Vilnius Union Ships, 1920+: Electric Drive Boogaloo

[The Rock Doctor]

Refit of the Angstrom-class battleships:

-Add 1918 FC but just one set, not two.
-Add LR and a second SR radio. Can't believe I didn't have a LR set the first time.
-Replace 100mm, 50mm and 10mm batteries with 100mm AA and 15mm MG
-Add torpedo nets
-Squeeze a floatplane and powder-cat in-between the funnels
-Cosmetic/Superstructure alterations

I estimate the cost at $0.62/0.575 BP.  Will probably do two units in 2/24 and the other two in 1925.

Enter ship name, Enter country Enter ship type laid down 1913

Displacement:
   27,006 t light; 28,453 t standard; 30,005 t normal; 31,247 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (662.78 ft / 651.25 ft) x 95.14 ft x (28.25 / 29.21 ft)
   (202.02 m / 198.50 m) x 29.00 m  x (8.61 / 8.90 m)

Armament:
      9 - 13.78" / 350 mm 45.0 cal guns - 1,319.35lbs / 598.45kg shells, 100 per gun
     Breech loading guns in turret on barbette mounts, 1913 Model
     1 x Triple mount on centreline, forward deck forward
     2 x Triple mounts on centreline, aft evenly spread
      1 raised mount
      16 - 5.12" / 130 mm 45.0 cal guns - 67.61lbs / 30.67kg shells, 250 per gun
     Breech loading guns in casemate mounts, 1913 Model
     16 x Single mounts on sides, forward deck aft
      8 - 3.94" / 100.0 mm 45.0 cal guns - 30.77lbs / 13.96kg shells, 250 per gun
     Anti-air guns in deck mounts, 1913 Model
     8 x Single mounts on side ends, evenly spread
      8 raised mounts
      12 - 0.59" / 15.0 mm 90.0 cal guns - 0.12lbs / 0.05kg shells, 4,000 per gun
     Machine guns in deck mounts, 1913 Model
     6 x Twin mounts on side ends, majority forward
      6 double raised mounts
      Weight of broadside 13,203 lbs / 5,989 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13.8" / 350 mm   423.10 ft / 128.96 m   12.47 ft / 3.80 m
   Ends:   0.98" / 25 mm   227.79 ft / 69.43 m   12.47 ft / 3.80 m
     Main Belt covers 100 % of normal length

   - Torpedo Bulkhead:
      2.95" / 75 mm   423.10 ft / 128.96 m   26.64 ft / 8.12 m

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   15.7" / 400 mm   9.84" / 250 mm      13.8" / 350 mm
   2nd:   0.98" / 25 mm   0.98" / 25 mm      3.94" / 100 mm
   3rd:   0.79" / 20 mm   0.79" / 20 mm            -
   4th:   0.59" / 15 mm         -               -

   - Armoured deck - single deck: 3.54" / 90 mm For and Aft decks
   Forecastle: 2.95" / 75 mm  Quarter deck: 2.95" / 75 mm

   - Conning towers: Forward 13.78" / 350 mm,  Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 75,068 shp / 56,000 Kw = 25.84 kts
   Range 10,000nm at 10.00 kts
   Bunker at max displacement = 2,794 tons

Complement:
   1,139 - 1,481

Cost:
   £2.758 million / $11.033 million

Distribution of weights at normal displacement:
   Armament: 2,238 tons, 7.5 %
   Armour: 10,159 tons, 33.9 %
      - Belts: 3,241 tons, 10.8 %
      - Torpedo bulkhead: 1,231 tons, 4.1 %
      - Armament: 2,498 tons, 8.3 %
      - Armour Deck: 2,902 tons, 9.7 %
      - Conning Tower: 287 tons, 1.0 %
   Machinery: 2,942 tons, 9.8 %
   Hull, fittings & equipment: 10,789 tons, 36.0 %
   Fuel, ammunition & stores: 2,999 tons, 10.0 %
   Miscellaneous weights: 879 tons, 2.9 %
      - Hull above water: 199 tons
      - On freeboard deck: 230 tons
      - Above deck: 450 tons

