WesWorld

Naval Contest

Poland is locking to porches 2 Destroyer hulls.
Any ship yard willing too sell to destroyers is welcome to enter the competition for the contract.

the contract asks The manufactur to supply the engines and the hull of a ship.

Polish naval ministry wishes the the competitors fovard a destroyer plans of the folowing carecteristics:

-speed over 33 knots
-Armament 110mm Dual-porpose cannons and 40mm Anti-aircraft guns
-Torpedo armament 600mm torpedo tubbes
-displacement under over 1000t under 2000t
-range around 3,000nm at 15.00 kts

All other charcteristic are the Manufacture preferences.
All offers are welcome.The payment will be in form of warships material full displacment plus 50% minus the armament weight.


OCC:Im basicly asking you guys to sim a destroyer for me
with the weapons that I use the 110mm DP,40mm AA and 600m TT.I will buy it and pay in desplacement full minus the Guns.So you will have 50% plus tons of warship material from the deal.

So any one interested?

Atlantis submits the following 2 designs as its initial bid. The first is a small fast design with a modest main armament and good AA outfit.

The design offers some room for future upgrades. The second is a leader type with considerably more firepower than the first and improved range over that specified.

Polish design A1, Atlantis Destroyer laid down 1929

Polish design, Atlantis Destroyer laid down 1929

Displacement:
1,516 t light; 1,591 t standard; 1,723 t normal; 1,828 t full load

Dimensions: Length overall / water x beam x draught
366.43 ft / 360.00 ft x 35.00 ft x 11.00 ft (normal load)
111.69 m / 109.73 m x 10.67 m x 3.35 m

Armament:
6 - 4.50" / 114 mm guns (3x2 guns), 45.56lbs / 20.67kg shells, 1929 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, majority forward, 1 raised mount - superfiring
4 - 1.57" / 39.9 mm guns in single mounts, 1.93lbs / 0.88kg shells, 1929 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
8 - 0.79" / 20.1 mm guns (6 mounts), 0.25lbs / 0.11kg shells, 1929 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1929 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 283 lbs / 129 kg
Shells per gun, main battery: 250
6 - 23.6" / 600 mm above water torpedoes

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 41,937 shp / 31,285 Kw = 35.00 kts
Range 3,000nm at 15.00 kts
Bunker at max displacement = 237 tons

Complement:
133 - 173

Cost:
£0.843 million / $3.371 million

Distribution of weights at normal displacement:
Armament: 35 tons, 2.1 %
Machinery: 914 tons, 53.0 %
Hull, fittings & equipment: 517 tons, 30.0 %
Fuel, ammunition & stores: 207 tons, 12.0 %
Miscellaneous weights: 50 tons, 2.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
379 lbs / 172 Kg = 8.3 x 4.5 " / 114 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.19
Metacentric height 1.4 ft / 0.4 m
Roll period: 12.3 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.40
Seaboat quality (Average = 1.00): 0.82

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.435
Length to Beam Ratio: 10.29 : 1
'Natural speed' for length: 21.78 kts
Power going to wave formation at top speed: 69 %
Trim (Max stability = 0, Max steadiness = 100): 73
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 24.00 ft / 7.32 m
- Forecastle (30 %): 20.20 ft / 6.16 m
- Mid (40 %): 20.20 ft / 6.16 m (10.20 ft / 3.11 m aft of break)
- Quarterdeck (10 %): 10.20 ft / 3.11 m
- Stern: 10.20 ft / 3.11 m
- Average freeboard: 14.66 ft / 4.47 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 191.0 %
- Above water (accommodation/working, high = better): 82.0 %
Waterplane Area: 8,247 Square feet or 766 Square metres
Displacement factor (Displacement / loading): 59 %
Structure weight / hull surface area: 34 lbs/sq ft or 168 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.56
- Overall: 0.56
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


------------------------------------------------------------------------

Polish destroyer design A2, Atlantis Destroyer laid down 1930

Displacement:
1,839 t light; 1,947 t standard; 2,168 t normal; 2,345 t full load

Dimensions: Length overall / water x beam x draught
396.66 ft / 385.00 ft x 36.00 ft x 12.50 ft (normal load)
120.90 m / 117.35 m x 10.97 m x 3.81 m

Armament:
8 - 4.50" / 114 mm guns (3 mounts), 45.56lbs / 20.67kg shells, 1930 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, majority forward, 2 raised mounts - superfiring
2 - 1.57" / 39.9 mm guns (1x2 guns), 1.93lbs / 0.88kg shells, 1930 Model
Anti-aircraft guns in deck mount
on centreline aft
4 - 1.57" / 39.9 mm guns (2x2 guns), 1.93lbs / 0.88kg shells, 1930 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
8 - 0.78" / 19.8 mm guns (4x2 guns), 0.24lbs / 0.11kg shells, 1930 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
4 - 0.50" / 12.7 mm guns (2x2 guns), 0.06lbs / 0.03kg shells, 1930 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 378 lbs / 172 kg
Shells per gun, main battery: 300
8 - 23.6" / 600.0001 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm 0.79" / 20 mm -

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 44,000 shp / 32,824 Kw = 34.48 kts
Range 4,500nm at 15.00 kts
Bunker at max displacement = 398 tons

