Logi's Design Studies

[Jefgte]

Not a bad BC...

Could I suggest to remove 1x 15" gun & increase the speed (& the lenght).

26.5kts is short.

A kind of pocket Renown
3T2x15" - 27.5kts


Jef  ;)

[Logi]

Something like this? Although I don't like the idea. Having one extra barrel should greatly improve the accuracy of fire against a 6-gun. It is halfway between 8 barrels and 6 barrels after all.

Minimalist Concept Study,  Light Battlecruiser laid down 1925

Displacement:
   18,000 t light; 19,060 t standard; 20,580 t normal; 21,796 t full load

Dimensions: Length overall / water x beam x draught
   550.00 ft / 550.00 ft x 94.00 ft x 25.80 ft (normal load)
   167.64 m / 167.64 m x 28.65 m  x 7.86 m

Armament:
      6 - 15.00" / 381 mm guns (3x2 guns), 1,687.50lbs / 765.44kg shells, 1925 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, majority forward
      20 - 5.00" / 127 mm guns (10x2 guns), 62.50lbs / 28.35kg shells, 1925 Model
     Quick firing guns in deck mounts with hoists
     on side, all amidships, 4 raised mounts - superfiring
      2 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1925 Model
     Anti-aircraft guns in deck mounts
     on centreline, all amidships
   Weight of broadside 11,402 lbs / 5,172 kg
   Shells per gun, main battery: 100

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   5.00" / 127 mm   358.00 ft / 109.12 m   17.03 ft / 5.19 m
   Ends:   Unarmoured
     Main Belt covers 100 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   11.3" / 286 mm   4.00" / 102 mm      7.50" / 191 mm
   2nd:   2.00" / 51 mm   1.00" / 25 mm      2.00" / 51 mm
   3rd:   0.25" / 6 mm   0.25" / 6 mm            -

   - Armour deck: 2.15" / 55 mm, Conning tower: 3.00" / 76 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 87,654 shp / 65,390 Kw = 28.00 kts
   Range 12,000nm at 12.00 kts
   Bunker at max displacement = 2,737 tons

Complement:
   858 - 1,116

Cost:
   £7.284 million / $29.136 million

Distribution of weights at normal displacement:
   Armament: 1,425 tons, 6.9 %
   Armour: 4,222 tons, 20.5 %
      - Belts: 1,340 tons, 6.5 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 1,411 tons, 6.9 %
      - Armour Deck: 1,422 tons, 6.9 %
      - Conning Tower: 49 tons, 0.2 %
   Machinery: 2,846 tons, 13.8 %
   Hull, fittings & equipment: 9,157 tons, 44.5 %
   Fuel, ammunition & stores: 2,580 tons, 12.5 %
   Miscellaneous weights: 350 tons, 1.7 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     23,945 lbs / 10,861 Kg = 14.2 x 15.0 " / 381 mm shells or 2.5 torpedoes
   Stability (Unstable if below 1.00): 1.16
   Metacentric height 6.0 ft / 1.8 m
   Roll period: 16.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.63
   Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.540
   Length to Beam Ratio: 5.85 : 1
   'Natural speed' for length: 23.45 kts
   Power going to wave formation at top speed: 60 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      24.00 ft / 7.32 m
      - Forecastle (20 %):   23.00 ft / 7.01 m
      - Mid (50 %):      23.00 ft / 7.01 m
      - Quarterdeck (15 %):   23.00 ft / 7.01 m
      - Stern:      23.00 ft / 7.01 m
      - Average freeboard:   23.08 ft / 7.03 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 98.6 %
      - Above water (accommodation/working, high = better): 182.5 %
   Waterplane Area: 35,745 Square feet or 3,321 Square metres
   Displacement factor (Displacement / loading): 95 %
   Structure weight / hull surface area: 181 lbs/sq ft or 885 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.90
      - Longitudinal: 2.34
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent

Deck covers only armored box (358 ft), thus real armor is 3.5" (89mm) over the 358 ft of the protected box.

Main Belt sloped 20 degrees, true vertical height is 16 ft.