Fittings:
-224 t:  1918 Fire Control (AD)
-25 t:  L/R wireless (AD)
-10 t:  S/R wireless back-up (AD)
-25 t:  Night-fighting doodads (AD)
-30 t:  Armed Floatplane and gunpowder catapult (AD)
-200 t:  Flag facilities (AD/FD)
-199 t:  Torpedo Nets (AW)
-196 t:  Weight reserve (mostly FD)

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     43,962 lbs / 19,941 Kg = 33.6 x 13.8 " / 350 mm shells or 7.5 torpedoes
   Stability (Unstable if below 1.00): 1.12
   Metacentric height 5.7 ft / 1.7 m
   Roll period: 16.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.75
   Seaboat quality  (Average = 1.00): 1.30

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.600 / 0.604
   Length to Beam Ratio: 6.84 : 1
   'Natural speed' for length: 25.52 kts
   Power going to wave formation at top speed: 51 %
   Trim (Max stability = 0, Max steadiness = 100): 54
   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 %,  28.22 ft / 8.60 m,  24.28 ft / 7.40 m
      - Forward deck:   40.00 %,  24.28 ft / 7.40 m,  24.28 ft / 7.40 m
      - Aft deck:   25.00 %,  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:      21.44 ft / 6.54 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 87.1 %
      - Above water (accommodation/working, high = better): 161.0 %
   Waterplane Area: 45,318 Square feet or 4,210 Square metres
   Displacement factor (Displacement / loading): 107 %
   Structure weight / hull surface area: 184 lbs/sq ft or 898 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.94
      - Longitudinal: 1.59
      - 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
   Good seaboat, rides out heavy weather easily

[The Rock Doctor]

Capital ship upgrades, primarily so I don't lose track of the list:

1921:  Wspanialy class battleships, basic refurb
1922/3:  Nieuguety class battleships, substantive refurb
1924:  Grenadjar class armored cruises, basic refurb
1924-5:  Angstrom class battleships, refit
1925-6:  Lucznick class armored cruisers, substantive refurb
1925-6:  Wrogi class battleships, basic refurb
1926:  Szermierz class armored cruisers, refit

Refit:  +new FC, new AA.  Torpedo nets and aircraft if appropriate and practical.  Possible superstructure adjustments
Basic Refurb:  +Change bunkerage to oil-firing
Substantive Refurb:  +New machinery

[The Rock Doctor]

Lesson learned from the World Cruise:  Get some decent depot ships fer cryin' out loud.  With some legs and some speed and enough guns to make a decent showing of defence.

So this big bad boy can basically support a modern capital ship, light cruiser, and four torpedo-boats, or some other combo of vessels, for a long, long time.

My H2/1924 report might be using a slightly different light displacement for the lead unit, which I'll fix if necessary for 1/25.

Home Depot, laid down 1924

Displacement:
   8,972 t light; 9,232 t standard; 10,118 t normal; 10,827 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (390.76 ft / 380.58 ft) x 62.34 ft x (22.97 / 24.33 ft)
   (119.10 m / 116.00 m) x 19.00 m  x (7.00 / 7.42 m)

Armament:
      4 - 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
     2 x 2-gun mounts on centreline, aft deck aft
      1 raised mount aft - superfiring
      4 - 3.94" / 100.0 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 amidships
      4 raised mounts
      12 - 0.59" / 15.0 mm 45.0 cal guns - 0.10lbs / 0.05kg shells, 4,000 per gun
     Machine guns in deck mounts, 1924 Model
     4 x Twin mounts on sides, evenly spread
      4 raised mounts
     4 x Single mounts on sides amidships
      Weight of broadside 395 lbs / 179 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.97" / 50 mm   1.18" / 30 mm      1.97" / 50 mm
   2nd:   0.79" / 20 mm   0.79" / 20 mm            -
   3rd:   0.59" / 15 mm         -               -

Machinery:
   Diesel Internal combustion generators,
   Electric motors, 2 shafts, 12,064 shp / 9,000 Kw = 18.23 kts
   Range 16,400nm at 10.00 kts
   Bunker at max displacement = 1,595 tons

