Norse Ship Designs 1913+

Desertfox · March 31, 2021, 05:31:35 PM

Follow on to the Thor (Nevada) class. Bigger hull to hold four triples, no other changes.

Hela
Surtur

Hela (Arizona), Norse Battleship laid down 1913

Displacement:
   28,797 t light; 30,724 t standard; 31,881 t normal; 32,806 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (600.00 ft / 600.00 ft) x 93.50 ft x (30.00 / 30.75 ft)
   (182.88 m / 182.88 m) x 28.50 m x (9.14 / 9.37 m)

Armament:
12 - 13.98" / 355 mm 45.0 cal guns - 1,376.70lbs / 624.46kg shells, 120 per gun
     Breech loading guns in turret on barbette mounts, 1913 Model
     4 x 3-gun mounts on centreline ends, evenly spread
      2 raised mounts - superfiring
22 - 4.72" / 120 mm 50.0 cal guns - 55.82lbs / 25.32kg shells, 250 per gun
     Quick firing guns in casemate mounts, 1913 Model
     22 x Single mounts on sides, evenly spread
      22 hull mounts in casemates- Limited use in heavy seas
10 - 2.24" / 57.0 mm 50.0 cal guns - 5.98lbs / 2.71kg shells, 400 per gun
     Quick firing guns in deck and hoist mounts, 1913 Model
     10 x Single mounts on sides, evenly spread
      2 raised mounts
8 - 1.46" / 37.0 mm 50.0 cal guns - 1.64lbs / 0.74kg shells, 500 per gun
     Quick firing guns in deck and hoist mounts, 1913 Model
     8 x Single mounts on sides, evenly spread
      8 raised mounts
8 - 0.59" / 15.0 mm 90.0 cal guns - 0.12lbs / 0.05kg shells, 1,200 per gun
     Machine guns in deck mounts, 1913 Model
     8 x Single mounts on sides, evenly spread
      8 raised mounts
Weight of broadside 17,822 lbs / 8,084 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   14.0" / 356 mm   370.00 ft / 112.78 m   12.00 ft / 3.66 m
   Ends:   4.00" / 102 mm   230.00 ft / 70.10 m   12.00 ft / 3.66 m
   Upper:   8.00" / 203 mm   370.00 ft / 112.78 m   8.00 ft / 2.44 m
     Main Belt covers 95 % of normal length

- Torpedo Bulkhead - Additional damage containing bulkheads:
      2.00" / 51 mm   375.00 ft / 114.30 m   30.00 ft / 9.14 m
   Beam between torpedo bulkheads 80.00 ft / 24.38 m

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   18.0" / 457 mm   10.0" / 254 mm      13.0" / 330 mm
   2nd:   8.00" / 203 mm   6.00" / 152 mm      6.00" / 152 mm

- Armoured deck - multiple decks:
   For and Aft decks: 3.00" / 76 mm
   Forecastle: 3.00" / 76 mm Quarter deck: 3.00" / 76 mm

- Conning towers: Forward 15.00" / 381 mm, Aft 8.00" / 203 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 36,730 shp / 27,400 Kw = 21.00 kts
   Range 7,000nm at 10.00 kts
   Bunker at max displacement = 2,082 tons

Complement:
   1,192 - 1,550

Cost:
   £3.081 million / $12.326 million

Distribution of weights at normal displacement:
   Armament: 3,703 tons, 11.6 %
     - Guns: 3,703 tons, 11.6 %
   Armour: 12,165 tons, 38.2 %
     - Belts: 4,232 tons, 13.3 %
     - Torpedo bulkhead: 833 tons, 2.6 %
     - Armament: 4,170 tons, 13.1 %
     - Armour Deck: 2,433 tons, 7.6 %
     - Conning Towers: 498 tons, 1.6 %
   Machinery: 1,439 tons, 4.5 %
   Hull, fittings & equipment: 10,424 tons, 32.7 %
   Fuel, ammunition & stores: 3,084 tons, 9.7 %
   Miscellaneous weights: 1,065 tons, 3.3 %
     - Hull below water: 260 tons
     - Hull above water: 260 tons
     - On freeboard deck: 175 tons
     - Above deck: 370 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     47,666 lbs / 21,621 Kg = 34.9 x 14.0 " / 355 mm shells or 7.8 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 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.89
   Seaboat quality (Average = 1.00): 1.51