Misc Weight (350 t):
250t FCS
25t Radar
25t Long Range Wireless
50t Construction Reserve

[Jefgte]

...Having one extra barrel should greatly improve the accuracy of fire against a 6-gun. It is halfway between 8 barrels and 6 barrels after all.

...just by 16% I think

The punch of the 15" shells is a real superiority vs 16000t - 20000t BCs & all ACs.
  ??? 28 kts... will they be enough for 1925 ?

Jef

[Logi]

Huh 28 kts... will they be enough for 1925 ?

I can adjust to 1922, but that will cost 0.5"-1" off the main belt.

I tried going for the extra knot, but either it has paper armor everywhere (as opposed to only the belt now) or there's a 2k tonnage jump.

[Delta Force]

Seems to be for nations that are money rich but IP poor. The cost of the ship is actually very close to the 35,000 ton fast battleships I have been looking at.

It's a tad too fragile I think, especially seeing as its speed isn't much higher than what can be done with fast battleships. What would this ship look like if you dropped it down to 21 or 23 knots and took the weight savings and added it to armor? I think you could get some good armor on the ship.

I would also give consideration to increasing the size of the ship to the mid 20s to enable a design with more capabilities, either armor or speed.

[Logi]

The cost of the ship is actually very close to the 35,000 ton fast battleships I have been looking at.

Cost in N-Verse is calculated via tonnage. We don't use the cost SS generates.

It's a tad too fragile I think, especially seeing as its speed isn't much higher than what can be done with fast battleships.

Extra speed costs 2kton per kt. Naturally it will not be a great deal faster than a fast battleship, that would require a 20+ kton ship. Also the point was to reduce armor since armor below 11" sloped is quite pointless against BB level shells.

I would also give consideration to increasing the size of the ship to the mid 20s to enable a design with more capabilities, either armor or speed.

No. Once you go into the 20s the ship should have a TDS, else it is a liability. Once you add a TDS, it quickly jumps near the 30 kton range. Increasing weight to above 20 kton, therefore, is unacceptable.


Up-armor version

Minimalist Concept Study,  Pocket Battleship laid down 1923

Displacement:
   18,000 t light; 19,060 t standard; 20,610 t normal; 21,850 t full load

Dimensions: Length overall / water x beam x draught
   530.00 ft / 530.00 ft x 94.00 ft x 26.00 ft (normal load)
   161.54 m / 161.54 m x 28.65 m  x 7.92 m

Armament:
     6 - 15.00" / 381 mm guns (3x2 guns), 1,687.50lbs / 765.44kg shells, 1923 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, majority forward
     20 - 5.00" / 127 mm guns (10x2 guns), 62.50lbs / 28.35kg shells, 1923 Model
     Quick firing guns in deck mounts with hoists
     on side, all amidships, 4 raised mounts - superfiring
     2 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1923 Model
     Anti-aircraft guns in deck mounts
     on centreline, all amidships
   Weight of broadside 11,402 lbs / 5,172 kg
   Shells per gun, main battery: 100

Armour:
  - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   13.0" / 330 mm   358.00 ft / 109.12 m   17.03 ft / 5.19 m
   Ends:   Unarmoured
     Main Belt covers 104 % of normal length

  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   14.2" / 361 mm   5.00" / 127 mm      10.0" / 254 mm
   2nd:   2.00" / 51 mm   1.00" / 25 mm      2.00" / 51 mm
   3rd:   0.25" / 6 mm   0.25" / 6 mm            -

  - Armour deck: 2.60" / 66 mm, Conning tower: 3.00" / 76 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 48,294 shp / 36,027 Kw = 24.00 kts
   Range 12,000nm at 12.00 kts
   Bunker at max displacement = 2,790 tons

