Improved Hero Class Minecruiser

[ledeper]

improved Hero Class, Baltic Confederation      Minecruiser laid down 1914

Displacement:
   5.784 t light; 5.969 t standard; 6.450 t normal; 6.835 t full load

Dimensions: Length overall / water x beam x draught
   501,37 ft / 492,13 ft x 47,57 ft x 19,69 ft (normal load)
   152,82 m / 150,00 m x 14,50 m  x 6,00 m

Armament:
      6 - 6,00" / 152 mm guns (3x2 guns), 108,00lbs / 48,99kg shells, 1914 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, majority forward, 1 raised mount - superfiring
      8 - 1,57" / 40,0 mm guns in single mounts, 1,95lbs / 0,89kg shells, 1914 Model
     Breech loading guns in deck mounts
     on side, all amidships
   Weight of broadside 664 lbs / 301 kg
   Shells per gun, main battery: 150

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   6,00" / 152 mm   319,88 ft / 97,50 m   8,28 ft / 2,52 m
   Ends:   Unarmoured
   Upper:   2,00" / 51 mm   319,88 ft / 97,50 m   8,00 ft / 2,44 m
     Main Belt covers 100 % of normal length
     Main belt does not fully cover magazines and engineering spaces

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1,00" / 25 mm   1,00" / 25 mm      1,00" / 25 mm
   2nd:   0,50" / 13 mm         -               -

   - Armour deck: 1,50" / 38 mm, Conning tower: 6,00" / 152 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 3 shafts, 49.560 shp / 36.972 Kw = 29,50 kts
   Range 4.000nm at 14,00 kts
   Bunker at max displacement = 865 tons

Complement:
   359 - 467

Cost:
   £0,687 million / $2,746 million

Distribution of weights at normal displacement:
   Armament: 83 tons, 1,3 %
   Armour: 1.401 tons, 21,7 %
      - Belts: 871 tons, 13,5 %
      - Torpedo bulkhead: 0 tons, 0,0 %
      - Armament: 56 tons, 0,9 %
      - Armour Deck: 429 tons, 6,6 %
      - Conning Tower: 45 tons, 0,7 %
   Machinery: 1.909 tons, 29,6 %
   Hull, fittings & equipment: 2.141 tons, 33,2 %
   Fuel, ammunition & stores: 666 tons, 10,3 %
   Miscellaneous weights: 250 tons, 3,9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     5.862 lbs / 2.659 Kg = 54,3 x 6,0 " / 152 mm shells or 1,0 torpedoes
   Stability (Unstable if below 1.00): 1,16
   Metacentric height 2,2 ft / 0,7 m
   Roll period: 13,6 seconds
   Steadiness   - As gun platform (Average = 50 %): 56 %
         - Recoil effect (Restricted arc if above 1.00): 0,31
   Seaboat quality  (Average = 1.00): 1,11

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,490
   Length to Beam Ratio: 10,34 : 1
   'Natural speed' for length: 22,18 kts
   Power going to wave formation at top speed: 56 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 20,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      25,39 ft / 7,74 m
      - Forecastle (20 %):   15,52 ft / 4,73 m
      - Mid (50 %):      15,52 ft / 4,73 m
      - Quarterdeck (15 %):   15,52 ft / 4,73 m
      - Stern:      15,52 ft / 4,73 m
      - Average freeboard:   16,31 ft / 4,97 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 110,4 %
      - Above water (accommodation/working, high = better): 127,3 %
   Waterplane Area: 15.456 Square feet or 1.436 Square metres
   Displacement factor (Displacement / loading): 105 %
   Structure weight / hull surface area: 80 lbs/sq ft or 391 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,96
      - Longitudinal: 1,47
      - Overall: 1,00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent

         Room for 100 mines

[miketr]

Impressive ship but the belt doesn't cover the mags fully.  Also the engine year is a question mark, shouldn't it be 1914 hull year and 1912 engine?

Michael

[ledeper]

I`ve tried but I can`t seem to make the belt fit

[Korpen]

I`ve tried but I can`t seem to make the belt fit

On the armour page, just increase the lenght of the belt,  do not bother with pressing defult, but add all numbers by hand.

[The Rock Doctor]

What prompts the adoption of turreted 6"?

[Blooded]

Hello,

Since the twin 6" turrets have so little armor, I would adopt a mount with hoist. It may provide some extra strength. I don't think you need turret and barbette until you get into the 7.5"+ range. Would this be correct?

Do light twin mounts need to be researched? Hopefully I will have 1910 LC architecture researched soon. Also does that mean that DDs can adopt twins(or would that be a later DD tech)?

Thanks for any help.

[The Rock Doctor]

I think once you develop a twin deck mount for a certain gun on a certain ship, it's not a huge leap to doing the same with other guns or different ships.

That said - I reckon we're way ahead of the curve with the 1910 CL tech in that respect.

[Carthaginian]

What prompts the adoption of turreted 6"?

