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Good points, especially #2 (- Recoil effect (Restricted arc if above 1.00): 0,92). This is an easy stat to overlook as we as springsharp users tend to look at stability, seakeeping and hull strength. My guess is that your length to beam ratio is right at 11:1, which makes it a VERY narrow hull, is the cause. You may have to add more beam and/or cut weight, preferably to bring that length to beam ratio down closer to 10:1.

Good point Wes. I'd also suggest considering increasing the draft of the design, but all those numbers need to balance out, perhaps by trial and error.

Nemea Class, Kingdom of Greece Destroyer laid down 1949

Displacement:

2.064 t light; 2.186 t standard; 2.438 t normal; 2.640 t full load

Dimensions: Length overall / water x beam x draught

351,05 ft / 347,77 ft x 32,48 ft x 16,08 ft (normal load)

107,00 m / 106,00 m x 9,90 m x 4,90 m

Armament:

8 - 4,72" / 120 mm guns (4x2 guns), 52,72lbs / 23,91kg shells, 1949 Model

Automatic rapid fire guns in deck mounts with hoists

on centreline ends, evenly spread

4 - 1,57" / 40,0 mm guns in single mounts, 1,95lbs / 0,88kg shells, 1949 Model

Anti-aircraft guns in deck mounts

on side, all amidships

12 - 0,79" / 20,0 mm guns (6x2 guns), 0,24lbs / 0,11kg shells, 1949 Model

Anti-aircraft guns in deck mounts

on side, evenly spread

Weight of broadside 432 lbs / 196 kg

Shells per gun, main battery: 300

6 - 23,0" / 584,2 mm above water torpedoes

Armour:

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)

Main: 1,18" / 30 mm 0,04" / 1 mm 0,39" / 10 mm

2nd: 0,59" / 15 mm - -

3rd: 0,39" / 10 mm - -

Machinery:

Oil fired boilers, steam turbines,

Geared drive, 2 shafts, 54.063 shp / 40.331 Kw = 33,50 kts

Range 4.500nm at 16,00 kts

Bunker at max displacement = 454 tons

Complement:

173 - 225

Cost:

£2,163 million / $8,652 million

Distribution of weights at normal displacement:

Armament: 65 tons, 2,6 %

Armour: 12 tons, 0,5 %

- Belts: 0 tons, 0,0 %

- Torpedo bulkhead: 0 tons, 0,0 %

- Armament: 12 tons, 0,5 %

- Armour Deck: 0 tons, 0,0 %

- Conning Tower: 0 tons, 0,0 %

Machinery: 1.120 tons, 45,9 %

Hull, fittings & equipment: 711 tons, 29,2 %

Fuel, ammunition & stores: 375 tons, 15,4 %

Miscellaneous weights: 157 tons, 6,4 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship):

626 lbs / 284 Kg = 11,9 x 4,7 " / 120 mm shells or 0,3 torpedoes

Stability (Unstable if below 1.00): 1,16

Metacentric height 1,2 ft / 0,4 m

Roll period: 12,4 seconds

Steadiness - As gun platform (Average = 50 %): 50 %

- Recoil effect (Restricted arc if above 1.00): 0,85

Seaboat quality (Average = 1.00): 1,11

Hull form characteristics:

Hull has rise forward of midbreak

Block coefficient: 0,470

Length to Beam Ratio: 10,71 : 1

'Natural speed' for length: 18,65 kts

Power going to wave formation at top speed: 69 %

Trim (Max stability = 0, Max steadiness = 100): 45

Bow angle (Positive = bow angles forward): 0,00 degrees

Stern overhang: 3,28 ft / 1,00 m

Freeboard (% = measuring location as a percentage of overall length):

- Stem: 21,33 ft / 6,50 m

- Forecastle (20 %): 19,69 ft / 6,00 m

- Mid (50 %): 19,69 ft / 6,00 m (16,40 ft / 5,00 m aft of break)

- Quarterdeck (15 %): 13,12 ft / 4,00 m

- Stern: 13,12 ft / 4,00 m

- Average freeboard: 17,11 ft / 5,22 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 176,7 %