Complement:
   859 - 1,118

Cost:
   £5.973 million / $23.892 million

Distribution of weights at normal displacement:
   Armament: 1,425 tons, 6.9 %
   Armour: 6,675 tons, 32.4 %
      - Belts: 3,471 tons, 16.8 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 1,471 tons, 7.1 %
      - Armour Deck: 1,686 tons, 8.2 %
      - Conning Tower: 49 tons, 0.2 %
   Machinery: 1,614 tons, 7.8 %
   Hull, fittings & equipment: 7,960 tons, 38.6 %
   Fuel, ammunition & stores: 2,610 tons, 12.7 %
   Miscellaneous weights: 325 tons, 1.6 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     25,255 lbs / 11,455 Kg = 15.0 x 15.0 " / 381 mm shells or 3.1 torpedoes
   Stability (Unstable if below 1.00): 1.21
   Metacentric height 6.4 ft / 2.0 m
   Roll period: 15.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.42
   Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.557
   Length to Beam Ratio: 5.64 : 1
   'Natural speed' for length: 23.02 kts
   Power going to wave formation at top speed: 54 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      18.00 ft / 5.49 m
      - Forecastle (20 %):   16.00 ft / 4.88 m
      - Mid (50 %):      16.00 ft / 4.88 m
      - Quarterdeck (15 %):   16.00 ft / 4.88 m
      - Stern:      16.00 ft / 4.88 m
      - Average freeboard:   16.16 ft / 4.93 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 79.2 %
      - Above water (accommodation/working, high = better): 124.2 %
   Waterplane Area: 34,994 Square feet or 3,251 Square metres
   Displacement factor (Displacement / loading): 95 %
   Structure weight / hull surface area: 173 lbs/sq ft or 843 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.94
      - Longitudinal: 1.69
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is excellent

Deck covers only armored box (358 ft), thus real armor is 4" (102mm) over the 358 ft of the protected box.

Main Belt sloped 20 degrees, true vertical height is 16 ft.

Misc Weight (325 t):
250t FCS
25t Radar
25t Long Range Wireless
25t Construction Reserve

I prefer up-firepower over up-armor, but that's my quirk.

Minimalist Concept Study,  Light Battlecruiser laid down 1923

Displacement:
   18,000 t light; 19,251 t standard; 20,814 t normal; 22,064 t full load

Dimensions: Length overall / water x beam x draught
   550.00 ft / 550.00 ft x 94.00 ft x 25.80 ft (normal load)
   167.64 m / 167.64 m x 28.65 m  x 7.86 m

Armament:
     8 - 15.00" / 381 mm guns (4x2 guns), 1,687.50lbs / 765.44kg shells, 1923 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread, 1 raised mount - superfiring
     20 - 5.00" / 127 mm guns (10x2 guns), 62.50lbs / 28.35kg shells, 1923 Model
     Quick firing guns in deck mounts with hoists
     on side, all amidships, 4 raised mounts - superfiring
     2 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1923 Model
     Anti-aircraft guns in deck mounts
     on centreline, all amidships
   Weight of broadside 14,777 lbs / 6,703 kg
   Shells per gun, main battery: 100

Armour:
  - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   5.00" / 127 mm   358.00 ft / 109.12 m   17.03 ft / 5.19 m
   Ends:   Unarmoured
     Main Belt covers 100 % of normal length

  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   14.4" / 366 mm   5.00" / 127 mm      7.50" / 191 mm
   2nd:   2.00" / 51 mm   1.00" / 25 mm      2.00" / 51 mm
   3rd:   0.25" / 6 mm   0.25" / 6 mm            -

  - Armour deck: 2.60" / 66 mm, Conning tower: 3.00" / 76 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 47,486 shp / 35,425 Kw = 24.00 kts
   Range 12,000nm at 12.00 kts
   Bunker at max displacement = 2,813 tons