Complement:
   503 - 655

Cost:
   £1.241 million / $4.965 million

Distribution of weights at normal displacement:
   Armament: 96 tons, 0.9 %
   Armour: 47 tons, 0.5 %
      - Armament: 47 tons, 0.5 %
   Machinery: 397 tons, 3.9 %
   Hull, fittings & equipment: 2,359 tons, 23.3 %
   Fuel, ammunition & stores: 1,146 tons, 11.3 %
   Miscellaneous weights: 6,073 tons, 60.0 %
      - Hull below water: 2,219 tons
      - Hull above water: 2,116 tons
      - On freeboard deck: 1,138 tons
      - Above deck: 600 tons

Fittings:
-219 t:  T-E machinery (BW)
-116 t:  Torpedo nets (AW)
-100 t:  Cargo handling gear (FD)
-25 t:  L/R wireless (AD)
-113 t:  Weight reserve (mostly AD)
-5,500 t:  Supply/support for 55,000 t of warships (2/2/1/0.5 from bottom to top)


Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     18,185 lbs / 8,249 Kg = 271.3 x 5.1 " / 130 mm shells or 2.6 torpedoes
   Stability (Unstable if below 1.00): 1.20
   Metacentric height 3.4 ft / 1.0 m
   Roll period: 14.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.10
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has raised forecastle, rise aft of midbreak, low quarterdeck ,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.650 / 0.657
   Length to Beam Ratio: 6.11 : 1
   'Natural speed' for length: 19.51 kts
   Power going to wave formation at top speed: 50 %
   Trim (Max stability = 0, Max steadiness = 100): 35
   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 %,  29.86 ft / 9.10 m,  24.93 ft / 7.60 m
      - Forward deck:   30.00 %,  17.06 ft / 5.20 m,  17.06 ft / 5.20 m
      - Aft deck:   35.00 %,  24.93 ft / 7.60 m,  24.93 ft / 7.60 m
      - Quarter deck:   15.00 %,  17.06 ft / 5.20 m,  17.06 ft / 5.20 m
      - Average freeboard:      21.78 ft / 6.64 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 63.4 %
      - Above water (accommodation/working, high = better): 146.6 %
   Waterplane Area: 18,174 Square feet or 1,688 Square metres
   Displacement factor (Displacement / loading): 140 %
   Structure weight / hull surface area: 82 lbs/sq ft or 401 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.88
      - Longitudinal: 2.92
      - 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

[The Rock Doctor]

Lucznik before and after her impending 1925 refurbishment.

The main battery layout poses a significant challenge to adding fittings and the solution is that most of it has to be above the main battery.

The new 4" AA battery is two decks up, the 15mm twin MGs are on centreline turret roofs and in superstructure, and the aircraft cats are on top of the amidships turrets.  They're a bit shorter than others I've drawn in order to (theoretically) allow the turrets to train in their usual arcs without bashing catapults into funnels. 

The cranes and boats really should've been in the top image but whatever.  The cranes are likely close to the funnel to limit their impact on firing arcs, and the boats would probably be landed or tossed overboard if there's a serious expectation that the guns are going to blow them to splinters during a battle or shoot-ex.

Similar challenges will be encountered when refurbishing the Wrogi class battleships a little later.  They might even be worse.

[Kaiser Kirk]

Fittings:
-219 t:  T-E machinery (BW)
-116 t:  Torpedo nets (AW)
-100 t:  Cargo handling gear (FD)
-25 t:  L/R wireless (AD)
-113 t:  Weight reserve (mostly AD)
-5,500 t:  Supply/support for 55,000 t of warships (2/2/1/0.5 from bottom to top)

Torpedo nets?  Does this mean Parthia is at the vanguard of retro-ship fashion ?

On the T-E, the way Ship design is set up, there's 2 'costs' - one for the TE the other for the Diesel.
It would be appreciated if the Misc wt. 'payments' were accounted for separately.

Electric Drives: Take an additional 25% of engine weight in misc weight and provides a 15% bonus to range plus improved compartmentalization (effects number of torpedo hits to sink)
Hydraulic Drives: Takes an additional 10% of engine weight in misc weight and provides a 5% bonus to range.
Geared Drives: Provides a 10% bonus to range.
Diesel Engines: Diesel engines can be used as part of mixed drive units or standalone power. Takes an additional 30% of engine weight in misc weight and provides a 75% bonus to range. Can be combined with Electric, Hydraulic or Geared drives (Bonus and penalties stack).

