Quarter deck:   10.00 %,  8.86 ft / 2.70 m,  8.86 ft / 2.70 m
      - Average freeboard:      12.40 ft / 3.78 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 30.8 %
      - Above water (accommodation/working, high = better): 217.2 %
   Waterplane Area: 15,197 Square feet or 1,412 Square metres
   Displacement factor (Displacement / loading): 173 %
   Structure weight / hull surface area: 58 lbs/sq ft or 286 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.27
      - Overall: 1.00
   Excellent 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

[TacCovert4]

Quite impressive.  Reminds me that I need to build some of the Creek class Riverboats myself, now that I have the Drydock on the Missouri.  Not as multi-role as yours, and not quite as vital as relations with Rome have softened substantially.  But still useful.

[The Rock Doctor]

And a smaller 250 t-ish boat that could be built and maintained with the Union's 50m drydock suite.  On the upside, it's a good seaboat (not to be confused with Good Seaboat) for its size and it can haul around a few big fish.  On the downside, the type is definitely limited by its top speed and there's no capacity for ASW.

Decided to tackle the 250 t with a longer, shallower hull.

It would barely fit into a 60m drydock.  Not that I have any - but some of my 50m docks could be expanded with fairly minimal effort if needed.

It's a pure anti-surface platform, no ASW capability at all.  The question is what to do with the torpedo selection - two 3t 21" or three 2 t 18"?  There are arguments for either.

I think I'd still lean toward half the number of 500t boats instead, but it's fun to play around.



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

Displacement:
   250 t light; 260 t standard; 287 t normal; 309 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (196.73 ft / 191.60 ft) x 17.39 ft x (7.55 / 7.91 ft)
   (59.96 m / 58.40 m) x 5.30 m  x (2.30 / 2.41 m)

Armament:
      2 - 2.95" / 75.0 mm 45.0 cal guns - 12.99lbs / 5.89kg shells, 250 per gun
     Quick firing guns in deck mounts, 1923 Model
     2 x Single mounts on centreline ends, evenly spread
      1 - 1.97" / 50.0 mm 45.0 cal gun - 3.86lbs / 1.75kg shells, 200 per gun
     Anti-air gun in deck mount, 1923 Model
     1 x Single mount on sides, aft deck forward
      4 - 0.59" / 15.0 mm 45.0 cal guns - 0.11lbs / 0.05kg shells, 4,000 per gun
     Machine guns in deck mounts, 1923 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 30 lbs / 14 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.79" / 20 mm   0.12" / 3 mm            -
   2nd:   0.79" / 20 mm   0.12" / 3 mm            -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 7,507 shp / 5,600 Kw = 27.10 kts
   Range 4,000nm at 10.00 kts
   Bunker at max displacement = 49 tons

Complement:
   34 - 45

Cost:
   £0.090 million / $0.359 million

Distribution of weights at normal displacement:
   Armament: 6 tons, 2.1 %
      - Guns: 6 tons, 2.1 %
   Armour: 3 tons, 1.1 %
      - Armament: 3 tons, 1.1 %
   Machinery: 147 tons, 51.0 %
   Hull, fittings & equipment: 85 tons, 29.6 %
   Fuel, ammunition & stores: 38 tons, 13.1 %
   Miscellaneous weights: 9 tons, 3.1 %
      - On freeboard deck: 7 tons
      - Above deck: 2 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     85 lbs / 38 Kg = 6.6 x 3.0 " / 75 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.15
   Metacentric height 0.5 ft / 0.1 m
   Roll period: 10.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 60 %
         - Recoil effect (Restricted arc if above 1.00): 0.22
   Seaboat quality  (Average = 1.00): 1.00