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.663 / 0.666
   Length to Beam Ratio: 6.42 : 1
   'Natural speed' for length: 24.49 kts
   Power going to wave formation at top speed: 45 %
   Trim (Max stability = 0, Max steadiness = 100): 33
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   20.00 %, 26.00 ft / 7.92 m, 25.00 ft / 7.62 m
     - Forward deck:   30.00 %, 25.00 ft / 7.62 m, 25.00 ft / 7.62 m
     - Aft deck:   35.00 %, 17.00 ft / 5.18 m, 17.00 ft / 5.18 m
     - Quarter deck:   15.00 %, 17.00 ft / 5.18 m, 17.00 ft / 5.18 m
     - Average freeboard:      21.08 ft / 6.43 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 74.4 %
      - Above water (accommodation/working, high = better): 143.8 %
   Waterplane Area: 43,490 Square feet or 4,040 Square metres
   Displacement factor (Displacement / loading): 101 %
   Structure weight / hull surface area: 200 lbs/sq ft or 977 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.94
      - Longitudinal: 1.70
      - Overall: 1.00
   Excellent machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

-260t Damage Control
-260t Climate Control
-100t Flag Facilities
-75t LR wireless + Remote Sensing
-370t FC

The Rock Doctor · March 31, 2021, 05:56:00 PM

Seems reasonable.

snip · March 31, 2021, 06:51:36 PM

Stacks up well with the Audax class a year this design's senior and is consistent with prior Norse practice.

Jefgte · April 01, 2021, 12:43:49 AM

Logical progress

Desertfox · April 01, 2021, 11:49:37 AM

Bigger G-class. Significantly upgraded armament and slight boosts to speed and range.

H-class, Norse Destroyer laid down 1914

Displacement:
   890 t light; 932 t standard; 1,025 t normal; 1,100 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (290.00 ft / 290.00 ft) x 27.50 ft x (10.00 / 10.52 ft)
   (88.39 m / 88.39 m) x 8.38 m x (3.05 / 3.21 m)

Armament:
1 - 4.72" / 120 mm 50.0 cal gun - 55.82lbs / 25.32kg shells, 200 per gun
     Quick firing gun in deck and hoist mount, 1914 Model
     1 x Single mount on centreline, forward deck centre
3 - 3.94" / 100 mm 50.0 cal guns - 32.30lbs / 14.65kg shells, 200 per gun
     Quick firing guns in deck and hoist mounts, 1914 Model
     3 x Single mounts on sides, evenly spread
      2 raised mounts
4 - 2.24" / 57.0 mm 50.0 cal guns - 5.98lbs / 2.71kg shells, 300 per gun
     Quick firing guns in deck mounts, 1914 Model
     4 x Single mounts on sides, evenly spread
Weight of broadside 177 lbs / 80 kg

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 22,041 shp / 16,443 Kw = 30.25 kts
   Range 5,050nm at 10.00 kts
   Bunker at max displacement = 169 tons

Complement:
   89 - 117

Cost:
   £0.154 million / $0.616 million

Distribution of weights at normal displacement:
   Armament: 52 tons, 5.1 %
     - Guns: 52 tons, 5.1 %
   Machinery: 515 tons, 50.2 %
   Hull, fittings & equipment: 266 tons, 25.9 %
   Fuel, ammunition & stores: 135 tons, 13.2 %
   Miscellaneous weights: 58 tons, 5.7 %
     - Hull below water: 5 tons
     - Hull above water: 5 tons
     - On freeboard deck: 18 tons
     - Above deck: 30 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     248 lbs / 112 Kg = 4.7 x 4.7 " / 120 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.13
   Metacentric height 0.9 ft / 0.3 m
   Roll period: 12.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.63
   Seaboat quality (Average = 1.00): 0.84

