WesWorld

29 class, Nordmark Destroyers laid down 1929

Displacement:
1,553 t light; 1,609 t standard; 1,930 t normal; 2,186 t full load

Dimensions: Length overall / water x beam x draught
348.53 ft / 345.00 ft x 29.00 ft x 15.00 ft (normal load)
106.23 m / 105.16 m x 8.84 m x 4.57 m

Armament:
4 - 4.30" / 109 mm guns in single mounts, 39.75lbs / 18.03kg shells, 1929 Model
Breech loading guns in Coles/Ericsson turrets
on centreline ends, evenly spread, 2 raised mounts
2 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1929 Model
Anti-aircraft guns in deck mounts
on side, all amidships
4 - 1.46" / 37.0 mm guns (2x2 guns), 1.55lbs / 0.70kg shells, 1929 Model
Breech loading guns in deck mounts
on side, evenly spread
2 - 1.90" / 48.3 mm guns in single mounts, 3.43lbs / 1.56kg shells, 1929 Model
Quick firing guns in deck mounts
on side, evenly spread
Weight of broadside 199 lbs / 90 kg
Shells per gun, main battery: 150
4 - 21.0" / 533.4 mm above water torpedoes

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

- Conning tower: 3.00" / 76 mm

Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 42,599 shp / 31,779 Kw = 33.00 kts
Range 6,500nm at 15.00 kts
Bunker at max displacement = 577 tons

Complement:
145 - 189

Cost:
£0.874 million / $3.495 million

Distribution of weights at normal displacement:
Armament: 25 tons, 1.3 %
Armour: 46 tons, 2.4 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 36 tons, 1.9 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 10 tons, 0.5 %
Machinery: 1,023 tons, 53.0 %
Hull, fittings & equipment: 439 tons, 22.8 %
Fuel, ammunition & stores: 377 tons, 19.5 %
Miscellaneous weights: 20 tons, 1.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
394 lbs / 179 Kg = 9.9 x 4.3 " / 109 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.34
Metacentric height 1.3 ft / 0.4 m
Roll period: 10.6 seconds
Steadiness - As gun platform (Average = 50 %): 45 %
- Recoil effect (Restricted arc if above 1.00): 0.41
Seaboat quality (Average = 1.00): 0.81

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.450
Length to Beam Ratio: 11.90 : 1
'Natural speed' for length: 18.57 kts
Power going to wave formation at top speed: 66 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 20.00 ft / 6.10 m
- Forecastle (20 %): 12.42 ft / 3.79 m
- Mid (50 %): 12.42 ft / 3.79 m
- Quarterdeck (15 %): 12.42 ft / 3.79 m
- Stern: 12.42 ft / 3.79 m
- Average freeboard: 13.03 ft / 3.97 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 182.2 %
- Above water (accommodation/working, high = better): 75.4 %
Waterplane Area: 6,382 Square feet or 593 Square metres
Displacement factor (Displacement / loading): 67 %
Structure weight / hull surface area: 31 lbs/sq ft or 151 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.48
- Longitudinal: 1.51
- Overall: 0.54
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

29-1 to 9 built

You definitely don't want Coles/Ericsson turrets, those are for 19th century ironclads. Either mount and hoist or deck mounts would be appropriate, depending on whether you want the guns to have an integral ammo hoist or to get their ammo from deck lockers.

I'd expect a 109mm gun to be a quick-firing weapon, but I might be wrong. The ammunition load seems a bit low for me, given a rate of fire that's at least 10 rpm and quite possibly more than that.

Given the weather that the Nords have to deal with, is a 0.81 seaworthiness a good idea?

Go with geared drive instead of the direct drive, direct drive is for ships before the geared turbine was invented.

Cross-sectional strength is too low, has to be at least 0.50. You could probably get away with making the hull a bit shallower, then lengthen, broaden and fine it a bit.

