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Monday, July 28th 2003, 1:01pm

Iberian destroyer history

Armada destroyers:

Ivañez, Iberia D laid down 1903

Displacement:
499 t light; 521 t standard; 574 t normal; 614 t full load
Loading submergence 88 tons/feet

Dimensions:
213.25 ft x 22.97 ft x 8.20 ft (normal load)
65.00 m x 7.00 m x 2.50 m

Armament:
4 - 3.94" / 100 mm guns
Weight of broadside 122 lbs / 55 kg
2 - 18.9" / 480 mm above water torpedoes

Machinery:
Oil fired boilers, complex reciprocating steam engines,
Direct drive, 3 shafts, 13,947 ihp / 10,404 Kw = 28.00 kts
Range 2,000nm at 12.00 kts
Caution: Delicate, lightweight machinery

Complement:
58 - 76

Cost:
£0.079 million / $0.317 million

Distribution of weights at normal displacement:
Armament: 15 tons, 2.7 %
Machinery: 350 tons, 61.0 %
Hull, fittings & equipment: 134 tons, 23.4 %
Fuel, ammunition & stores: 74 tons, 13.0 %
Miscellaneous weights: 0 tons, 0.0 %

Metacentric height 0.6

Remarks:
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage & compartmentation is extremely poor
Room for accommodation & workspaces is cramped
Caution: Lacks seaworthiness - very limited seakeeping ability

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.07
Shellfire needed to sink: 82 lbs / 37 Kg = 2.7 x 3.9 " / 100 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical

hits)
Torpedoes needed to sink: 0.1
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 51 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.33
Relative quality as seaboat: 0.51

Hull form characteristics:
Block coefficient: 0.500
Sharpness coefficient: 0.34
Hull speed coefficient 'M': 7.84
'Natural speed' for length: 14.60 kts
Power going to wave formation at top speed: 74 %
Trim: 100
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 216.7 %
Relative accommodation and working space: 69.1 %
(Average = 100%)
Displacement factor: 15 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.51
(Structure weight / hull surface area: 25 lbs / square foot or 120 Kg / square

metre)
Relative longitudinal hull strength: 1.14
(for 8.86 ft / 2.70 m average freeboard, freeboard adjustment 0.31 ft)
Relative composite hull strength: 0.55



Alvarez, Iberia D laid down 1906

Displacement:
601 t light; 625 t standard; 710 t normal; 775 t full load
Loading submergence 100 tons/feet

Dimensions:
229.66 ft x 23.95 ft x 8.86 ft (normal load)
70.00 m x 7.30 m x 2.70 m

Armament:
4 - 3.94" / 100 mm guns
6 - 0.53" / 14 mm guns
Weight of broadside 122 lbs / 56 kg
4 - 18.9" / 480 mm above water torpedoes

Armour:
Main gun shields 0.79" / 20 mm

Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 20,670 shp / 15,420 Kw = 30.00 kts
Range 2,500nm at 12.00 kts
Caution: Delicate, lightweight machinery

Complement:
68 - 89

Cost:
£0.092 million / $0.366 million

Distribution of weights at normal displacement:
Armament: 15 tons, 2.2 %
Armour: 3 tons, 0.5 %
Belts: 0 tons, 0.0 %, Armament: 3 tons, 0.5 %, Armour Deck: 0 tons, 0.0 %
Conning Tower: 0 tons, 0.0 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 412 tons, 58.1 %
Hull, fittings & equipment: 170 tons, 23.9 %
Fuel, ammunition & stores: 109 tons, 15.4 %
Miscellaneous weights: 0 tons, 0.0 %

Metacentric height 0.6

Remarks:
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage & compartmentation is extremely poor
Room for accommodation & workspaces is cramped
Caution: Lacks seaworthiness - very limited seakeeping ability

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.01
Shellfire needed to sink: 118 lbs / 54 Kg = 3.9 x 3.9 " / 100 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical

hits)
Torpedoes needed to sink: 0.1
(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: 0.41
Relative quality as seaboat: 0.68

Hull form characteristics:
Block coefficient: 0.510
Sharpness coefficient: 0.34
Hull speed coefficient 'M': 7.87
'Natural speed' for length: 15.15 kts
Power going to wave formation at top speed: 75 %
Trim: 96
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 203.7 %
Relative accommodation and working space: 67.0 %
(Average = 100%)
Displacement factor: 25 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.47
(Structure weight / hull surface area: 25 lbs / square foot or 124 Kg / square

metre)
Relative longitudinal hull strength: 1.44
(for 11.48 ft / 3.50 m average freeboard, freeboard adjustment 2.56 ft)
Relative composite hull strength: 0.52

unreliable steam turbines



Enter Name, Iberia D laid down 1908

Displacement:
850 t light; 883 t standard; 1,031 t normal; 1,145 t full load
Loading submergence 146 tons/feet