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.400 / 0.410
   Length to Beam Ratio: 11.02 : 1
   'Natural speed' for length: 13.84 kts
   Power going to wave formation at top speed: 69 %
   Trim (Max stability = 0, Max steadiness = 100): 60
   Bow angle (Positive = bow angles forward): 15.00 degrees
   Stern overhang: 1.97 ft / 0.60 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   26.00 %,  11.81 ft / 3.60 m,  9.84 ft / 3.00 m
      - Forward deck:   26.00 %,  9.84 ft / 3.00 m,  7.87 ft / 2.40 m
      - Aft deck:   33.00 %,  7.87 ft / 2.40 m,  7.87 ft / 2.40 m
      - Quarter deck:   15.00 %,  7.87 ft / 2.40 m,  7.87 ft / 2.40 m
      - Average freeboard:      8.85 ft / 2.70 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 171.3 %
      - Above water (accommodation/working, high = better): 95.4 %
   Waterplane Area: 2,051 Square feet or 191 Square metres
   Displacement factor (Displacement / loading): 54 %
   Structure weight / hull surface area: 18 lbs/sq ft or 88 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 3.17
      - Overall: 0.60
   Cramped machinery, storage, compartmentation space
   Adequate accommodation and workspace room

Trial speed 31.36
Bonus 4.26

[The Rock Doctor]

River transportation in Orimirilandia (Nigeria et al) is not so easy as it is over in South Erica.  Seasonal variations are more pronounced, and river depths generally shallower. 

Nonetheless, it is possible for part of the year to run ships of up to ~2m draft to the town of Jebba, which is something like 500 miles upriver from the mouth of the Orimiri/Niger, which is most of the way to the border with the Berbers.  There's a couple of long navigable stretches upriver from there, but those are strictly Berber waters and Not My Problem.  Although if they want to talk about building a lock system at the rapids, we could talk.

Building a ship with a 1.2 m draft buys less capability, but definitely improves the odds that it can run up to Jebba during drier seasons.  The need for anti-aircraft guns is questionable - I have no idea what value the Berbers assign to them - but the deck space is available.  The engines are diesel given the region's considerable and already fairly developed petroleum reserves.



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

Displacement:
   1,539 t light; 1,575 t standard; 1,613 t normal; 1,643 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (325.94 ft / 318.24 ft) x 63.98 ft x (4.27 / 4.33 ft)
   (99.35 m / 97.00 m) x 19.50 m  x (1.30 / 1.32 m)

Armament:
      2 - 1.97" / 50.0 mm 45.0 cal guns - 3.85lbs / 1.74kg shells, 250 per gun
     Quick firing guns in deck mounts, 1923 Model
     2 x Single mounts on centreline, evenly spread
      2 raised mounts
      4 - 0.59" / 15.0 mm 90.0 cal guns - 0.11lbs / 0.05kg shells, 4,000 per gun
     Machine guns in deck mounts, 1923 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      2 - 1.97" / 50.0 mm 45.0 cal guns - 3.86lbs / 1.75kg shells, 250 per gun
     Anti-air guns in deck mounts, 1923 Model
     2 x Single mounts on sides, aft deck forward
      2 raised mounts
      Weight of broadside 16 lbs / 7 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.98" / 25 mm   0.79" / 20 mm            -
   3rd:   0.79" / 20 mm   0.39" / 10 mm            -

Machinery:
   Diesel Internal combustion motors,
   Geared drive, 2 shafts, 1,234 shp / 920 Kw = 12.00 kts
   Range 1,200nm at 10.00 kts
   Bunker at max displacement = 68 tons

Complement:
   126 - 165

Cost:
   £0.177 million / $0.706 million

Distribution of weights at normal displacement:
   Armament: 4 tons, 0.2 %
      - Guns: 4 tons, 0.2 %
   Armour: 14 tons, 0.9 %
      - Armament: 14 tons, 0.9 %
   Machinery: 41 tons, 2.6 %
   Hull, fittings & equipment: 915 tons, 56.8 %
   Fuel, ammunition & stores: 73 tons, 4.6 %
   Miscellaneous weights: 565 tons, 35.0 %
      - Hull below water: 13 tons
      - Hull above water: 260 tons
      - On freeboard deck: 267 tons
      - Above deck: 25 tons

