Miniture Torpedo Boats for Export

[maddox]

For $0.5 and 0.5BP you can build 27 of these.

You could try under this "rule"

Small ships

It is possible to build small ships (less than 201 t light displacement) to mercantile  standards without the use of dedicated military infrastructure.  Two options are available:

1)  If the land mass or region has a coastal town/city and industrial output of at least 0.5 BP, it may build one small ship each half-year.  For each additional 0.5 BP, the area may construct an additional small ship.  Dollar and BP costs remain the same as if built in a miiltary yard.

2)  If the land mass is without either a coastal town/city or the industrial output, the components of a small ship can be built and assembled elsewhere, transported to the desired location, and assembled.  The time and cost of construction will be equal to that of normal construction, plus a penalty to be determined by a Moderator based on the specific circumstances of the ship.

These rules do not apply to small ships built to military standards, such as MTBs.  These will require slipways or docks in government shipyards

[Logi]

But the armament and armor weight over 2%.

[maddox]

Double the size but not the armament.
Still nifty little police barges.

At least you won't clog up the small naval yards that can construct 1500 ton sloops with 50 tons barges.

[TexanCowboy]

So, I can take the plan for nothing? This will definiatly inprove New Swiss-Romanian relations.

[Desertfox]

This boat is actually based on the British Pamela and Una. A pair of wooden boats used agianst teh Japanese in Burma. They show up in Jane's Warships of WWII.


Removing the Armor...

RGB-1, Light River Gunboat laid down 1916

Displacement:
   10 t light; 11 t standard; 11 t normal; 12 t full load

Dimensions: Length overall / water x beam x draught
   50.00 ft / 50.00 ft x 10.00 ft x 1.40 ft (normal load)
   15.24 m / 15.24 m x 3.05 m  x 0.43 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:
   - 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, 39 shp / 29 Kw = 10.00 kts
   Range 1,000nm at 5.00 kts
   Bunker at max displacement = 1 tons

Complement:
   3 - 4

Cost:
   £0.002 million / $0.009 million

Distribution of weights at normal displacement:
   Armament: 1 tons, 7.8 %
   Armour: 0 tons, 4.2 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 0 tons, 3.7 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.5 %
   Machinery: 1 tons, 12.8 %
   Hull, fittings & equipment: 8 tons, 65.9 %
   Fuel, ammunition & stores: 1 tons, 9.2 %
   Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     27 lbs / 12 Kg = 8.5 x 1.9 " / 47 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.11
   Metacentric height 0.2 ft / 0.1 m
   Roll period: 9.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.36
   Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.570
   Length to Beam Ratio: 5.00 : 1
   'Natural speed' for length: 7.07 kts
   Power going to wave formation at top speed: 62 %
   Trim (Max stability = 0, Max steadiness = 100): 49
   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 %):   4.00 ft / 1.22 m
      - Mid (40 %):      4.00 ft / 1.22 m
      - Quarterdeck (15 %):   4.00 ft / 1.22 m
      - Stern:      4.00 ft / 1.22 m
      - Average freeboard:   4.12 ft / 1.26 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 101.0 %
      - Above water (accommodation/working, high = better): 90.3 %
   Waterplane Area: 356 Square feet or 33 Square metres
   Displacement factor (Displacement / loading): 108 %
   Structure weight / hull surface area: 13 lbs/sq ft or 65 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.79
      - Longitudinal: 8.64
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is adequate

[maddox]

What plan, every 2bit workshop along a beach and a good smithy can start constructing the hulls. Weapons can be delivered from the main arsenal.

For the same amount of trouble the hull is based on a fishing boat- like the French Mushroom class. (but she's a lot bigger)

[Desertfox]

Tell you what, instead of $0.5 for plans for a single ship, for $1 I'll send a team of river gunboat designers over. That way you get more than one design.


With a 75mm field gun aboard...

RGB-1, Light (75mm) River Gunboat laid down 1916

Displacement:
   13 t light; 14 t standard; 14 t normal; 15 t full load

Dimensions: Length overall / water x beam x draught
   50.00 ft / 50.00 ft x 11.00 ft x 1.60 ft (normal load)
   15.24 m / 15.24 m x 3.35 m  x 0.49 m

Armament:
      1 - 2.95" / 75.0 mm guns in single mounts, 12.87lbs / 5.84kg shells, 1916 Model
     Breech loading gun in deck mount
     on centreline amidships
      2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1916 Model
     Machine guns in deck mounts
     on side ends, evenly spread
   Weight of broadside 13 lbs / 6 kg
   Shells per gun, main battery: 30

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.25" / 6 mm         -               -

Machinery:
   Petrol Internal combustion generators,
   Electric motors, 2 shafts, 46 shp / 34 Kw = 10.00 kts
   Range 1,000nm at 5.00 kts
   Bunker at max displacement = 1 tons

Complement:
   3 - 4

Cost:
   £0.003 million / $0.013 million

Distribution of weights at normal displacement:
   Armament: 2 tons, 11.3 %
   Armour: 0 tons, 2.6 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 0 tons, 2.6 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 1 tons, 10.4 %
   Hull, fittings & equipment: 10 tons, 69.7 %
   Fuel, ammunition & stores: 1 tons, 6.0 %
   Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     26 lbs / 12 Kg = 2.0 x 3.0 " / 75 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.08
   Metacentric height 0.2 ft / 0.1 m
   Roll period: 10.0 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.54
   Seaboat quality  (Average = 1.00): 1.05

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.570
   Length to Beam Ratio: 4.55 : 1
   'Natural speed' for length: 7.07 kts
   Power going to wave formation at top speed: 64 %
   Trim (Max stability = 0, Max steadiness = 100): 48
   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 %):   4.00 ft / 1.22 m
      - Stern:      4.00 ft / 1.22 m
      - Average freeboard:   4.63 ft / 1.41 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 114.1 %
      - Above water (accommodation/working, high = better): 114.0 %
   Waterplane Area: 391 Square feet or 36 Square metres
   Displacement factor (Displacement / loading): 85 %
   Structure weight / hull surface area: 16 lbs/sq ft or 77 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.76
      - Longitudinal: 11.61
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is adequate