GTB-1916

[Borys]

Same problem as France then, nothing between the 105 and the 140mm.

Tee-hee - makes me feel smug over developing 4,5"/50lbs and 5,3"/75 lbs guns :D
However, there is NOTHING wrong with c.4"/35lbs guns on destroyers ...
Borys

[The Rock Doctor]

Four inch was pretty much the historical standard of the time; personally, I'm happy with them as TB/DD main guns for now.

[Guinness]

105mm guns should still be just fine (IMHO). Something along the lines of 120mm will be worthwhile in the future, so I'd suggest going ahead and developing it or buying it, etc. but for this design, I think the 105's are plenty.

To me, it's always a better choice to mount enough guns, even of lesser caliber, than accepting only say 2 of a larger caliber. I just don't think you'd hit anything with the smaller numbers (never mind rate of fire concerns, etc.)

[Valles]

When refit time comes (It's actually due 1917), I'm going to be rearming my older destroyers from single 150s to 100 twins.

Might reengine the 1909-drive boats, haven't calculated that yet.

[Sachmle]

Completely forgot to post the actual DD being laid down, with all the gun size talk. Anyway, here it is:

GTB-1916, Deutscher Kaiserreich Großestorpedobooten laid down 1916

Displacement:
   1,000 t light; 1,032 t standard; 1,161 t normal; 1,265 t full load

Dimensions: Length overall / water x beam x draught
   323.64 ft / 319.55 ft x 26.64 ft x 9.84 ft (normal load)
   98.65 m / 97.40 m x 8.12 m  x 3.00 m

Armament:
      3 - 4.13" / 105 mm guns in single mounts, 33.07lbs / 15.00kg shells, 1916 Model
     Quick firing guns in deck mounts
     on centreline, evenly spread
     Aft Main mounts separated by engine room
      2 - 1.46" / 37.0 mm guns in single mounts, 1.55lbs / 0.70kg shells, 1916 Model
     Anti-aircraft guns in deck mounts
     on side, all amidships
      2 - 0.30" / 7.7 mm guns in single mounts, 0.01lbs / 0.00kg shells, 1916 Model
     Machine guns in deck mounts
     on side, evenly spread, all raised mounts
   Weight of broadside 102 lbs / 46 kg
   Shells per gun, main battery: 150
   6 - 19.7" / 500 mm above water torpedoes

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.79" / 20 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 32,000 shp / 23,872 Kw = 32.83 kts
   Trial Speed = 33.89 kts
   Range 7,000nm at 10.00 kts
   Bunker at max displacement = 233 tons

Complement:
   99 - 129

Cost:
   £0.227 million / $0.907 million

Distribution of weights at normal displacement:
   Armament: 14 tons, 1.2 %
   Armour: 5 tons, 0.5 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 5 tons, 0.5 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 658 tons, 56.7 %
   Hull, fittings & equipment: 305 tons, 26.3 %
   Fuel, ammunition & stores: 161 tons, 13.9 %
   Miscellaneous weights: 17 tons, 1.5 %
       - 12t = 6 2t 50cm Torpedoes
       - 5t = 15 DCs plus rail

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     254 lbs / 115 Kg = 7.2 x 4.1 " / 105 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.24
   Metacentric height 1.0 ft / 0.3 m
   Roll period: 11.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.18
   Seaboat quality  (Average = 1.00): 0.89

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.485
   Length to Beam Ratio: 12.00 : 1
   'Natural speed' for length: 17.88 kts
   Power going to wave formation at top speed: 69 %
   Trim (Max stability = 0, Max steadiness = 100): 79
   Bow angle (Positive = bow angles forward): 14.00 degrees
   Stern overhang: -6.56 ft / -2.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      16.40 ft / 5.00 m
      - Forecastle (20 %):   16.40 ft / 5.00 m
      - Mid (50 %):      16.40 ft / 5.00 m (8.20 ft / 2.50 m aft of break)
      - Quarterdeck (15 %):   8.20 ft / 2.50 m
      - Stern:      8.20 ft / 2.50 m
      - Average freeboard:   12.30 ft / 3.75 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 193.5 %
      - Above water (accommodation/working, high = better): 74.0 %
   Waterplane Area: 5,596 Square feet or 520 Square metres
   Displacement factor (Displacement / loading): 46 %
   Structure weight / hull surface area: 26 lbs/sq ft or 129 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.53
      - Overall: 0.55
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped
   Ship has slow, easy roll, a good, steady gun platform
   Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

[Borys]

Looks good.
Enormous range!
Borys

[Guinness]

bah! the new 1500t CSA "Scouts" will do 7000 nm at 12 knots.  :P

[Sachmle]

Looks good.
Enormous range!
Borys

bah! the new 1500t CSA "Scouts" will do 7000 nm at 12 knots.  :P

Good, you've both mastered SARCASM well.  ;D

Yes, it's only 291nm @ full speed. I had to sacrifice something.