- Above water (accommodation/working, high = better): 77,1 %

Waterplane Area: 7.328 Square feet or 681 Square metres

Displacement factor (Displacement / loading): 74 %

Structure weight / hull surface area: 39 lbs/sq ft or 190 Kg/sq metre

Hull strength (Relative):

- Cross-sectional: 0,50

- Longitudinal: 3,44

- Overall: 0,61

Hull space for machinery, storage, compartmentation is cramped

Room for accommodation and workspaces is cramped

Electronics (45 tons)

HVAC (12 tons)

LRASM Modele 1947 2x4 32cm launchers and reloads (15 tons)

Crew confort (85 tons)

Electronics:

DRBV-9 surface and air search radar (1 radar, 7.5 tons)

DRBI-3 sentry radar (1 radar, 7.5 tons)

DRBN-1 navigational surface and air search radar (1 radar, 2 tons)

DRBC-4 (DRBC-3B is ascceptable) fire-control radar (2 radars, 8 tons)

ARBR-1 radar jammer/detector (2 units, 2 tons)

SAGEM HF/DF (3 tons)

The closest Russian equivalent of this design, at least in terms of size, is the 1944-dated

Springsharp doesn't necessarily measure these things, but given the specs, I'm going to guess that topweight is probably a major issue, as well as deck space.

I reduce the guns

Nemea Class, Kingdom of Greece Destroyer laid down 1949

Displacement:

2.082 t light; 2.186 t standard; 2.438 t normal; 2.640 t full load

Dimensions: Length overall / water x beam x draught

351,05 ft / 347,77 ft x 32,48 ft x 16,08 ft (normal load)

107,00 m / 106,00 m x 9,90 m x 4,90 m

Armament:

6 - 4,72" / 120 mm guns (3x2 guns), 52,72lbs / 23,91kg shells, 1949 Model

Automatic rapid fire guns in deck mounts with hoists

on centreline ends, majority forward

4 - 1,57" / 40,0 mm guns in single mounts, 1,95lbs / 0,88kg shells, 1949 Model

Anti-aircraft guns in deck mounts

on side, all amidships

12 - 0,79" / 20,0 mm guns (6x2 guns), 0,24lbs / 0,11kg shells, 1949 Model

Anti-aircraft guns in deck mounts

on side, evenly spread

Weight of broadside 327 lbs / 148 kg

Shells per gun, main battery: 300

6 - 23,0" / 584,2 mm above water torpedoes

Armour:

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)

Main: 1,18" / 30 mm 0,04" / 1 mm 0,39" / 10 mm

2nd: 0,59" / 15 mm - -

3rd: 0,39" / 10 mm - -

Machinery:

Oil fired boilers, steam turbines,

Geared drive, 2 shafts, 54.063 shp / 40.331 Kw = 33,50 kts

Range 4.500nm at 16,00 kts

Bunker at max displacement = 454 tons

Complement:

173 - 225

Cost:

£2,091 million / $8,364 million

Distribution of weights at normal displacement:

Armament: 49 tons, 2,0 %

Armour: 9 tons, 0,4 %

- Belts: 0 tons, 0,0 %

- Torpedo bulkhead: 0 tons, 0,0 %

- Armament: 9 tons, 0,4 %

- Armour Deck: 0 tons, 0,0 %

- Conning Tower: 0 tons, 0,0 %

Machinery: 1.143 tons, 46,9 %

Hull, fittings & equipment: 724 tons, 29,7 %

Fuel, ammunition & stores: 357 tons, 14,6 %

Miscellaneous weights: 157 tons, 6,4 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship):

677 lbs / 307 Kg = 12,8 x 4,7 " / 120 mm shells or 0,3 torpedoes

Stability (Unstable if below 1.00): 1,17

Metacentric height 1,2 ft / 0,4 m

Roll period: 12,2 seconds

Steadiness - As gun platform (Average = 50 %): 51 %

- Recoil effect (Restricted arc if above 1.00): 0,64

Seaboat quality (Average = 1.00): 1,13

Hull form characteristics:

