New Zion Torpedo Boats

[Desertfox]

You can stuff quite a bit in 120 tons. This design will form the oceangoing torpedoboat fleet of New Zion.


Seekan (Knife), New Zion Torpedo Boat laid down 1912

Displacement:
   120 t light; 126 t standard; 133 t normal; 138 t full load

Dimensions: Length overall / water x beam x draught
   170.00 ft / 170.00 ft x 15.00 ft x 4.50 ft (normal load)
   51.82 m / 51.82 m x 4.57 m  x 1.37 m

Armament:
      1 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1912 Model
     Breech loading gun in deck mount
     on centreline forward
      3 - 1.97" / 50.0 mm guns (1x3 guns), 3.81lbs / 1.73kg shells, 1912 Model
     Quick firing guns in deck mount
     on centreline aft
      4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1912 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 25 lbs / 11 kg
   Shells per gun, main battery: 220
   4 - 18.0" / 457.2 mm above water torpedoes

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 1 shaft, 3,464 shp / 2,584 Kw = 25.00 kts
   Range 1,000nm at 10.00 kts
   Bunker at max displacement = 11 tons

Complement:
   19 - 25

Cost:
   £0.016 million / $0.065 million

Distribution of weights at normal displacement:
   Armament: 3 tons, 2.4 %
   Machinery: 66 tons, 50.0 %
   Hull, fittings & equipment: 46 tons, 35.0 %
   Fuel, ammunition & stores: 13 tons, 9.6 %
   Miscellaneous weights: 4 tons, 3.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     37 lbs / 17 Kg = 2.7 x 3.0 " / 76 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.12
   Metacentric height 0.4 ft / 0.1 m
   Roll period: 10.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.27
   Seaboat quality  (Average = 1.00): 0.90

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.405
   Length to Beam Ratio: 11.33 : 1
   'Natural speed' for length: 13.04 kts
   Power going to wave formation at top speed: 67 %
   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:      12.00 ft / 3.66 m
      - Forecastle (22 %):   7.00 ft / 2.13 m
      - Mid (50 %):      7.00 ft / 2.13 m
      - Quarterdeck (10 %):   5.50 ft / 1.68 m
      - Stern:      5.50 ft / 1.68 m
      - Average freeboard:   6.99 ft / 2.13 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 184.1 %
      - Above water (accommodation/working, high = better): 20.2 %
   Waterplane Area: 1,490 Square feet or 138 Square metres
   Displacement factor (Displacement / loading): 43 %
   Structure weight / hull surface area: 15 lbs/sq ft or 71 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 2.03
      - Overall: 0.58
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is extremely poor
   Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

[Desertfox]

I forgot I had another. This one will serve as a scout and leader to the previous ships. With the majority of DKB destroyers mounting a relatively light main armament this ship is sufficiently heavily armed to counter them.

Seekan II,  New Zion Destroyer laid down 1912

Displacement:
   240 t light; 252 t standard; 266 t normal; 277 t full load

Dimensions: Length overall / water x beam x draught
   220.00 ft / 220.00 ft x 19.00 ft x 5.50 ft (normal load)
   67.06 m / 67.06 m x 5.79 m  x 1.68 m

Armament:
      3 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1912 Model
     Breech loading guns in deck mounts
     on centreline, evenly spread
     Aft Main mounts separated by engine room
      6 - 1.97" / 50.0 mm guns (2x3 guns), 3.81lbs / 1.73kg shells, 1912 Model
     Quick firing guns in deck mounts
     on side, all amidships
   Weight of broadside 63 lbs / 29 kg
   Shells per gun, main battery: 150
   4 - 18.0" / 457.2 mm above water torpedoes

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 6,442 shp / 4,806 Kw = 27.00 kts
   Range 1,500nm at 10.00 kts
   Bunker at max displacement = 26 tons

Complement:
   32 - 42

Cost:
   £0.033 million / $0.132 million

Distribution of weights at normal displacement:
   Armament: 8 tons, 3.0 %
   Machinery: 128 tons, 48.2 %
   Hull, fittings & equipment: 95 tons, 35.8 %
   Fuel, ammunition & stores: 26 tons, 9.7 %
   Miscellaneous weights: 9 tons, 3.4 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     81 lbs / 37 Kg = 6.0 x 3.0 " / 76 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.15
   Metacentric height 0.5 ft / 0.2 m
   Roll period: 10.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.38
   Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.405
   Length to Beam Ratio: 11.58 : 1
   'Natural speed' for length: 14.83 kts
   Power going to wave formation at top speed: 64 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   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:      14.00 ft / 4.27 m
      - Forecastle (20 %):   9.00 ft / 2.74 m
      - Mid (40 %):      9.00 ft / 2.74 m
      - Quarterdeck (15 %):   7.00 ft / 2.13 m
      - Stern:      7.00 ft / 2.13 m
      - Average freeboard:   8.65 ft / 2.64 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 182.3 %
      - Above water (accommodation/working, high = better): 65.8 %
   Waterplane Area: 2,581 Square feet or 240 Square metres
   Displacement factor (Displacement / loading): 45 %
   Structure weight / hull surface area: 18 lbs/sq ft or 90 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.79
      - Overall: 0.57
   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

