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dc1
Post subject: Re: Imperial Swedish NavyPosted: January 2nd, 2012, 3:44 pm
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Nice. The forward superstructure / brigde look a little japanese... I still think that SS underestimate the fuel carried and thus range. In real lift the figure would be at lest two times whats suggested. At 14 knots she should be capable of 2000-2750 NM......


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Psilander
Post subject: Re: Imperial Swedish NavyPosted: January 4th, 2012, 10:42 pm
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Yes, she is abit inspired by the Japanese, I just thougt european/ US DDs from the 1930s where so boring so I looked at the japanese ones.

Here is her succesor, the Bielke. A bit odd with a heavy 6" battery. It was thought that the long barelled 105mm was too light for effective ASuW work and when the news arrived of the 150mm gunned german destoryers a navy siftly changed to a 6" in design. The mounts used where originally planned for some cruisers.

But of course they suffered from the same problems as the germans, poor seaboats and slow rof. The AA role was a bit better though with the new rapid 75mm twin mount and the good 40/36 L60 mount. The had by swedish standards a small torpedo load with just 5 533mm TTs.

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Quote:
Bielke, Sweden Destroyer laid down 1940

Displacement:
3 048 t light; 3 178 t standard; 3 300 t normal; 3 399 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(372,13 ft / 360,89 ft) x 45,93 ft x (13,12 / 13,42 ft)
(113,42 m / 110,00 m) x 14,00 m x (4,00 / 4,09 m)

Armament:
6 - 5,98" / 152 mm 55,0 cal guns - 115,65lbs / 52,46kg shells, 150 per gun
Quick firing guns in turret on barbette mounts, 1940 Model
2 x Triple mounts on centreline ends, evenly spread
4 - 2,95" / 75,0 mm 55,0 cal guns - 13,89lbs / 6,30kg shells, 150 per gun
Dual purpose guns in deck and hoist mounts, 1940 Model
2 x Twin mounts on centreline ends, evenly spread
2 raised mounts
8 - 1,57" / 40,0 mm 60,0 cal guns - 2,14lbs / 0,97kg shells, 150 per gun
Anti-air guns in deck mounts, 1936 Model
4 x Twin mounts on sides, evenly spread
4 raised mounts
Weight of broadside 767 lbs / 348 kg
Main Torpedoes
5 - 21,0" / 533 mm, 26,25 ft / 8,00 m torpedoes - 1,750 t each, 8,750 t total
In 1 sets of deck mounted centre rotating tubes
Main DC/AS Mortars
2 - 231,49 lbs / 105,00 kg Depth Charges + 30 reloads - 3,307 t total
in Stern depth charge racks
2nd DC/AS Mortars
2 - 231,49 lbs / 105,00 kg Depth Charges + 30 reloads - 3,307 t total
in Stern depth charge racks

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1,97" / 50 mm 0,98" / 25 mm 1,97" / 50 mm
2nd: 0,39" / 10 mm 0,20" / 5 mm 0,39" / 10 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 76 647 shp / 57 179 Kw = 35,00 kts
Range 2 000nm at 14,00 kts
Bunker at max displacement = 221 tons

Complement:
217 - 283

Cost:
£2,665 million / $10,662 million

Distribution of weights at normal displacement:
Armament: 241 tons, 7,3 %
- Guns: 215 tons, 6,5 %
- Weapons: 26 tons, 0,8 %
Armour: 58 tons, 1,7 %
- Armament: 58 tons, 1,7 %
Machinery: 1 780 tons, 53,9 %
Hull, fittings & equipment: 970 tons, 29,4 %
Fuel, ammunition & stores: 253 tons, 7,7 %
Miscellaneous weights: 0 tons, 0,0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
829 lbs / 376 Kg = 7,7 x 6,0 " / 152 mm shells or 0,3 torpedoes
Stability (Unstable if below 1.00): 1,43
Metacentric height 2,9 ft / 0,9 m
Roll period: 11,4 seconds
Steadiness - As gun platform (Average = 50 %): 22 %
- Recoil effect (Restricted arc if above 1.00): 0,23
Seaboat quality (Average = 1.00): 0,14