Dimensions:
285.43 ft x 28.54 ft x 8.86 ft (normal load)
87.00 m x 8.70 m x 2.70 m

Armament:
4 - 3.94" / 100 mm guns
4 - 2.24" / 57 mm guns
4 - 0.53" / 14 mm guns
Weight of broadside 145 lbs / 66 kg
4 - 18.9" / 480 mm above water torpedoes

Armour:
Main gun shields 0.79" / 20 mm

Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 19,454 shp / 14,513 Kw = 29.00 kts
Range 4,000nm at 12.00 kts

Complement:
90 - 118

Cost:
£0.123 million / $0.491 million

Distribution of weights at normal displacement:
Armament: 18 tons, 1.8 %
Armour: 4 tons, 0.3 %
Belts: 0 tons, 0.0 %, Armament: 4 tons, 0.3 %, Armour Deck: 0 tons, 0.0 %
Conning Tower: 0 tons, 0.0 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 556 tons, 53.9 %
Hull, fittings & equipment: 273 tons, 26.5 %
Fuel, ammunition & stores: 181 tons, 17.5 %
Miscellaneous weights: 0 tons, 0.0 %

Metacentric height 1.3

Remarks:
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage & compartmentation is cramped
Room for accommodation & workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.35
Shellfire needed to sink: 276 lbs / 125 Kg = 9.0 x 3.9 " / 100 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: 70 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.21
Relative quality as seaboat: 0.98

Hull form characteristics:
Block coefficient: 0.500
Sharpness coefficient: 0.33
Hull speed coefficient 'M': 8.63
'Natural speed' for length: 16.89 kts
Power going to wave formation at top speed: 68 %
Trim: 72
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 187.4 %
Relative accommodation and working space: 98.1 %
(Average = 100%)
Displacement factor: 49 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.54
(Structure weight / hull surface area: 30 lbs / square foot or 145 Kg / square

metre)
Relative longitudinal hull strength: 1.16
(for 12.47 ft / 3.80 m average freeboard, freeboard adjustment 2.85 ft)
Relative composite hull strength: 0.58




Enter ship name, Iberia D laid down 1910

Displacement:
898 t light; 931 t standard; 1,069 t normal; 1,176 t full load
Loading submergence 153 tons/feet

Dimensions:
295.28 ft x 29.20 ft x 8.86 ft (normal load)
90.00 m x 8.90 m x 2.70 m

Armament:
4 - 3.94" / 100 mm guns
4 - 2.24" / 57 mm guns
4 - 0.53" / 14 mm guns
Weight of broadside 145 lbs / 66 kg
4 - 18.9" / 480 mm above water torpedoes

Armour:
Main gun shields 0.79" / 20 mm

Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 25,821 shp / 19,263 Kw = 31.00 kts
Range 4,000nm at 12.00 kts

Complement:
93 - 121

Cost:
£0.129 million / $0.516 million

Distribution of weights at normal displacement:
Armament: 18 tons, 1.7 %
Armour: 4 tons, 0.3 %
Belts: 0 tons, 0.0 %, Armament: 4 tons, 0.3 %, Armour Deck: 0 tons, 0.0 %
Conning Tower: 0 tons, 0.0 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 588 tons, 55.0 %
Hull, fittings & equipment: 288 tons, 26.9 %
Fuel, ammunition & stores: 172 tons, 16.1 %
Miscellaneous weights: 0 tons, 0.0 %

Metacentric height 1.1

Remarks:
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage & compartmentation is cramped
Room for accommodation & workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.21
Shellfire needed to sink: 256 lbs / 116 Kg = 8.4 x 3.9 " / 100 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: 71 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.22
Relative quality as seaboat: 0.83

Hull form characteristics:
Block coefficient: 0.490
Sharpness coefficient: 0.33
Hull speed coefficient 'M': 8.82
'Natural speed' for length: 17.18 kts
Power going to wave formation at top speed: 70 %
Trim: 86
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 190.3 %
Relative accommodation and working space: 101.2 %
(Average = 100%)
Displacement factor: 47 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.53
(Structure weight / hull surface area: 30 lbs / square foot or 147 Kg / square

metre)
Relative longitudinal hull strength: 1.11
(for 12.47 ft / 3.80 m average freeboard, freeboard adjustment 2.78 ft)
Relative composite hull strength: 0.57