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.450 / 0.459
   Length to Beam Ratio: 10.55 : 1
   'Natural speed' for length: 17.03 kts
   Power going to wave formation at top speed: 67 %
   Trim (Max stability = 0, Max steadiness = 100): 60
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   15.00 %, 16.50 ft / 5.03 m, 16.50 ft / 5.03 m
     - Forward deck:   20.00 %, 16.50 ft / 5.03 m, 16.50 ft / 5.03 m
     - Aft deck:   50.00 %, 9.00 ft / 2.74 m, 9.00 ft / 2.74 m
     - Quarter deck:   15.00 %, 9.00 ft / 2.74 m, 9.00 ft / 2.74 m
     - Average freeboard:      11.63 ft / 3.54 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 179.5 %
      - Above water (accommodation/working, high = better): 121.3 %
   Waterplane Area: 5,087 Square feet or 473 Square metres
   Displacement factor (Displacement / loading): 53 %
   Structure weight / hull surface area: 30 lbs/sq ft or 146 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.67
      - Overall: 0.57
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

-5t Damage control
-5t Climate Control
-25t LR Wireless
-5t FC
-18t 4 x 53cm TT + 2 reloads

The Rock Doctor · April 02, 2021, 09:13:45 AM

I kinda like the mixed-battery design Foxy's got.

eltf177 · April 02, 2021, 01:36:05 PM

Were the original stats for the I-class destroyers ever posted, can't seem to find them.

Desertfox · April 06, 2021, 10:54:55 AM

Improved version of previous class, homogeneous 155mm main battery, more torpedoes, more speed and range.

Danae, Norse Light Cruiser laid down 1915

Displacement:
   4,801 t light; 4,973 t standard; 5,408 t normal; 5,756 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (455.00 ft / 455.00 ft) x 50.00 ft x (16.00 / 16.79 ft)
   (138.68 m / 138.68 m) x 15.24 m x (4.88 / 5.12 m)

Armament:
6 - 6.10" / 155 mm 50.0 cal guns - 120.29lbs / 54.56kg shells, 150 per gun
     Quick firing guns in deck and hoist mounts, 1915 Model
     6 x Single mounts on centreline, evenly spread
      2 raised mounts
4 - 1.85" / 47.0 mm 45.0 cal guns - 3.19lbs / 1.45kg shells, 450 per gun
     Breech loading guns in deck and hoist mounts, 1915 Model
     4 x Single mounts on sides, evenly spread
Weight of broadside 734 lbs / 333 kg

Armour:
- Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   3.00" / 76 mm   390.00 ft / 118.87 m   8.00 ft / 2.44 m
   Ends:   2.00" / 51 mm     65.00 ft / 19.81 m   8.00 ft / 2.44 m
     Main Belt covers 132 % of normal length

- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.00" / 25 mm     -           -

- Armoured deck - multiple decks:
   For and Aft decks: 1.00" / 25 mm
   Forecastle: 1.00" / 25 mm Quarter deck: 1.00" / 25 mm

- Conning towers: Forward 0.00" / 0 mm, Aft 4.00" / 102 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 4 shafts, 51,011 shp / 38,054 Kw = 30.00 kts
   Range 8,850nm at 10.00 kts
   Bunker at max displacement = 783 tons

Complement:
   314 - 409

Cost:
   £0.750 million / $3.001 million

Distribution of weights at normal displacement:
   Armament: 217 tons, 4.0 %
     - Guns: 217 tons, 4.0 %
   Armour: 740 tons, 13.7 %
     - Belts: 409 tons, 7.6 %
     - Armament: 17 tons, 0.3 %
     - Armour Deck: 288 tons, 5.3 %
     - Conning Tower: 27 tons, 0.5 %
   Machinery: 1,932 tons, 35.7 %
   Hull, fittings & equipment: 1,663 tons, 30.8 %
   Fuel, ammunition & stores: 607 tons, 11.2 %
   Miscellaneous weights: 249 tons, 4.6 %
     - Hull below water: 50 tons
     - Hull above water: 50 tons
     - On freeboard deck: 64 tons
     - Above deck: 85 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     3,427 lbs / 1,554 Kg = 30.2 x 6.1 " / 155 mm shells or 0.8 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 2.1 ft / 0.7 m
   Roll period: 14.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.40
   Seaboat quality (Average = 1.00): 1.00