Hull has rise forward of midbreak

Block coefficient: 0,470

Length to Beam Ratio: 10,71 : 1

'Natural speed' for length: 18,65 kts

Power going to wave formation at top speed: 69 %

Trim (Max stability = 0, Max steadiness = 100): 45

Bow angle (Positive = bow angles forward): 0,00 degrees

Stern overhang: 3,28 ft / 1,00 m

Freeboard (% = measuring location as a percentage of overall length):

- Stem: 21,33 ft / 6,50 m

- Forecastle (20 %): 19,69 ft / 6,00 m

- Mid (50 %): 19,69 ft / 6,00 m (16,40 ft / 5,00 m aft of break)

- Quarterdeck (15 %): 13,12 ft / 4,00 m

- Stern: 13,12 ft / 4,00 m

- Average freeboard: 17,11 ft / 5,22 m

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 174,6 %

- Above water (accommodation/working, high = better): 77,1 %

Waterplane Area: 7.328 Square feet or 681 Square metres

Displacement factor (Displacement / loading): 77 %

Structure weight / hull surface area: 40 lbs/sq ft or 193 Kg/sq metre

Hull strength (Relative):

- Cross-sectional: 0,52

- Longitudinal: 3,60

- Overall: 0,63

Hull space for machinery, storage, compartmentation is cramped

Room for accommodation and workspaces is cramped

Electronics (45 tons)

HVAC (12 tons)

LRASM Modele 1947 2x4 32cm launchers and reloads (15 tons)

Crew confort (85 tons)

Electronics:

DRBV-9 surface and air search radar (1 radar, 7.5 tons)

DRBI-3 sentry radar (1 radar, 7.5 tons)

DRBN-1 navigational surface and air search radar (1 radar, 2 tons)

DRBC-4 (DRBC-3B is ascceptable) fire-control radar (2 radars, 8 tons)

ARBR-1 radar jammer/detector (2 units, 2 tons)

SAGEM HF/DF (3 tons)

8.643 t light; 9.176 t standard; 10.178 t normal; 10.980 t full load

570,00 ft / 557,00 ft x 62,00 ft x 19,50 ft (normal load)

173,73 m / 169,77 m x 18,90 m x 5,94 m

12 - 6,00" / 152 mm guns (4x3 guns), 108,00lbs / 48,99kg shells, 1949 Model

Automatic rapid fire guns in turrets (on barbettes)

on centreline ends, evenly spread

8 - 5,00" / 127 mm guns (4x2 guns), 62,50lbs / 28,35kg shells, 1940 Model

Dual purpose guns in deck mounts with hoists

on side, all amidships

16 - 1,57" / 39,9 mm guns (4x4 guns), 1,93lbs / 0,88kg shells, 1940 Model

Anti-aircraft guns in deck mounts

on side, evenly spread

8 - 1,57" / 39,9 mm guns (2x4 guns), 1,93lbs / 0,88kg shells, 1940 Model

Anti-aircraft guns in deck mounts

on side, evenly spread

8 - 0,98" / 24,9 mm guns (4x2 guns), 0,47lbs / 0,21kg shells, 1940 Model

Anti-aircraft guns in deck mounts

on side, evenly spread

Weight of broadside 1.846 lbs / 837 kg

Shells per gun, main battery: 300

8 - 24,0" / 609,6 mm above water torpedoes

- Belts: Width (max) Length (avg) Height (avg)

Main: 4,00" / 102 mm 362,00 ft / 110,34 m 11,45 ft / 3,49 m

Ends: Unarmoured

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: 4,00" / 102 mm 1,00" / 25 mm 2,00" / 51 mm

2nd: 2,00" / 51 mm 0,50" / 13 mm 1,00" / 25 mm

3rd: 0,38" / 10 mm - -

4th: 0,38" / 10 mm - -

5th: 0,50" / 13 mm - -

- Armour deck: 2,00" / 51 mm, Conning tower: 3,00" / 76 mm

Oil fired boilers, steam turbines,

Geared drive, 4 shafts, 93.034 shp / 69.403 Kw = 32,22 kts

Range 7.245nm at 16,00 kts

Bunker at max displacement = 1.803 tons

506 - 658

£5,231 million / $20,924 million

Armament: 263 tons, 2,6 %

Armour: 1.827 tons, 17,9 %

- Belts: 698 tons, 6,9 %

- Torpedo bulkhead: 0 tons, 0,0 %

- Armament: 224 tons, 2,2 %

- Armour Deck: 874 tons, 8,6 %

- Conning Tower: 30 tons, 0,3 %

Machinery: 2.488 tons, 24,4 %

Hull, fittings & equipment: 3.916 tons, 38,5 %

Fuel, ammunition & stores: 1.535 tons, 15,1 %

Miscellaneous weights: 150 tons, 1,5 %

Survivability (Non-critical penetrating hits needed to sink ship):