Complement:
   866 - 1,126

Cost:
   £6.993 million / $27.971 million

Distribution of weights at normal displacement:
   Armament: 1,847 tons, 8.9 %
   Armour: 4,909 tons, 23.6 %
      - Belts: 1,341 tons, 6.4 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 1,787 tons, 8.6 %
      - Armour Deck: 1,732 tons, 8.3 %
      - Conning Tower: 49 tons, 0.2 %
   Machinery: 1,587 tons, 7.6 %
   Hull, fittings & equipment: 9,307 tons, 44.7 %
   Fuel, ammunition & stores: 2,814 tons, 13.5 %
   Miscellaneous weights: 350 tons, 1.7 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     21,666 lbs / 9,828 Kg = 12.8 x 15.0 " / 381 mm shells or 2.6 torpedoes
   Stability (Unstable if below 1.00): 1.12
   Metacentric height 5.6 ft / 1.7 m
   Roll period: 16.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 51 %
         - Recoil effect (Restricted arc if above 1.00): 0.67
   Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.546
   Length to Beam Ratio: 5.85 : 1
   'Natural speed' for length: 23.45 kts
   Power going to wave formation at top speed: 52 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      17.00 ft / 5.18 m
      - Forecastle (20 %):   17.00 ft / 5.18 m
      - Mid (50 %):      17.00 ft / 5.18 m
      - Quarterdeck (15 %):   17.00 ft / 5.18 m
      - Stern:      17.00 ft / 5.18 m
      - Average freeboard:   17.00 ft / 5.18 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 92.9 %
      - Above water (accommodation/working, high = better): 134.4 %
   Waterplane Area: 35,951 Square feet or 3,340 Square metres
   Displacement factor (Displacement / loading): 90 %
   Structure weight / hull surface area: 195 lbs/sq ft or 951 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.94
      - Longitudinal: 1.67
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent

Deck covers only armored box (358 ft), thus real armor is 4" (102mm) over the 358 ft of the protected box.

Main Belt sloped 20 degrees, true vertical height is 16 ft.

Misc Weight (350 t):
250t FCS
25t Radar
25t Long Range Wireless
50t Construction Reserve

[Jefgte]

The last one is realy a PBB.
I like  ;)

The second is a kind of slow Courageous & need 28kts mini. 32kts is top.
3T2x15"- 28kts.

Finaly, that is your projects & your choices...


Jef  ;)

[Logi]

The second is a kind of slow Courageous & need 28kts mini. 32kts is top.

Comparison isn't very valid. The Courageous only had 4 x 15", this has a full battleship armament, 8 x 15". I think ships would be a lot wary of 8x15" than 4x15".


If I set 30 kts as the goal, this is what I could come up with. Granted this is a huge liability as it has no TDS. It's also a bit too large for it's armor.

Minimalist Concept Study,  Light Battlecruiser laid down 1923

Displacement:
   24,000 t light; 25,381 t standard; 27,251 t normal; 28,747 t full load

Dimensions: Length overall / water x beam x draught
   660.00 ft / 660.00 ft x 94.00 ft x 28.50 ft (normal load)
   201.17 m / 201.17 m x 28.65 m  x 8.69 m

Armament:
     8 - 15.00" / 381 mm guns (4x2 guns), 1,687.50lbs / 765.44kg shells, 1923 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread, 1 raised mount - superfiring
     20 - 5.00" / 127 mm guns (10x2 guns), 62.50lbs / 28.35kg shells, 1923 Model
     Quick firing guns in deck mounts with hoists
     on side, all amidships, 4 raised mounts - superfiring
     2 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1923 Model
     Anti-aircraft guns in deck mounts
     on centreline, all amidships
   Weight of broadside 14,777 lbs / 6,703 kg
   Shells per gun, main battery: 100

Armour:
  - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   4.50" / 114 mm   435.00 ft / 132.59 m   17.03 ft / 5.19 m
   Ends:   Unarmoured
     Main Belt covers 101 % of normal length

  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   14.0" / 356 mm   5.00" / 127 mm      8.00" / 203 mm
   2nd:   2.00" / 51 mm   1.00" / 25 mm      2.00" / 51 mm
   3rd:   0.25" / 6 mm   0.25" / 6 mm            -

  - Armour deck: 2.64" / 67 mm, Conning tower: 3.20" / 81 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 123,809 shp / 92,362 Kw = 30.00 kts
   Range 12,000nm at 12.00 kts
   Bunker at max displacement = 3,367 tons

