New Experimental Light Cruiser

[TexanCowboy]

In effect, you're working on the level of AS warfare, but with rockets propelling a small depth charge that explodes shallow.(the pressure vessel is a tiny depth charge)

1916: hydrophones, depth charge throwers

But I'm afraid you'll have to develop the 1910 level first.
1910: ASW tactics, depth charges

Ouch. Forgot about tech. In that case, I can only use the short range one. It has a range of 300 meters,and it is aimed underwater, very shallow. It explodes on impact or upon a timed fuse.

[Korpen]

The issue of tech aside, the largest problem I see with any active torpedo defence is that to be able to deploy it one need to spot a torpedo at fairly long range, something that simply is not realistic under most circumstances. If one somehow DO spot it at long range, it is usually just as easy to change course to avoid it IMO.

[maddox]

100 kg of charge on a black powder rocket????  Wow, that will be a monster.  Forget the torpedo tube. You'll need something lager.

Korpen, You're spot on. Shooting something is only doable if you know where it is.  And then a fast moving target with something fickle like a black ppowder rocket?

[TexanCowboy]

Modified to have mines and armour.

Korpen, this is a short range(300 meter or less system) This is intended both as a prototype and a last resort system.

Maddox, how many kgs can I fit into a rocket. I was assuming 100 kg, as thats my torpedo load. The rocket also runs on gun cotten, as its more effecient)

Racheta , Romania Expiermental Cruiser laid down 1917 (Engine 1909)

Displacement:
   2,535 t light; 2,660 t standard; 3,273 t normal; 3,763 t full load

Dimensions: Length overall / water x beam x draught
   350.00 ft / 350.00 ft x 35.00 ft x 17.00 ft (normal load)
   106.68 m / 106.68 m x 10.67 m  x 5.18 m

Armament:
     4 - 4.70" / 119 mm guns in single mounts, 51.91lbs / 23.55kg shells, 1917 Model
     Quick firing guns in deck mounts with hoists
     on centreline ends, evenly spread
     8 - 4.70" / 119 mm guns in single mounts, 51.91lbs / 23.55kg shells, 1917 Model
     Quick firing guns in deck mounts with hoists
     on side, evenly spread
     2 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1917 Model
     Anti-aircraft guns in deck mounts
     on centreline, evenly spread
     10 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1917 Model
     Anti-aircraft guns in deck mounts
     on side, evenly spread
   Weight of broadside 625 lbs / 283 kg
   Shells per gun, main battery: 150
   14 - 21.0" / 533.4 mm above water torpedoes

Armour:
  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   2.00" / 51 mm         -               -
   2nd:   2.00" / 51 mm         -               -

  - Armour deck: 1.00" / 25 mm, Conning tower: 3.00" / 76 mm

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 23,340 shp / 17,412 Kw = 26.00 kts
   Range 9,008nm at 12.00 kts
   Bunker at max displacement = 1,103 tons

Complement:
   216 - 281

Cost:
   £0.551 million / $2.202 million

Distribution of weights at normal displacement:
   Armament: 78 tons, 2.4 %
   Armour: 235 tons, 7.2 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 63 tons, 1.9 %
      - Armour Deck: 158 tons, 4.8 %
      - Conning Tower: 14 tons, 0.4 %
   Machinery: 1,061 tons, 32.4 %
   Hull, fittings & equipment: 1,037 tons, 31.7 %
   Fuel, ammunition & stores: 738 tons, 22.5 %
   Miscellaneous weights: 123 tons, 3.8 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2,017 lbs / 915 Kg = 38.9 x 4.7 " / 119 mm shells or 0.6 torpedoes
   Stability (Unstable if below 1.00): 1.05
   Metacentric height 1.1 ft / 0.3 m
   Roll period: 13.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 52 %
         - Recoil effect (Restricted arc if above 1.00): 0.79
   Seaboat quality  (Average = 1.00): 1.05

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.550
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 18.71 kts
   Power going to wave formation at top speed: 60 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   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:      20.58 ft / 6.27 m
      - Forecastle (20 %):   13.10 ft / 3.99 m
      - Mid (50 %):      13.10 ft / 3.99 m
      - Quarterdeck (15 %):   13.10 ft / 3.99 m
      - Stern:      13.10 ft / 3.99 m
      - Average freeboard:   13.70 ft / 4.18 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 127.8 %
      - Above water (accommodation/working, high = better): 21.0 %
   Waterplane Area: 8,549 Square feet or 794 Square metres
   Displacement factor (Displacement / loading): 105 %
   Structure weight / hull surface area: 63 lbs/sq ft or 309 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.91
      - Longitudinal: 2.17
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is extremely poor

4 tubes are Torpedo Tubes
Twin Mounts
1 reload per tube(8 tons)

Long Range Macroni(25 tons)

The ohter tubes are black-powder rocket tubes
6 of them are normal muilti-stage  "Fire-Dragon issuing from Water" rockets(China)
Maximum range of 5,000 yards

4 of them are a new single-stage anti-torpedo rocket, with a maximum range of 300 meters. The rocket is meant to either destroy the rocket or alter its course with the shockwave resulting from its explosion.It has a pressure vessel that allows the rocket down to 10 meters.

Assuming rockets are three to a ton, 17 rocket per tube.(46 tons)
2 rockets extra.

14 tons crew comfort/ Weight Reserve

30 tons mines(90)

[Walter]

Well as I see it you could use it, but it won't work until you have the proper ASW tech for it.

Funny that you're going for something like that. I had the urge this morning to create a picture of the Ki-9 with MAZIRs (Manchu Anti-Zeppelin Incendiary Rockets )... :)

(Albatros D.III with Le Prieur rockets)

[TexanCowboy]

Developing those....  :). Where's Tanthalas? I need his anti airship rockets.  :)

[ciders]

It's a French system, used against observation ballon and German airships.

See here

Or here

[TexanCowboy]

I know. Rohan's the only nation to develop it.

[maddox]

Black powder launched Depth Charges, not a bad idea in itself.

But carpet bombing a piece of sea with small charges to hit a torpedo, I myself have doubts. Nontheles, the moderators will discus it.

[TexanCowboy]

Well, since torpedos of this era ran shallow, they shouldn't be hard to find. Also, does make a good storyline. Anti-mine, too.

[Walter]

It's a French system, used against observation ballon and German airships.

Yes. A system invented by Lieutenant Yves Paul Gaston Le Prieur who also happened to be the man who was partially responsible for the first human flight in Japan back in 1909.

I deliberatly used the word "Zeppelin" in there instead of "Airship" or "Balloon" because MAZIR sounds a lot better than MAAIR or MABIR...

[Guinness]

What does a rocket-based torpedo defense system get you compared to say anti-torpedo nets?

[TexanCowboy]

As Foxy would say, funner  :). Besides, it can protect other ships, and torpedo nets can be puctured by knife blade torpedoes.

[Sachmle]

I think the whole thing has merit, but honestly in practice I think you'll find it lacking against torpedoes. May be successful against mines or subs though. Sorta Black powder/gun cotton Squid or Hedgehog. Little early tech wise, but definitely something that could prove useful later on.

[Walter]

What does a rocket-based torpedo defense system get you compared to say anti-torpedo nets?

It get you a better chance of being hit by a torpedo. :)

Personally I think that the anti torpedo nets look a lot cooler and give you better protection then such unreliable rockets. :)