Not the tech, that's for sure... ;)
Guns should be mounts and hoists, Ledeper.
That would free up a bit more weight to use on the armor belt.

Also I noticed this:

- Stem:      25,39 ft / 7,74 m
      - Forecastle (20 %):   15,52 ft / 4,73 m

and this:

      6 - 6,00" / 152 mm guns (3x2 guns), 108,00lbs / 48,99kg shells, 1914 Model
     Breech loading guns in turrets (on barbettes)
     on centreline ends, majority forward, 1 raised mount - superfiring

which taken together would mean that only one of the gun mounts would have head-on fire. The two deck-level turrets couldn't fire over a stem 10' higher than the foredeck.


I like the design premise, but she needs a bit of tweaking before she's ready.

[ledeper]

Improved Hero Class, Baltic Confederation          Minecruiser  laid down 1912

Displacement:
   6.706 t light; 6.916 t standard; 7.716 t normal; 8.356 t full load

Dimensions: Length overall / water x beam x draught
   501,50 ft / 492,13 ft x 47,57 ft x 19,69 ft (normal load)
   152,86 m / 150,00 m x 14,50 m  x 6,00 m

Armament:
      6 - 6,00" / 152 mm guns (3x2 guns), 108,00lbs / 48,99kg shells, 1912 Model
     Breech loading guns in deck mounts with hoists
     on centreline ends, majority forward, 1 raised mount - superfiring
      8 - 1,57" / 40,0 mm guns (2x4 guns), 1,95lbs / 0,89kg shells, 1912 Model
     Quick firing guns in deck mounts
     on side, all amidships
   Weight of broadside 664 lbs / 301 kg
   Shells per gun, main battery: 150

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   6,00" / 152 mm   362,53 ft / 110,50 m   11,55 ft / 3,52 m
   Ends:   Unarmoured
   Upper:   2,00" / 51 mm   319,88 ft / 97,50 m   8,01 ft / 2,44 m
     Main Belt covers 113 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1,00" / 25 mm   1,00" / 25 mm      1,00" / 25 mm
   2nd:   0,50" / 13 mm         -               -

   - Armour deck: 2,00" / 51 mm, Conning tower: 6,00" / 152 mm

Machinery:
   Coal fired boilers, steam turbines,
   Electric motors, 3 shafts, 50.157 shp / 37.417 Kw = 28,50 kts
   Range 4.000nm at 14,00 kts
   Bunker at max displacement = 1.440 tons (100% coal)

Complement:
   411 - 535

Cost:
   £0,612 million / $2,449 million

Distribution of weights at normal displacement:
   Armament: 83 tons, 1,1 %
   Armour: 1.944 tons, 25,2 %
      - Belts: 1.240 tons, 16,1 %
      - Torpedo bulkhead: 0 tons, 0,0 %
      - Armament: 28 tons, 0,4 %
      - Armour Deck: 625 tons, 8,1 %
      - Conning Tower: 50 tons, 0,7 %
   Machinery: 2.200 tons, 28,5 %
   Hull, fittings & equipment: 2.229 tons, 28,9 %
   Fuel, ammunition & stores: 1.010 tons, 13,1 %
   Miscellaneous weights: 250 tons, 3,2 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     7.631 lbs / 3.461 Kg = 70,7 x 6,0 " / 152 mm shells or 1,1 torpedoes
   Stability (Unstable if below 1.00): 1,21
   Metacentric height 2,3 ft / 0,7 m
   Roll period: 13,1 seconds
   Steadiness   - As gun platform (Average = 50 %): 52 %
         - Recoil effect (Restricted arc if above 1.00): 0,28
   Seaboat quality  (Average = 1.00): 1,04

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,586
   Length to Beam Ratio: 10,34 : 1
   'Natural speed' for length: 22,18 kts
   Power going to wave formation at top speed: 57 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 21,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      24,41 ft / 7,44 m
      - Forecastle (20 %):   15,52 ft / 4,73 m
      - Mid (50 %):      15,52 ft / 4,73 m
      - Quarterdeck (15 %):   15,52 ft / 4,73 m
      - Stern:      15,52 ft / 4,73 m
      - Average freeboard:   16,23 ft / 4,95 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 104,7 %
      - Above water (accommodation/working, high = better): 121,5 %
   Waterplane Area: 16.900 Square feet or 1.570 Square metres
   Displacement factor (Displacement / loading): 106 %
   Structure weight / hull surface area: 79 lbs/sq ft or 384 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,97
      - Longitudinal: 1,29
      - Overall: 1,00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent
        1910 CL tech completed!!

[P3D]

The ship is too large for 6x6", and why do you have 6" belt and 2" deck? Planning to fight against armored cruisers?
I guess you have FC, but then the 100t reserved for mines makes minelaying a tertiary role at most. Also, in the Baltic, you might want to limit the draught of the ship.

Note: the CL tech is early because by the time of transition the Swiss were developing it.

