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1

Monday, July 5th 2004, 1:37am

HSwMS Urd, armoured cruiser

The second batch of swedish armoured cruisers(1st Kronprinsen, 2nd, Urd and 3d Valkyria). modeled after the British Cressys.


New pictures for Tapperheten, Dristigheten and Admiral-class ships are added.

Urd, Armoured cruiser Sweden laid down 1901

Displacement:
9 123 t light; 9 447 t standard; 10 000 t normal; 10 403 t full load
Loading submergence 617 tons/feet

Dimensions:
442,91 ft x 72,18 ft x 19,69 ft (normal load)
135,00 m x 22,00 m x 6,00 m

Armament:
2 - 8,27" / 210 mm guns (2 Main turrets x 1 guns)
8 - 5,98" / 152 mm guns (4 2nd turrets x 2 guns)
10 - 2,24" / 57 mm QF guns
QF guns mounted low & subject to being washed down in a seaway
2 - 0,79" / 20 mm guns
Weight of broadside 1 479 lbs / 671 kg
2 - 18,0" / 457,2 mm submerged torpedo tubes

Armour:
Belt 5,98" / 152 mm, upper belt 0,98" / 25 mm, end belts 0,98" / 25 mm
Belts cover 134 % of normal area
Main turrets 7,87" / 200 mm, 2nd turrets 4,92" / 125 mm
QF casemates 0,98" / 25 mm, Light gun shields 0,20" / 5 mm
Armour deck 1,18" / 30 mm, Conning tower 4,92" / 125 mm

Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 3 shafts, 23 191 ihp / 17 300 Kw = 22,00 kts
Range 4 000nm at 10,00 kts

Complement:
500 - 650

Cost:
£0,974 million / $3,897 million

Distribution of weights at normal displacement:
Armament: 185 tons, 1,8 %
Armour: 2 310 tons, 23,1 %
Belts: 1 233 tons, 12,3 %, Armament: 556 tons, 5,6 %, Armour Deck: 471 tons, 4,7 %
Conning Tower: 49 tons, 0,5 %, Torpedo bulkhead: 0 tons, 0,0 %
Machinery: 3 568 tons, 35,7 %
Hull, fittings & equipment: 3 061 tons, 30,6 %
Fuel, ammunition & stores: 877 tons, 8,8 %
Miscellaneous weights: 0 tons, 0,0 %

Metacentric height 4,8

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: 1,28
Shellfire needed to sink: 6 098 lbs / 2 766 Kg = 21,6 x 8,3 " / 210 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 1,1
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 84 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0,17
Relative quality as seaboat: 1,20

Hull form characteristics:
Block coefficient: 0,556
Sharpness coefficient: 0,41
Hull speed coefficient 'M': 6,29
'Natural speed' for length: 21,05 kts
Power going to wave formation at top speed: 52 %
Trim: 70
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 132,9 %
Relative accommodation and working space: 121,4 %
(Average = 100%)
Displacement factor: 92 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0,97
(Structure weight / hull surface area: 102 lbs / square foot or 498 Kg / square metre)
Relative longitudinal hull strength: 1,29
(for 14,76 ft / 4,50 m average freeboard, freeboard adjustment -0,38 ft)
Relative composite hull strength: 1,00

Number in class 3: Urd, Skuld, Verdande

What do you think?

2

Monday, July 5th 2004, 2:01am

secondaries turreted? I'd expect casematted?

3

Monday, July 5th 2004, 2:36am

Not nessassarily, Sweden is one of those odd little country's that went to turreted secondary's earlier than most navy's, and used turrets for smaller calibers as well. For example the Flygia, built in 1905, was armed with 4 twin 6" turrets, two being side by side amidships.
The Gota and Thule, built in 1889/93 were armed with one 8.2" and seven 6" in single turrets.

Swedens ships were a kind of cross between coastal defence ships and armoured cruisers

4

Monday, July 5th 2004, 3:31am

Besides are casemated large gunse ugly(look at Cressy, that can't be healty, with two decks of casemated guns), and not so effective - shorter range due less hight over water, risk of being washed down i a seaway, weaking of the hull - large risk of getting a conclusive hit at the thin armour at the casemate shield

This design is a kind of cruiser version of the Oscar II from 1906.

5

Monday, July 5th 2004, 3:39am

So she can be compaired to a capital ship in layout, similar to the German Blucher being a slightly smaller version of the BB Nassau.

6

Tuesday, July 6th 2004, 5:50pm

Yes almost, single turrets forward and aft, 6" turrets in each corner, like Oscar II, but with more speed and almost the same kind of armour