Miniture Torpedo Boats for Export

[TexanCowboy]

These boats are for export at the price of 5 per $1. They cost me $.11 and .5 BP to build. They can be carried on a torpedo boat tender, 4 to a boat, or 6 for the big ones.

Romania, Romania Minature Torpedo Boat laid down 1917

Displacement:
   54 t light; 55 t standard; 56 t normal; 56 t full load

Dimensions: Length overall / water x beam x draught
   95.61 ft / 90.00 ft x 9.00 ft x 6.00 ft (normal load)
   29.14 m / 27.43 m x 2.74 m  x 1.83 m

Armament:
      1 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1917 Model
     Machine gun in deck mount
     on centreline forward
      1 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1917 Model
     Anti-aircraft gun in deck mounts
     on centreline, all amidships
      1 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1917 Model
     Machine gun in deck mount
     on centreline aft
   Weight of broadside 1 lbs / 0 kg
   Shells per gun, main battery: 150
   2 - 18.0" / 457.2 mm above water torpedoes, 1 - 18.0" / 457.2 mm submerged torpedo tubes

Armour:
   - Conning tower: 1.00" / 25 mm

Machinery:
   Petrol Internal combustion generators plus batteries,
   Electric motors, 1 shaft, 3,148 shp / 2,348 Kw = 25.00 kts
   Range 100nm at 7.00 kts
   Bunker at max displacement = 1 tons
     Caution: Delicate, lightweight machinery

Complement:
   9 - 13

Cost:
   £0.012 million / $0.047 million

Distribution of weights at normal displacement:
   Armament: 0 tons, 0.1 %
   Armour: 0 tons, 0.6 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 0 tons, 0.0 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.6 %
   Machinery: 32 tons, 58.4 %
   Hull, fittings & equipment: 18 tons, 32.6 %
   Fuel, ammunition & stores: 2 tons, 2.9 %
   Miscellaneous weights: 3 tons, 5.4 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     3 lbs / 1 Kg = 6.2 x 1.0 " / 25 mm shells or 0.0 torpedoes
   Stability (Unstable if below 1.00): 1.00
   Metacentric height 0.1 ft / 0.0 m
   Roll period: 10.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 1 %
         - Recoil effect (Restricted arc if above 1.00): 0.02
   Seaboat quality  (Average = 1.00): 0.01

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.400
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 9.49 kts
   Power going to wave formation at top speed: 81 %
   Trim (Max stability = 0, Max steadiness = 100): 3
   Bow angle (Positive = bow angles forward): 5.00 degrees
   Stern overhang: 5.00 ft / 1.52 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      7.00 ft / 2.13 m
      - Forecastle (20 %):   4.50 ft / 1.37 m
      - Mid (50 %):      4.50 ft / 1.37 m
      - Quarterdeck (15 %):   4.50 ft / 1.37 m
      - Stern:      4.50 ft / 1.37 m
      - Average freeboard:   4.70 ft / 1.43 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 351.9 %
      - Above water (accommodation/working, high = better): -11.2 %
   Waterplane Area: 471 Square feet or 44 Square metres
   Displacement factor (Displacement / loading): 24 %
   Structure weight / hull surface area: 13 lbs/sq ft or 65 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.52
      - Longitudinal: 6.11
      - Overall: 0.67
   Hull space for machinery, storage, compartmentation is extremely poor
   Room for accommodation and workspaces is extremely poor
   Ship has quick, lively roll, not a steady gun platform
   Caution: Lacks seaworthiness - very limited seakeeping ability

3 tons for torpedoes.

[The Rock Doctor]

What's her range at maximum speed?

[The Rock Doctor]

Go to Springsharp and load up the design.  Change the cruise speed to 25 kts, and then adjust the range downward until your hull strength is the same as in the original report.

[TexanCowboy]

I mess with it and managed to keep it the exact same price while adding in a extra 500 nm of range at 8. I must have seriously underestimated this ship.