Complement:
   1,059 - 1,378

Cost:
   £8.643 million / $34.571 million

Distribution of weights at normal displacement:
   Armament: 1,847 tons, 6.8 %
   Armour: 5,735 tons, 21.0 %
      - Belts: 1,434 tons, 5.3 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 2,148 tons, 7.9 %
      - Armour Deck: 2,091 tons, 7.7 %
      - Conning Tower: 62 tons, 0.2 %
   Machinery: 4,138 tons, 15.2 %
   Hull, fittings & equipment: 11,930 tons, 43.8 %
   Fuel, ammunition & stores: 3,251 tons, 11.9 %
   Miscellaneous weights: 350 tons, 1.3 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     27,881 lbs / 12,647 Kg = 16.5 x 15.0 " / 381 mm shells or 2.6 torpedoes
   Stability (Unstable if below 1.00): 1.09
   Metacentric height 5.4 ft / 1.6 m
   Roll period: 17.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.84
   Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.539
   Length to Beam Ratio: 7.02 : 1
   'Natural speed' for length: 25.69 kts
   Power going to wave formation at top speed: 57 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      25.00 ft / 7.62 m
      - Forecastle (20 %):   23.00 ft / 7.01 m
      - Mid (50 %):      23.00 ft / 7.01 m
      - Quarterdeck (15 %):   22.00 ft / 6.71 m
      - Stern:      22.00 ft / 6.71 m
      - Average freeboard:   22.84 ft / 6.96 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 101.4 %
      - Above water (accommodation/working, high = better): 175.3 %
   Waterplane Area: 42,871 Square feet or 3,983 Square metres
   Displacement factor (Displacement / loading): 94 %
   Structure weight / hull surface area: 193 lbs/sq ft or 942 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.94
      - Longitudinal: 1.68
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent

Deck covers only armored box (435 ft), thus real armor is 4" (102mm) over the 435 ft of the protected box.

Main Belt sloped 20 degrees, true vertical height is 16 ft.

Misc Weight (350 t):
250t FCS
25t Radar
25t Long Range Wireless
50t Construction Reserve

[ctwaterman]

Comparison isn't very valid. The Courageous only had 4 x 15", this has a full battleship armament, 8 x 15". I think ships would be a lot wary of 8x15" than 4x15".

What it comes down to is the compromise between Speed, Firepower, and Protection.  You have maximized speed and fire power.  Your belt armor is well it will keep out Destroyer and cruiser shells but nothing else.   Its all a matter of personal choice!  But as I said before Admiral Fisher would be proud.

The question is if you are trading Battle Ship caliber shells with another ship your ships vitals have literally no Imune Zone.   Even 8" and larger shells can penetrate your belt at typical battle ranges and this means if you exchange several volleys with a slower capital ship and decide you need to run well hope the damage you took wasnt to an Engine or Fire Room otherwise you might not make it.

Basically its a nice ship but your betting on being able to build more of them then the enemy does.  Because it cant stand and fight any of its predecessors let alone any of it contemporaires.

[Logi]

Do you know why I opted for such low armor and maximum firepower? Because it is impossible to fit high speed and decent armor on the hull. The choice was either drop into 6-gun, which I find laughable, or drop armor to 8". 8" as useless as 5".

The question is if you are trading Battle Ship caliber shells with another ship your ships vitals have literally no Imune Zone.

Quite wrong. That is only if we talk about the Belt. A 4" thick deck at waterline (not the 30 kt one because that's just a smidget above waterline) means practically nothing will get in.

If the engine room and fire room is underwater, how is it very vulnerable?

And that is why this statement is wrong as well:

Because it cant stand and fight any of its predecessors let alone any of it contemporaires.

[Logi]

But everyone wants more armor. Again bad protection vs torpedo hits (I tested a 1.5" TDS, would have cost dropping the armor or weight increase of ~2 kton for not all that much survivability against a torpedo).

Main belt and upper-belt reflects a constantly sloping belt that tapers from 5" at the top to 13" at the bottom. All sloped at 20 degrees. Belt is 8ft underwater, 8ft above water. Deck is placed at waterline.