[The Rock Doctor]

Torpedo nets are the in-thing, baby.

To clarify, the engine notation is the sum of diesel and electric drive costs but not accurately labeled as such.  You prefer seperate listings for each of diesel and electric?

[Kaiser Kirk]

It would help avoid the question reoccuring :)

[The Rock Doctor]

The 1925 light cruiser is just the 1923 light cruiser with slightly more efficient machinery, heavier AA armament, and improved aviation facilities.  This has required some shifting around of fittings amidships to accommodate the hangers on either side of the aft funnel and the additional AA gun on either side of the forward superstructure.

Given that there were three of the Rhein class and the Union likes to build in pairs, a run of three or five is anticipated for this type.

Enter ship name, Enter country Enter ship type laid down 1925

Displacement:
   7,919 t light; 8,246 t standard; 9,142 t normal; 9,859 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (592.02 ft / 577.43 ft) x 57.74 ft x (21.33 / 22.51 ft)
   (180.45 m / 176.00 m) x 17.60 m  x (6.50 / 6.86 m)

Armament:
      8 - 5.91" / 150 mm 45.0 cal guns - 103.86lbs / 47.11kg shells, 250 per gun
     Breech loading guns in turret on barbette mounts, 1925 Model
     4 x 2-gun mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
      6 - 3.94" / 100.0 mm 45.0 cal guns - 30.77lbs / 13.96kg shells, 250 per gun
     Anti-air guns in deck mounts, 1925 Model
     6 x Single mounts on side ends, majority aft
      12 - 0.59" / 15.0 mm 45.0 cal guns - 0.10lbs / 0.05kg shells, 4,000 per gun
     Machine guns in deck mounts, 1925 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
     4 x Twin mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 1,017 lbs / 461 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.54" / 90 mm   390.42 ft / 119.00 m   16.37 ft / 4.99 m
   Ends:   Unarmoured
     Main Belt covers 104 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   5.91" / 150 mm   0.98" / 25 mm      3.54" / 90 mm
   2nd:   0.79" / 20 mm   0.79" / 20 mm            -
   3rd:   0.59" / 15 mm         -               -

   - Armoured deck - multiple decks: 0.98" / 25 mm For and Aft decks
   Forecastle: 0.98" / 25 mm  Quarter deck: 0.98" / 25 mm

   - Conning towers: Forward 3.54" / 90 mm,  Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 79,089 shp / 59,000 Kw = 32.03 kts
   Range 16,400nm at 10.00 kts
   Bunker at max displacement = 1,613 tons

Complement:
   466 - 607

Cost:
   £2.371 million / $9.483 million

Distribution of weights at normal displacement:
   Armament: 272 tons, 3.0 %
   Armour: 1,593 tons, 17.4 %
      - Belts: 920 tons, 10.1 %
      - Armament: 249 tons, 2.7 %
      - Armour Deck: 390 tons, 4.3 %
      - Conning Tower: 33 tons, 0.4 %
   Machinery: 2,568 tons, 28.1 %
   Hull, fittings & equipment: 3,163 tons, 34.6 %
   Fuel, ammunition & stores: 1,223 tons, 13.4 %
   Miscellaneous weights: 323 tons, 3.5 %
      - On freeboard deck: 173 tons
      - Above deck: 150 tons

Fittings:
-28 t:  1918 fire control (AD)
-50 t:  Command facilities (AD)
-25 t:  L/R wireless (AD)
-25 t:  Nightfighting doodads (AD)
-55 t:  2 armed floatplane and catapult (w/hangers beside aft funnel (FD)
-32 t:  2x4 530mm torpedos (no reloads) (FD)
-108 t:  Weight reserve (mostly FD)

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     10,050 lbs / 4,559 Kg = 97.6 x 5.9 " / 150 mm shells or 1.4 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 2.6 ft / 0.8 m
   Roll period: 14.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 61 %
         - Recoil effect (Restricted arc if above 1.00): 0.30
   Seaboat quality  (Average = 1.00): 1.08

