New Destroyer to sink all these Hood/Lexington/Tigers

[Sachmle]

GTB-1921 Class, Deutsche Reich Großes Torpedobooten laid down 1921

Displacement:
   1,500 t light; 1,555 t standard; 1,836 t normal; 2,061 t full load

Dimensions: Length overall / water x beam x draught
   393.71 ft / 389.34 ft x 35.39 ft x 11.80 ft (normal load)
   120.00 m / 118.67 m x 10.79 m  x 3.60 m

Armament:
      4 - 4.72" / 120 mm guns in single mounts, 52.91lbs / 24.00kg shells, 1918 Model
     Quick firing guns in deck mounts
     on centreline ends, evenly spread, 2 raised mounts - superfiring
      2 - 1.46" / 37.0 mm guns in single mounts, 1.55lbs / 0.70kg shells, 1921 Model
     Anti-aircraft guns in deck mounts
     on side, all amidships, all raised mounts - superfiring
      4 - 0.59" / 15.0 mm guns in single mounts, 0.10lbs / 0.05kg shells, 1921 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 215 lbs / 98 kg
   Shells per gun, main battery: 150
   6 - 20.9" / 530 mm above water torpedoes

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.98" / 25 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 42,185 shp / 31,470 Kw = 33.92 kts
   Range 5,500nm at 15.00 kts
   Bunker at max displacement = 506 tons

Complement:
   139 - 182

Cost:
   £0.557 million / $2.229 million

Distribution of weights at normal displacement:
   Armament: 27 tons, 1.5 %
   Armour: 10 tons, 0.6 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 10 tons, 0.6 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 1,028 tons, 56.0 %
   Hull, fittings & equipment: 393 tons, 21.4 %
   Fuel, ammunition & stores: 336 tons, 18.3 %
   Miscellaneous weights: 42 tons, 2.3 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     366 lbs / 166 Kg = 7.0 x 4.7 " / 120 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.68
   Metacentric height 2.5 ft / 0.8 m
   Roll period: 9.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.09
   Seaboat quality  (Average = 1.00): 0.68

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.395
   Length to Beam Ratio: 11.00 : 1
   'Natural speed' for length: 19.73 kts
   Power going to wave formation at top speed: 63 %
   Trim (Max stability = 0, Max steadiness = 100): 74
   Bow angle (Positive = bow angles forward): 20.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      12.01 ft / 3.66 m
      - Forecastle (20 %):   11.02 ft / 3.36 m
      - Mid (50 %):      10.01 ft / 3.05 m
      - Quarterdeck (15 %):   9.02 ft / 2.75 m
      - Stern:      8.01 ft / 2.44 m
      - Average freeboard:   10.05 ft / 3.06 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 194.2 %
      - Above water (accommodation/working, high = better): 81.4 %
   Waterplane Area: 8,460 Square feet or 786 Square metres
   Displacement factor (Displacement / loading): 58 %
   Structure weight / hull surface area: 30 lbs/sq ft or 145 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 0.57
      - Overall: 0.50
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped
   Caution: Lacks seaworthiness - very limited seakeeping ability

25t Long Range Wireless *if still required, if not FC.
12t 6x2t 53cm Torpedoes
4t 12 DCs
Trial Speed 34.62kts

[miketr]

Hence why I build light cruisers and destroyers of my own.  ;)

A very pushed design with the BC and BxL ratio.

Michael

[Guinness]

A very pushed design with the BC and BxL ratio.

Agreed. This ship would be tender at the ends and probably a tad weak in certain regards. I think you could afford to decrease length and increase BC, and probably increase draft a little. You'll probably lose a little bit of speed in the process, but you might get a little strength you could put into SHP.

[snip]

All these Tigers? There is only one! (just goes to show how week my naval yards are for working big ships :'()

[Sachmle]

Hence why I build light cruisers and destroyers of my own.  ;)

A very pushed design with the BC and BxL ratio.

Michael

Well, the L/B is only 11:1, max is 12:1. As to the BC, it was 0.405 but it dropped as I cut some things. I suppose I could fatten the ship some. I don't know how much room it actually needs for it's kit, but 120m seemed nice an round. Maybe I'll draw it out and see if a shorter ship would work. Too bad I suck at overhead views. If only I knew someone who was good at them*cough* Guinness/Jefgte*cough*

[Jefgte]

Hood - Lex - Tiger --

Future Kings of the seabed

Built heavy DDs, more Submarines & more Minelayers to sink them !!!


Jef  ;)

Well if I bring my Hoods into waters where mines are likely to be an issue I better be sure to bring mine sweepers,  Subs well aslong as I stay above 12 knots in this time perod donot do prolonged shore bombardments and have DD to drive the Sub down Should take a miracle to get a good shoot at the Ship speeding by more then 4000 Yards/Meters away.

Barring being in the wrong place at the wrong time or in tight confined waters where it can be cornered by roughly half its own Tonnage in DD these ships should be OK.   But no ship exists in a vaccum but a decent TDS should allow these ships to take the Odd Torp or two and Mine and still get back to port for repairs.   The fear is that said Torp or Mine will slow the ship sufficently to allow someones 22Knt to 23 Knt Battle Ship(s) to catch it and force many of the Fisher design to battle with something they could normally avoid.

[P3D]

Take a a battle between a division of 12 1500t destroyers, and a single 14,000-18,000t cruiser, when the destroyers are ordered to attack and sink the cruiser. With around 4kts speed difference, there's not that much room for fancy maneuvering (trying to trap the cruiser between two squadrons). The destroyers would need more than an uncomfortable hour to get into shooting range (~12,000 yards or km, vs. 18,000), and should forget torpedoes until the cruiser is slowed down a bit from some miraculous hit.

[Sachmle]

If only I knew someone who was good at overhead views,*cough* Jefgte*cough*

;) Thank you Jef!