Vilnius Union Ships, 1920+: Electric Drive Boogaloo

[Kaiser Kirk]

There is some combo on my laptop that deletes what I was typing. Dunno what it is but ...grrr.

Arms choices.

A I like best.

I presume C is for running
But at 32 knots and carrier freeboards, hard for the Norse to catch.

B is better for killing destroyers in various arcs.
Which I think is more useful. 

Sims..
I had not known the Essex had a 6" gun at some point.
This does rather highlight an omission in the Flight Deck Cruiser rules.
Yes, we can point to the 8" turrets on Saratoga and I guess the 6? planned for Essex, but they were both twice the size of this.
Further we know that there were concerns with cross deck fire on Saratoga,  and no Essex was actually built with 6".
Plus technically, Saratoga falls under the conversion rules.

Then there's SIM issues - first the barbettes should take up what otherwise would be hanger space,
and due to the height of the flightdeck, should probably be 'double superimposed'.
Add in the surrounding deck structures help brace the barbettes, and more space is lost.
Ultimately, Essex was built with 5" M&H which avoids these problems,
while the Conversion rule absorbs it on Saratoga.

I think if you're pushing into guns needing turrets, then you're wandering out of straight carrier designs.
However, we developed the carrier rules as a group, so this should be more a discussion point as how to best address it.
As Foxxy likes to point out, we want to allow innovation and thinking out of the box....which is why we have a flight deck option. 

[Jefgte]

I also hesitate to install 191 or 152 in casemates on my next 15000t CV.
Artillery against DDs should be enough, so 152.
Other ships in the fleet must provide CV protection.

[The Rock Doctor]

I'm guilty of poor phrasing - merely meant i was sticking 6" in the same location that Essex had her 5".

Did not mean to imply Essex was designed to ship 6" herself...

[The Rock Doctor]

I agree the armament doesn't fit neatly into our existing guidelines/rules.  If we take any turreted weapon as requiring a flight-deck cruiser, that's fine. 

[Kaiser Kirk]

I agree the armament doesn't fit neatly into our existing guidelines/rules.  If we take any turreted weapon as requiring a flight-deck cruiser, that's fine.

It's my inclination to require any Turret & Barbette to use either the 'conversion' (even if new built) or 'flight deck cruiser' aspects.
The practical reason extend beyond just the additional structure already mentioned, there were also substantial recoil
stresses with larger guns, so the hull structure 'scantlings' seem to have been heavier as well.

That does seem to be overkill for 6" turrets...but not for 10"...but if the 6" are "Mount and Hoist" the matter is resolved... until some wants a faithful rendition of Saratoga :)

...that said, I really don't want to just make a declaration here.  We built the aviation ship rules in good faith, and they seem to be fairly well done. But if we find unworkable bits, we should be looking to fix them.

[The Rock Doctor]

I confess to contemplating 10"-armed carriers, but I had those firmly in the flight deck carrier camp.

[The Rock Doctor]

Been tinkering with the carrier option.

Reduced the belt height and deck thickness, and reduced the 130mm anti-surface battery in exchange for (effectively) four more aircraft and a bit more of a weight reserve.  There just isn't room to fit in a TDS.  I'd need to add at least 1,000 t to her for that.

I can't help but compare this to a Ryujo, Ranger, or Wasp and think "they have so many more planes".  On the other hand Ryujo was overbuilt and had no armor whatsoever, while Ranger and Wasp were both slower and unprotected.  If I want to make those same decisions, I'll get similar results, but my calculus is pointing toward speed and protection as priorities.