Minimalist Concept Study,  Light Battlecruiser laid down 1923

Displacement:
   26,000 t light; 27,423 t standard; 29,377 t normal; 30,940 t full load

Dimensions: Length overall / water x beam x draught
   650.00 ft / 650.00 ft x 100.00 ft x 29.00 ft (normal load)
   198.12 m / 198.12 m x 30.48 m  x 8.84 m

Armament:
      8 - 15.00" / 381 mm guns (4x2 guns), 1,687.50lbs / 765.44kg shells, 1923 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, evenly spread, 1 raised mount - superfiring
      20 - 5.00" / 127 mm guns (10x2 guns), 62.50lbs / 28.35kg shells, 1923 Model
     Quick firing guns in deck mounts with hoists
     on side, all amidships, 4 raised mounts - superfiring
      2 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1923 Model
     Anti-aircraft guns in deck mounts
     on centreline, all amidships
   Weight of broadside 14,777 lbs / 6,703 kg
   Shells per gun, main battery: 100

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   5.00" / 127 mm   422.00 ft / 128.63 m   8.52 ft / 2.60 m
   Ends:   Unarmoured
   Upper:   13.0" / 330 mm   422.00 ft / 128.63 m   8.52 ft / 2.60 m
     Main Belt covers 100 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   16.0" / 406 mm   6.00" / 152 mm      10.0" / 254 mm
   2nd:   2.00" / 51 mm   1.00" / 25 mm      2.00" / 51 mm
   3rd:   0.25" / 6 mm   0.25" / 6 mm            -

   - Armour deck: 2.60" / 66 mm, Conning tower: 3.00" / 76 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 115,497 shp / 86,161 Kw = 29.00 kts
   Range 12,000nm at 12.00 kts
   Bunker at max displacement = 3,517 tons

Complement:
   1,121 - 1,458

Cost:
   £8.733 million / $34.933 million

Distribution of weights at normal displacement:
   Armament: 1,847 tons, 6.3 %
   Armour: 7,625 tons, 26.0 %
      - Belts: 2,815 tons, 9.6 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 2,578 tons, 8.8 %
      - Armour Deck: 2,170 tons, 7.4 %
      - Conning Tower: 62 tons, 0.2 %
   Machinery: 3,860 tons, 13.1 %
   Hull, fittings & equipment: 12,286 tons, 41.8 %
   Fuel, ammunition & stores: 3,377 tons, 11.5 %
   Miscellaneous weights: 382 tons, 1.3 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     33,041 lbs / 14,987 Kg = 19.6 x 15.0 " / 381 mm shells or 3.1 torpedoes
   Stability (Unstable if below 1.00): 1.09
   Metacentric height 5.9 ft / 1.8 m
   Roll period: 17.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.66
   Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.545
   Length to Beam Ratio: 6.50 : 1
   'Natural speed' for length: 25.50 kts
   Power going to wave formation at top speed: 56 %
   Trim (Max stability = 0, Max steadiness = 100): 49
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      25.00 ft / 7.62 m
      - Forecastle (20 %):   23.00 ft / 7.01 m
      - Mid (50 %):      22.00 ft / 6.71 m
      - Quarterdeck (15 %):   22.00 ft / 6.71 m
      - Stern:      22.00 ft / 6.71 m
      - Average freeboard:   22.51 ft / 6.86 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 91.3 %
      - Above water (accommodation/working, high = better): 170.6 %
   Waterplane Area: 45,170 Square feet or 4,196 Square metres
   Displacement factor (Displacement / loading): 96 %
   Structure weight / hull surface area: 194 lbs/sq ft or 947 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.94
      - Longitudinal: 1.69
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent

Deck covers only armored box (422 ft), thus real armor is 4" (102mm) over the 422 ft of the protected box.

Main Belt sloped 20 degrees, true vertical height is 16 ft. Tapers from 13" at the top to 5" at the bottom.

Misc Weight (382 t):
250t FCS
25t Radar
25t Long Range Wireless
82t Construction Reserve

[Logi]

I think this works better, although it's still a bit big for my taste.