Complement:
158 - 206

Cost:
£1.074 million / $4.297 million

Distribution of weights at normal displacement:
Armament: 47 tons, 2.2 %
Armour: 21 tons, 1.0 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 21 tons, 1.0 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 1,092 tons, 50.4 %
Hull, fittings & equipment: 659 tons, 30.4 %
Fuel, ammunition & stores: 329 tons, 15.2 %
Miscellaneous weights: 20 tons, 0.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
561 lbs / 254 Kg = 12.3 x 4.5 " / 114 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.23
Metacentric height 1.6 ft / 0.5 m
Roll period: 12.1 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.55
Seaboat quality (Average = 1.00): 0.93

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.438
Length to Beam Ratio: 10.69 : 1
'Natural speed' for length: 22.45 kts
Power going to wave formation at top speed: 67 %
Trim (Max stability = 0, Max steadiness = 100): 65
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: 25.00 ft / 7.62 m
- Forecastle (20 %): 20.50 ft / 6.25 m
- Mid (45 %): 20.50 ft / 6.25 m (10.50 ft / 3.20 m aft of break)
- Quarterdeck (12 %): 10.50 ft / 3.20 m
- Stern: 10.50 ft / 3.20 m
- Average freeboard: 15.36 ft / 4.68 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 181.8 %
- Above water (accommodation/working, high = better): 77.2 %
Waterplane Area: 9,094 Square feet or 845 Square metres
Displacement factor (Displacement / loading): 70 %
Structure weight / hull surface area: 38 lbs/sq ft or 187 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.51
- Longitudinal: 1.57
- 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

Chile offers the following design.
On a side note, Chile can produce the 110mm guns itself as they also use that particular Nordmark gun.

Zero

Polish Destroyer laid down 1929

Displacement:
1,720 t light; 1,797 t standard; 1,950 t normal; 2,064 t full load

Dimensions: Length overall / water x beam x draught
353.67 ft / 345.00 ft x 34.00 ft x 12.00 ft (normal load)
107.80 m / 105.16 m x 10.36 m x 3.66 m

Armament:
8 - 4.33" / 110 mm guns (4x2 guns), 40.61lbs / 18.42kg shells, 1929 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
8 - 1.57" / 40.0 mm guns (4x2 guns), 1.95lbs / 0.89kg shells, 1929 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1929 Model
Machine guns in deck mounts
on side, all amidships, all raised mounts - superfiring
Weight of broadside 341 lbs / 155 kg
Shells per gun, main battery: 200
4 - 23.6" / 600 mm above water torpedoes

Machinery:
Oil fired boilers, steam turbines,
Direct drive, 3 shafts, 45,000 shp / 33,570 Kw = 33.01 kts
Range 3,000nm at 15.00 kts (Bunkerage = 275 tons)

Complement:
146 - 190

Cost:
£0.961 million / $3.844 million

Distribution of weights at normal displacement:
Armament: 43 tons, 2.2 %
Machinery: 1,031 tons, 52.9 %
Hull, fittings & equipment: 596 tons, 30.6 %
Fuel, ammunition & stores: 230 tons, 11.8 %
Miscellaneous weights: 50 tons, 2.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
501 lbs / 227 Kg = 12.3 x 4.3 " / 110 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.23
Metacentric height 1.5 ft / 0.4 m
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.42
Seaboat quality (Average = 1.00): 1.03

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.485
Length to Beam Ratio: 10.15 : 1
'Natural speed' for length: 18.57 kts
Power going to wave formation at top speed: 70 %
Trim (Max stability = 0, Max steadiness = 100): 68
Bow angle (Positive = bow angles forward): 18.44 degrees
Stern overhang: 2.00 ft / 0.61 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 20.00 ft / 6.10 m
- Forecastle (20 %): 20.00 ft / 6.10 m
- Mid (50 %): 14.00 ft / 4.27 m
- Quarterdeck (15 %): 14.00 ft / 4.27 m
- Stern: 14.00 ft / 4.27 m
- Average freeboard: 16.10 ft / 4.91 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 190.5 %
- Above water (accommodation/working, high = better): 104.2 %
Waterplane Area: 7,391 Square feet or 687 Square metres
Displacement factor (Displacement / loading): 62 %
Structure weight / hull surface area: 37 lbs/sq ft or 182 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.54
- Longitudinal: 2.59
- Overall: 0.63
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

The Republic of France offers her latest destroyer design, 9 of which are presently under construction for the Marine Nationale. Her gun and torpedo fit can be modified to the Polish specification, and she exceeds the Polish specification for speed and range. She has 30 tons available for depth charges and other gear. And being designed for Atlantic service, her seakeeping would make her very popular with Polish crews, who would be protected from the Baltic Sea's icy winter waters:

Le Terrible class, French destroyer laid down 1929

Displacement:
1,333 t light; 1,379 t standard; 1,554 t normal; 1,694 t full load

Dimensions: Length overall / water x beam x draught
375.67 ft / 360.89 ft x 32.81 ft x 11.48 ft (normal load)
114.50 m / 110.00 m x 10.00 m x 3.50 m