Fittings:
-25 t:  L/R wireless
-500 t:  Accommodation for 250 passengers (1,000 on a short-term run)
-27 t:  Deck cargo and weight reserve
-13 t:  Diesel engines

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     13,867 lbs / 6,290 Kg = 3,635.9 x 2.0 " / 50 mm shells or 5.3 torpedoes
   Stability (Unstable if below 1.00): 1.38
   Metacentric height 4.5 ft / 1.4 m
   Roll period: 12.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 80 %
         - Recoil effect (Restricted arc if above 1.00): 0.00
   Seaboat quality  (Average = 1.00): 1.00

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.650 / 0.652
   Length to Beam Ratio: 4.97 : 1
   'Natural speed' for length: 17.84 kts
   Power going to wave formation at top speed: 23 %
   Trim (Max stability = 0, Max steadiness = 100): 80
   Bow angle (Positive = bow angles forward): 10.00 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 %,  15.75 ft / 4.80 m,  11.81 ft / 3.60 m
      - Forward deck:   30.00 %,  11.81 ft / 3.60 m,  11.81 ft / 3.60 m
      - Aft deck:   40.00 %,  11.81 ft / 3.60 m,  11.81 ft / 3.60 m
      - Quarter deck:   10.00 %,  11.81 ft / 3.60 m,  11.81 ft / 3.60 m
      - Average freeboard:      12.13 ft / 3.70 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 29.0 %
      - Above water (accommodation/working, high = better): 278.5 %
   Waterplane Area: 15,597 Square feet or 1,449 Square metres
   Displacement factor (Displacement / loading): 240 %
   Structure weight / hull surface area: 53 lbs/sq ft or 258 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.97
      - Longitudinal: 1.28
      - Overall: 1.00
   Excellent machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

[The Rock Doctor]

A simple refurbishment of the Grenadjar class ACs would:

-Upgrade the 130mm secondary to QF guns, still in hull casemates
-Replace the 50mm battery with a few 100mm AA guns
-Add a few heavy machine guns for local security
-Put in new fire control
-Change the bunkerage over to oil-firing

Total cost would be $4.73 and 0.249 BP.

It doesn't radically improve the ship, but it does mean I can reasonably assign these to basic trade defence/secondary roles for the five to seven years before their replacements come along.  They'd still be a significant challenge for any protected/light/auxiliary cruiser or peer armored cruiser that came looking for trouble.

Enter ship name, Enter country Enter ship type laid down 1902

Displacement:
   13,914 t light; 14,481 t standard; 16,182 t normal; 17,543 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (492.13 ft / 492.13 ft) x 72.18 ft x (26.57 / 28.41 ft)
   (150.00 m / 150.00 m) x 22.00 m  x (8.10 / 8.66 m)

Armament:
      8 - 7.87" / 200 mm 45.0 cal guns - 246.19lbs / 111.67kg shells, 150 per gun
     Breech loading guns in turret on barbette mounts, 1902 Model
     2 x Twin mounts on centreline ends, evenly spread
     4 x Single mounts on sides, evenly spread
      12 - 5.12" / 130 mm 45.0 cal guns - 67.62lbs / 30.67kg shells, 150 per gun
     Quick firing guns in casemate mounts, 1902 Model
     12 x Single mounts on sides, evenly spread
      12 hull mounts in casemates- Limited use in heavy seas
      4 - 3.94" / 100 mm 45.0 cal guns - 30.77lbs / 13.96kg shells, 150 per gun
     Anti-air guns in deck mounts, 1902 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      6 - 0.59" / 15.0 mm 45.0 cal guns - 0.10lbs / 0.05kg shells, 4,000 per gun
     Machine guns in deck mounts, 1902 Model
     6 x Single mounts on sides, evenly spread
      6 raised mounts
      Weight of broadside 2,905 lbs / 1,318 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   5.91" / 150 mm   360.89 ft / 110.00 m   11.81 ft / 3.60 m
   Ends:   1.97" / 50 mm   131.20 ft / 39.99 m   11.81 ft / 3.60 m
   Upper:   3.94" / 100 mm   319.88 ft / 97.50 m   11.81 ft / 3.60 m
     Main Belt covers 113 % 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:   1.97" / 50 mm   0.79" / 20 mm      3.94" / 100 mm
   3rd:   0.79" / 20 mm   0.79" / 20 mm            -