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.520 / 0.527
   Length to Beam Ratio: 9.10 : 1
   'Natural speed' for length: 21.33 kts
   Power going to wave formation at top speed: 61 %
   Trim (Max stability = 0, Max steadiness = 100): 70
   Bow angle (Positive = bow angles forward): 0.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = length of deck as a percentage of waterline length):
            Fore end,    Aft end
     - Forecastle:   24.00 %, 25.00 ft / 7.62 m, 22.00 ft / 6.71 m
     - Forward deck:   20.00 %, 22.00 ft / 6.71 m, 22.00 ft / 6.71 m
     - Aft deck:   41.00 %, 13.00 ft / 3.96 m, 13.00 ft / 3.96 m
     - Quarter deck:   15.00 %, 13.00 ft / 3.96 m, 13.00 ft / 3.96 m
     - Average freeboard:      17.25 ft / 5.26 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 130.9 %
      - Above water (accommodation/working, high = better): 149.4 %
   Waterplane Area: 15,439 Square feet or 1,434 Square metres
   Displacement factor (Displacement / loading): 97 %
   Structure weight / hull surface area: 72 lbs/sq ft or 350 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.85
      - Longitudinal: 1.43
      - Overall: 0.90
   Caution: Hull subject to strain in open-sea
   Cramped machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Ship has slow, easy roll, a good, steady gun platform

-50t FC and Remote Sensing
-50t LR Wireless and Flag Facilities
-50t Climate Control
-50t Damage Control
-24t Torpedo Tubes 4 x 21" + 4 Reloads

The Rock Doctor · April 06, 2021, 06:08:05 PM

It's a good, solid design. Should serve the Norse well.

Jefgte · April 07, 2021, 07:56:49 AM

Good scout design to do the job.

Khryses · April 14, 2021, 11:52:32 PM

A new destroyer class aimed at pursuing the needs of the Norse People all around the world as required - either in small groups, or in support of larger vessels.

Snekkja, Norse Destroyer laid down 1916

Displacement:
   1,500 t light; 1,570 t standard; 1,824 t normal; 2,028 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (369.89 ft / 360.89 ft) x 32.81 ft x (12.47 / 13.42 ft)
   (112.74 m / 110.00 m) x 10.00 m x (3.80 / 4.09 m)

Armament:
2 - 6.10" / 155 mm 45.0 cal guns - 114.59lbs / 51.98kg shells, 125 per gun
     Quick firing guns in deck mounts, 1916 Model
     2 x Single mounts on centreline, forward evenly spread
      1 raised mount
2 - 6.10" / 155 mm 45.0 cal guns - 114.59lbs / 51.98kg shells, 125 per gun
     Quick firing guns in deck mounts, 1916 Model
     2 x Single mounts on centreline, aft evenly spread
      1 raised mount
4 - 0.59" / 15.0 mm 90.0 cal guns - 0.12lbs / 0.05kg shells, 4,000 per gun
     Machine guns in deck mounts, 1916 Model
     4 x Single mounts on sides, evenly spread
Weight of broadside 459 lbs / 208 kg

Armour:
- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.18" / 30 mm     -           -
   2nd:   1.18" / 30 mm     -           -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 3 shafts, 35,068 shp / 26,161 Kw = 32.00 kts, TrialSpeed 32.5 kts
   Range 5,000nm at 14.00 kts
   Bunker at max displacement = 458 tons