Enter ship name, Enter country Enter ship type laid down 1928

Displacement:
   14,994 t light; 15,507 t standard; 16,872 t normal; 17,963 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (650.12 ft / 626.97 ft) x 82.02 ft x (22.97 / 24.08 ft)
   (198.16 m / 191.10 m) x 25.00 m  x (7.00 / 7.34 m)

Armament:
      6 - 5.12" / 130 mm 45.0 cal guns - 67.61lbs / 30.67kg shells, 400 per gun
     Quick firing guns in deck and hoist mounts, 1928 Model
     2 x 2-gun mounts on sides, aft deck centre
     1 x 2-gun mount on centreline, aft deck aft
      8 - 3.94" / 100.0 mm 45.0 cal guns - 30.77lbs / 13.96kg shells, 400 per gun
     Breech loading guns in deck mounts, 1928 Model
     8 x Single mounts on sides, evenly spread
      12 - 1.97" / 50.0 mm 45.0 cal guns - 3.85lbs / 1.75kg shells, 1,000 per gun
     Anti-air guns in deck mounts, 1928 Model
     6 x Twin mounts on sides, evenly spread
      16 - 0.59" / 15.0 mm 90.0 cal guns - 0.12lbs / 0.05kg shells, 5,000 per gun
     Machine guns in deck mounts, 1928 Model
     8 x Twin mounts on sides, evenly spread
      Weight of broadside 700 lbs / 317 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.54" / 90 mm   407.55 ft / 124.22 m   16.37 ft / 4.99 m
   Ends:   Unarmoured
     Main Belt covers 100 % of normal length

   - 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   0.59" / 15 mm            -
   3rd:   0.79" / 20 mm   0.59" / 15 mm            -
   4th:   0.59" / 15 mm         -               -

   - Armoured deck - single deck: 1.57" / 40 mm For and Aft decks
   Forecastle: 0.98" / 25 mm  Quarter deck: 1.57" / 40 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 119,303 shp / 89,000 Kw = 32.04 kts
   Range 18,000nm at 10.00 kts
   Bunker at max displacement = 2,456 tons

Complement:
   739 - 962

Cost:
   £4.195 million / $16.780 million

Distribution of weights at normal displacement:
   Armament: 158 tons, 0.9 %
   Armour: 2,060 tons, 12.2 %
      - Belts: 999 tons, 5.9 %
      - Armament: 88 tons, 0.5 %
      - Armour Deck: 973 tons, 5.8 %
   Machinery: 3,714 tons, 22.0 %
   Hull, fittings & equipment: 5,937 tons, 35.2 %
   Fuel, ammunition & stores: 1,877 tons, 11.1 %
   Miscellaneous weights: 3,125 tons, 18.5 %
      - Hull below water: 1,346 tons
      - Hull above water: 1,330 tons
      - On freeboard deck: 199 tons
      - Above deck: 250 tons

Fittings:
-2,660 t:  Airgroup (33/28 A/C), BW/AW
-16 t:  4x1 530mm torpedoes, fixed astern, no reloads, BW
-16 t:  Fire control (AD)
-50 t:  L/R radio x 2 (AD)
-10 t:  Nightfighting doodads (AD)
-10 t:  Extra S/R radio (AD)
-100 t:  Flight operations facilities (AD)
-100 Flag facilities (FD)
-99 + 64 t:  Weight reserve (FD/AD)

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     27,405 lbs / 12,431 Kg = 408.8 x 5.1 " / 130 mm shells or 2.5 torpedoes
   Stability (Unstable if below 1.00): 1.25
   Metacentric height 5.6 ft / 1.7 m
   Roll period: 14.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 90 %
         - Recoil effect (Restricted arc if above 1.00): 0.08
   Seaboat quality  (Average = 1.00): 1.50

Hull form characteristics:
   Hull has low forecastle,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.500 / 0.508
   Length to Beam Ratio: 7.64 : 1
   'Natural speed' for length: 25.04 kts
   Power going to wave formation at top speed: 58 %
   Trim (Max stability = 0, Max steadiness = 100): 60
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 13.12 ft / 4.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  27.56 ft / 8.40 m,  21.65 ft / 6.60 m
      - Forward deck:   40.00 %,  29.53 ft / 9.00 m,  29.53 ft / 9.00 m
      - Aft deck:   25.00 %,  29.53 ft / 9.00 m,  29.53 ft / 9.00 m
      - Quarter deck:   15.00 %,  29.53 ft / 9.00 m,  29.53 ft / 9.00 m
      - Average freeboard:      28.43 ft / 8.66 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 93.0 %
      - Above water (accommodation/working, high = better): 260.8 %
   Waterplane Area: 34,263 Square feet or 3,183 Square metres
   Displacement factor (Displacement / loading): 129 %
   Structure weight / hull surface area: 111 lbs/sq ft or 543 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.92
      - Longitudinal: 2.11
      - 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

WP Area allows:  48 planes
2660 t allows:  33 or 28 planes

[The Rock Doctor]

The drawing's what I was aiming for yet makes me think a lot of Yorktown, which I've actually always thought were not attractive ships.

