Historic Torpedo Boat Attempt

[Carthaginian]

Ok, I've managed to get REALLY CLOSE to a true historic TB with this one. Nothing fancy here, she's just an engine with two twin 18" torpedo mounts on her. She only has a 105 mile endurance at top speed- which is still fairly typical of her 'type.' Her top speed is nothing to brag about, but SS does handicap this a little bit as we all know. She's about 10 years behind the times on that, with top-end engine tech. Still, She's the best approximation that I can make with SS.

Thought it might be a appropriate boat for some of our less-powerful NPC's to field,

Questions, Comments, Scathing Remarks?



Generic Torpedo Boat, laid down 1910 (Engine 1909)

Displacement:
   150 t light; 153 t standard; 166 t normal; 176 t full load

Dimensions: Length overall / water x beam x draught
   180.00 ft / 180.00 ft x 15.00 ft x 4.00 ft (normal load)
   54.86 m / 54.86 m x 4.57 m  x 1.22 m

Armament:
      4 - 0.50" / 12.7 mm guns (2x2 guns), 0.05lbs / 0.02kg shells, 1910 Model
     Machine guns in deck mounts
     on side, all forward, all raised mounts - superfiring
   Weight of broadside 0 lbs / 0 kg
   Shells per gun, main battery: 800
   4 - 18.0" / 457.2 mm above water torpedoes

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 1 shaft, 5,000 shp / 3,730 Kw = 26.04 kts
   Range 1,000nm at 12.17 kts
   Bunker at max displacement = 24 tons

Complement:
   23 - 30

Cost:
   £0.018 million / $0.073 million

Distribution of weights at normal displacement:
   Armament: 0 tons, 0.0 %
   Machinery: 93 tons, 56.0 %
   Hull, fittings & equipment: 53 tons, 31.7 %
   Fuel, ammunition & stores: 16 tons, 9.9 %
   Miscellaneous weights: 4 tons, 2.4 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     47 lbs / 21 Kg = 751.5 x 0.5 " / 13 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.06
   Metacentric height 0.3 ft / 0.1 m
   Roll period: 11.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 51 %
         - Recoil effect (Restricted arc if above 1.00): 0.00
   Seaboat quality  (Average = 1.00): 0.72

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.538
   Length to Beam Ratio: 12.00 : 1
   'Natural speed' for length: 13.42 kts
   Power going to wave formation at top speed: 71 %
   Trim (Max stability = 0, Max steadiness = 100): 70
   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:      9.00 ft / 2.74 m
      - Forecastle (25 %):   8.00 ft / 2.44 m
      - Mid (50 %):      7.00 ft / 2.13 m
      - Quarterdeck (25 %):   7.00 ft / 2.13 m
      - Stern:      6.00 ft / 1.83 m
      - Average freeboard:   7.35 ft / 2.24 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 183.5 %
      - Above water (accommodation/working, high = better): 27.1 %
   Waterplane Area: 1,803 Square feet or 168 Square metres
   Displacement factor (Displacement / loading): 36 %
   Structure weight / hull surface area: 14 lbs/sq ft or 69 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.82
      - Overall: 0.57
   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

[Borys]

IMO a god approximation of RL boats.
Borys

[Korpen]

Cute little ship!  :D
What historic design did you base her on? :)

And i am trying to restrain myself from suggesting mouting one tube fixed on the stern (to allow on attack while approching and one when turning away)...

[P3D]

Too many torpedoes (I know current rules allows it...). I'd also suggest a 'traditional' torpedoboat bow (to keep water off the bridge). Draft should also be a bit deeper.

[Carthaginian]

Korpen:

I based her on a mix of various design characteristics found on TB's of the time. Mostly, I based her vaguely off this ship. I just put spray-shielding around the bridge and lowered the deck as I went aft to gain a touch of strength.
http://www.warshipsww2.eu/lode.php?language=E&period=&idtrida=388

Her size is a bit bigger than the ship in question, and she mounts all four fish above decks rather than the 2-1 above and 1 below that this little jewel has. My interior space is cramped enough (Springsharp LIES!) as it is. Since the aft mount can rotate 180 degrees, it can still fire over the stern quarter as you turn away, so I decided that a fixed tube aft wasn't necessary.

Too many torpedoes (I know current rules allows it...). I'd also suggest a 'traditional' torpedoboat bow (to keep water off the bridge). Draft should also be a bit deeper.

Not too many torpedoes. Look at the ship I was inspired by, it carried 4 torpedoes of 18" size; so did many other torpedo boats of the tech level we are at. It's perfectly historical in the amount of weapons carried. I only moved them all to the deck rather than eat up crew space by placing one below decks.

Also, there's NO WAY to sim a historic TB design 'historically' in this sim unless you relax BC restrictions to allow for less than .400 BC's, because historic TB's almost NEVER had these. This is- as I said- THE CLOSEST I CAN GET WITHIN THE RULES. Take it for what it's worth or leave it.

The bow is the same as on the ship that inspired me. Anything less kills the little bit of seakeeping I was able to eek out of the design.

[P3D]

I based her on a mix of various design characteristics found on TB's of the time. Mostly, I based her vaguely off this ship. I just put spray-shielding around the bridge and lowered the deck as I went aft to gain a touch of strength.
http://www.warshipsww2.eu/lode.php?language=E&period=&idtrida=388

Her size is a bit bigger than the ship in question, and she mounts all four fish above decks rather than the 2-1 above and 1 below that this little jewel has. My interior space is cramped enough (Springsharp LIES!) as it is. Since the aft mount can rotate 180 degrees, it can still fire over the stern quarter as you turn away, so I decided that a fixed tube aft wasn't necessary.

Hm, indeed. But the draft is still too deep :P
I am personally waiting for the new SS3 beta, hopefully that will be able to sim TBs and DDs.

[Carthaginian]

I based her on a mix of various design characteristics found on TB's of the time. Mostly, I based her vaguely off this ship. I just put spray-shielding around the bridge and lowered the deck as I went aft to gain a touch of strength.
http://www.warshipsww2.eu/lode.php?language=E&period=&idtrida=388

Her size is a bit bigger than the ship in question, and she mounts all four fish above decks rather than the 2-1 above and 1 below that this little jewel has. My interior space is cramped enough (Springsharp LIES!) as it is. Since the aft mount can rotate 180 degrees, it can still fire over the stern quarter as you turn away, so I decided that a fixed tube aft wasn't necessary.

Hm, indeed. But the draft is still too deep :P
I am personally waiting for the new SS3 beta, hopefully that will be able to sim TBs and DDs.

Uhm... not deep enough, you mean? :)

I know, and since we're having to operate within a system that has flawed- but finite, definite and useful- rules, I worked within those rules to make the most accurate representation of a turn-of-the-century TB that I could. I don't think it's too bad. I haven't tried simming something like this in SS3... is the new program for better small craft enabled yet, or still in the works?

[P3D]

Eh, not too deep. :-[
Still in the works AFAIK.

[ledeper]

i have tried to do the Acheron Class destroyers from 1910 with ss3 (Downloadable on SpringSharp .com),see new ships section ss3 trials

[P3D]

Acheron class had like 16-18' hull depth not 23'. Problem with destroyer designs is that reliable freeboard figures are hard to obtain, and that has a great influence on hull strength.

It sims more or less fine because of the relatively low speed.

[Carthaginian]

I generally guess freeboard by men or guns on the deck. A gun won't be mounted more than about 4 feet high, because that's the most efficient height for the man loading to work at; likewise, a 5'6"-6" man on deck can be used to judge the distance to the waterline.