Complement:
   139 - 181

Cost:
   £0.346 million / $1.384 million

Distribution of weights at normal displacement:
   Armament: 78 tons, 4.3 %
     - Guns: 78 tons, 4.3 %
   Armour: 13 tons, 0.7 %
     - Armament: 13 tons, 0.7 %
   Machinery: 979 tons, 53.7 %
   Hull, fittings & equipment: 392 tons, 21.5 %
   Fuel, ammunition & stores: 324 tons, 17.7 %
   Miscellaneous weights: 37 tons, 2.0 %
     - Hull above water: 4 tons
     - On freeboard deck: 30 tons
     - Above deck: 3 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     425 lbs / 193 Kg = 3.7 x 6.1 " / 155 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.53
   Metacentric height 1.9 ft / 0.6 m
   Roll period: 9.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 46 %
         - Recoil effect (Restricted arc if above 1.00): 0.34
   Seaboat quality (Average = 1.00): 0.86

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.432 / 0.446
   Length to Beam Ratio: 11.00 : 1
   'Natural speed' for length: 19.00 kts
   Power going to wave formation at top speed: 64 %
   Trim (Max stability = 0, Max steadiness = 100): 49
   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 %, 21.33 ft / 6.50 m, 18.37 ft / 5.60 m
     - Forward deck:   30.00 %, 18.37 ft / 5.60 m, 12.47 ft / 3.80 m
     - Aft deck:   35.00 %, 8.56 ft / 2.61 m, 8.56 ft / 2.61 m
     - Quarter deck:   15.00 %, 8.56 ft / 2.61 m, 8.56 ft / 2.61 m
     - Average freeboard:      12.82 ft / 3.91 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 185.3 %
      - Above water (accommodation/working, high = better): 119.7 %
   Waterplane Area: 7,449 Square feet or 692 Square metres
   Displacement factor (Displacement / loading): 64 %
   Structure weight / hull surface area: 32 lbs/sq ft or 156 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.15
      - Overall: 0.55
   Cramped machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

Misc Weight:
-- 27t 3 x 3 21" Torpedos in swivel mounts, centreline
-- 7t 1912 FC (split between above water and above deck)
-- 3t Night Fighting Equipment

snip · April 14, 2021, 11:58:25 PM

I think its going to be a much to lively platform for 155's and the crew is likey to get worn out quickly schlepping those rounds about. Sure, the 155 is going to end anythign sort of a 1500t can in one hit, but getting that hit might prove more challenging than with a smaller gun that can fire faster for longer. Also, the design does not have great seakeeping, so its theoretically fast speed will degrade much faster in a seaway than a comprible boat with higher seakeeping. I'd drop down to something in the 120-130mm range (I think you have such a gun available) and turn the reserve into more freeboard.

Khryses · April 15, 2021, 12:31:26 AM

I'll think on it before I commit to building anything, and I'd welcome more feedback. I know there are many other Destroyers around with less than perfect seakeeping, and it's only a little below average for steadiness firing those things.

In a destroyer, ending the fight sooner rather than later feels more important than getting lots of rounds on target - because in a sustained gunfight they're just as likely to be taking their own knocks too, and a destroyer doesn't have that kind of staying power.

I'm more ambivalent about her sister-class the Skeid, which is emphatically not designed for Atlantic cannonball transits but does have other attractions:

Skeid, Norse Destroyer laid down 1916

Displacement:
   1,500 t light; 1,570 t standard; 1,653 t normal; 1,719 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (369.89 ft / 360.89 ft) x 32.81 ft x (12.47 / 12.79 ft)
   (112.74 m / 110.00 m) x 10.00 m x (3.80 / 3.90 m)