Enter ship name, Iberia D laid down 1912

Displacement:
998 t light; 1,033 t standard; 1,162 t normal; 1,261 t full load
Loading submergence 160 tons/feet

Dimensions:
305.12 ft x 30.02 ft x 9.25 ft (normal load)
93.00 m x 9.15 m x 2.82 m

Armament:
4 - 3.94" / 100 mm guns
4 - 2.24" / 57 mm guns
4 - 0.53" / 14 mm guns
Weight of broadside 145 lbs / 66 kg
4 - 18.9" / 480 mm above water torpedoes

Armour:
Main gun shields 0.79" / 20 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 30,399 shp / 22,678 Kw = 32.00 kts
Range 4,000nm at 12.00 kts

Complement:
99 - 129

Cost:
£0.142 million / $0.569 million

Distribution of weights at normal displacement:
Armament: 18 tons, 1.6 %
Armour: 4 tons, 0.3 %
Belts: 0 tons, 0.0 %, Armament: 4 tons, 0.3 %, Armour Deck: 0 tons, 0.0 %
Conning Tower: 0 tons, 0.0 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 659 tons, 56.7 %
Hull, fittings & equipment: 317 tons, 27.3 %
Fuel, ammunition & stores: 165 tons, 14.2 %
Miscellaneous weights: 0 tons, 0.0 %

Metacentric height 1.2

Remarks:
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage & compartmentation is cramped
Room for accommodation & workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.23
Shellfire needed to sink: 268 lbs / 122 Kg = 8.8 x 3.9 " / 100 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: 70 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.20
Relative quality as seaboat: 0.84

Hull form characteristics:
Block coefficient: 0.480
Sharpness coefficient: 0.32
Hull speed coefficient 'M': 8.87
'Natural speed' for length: 17.47 kts
Power going to wave formation at top speed: 70 %
Trim: 83
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 194.7 %
Relative accommodation and working space: 107.0 %
(Average = 100%)
Displacement factor: 45 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.52
(Structure weight / hull surface area: 31 lbs / square foot or 152 Kg / square

metre)
Relative longitudinal hull strength: 1.16
(for 13.12 ft / 4.00 m average freeboard, freeboard adjustment 3.28 ft)
Relative composite hull strength: 0.56




Enter ship name, Iberia D laid down 1914

Displacement:
1,008 t light; 1,043 t standard; 1,162 t normal; 1,253 t full load
Loading submergence 160 tons/feet

Dimensions:
305.12 ft x 30.02 ft x 9.25 ft (normal load)
93.00 m x 9.15 m x 2.82 m

Armament:
4 - 3.94" / 100 mm guns
4 - 2.24" / 57 mm guns
4 - 0.53" / 14 mm guns
Weight of broadside 145 lbs / 66 kg
4 - 18.9" / 480 mm above water torpedoes

Armour:
Main gun shields 0.79" / 20 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 34,772 shp / 25,940 Kw = 33.00 kts
Range 4,000nm at 12.00 kts

Complement:
99 - 129

Cost:
£0.185 million / $0.740 million

Distribution of weights at normal displacement:
Armament: 18 tons, 1.6 %
Armour: 4 tons, 0.3 %
Belts: 0 tons, 0.0 %, Armament: 4 tons, 0.3 %, Armour Deck: 0 tons, 0.0 %
Conning Tower: 0 tons, 0.0 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 677 tons, 58.2 %
Hull, fittings & equipment: 309 tons, 26.6 %
Fuel, ammunition & stores: 154 tons, 13.3 %
Miscellaneous weights: 0 tons, 0.0 %

Metacentric height 1.1

Remarks:
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage & compartmentation is cramped
Room for accommodation & workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.19
Shellfire needed to sink: 239 lbs / 109 Kg = 7.8 x 3.9 " / 100 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: 70 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.22
Relative quality as seaboat: 0.81

Hull form characteristics:
Block coefficient: 0.480
Sharpness coefficient: 0.32
Hull speed coefficient 'M': 8.87
'Natural speed' for length: 17.47 kts
Power going to wave formation at top speed: 72 %
Trim: 87
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 199.7 %
Relative accommodation and working space: 109.6 %
(Average = 100%)
Displacement factor: 41 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.48
(Structure weight / hull surface area: 30 lbs / square foot or 147 Kg / square

metre)
Relative longitudinal hull strength: 1.17
(for 13.45 ft / 4.10 m average freeboard, freeboard adjustment 3.61 ft)
Relative composite hull strength: 0.53