Armament:
3 - 4.72" / 120 mm guns in single mounts, 52.72lbs / 23.92kg shells, 1929 Model
Breech loading guns in deck mounts
on centreline ends, majority forward, 1 raised mount
4 - 1.57" / 40.0 mm guns (1x4 guns), 1.95lbs / 0.89kg shells, 1929 Model
Breech loading guns in a deck mount with hoist
on centreline aft, all raised guns - superfiring
4 - 1.57" / 40.0 mm guns (2x2 guns), 1.95lbs / 0.89kg shells, 1929 Model
Breech loading guns in deck mounts with hoists
on side, evenly spread
4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1929 Model
Breech loading guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 174 lbs / 79 kg
Shells per gun, main battery: 150
8 - 21.7" / 550 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.20" / 5 mm -
2nd: 0.98" / 25 mm 0.20" / 5 mm -
3rd: 0.98" / 25 mm 0.20" / 5 mm -

- Conning tower: 1.18" / 30 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 35,857 shp / 26,750 Kw = 34.50 kts
Range 4,300nm at 15.00 kts
Bunker at max displacement = 315 tons

Complement:
123 - 160

Cost:
£0.714 million / $2.858 million

Distribution of weights at normal displacement:
Armament: 22 tons, 1.4 %
Armour: 11 tons, 0.7 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 7 tons, 0.5 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 3 tons, 0.2 %
Machinery: 812 tons, 52.3 %
Hull, fittings & equipment: 458 tons, 29.5 %
Fuel, ammunition & stores: 221 tons, 14.2 %
Miscellaneous weights: 30 tons, 1.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
434 lbs / 197 Kg = 8.2 x 4.7 " / 120 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.31
Metacentric height 1.5 ft / 0.5 m
Roll period: 11.2 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.20
Seaboat quality (Average = 1.00): 1.06

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.400
Length to Beam Ratio: 11.00 : 1
'Natural speed' for length: 21.80 kts
Power going to wave formation at top speed: 66 %
Trim (Max stability = 0, Max steadiness = 100): 66
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: 25.59 ft / 7.80 m
- Forecastle (20 %): 17.39 ft / 5.30 m
- Mid (50 %): 17.39 ft / 5.30 m (10.01 ft / 3.05 m aft of break)
- Quarterdeck (15 %): 10.01 ft / 3.05 m
- Stern: 11.48 ft / 3.50 m
- Average freeboard: 14.46 ft / 4.41 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 181.6 %
- Above water (accommodation/working, high = better): 79.3 %
Waterplane Area: 7,564 Square feet or 703 Square metres
Displacement factor (Displacement / loading): 64 %
Structure weight / hull surface area: 31 lbs/sq ft or 151 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.77
- Overall: 0.56
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform

What is the priority on the Polish destroyers in terms of weapons?

More Guns for surface actions?
More Guns for anti-air work?
More Torpedoes?
More space for mine warfare?

This might help us come up with an adiquate design.

The RSAN can either provide a version of the 1,600ts DD27-class (traded her original 127mm SP guns against 110mm DPs and added some misc weight) or the DL28-class of 2,000ts (traded her original 115mm SPs for 110mm DPs and added 15ts misc weight). All those hulls easily match the Polish specifications.

DD27-P, Polish Destroyer laid down 1927

Displacement:
1.614 t light; 1.678 t standard; 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 - 4,33" / 110 mm guns in single mounts, 40,61lbs / 18,42kg shells, 1927 Model
Dual purpose 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 212 lbs / 96 kg
Shells per gun, main battery: 210
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:
£0,817 million / $3,267 million

Distribution of weights at normal displacement:
Armament: 26 tons, 1,4%
Armour: 9 tons, 0,5%
- Belts: 0 tons, 0,0%
- Torpedo bulkhead: 0 tons, 0,0%
- Armament: 9 tons, 0,5%
- Armour Deck: 0 tons, 0,0%
- Conning Tower: 0 tons, 0,0%
Machinery: 1.042 tons, 54,5%
Hull, fittings & equipment: 527 tons, 27,6%
Fuel, ammunition & stores: 296 tons, 15,5%
Miscellaneous weights: 10 tons, 0,5%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
492 lbs / 223 Kg = 12,1 x 4,3 " / 110 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): 0,14
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): 187,6%
- Above water (accommodation/working, high = better): 101,6%
Waterplane Area: 8.238 Square feet or 765 Square metres
Displacement factor (Displacement / loading): 64%
Structure weight / hull surface area: 33 lbs/sq ft or 162 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,50
- Longitudinal: 1,95
- 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



DL28-2000-P, Polish Flotilla Leader laid down 1928

Displacement:
1.994 t light; 2.083 t standard; 2.422 t normal; 2.692 t full load

Dimensions: Length overall / water x beam x draught
426,78 ft / 410,11 ft x 39,37 ft x 13,12 ft (normal load)
130,08 m / 125,00 m x 12,00 m x 4,00 m

Armament:
8 - 4,33" / 110 mm guns (4x2 guns), 40,61lbs / 18,42kg shells, 1928 Model
Breech loading guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
10 - 1,57" / 40,0 mm guns (5x2 guns), 1,95lbs / 0,88kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
12 - 0,79" / 20,0 mm guns (8 mounts), 0,24lbs / 0,11kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 347 lbs / 158 kg
Shells per gun, main battery: 200
8 - 21,0" / 533 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0,79" / 20 mm 0,59" / 15 mm -
3rd: 0,59" / 15 mm - -
4th: 0,39" / 10 mm - -