Minimalist Concept Study,  Light Battlecruiser laid down 1925

Displacement:
   23,000 t light; 24,499 t standard; 26,259 t normal; 27,667 t full load

Dimensions: Length overall / water x beam x draught
   580.00 ft / 580.00 ft x 96.00 ft x 30.00 ft (normal load)
   176.78 m / 176.78 m x 29.26 m  x 9.14 m

Armament:
      8 - 15.00" / 381 mm guns (3 mounts), 2,000.00lbs / 907.18kg shells, 1925 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, majority forward
      20 - 5.00" / 127 mm guns (10x2 guns), 62.50lbs / 28.35kg shells, 1925 Model
     Quick firing guns in deck mounts with hoists
     on side, all amidships, 4 raised mounts - superfiring
      2 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1925 Model
     Anti-aircraft guns in deck mounts
     on centreline, all amidships
   Weight of broadside 17,277 lbs / 7,837 kg
   Shells per gun, main battery: 100

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   7.00" / 178 mm   376.00 ft / 114.60 m   17.03 ft / 5.19 m
   Ends:   Unarmoured
     Main Belt covers 100 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   13.8" / 351 mm   5.00" / 127 mm      9.00" / 229 mm
   2nd:   2.00" / 51 mm   1.00" / 25 mm      2.00" / 51 mm
   3rd:   0.25" / 6 mm   0.25" / 6 mm            -

   - Armour deck: 2.59" / 66 mm, Conning tower: 3.00" / 76 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 99,166 shp / 73,978 Kw = 28.00 kts
   Range 12,000nm at 12.00 kts
   Bunker at max displacement = 3,167 tons

Complement:
   1,030 - 1,340

Cost:
   £9.188 million / $36.751 million

Distribution of weights at normal displacement:
   Armament: 1,847 tons, 7.0 %
   Armour: 6,111 tons, 23.3 %
      - Belts: 1,968 tons, 7.5 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 2,222 tons, 8.5 %
      - Armour Deck: 1,864 tons, 7.1 %
      - Conning Tower: 57 tons, 0.2 %
   Machinery: 3,220 tons, 12.3 %
   Hull, fittings & equipment: 11,472 tons, 43.7 %
   Fuel, ammunition & stores: 3,259 tons, 12.4 %
   Miscellaneous weights: 350 tons, 1.3 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     28,659 lbs / 13,000 Kg = 17.0 x 15.0 " / 381 mm shells or 2.8 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 5.7 ft / 1.7 m
   Roll period: 16.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.87
   Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.550
   Length to Beam Ratio: 6.04 : 1
   'Natural speed' for length: 24.08 kts
   Power going to wave formation at top speed: 59 %
   Trim (Max stability = 0, Max steadiness = 100): 49
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      24.00 ft / 7.32 m
      - Forecastle (20 %):   23.00 ft / 7.01 m
      - Mid (50 %):      23.00 ft / 7.01 m
      - Quarterdeck (15 %):   23.00 ft / 7.01 m
      - Stern:      23.00 ft / 7.01 m
      - Average freeboard:   23.08 ft / 7.03 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 94.5 %
      - Above water (accommodation/working, high = better): 165.3 %
   Waterplane Area: 38,866 Square feet or 3,611 Square metres
   Displacement factor (Displacement / loading): 95 %
   Structure weight / hull surface area: 204 lbs/sq ft or 997 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.90
      - Longitudinal: 2.40
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent

Deck covers only armored box (376 ft), thus real armor is 4" (102mm) over the 376 ft of the protected box. Deck is at waterline level and all machinery, storage, etc. is under the waterline.

Main belt sloped 20 degrees. Actual belt height is 16 ft. Main belt tapers from 5" at the top to 9" underwater.

Misc Weight (350 t):
250t FCS
25t Radar
25t Long Range Wireless
50t Construction Reserve

[eltf177]

I noticed that, while most of the Minimalist BC's are 1923 some are 1925. Is this deliberate?

[ctwaterman]

I believe that is when the RRC would have had the tech to start building them.

[Jefgte]

If you want to engage ACs, BCs & always a minimalist BC,
Instal your T2x14" super heavy


Jef