Enter ship name, Iberia D laid down 1916

Displacement:
1,271 t light; 1,308 t standard; 1,434 t normal; 1,529 t full load
Loading submergence 197 tons/feet

Dimensions:
344.49 ft x 32.81 ft x 9.25 ft (normal load)
105.00 m x 10.00 m x 2.82 m

Armament:
3 - 3.94" / 100 mm guns
2 - 2.24" / 57 mm guns
4 - 0.53" / 14 mm guns
Weight of broadside 103 lbs / 47 kg
4 - 18.9" / 480 mm above water torpedoes

Armour:
Main gun shields 0.79" / 20 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 36,747 shp / 27,413 Kw = 33.00 kts
Range 4,000nm at 12.00 kts

Complement:
116 - 151

Cost:
£0.281 million / $1.122 million

Distribution of weights at normal displacement:
Armament: 13 tons, 0.9 %
Armour: 3 tons, 0.2 %
Belts: 0 tons, 0.0 %, Armament: 3 tons, 0.2 %, Armour Deck: 0 tons, 0.0 %
Conning Tower: 0 tons, 0.0 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 830 tons, 57.9 %
Hull, fittings & equipment: 375 tons, 26.2 %
Fuel, ammunition & stores: 163 tons, 11.4 %
Miscellaneous weights: 50 tons, 3.5 %

Metacentric height 1.3

Remarks:
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage & compartmentation is cramped
Room for accommodation & workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.21
Shellfire needed to sink: 316 lbs / 143 Kg = 10.3 x 3.9 " / 100 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: 70 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.11
Relative quality as seaboat: 0.83

Hull form characteristics:
Block coefficient: 0.480
Sharpness coefficient: 0.32
Hull speed coefficient 'M': 9.34
'Natural speed' for length: 18.56 kts
Power going to wave formation at top speed: 68 %
Trim: 84
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 197.3 %
Relative accommodation and working space: 122.5 %
(Average = 100%)
Displacement factor: 50 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.51
(Structure weight / hull surface area: 31 lbs / square foot or 152 Kg / square

metre)
Relative longitudinal hull strength: 0.93
(for 13.45 ft / 4.10 m average freeboard, freeboard adjustment 3.18 ft)
Relative composite hull strength: 0.54

Armed with waterbombs


Enter ship name, Iberia D laid down 1918

Displacement:
1,278 t light; 1,316 t standard; 1,434 t normal; 1,523 t full load
Loading submergence 197 tons/feet

Dimensions:
344.49 ft x 32.81 ft x 9.25 ft (normal load)
105.00 m x 10.00 m x 2.82 m

Armament:
3 - 3.94" / 100 mm guns
2 - 2.24" / 57 mm guns
4 - 0.53" / 14 mm guns
Weight of broadside 103 lbs / 47 kg
4 - 18.9" / 480 mm above water torpedoes

Armour:
Main gun shields 0.79" / 20 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 36,747 shp / 27,413 Kw = 33.00 kts
Range 4,000nm at 12.00 kts

Complement:
116 - 151

Cost:
£0.339 million / $1.357 million

Distribution of weights at normal displacement:
Armament: 13 tons, 0.9 %
Armour: 3 tons, 0.2 %
Belts: 0 tons, 0.0 %, Armament: 3 tons, 0.2 %, Armour Deck: 0 tons, 0.0 %
Conning Tower: 0 tons, 0.0 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 815 tons, 56.8 %
Hull, fittings & equipment: 368 tons, 25.7 %
Fuel, ammunition & stores: 156 tons, 10.8 %
Miscellaneous weights: 80 tons, 5.6 %

Metacentric height 1.3

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

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.17
Shellfire needed to sink: 308 lbs / 140 Kg = 10.1 x 3.9 " / 100 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: 69 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.11
Relative quality as seaboat: 0.82

Hull form characteristics:
Block coefficient: 0.480
Sharpness coefficient: 0.32
Hull speed coefficient 'M': 9.34
'Natural speed' for length: 18.56 kts
Power going to wave formation at top speed: 68 %
Trim: 84
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 196.2 %
Relative accommodation and working space: 122.5 %
(Average = 100%)
Displacement factor: 51 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.50
(Structure weight / hull surface area: 30 lbs / square foot or 149 Kg / square

metre)
Relative longitudinal hull strength: 0.91
(for 13.45 ft / 4.10 m average freeboard, freeboard adjustment 3.18 ft)
Relative composite hull strength: 0.53

Armed with waterbombs and hedgehog

HoOmAn

Keeper of the Sacred Block Coefficient

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2

Monday, July 28th 2003, 3:23pm

History

Wouldn´t it be better to post histories like this on the infrastructure board as part of the Iberia-thread?