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 45.576 shp / 34.000 Kw = 34,67 kts
Range 6.400nm at 15,00 kts
Bunker at max displacement = 609 tons

Complement:
172 - 224

Cost:
£1,059 million / $4,235 million

Distribution of weights at normal displacement:
Armament: 43 tons, 1,8%
Armour: 17 tons, 0,7%
- Belts: 0 tons, 0,0%
- Torpedo bulkhead: 0 tons, 0,0%
- Armament: 17 tons, 0,7%
- Armour Deck: 0 tons, 0,0%
- Conning Tower: 0 tons, 0,0%
Machinery: 1.222 tons, 50,4%
Hull, fittings & equipment: 677 tons, 28,0%
Fuel, ammunition & stores: 427 tons, 17,6%
Miscellaneous weights: 35 tons, 1,4%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
630 lbs / 286 Kg = 15,5 x 4,3 " / 110 mm shells or 0,3 torpedoes
Stability (Unstable if below 1.00): 1,31
Metacentric height 2,0 ft / 0,6 m
Roll period: 11,7 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0,35
Seaboat quality (Average = 1.00): 1,00

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0,400
Length to Beam Ratio: 10,42 : 1
'Natural speed' for length: 23,34 kts
Power going to wave formation at top speed: 64 %
Trim (Max stability = 0, Max steadiness = 100): 70
Bow angle (Positive = bow angles forward): 35,00 degrees
Stern overhang: 0,00 ft / 0,00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 23,82 ft / 7,26 m
- Forecastle (30%): 19,36 ft / 5,90 m
- Mid (45%): 19,36 ft / 5,90 m (11,48 ft / 3,50 m aft of break)
- Quarterdeck (15%): 11,48 ft / 3,50 m
- Stern: 11,48 ft / 3,50 m
- Average freeboard: 15,56 ft / 4,74 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 178,6%
- Above water (accommodation/working, high = better): 102,6%
Waterplane Area: 10.314 Square feet or 958 Square metres
Displacement factor (Displacement / loading): 75%
Structure weight / hull surface area: 37 lbs/sq ft or 180 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,50
- Longitudinal: 1,27
- Overall: 0,55
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

What are the costs of the SAE designs under a lay down date of 1929? Cost would certainly be a key factor for Polands decision making process.

They can have them for the original price....

Heh, with a 50% markup (minus armament weight) I suppose that wouldn't be to much of an issue afterall!

Poland is greatfull for all the offers
In the initial lock on the desings by the polish navy the foloving design were chosen.

Le Terrible class,
Zero class
DD27-P class

Quoted

Originally posted by Ithekro
What is the priority on the Polish destroyers in terms of weapons?

More Guns for surface actions?
More Guns for anti-air work?
More Torpedoes?
More space for mine warfare?

This might help us come up with an adiquate design.

Poland wishes the ship to have 6 to 8 600mm TT on the ship and average seaboat quality.
6 to 8 40mm AA and minimum 3 110mm DPs
Space for mine warfare is secondery as the navy is bilding a dediceted mine warfare ships.
It is better that the ship is not wet foward.

Quoted

Originally posted by thesmilingassassin
Polish design A1, Atlantis Destroyer laid down 1929

- Cross-sectional: 0.48

Isnt that in conflict with the desing rules.

Just noticed I forgot to change the TT caliber from 533mm to 600mm on the designs posted above. Not a problem, though, as this has little effect on the SS-file.

India will submit a design within the next twelve hours, if Poland can hold off that long...

The Indian Design Bureau's Export Division is pleased to present the following design for Poland's consideration.

The armament of the ship is to be three twin 11 cm DP turrets, to be supplied by Poland or its purchaser. Turrets are used in this case primarily for protection from weather. Deck mounts can be employed if desired. The light battery consists of three twin 4 cm AA mounts and a quadruple 1.5 cm gun. The latter can be replaced by a further twin 4 cm gun.

Torpedo armament is designed as two quadruple banks of 60 cm weapons on the centreline. Twenty tons of miscellaneous weight have been set aside for depth charges and future growth.

Conceptually, the ship's layout is:

11 - 4(s) - Bridge - Funnel - TT - Funnel - TT - 1.5(s) - Searchlight Platform - 11(s) - 11

The other two twin 4 cm mounts would be located on elevating gun tubs abreast the aft funnel.

The hull is to have a raised forecastle, the break being adjacent to the aft funnel.

The ship does have limited accommodation and working space (a "poor accommodation" warning) as a result of the weaponry carried. This was considered acceptable to the designers on account of the vessel's limited cruising radius, but can be alleviated with the reduction of the torpedo armament to six weapons from eight.

India could construct both units at the type one slipway at Trincomalee, laying down D1 on 1 September, launching her 15 January 1930, laying down the second unit on 1 February 1930, and launching her on 15 June 1930. Alternately, the second unit can be constructed in a drydock starting at any time after 1 September 1929.

****

P, laid down 1929

Length, 112.0 m x Beam, 11.2 m x Depth, 3.5 m
1771 tonnes normal displacement (1630 tonnes standard)

Main battery: 6 x 11.0-cm (3 x 2; 1 superfiring)
Secondary battery: 6 x 4.0-cm
AA battery: 4 x 1.5-cm

Weight of broadside: 116 kg

8 TT, 60.0 cm

Hull unarmored

Battery armor:
Main, 3.0 cm / secondary, 2.0 cm shields
AA, 2.0 cm shields

Maximum speed for 32020 shaft kw = 33.82 knots
Approximate cruising radius, 3000 nm / 15 knots

Typical complement: 136-177


Estimated cost, $3.429 million (£857,000)

Remarks:

Caution: Hull structure is subject to strain in open-sea
conditions.