   - Armoured deck - multiple decks:
   For and Aft decks: 2.36" / 60 mm
   Forecastle: 1.18" / 30 mm  Quarter deck: 2.36" / 60 mm

   - Conning towers: Forward 7.87" / 200 mm, Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, complex reciprocating steam engines,
   Direct drive, 4 shafts, 32,172 ihp / 24,000 Kw = 22.42 kts
   Range 13,400nm at 10.00 kts
   Bunker at max displacement = 3,062 tons

Complement:
   716 - 932

Cost:
   £1.337 million / $5.347 million

Distribution of weights at normal displacement:
   Armament: 679 tons, 4.2 %
      - Guns: 679 tons, 4.2 %
   Armour: 3,964 tons, 24.5 %
      - Belts: 1,815 tons, 11.2 %
      - Armament: 947 tons, 5.8 %
      - Armour Deck: 1,094 tons, 6.8 %
      - Conning Tower: 109 tons, 0.7 %
   Machinery: 4,431 tons, 27.4 %
   Hull, fittings & equipment: 4,439 tons, 27.4 %
   Fuel, ammunition & stores: 2,268 tons, 14.0 %
   Miscellaneous weights: 401 tons, 2.5 %
      - Hull above water: 50 tons
      - On freeboard deck: 351 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     16,755 lbs / 7,600 Kg = 68.6 x 7.9 " / 200 mm shells or 1.8 torpedoes
   Stability (Unstable if below 1.00): 1.33
   Metacentric height 5.1 ft / 1.6 m
   Roll period: 13.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.30
   Seaboat quality  (Average = 1.00): 1.55

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.600 / 0.608
   Length to Beam Ratio: 6.82 : 1
   'Natural speed' for length: 22.18 kts
   Power going to wave formation at top speed: 51 %
   Trim (Max stability = 0, Max steadiness = 100): 45
   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,  19.69 ft / 6.00 m
      - Forward deck:   30.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Aft deck:   35.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Quarter deck:   15.00 %,  19.69 ft / 6.00 m,  19.69 ft / 6.00 m
      - Average freeboard:      19.69 ft / 6.00 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 102.9 %
      - Above water (accommodation/working, high = better): 136.0 %
   Waterplane Area: 25,979 Square feet or 2,414 Square metres
   Displacement factor (Displacement / loading): 105 %
   Structure weight / hull surface area: 122 lbs/sq ft or 596 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.03
      - Longitudinal: 1.96
      - Overall: 1.10
   Adequate machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Warning: Date too early for anti-air gun - 3rd Battery okay look we've talked about this

[Jefgte]

The cost is reasonable for escort work.
Increasing speed seems difficult for this 20yo, 150m hull.

;)

[The Rock Doctor]

I can get her up to 26 knots, but the costs go up as well.

[Jefgte]

I can get her up to 26 knots, but the costs go up as well.

Climb to 25.6 kts like Lucznik class to use these 4 AC together.

Just an idea.
;)

[The Rock Doctor]

We've considered that angle before, and it bumps the cost up to around $11 and 4 BP, which seems a bit excessive for a broadside of six 8" and twenty-six knots.

This will do for now.  I reckon the class will be replaced by more razee-style "armored cruisers" later in the 1920s.

[The Rock Doctor]

Union designers, finding themselves with not a lot of pressing tasks at the moment, churn out a 1924 emergency light cruiser.

The basic assumption is that the ship has to be completed in a year in order to replace war losses.  This limits light displacement to 3,000 tonnes.  That also offers a convenient break-point in hull strength limits.

