You are not logged in.

21

Monday, May 12th 2014, 3:30pm

Rocky may have a point, there. I'd be interested to see if there's anything historical which had a similar beam and centerline torpedoes.

22

Monday, May 12th 2014, 3:49pm

Rocky may have a point, there. I'd be interested to see if there's anything historical which had a similar beam and centerline torpedoes.

I have checked the larger sort of destroyers (Sumner, Shimakaze, Akitsuki) and find that they are considerably more narrow in the beam. Changing it to two triples on the beam makes very little difference in the design parameters, so no harm, no fault, I think.

------

Wiesbaden, German Air Defence Destroyer laid down 1945 (Rev C)

Displacement:
3,820 t light; 4,103 t standard; 4,603 t normal; 5,003 t full load

Dimensions: Length overall / water x beam x draught
466.99 ft / 459.32 ft x 45.93 ft x 15.58 ft (normal load)
142.34 m / 140.00 m x 14.00 m x 4.75 m

Armament:
8 - 5.04" / 128 mm guns (4x2 guns), 63.99lbs / 29.03kg shells, 1945 Model
Automatic rapid fire guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
8 - 2.17" / 55.0 mm guns (4x2 guns), 5.08lbs / 2.30kg shells, 1945 Model
Anti-aircraft guns in deck mounts with hoists
on side, all amidships
4 - 0.79" / 20.0 mm guns (2x2 guns), 0.24lbs / 0.11kg shells, 1945 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 554 lbs / 251 kg
Shells per gun, main battery: 600
6 - 21.0" / 533 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.98" / 25 mm 0.98" / 25 mm
2nd: 0.59" / 15 mm 0.59" / 15 mm -
3rd: 0.39" / 10 mm - -

- Conning tower: 1.97" / 50 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 49,754 shp / 37,116 Kw = 32.00 kts
Range 7,500nm at 15.00 kts
Bunker at max displacement = 900 tons

Complement:
279 - 363

Cost:
£2.615 million / $10.459 million

Distribution of weights at normal displacement:
Armament: 82 tons, 1.8 %
Armour: 47 tons, 1.0 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 35 tons, 0.8 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 12 tons, 0.3 %
Machinery: 1,256 tons, 27.3 %
Hull, fittings & equipment: 2,254 tons, 49.0 %
Fuel, ammunition & stores: 783 tons, 17.0 %
Miscellaneous weights: 180 tons, 3.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
6,096 lbs / 2,765 Kg = 95.3 x 5.0 " / 128 mm shells or 1.0 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 2.0 ft / 0.6 m
Roll period: 13.6 seconds
Steadiness - As gun platform (Average = 50 %): 62 %
- Recoil effect (Restricted arc if above 1.00): 0.52
Seaboat quality (Average = 1.00): 1.62

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.490
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 24.49 kts
Power going to wave formation at top speed: 62 %
Trim (Max stability = 0, Max steadiness = 100): 38
Bow angle (Positive = bow angles forward): 18.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 23.62 ft / 7.20 m
- Forecastle (20 %): 22.80 ft / 6.95 m
- Mid (50 %): 21.98 ft / 6.70 m
- Quarterdeck (15 %): 21.98 ft / 6.70 m
- Stern: 21.98 ft / 6.70 m
- Average freeboard: 22.33 ft / 6.81 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 109.9 %
- Above water (accommodation/working, high = better): 176.3 %
Waterplane Area: 14,483 Square feet or 1,345 Square metres
Displacement factor (Displacement / loading): 136 %
Structure weight / hull surface area: 75 lbs/sq ft or 368 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.85
- Longitudinal: 4.27
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Breakdown of miscellaneous weight:

Reserved for air search radars: 30 tons
Reserved for surface search radars: 20 tons
Reserved for director radars: 20 tons
Reserved for A/S detection equipment: 30 tons
Reserved for A/S standoff weapon: 50 tons
Reserved for future requirements: 30 tons

23

Monday, May 12th 2014, 4:06pm

I'm not a centreline torpedo carriage would work on that much beam. Maybe you'd want a more cruiser-ish torpedo layout?

I would further ask if torpedo are even worth it on a dedicated Air-Defense design. Could the space freed up by there omition not be better used for ether more AA guns and electronics or better arrangement of the current ones for her primary mission?
You smug-faced crowds with kindling eye
Who cheer when soldier lads march by,
Sneak home and pray you'll never know
The hell where youth and laughter go.
-Siegfried Sassoon

24

Monday, May 12th 2014, 4:11pm

You could make a similar argument for the ASW weaponry and equipment.

That said, I think I'd keep both torpedoes and ASW equipment, simply because I don't tailor my ships to only do one very narrow role, but to do one primary role and several secondary roles.

25

Monday, May 12th 2014, 4:26pm

I'm not a centreline torpedo carriage would work on that much beam. Maybe you'd want a more cruiser-ish torpedo layout?
I would further ask if torpedo are even worth it on a dedicated Air-Defense design. Could the space freed up by there omition not be better used for ether more AA guns and electronics or better arrangement of the current ones for her primary mission?


To which Brock answered,

Quoted

[You could make a similar argument for the ASW weaponry and equipment.

That said, I think I'd keep both torpedoes and ASW equipment, simply because I don't tailor my ships to only do one very narrow role, but to do one primary role and several secondary roles.
Precisely - while air defense is the primary role of these vessels, to leave them devoid of other options would be short-sighted.

26

Monday, May 12th 2014, 5:00pm

Makes total sense, just felt it was a question worthy of asking given the implied specialization over a typical destroyer.
You smug-faced crowds with kindling eye
Who cheer when soldier lads march by,
Sneak home and pray you'll never know
The hell where youth and laughter go.
-Siegfried Sassoon

27

Tuesday, May 13th 2014, 9:56am

I think if you hadn't fitted torpedoes then I would have said a 140m long 32kt ship with that kind of armament would be a CLAA. I think its still pretty big for a destroyer, will it be as manoeuvrable as a destroyer? Would you not want more speed to have some margin over the ships you are escorting? Of course the danger with a CLAA is to overcook things, adding an extra mount or two, splinter protection, range and then your even bigger and spending even more.

With torpedoes and ASW gear its a dual-purpose ship but its pretty expensive and I doubt more than a flotilla's worth is likely.