3

Monday, July 28th 2003, 4:29pm

well, I was hoping for some input into my designs before I do that. Also that thread gets summaries, not the full designs, as well as launch dates etc. haven't done that yet.

cheers

Bernhard

HoOmAn

Keeper of the Sacred Block Coefficient

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4

Monday, July 28th 2003, 4:52pm

Weak armament

3x 100mm in 1918 seems somewhat weak when comparing it to german or british designs. Don´t you have a caliber at hand that is somewhat larger but still fits on a DD?

5

Monday, July 28th 2003, 5:22pm

point

ok, here she is again, somewhat better armed

I think the weak armament stems from the time when she still had 20" gun shieds ;-)

and my 130 mm only just got ready in 1921. So unless I want to pull an early Narvik class ...

cheers

Bernhard

Enter ship name, Iberia D laid down 1918

Displacement:
1,275 t light; 1,316 t standard; 1,434 t normal; 1,523 t full load
Loading submergence 197 tons/feet

Dimensions:
344.49 ft x 32.81 ft x 9.25 ft (normal load)
105.00 m x 10.00 m x 2.82 m

Armament:
4 - 3.94" / 100 mm guns
4 - 2.24" / 57 mm guns
4 - 0.53" / 14 mm guns
Weight of broadside 145 lbs / 66 kg
6 - 18.9" / 480 mm above water torpedoes

Armour:
Main gun shields 0.79" / 20 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 36,747 shp / 27,413 Kw = 33.00 kts
Range 4,000nm at 12.00 kts

Complement:
116 - 151

Cost:
£0.345 million / $1.382 million

Distribution of weights at normal displacement:
Armament: 18 tons, 1.3 %
Armour: 4 tons, 0.3 %
Belts: 0 tons, 0.0 %, Armament: 4 tons, 0.3 %, Armour Deck: 0 tons, 0.0 %
Conning Tower: 0 tons, 0.0 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 806 tons, 56.2 %
Hull, fittings & equipment: 367 tons, 25.6 %
Fuel, ammunition & stores: 159 tons, 11.1 %
Miscellaneous weights: 80 tons, 5.6 %

Metacentric height 1.2

Remarks:
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage & compartmentation is cramped
Room for accommodation & workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.13
Shellfire needed to sink: 293 lbs / 133 Kg = 9.6 x 3.9 " / 100 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: 71 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.16
Relative quality as seaboat: 0.82

Hull form characteristics:
Block coefficient: 0.480
Sharpness coefficient: 0.32
Hull speed coefficient 'M': 9.34
'Natural speed' for length: 18.56 kts
Power going to wave formation at top speed: 68 %
Trim: 87
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 197.0 %
Relative accommodation and working space: 107.4 %
(Average = 100%)
Displacement factor: 50 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.49
(Structure weight / hull surface area: 30 lbs / square foot or 149 Kg / square metre)
Relative longitudinal hull strength: 0.89
(for 13.45 ft / 4.10 m average freeboard, freeboard adjustment 3.18 ft)
Relative composite hull strength: 0.52

Armed with waterbombs and hedgehog

6

Monday, July 28th 2003, 9:17pm

Quoted

Originally posted by HoOmAn
Wouldn´t it be better to post histories like this on the infrastructure board as part of the Iberia-thread?


I would say that design-histories, showing the longer lines of development of a shiptype within a navy, have no place on the infrastructure-board, and indeed have their home on the ship design board.

7

Tuesday, July 29th 2003, 2:40pm

Again, seakeeping

Quite speedy, for their times, and pretty good ranges too. But the poor, soaked crews forward...

Relative quality as seaboat: 0.51
Relative quality as seaboat: 0.68
Relative quality as seaboat: 0.98
Relative quality as seaboat: 0.83
Relative quality as seaboat: 0.84
Relative quality as seaboat: 0.81
Relative quality as seaboat: 0.83
Relative quality as seaboat: 0.82

This will also impact a ship's ability to keep up with the fleet in heavy weather. That might not be a problem in the western Med, but get out to the Atlantic or the Carribbean and these ships might have problems.