Superfiring turret is aft.

Ship has slow, easy roll; a good, steady gun platform.

Magazines and engineering spaces are cramped, with poor
watertight subdivision.

Cramped ship; poor crew accommodation, limited working space.


Distribution of weights:
Percent
normal
displacement:

Armament ......................... 32 tonnes = 2 pct
Armor, total ..................... 46 tonnes = 3 pct

Armament 46 tonnes = 3 pct

Machinery ........................ 946 tonnes = 53 pct
Hull and fittings; equipment ..... 529 tonnes = 30 pct
Fuel, ammunition, stores ......... 198 tonnes = 11 pct
Miscellaneous weights ............ 20 tonnes = 1 pct
-----
1771 tonnes = 100 pct

Estimated metacentric height, 0.5 m

Displacement summary:

Light ship: 1573 tonnes
Standard displacement: 1630 tonnes
Normal service: 1771 tonnes
Full load: 1876 tonnes

Loading submergence 684 tonnes/metre

+++++++++++++++++++++++++


Estimated overall survivability and seakeeping ability:

Relative margin of stability: 1.17

Shellfire needed to sink: 188 kg = 10.2 x 11.0-cm shells
(Approximates weight of penetrating
shell hits needed to sink ship,
not counting critical hits)

Torpedoes needed to sink: 0.3
(Approximates number of 'typical'
torpedo hits needed to sink ship)

Relative steadiness as gun platform, 72 percent
(50 percent is 'average')

Relative rocking effect from firing to beam, 0.42

Relative quality as a seaboat: 1.02

+++++++++++++++++++++++++


Hull form characteristics:

Block coefficient: 0.40
Sharpness coefficient: 0.30
Hull speed coefficient 'M' = 9.28
'Natural speed' for length = 19.2 knots
Power going to wave formation
at top speed: 66 percent


Estimated hull characteristics and strength:

Relative underwater volume absorbed by
magazines and engineering spaces: 187 percent

Relative accommodation and working space: 73 percent


Displacement factor: 60 percent
(Displacement relative to loading factors)


Relative cross-sectional hull strength: 0.50
(Structure weight per square
metre of hull surface: 186 kg)

Relative longitudinal hull strength: 1.14
(for 4.70 m average freeboard;
freeboard adjustment +1.43 m)

Relative composite hull strength: 0.54

+++++++++++++++++++++++++


[Machine-readable parameters: Spring Style v. 1.2.1]

367.36 x 36.74 x 11.48; 15.42 -- Dimensions
0.40 -- Block coefficient
1929 -- Year laid down
33.82 / 3000 / 15.00; Oil-fired turbine or equivalent -- Speed / radius / cruise
20 tons -- Miscellaneous weights
++++++++++
6 x 4.33; 3; 1 -- Main battery; turrets; superfiring
Superfiring turret aft only
:
6 x 1.57; 0 -- Secondary battery; turrets
Gun-shields
:
4 x 0.59 -- Tertiary (QF/AA) battery
Gun-shields
:
0 -- No fourth (light) battery
8 / 0 / 23.62 -- TT / submerged / size
++++++++++
0.00 -- No belt armor
0.00 / 0.00 -- Deck / CT
1.18 / 0.79 / 0.79 / 0.00 -- Battery armor


(Note: For portability, values are stored in Anglo-American units)


+++++++++++++++++++++++++++++++++++++++++++++++++++++++

The MdF Design Office submits a preliminary design for a ship based on our recent "Cerceta" type.

Detailed design will follow later, if our submission is "short-listed".


DD30, laid down 1930

Length, 326 ft x Beam, 31.5 ft x Depth, 12.8 ft
1464 tons normal displacement (1322 tons standard)

Main battery: 6 x 4.33-inch / 110mm (3x2 deck mounts, Beta superfiring)
Secondary battery: 4 x 1.57-inch / 40mm (1x4 in Psi position)
AA battery: 8 x 0.54-inch / 13.7mm (one "buzzsaw" on each beam)

Weight of broadside: 252 lbs

6 TT, 0.6" (submerged)

Hull unarmored

Battery armor:
Main, 1.6" shields / secondary, 0.8" shields
AA, 0.5" shields

Maximum speed for 40014 shp = 33.76 knots
Approximate cruising radius, 3300 nm / 15 kts

Typical complement: 118-154


Estimated cost, $3.020 million (£755,000)

Remarks:

Caution: Hull structure is subject to strain in open-sea
conditions.

Ship has slow, easy roll; a good, steady gun platform.

Magazines and engineering spaces are cramped, with poor
watertight subdivision.

Roomy upper decks; superior accommodation and working space.


