WesWorld

[IMG]http://wesworld.jk-clan.de/schiffbilder/Iberian DD 1921.GIF[/IMG]

Thanks to Wes for the details in the drawing, m original deign was much plainer!

D 72, Iberia DD laid down 1921

Displacement:
1,380 t light; 1,430 t standard; 1,574 t normal; 1,682 t full load
Loading submergence 204 tons/feet

Dimensions:
377.30 ft x 34.45 ft x 10.33 ft (normal load)
115.00 m x 10.50 m x 3.15 m

Armament:
3 - 5.12" / 130 mm guns
4 - 2.24" / 57 mm guns
4 - 0.53" / 14 mm guns
Weight of broadside 224 lbs / 102 kg
6 - 23.6" / 600 mm above water torpedoes

Armour:
Main gun shields 0.79" / 20 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 39,779 shp / 29,675 Kw = 34.00 kts
Range 5,000nm at 12.00 kts

Complement:
124 - 162

Cost:
£0.495 million / $1.981 million

Distribution of weights at normal displacement:
Armament: 28 tons, 1.8 %
Armour: 4 tons, 0.2 %
Belts: 0 tons, 0.0 %, Armament: 4 tons, 0.2 %, Armour Deck: 0 tons, 0.0 %
Conning Tower: 0 tons, 0.0 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 877 tons, 55.7 %
Hull, fittings & equipment: 421 tons, 26.8 %
Fuel, ammunition & stores: 194 tons, 12.3 %
Miscellaneous weights: 50 tons, 3.2 %

Metacentric height 1.6

Remarks:
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage & compartmentation is cramped
Room for accommodation & workspaces is cramped
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.30
Shellfire needed to sink: 323 lbs / 147 Kg = 4.8 x 5.1 " / 130 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 0.2
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 65 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.17
Relative quality as seaboat: 0.88

Hull form characteristics:
Block coefficient: 0.410
Sharpness coefficient: 0.29
Hull speed coefficient 'M': 9.91
'Natural speed' for length: 19.42 kts
Power going to wave formation at top speed: 65 %
Trim: 74
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 196.7 %
Relative accommodation and working space: 86.1 %
(Average = 100%)
Displacement factor: 52 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.49
(Structure weight / hull surface area: 33 lbs / square foot or 159 Kg / square metre)
Relative longitudinal hull strength: 0.81
(for 13.12 ft / 4.00 m average freeboard, freeboard adjustment 2.66 ft)
Relative composite hull strength: 0.52

3 funnels

Just the thing to play with the Russian Tashkent class or the French Audaciaux class, especially if there's a bit of weather, mwaa-haa-haa!

On the other hand, those big torpedos of yours bear considerable watching (and don't think French and Russian naval intelligence aren't doing just that!)

don't forget that the seakeeping is always at full speed, still your Audacieux aren't baaad at all.

Follow on class, built specifically for the bay of Biskay }:-]>

D 83, Iberia DD laid down 1922

Displacement:
1,462 t light; 1,520 t standard; 1,668 t normal; 1,780 t full load
Loading submergence 181 tons/feet

Dimensions:
370.73 ft x 30.84 ft x 12.30 ft (normal load)
113.00 m x 9.40 m x 3.75 m

Armament:
4 - 5.12" / 130 mm guns
4 - 2.24" / 57 mm guns
4 - 0.53" / 14 mm guns
Weight of broadside 291 lbs / 132 kg
8 - 23.6" / 600 mm above water torpedoes

Armour:
Main gun shields 0.79" / 20 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 41,244 shp / 30,768 Kw = 34.00 kts
Range 5,000nm at 12.00 kts

Complement:
130 - 169

Cost:
£0.573 million / $2.292 million

Distribution of weights at normal displacement:
Armament: 36 tons, 2.2 %
Armour: 5 tons, 0.3 %
Belts: 0 tons, 0.0 %, Armament: 5 tons, 0.3 %, Armour Deck: 0 tons, 0.0 %
Conning Tower: 0 tons, 0.0 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 917 tons, 55.0 %
Hull, fittings & equipment: 454 tons, 27.2 %
Fuel, ammunition & stores: 206 tons, 12.3 %
Miscellaneous weights: 50 tons, 3.0 %

Metacentric height 1.0

Remarks:
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage & compartmentation is cramped
Room for accommodation & workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.08
Shellfire needed to sink: 315 lbs / 143 Kg = 4.7 x 5.1 " / 130 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 0.2
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 90 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.52
Relative quality as seaboat: 1.28

Hull form characteristics:
Block coefficient: 0.415
Sharpness coefficient: 0.28
Hull speed coefficient 'M': 9.55
'Natural speed' for length: 19.25 kts
Power going to wave formation at top speed: 64 %
Trim: 70
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 197.2 %
Relative accommodation and working space: 55.9 %
(Average = 100%)
Displacement factor: 53 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.48
(Structure weight / hull surface area: 34 lbs / square foot or 164 Kg / square metre)
Relative longitudinal hull strength: 1.18
(for 15.42 ft / 4.70 m average freeboard, freeboard adjustment 4.84 ft)
Relative composite hull strength: 0.53

3 funnels

Quoted

don't forget that the seakeeping is always at full speed,

Yup, which means that even in heavy seas, French/Russian DDs go as fast as they need.

Now, that follow-on design is something I'd definitely try to fit into my 1921 building plan!!

well, the first class is for those hard to get to places in the caribbean and estuaries - notice the shallow draught...

Bernhard