[ledeper]

It is more or less the same type as "county"class light cruiser but with 2 6" guns less,and is an attempt to uniform my small cruisers

[Carthaginian]

Guns still wouldn't be able to fire directly forward at low elevation.
You'd have to lower the bow  a fair bit for that- 1.25m more or so.

[Korpen]

Note: the CL tech is early because by the time of transition the Swiss were developing it.

Not really, HMS Flygia hade twin 15cm guns in armoured gunhouses, and she was launched in 1905. So i would not say that it is any wrong with that aspect, at least not for the baltics.

Flygia at sea

[ledeper]

Improved Hero-Class, Baltic Confederation  ligth cruisers laid down 1912

Displacement:
   6.177 t light; 6.402 t standard; 6.947 t normal; 7.383 t full load

Dimensions: Length overall / water x beam x draught
   485,76 ft / 475,72 ft x 49,21 ft x 21,33 ft (normal load)
   148,06 m / 145,00 m x 15,00 m  x 6,50 m

Armament:
      8 - 6,00" / 152 mm guns (4x2 guns), 108,00lbs / 48,99kg shells, 1912 Model
     Breech loading guns in deck mounts with hoists
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      4 - 4,00" / 102 mm guns in single mounts, 32,00lbs / 14,51kg shells, 1912 Model
     Quick firing guns in deck mounts
     on side, all amidships
      4 - 1,57" / 40,0 mm guns in single mounts, 1,95lbs / 0,89kg shells, 1912 Model
     Breech loading guns in deck mounts
     on side, evenly spread
   Weight of broadside 1.000 lbs / 454 kg
   Shells per gun, main battery: 150

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   6,00" / 152 mm   363,35 ft / 110,75 m   8,42 ft / 2,57 m
   Ends:   Unarmoured
   Upper:   2,00" / 51 mm   330,54 ft / 100,75 m   8,00 ft / 2,44 m
     Main Belt covers 118 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1,00" / 25 mm   1,00" / 25 mm            -
   2nd:   0,50" / 13 mm         -               -
   3rd:   0,50" / 13 mm         -               -

   - Armour deck: 2,00" / 51 mm, Conning tower: 6,00" / 152 mm

Machinery:
   Oil fired boilers, steam turbines,
   Electric motors, 3 shafts, 49.548 shp / 36.962 Kw = 29,00 kts
   Range 4.000nm at 14,00 kts
   Bunker at max displacement = 980 tons

Complement:
   379 - 494

Cost:
   £0,598 million / $2,391 million

Distribution of weights at normal displacement:
   Armament: 125 tons, 1,8 %
   Armour: 1.623 tons, 23,4 %
      - Belts: 965 tons, 13,9 %
      - Torpedo bulkhead: 0 tons, 0,0 %
      - Armament: 40 tons, 0,6 %
      - Armour Deck: 570 tons, 8,2 %
      - Conning Tower: 47 tons, 0,7 %
   Machinery: 1.976 tons, 28,4 %
   Hull, fittings & equipment: 2.254 tons, 32,4 %
   Fuel, ammunition & stores: 770 tons, 11,1 %
   Miscellaneous weights: 200 tons, 2,9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     6.253 lbs / 2.836 Kg = 57,9 x 6,0 " / 152 mm shells or 1,1 torpedoes
   Stability (Unstable if below 1.00): 1,17
   Metacentric height 2,3 ft / 0,7 m
   Roll period: 13,6 seconds
   Steadiness   - As gun platform (Average = 50 %): 53 %
         - Recoil effect (Restricted arc if above 1.00): 0,40
   Seaboat quality  (Average = 1.00): 1,05

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,487
   Length to Beam Ratio: 9,67 : 1
   'Natural speed' for length: 21,81 kts
   Power going to wave formation at top speed: 57 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 25,00 degrees
   Stern overhang: 0,00 ft / 0,00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      21,52 ft / 6,56 m
      - Forecastle (20 %):   15,78 ft / 4,81 m
      - Mid (50 %):      15,78 ft / 4,81 m
      - Quarterdeck (15 %):   15,78 ft / 4,81 m
      - Stern:      15,78 ft / 4,81 m
      - Average freeboard:   16,24 ft / 4,95 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 109,5 %
      - Above water (accommodation/working, high = better): 122,3 %
   Waterplane Area: 15.417 Square feet or 1.432 Square metres
   Displacement factor (Displacement / loading): 103 %
   Structure weight / hull surface area: 85 lbs/sq ft or 414 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,95
      - Longitudinal: 1,62
      - Overall: 1,00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is excellent
      shortened by 5 meters and reduced stem by 1 meter

[P3D]

Note: the CL tech is early because by the time of transition the Swiss were developing it.

Not really, HMS Flygia hade twin 15cm guns in armoured gunhouses, and she was launched in 1905. So i would not say that it is any wrong with that aspect, at least not for the baltics.

Korpen, trust me, I remember how I wrote the tech list, and Flygia (or any other early historical example, if any) played no role whatsoever in determining the tech year ;)