HoOmAn

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8

Tuesday, July 29th 2003, 3:30pm

Seaworthyness

Isn´t this quite normal for DDs? Most of them had problems in realy heavy weather, IIRC, one reason being that their are simply that much smaller than cruisers or capital units....

9

Tuesday, July 29th 2003, 4:04pm

Seaworthiness

Well, maybe that's just a particular priority of mine:

French Brandelbas class destroyers, laid down 1907
Length, 55.0 m x Beam, 6.0 m x Depth, 3.2 m
426 tonnes normal displacement (388 tonnes standard)
Relative quality as a seaboat: 1.09

French Spahi class destroyers, laid down 1909
Length, 70.0 m x Beam, 6.7 m x Depth, 3.3 m
624 tonnes normal displacement (566 tonnes standard)
Relative quality as a seaboat: 1.22

French Bouclier Class Destroyer, laid down 1910
Length, 80.0 m x Beam, 7.5 m x Depth, 4.0 m
968 tonnes normal displacement (861 tonnes
Relative quality as a seaboat: 1.22

French Bisson class destroyers, laid down 1910
Length, 70.0 m x Beam, 7.5 m x Depth, 3.8 m
805 tonnes normal displacement (723 tonnes standard)
Relative quality as a seaboat: 1.06


French Aventurieur class destroyers, laid down 1911
Length, 80.0 m x Beam, 8.0 m x Depth, 4.0 m
1032 tonnes normal displacement (968 tonnes standard)
Relative quality as a seaboat: 1.10


French Arabe Class Destroyer, laid down 1917
Length, 90.0 m x Beam, 8.5 m x Depth, 4.0 m
1234 tonnes normal displacement (1140 tonnes standard)
Relative quality as a seaboat: 1.28

French Audaciaux class destroyer, laid down 1921
Length, 100.0 m x Beam, 8.8 m x Depth, 3.6 m
1366 tonnes normal displacement (1231 tonnes standard)
Relative quality as a seaboat: 1.20

Russian Bucharskiy Class Destroyer, laid down 1904
Length, 72.5 m x Beam, 8.2 m x Depth, 2.3 m
620 tonnes normal displacement (560 tonnes standard)
Relative quality as a seaboat: 1.23

Russian Sibirsky Strelok Class Destroyer, laid down 1905
Length, 72.5 m x Beam, 8.2 m x Depth, 2.3 m
758 tonnes normal displacement (632 tonnes standard)
Relative quality as a seaboat: 1.20


Russian Novik class destroyers, laid down 1910
Length, 102.5 m x Beam, 9.5 m x Depth, 3.5 m
1374 tonnes normal displacement (1220 tonnes standard)
Relative quality as a seaboat: 1.23


Russian Chastlyvy class destroyers, laid down 1913
Length, 98.0 m x Beam, 9.4 m x Depth, 3.2 m
1635 tonnes normal displacement (1458 tonnes standard)
Relative quality as a seaboat: 1.20


Russian Izyslav class destroyers, laid down 1914
Length, 107.0 m x Beam, 9.4 m x Depth, 3.0 m
1947 tonnes normal displacement (1736 tonnes standard)
Relative quality as a seaboat: 1.20


Russian Orphey class destroyers, laid down 1915
Length, 98.0 m x Beam, 9.3 m x Depth, 3.0 m
1378 tonnes normal displacement (1288 tonnes standard)
Relative quality as a seaboat: 1.21

Tashkent Class, Russia Destroyer laid down 1921
Displacement:
1,446 t light; 1,496 t standard; 1,652 t normal; 1,771 t full load
Relative quality as seaboat: 1.21

While Russian destroyers in the Baltic and Black Seas don't have bad problems with stormy seas, the North Atlantic and Arctic Oceans can be a problem.

France also designs to Atlantic conditions, but sometimes has trouble fitting it all in....

10

Wednesday, July 30th 2003, 1:41am

well, I am with Hooman. Also let's not forget that seaworthiness is at full speed. And I don't forsee big probs in the Caribbean. Central Atlantic might be different. BTW: anybody considered what the trade winds are going to be like with Atlantis sitting slap bang in the middle of them?

cheers

Bernhard

11

Wednesday, July 30th 2003, 2:27am

Weather in the Caribbean

Umm, big-time hurricanes in the late summer and fall. They kill people by the hundreds in coastal areas.

12

Wednesday, July 30th 2003, 3:15pm

I know about them. But flatly they do not constitute fighting conditions and I have _lots_ of harbours across the Caribbean for my ships to get into.