[TacCovert4]

Yeah, it's your speed that hurts you.  The Martinique is a touch lighter, with an airgroup of 40 birds at the heavier weight calculation (I'm treating it the same as a nod to some inefficiencies in the Aztec system early on that get fixed about the same time aircraft get significantly heavier).  My belt is only a touch lighter, but I have end belts, my deck is 50% thicker, and I'm running a full-up armament on her. 

But she's 3 knots slower. 

It's just that floating tipping point......where hullform and engine technology no longer help each other.....and you start having to pack on serious engine tonnage to get that speed.

[Kaiser Kirk]

I rather like the Yorktown look. Though I prefer the Implacable's deck edge twin 4.5" AA mounts.

Generally speaking, I don't view Japanese ships as reasonable models. They mistated the weights, skimped on the structure, and kept having to take their ships back in and rebuild them, coming out heavier with changed characteristics. 
Ranger and Wasp benefit from a few more years of engine technology ...and I would not be shocked if the USN plants had better power to wieght that SS models. As I recall from poking about to make the rules, for Ryujo and Ranger (dunno Wasp) the listed airgroup was larger than what they found practicable.

[The Rock Doctor]

Found I could add a bit of length/depth and subtract a bit of width, which reduces the machinery load and lets me put TWO MORE PLANES aboard.  So 35 or 30.  I'm happier with that.

Enter ship name, Enter country Enter ship type laid down 1928

Displacement:
   14,994 t light; 15,507 t standard; 16,881 t normal; 17,980 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (668.41 ft / 645.01 ft) x 75.46 ft x (24.28 / 25.46 ft)
   (203.73 m / 196.60 m) x 23.00 m  x (7.40 / 7.76 m)

Armament:
      6 - 5.12" / 130 mm 45.0 cal guns - 67.61lbs / 30.67kg shells, 400 per gun
     Quick firing guns in deck and hoist mounts, 1928 Model
     2 x 2-gun mounts on sides, aft deck centre
     1 x 2-gun mount on centreline, aft deck aft
      8 - 3.94" / 100.0 mm 45.0 cal guns - 30.77lbs / 13.96kg shells, 400 per gun
     Breech loading guns in deck mounts, 1928 Model
     8 x Single mounts on sides, evenly spread
      12 - 1.97" / 50.0 mm 45.0 cal guns - 3.85lbs / 1.75kg shells, 1,000 per gun
     Anti-air guns in deck mounts, 1928 Model
     6 x Twin mounts on sides, evenly spread
      16 - 0.59" / 15.0 mm 90.0 cal guns - 0.12lbs / 0.05kg shells, 5,000 per gun
     Machine guns in deck mounts, 1928 Model
     8 x Twin mounts on sides, evenly spread
      Weight of broadside 700 lbs / 317 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.54" / 90 mm   419.26 ft / 127.79 m   16.37 ft / 4.99 m
   Ends:   Unarmoured
     Main Belt covers 100 % of normal length

   - 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   0.59" / 15 mm            -
   3rd:   0.79" / 20 mm   0.59" / 15 mm            -
   4th:   0.59" / 15 mm         -               -

   - Armoured deck - single deck: 1.57" / 40 mm For and Aft decks
   Forecastle: 0.98" / 25 mm  Quarter deck: 1.57" / 40 mm

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 115,281 shp / 86,000 Kw = 32.01 kts
   Range 18,000nm at 10.00 kts
   Bunker at max displacement = 2,473 tons