Armament:
3 - 6.10" / 155 mm 45.0 cal guns - 114.59lbs / 51.98kg shells, 150 per gun
     Quick firing guns in deck mounts, 1916 Model
     2 x Single mounts on sides, forward deck centre
     1 x Single mount on centreline, forward deck centre
      1 raised mount
1 - 6.10" / 155 mm 45.0 cal gun - 114.59lbs / 51.98kg shells, 125 per gun
     Quick firing gun in deck mount, 1916 Model
     1 x Single mount on centreline, aft deck centre
4 - 0.59" / 15.0 mm 90.0 cal guns - 0.12lbs / 0.05kg shells, 4,000 per gun
     Machine guns in deck mounts, 1916 Model
     4 x Single mounts on sides, evenly spread
Weight of broadside 459 lbs / 208 kg

Armour:
- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.18" / 30 mm   0.79" / 20 mm        -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 3 shafts, 41,518 shp / 30,973 Kw = 34.00 kts, TS 34.5 kts
   Range 1,600nm at 14.00 kts
   Bunker at max displacement = 149 tons

Complement:
   129 - 168

Cost:
   £0.342 million / $1.367 million

Distribution of weights at normal displacement:
   Armament: 78 tons, 4.7 %
     - Guns: 78 tons, 4.7 %
   Armour: 19 tons, 1.2 %
     - Armament: 19 tons, 1.2 %
   Machinery: 961 tons, 58.1 %
   Hull, fittings & equipment: 395 tons, 23.9 %
   Fuel, ammunition & stores: 153 tons, 9.3 %
   Miscellaneous weights: 46 tons, 2.8 %
     - Hull above water: 4 tons
     - On freeboard deck: 39 tons
     - Above deck: 3 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     322 lbs / 146 Kg = 2.8 x 6.1 " / 155 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.37
   Metacentric height 1.6 ft / 0.5 m
   Roll period: 10.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.33
   Seaboat quality (Average = 1.00): 0.86

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.392 / 0.397
   Length to Beam Ratio: 11.00 : 1
   'Natural speed' for length: 19.00 kts
   Power going to wave formation at top speed: 65 %
   Trim (Max stability = 0, Max steadiness = 100): 58
   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 %, 21.33 ft / 6.50 m, 18.37 ft / 5.60 m
     - Forward deck:   30.00 %, 18.37 ft / 5.60 m, 12.47 ft / 3.80 m
     - Aft deck:   40.00 %, 8.56 ft / 2.61 m, 8.56 ft / 2.61 m
     - Quarter deck:   10.00 %, 8.56 ft / 2.61 m, 8.56 ft / 2.61 m
     - Average freeboard:      12.82 ft / 3.91 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 201.0 %
      - Above water (accommodation/working, high = better): 123.1 %
   Waterplane Area: 7,249 Square feet or 673 Square metres
   Displacement factor (Displacement / loading): 49 %
   Structure weight / hull surface area: 33 lbs/sq ft or 161 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.27
      - Overall: 0.55
   Extremely poor machinery, storage, compartmentation space
   Excellent accommodation and workspace room
   Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

Misc Weight:
-- 36t 4 x 3 21" Torpedos in swivel mounts, centreline
-- 7t 1912 FC (split between above water and above deck)
-- 3t Night Fighting Equipment

Khryses · April 15, 2021, 12:45:19 AM

Quote from: snip on April 14, 2021, 11:58:25 PM
I think its going to be a much to lively platform for 155's and the crew is likey to get worn out quickly schlepping those rounds about. Sure, the 155 is going to end anythign sort of a 1500t can in one hit, but getting that hit might prove more challenging than with a smaller gun that can fire faster for longer. Also, the design does not have great seakeeping, so its theoretically fast speed will degrade much faster in a seaway than a comprible boat with higher seakeeping. I'd drop down to something in the 120-130mm range (I think you have such a gun available) and turn the reserve into more freeboard.