The end result can be built in the Union's 150m slips.  The main sacrifice is, obviously, a complete lack of hull protection, but firepower, speed, and range are appropriate for capital ship screening duties.

A 32 knot ship can be built with six main guns on a similar hull, but the firepower trade-off might not be worth it.

Enter ship name, Enter country Enter ship type laid down 1924

Displacement:
   2,986 t light; 3,152 t standard; 3,662 t normal; 4,070 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (476.24 ft / 462.60 ft) x 42.65 ft x (14.44 / 15.57 ft)
   (145.16 m / 141.00 m) x 13.00 m  x (4.40 / 4.75 m)

Armament:
      8 - 5.12" / 130 mm 45.0 cal guns - 67.61lbs / 30.67kg shells, 250 per gun
     Quick firing guns in deck and hoist mounts, 1924 Model
     4 x 2-gun mounts on centreline, evenly spread
      2 raised mounts
      4 - 3.94" / 100 mm 45.0 cal guns - 30.77lbs / 13.96kg shells, 250 per gun
     Anti-air guns in deck mounts, 1924 Model
     4 x Single mounts on sides, evenly spread
      4 - 0.59" / 15.0 mm 90.0 cal guns - 0.12lbs / 0.05kg shells, 4,000 per gun
     Machine guns in deck mounts, 1924 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 664 lbs / 301 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.97" / 50 mm   0.98" / 25 mm      1.97" / 50 mm
   2nd:   0.79" / 20 mm   0.79" / 20 mm            -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 45,576 shp / 34,000 Kw = 31.51 kts
   Range 16,400nm at 10.00 kts
   Bunker at max displacement = 917 tons

Complement:
   234 - 305

Cost:
   £1.147 million / $4.586 million

Distribution of weights at normal displacement:
   Armament: 169 tons, 4.6 %
      - Guns: 169 tons, 4.6 %
   Armour: 55 tons, 1.5 %
      - Armament: 55 tons, 1.5 %
   Machinery: 1,492 tons, 40.7 %
   Hull, fittings & equipment: 1,125 tons, 30.7 %
   Fuel, ammunition & stores: 676 tons, 18.5 %
   Miscellaneous weights: 145 tons, 4.0 %
      - On freeboard deck: 65 tons
      - Above deck: 80 tons

Fittings:
-17 t:  Fire control
-25 t:  L/R wireless
-25 t:  Command facilities
-10 t:  Night-fighting doodads (all these are above deck)
-32 t:  2x4 21" heavyweight torpedoes
-36 t:  Weight reserve

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     1,611 lbs / 731 Kg = 24.0 x 5.1 " / 130 mm shells or 0.5 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 1.7 ft / 0.5 m
   Roll period: 13.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.60
   Seaboat quality  (Average = 1.00): 1.07

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.450 / 0.464
   Length to Beam Ratio: 10.85 : 1
   'Natural speed' for length: 21.51 kts
   Power going to wave formation at top speed: 58 %
   Trim (Max stability = 0, Max steadiness = 100): 65
   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 %,  23.95 ft / 7.30 m,  19.03 ft / 5.80 m
      - Forward deck:   30.00 %,  19.03 ft / 5.80 m,  19.03 ft / 5.80 m
      - Aft deck:   35.00 %,  11.15 ft / 3.40 m,  11.15 ft / 3.40 m
      - Quarter deck:   15.00 %,  11.15 ft / 3.40 m,  11.15 ft / 3.40 m
      - Average freeboard:      15.49 ft / 4.72 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 147.6 %
      - Above water (accommodation/working, high = better): 151.5 %
   Waterplane Area: 12,585 Square feet or 1,169 Square metres
   Displacement factor (Displacement / loading): 98 %
   Structure weight / hull surface area: 57 lbs/sq ft or 277 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.71
      - Longitudinal: 1.17
      - Overall: 0.75
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform