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1

Monday, May 19th 2003, 6:30am

Atlantian WW1 cruiser

Comments please....

Argyll, Atlantis cruiser laid down 1914

Displacement:
7,245 t light; 7,466 t standard; 8,257 t normal; 8,857 t full load
Loading submergence 576 tons/feet

Dimensions:
570.00 ft x 56.00 ft x 18.00 ft (normal load)
173.74 m x 17.07 m x 5.49 m

Armament:
8 - 5.50" / 140 mm guns
6 - 1.00" / 25 mm guns
Weight of broadside 669 lbs / 303 kg
4 - 21.0" / 533.4 mm above water torpedoes

Armour:
Belt 3.00" / 76 mm, end belts 1.50" / 38 mm
Belts cover 90 % of normal area
Main belt does not fully protect magazines and engineering spaces
Main gun shields 2.00" / 51 mm
Armour deck 1.50" / 38 mm, Conning tower 2.00" / 51 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 79,415 shp / 59,244 Kw = 32.32 kts
Range 8,000nm at 12.00 kts

Complement:
433 - 563

Cost:
£0.957 million / $3.829 million

Distribution of weights at normal displacement:
Armament: 84 tons, 1.0 %
Armour: 1,068 tons, 12.9 %
Belts: 457 tons, 5.5 %, Armament: 35 tons, 0.4 %, Armour Deck: 559 tons, 6.8 %
Conning Tower: 18 tons, 0.2 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 3,059 tons, 37.0 %
Hull, fittings & equipment: 3,034 tons, 36.7 %
Fuel, ammunition & stores: 1,012 tons, 12.3 %
Miscellaneous weights: 0 tons, 0.0 %

Metacentric height 3.5

Remarks:
Hull space for machinery, storage & compartmentation is cramped
Room for accommodation & workspaces is excellent
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: 1.33
Shellfire needed to sink: 6,951 lbs / 3,153 Kg = 83.6 x 5.5 " / 140 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 1.0
(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: 0.10
Relative quality as seaboat: 1.22

Hull form characteristics:
Block coefficient: 0.503
Sharpness coefficient: 0.33
Hull speed coefficient 'M': 8.62
'Natural speed' for length: 23.87 kts
Power going to wave formation at top speed: 57 %
Trim: 57
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 128.0 %
Relative accommodation and working space: 161.9 %
(Average = 100%)
Displacement factor: 105 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.98
(Structure weight / hull surface area: 89 lbs / square foot or 434 Kg / square metre)
Relative longitudinal hull strength: 1.30
(for 20.00 ft / 6.10 m average freeboard, freeboard adjustment 5.43 ft)
Relative composite hull strength: 1.00

2

Monday, May 19th 2003, 10:50pm

Well, two things

- you have the same problem i am having with Aguila, your ship is too long for a 170 m slip. (should we maybe allow type 2 to be 180 m?)
- 8 guns none superimposed? I like the calibre though.

cheers

Bernhard

3

Monday, May 19th 2003, 11:44pm

well

The guns are in sheilds not turrets so i assumed the super-emposed stat need not apply. These ships are already in service just hopeing the design seems satisfactory. I'll have to read the building rules but maybe we can attach the tip of the stern after she is launched? I'll have to look at the rules for that.

4

Tuesday, May 20th 2003, 12:15am

The ship is laid down in 1914, at a time when ships with lots of single shielded gunmounts all on main-deck or forecastle-level was quite common. The one exception one might find, would be that one would find one superimposed gun aft on some classes.

5

Tuesday, May 20th 2003, 12:37am

exactly

In this case she has two super emposed sheilded guns in B and X positions. Picture a Japanese Sendai with a British C class cruiser style bridge. She has four funnels grouped in pairs and 4 wing mounted 5.5" turrets midships.

HoOmAn

Keeper of the Sacred Block Coefficient

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6

Tuesday, May 20th 2003, 12:57am

Well done.

I like her. A balanced design and damn fast for 1914 - keeping in mind that she must have been even faster on trials.

Is the stated armament what she carries in 1920? I ask because of the 25mm guns.

Maybe you can add 50ts misc weight - just for the sake of it.

Anyway, I really like her. She seems to have her roots somewhere among the british Towns (76mm belt etc.). Am I right?

Cheers,

HoOmAn

7

Tuesday, May 20th 2003, 1:53am

actually

Shes a modified version of the Medusa class CA's (my Hawkins clones) with lighter armament. The 25mm guns are indeed what they carry in 1920, I like to springstyle my designs to the current timeframe (except future designs of course). I really just based the design on the Medusa with new armament requirements and as much speed as i could get. Heres the follow on design with improved armor at the expense of some speed and armament.

Warrior, Atlantis cruiser laid down 1914

Displacement:
7,255 t light; 7,469 t standard; 8,257 t normal; 8,855 t full load
Loading submergence 576 tons/feet

Dimensions:
570.00 ft x 56.00 ft x 18.00 ft (normal load)
173.74 m x 17.07 m x 5.49 m

Armament:
7 - 5.50" / 140 mm guns
6 - 1.00" / 25 mm guns
Weight of broadside 585 lbs / 265 kg
4 - 21.0" / 533.4 mm above water torpedoes

Armour:
Belt 3.00" / 76 mm, end belts 1.25" / 32 mm
Belts cover 100 % of normal area
Main belt does not fully protect magazines and engineering spaces
Main gun shields 2.00" / 51 mm
Armour deck 1.50" / 38 mm, Conning tower 2.00" / 51 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 68,050 shp / 50,765 Kw = 31.11 kts
Range 8,000nm at 12.00 kts

Complement:
433 - 563

Cost:
£0.868 million / $3.474 million

Distribution of weights at normal displacement:
Armament: 73 tons, 0.9 %
Armour: 1,098 tons, 13.3 %
Belts: 491 tons, 5.9 %, Armament: 30 tons, 0.4 %, Armour Deck: 559 tons, 6.8 %
Conning Tower: 18 tons, 0.2 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 2,621 tons, 31.7 %
Hull, fittings & equipment: 3,412 tons, 41.3 %
Fuel, ammunition & stores: 1,003 tons, 12.1 %
Miscellaneous weights: 50 tons, 0.6 %

Metacentric height 3.2

Remarks:
Hull space for machinery, storage & compartmentation is adequate
Room for accommodation & workspaces is excellent
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: 1.27
Shellfire needed to sink: 9,097 lbs / 4,126 Kg = 109.4 x 5.5 " / 140 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 1.3
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 72 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.10
Relative quality as seaboat: 1.31

Hull form characteristics:
Block coefficient: 0.503
Sharpness coefficient: 0.33
Hull speed coefficient 'M': 8.62
'Natural speed' for length: 23.87 kts
Power going to wave formation at top speed: 55 %
Trim: 55
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 110.7 %
Relative accommodation and working space: 161.9 %
(Average = 100%)
Displacement factor: 118 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 1.12
(Structure weight / hull surface area: 100 lbs / square foot or 488 Kg / square metre)
Relative longitudinal hull strength: 1.48
(for 20.00 ft / 6.10 m average freeboard, freeboard adjustment 5.43 ft)
Relative composite hull strength: 1.15

HoOmAn

Keeper of the Sacred Block Coefficient

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8

Tuesday, May 20th 2003, 11:31am

Better protected?

In which way is the Warrior better protected? As it seems the opposite is true. Armor thickness is about the same while her belt doesn´t fully protect her vitals.....?

Cheers,

HoOmAn

9

Tuesday, May 20th 2003, 9:57pm

your right

I have 4 CL designs on the go right now so i'm confusing myself! This is the design that has thicker armor, allthough it still dosn't cover all the vitals.

Eridanus, Atlantis cruiser laid down 1917

Displacement:
7,219 t light; 7,423 t standard; 8,112 t normal; 8,631 t full load
Loading submergence 565 tons/feet

Dimensions:
560.00 ft x 56.00 ft x 18.00 ft (normal load)
170.69 m x 17.07 m x 5.49 m

Armament:
6 - 5.50" / 140 mm guns
8 - 1.00" / 25 mm guns
Weight of broadside 503 lbs / 228 kg
4 - 21.0" / 533.4 mm above water torpedoes

Armour:
Belt 4.00" / 102 mm, end belts 1.25" / 32 mm
Belts cover 100 % of normal area
Main belt does not fully protect magazines and engineering spaces
Main gun shields 2.00" / 51 mm
Armour deck 1.00" / 25 mm, Conning tower 2.00" / 51 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 81,823 shp / 61,040 Kw = 32.57 kts
Range 8,000nm at 12.00 kts

Complement:
427 - 555

Cost:
£1.319 million / $5.276 million

Distribution of weights at normal displacement:
Armament: 63 tons, 0.8 %
Armour: 1,027 tons, 12.7 %
Belts: 617 tons, 7.6 %, Armament: 26 tons, 0.3 %, Armour Deck: 366 tons, 4.5 %
Conning Tower: 17 tons, 0.2 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 2,999 tons, 37.0 %
Hull, fittings & equipment: 3,080 tons, 38.0 %
Fuel, ammunition & stores: 893 tons, 11.0 %
Miscellaneous weights: 50 tons, 0.6 %

Metacentric height 3.3

Remarks:
Hull space for machinery, storage & compartmentation is cramped
Room for accommodation & workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.28
Shellfire needed to sink: 6,853 lbs / 3,109 Kg = 82.4 x 5.5 " / 140 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 1.0
(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: 0.08
Relative quality as seaboat: 1.17

Hull form characteristics:
Block coefficient: 0.503
Sharpness coefficient: 0.33
Hull speed coefficient 'M': 8.52
'Natural speed' for length: 23.66 kts
Power going to wave formation at top speed: 58 %
Trim: 60
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 126.6 %
Relative accommodation and working space: 161.0 %
(Average = 100%)
Displacement factor: 107 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 1.02
(Structure weight / hull surface area: 92 lbs / square foot or 449 Kg / square metre)
Relative longitudinal hull strength: 1.40
(for 20.00 ft / 6.10 m average freeboard, freeboard adjustment 5.48 ft)
Relative composite hull strength: 1.06