Export, Romania Torpedo Boat laid down 1917

Displacement:
   53 t light; 54 t standard; 56 t normal; 57 t full load

Dimensions: Length overall / water x beam x draught
   95.61 ft / 90.00 ft x 9.00 ft x 6.00 ft (normal load)
   29.14 m / 27.43 m x 2.74 m  x 1.83 m

Armament:
     1 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1917 Model
     Machine gun in deck mount
     on centreline forward
     1 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1917 Model
     Anti-aircraft gun in deck mount
     on centreline amidships
     1 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1917 Model
     Machine gun in deck mount
     on centreline aft
   Weight of broadside 1 lbs / 0 kg
   Shells per gun, main battery: 150
   2 - 18.0" / 457.2 mm above water torpedoes, 1 - 18.0" / 457.2 mm submerged torpedo tubes

Armour:
  - Conning tower: 1.00" / 25 mm

Machinery:
   Petrol Internal combustion generators plus batteries,
   Electric motors, 1 shaft, 3,148 shp / 2,348 Kw = 25.00 kts
   Range 600nm at 8.00 kts
   Bunker at max displacement = 2 tons
     Caution: Delicate, lightweight machinery

Complement:
   9 - 13

Cost:
   £0.012 million / $0.047 million

Distribution of weights at normal displacement:
   Armament: 0 tons, 0.1 %
   Armour: 0 tons, 0.6 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 0 tons, 0.0 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.6 %
   Machinery: 32 tons, 58.4 %
   Hull, fittings & equipment: 17 tons, 31.0 %
   Fuel, ammunition & stores: 2 tons, 4.5 %
   Miscellaneous weights: 3 tons, 5.4 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     3 lbs / 1 Kg = 6.0 x 1.0 " / 25 mm shells or 0.0 torpedoes
   Stability (Unstable if below 1.00): 1.02
   Metacentric height 0.1 ft / 0.0 m
   Roll period: 10.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 0 %
         - Recoil effect (Restricted arc if above 1.00): 0.02
   Seaboat quality  (Average = 1.00): 0.00

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.400
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 9.49 kts
   Power going to wave formation at top speed: 81 %
   Trim (Max stability = 0, Max steadiness = 100): 0
   Bow angle (Positive = bow angles forward): 5.00 degrees
   Stern overhang: 5.00 ft / 1.52 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      7.00 ft / 2.13 m
      - Forecastle (20 %):   4.50 ft / 1.37 m
      - Mid (50 %):      4.50 ft / 1.37 m
      - Quarterdeck (15 %):   4.50 ft / 1.37 m
      - Stern:      4.50 ft / 1.37 m
      - Average freeboard:   4.70 ft / 1.43 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 351.9 %
      - Above water (accommodation/working, high = better): -11.2 %
   Waterplane Area: 471 Square feet or 44 Square metres
   Displacement factor (Displacement / loading): 24 %
   Structure weight / hull surface area: 13 lbs/sq ft or 62 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 5.80
      - Overall: 0.64
   Hull space for machinery, storage, compartmentation is extremely poor
   Room for accommodation and workspaces is extremely poor
   Ship has quick, lively roll, not a steady gun platform
   Caution: Lacks seaworthiness - very limited seakeeping ability

I'm working on it but Springsharp makes it look like the battery has no charge or doesn't exist, so I'm going to add in about 5 miles of range.

[TexanCowboy]

It can get 40-45 nm at top speed, enough for it to start at 8 and then move up to 25 when its within 15 nm, or start at 25 for 20 nm

[The Rock Doctor]

That may work for certain offensive attacks, then.

Let me draw your attention to the seakeeping rating.  A rating of 0.00 essentially means she's awash or sinking.  It's accepted that small, fast stuff will not have a glorious seakeeping rating, but something greater than 0.50 is probably a good target.  Your best way to improve that is by increasing freeboard, but you'll have to give up something else to do so without bringing down your hull strength too much.

Small, fast stuff like these are difficult, if not impossible, to accurate sim with SS - thus we work off a table of standard MTB designs.

[Logi]

Ships covered in water sink even in calm seas. Even worst, they operate extremely crappy at such conditions (well generally). As has been said, if you're going for such a small ship, you better use the MTB table rather than SSing it.

[maddox]

I find it commentable.  Not a waste of my time.

I found out for myself that the smallest real useable warships I could sim, were 250 tons or about. Desertfox could do better, but even his SS Turbinia's don't come close to the real one.

[Korpen]

I find that around 100ton is about the smallest ships that makes sense to use springsharp for (the Netherlands got a bunch of 100 ton TBs in service). That said, it is good fun trying to get the most out of the smallest possible ships.

[ctwaterman]

Hey you did pretty good Im with Maddox I still havent designed a 250 ton TB that I really like or have even built.

[Desertfox]

I have succesfully designed and built an 18t boat using SS2. It works great as long as you keep the speed down. I also have a bunch of designs in the 50t range. It is quite fun actually.