Complement:
   739 - 962

Cost:
   £4.128 million / $16.512 million

Distribution of weights at normal displacement:
   Armament: 158 tons, 0.9 %
   Armour: 2,023 tons, 12.0 %
      - Belts: 1,014 tons, 6.0 %
      - Armament: 88 tons, 0.5 %
      - Armour Deck: 921 tons, 5.5 %
   Machinery: 3,589 tons, 21.3 %
   Hull, fittings & equipment: 5,865 tons, 34.7 %
   Fuel, ammunition & stores: 1,887 tons, 11.2 %
   Miscellaneous weights: 3,359 tons, 19.9 %
      - Hull below water: 1,441 tons
      - Hull above water: 1,425 tons
      - On freeboard deck: 193 tons
      - Above deck: 300 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     27,479 lbs / 12,464 Kg = 409.9 x 5.1 " / 130 mm shells or 2.4 torpedoes
   Stability (Unstable if below 1.00): 1.31
   Metacentric height 5.3 ft / 1.6 m
   Roll period: 13.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.08
   Seaboat quality  (Average = 1.00): 1.76

Hull form characteristics:
   Hull has low forecastle,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.500 / 0.508
   Length to Beam Ratio: 8.55 : 1
   'Natural speed' for length: 25.40 kts
   Power going to wave formation at top speed: 56 %
   Trim (Max stability = 0, Max steadiness = 100): 40
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 13.12 ft / 4.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
      - Forecastle:   20.00 %,  28.22 ft / 8.60 m,  21.65 ft / 6.60 m
      - Forward deck:   40.00 %,  29.53 ft / 9.00 m,  29.53 ft / 9.00 m
      - Aft deck:   25.00 %,  29.53 ft / 9.00 m,  29.53 ft / 9.00 m
      - Quarter deck:   15.00 %,  29.53 ft / 9.00 m,  29.53 ft / 9.00 m
      - Average freeboard:      28.48 ft / 8.68 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 91.7 %
      - Above water (accommodation/working, high = better): 246.8 %
   Waterplane Area: 32,429 Square feet or 3,013 Square metres
   Displacement factor (Displacement / loading): 129 %
   Structure weight / hull surface area: 107 lbs/sq ft or 521 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.91
      - Longitudinal: 2.28
      - 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

WP Area allows:  46 planes
2660 t allows:  35 or 30 planes

[The Rock Doctor]

An armored gunboat designed primarily with an eye to close-in shore bombardment work.  The battery would also suffice to allow trade defence against surface and air threats but I'll have to do a little tweaking to shove an ASW load aboard too.

Enter ship name, Enter country Enter ship type laid down 1929

Displacement:
   1,798 t light; 1,919 t standard; 2,026 t normal; 2,111 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (303.57 ft / 295.28 ft) x 46.92 ft x (9.84 / 10.16 ft)
   (92.53 m / 90.00 m) x 14.30 m  x (3.00 / 3.10 m)

Armament:
      4 - 5.12" / 130 mm 45.0 cal guns - 67.61lbs / 30.67kg shells, 400 per gun
     Quick firing guns in deck and hoist mounts, 1929 Model
     2 x 2-gun mounts on centreline, evenly spread
      8 - 1.97" / 50.0 mm 60.0 cal guns - 4.18lbs / 1.90kg shells, 1,000 per gun
     Anti-air guns in deck mounts, 1929 Model
     2 x Twin mounts on sides, aft deck forward
     2 x Twin mounts on centreline, evenly spread
      2 raised mounts
      8 - 0.59" / 15.0 mm 90.0 cal guns - 0.12lbs / 0.05kg shells, 4,000 per gun
     Machine guns in deck mounts, 1929 Model
     4 x Single mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 305 lbs / 138 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   2.95" / 75 mm   191.93 ft / 58.50 m   11.81 ft / 3.60 m
   Ends:   1.18" / 30 mm   103.31 ft / 31.49 m   11.81 ft / 3.60 m
   Upper:   1.18" / 30 mm   191.93 ft / 58.50 m   7.87 ft / 2.40 m
     Main Belt covers 100 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   2.95" / 75 mm   1.18" / 30 mm      2.95" / 75 mm
   3rd:   0.79" / 20 mm   0.59" / 15 mm            -
   4th:   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 2.95" / 75 mm,  Aft 0.00" / 0 mm