Hull form characteristics:
Hull has rise forward of midbreak,
a normal bow and small transom stern
Block coefficient (normal/deep): 0,531 / 0,535
Length to Beam Ratio: 7,86 : 1
'Natural speed' for length: 20,57 kts
Power going to wave formation at top speed: 75 %
Trim (Max stability = 0, Max steadiness = 100): 68
Bow angle (Positive = bow angles forward): 22,00 degrees
Stern overhang: 3,28 ft / 1,00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 10,00 %, 19,69 ft / 6,00 m, 16,40 ft / 5,00 m
- Forward deck: 20,00 %, 16,40 ft / 5,00 m, 16,40 ft / 5,00 m
- Aft deck: 67,00 %, 9,84 ft / 3,00 m, 9,84 ft / 3,00 m
- Quarter deck: 3,00 %, 9,84 ft / 3,00 m, 9,84 ft / 3,00 m
- Average freeboard: 11,94 ft / 3,64 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 198,0 %
- Above water (accommodation/working, high = better): 103,0 %
Waterplane Area: 11 642 Square feet or 1 082 Square metres
Displacement factor (Displacement / loading): 66 %
Structure weight / hull surface area: 65 lbs/sq ft or 318 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,74
- Longitudinal: 1,11
- Overall: 0,77
Cramped machinery, storage, compartmentation space
Adequate accommodation and workspace room
Ship has quick, lively roll, not a steady gun platform
Caution: Lacks seaworthiness - very limited seakeeping ability - (due to speed, if speed drops to 21kts it is 1,05...)

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Psilander
Post subject: Re: Imperial Swedish NavyPosted: January 6th, 2012, 9:14 pm
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After the two more or less expremental classes of destroyers, the Adlercreutz and Bielke classes the navy choose the safe way when war was imminent...
The von Cardell class was in many was q quite conservative design, mounting 12cm guns and 40/36 L60 AAA. They where built in large numbers together with the D-type /von Döbeln enlarged subtype to adjust some of the problems with the design.

[ img ]
Quote:
von Cardell, Sweden Destroyer laid down 1941

Displacement:
2 058 t light; 2 123 t standard; 2 212 t normal; 2 283 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(337,26 ft / 328,08 ft) x 32,81 ft x (13,12 / 13,46 ft)
(102,80 m / 100,00 m) x 10,00 m x (4,00 / 4,10 m)

Armament:
4 - 4,72" / 120 mm 50,0 cal guns - 55,82lbs / 25,32kg shells, 150 per gun
Quick firing guns in deck and hoist mounts, 1941 Model
4 x Single mounts on centreline ends, evenly spread
2 raised mounts - superfiring
12 - 1,57" / 40,0 mm 60,0 cal guns - 2,14lbs / 0,97kg shells, 150 per gun
Anti-air guns in deck mounts, 1936 Model
6 x Twin mounts on sides, evenly spread
4 raised mounts
Weight of broadside 249 lbs / 113 kg
Main Torpedoes
8 - 21,0" / 533 mm, 26,25 ft / 8,00 m torpedoes - 1,754 t each, 14,032 t total
In 2 sets of deck mounted centre rotating tubes
Main DC/AS Mortars
2 - 231,49 lbs / 105,00 kg Depth Charges + 20 reloads - 2,274 t total
in Depth charge throwers
2nd DC/AS Mortars
2 - 231,49 lbs / 105,00 kg Depth Charges + 20 reloads - 2,274 t total
in Stern depth charge racks

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0,98" / 25 mm 0,39" / 10 mm 0,98" / 25 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 87 150 shp / 65 014 Kw = 37,00 kts
Range 2 000nm at 14,00 kts
Bunker at max displacement = 160 tons