Distribution of weights:
Percent
normal
displacement:

Armament ......................... 31 tons = 2 pct
Armor, total ..................... 15 tons = 1 pct

Armament 15 tons = 1 pct

Machinery ........................ 783 tons = 53 pct
Hull and fittings; equipment ..... 418 tons = 29 pct
Fuel, ammunition, stores ......... 192 tons = 13 pct
Miscellaneous weights ............ 25 tons = 2 pct
-----
1464 tons = 100 pct

Estimated metacentric height, 1.2 ft

Displacement summary:

Light ship: 1272 tons
Standard displacement: 1322 tons
Normal service: 1464 tons
Full load: 1571 tons

Loading submergence 156 tons/foot

+++++++++++++++++++++++++


Estimated overall survivability and seakeeping ability:

Relative margin of stability: 1.20

Shellfire needed to sink: 319 lbs = 7.9 x 4.3-inch shells
(Approximates weight of penetrating
shell hits needed to sink ship,
not counting critical hits)

Torpedoes needed to sink: 0.2
(Approximates number of 'typical'
torpedo hits needed to sink ship)

Relative steadiness as gun platform, 71 percent
(50 percent is 'average')

Relative rocking effect from firing to beam, 0.33

Relative quality as a seaboat: 1.08

+++++++++++++++++++++++++


Hull form characteristics:

Block coefficient: 0.39
Sharpness coefficient: 0.29
Hull speed coefficient 'M' = 8.77
'Natural speed' for length = 18.0 knots
Power going to wave formation
at top speed: 68 percent


Estimated hull characteristics and strength:

Relative underwater volume absorbed by
magazines and engineering spaces: 191 percent

Relative accommodation and working space: 132 percent


Displacement factor: 54 percent
(Displacement relative to loading factors)


Relative cross-sectional hull strength: 0.50
(Structure weight per square
foot of hull surface: 36 lbs)

Relative longitudinal hull strength: 1.61
(for 15.0 ft average freeboard;
freeboard adjustment +4.7 ft)

Relative composite hull strength: 0.56

DD30, laid down 1930

Length, 326 ft x Beam, 31.5 ft x Depth, 12.8 ft
1464 tons normal displacement (1322 tons standard)

Main battery: 6 x 4.33-inch / 110mm (3x2 deck mounts with Beta superfiring)
Secondary battery: 4 x 1.57-inch / 40mm (1x4 in Psi position, superfiring the aft twin 110)
AA battery: 8 x 0.54-inch / 13.7mm (one Buzzsaw on each beam)

Weight of broadside: 252 lbs

6 TT, 600mm

Hull unarmored

Battery armor:
Main, 40mm shields / secondary, 20mm shields
AA, 15mm shields

Maximum speed for 40014 shp = 33.76 knots
Approximate cruising radius, 3300 nm / 15 kts

Typical complement: 118-154


Estimated cost, $3.020 million (£755,000)

Remarks:

Caution: Hull structure is subject to strain in open-sea
conditions.

Ship has slow, easy roll; a good, steady gun platform.

Magazines and engineering spaces are cramped, with poor
watertight subdivision.


Distribution of weights:
Percent
normal
displacement:

Armament ......................... 31 tons = 2 pct
Armor, total ..................... 15 tons = 1 pct

Armament 15 tons = 1 pct

Machinery ........................ 783 tons = 53 pct
Hull and fittings; equipment ..... 418 tons = 29 pct
Fuel, ammunition, stores ......... 192 tons = 13 pct
Miscellaneous weights ............ 25 tons = 2 pct
-----
1464 tons = 100 pct

Estimated metacentric height, 1.2 ft

Displacement summary:

Light ship: 1272 tons
Standard displacement: 1322 tons
Normal service: 1464 tons
Full load: 1571 tons

Loading submergence 156 tons/foot

+++++++++++++++++++++++++


Estimated overall survivability and seakeeping ability:

Relative margin of stability: 1.19

Shellfire needed to sink: 318 lbs = 7.8 x 4.3-inch shells
(Approximates weight of penetrating
shell hits needed to sink ship,
not counting critical hits)

Torpedoes needed to sink: 0.2
(Approximates number of 'typical'
torpedo hits needed to sink ship)

Relative steadiness as gun platform, 72 percent
(50 percent is 'average')

Relative rocking effect from firing to beam, 0.34

Relative quality as a seaboat: 1.08

+++++++++++++++++++++++++


Hull form characteristics:

Block coefficient: 0.39
Sharpness coefficient: 0.29
Hull speed coefficient 'M' = 8.77
'Natural speed' for length = 18.0 knots
Power going to wave formation
at top speed: 68 percent


Estimated hull characteristics and strength:

Relative underwater volume absorbed by
magazines and engineering spaces: 191 percent

Relative accommodation and working space: 95 percent


Displacement factor: 54 percent
(Displacement relative to loading factors)


Relative cross-sectional hull strength: 0.50
(Structure weight per square
foot of hull surface: 36 lbs)

Relative longitudinal hull strength: 1.61
(for 15.0 ft average freeboard;
freeboard adjustment +4.7 ft)

Relative composite hull strength: 0.56

+++++++++++++++++++++++++


[Machine-readable parameters: Spring Style v. 1.2.1]

325.79 x 31.50 x 12.80; 15.00 -- Dimensions
0.39 -- Block coefficient
1930 -- Year laid down
33.76 / 3300 / 15.00; Oil-fired turbine or equivalent -- Speed / radius / cruise
25 tons -- Miscellaneous weights
++++++++++
6 x 4.33; 0 -- Main battery; turrets
Central positioning of guns
Gun-shields
:
4 x 1.57; 0 -- Secondary battery; turrets
Gun-shields
:
8 x 0.54 -- Tertiary (QF/AA) battery
Gun-shields
:
0 -- No fourth (light) battery
6 / 0 / 23.62 -- TT / submerged / size
++++++++++
0.00 -- No belt armor
0.00 / 0.00 -- Deck / CT
1.57 / 0.79 / 0.54 / 0.00 -- Battery armor


+++++++++++++++++++++++++++++++++++++++++++++++++++++++

To comply with the request for 6-8 600mm torpedo tubes, the Capitan Zero design has been modified to suite that and has an increased freeboard at the bow so the vessel will not be wet.

Zero (Design B)

Polish Destroyer laid down 1929

Displacement:
1,720 t light; 1,797 t standard; 1,950 t normal; 2,064 t full load

Dimensions: Length overall / water x beam x draught
355.00 ft / 345.00 ft x 34.00 ft x 12.00 ft (normal load)
108.20 m / 105.16 m x 10.36 m x 3.66 m

Armament:
8 - 4.33" / 110 mm guns (4x2 guns), 40.61lbs / 18.42kg shells, 1929 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
8 - 1.57" / 40.0 mm guns (4x2 guns), 1.95lbs / 0.88kg shells, 1929 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1929 Model
Machine guns in deck mounts
on side, all amidships, all raised mounts - superfiring
Weight of broadside 341 lbs / 154 kg
Shells per gun, main battery: 200
6 - 23.6" / 600 mm above water torpedoes

Machinery:
Oil fired boilers, steam turbines,
Direct drive, 3 shafts, 45,000 shp / 33,570 Kw = 33.01 kts
Range 3,000nm at 15.00 kts (Bunkerage = 275 tons)

Complement:
146 - 190

Cost:
£0.961 million / $3.844 million

Distribution of weights at normal displacement:
Armament: 43 tons, 2.2 %
Machinery: 1,031 tons, 52.9 %
Hull, fittings & equipment: 596 tons, 30.6 %
Fuel, ammunition & stores: 230 tons, 11.8 %
Miscellaneous weights: 50 tons, 2.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
494 lbs / 224 Kg = 12.2 x 4.3 " / 110 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.24
Metacentric height 1.5 ft / 0.4 m
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.42
Seaboat quality (Average = 1.00): 1.09

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.485
Length to Beam Ratio: 10.15 : 1
'Natural speed' for length: 18.57 kts
Power going to wave formation at top speed: 70 %
Trim (Max stability = 0, Max steadiness = 100): 64
Bow angle (Positive = bow angles forward): 17.10 degrees
Stern overhang: 2.00 ft / 0.61 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 26.00 ft / 7.92 m
- Forecastle (20 %): 20.00 ft / 6.10 m
- Mid (50 %): 14.00 ft / 4.27 m
- Quarterdeck (15 %): 14.00 ft / 4.27 m
- Stern: 14.00 ft / 4.27 m
- Average freeboard: 16.58 ft / 5.05 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 190.5 %
- Above water (accommodation/working, high = better): 82.2 %
Waterplane Area: 7,391 Square feet or 687 Square metres
Displacement factor (Displacement / loading): 62 %
Structure weight / hull surface area: 36 lbs/sq ft or 177 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.52
- Longitudinal: 2.80
- Overall: 0.62
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform

Australias proposal. Customized version of Aclarity class DDs

Aclarity, Poland Destroyer laid down 1930

Displacement:
1,545 t light; 1,631 t standard; 1,895 t normal; 2,106 t full load

Dimensions: Length overall / water x beam x draught
371.92 ft / 370.00 ft x 35.00 ft x 12.90 ft (normal load)
113.36 m / 112.78 m x 10.67 m x 3.93 m

Armament:
8 - 4.33" / 110 mm guns (4x2 guns), 40.61lbs / 18.42kg shells, 1930 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
4 - 1.57" / 40.0 mm guns (2x2 guns), 1.95lbs / 0.89kg shells, 1930 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
10 - 0.79" / 20.0 mm guns (5x2 guns), 0.24lbs / 0.11kg shells, 1930 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 335 lbs / 152 kg
Shells per gun, main battery: 250
6 - 24.5" / 622.3 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.20" / 30 mm - -

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 35,573 shp / 26,537 Kw = 33.50 kts
Range 5,900nm at 15.00 kts
Bunker at max displacement = 476 tons

Complement:
143 - 186

Cost:
£0.901 million / $3.602 million

Distribution of weights at normal displacement:
Armament: 42 tons, 2.2 %
Armour: 20 tons, 1.0 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 20 tons, 1.0 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 901 tons, 47.5 %
Hull, fittings & equipment: 563 tons, 29.7 %
Fuel, ammunition & stores: 350 tons, 18.5 %
Miscellaneous weights: 20 tons, 1.1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
527 lbs / 239 Kg = 13.0 x 4.3 " / 110 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.29
Metacentric height 1.6 ft / 0.5 m
Roll period: 11.5 seconds
Steadiness - As gun platform (Average = 50 %): 66 %
- Recoil effect (Restricted arc if above 1.00): 0.55
Seaboat quality (Average = 1.00): 1.17