[Borys]

Ahoj!
I'm not sure about the "oceangoing" part of the description ...
Borys

[Desertfox]

'Oceangoing' compared to the 15 ton MAS boats I will be building alongside... ;)

[Borys]

Ahoj!
In THAT context it is indeed appropriate :)
Borys

[The Rock Doctor]

Agreed with Borys on the "oceangoing" definition.

Seekan II - she'll be a very crowded little boat, but if it fits, it'll be a challenge for those DKB GTBs.  Is there wireless included?

[Desertfox]

Yes, 4 for the torps, 5 for the wireless. These ships will have to take over the scouting role for NZ.

I'm not sure if the 1st design is worth it. Slower,weaker, and short-legged, probably would be a better idea to build the 50 ton Turbinias instead.

[The Rock Doctor]

I think the Mods will have to lay out a tech tree for MAS-type craft before you'll want to go too far down that road.

[Desertfox]

Originaly to be a Gunboat, this design ends up as a torpedoboat leader for the Seekans, freeing up the Lavis for more important duties.


Kfir II, New Zion Torpedoboat Leader laid down 1912

Displacement:
   450 t light; 488 t standard; 525 t normal; 554 t full load

Dimensions: Length overall / water x beam x draught
   300.00 ft / 300.00 ft x 30.00 ft x 5.10 ft (normal load)
   91.44 m / 91.44 m x 9.14 m  x 1.55 m

Armament:
      3 - 5.00" / 127 mm guns in single mounts, 62.50lbs / 28.35kg shells, 1912 Model
     Breech loading guns in deck mounts
     on centreline ends, majority aft, 1 raised mount aft
      4 - 1.97" / 50.0 mm guns (2x2 guns), 3.81lbs / 1.73kg shells, 1912 Model
     Quick firing guns in deck mounts
     on side, evenly spread
      8 - 0.50" / 12.7 mm guns (4x2 guns), 0.06lbs / 0.03kg shells, 1912 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 203 lbs / 92 kg
   Shells per gun, main battery: 235
   4 - 20.0" / 508 mm above water torpedoes

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.50" / 13 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 8,783 shp / 6,552 Kw = 27.00 kts
   Range 1,000nm at 15.00 kts
   Bunker at max displacement = 65 tons

Complement:
   54 - 71

Cost:
   £0.067 million / $0.268 million

Distribution of weights at normal displacement:
   Armament: 25 tons, 4.8 %
   Armour: 4 tons, 0.8 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 4 tons, 0.8 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 214 tons, 40.8 %
   Hull, fittings & equipment: 197 tons, 37.6 %
   Fuel, ammunition & stores: 75 tons, 14.2 %
   Miscellaneous weights: 9 tons, 1.7 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     201 lbs / 91 Kg = 3.2 x 5.0 " / 127 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.26
   Metacentric height 1.3 ft / 0.4 m
   Roll period: 11.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.27
   Seaboat quality  (Average = 1.00): 0.90

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.400
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 17.32 kts
   Power going to wave formation at top speed: 57 %
   Trim (Max stability = 0, Max steadiness = 100): 78
   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:      17.00 ft / 5.18 m
      - Forecastle (25 %):   13.00 ft / 3.96 m
      - Mid (45 %):      13.00 ft / 3.96 m (7.50 ft / 2.29 m aft of break)
      - Quarterdeck (15 %):   7.50 ft / 2.29 m
      - Stern:      7.50 ft / 2.29 m
      - Average freeboard:   10.38 ft / 3.16 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 172.9 %
      - Above water (accommodation/working, high = better): 131.7 %
   Waterplane Area: 5,540 Square feet or 515 Square metres
   Displacement factor (Displacement / loading): 57 %
   Structure weight / hull surface area: 24 lbs/sq ft or 118 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 0.88
      - Overall: 0.53
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is excellent
   Ship has slow, easy roll, a good, steady gun platform
   Poor seaboat, wet and uncomfortable, reduced performance in heavy weather