Complement:
160 - 209

Cost:
£1,889 million / $7,557 million

Distribution of weights at normal displacement:
Armament: 109 tons, 4,9 %
- Guns: 74 tons, 3,4 %
- Weapons: 34 tons, 1,6 %
Armour: 13 tons, 0,6 %
- Armament: 13 tons, 0,6 %
Machinery: 1 484 tons, 67,1 %
Hull, fittings & equipment: 452 tons, 20,4 %
Fuel, ammunition & stores: 154 tons, 7,0 %
Miscellaneous weights: 0 tons, 0,0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
255 lbs / 116 Kg = 4,8 x 4,7 " / 120 mm shells or 0,1 torpedoes
Stability (Unstable if below 1.00): 1,02
Metacentric height 1,0 ft / 0,3 m
Roll period: 13,9 seconds
Steadiness - As gun platform (Average = 50 %): 41 %
- Recoil effect (Restricted arc if above 1.00): 0,50
Seaboat quality (Average = 1.00): 0,33

Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0,548 / 0,552
Length to Beam Ratio: 10,00 : 1
'Natural speed' for length: 18,11 kts
Power going to wave formation at top speed: 77 %
Trim (Max stability = 0, Max steadiness = 100): 100
Bow angle (Positive = bow angles forward): 25,00 degrees
Stern overhang: 0,00 ft / 0,00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20,00 %, 19,69 ft / 6,00 m, 16,40 ft / 5,00 m
- Forward deck: 30,00 %, 16,40 ft / 5,00 m, 13,12 ft / 4,00 m
- Aft deck: 35,00 %, 13,12 ft / 4,00 m, 9,84 ft / 3,00 m
- Quarter deck: 15,00 %, 9,84 ft / 3,00 m, 7,87 ft / 2,40 m
- Average freeboard: 13,32 ft / 4,06 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 226,7 %
- Above water (accommodation/working, high = better): 88,0 %
Waterplane Area: 7 498 Square feet or 697 Square metres
Displacement factor (Displacement / loading): 45 %
Structure weight / hull surface area: 35 lbs/sq ft or 173 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,47
- Longitudinal: 1,35
- Overall: 0,52
Extremely poor machinery, storage, compartmentation space
Cramped accommodation and workspace room
Caution: Lacks seaworthiness - very limited seakeeping ability

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klagldsf
Post subject: Re: Imperial Swedish NavyPosted: January 6th, 2012, 9:23 pm
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smart-looking destroyer


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Gollevainen
Post subject: Re: Imperial Swedish NavyPosted: January 6th, 2012, 9:36 pm
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nice desing, but 87 000 shp seems kinda exessive for such mediocore sized vessel... most of its peers mounted about half of that power

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klagldsf
Post subject: Re: Imperial Swedish NavyPosted: January 6th, 2012, 10:37 pm
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Yeah, and you're not going to see a proportionate increase in speed, either. Maybe a few knots at best.


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Psilander
Post subject: Re: Imperial Swedish NavyPosted: January 7th, 2012, 9:30 am
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Its a SpringSharp thing - I modeled her after the IRL Townclass with 38000shp - 39kts. She is a bit bigger but should have about the same amount of SHP, but then she does only around 30kts.

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Hood
Post subject: Re: Imperial Swedish NavyPosted: January 7th, 2012, 10:11 am
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That is the main problem with Springsharp, it doesn't sim destroyers well at all.

The Bielke is very novel, more like a mini-CL than a destroyer but certainly packs a punch. Would there be room for triple turrets in that hull without making it quite fat and consequently losing speed?

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Psilander
Post subject: Re: Imperial Swedish NavyPosted: January 8th, 2012, 8:14 pm
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Hmm....yea, she is a bit fat, but not terribly.
I wasn't happy with her bridge so I redesigned it, to a more sleek one.

[ img ]

I imagine she can cause some trouble especially to japanese destroyers during torpedo attacks when she can open fire at much longer range than a normal DD. She carriers the 152mm m/34 L55 which has the IRL range record in Swedish naval gunnery @ 34km!!

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SrGopher
Post subject: Re: Imperial Swedish NavyPosted: January 8th, 2012, 9:18 pm
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Its still a very handsome ship!

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