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.450 / 0.460
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 24.03 kts
   Power going to wave formation at top speed: 55 %
   Trim (Max stability = 0, Max steadiness = 100): 56
   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 %,  26.57 ft / 8.10 m,  21.65 ft / 6.60 m
      - Forward deck:   30.00 %,  21.65 ft / 6.60 m,  21.65 ft / 6.60 m
      - Aft deck:   35.00 %,  13.78 ft / 4.20 m,  13.78 ft / 4.20 m
      - Quarter deck:   15.00 %,  13.78 ft / 4.20 m,  13.78 ft / 4.20 m
      - Average freeboard:      18.11 ft / 5.52 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 101.2 %
      - Above water (accommodation/working, high = better): 151.4 %
   Waterplane Area: 21,268 Square feet or 1,976 Square metres
   Displacement factor (Displacement / loading): 116 %
   Structure weight / hull surface area: 95 lbs/sq ft or 466 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.32
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent

Pic, with 1923 above and 1925 below.

[The Rock Doctor]

I'll fix the AA gun placement later - drawing is correct, sim is incorrect with regard to 4" placement.

[Kaiser Kirk]

Given that there were three of the Rhein class and the Union likes to build in pairs, a run of three or five is anticipated for this type.

What !
Consistency ?
What have we come to ?
Quite fast though, I don't have anything that fast.....which means I'm loosing !

The comparables would be the Norse Valkyrie class, which is smaller and slower, and the Roman Isca which is slower and slightly worse protected, but matches the Aztec/Parthian/Byzantine 180-19 range.

Deck armor vs longer ranges,  or even splinters would be my concern.
Ages ago some guidelines for splinters got put under the artillery research page - 1/6 diameter, which means the 25mm might be lacking if foes have over 150mm.

[The Rock Doctor]

Deck armor is definitely the weak point.  I suppose I could use some weight reserve and shave the belt length to bump it up to 30mm.  Did the same with the main battery turret roofs.

Speed's need to ride herd on the fast capital ships.  I ran some range calculations and included them at the bottom of the report.

Enter ship name, Enter country Enter ship type laid down 1925

Displacement:
   7,919 t light; 8,246 t standard; 9,142 t normal; 9,859 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (592.02 ft / 577.43 ft) x 57.74 ft x (21.33 / 22.51 ft)
   (180.45 m / 176.00 m) x 17.60 m  x (6.50 / 6.86 m)

Armament:
      8 - 5.91" / 150 mm 45.0 cal guns - 103.86lbs / 47.11kg shells, 250 per gun
     Breech loading guns in turret on barbette mounts, 1925 Model
     4 x 2-gun mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
      6 - 3.94" / 100.0 mm 45.0 cal guns - 30.77lbs / 13.96kg shells, 250 per gun
     Anti-air guns in deck mounts, 1925 Model
     6 x Single mounts on side ends, majority forward
      12 - 0.59" / 15.0 mm 45.0 cal guns - 0.10lbs / 0.05kg shells, 4,000 per gun
     Machine guns in deck mounts, 1925 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
     4 x Twin mounts on sides amidships
      4 double raised mounts
      Weight of broadside 1,017 lbs / 461 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.54" / 90 mm   383.86 ft / 117.00 m   16.37 ft / 4.99 m
   Ends:   Unarmoured
     Main Belt covers 102 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   5.91" / 150 mm   1.18" / 30 mm      3.54" / 90 mm
   2nd:   0.79" / 20 mm   0.79" / 20 mm            -
   3rd:   0.59" / 15 mm         -               -

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

   - Conning towers: Forward 3.54" / 90 mm,  Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 79,089 shp / 59,000 Kw = 32.03 kts
   Range 16,400nm at 10.00 kts
   Bunker at max displacement = 1,613 tons

Complement:
   466 - 607

Cost:
   £2.371 million / $9.483 million

Distribution of weights at normal displacement:
   Armament: 272 tons, 3.0 %
   Armour: 1,665 tons, 18.2 %
      - Belts: 907 tons, 9.9 %
      - Armament: 255 tons, 2.8 %
      - Armour Deck: 468 tons, 5.1 %
      - Conning Tower: 33 tons, 0.4 %
   Machinery: 2,568 tons, 28.1 %
   Hull, fittings & equipment: 3,166 tons, 34.6 %
   Fuel, ammunition & stores: 1,223 tons, 13.4 %
   Miscellaneous weights: 249 tons, 2.7 %
      - On freeboard deck: 109 tons
      - Above deck: 140 tons