Snekkja mk2

Actually just doing some small tweaks to Performance and I think this answers most of your concerns barring installing a deck-and-hoist mount system:

Snekkja, Norse Destroyer laid down 1916

Displacement:
   1,500 t light; 1,570 t standard; 1,824 t normal; 2,028 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
   (369.89 ft / 360.89 ft) x 32.81 ft x (12.47 / 13.42 ft)
   (112.74 m / 110.00 m) x 10.00 m x (3.80 / 4.09 m)

Armament:
2 - 6.10" / 155 mm 45.0 cal guns - 114.59lbs / 51.98kg shells, 125 per gun
     Quick firing guns in deck mounts, 1916 Model
     2 x Single mounts on centreline, forward evenly spread
      1 raised mount
2 - 6.10" / 155 mm 45.0 cal guns - 114.59lbs / 51.98kg shells, 125 per gun
     Quick firing guns in deck mounts, 1916 Model
     2 x Single mounts on centreline, aft evenly spread
      1 raised mount
4 - 0.59" / 15.0 mm 90.0 cal guns - 0.12lbs / 0.05kg shells, 4,000 per gun
     Machine guns in deck mounts, 1916 Model
     4 x Single mounts on sides, evenly spread
Weight of broadside 459 lbs / 208 kg

Armour:
- Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.18" / 30 mm     -           -
   2nd:   1.18" / 30 mm     -           -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 3 shafts, 35,068 shp / 26,161 Kw = 32.00 kts, 32.5 kts in Trial
   Range 5,000nm at 14.00 kts
   Bunker at max displacement = 458 tons

Complement:
   139 - 181

Cost:
   £0.346 million / $1.384 million

Distribution of weights at normal displacement:
   Armament: 78 tons, 4.3 %
     - Guns: 78 tons, 4.3 %
   Armour: 13 tons, 0.7 %
     - Armament: 13 tons, 0.7 %
   Machinery: 979 tons, 53.7 %
   Hull, fittings & equipment: 392 tons, 21.5 %
   Fuel, ammunition & stores: 324 tons, 17.7 %
   Miscellaneous weights: 37 tons, 2.0 %
     - Hull above water: 4 tons
     - On freeboard deck: 30 tons
     - Above deck: 3 tons

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     419 lbs / 190 Kg = 3.7 x 6.1 " / 155 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.49
   Metacentric height 1.9 ft / 0.6 m
   Roll period: 10.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.35
   Seaboat quality (Average = 1.00): 0.93

Hull form characteristics:
   Hull has rise forward of midbreak,
     a normal bow and a cruiser stern
   Block coefficient (normal/deep): 0.432 / 0.446
   Length to Beam Ratio: 11.00 : 1
   'Natural speed' for length: 19.00 kts
   Power going to wave formation at top speed: 64 %
   Trim (Max stability = 0, Max steadiness = 100): 53
   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 %, 21.33 ft / 6.50 m, 18.37 ft / 5.60 m
     - Forward deck:   30.00 %, 18.37 ft / 5.60 m, 12.47 ft / 3.80 m
     - Aft deck:   35.00 %, 8.56 ft / 2.61 m, 8.56 ft / 2.61 m
     - Quarter deck:   15.00 %, 8.56 ft / 2.61 m, 8.56 ft / 2.61 m
     - Average freeboard:      12.82 ft / 3.91 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 185.3 %
      - Above water (accommodation/working, high = better): 119.7 %
   Waterplane Area: 7,449 Square feet or 692 Square metres
   Displacement factor (Displacement / loading): 64 %
   Structure weight / hull surface area: 32 lbs/sq ft or 156 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.15
      - Overall: 0.55
   Cramped machinery, storage, compartmentation space
   Adequate accommodation and workspace room
   Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

Misc Weight:
-- 27t 3 x 3 21" Torpedos in swivel mounts, centreline
-- 7t 1912 FC (split between above water and above deck)
-- 3t Night Fighting Equipment

Jefgte · April 15, 2021, 01:05:32 AM

QuoteCramped machinery, storage, compartmentation space
Adequate accommodation and workspace room
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

Your DD is always poor seaboat with poor perf. with speed attack...

Reduce the speed to about 30kts & calculate the top speed.

https://www.navalism.org/index.php/topic,7032.0.html

Have confortable sea qualities is important to have good result during a battle.

https://www.navalism.org/index.php/topic,7641.0.html