RGB-1, Mexico River Gunboat laid down 1933

Displacement:
   18 t light; 19 t standard; 20 t normal; 20 t full load

Dimensions: Length overall / water x beam x draught
   50.00 ft / 50.00 ft x 12.00 ft x 2.00 ft (normal load)
   15.24 m / 15.24 m x 3.66 m  x 0.61 m

Armament:
      1 - 1.85" / 47.0 mm guns in single mounts, 3.17lbs / 1.44kg shells, 1933 Model
     Breech loading gun in deck mount
     on centreline forward
      1 - 1.97" / 50.0 mm guns in single mounts, 3.81lbs / 1.73kg shells, 1933 Model
     Muzzle loading gun in deck mount
     on centreline aft
      2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1933 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 7 lbs / 3 kg
   Shells per gun, main battery: 100

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   0.50" / 13 mm     50.00 ft / 15.24 m   4.00 ft / 1.22 m
   Ends:   Unarmoured
     Main Belt covers 154 % of normal length

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

   - Conning tower: 0.50" / 13 mm

Machinery:
   Diesel Internal combustion motors,
   Geared drive, 2 shafts, 56 shp / 42 Kw = 10.00 kts
   Range 1,000nm at 5.00 kts
   Bunker at max displacement = 1 tons

Complement:
   4 - 6

Cost:
   £0.008 million / $0.031 million

Distribution of weights at normal displacement:
   Armament: 1 tons, 4.5 %
   Armour: 4 tons, 21.5 %
      - Belts: 4 tons, 18.9 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 0 tons, 2.2 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.4 %
   Machinery: 2 tons, 8.4 %
   Hull, fittings & equipment: 10 tons, 48.9 %
   Fuel, ammunition & stores: 1 tons, 6.4 %
   Miscellaneous weights: 2 tons, 10.2 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     57 lbs / 26 Kg = 17.9 x 1.9 " / 47 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.16
   Metacentric height 0.3 ft / 0.1 m
   Roll period: 9.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.20
   Seaboat quality  (Average = 1.00): 1.00

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.570
   Length to Beam Ratio: 4.17 : 1
   'Natural speed' for length: 7.07 kts
   Power going to wave formation at top speed: 66 %
   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:      5.00 ft / 1.52 m
      - Forecastle (20 %):   5.00 ft / 1.52 m
      - Mid (50 %):      5.00 ft / 1.52 m
      - Quarterdeck (15 %):   4.00 ft / 1.22 m
      - Stern:      4.00 ft / 1.22 m
      - Average freeboard:   4.68 ft / 1.42 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 73.4 %
      - Above water (accommodation/working, high = better): 96.1 %
   Waterplane Area: 427 Square feet or 40 Square metres
   Displacement factor (Displacement / loading): 118 %
   Structure weight / hull surface area: 14 lbs/sq ft or 70 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.79
      - Longitudinal: 8.91
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is adequate

[Desertfox]

Here ya go with pictures. The 50mm muzzle loader is actually a mortar. Upper left is this ship, lower right is the ship with a 75mm field gun. Other two are deisigns using tank turrets (too advanced for N-verse). 




RGB-1, New Switzerland River Gunboat laid down 1916

Displacement:
   23 t light; 24 t standard; 24 t normal; 25 t full load

Dimensions: Length overall / water x beam x draught
   50.00 ft / 50.00 ft x 12.00 ft x 2.50 ft (normal load)
   15.24 m / 15.24 m x 3.66 m  x 0.76 m

Armament:
      1 - 1.85" / 47.0 mm guns in single mounts, 3.17lbs / 1.44kg shells, 1916 Model
     Breech loading gun in deck mount
     on centreline forward
      1 - 1.97" / 50.0 mm guns in single mounts, 3.81lbs / 1.73kg shells, 1916 Model
     Muzzle loading gun in deck mount
     on centreline aft
      2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1916 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 7 lbs / 3 kg
   Shells per gun, main battery: 100

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   0.50" / 13 mm     50.00 ft / 15.24 m   4.00 ft / 1.22 m
   Ends:   Unarmoured
     Main Belt covers 154 % of normal length

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

   - Conning tower: 0.50" / 13 mm

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 64 ihp / 47 Kw = 10.00 kts
   Range 800nm at 5.00 kts
   Bunker at max displacement = 1 tons (100% coal)

Complement:
   5 - 7

Cost:
   £0.004 million / $0.017 million

Distribution of weights at normal displacement:
   Armament: 1 tons, 3.6 %
   Armour: 4 tons, 17.3 %
      - Belts: 4 tons, 15.1 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 0 tons, 1.7 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.4 %
   Machinery: 8 tons, 32.7 %
   Hull, fittings & equipment: 10 tons, 39.8 %
   Fuel, ammunition & stores: 2 tons, 6.6 %
   Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     25 lbs / 11 Kg = 7.8 x 1.9 " / 47 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.19
   Metacentric height 0.3 ft / 0.1 m
   Roll period: 9.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.20
   Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.570
   Length to Beam Ratio: 4.17 : 1
   'Natural speed' for length: 7.07 kts
   Power going to wave formation at top speed: 68 %
   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:      5.00 ft / 1.52 m
      - Forecastle (20 %):   5.00 ft / 1.52 m
      - Mid (30 %):      5.00 ft / 1.52 m
      - Quarterdeck (15 %):   4.00 ft / 1.22 m
      - Stern:      4.00 ft / 1.22 m
      - Average freeboard:   4.58 ft / 1.39 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 133.5 %
      - Above water (accommodation/working, high = better): 74.4 %
   Waterplane Area: 427 Square feet or 40 Square metres
   Displacement factor (Displacement / loading): 79 %
   Structure weight / hull surface area: 14 lbs/sq ft or 71 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.80
      - Longitudinal: 7.65
      - Overall: 1.00
   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

[TexanCowboy]

sounds good. Can you sim it with a petrol engine and batteries?

[Desertfox]

RGB-1, River Gunboat laid down 1916

Displacement:
   18 t light; 19 t standard; 20 t normal; 20 t full load

Dimensions: Length overall / water x beam x draught
   50.00 ft / 50.00 ft x 12.00 ft x 2.00 ft (normal load)
   15.24 m / 15.24 m x 3.66 m  x 0.61 m

Armament:
     1 - 1.85" / 47.0 mm guns in single mounts, 3.17lbs / 1.44kg shells, 1916 Model
     Breech loading gun in deck mount
     on centreline forward
     1 - 1.97" / 50.0 mm guns in single mounts, 3.81lbs / 1.73kg shells, 1916 Model
     Muzzle loading gun in deck mount
     on centreline aft
     2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1916 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 7 lbs / 3 kg
   Shells per gun, main battery: 100

Armour:
  - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   0.50" / 13 mm     50.00 ft / 15.24 m   4.00 ft / 1.22 m
   Ends:   Unarmoured
     Main Belt covers 154 % of normal length

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

  - Conning tower: 0.50" / 13 mm

Machinery:
   Petrol Internal combustion generators,
   Electric motors, 2 shafts, 56 shp / 42 Kw = 10.00 kts
   Range 1,000nm at 5.00 kts
   Bunker at max displacement = 1 tons

Complement:
   4 - 6

Cost:
   £0.003 million / $0.011 million

Distribution of weights at normal displacement:
   Armament: 1 tons, 4.5 %
   Armour: 4 tons, 21.5 %
      - Belts: 4 tons, 18.9 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 0 tons, 2.2 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.4 %
   Machinery: 2 tons, 10.7 %
   Hull, fittings & equipment: 10 tons, 51.3 %
   Fuel, ammunition & stores: 1 tons, 6.8 %
   Miscellaneous weights: 1 tons, 5.1 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     55 lbs / 25 Kg = 17.3 x 1.9 " / 47 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.05
   Metacentric height 0.2 ft / 0.1 m
   Roll period: 10.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.26
   Seaboat quality  (Average = 1.00): 1.14

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.570
   Length to Beam Ratio: 4.17 : 1
   'Natural speed' for length: 7.07 kts
   Power going to wave formation at top speed: 66 %
   Trim (Max stability = 0, Max steadiness = 100): 62
   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:      5.00 ft / 1.52 m
      - Forecastle (30 %):   5.00 ft / 1.52 m
      - Mid (40 %):      5.00 ft / 1.52 m
      - Quarterdeck (15 %):   5.00 ft / 1.52 m
      - Stern:      5.00 ft / 1.52 m
      - Average freeboard:   5.00 ft / 1.52 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 75.4 %
      - Above water (accommodation/working, high = better): 101.6 %
   Waterplane Area: 427 Square feet or 40 Square metres
   Displacement factor (Displacement / loading): 119 %
   Structure weight / hull surface area: 14 lbs/sq ft or 70 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.77
      - Longitudinal: 11.41
      - Overall: 1.01
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is adequate
   Ship has slow, easy roll, a good, steady gun platform

[TexanCowboy]

Very Nice. Can I buy the plan for, say $.5