Machinery:
   Diesel Internal combustion generators,
   Electric motors, 2 shafts, 6,970 shp / 5,200 Kw = 20.07 kts
   Range 5,000nm at 10.00 kts
   Bunker at max displacement = 192 tons

Complement:
   150 - 196

Cost:
   £0.486 million / $1.944 million

Distribution of weights at normal displacement:
   Armament: 82 tons, 4.0 %
   Armour: 644 tons, 31.8 %
      - Belts: 422 tons, 20.8 %
      - Armament: 39 tons, 1.9 %
      - Armour Deck: 173 tons, 8.5 %
      - Conning Tower: 10 tons, 0.5 %
   Machinery: 214 tons, 10.6 %
   Hull, fittings & equipment: 588 tons, 29.0 %
   Fuel, ammunition & stores: 228 tons, 11.3 %
   Miscellaneous weights: 270 tons, 13.3 %
      - Hull below water: 117 tons
      - Hull above water: 90 tons
      - On freeboard deck: 23 tons
      - Above deck: 40 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     3,859 lbs / 1,750 Kg = 57.6 x 5.1 " / 130 mm shells or 1.5 torpedoes
   Stability (Unstable if below 1.00): 1.25
   Metacentric height 2.4 ft / 0.7 m
   Roll period: 12.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 89 %
         - Recoil effect (Restricted arc if above 1.00): 0.20
   Seaboat quality  (Average = 1.00): 1.33

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.520 / 0.525
   Length to Beam Ratio: 6.29 : 1
   'Natural speed' for length: 17.18 kts
   Power going to wave formation at top speed: 54 %
   Trim (Max stability = 0, Max steadiness = 100): 67
   Bow angle (Positive = bow angles forward): 15.00 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 %,  18.70 ft / 5.70 m,  13.78 ft / 4.20 m
      - Forward deck:   30.00 %,  13.78 ft / 4.20 m,  13.78 ft / 4.20 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:      14.17 ft / 4.32 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 62.4 %
      - Above water (accommodation/working, high = better): 164.5 %
   Waterplane Area: 9,401 Square feet or 873 Square metres
   Displacement factor (Displacement / loading): 125 %
   Structure weight / hull surface area: 48 lbs/sq ft or 232 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.69
      - Longitudinal: 1.58
      - Overall: 0.75
   Caution: Hull subject to strain in open-sea
   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
   Good seaboat, rides out heavy weather easily

117 D-E

[Kaiser Kirk]

If you have a howitzer or something that serves that role, it would be nice.
Naval guns tend to be flat, high velocity fires.

If you don't...which would be normal, that works.

Overall looks like a tough little ship. Mayans could have used some vs. Foxy's raiding DDs.
Question - the D-E drive basically doubles your actual range, so you're looking at 10,000nm
on a littoral gunboat. Works out to 41 days at cruise speed - more than the likely stores on board.
Does it need that much ?

[The Rock Doctor]

It's a bit high, I agree.  I could knock some range off to give me the margin for an ASW suite.

I've got a new 150mm howitzer, but also have a few gunboats specifically equipped with those.  This I figured is a direct-fire role:  Pillboxes above a beach, hard to spot for ships further out, that sort of thing.

[The Rock Doctor]

Updated with ASW stuff.

Enter ship name, Enter country Enter ship type laid down 1929

Displacement:
   1,817 t light; 1,938 t standard; 2,026 t normal; 2,096 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (303.57 ft / 295.28 ft) x 46.92 ft x (9.84 / 10.10 ft)
   (92.53 m / 90.00 m) x 14.30 m  x (3.00 / 3.08 m)