12.026 lbs / 5.455 Kg = 111,4 x 6,0 " / 152 mm shells or 1,5 torpedoes

Stability (Unstable if below 1.00): 1,12

Metacentric height 3,0 ft / 0,9 m

Roll period: 15,0 seconds

Steadiness - As gun platform (Average = 50 %): 69 %

- Recoil effect (Restricted arc if above 1.00): 0,47

Seaboat quality (Average = 1.00): 1,07

Hull has rise forward of midbreak

Block coefficient: 0,529

Length to Beam Ratio: 8,98 : 1

'Natural speed' for length: 23,60 kts

Power going to wave formation at top speed: 60 %

Trim (Max stability = 0, Max steadiness = 100): 65

Bow angle (Positive = bow angles forward): 20,00 degrees

Stern overhang: 2,44 ft / 0,74 m

Freeboard (% = measuring location as a percentage of overall length):

- Stem: 29,00 ft / 8,84 m

- Forecastle (20 %): 25,00 ft / 7,62 m

- Mid (50 %): 25,00 ft / 7,62 m (17,00 ft / 5,18 m aft of break)

- Quarterdeck (15 %): 17,00 ft / 5,18 m

- Stern: 17,00 ft / 5,18 m

- Average freeboard: 21,32 ft / 6,50 m

Space - Hull below water (magazines/engines, low = better): 102,7 %

- Above water (accommodation/working, high = better): 145,7 %

Waterplane Area: 23.633 Square feet or 2.196 Square metres

Displacement factor (Displacement / loading): 112 %

Structure weight / hull surface area: 103 lbs/sq ft or 505 Kg/sq metre

Hull strength (Relative):

- Cross-sectional: 0,94

- Longitudinal: 1,65

- Overall: 1,00

Hull space for machinery, storage, compartmentation is adequate

Room for accommodation and workspaces is excellent

On that note I think it would be easier to exchange the triple 6" turrets for twin 7.48" but again you would have to change the shell hoists and modify the magazines for larger shells and more propellant, which again would be very costly. You could consider removing a triple 6" turret aft and add a larger AA gun, something like a 2.95" auto/AA, and reduce the 40mm outfit slightly. Some would argue that having 75mm and 40mm guns is having too many caliber's in the same size range, or it complicates the ships logistics having to carry so many different types of shells, so its worth considering standardizing your AA armament to a larger caliber rather than having a hodge podge of various guns.

There is another option (that would also be costly) and that is to replace the triple 6" turrets with twin auto 6" turrets. You would still have to replace shell handling equipment and add new turrets but the space should be there in the barbettes and Magazine space might (emphasis on might) be adequate.

P.S.: I am in bed so If can't publish the update version.

Perhaps I can offer a bit of a reality check by addressing the mathematics. I'm not sure which 6" gun the Greeks used in 1940, but I suspect it's either a licensed or exported variant of the British 6"/50 Mark XXIII gun. That's already a pretty good gun for this period, with 6-8 rounds per minute. The necessary automation during this era will add in around 50% as much weight as a standard breech-loading gun. Therefore, you'd end up with two barrels instead of three.

That means, in order to justify the change, your 6" auto needs to reliably fire twelve rounds per minute in order to break even, compared to your previous breech-loader.

If you can only equal your previous rate of fire, then you'll spend a significant amount of money to develop an extremely complicated bit of machinery (that will probably break the moment you need it most)...

Its got decent speed and armor, overall comparable to the historical Southampton class cruisers. They are only 7 years old so other than the worlds navies moving towards auto loading guns she hasn't been rendered obsolete by design advancements, far from it. With light refits to upgrade her AA capabilities and her electronics these two ships will still provide excellent service for the Greeks.

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