You are not logged in.

1

Thursday, March 30th 2006, 4:34am

Admirality "S" class Destroyers

Im trying to sim using SS2 the British Admirality S destroyers, but Im having no luck. Anyone have any ideas? I need at leaste a rough idea because I want to refit them. Here are their specs:


Dimensions 265 (p.p.) 275-277 (o.a.) x 26.66 x 9 feet(mean) draught. 1075 tons
Guns: 3-4 inch (Mk. IV with 30° elevation), 1-2 pdr. pom-pom. Tubes, 4-21 inch in pairs.
Machinery : Turbines (all-geared type). Brown Curtis (A.G.) in all except following:-Palmer boats, Parson. (A.G.) ; Tilbury, Tintagel, Parsons (A.G.). Designed S.H.P. 27,000 = 36 kts. 2 screws. Yarrow boilers in all, except White boats with White-Forster. Oil: about :300/250 tons.
Complement, 90.

From: Jane's Fighting Ships for 1919


2

Thursday, March 30th 2006, 4:44am

Can you post one of your sims so we can at least get a sense of where the trouble is?

3

Thursday, March 30th 2006, 4:16pm

Here she is, First she is lighter than she should be. Also I had to leave some stuff out. And Im not sure if I missed anything.


Admitality "S", Great Britain Destroyer laid down 1919

Displacement:
790 t light; 817 t standard; 920 t normal; 1,002 t full load

Dimensions: Length overall / water x beam x draught
265.00 ft / 265.00 ft x 27.00 ft x 9.00 ft (normal load)
80.77 m / 80.77 m x 8.23 m x 2.74 m

Armament:
3 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1919 Model
Breech loading guns in deck mounts
on centreline, evenly spread
Aft Main mounts separated by engine room
1 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.89kg shells, 1919 Model
Anti-aircraft gun in deck mount
on centreline
Weight of broadside 98 lbs / 44 kg
Shells per gun, main battery: 150
4 - 21.0" / 533.4 mm above water torpedoes

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 27,551 shp / 20,553 Kw = 33.00 kts
Range 3,000nm at 15.00 kts
Bunker at max displacement = 185 tons

Complement:
83 - 108

Cost:
£0.238 million / $0.952 million

Distribution of weights at normal displacement:
Armament: 12 tons, 1.3 %
Machinery: 508 tons, 55.2 %
Hull, fittings & equipment: 270 tons, 29.4 %
Fuel, ammunition & stores: 130 tons, 14.1 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
255 lbs / 116 Kg = 8.0 x 4.0 " / 102 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.34
Metacentric height 1.2 ft / 0.4 m
Roll period: 10.4 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.16
Seaboat quality (Average = 1.00): 0.79

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.500
Length to Beam Ratio: 9.81 : 1
'Natural speed' for length: 18.60 kts
Power going to wave formation at top speed: 75 %
Trim (Max stability = 0, Max steadiness = 100): 64
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 20.00 ft / 6.10 m
- Forecastle (20 %): 15.00 ft / 4.57 m
- Mid (50 %): 15.00 ft / 4.57 m (12.00 ft / 3.66 m aft of break)
- Quarterdeck (15 %): 12.00 ft / 3.66 m
- Stern: 12.00 ft / 3.66 m
- Average freeboard: 13.90 ft / 4.24 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 188.3 %
- Above water (accommodation/working, high = better): 93.6 %
Waterplane Area: 4,958 Square feet or 461 Square metres
Displacement factor (Displacement / loading): 45 %
Structure weight / hull surface area: 25 lbs/sq ft or 123 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.46
- Longitudinal: 3.22
- Overall: 0.55
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

HoOmAn

Keeper of the Sacred Block Coefficient

  • Send private message

4

Thursday, March 30th 2006, 4:27pm

Transome stern on a 1919er design? Is this correct?

5

Thursday, March 30th 2006, 4:45pm

Putting a transom on, even though ahistorical, is the only way he's got a prayer of getting close to the real ships top speed in SS. Even with it he's 3 knots slow on the same SHP.

6

Thursday, March 30th 2006, 5:08pm

http://warships.web4u.cz/lode.php?langua…DD&trida=S+1917

That looks like the same ship - though the site only quotes a speed of 32.5 knots. The sketch is interesting, as it suggests to me that you've got more freeboard than historical, which won't help the hull strength.

Agreed, the displacement is much lighter than historically indicated - so's your bunkerage.

Oddly, I can plug similar data into springstyle and get a very happy little tincan out of it (seaboat rating not withstanding). Maybe - since we're not talking about a battleship here - you need to just tinker with the dimensions some and create a ~1000 t destroyer with 33 knots and 3 guns that does work for you.

7

Tuesday, April 11th 2006, 7:12am

How does this look?


Enter ship name, Enter country Enter ship type laid down 1919

Displacement:
957 t light; 994 t standard; 1,188 t normal; 1,344 t full load

Dimensions: Length overall / water x beam x draught
295.00 ft / 295.00 ft x 30.00 ft x 10.00 ft (normal load)
89.92 m / 89.92 m x 9.14 m x 3.05 m

Armament:
3 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1919 Model
Quick firing guns in deck mounts
on centreline ends, majority forward
1 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.89kg shells, 1919 Model
Anti-aircraft gun in deck mount
on side amidships
Weight of broadside 98 lbs / 44 kg
Shells per gun, main battery: 250
4 - 21.0" / 533.4 mm above water torpedoes

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 27,825 shp / 20,757 Kw = 32.50 kts
Range 5,000nm at 15.00 kts
Bunker at max displacement = 350 tons

Complement:
100 - 131

Cost:
£0.293 million / $1.172 million

Distribution of weights at normal displacement:
Armament: 12 tons, 1.0 %
Machinery: 646 tons, 54.4 %
Hull, fittings & equipment: 298 tons, 25.1 %
Fuel, ammunition & stores: 232 tons, 19.5 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
340 lbs / 154 Kg = 10.6 x 4.0 " / 102 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.62
Metacentric height 1.8 ft / 0.6 m
Roll period: 9.3 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.09
Seaboat quality (Average = 1.00): 0.92

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.470
Length to Beam Ratio: 9.83 : 1
'Natural speed' for length: 19.70 kts
Power going to wave formation at top speed: 72 %
Trim (Max stability = 0, Max steadiness = 100): 56
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21.00 ft / 6.40 m
- Forecastle (20 %): 15.00 ft / 4.57 m
- Mid (50 %): 15.00 ft / 4.57 m (12.00 ft / 3.66 m aft of break)
- Quarterdeck (15 %): 12.00 ft / 3.66 m
- Stern: 12.00 ft / 3.66 m
- Average freeboard: 13.98 ft / 4.26 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 183.9 %
- Above water (accommodation/working, high = better): 104.7 %
Waterplane Area: 5,966 Square feet or 554 Square metres
Displacement factor (Displacement / loading): 57 %
Structure weight / hull surface area: 25 lbs/sq ft or 122 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.44
- Longitudinal: 2.14
- Overall: 0.52
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

8

Tuesday, April 11th 2006, 2:22pm

That cross-sectional hull strength needs to be 0.50 or better; reduce the ship's exceptional range somewhat and you should be okay.