29 class, Nordmark Destroyers laid down 1929

Displacement:
1,552 t light; 1,609 t standard; 1,962 t normal; 2,245 t full load

Dimensions: Length overall / water x beam x draught
368.53 ft / 365.00 ft x 28.00 ft x 14.00 ft (normal load)
112.33 m / 111.25 m x 8.53 m x 4.27 m

Armament:
4 - 4.30" / 109 mm guns in single mounts, 39.75lbs / 18.03kg shells, 1929 Model
Quick firing guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
2 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1929 Model
Anti-aircraft guns in deck mounts
on side, all amidships
4 - 1.46" / 37.0 mm guns (2x2 guns), 1.55lbs / 0.70kg shells, 1929 Model
Breech loading guns in deck mounts
on side, evenly spread
2 - 1.90" / 48.3 mm guns in single mounts, 3.43lbs / 1.56kg shells, 1929 Model
Quick firing guns in deck mounts
on side, evenly spread
Weight of broadside 199 lbs / 90 kg
Shells per gun, main battery: 150
4 - 21.0" / 533.4 mm above water torpedoes

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

- Conning tower: 3.00" / 76 mm

Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 41,714 shp / 31,119 Kw = 33.00 kts
Range 7,150nm at 15.00 kts
Bunker at max displacement = 636 tons

Complement:
146 - 191

Cost:
£0.878 million / $3.513 million

Distribution of weights at normal displacement:
Armament: 25 tons, 1.3 %
Armour: 24 tons, 1.2 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 13 tons, 0.7 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 10 tons, 0.5 %
Machinery: 1,031 tons, 52.6 %
Hull, fittings & equipment: 452 tons, 23.0 %
Fuel, ammunition & stores: 411 tons, 20.9 %
Miscellaneous weights: 20 tons, 1.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
437 lbs / 198 Kg = 11.0 x 4.3 " / 109 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.43
Metacentric height 1.4 ft / 0.4 m
Roll period: 10.0 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: 0.480
Length to Beam Ratio: 13.04 : 1
'Natural speed' for length: 19.10 kts
Power going to wave formation at top speed: 65 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 20.00 ft / 6.10 m
- Forecastle (20 %): 12.42 ft / 3.79 m
- Mid (50 %): 12.42 ft / 3.79 m
- Quarterdeck (15 %): 12.42 ft / 3.79 m
- Stern: 12.42 ft / 3.79 m
- Average freeboard: 13.03 ft / 3.97 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 180.5 %
- Above water (accommodation/working, high = better): 79.1 %
Waterplane Area: 6,688 Square feet or 621 Square metres
Displacement factor (Displacement / loading): 70 %
Structure weight / hull surface area: 30 lbs/sq ft or 147 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.41
- Overall: 0.55
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped

29-1 to 9 built

Length to beam is now too high, can't exceed 12:1 and for rough sea boats might be better to be a bit lower than that (as HooMan will happily tell us).

Ditch the direct-drive, it would require separate turbines for different speeds instead of a transmission.

29 class, Nordmark Destroyers laid down 1929

Displacement:
1,557 t light; 1,614 t standard; 1,923 t normal; 2,170 t full load

Dimensions: Length overall / water x beam x draught
343.55 ft / 340.00 ft x 29.00 ft x 15.00 ft (normal load)
104.71 m / 103.63 m x 8.84 m x 4.57 m

Armament:
4 - 4.30" / 109 mm guns in single mounts, 39.75lbs / 18.03kg shells, 1929 Model
Breech loading guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
2 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1929 Model
Anti-aircraft guns in deck mounts
on side, all amidships
4 - 1.46" / 37.0 mm guns (2x2 guns), 1.55lbs / 0.70kg shells, 1929 Model
Breech loading guns in deck mounts
on side, evenly spread
2 - 1.90" / 48.3 mm guns in single mounts, 3.43lbs / 1.56kg shells, 1929 Model
Quick firing guns in deck mounts
on side, evenly spread
Weight of broadside 199 lbs / 90 kg
Shells per gun, main battery: 150
4 - 21.0" / 533.4 mm above water torpedoes