Fittings:
-28 t:  1918 fire control (AD)
-50 t:  Command facilities (AD)
-25 t:  L/R wireless (AD)
-25 t:  Nightfighting doodads (AD)
-55 t:  2 armed floatplane and catapult (w/hangers beside aft funnel (FD)
-32 t:  2x4 530mm torpedos (no reloads) (FD)
-34 t:  Weight reserve (mostly AD)

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     10,119 lbs / 4,590 Kg = 98.3 x 5.9 " / 150 mm shells or 1.4 torpedoes
   Stability (Unstable if below 1.00): 1.12
   Metacentric height 2.7 ft / 0.8 m
   Roll period: 14.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 60 %
         - Recoil effect (Restricted arc if above 1.00): 0.30
   Seaboat quality  (Average = 1.00): 1.08

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.450 / 0.460
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 24.03 kts
   Power going to wave formation at top speed: 55 %
   Trim (Max stability = 0, Max steadiness = 100): 55
   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 %,  26.57 ft / 8.10 m,  21.65 ft / 6.60 m
      - Forward deck:   30.00 %,  21.65 ft / 6.60 m,  21.65 ft / 6.60 m
      - Aft deck:   35.00 %,  13.78 ft / 4.20 m,  13.78 ft / 4.20 m
      - Quarter deck:   15.00 %,  13.78 ft / 4.20 m,  13.78 ft / 4.20 m
      - Average freeboard:      18.11 ft / 5.52 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 101.2 %
      - Above water (accommodation/working, high = better): 151.4 %
   Waterplane Area: 21,268 Square feet or 1,976 Square metres
   Displacement factor (Displacement / loading): 116 %
   Structure weight / hull surface area: 96 lbs/sq ft or 467 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.96
      - Longitudinal: 1.31
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent

960nm @ 32 kts
1170nm @ 30 kts
1960nm @ 25 kts
3510nm @ 20 kts
6930nm @ 15 kts

[Kaiser Kirk]

Cool, thanks for the range calcs.
I find when I wind up doing the wars, I presume the cruise speed is the cruise speed,
and so figure time on station and all that from there...in part because it's a real hassle
to sim the hull and try to find the adjusted range.
So seeing the 'options' is helpful :)

[The Rock Doctor]

I might run a few different ships and see if there's a reliable pattern to identify.

[The Rock Doctor]

A smaller, cheaper, unarmored carrier...I suppose a sea control ship, not that there's much controlling going on.  The basic requirement is to provide some surface ships with basic air support - a half-dozen fighters for local protection, and a half-dozen scout-bombers for eyeballing the area around the surface ships.  The expected environment is the mid-Atlantic, so open water and decent weather compared to the North Atlantic or North Sea.

It's a quantity > quality argument in this case, having basic aviation capability in a number of places versus the much greater individual capability of a ship twice the size.

The flight deck is CVE-sized so it can handle anything likely to be in service during its career, and the speed will help get things launched and recovered.  Weight allows for twelve aircraft at all stages of the expected service life.

Protection is virtually nil; a bit of protection for the folks operating the ship and a box around the boom.  AA armament is reasonable for time and period, while the anti-surface defence is a sternchaser to plunk at destroyers and lighter stuff while running away.  In theory the carrier would be operating with cruisers or capital ships anyway, and they should be dealing with that sort of thing.

Enter ship name, Enter country Enter ship type laid down 1925

Displacement:
   6,998 t light; 7,198 t standard; 8,064 t normal; 8,757 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (501.08 ft / 485.56 ft) x 59.06 ft x (19.69 / 20.95 ft)
   (152.73 m / 148.00 m) x 18.00 m  x (6.00 / 6.39 m)