Armament:
      4 - 5.12" / 130 mm 45.0 cal guns - 67.61lbs / 30.67kg shells, 400 per gun
     Quick firing guns in deck and hoist mounts, 1929 Model
     2 x 2-gun mounts on centreline, evenly spread
      8 - 1.97" / 50.0 mm 60.0 cal guns - 4.18lbs / 1.90kg shells, 1,000 per gun
     Anti-air guns in deck mounts, 1929 Model
     2 x Twin mounts on sides, aft deck forward
     2 x Twin mounts on centreline, evenly spread
      2 raised mounts
      8 - 0.59" / 15.0 mm 90.0 cal guns - 0.12lbs / 0.05kg shells, 4,000 per gun
     Machine guns in deck mounts, 1929 Model
     4 x Twin mounts on sides, evenly spread
      4 raised mounts
      Weight of broadside 305 lbs / 138 kg

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   2.95" / 75 mm   191.93 ft / 58.50 m   11.81 ft / 3.60 m
   Ends:   1.18" / 30 mm   103.31 ft / 31.49 m   11.81 ft / 3.60 m
   Upper:   1.18" / 30 mm   191.93 ft / 58.50 m   7.87 ft / 2.40 m
     Main Belt covers 100 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   2.95" / 75 mm   1.18" / 30 mm      2.95" / 75 mm
   3rd:   0.79" / 20 mm   0.59" / 15 mm            -
   4th:   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 2.95" / 75 mm,  Aft 0.00" / 0 mm

Machinery:
   Diesel Internal combustion generators,
   Electric motors, 2 shafts, 6,970 shp / 5,200 Kw = 20.07 kts
   Range 4,000nm at 10.00 kts
   Bunker at max displacement = 157 tons

Complement:
   150 - 196

Cost:
   £0.489 million / $1.955 million

Distribution of weights at normal displacement:
   Armament: 82 tons, 4.0 %
   Armour: 644 tons, 31.8 %
      - Belts: 422 tons, 20.8 %
      - Armament: 39 tons, 1.9 %
      - Armour Deck: 173 tons, 8.5 %
      - Conning Tower: 10 tons, 0.5 %
   Machinery: 214 tons, 10.6 %
   Hull, fittings & equipment: 584 tons, 28.8 %
   Fuel, ammunition & stores: 209 tons, 10.3 %
   Miscellaneous weights: 294 tons, 14.5 %
      - Hull below water: 132 tons
      - Hull above water: 90 tons
      - On freeboard deck: 32 tons
      - Above deck: 40 tons

Fittings:
-117 t:  D-E machinery (BW)
-15 t:  Enhanced hydrophone package (BW)
-90 t:  Torpedo nets (AW)
-10 t:  ASW munitions (FD)
-8 t:  Fire control (AD)
-10 t:  Extra S/R wireless (AD)
-5 t:  Night-fighting doodads (AD)
-22 + 17 t:  Weight reserve (FD/AD)

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     3,657 lbs / 1,659 Kg = 54.6 x 5.1 " / 130 mm shells or 1.5 torpedoes
   Stability (Unstable if below 1.00): 1.17
   Metacentric height 2.2 ft / 0.7 m
   Roll period: 13.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 100 %
         - Recoil effect (Restricted arc if above 1.00): 0.24
   Seaboat quality  (Average = 1.00): 1.33

Hull form characteristics:
   Hull has a flush deck,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.520 / 0.524
   Length to Beam Ratio: 6.29 : 1
   'Natural speed' for length: 17.18 kts
   Power going to wave formation at top speed: 54 %
   Trim (Max stability = 0, Max steadiness = 100): 75
   Bow angle (Positive = bow angles forward): 15.00 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 %,  18.70 ft / 5.70 m,  13.78 ft / 4.20 m
      - Forward deck:   30.00 %,  13.78 ft / 4.20 m,  13.78 ft / 4.20 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:      14.17 ft / 4.32 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 63.2 %
      - Above water (accommodation/working, high = better): 164.5 %
   Waterplane Area: 9,401 Square feet or 873 Square metres
   Displacement factor (Displacement / loading): 124 %
   Structure weight / hull surface area: 47 lbs/sq ft or 231 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.69
      - Longitudinal: 1.57
      - Overall: 0.75
   Caution: Hull subject to strain in open-sea
   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
   Good seaboat, rides out heavy weather easily

117 D-E