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

- Conning tower: 3.00" / 76 mm

Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 43,091 shp / 32,146 Kw = 33.00 kts
Range 7,400nm at 14.00 kts
Bunker at max displacement = 556 tons

Complement:
144 - 188

Cost:
£0.878 million / $3.514 million

Distribution of weights at normal displacement:
Armament: 25 tons, 1.3 %
Armour: 23 tons, 1.2 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 13 tons, 0.7 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 10 tons, 0.5 %
Machinery: 1,030 tons, 53.6 %
Hull, fittings & equipment: 459 tons, 23.9 %
Fuel, ammunition & stores: 366 tons, 19.0 %
Miscellaneous weights: 20 tons, 1.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
419 lbs / 190 Kg = 10.5 x 4.3 " / 109 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.40
Metacentric height 1.4 ft / 0.4 m
Roll period: 10.3 seconds
Steadiness - As gun platform (Average = 50 %): 47 %
- Recoil effect (Restricted arc if above 1.00): 0.40
Seaboat quality (Average = 1.00): 0.90

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.455
Length to Beam Ratio: 11.72 : 1
'Natural speed' for length: 18.44 kts
Power going to wave formation at top speed: 67 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 20.13 ft / 6.14 m
- Forecastle (20 %): 12.81 ft / 3.90 m
- Mid (50 %): 12.81 ft / 3.90 m
- Quarterdeck (15 %): 12.81 ft / 3.90 m
- Stern: 12.81 ft / 3.90 m
- Average freeboard: 13.40 ft / 4.08 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 184.0 %
- Above water (accommodation/working, high = better): 77.1 %
Waterplane Area: 6,315 Square feet or 587 Square metres
Displacement factor (Displacement / loading): 67 %
Structure weight / hull surface area: 32 lbs/sq ft or 156 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.83
- Overall: 0.57
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

29-1 to 9 built

I think you really need more training with SpringSharp. Your ships still feature incredibly if not entirely unrealistic high l:b ratios (even though 11,7:1 is allowed by our Gentlemen´s Rules). However, you do not even get the benefits from your design practice.

To give you an example that you really don´t need such high l:b ratios I have added an example below: a category b destroyer design build for the RSAN. On a similar displacement this DD is far superior to your own design - and has a l:b ratio of less than 10:1.


Kymothoe , laid down 1927

Displacement:
1.613 t light; 1.678 t standard (1.600 t officially); 1.910 t normal; 2.096 t full load

Dimensions: Length overall / water x beam x draught
373,55 ft / 359,25 ft x 36,09 ft x 13,22 ft (normal load)
113,86 m / 109,50 m x 11,00 m x 4,03 m

Armament:
5 - 5,00" / 127 mm guns in single mounts, 62,50lbs / 28,35kg shells, 1927 Model
Breech loading guns in deck mounts
on centreline ends, majority forward, 2 raised mounts - superfiring
4 - 1,57" / 40,0 mm guns (2x2 guns), 1,95lbs / 0,88kg shells, 1927 Model
Anti-aircraft guns in deck mounts
on side, all amidships
4 - 0,79" / 20,0 mm guns (2x2 guns), 0,24lbs / 0,11kg shells, 1927 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 321 lbs / 146 kg
Shells per gun, main battery: 150
6 - 21,0" / 533 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0,79" / 20 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, 43.325 shp / 32.321 Kw = 35,00 kts
Range 5.000nm at 15,00 kts
Bunker at max displacement = 418 tons