Hull form characteristics:
Hull has raised forecastle
and transom stern
Block coefficient: 0.397
Length to Beam Ratio: 10.57 : 1
'Natural speed' for length: 22.16 kts
Power going to wave formation at top speed: 65 %
Trim (Max stability = 0, Max steadiness = 100): 56
Bow angle (Positive = bow angles forward): 5.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21.90 ft / 6.68 m
- Forecastle (30 %): 19.00 ft / 5.79 m (14.00 ft / 4.27 m aft of break)
- Mid (50 %): 14.00 ft / 4.27 m
- Quarterdeck (15 %): 14.00 ft / 4.27 m
- Stern: 14.00 ft / 4.27 m
- Average freeboard: 15.85 ft / 4.83 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 172.7 %
- Above water (accommodation/working, high = better): 87.1 %
Waterplane Area: 8,259 Square feet or 767 Square metres
Displacement factor (Displacement / loading): 75 %
Structure weight / hull surface area: 34 lbs/sq ft or 164 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.46
- Longitudinal: 1.91
- Overall: 0.53
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped

Quoted

Originally posted by Marek Gutkowski

Quoted

Originally posted by thesmilingassassin
Polish design A1, Atlantis Destroyer laid down 1929

- Cross-sectional: 0.48

Isnt that in conflict with the desing rules.

Someone understands the rules better then I do! Your correct and the design has been edited, allthough it would seem a moot point now.

Poland after studing all the contesters desided that the design that meats best oure neans is the France Le Terrible class.

The Bourd the conclusion is.

The France ship is small and fast its weapons are satisfactionary.Range is above the specification.
In staling the polish weapons aloves to increse the magazine capacity.

Polish Navy and the forein Ministry also thanks all the participetors for there designs for there entrys.
And hopes that next years Submarine competition will also have such an entusiastic responce.

OCC:thanks guys for your designs
The reson is for this little competition is that I had all my my factorys can bild more material that my already large billding program neads.

Once agein thanks.

A 1930 submarine competition?? Great. I have a few interesting designs for that year...
... courtesy of the mad scientist to the left.
<=============================

thanks the Polish government for their order, and will commence construction of 2 destroyer hulls in January 1930. It is our estimate that the two destroyers, without armament but otherwise complete, and able to accept Polish guns and torpedo tubes, will be available for delivery in November 1930.

Here she is, once she's fittd out:

New class, Polish destroyer laid down 1930

Displacement:
1,333 t light; 1,379 t standard; 1,554 t normal; 1,694 t full load

Dimensions: Length overall / water x beam x draught
375.67 ft / 360.89 ft x 32.81 ft x 11.48 ft (normal load)
114.50 m / 110.00 m x 10.00 m x 3.50 m

Armament:
3 - 4.72" / 110 mm guns in single mounts, 40.61lbs / 18.42kg shells, 1930 Model
Breech loading guns in deck mounts
on centreline ends, majority forward, 1 raised mount
4 - 1.57" / 40.0 mm guns (1x4 guns), 1.95lbs / 0.89kg shells, 1930 Model
Breech loading guns in a deck mount with hoist
on centreline aft, all raised guns - superfiring
4 - 1.57" / 40.0 mm guns (2x2 guns), 1.95lbs / 0.89kg shells, 1930 Model
Breech loading guns in deck mounts with hoists
on side, evenly spread
4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1930 Model
Breech loading guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 138 lbs / 62 kg
Shells per gun, main battery: 250
8 - 23.6" / 600 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.20" / 5 mm -
2nd: 0.98" / 25 mm 0.20" / 5 mm -
3rd: 0.98" / 25 mm 0.20" / 5 mm -

- Conning tower: 1.18" / 30 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 35,857 shp / 26,750 Kw = 34.50 kts
Range 4,300nm at 15.00 kts
Bunker at max displacement = 315 tons

Complement:
123 - 160

Cost:
£0.714 million / $2.858 million

Distribution of weights at normal displacement:
Armament: 17 tons, 1.1 %
Armour: 11 tons, 0.7 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 7 tons, 0.5 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 3 tons, 0.2 %
Machinery: 812 tons, 52.3 %
Hull, fittings & equipment: 458 tons, 29.5 %
Fuel, ammunition & stores: 225 tons, 14.5 %
Miscellaneous weights: 30 tons, 1.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
441 lbs / 200 Kg = 10.9 x 4.3 " / 110 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.31
Metacentric height 1.5 ft / 0.5 m
Roll period: 11.2 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.20
Seaboat quality (Average = 1.00): 1.06

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.400
Length to Beam Ratio: 11.00 : 1
'Natural speed' for length: 21.80 kts
Power going to wave formation at top speed: 66 %
Trim (Max stability = 0, Max steadiness = 100): 66
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: 25.59 ft / 7.80 m
- Forecastle (20 %): 17.39 ft / 5.30 m
- Mid (50 %): 17.39 ft / 5.30 m (10.01 ft / 3.05 m aft of break)
- Quarterdeck (15 %): 10.01 ft / 3.05 m
- Stern: 11.48 ft / 3.50 m
- Average freeboard: 14.46 ft / 4.41 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 180.9 %
- Above water (accommodation/working, high = better): 64.6 %
Waterplane Area: 7,564 Square feet or 703 Square metres
Displacement factor (Displacement / loading): 64 %
Structure weight / hull surface area: 31 lbs/sq ft or 151 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.77
- Overall: 0.56
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform