Design for me...

[1Big Rich]

Rocky,

Actually, as I originally simmed her, freeboard was 6.5m forward and 4.4 aft, and she had the 'fire in the heaviest weather' advantage (seaboat quality was 1.9).   But  as you specified economy, and with those stats she was close to 6000 tons, I decided she needed to go on a diet.

Still, even with the stepped quarter deck, she was has the Good Seaboat advantage, and that lower freeboard aft only is for 35% of her length.

If you'd like, I'll return her to her original sim state and you can evaluate that version with respect to your concerns.

Regards,

[The Rock Doctor]

I'd be interested in seeing that variant as well....

[1Big Rich]

RockyGCEACR17-orig, Rocky_GC EACR laid down 1916

Displacement:
   5,647 t light; 6,000 t standard; 6,511 t normal; 6,919 t full load

Dimensions: Length overall / water x beam x draught
   387.14 ft / 387.14 ft x 59.06 ft x 16.08 ft (normal load)
   118.00 m / 118.00 m x 18.00 m  x 4.90 m

Armament:
      6 - 9.21" / 234 mm guns (3x2 guns), 390.95lbs / 177.33kg shells, 1916 Model
     Breech loading guns in turrets (on barbettes)
     on centreline, evenly spread
     Main guns limited to end-on fire
     Aft Main mounts separated by engine room
      8 - 3.94" / 100 mm guns in single mounts, 30.51lbs / 13.84kg shells, 1916 Model
     Quick firing guns in casemate mounts
     on side, evenly spread, 4 raised mounts
      2 - 2.56" / 65.0 mm guns in single mounts, 8.38lbs / 3.80kg shells, 1916 Model
     Anti-aircraft guns in deck mounts
     on side, evenly spread, all raised mounts
      4 - 0.31" / 8.0 mm guns in single mounts, 0.02lbs / 0.01kg shells, 1916 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 2,607 lbs / 1,182 kg
   Shells per gun, main battery: 150
   4 - 21.0" / 533.4 mm above water torpedoes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   5.51" / 140 mm   180.45 ft / 55.00 m   16.40 ft / 5.00 m
   Ends:   2.36" / 60 mm   180.45 ft / 55.00 m   9.84 ft / 3.00 m
     26.25 ft / 8.00 m Unarmoured ends
   Upper:   2.95" / 75 mm   180.45 ft / 55.00 m   8.20 ft / 2.50 m
     Main Belt covers 72 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   7.87" / 200 mm   2.95" / 75 mm      7.09" / 180 mm
   2nd:   2.95" / 75 mm         -               -

   - Armour deck: 1.18" / 30 mm

Machinery:
   Coal and oil fired boilers, steam turbines,
   Geared drive, 3 shafts, 8,715 shp / 6,501 Kw = 18.00 kts
   Range 8,000nm at 10.00 kts
   Bunker at max displacement = 919 tons (65% coal)

Complement:
   362 - 471

Cost:
   £0.850 million / $3.401 million

Distribution of weights at normal displacement:
   Armament: 326 tons, 5.0 %
   Armour: 2,112 tons, 32.4 %
      - Belts: 1,135 tons, 17.4 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 605 tons, 9.3 %
      - Armour Deck: 372 tons, 5.7 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 345 tons, 5.3 %
   Hull, fittings & equipment: 2,714 tons, 41.7 %
   Fuel, ammunition & stores: 864 tons, 13.3 %
   Miscellaneous weights: 150 tons, 2.3 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     13,479 lbs / 6,114 Kg = 34.5 x 9.2 " / 234 mm shells or 2.5 torpedoes
   Stability (Unstable if below 1.00): 1.03
   Metacentric height 2.4 ft / 0.7 m
   Roll period: 16.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 100 %
         - Recoil effect (Restricted arc if above 1.00): 1.14
   Seaboat quality  (Average = 1.00): 1.98

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.620
   Length to Beam Ratio: 6.56 : 1
   'Natural speed' for length: 19.68 kts
   Power going to wave formation at top speed: 45 %
   Trim (Max stability = 0, Max steadiness = 100): 56
   Bow angle (Positive = bow angles forward): -15.00 degrees
   Stern overhang: -3.94 ft / -1.20 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      21.33 ft / 6.50 m
      - Forecastle (18 %):   21.33 ft / 6.50 m
      - Mid (65 %):      21.33 ft / 6.50 m (14.44 ft / 4.40 m aft of break)
      - Quarterdeck (12 %):   14.44 ft / 4.40 m
      - Stern:      14.44 ft / 4.40 m
      - Average freeboard:   18.91 ft / 5.77 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 59.2 %
      - Above water (accommodation/working, high = better): 150.3 %
   Waterplane Area: 17,036 Square feet or 1,583 Square metres
   Displacement factor (Displacement / loading): 117 %
   Structure weight / hull surface area: 108 lbs/sq ft or 526 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.91
      - Longitudinal: 2.34
      - 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

150t firecontrol, wireless, etc.

[The Rock Doctor]

Interesting, and I may tinker with it.  There's an issue with recoil that will have to be considered - probably as a result of the higher freeboard.

[Korpen]

It would be powerful, but I have to think deck space would be an issue...

Example :
The GC Jatibonico class is 84m x 8m, featuring 5 guns spots and 2 sets of  torpedo tubes on centerline. Waterline area is 414m sq.

The proposed vessel has 5 gun spots on centerline (albeit longer guns), but no torpedo tubes above deck, is 15m longer and is 14m wider, with  3.9x the waterline area. I'd think the secondary 140mm would fit in that extra 7m to each side.

The overall dimensions are not the critical factor, the amount of citadel is. If you want all the guns and their magazines to be protected by the main belt then 64m and not 99m is the limiting factor. If the guns are L50 they are just short of 10m long. With some workspace behind them in a turret; let's say 13m for the centreline gun and 5m for the end guns in dackspace need, this will give you less then 30m for the superstructure and the secondaries (less then the space needed by the main guns due to blast effects)..

[The Bushranger]

Geez, been awhile since I spooled up SpringSharp...

A private DKB designer sends a package to the Armada with the following deign. With notes:

-Torpedo tube mounted in ram bow for last-ditch convoy defense. Shoot a torpedo to 'sofen up' where you intend to ram.
-Auxilary coal boilers to allow for emergency use of stores taken from older merchies being escorted
-Speed more than adequate for convoy defense.
-Main battery gun arrangement A-Xs-Y
-Secondaries in traditional casemates, with an additional 100mm on each end in a deck mounting with weather shields. Aft deck 100mm raised over 65mm mounts.
-65mm anti-airship guns mounted aft in a trianguar arrangement, two on deck level abeam and ahead of X turret, third mounted ahead of and above X turret. All with splinter shields.

Code Select Expand

Odin, Escort Kreuzer laid down 1917 (Engine 1916)

Displacement:
5,153 t light; 5,504 t standard; 6,031 t normal; 6,453 t full load

Dimensions: Length overall / water x beam x draught
383.86 ft / 377.30 ft x 57.41 ft x 16.24 ft (normal load)
117.00 m / 115.00 m x 17.50 m  x 4.95 m

Armament:
      6 - 9.21" / 234 mm guns (3x2 guns), 390.95lbs / 177.33kg shells, 1917 Model
  Breech loading guns in turrets (on barbettes)
  on centreline ends, majority aft
      6 - 3.94" / 100 mm guns in single mounts, 30.51lbs / 13.84kg shells, 1917 Model
  Quick firing guns in casemate mounts
  on side, evenly spread
      4 - 3.94" / 100 mm guns in single mounts, 30.51lbs / 13.84kg shells, 1917 Model
  Quick firing guns in deck mounts with hoists
  on side ends, evenly spread, 2 raised mounts - superfiring
      3 - 2.56" / 65.0 mm guns in single mounts, 8.38lbs / 3.80kg shells, 1917 Model
  Anti-aircraft guns in deck mounts
  on side, all aft, 1 raised mount
      4 - 0.30" / 7.7 mm guns in single mounts, 0.01lbs / 0.01kg shells, 1917 Model
  Machine guns in deck mounts
  on side ends, evenly spread, all raised mounts - superfiring
Weight of broadside 2,676 lbs / 1,214 kg
Shells per gun, main battery: 150
4 - 21.0" / 533 mm above water torpedoes, 1 - 21.0" / 533 mm submerged torpedo tubes

Armour:
   - Belts: Width (max) Length (avg) Height (avg)
Main: 4.72" / 120 mm 213.25 ft / 65.00 m 13.12 ft / 4.00 m
Ends: 0.79" / 20 mm 164.04 ft / 50.00 m 8.20 ft / 2.50 m
  Main Belt covers 87 % of normal length

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 4.72" / 120 mm 2.56" / 65 mm 3.94" / 100 mm
2nd: 1.97" / 50 mm       -       -
3rd: 0.79" / 20 mm       -       -
4th: 0.39" / 10 mm       -       -

   - Armour deck: 1.97" / 50 mm, Conning tower: 4.72" / 120 mm

Machinery:
Coal and oil fired boilers, steam turbines,
Direct drive, 3 shafts, 15,000 shp / 11,190 Kw = 20.95 kts
Range 10,000nm at 10.00 kts (Bunkerage = 949 tons (25% coal))

Complement:
341 - 444

Cost:
£0.984 million / $3.937 million

Distribution of weights at normal displacement:
Armament: 334 tons, 5.5 %
Armour: 1,573 tons, 26.1 %
   - Belts: 635 tons, 10.5 %
   - Torpedo bulkhead: 0 tons, 0.0 %
   - Armament: 327 tons, 5.4 %
   - Armour Deck: 577 tons, 9.6 %
   - Conning Tower: 34 tons, 0.6 %
Machinery: 572 tons, 9.5 %
Hull, fittings & equipment: 2,424 tons, 40.2 %
Fuel, ammunition & stores: 878 tons, 14.6 %
Miscellaneous weights: 250 tons, 4.1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
  8,829 lbs / 4,005 Kg = 22.6 x 9.2 " / 234 mm shells or 1.7 torpedoes
Stability (Unstable if below 1.00): 1.11
Metacentric height 2.7 ft / 0.8 m
Roll period: 14.8 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.82
Seaboat quality  (Average = 1.00): 1.32

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.600
Length to Beam Ratio: 6.57 : 1
'Natural speed' for length: 19.42 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 54
Bow angle (Positive = bow angles forward): -5.00 degrees
Stern overhang: 6.56 ft / 2.00 m
Freeboard (% = measuring location as a percentage of overall length):
   - Stem: 22.97 ft / 7.00 m
   - Forecastle (5 %): 19.69 ft / 6.00 m
   - Mid (50 %): 19.69 ft / 6.00 m (12.30 ft / 3.75 m aft of break)
   - Quarterdeck (15 %): 12.30 ft / 3.75 m
   - Stern: 12.30 ft / 3.75 m
   - Average freeboard: 16.06 ft / 4.90 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 80.2 %
- Above water (accommodation/working, high = better): 127.1 %
Waterplane Area: 15,843 Square feet or 1,472 Square metres
Displacement factor (Displacement / loading): 107 %
Structure weight / hull surface area: 106 lbs/sq ft or 516 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 2.12
- 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
Good seaboat, rides out heavy weather easily