Armament:
      2 - 5.12" / 130 mm 45.0 cal guns - 67.61lbs / 30.67kg shells, 250 per gun
     Quick firing guns in deck and hoist mount, 1925 Model
     1 x 2-gun mount on centreline, aft deck aft
      4 - 3.94" / 100.0 mm 45.0 cal guns - 30.77lbs / 13.96kg shells, 250 per gun
     Anti-air guns in deck and hoist mounts, 1925 Model
     4 x Single mounts on sides, evenly spread
      8 - 0.59" / 15.0 mm 90.0 cal guns - 0.12lbs / 0.05kg shells, 4,000 per gun
     Machine guns in deck mounts, 1925 Model
     4 x Twin mounts on sides, evenly spread
      Weight of broadside 259 lbs / 118 kg

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.97" / 50 mm   1.18" / 30 mm      1.97" / 50 mm
   2nd:   0.79" / 20 mm   0.79" / 20 mm            -
   3rd:   0.59" / 15 mm         -               -

   - Box over magazines: 1.97" / 50 mm

   - Conning towers: Forward 0.98" / 25 mm,  Aft 0.00" / 0 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 64,344 shp / 48,000 Kw = 30.07 kts
   Range 18,000nm at 10.00 kts
   Bunker at max displacement = 1,559 tons

Complement:
   425 - 553

Cost:
   £1.841 million / $7.365 million

Distribution of weights at normal displacement:
   Armament: 71 tons, 0.9 %
   Armour: 80 tons, 1.0 %
      - Armament: 32 tons, 0.4 %
      - Armour Deck: 39 tons, 0.5 %
      - Conning Tower: 9 tons, 0.1 %
   Machinery: 2,089 tons, 25.9 %
   Hull, fittings & equipment: 3,383 tons, 42.0 %
   Fuel, ammunition & stores: 1,066 tons, 13.2 %
   Miscellaneous weights: 1,375 tons, 17.1 %
      - Hull below water: 570 tons
      - Hull above water: 570 tons
      - On freeboard deck: 35 tons
      - Above deck: 200 tons

Fittings:
-1140 t:  14 or 12 aircraft, depending on the generation embarked
-25 t:  Single catapult (FD)
-8 t:  1918 fire control (AD)
-35 t:  L/R and extra S/R wireless (AD)
-100 t:  Flight operations and command facilities (AD)
-25 t:  Nightfighting doodads (AD)
-42 t:  Weight reserve (FD and AD)

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     12,962 lbs / 5,879 Kg = 193.4 x 5.1 " / 130 mm shells or 1.5 torpedoes
   Stability (Unstable if below 1.00): 1.23
   Metacentric height 3.3 ft / 1.0 m
   Roll period: 13.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.11
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has low forecastle,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.500 / 0.510
   Length to Beam Ratio: 8.22 : 1
   'Natural speed' for length: 22.04 kts
   Power going to wave formation at top speed: 61 %
   Trim (Max stability = 0, Max steadiness = 100): 35
   Bow angle (Positive = bow angles forward): 20.00 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 %,  24.61 ft / 7.50 m,  20.67 ft / 6.30 m
      - Forward deck:   30.00 %,  30.84 ft / 9.40 m,  30.84 ft / 9.40 m
      - Aft deck:   35.00 %,  30.84 ft / 9.40 m,  30.84 ft / 9.40 m
      - Quarter deck:   15.00 %,  30.84 ft / 9.40 m,  30.84 ft / 9.40 m
      - Average freeboard:      29.12 ft / 8.88 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 102.9 %
      - Above water (accommodation/working, high = better): 264.1 %
   Waterplane Area: 19,105 Square feet or 1,775 Square metres
   Displacement factor (Displacement / loading): 137 %
   Structure weight / hull surface area: 84 lbs/sq ft or 409 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.82
      - Longitudinal: 5.96
      - 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
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

[Kaiser Kirk]

With the early 20s prep and launch rates, I think that's mainly going to launch a handful of scouts. Which could be fine.
It's got half the airgroup of my 8500 ton ship, which was limited as it is.

As for defensive armanent, my carrier reading is limited, but I have read that at least in the USN,
because of limited plane ranges, the carriers were operating close up, and in wargames
could be caught by cruisers/DD.  30 knots is good, but by now you know the Norse Valkyrie
class is out there, and capable of 32 knots with 4x 155 bearing forward.

I do think folks have been spoiled by the good weather that has blessed battles to date.
In bad weather folks have mostly missed engaging since the effective search ranges contract.