Complement:
143 - 187

Cost:
£0,847 million / $3,390 million

Distribution of weights at normal displacement:
Armament: 40 tons, 2,1%
Armour: 11 tons, 0,6%
- Belts: 0 tons, 0,0%
- Torpedo bulkhead: 0 tons, 0,0%
- Armament: 11 tons, 0,6%
- Armour Deck: 0 tons, 0,0%
- Conning Tower: 0 tons, 0,0%
Machinery: 1.021 tons, 53,4%
Hull, fittings & equipment: 541 tons, 28,3%
Fuel, ammunition & stores: 298 tons, 15,6%
Miscellaneous weights: 0 tons, 0,0%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
489 lbs / 222 Kg = 7,8 x 5,0 " / 127 mm shells or 0,3 torpedoes
Stability (Unstable if below 1.00): 1,42
Metacentric height 2,0 ft / 0,6 m
Roll period: 10,7 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0,21
Seaboat quality (Average = 1.00): 1,00

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0,390
Length to Beam Ratio: 9,95 : 1
'Natural speed' for length: 21,97 kts
Power going to wave formation at top speed: 68 %
Trim (Max stability = 0, Max steadiness = 100): 70
Bow angle (Positive = bow angles forward): 30,00 degrees
Stern overhang: 0,00 ft / 0,00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 24,77 ft / 7,55 m
- Forecastle (30%): 18,54 ft / 5,65 m
- Mid (50%): 18,54 ft / 5,65 m (10,76 ft / 3,28 m aft of break)
- Quarterdeck (15%): 10,76 ft / 3,28 m
- Stern: 10,76 ft / 3,28 m
- Average freeboard: 15,40 ft / 4,69 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 188,5%
- Above water (accommodation/working, high = better): 101,6%
Waterplane Area: 8.238 Square feet or 765 Square metres
Displacement factor (Displacement / loading): 62%
Structure weight / hull surface area: 34 lbs/sq ft or 166 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,50
- Longitudinal: 2,00
- Overall: 0,57
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform

29 class, Nordmark Destroyers laid down 1929

Displacement:
1,543 t light; 1,609 t standard; 1,820 t normal; 1,989 t full load

Dimensions: Length overall / water x beam x draught
353.53 ft / 350.00 ft x 35.00 ft x 13.00 ft (normal load)
107.75 m / 106.68 m x 10.67 m x 3.96 m

Armament:
4 - 4.30" / 109 mm guns in single mounts, 39.75lbs / 18.03kg shells, 1929 Model
Quick firing guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
2 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1929 Model
Anti-aircraft guns in deck mounts
on side, all amidships
4 - 1.46" / 37.0 mm guns (2x2 guns), 1.55lbs / 0.70kg shells, 1929 Model
Breech loading guns in deck mounts
on side, evenly spread
2 - 1.90" / 48.3 mm guns in single mounts, 3.43lbs / 1.56kg shells, 1929 Model
Quick firing guns in deck mounts
on side, evenly spread
Weight of broadside 199 lbs / 90 kg
Shells per gun, main battery: 250
6 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm 1.00" / 25 mm -
2nd: 1.00" / 25 mm - -
3rd: 1.00" / 25 mm - -

- Conning tower: 3.00" / 76 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 38,044 shp / 28,381 Kw = 34.00 kts
Range 4,760nm at 15.00 kts
Bunker at max displacement = 379 tons

Complement:
139 - 181

Cost:
£0.823 million / $3.293 million

Distribution of weights at normal displacement:
Armament: 25 tons, 1.4 %
Armour: 27 tons, 1.5 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 17 tons, 0.9 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 10 tons, 0.5 %
Machinery: 935 tons, 51.4 %
Hull, fittings & equipment: 536 tons, 29.5 %
Fuel, ammunition & stores: 277 tons, 15.2 %
Miscellaneous weights: 20 tons, 1.1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
539 lbs / 244 Kg = 13.6 x 4.3 " / 109 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.40
Metacentric height 1.9 ft / 0.6 m
Roll period: 10.8 seconds
Steadiness - As gun platform (Average = 50 %): 53 %
- Recoil effect (Restricted arc if above 1.00): 0.26
Seaboat quality (Average = 1.00): 1.05

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.400
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 21.64 kts
Power going to wave formation at top speed: 68 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 20.00 ft / 6.10 m
- Forecastle (30 %): 18.00 ft / 5.49 m
- Mid (50 %): 18.00 ft / 5.49 m (13.00 ft / 3.96 m aft of break)
- Quarterdeck (15 %): 13.00 ft / 3.96 m
- Stern: 13.00 ft / 3.96 m
- Average freeboard: 15.74 ft / 4.80 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 178.4 %
- Above water (accommodation/working, high = better): 105.3 %
Waterplane Area: 7,826 Square feet or 727 Square metres
Displacement factor (Displacement / loading): 70 %
Structure weight / hull surface area: 34 lbs/sq ft or 166 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.49
- Longitudinal: 2.21
- Overall: 0.56
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate

29-1 to 9 built

Your designs cross-sectional hs has to be increased to 0,5 - otherwise your ships hull has to be rated as weak.

29 class, Nordmark Destroyers laid down 1929

Displacement:
1,555 t light; 1,609 t standard; 1,820 t normal; 1,989 t full load

Dimensions: Length overall / water x beam x draught
353.53 ft / 350.00 ft x 35.00 ft x 13.00 ft (normal load)
107.75 m / 106.68 m x 10.67 m x 3.96 m

Armament:
4 - 4.30" / 109 mm guns in single mounts, 39.75lbs / 18.03kg shells, 1929 Model
Quick firing guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
2 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1929 Model
Anti-aircraft guns in deck mounts
on side, all amidships
4 - 1.46" / 37.0 mm guns (2x2 guns), 1.55lbs / 0.70kg shells, 1929 Model
Breech loading guns in deck mounts
on side, evenly spread
2 - 1.90" / 48.3 mm guns in single mounts, 3.43lbs / 1.56kg shells, 1929 Model
Quick firing guns in deck mounts
on side, evenly spread
Weight of broadside 199 lbs / 90 kg
Shells per gun, main battery: 150
6 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm 1.00" / 25 mm -
2nd: 1.00" / 25 mm - -
3rd: 1.00" / 25 mm - -

- Conning tower: 3.00" / 76 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 38,044 shp / 28,381 Kw = 34.00 kts
Range 4,760nm at 15.00 kts
Bunker at max displacement = 379 tons

Complement:
139 - 181

Cost:
£0.825 million / $3.300 million

Distribution of weights at normal displacement:
Armament: 25 tons, 1.4 %
Armour: 27 tons, 1.5 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 17 tons, 0.9 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 10 tons, 0.5 %
Machinery: 935 tons, 51.4 %
Hull, fittings & equipment: 548 tons, 30.1 %
Fuel, ammunition & stores: 265 tons, 14.6 %
Miscellaneous weights: 20 tons, 1.1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
553 lbs / 251 Kg = 13.9 x 4.3 " / 109 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.39
Metacentric height 1.8 ft / 0.6 m
Roll period: 10.9 seconds
Steadiness - As gun platform (Average = 50 %): 52 %
- Recoil effect (Restricted arc if above 1.00): 0.26
Seaboat quality (Average = 1.00): 1.05

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.400
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 21.64 kts
Power going to wave formation at top speed: 68 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 20.00 ft / 6.10 m
- Forecastle (30 %): 18.00 ft / 5.49 m
- Mid (50 %): 18.00 ft / 5.49 m (13.00 ft / 3.96 m aft of break)
- Quarterdeck (15 %): 13.00 ft / 3.96 m
- Stern: 13.00 ft / 3.96 m
- Average freeboard: 15.74 ft / 4.80 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 177.7 %
- Above water (accommodation/working, high = better): 105.3 %
Waterplane Area: 7,826 Square feet or 727 Square metres
Displacement factor (Displacement / loading): 70 %
Structure weight / hull surface area: 35 lbs/sq ft or 170 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 2.26
- Overall: 0.58
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate

29-1 to 9 built