Design Competition: 200 ton Torpedo Boat

[Nobody]

As the title says I'm looking for a 200 ton Torpedo Boat.
Laid down 1919,
Engine year 1916.
Seekeeping of 0.5 to 0.7
Stability >1.05
as fast as possible.

Details about the miscellaneous weight (Torpedoes) would be appreciated.

[Guinness]

This is what the OE is building. Seakeeping is lower than you have specified, but the OE regards it as perfectly acceptable for service in the Med or Red Sea.

200t Coastal Torpedo Boat, Ottoman Empire Torpedo Boat laid down 1919 (Engine 1916)

Displacement:
   200 t light; 206 t standard; 240 t normal; 267 t full load

Dimensions: Length overall / water x beam x draught
   181.26 ft / 177.49 ft x 16.90 ft x 6.56 ft (normal load)
   55.25 m / 54.10 m x 5.15 m  x 2.00 m

Armament:
      1 - 2.95" / 75.0 mm guns in single mounts, 10.80lbs / 4.90kg shells, 1919 Model
     Quick firing gun in deck mount
     on centreline forward
      2 - 2.24" / 57.0 mm guns in single mounts, 6.00lbs / 2.72kg shells, 1919 Model
     Quick firing guns in deck mounts
     on side, all aft
      2 - 0.51" / 13.0 mm guns in single mounts, 0.07lbs / 0.03kg shells, 1919 Model
     Machine guns in deck mounts
     on side, all amidships, all raised mounts - superfiring
   Weight of broadside 23 lbs / 10 kg
   Shells per gun, main battery: 122
   2 - 21.0" / 533.4 mm above water torpedoes

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.59" / 15 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 1 shaft, 9,100 shp / 6,788 Kw = 28.57 kts
   Range 1,729nm at 15.00 kts
   Bunker at max displacement = 61 tons
     Caution: Delicate, lightweight machinery

Complement:
   29 - 39

Cost:
   £0.061 million / $0.243 million

Distribution of weights at normal displacement:
   Armament: 3 tons, 1.3 %
   Armour: 1 tons, 0.4 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 1 tons, 0.4 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 131 tons, 54.4 %
   Hull, fittings & equipment: 59 tons, 24.6 %
   Fuel, ammunition & stores: 40 tons, 16.9 %
   Miscellaneous weights: 6 tons, 2.5 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     44 lbs / 20 Kg = 3.4 x 3.0 " / 75 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.08
   Metacentric height 0.4 ft / 0.1 m
   Roll period: 11.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 36 %
         - Recoil effect (Restricted arc if above 1.00): 0.12
   Seaboat quality  (Average = 1.00): 0.30

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.427
   Length to Beam Ratio: 10.50 : 1
   'Natural speed' for length: 13.32 kts
   Power going to wave formation at top speed: 74 %
   Trim (Max stability = 0, Max steadiness = 100): 86
   Bow angle (Positive = bow angles forward): 10.70 degrees
   Stern overhang: 1.97 ft / 0.60 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      9.51 ft / 2.90 m
      - Forecastle (14 %):   9.19 ft / 2.80 m
      - Mid (33 %):      9.02 ft / 2.75 m (5.09 ft / 1.55 m aft of break)
      - Quarterdeck (10 %):   5.09 ft / 1.55 m
      - Stern:      5.09 ft / 1.55 m
      - Average freeboard:   6.44 ft / 1.96 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 188.0 %
      - Above water (accommodation/working, high = better): 38.7 %
   Waterplane Area: 1,784 Square feet or 166 Square metres
   Displacement factor (Displacement / loading): 34 %
   Structure weight / hull surface area: 17 lbs/sq ft or 84 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.29
      - Overall: 0.54
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is extremely poor
   Caution: Lacks seaworthiness - very limited seakeeping ability

Misc Weight:
4t: 2x21" Torpedoes
2t: Reserve
- or -
6t: Mines

Range at max speed: 230nm, or 8 hours
Trial Speed: 34 knots

[ctwaterman]

The Small TB Below is currently being built by the Empire in Large Numbers.  Your ships in the Rift Near Blantrye have probably been seeing them for about 2 years now with over 20 built and all currently stationed at Blantrye.  ;)

Miniscule, Empire of Italia TB 1917 laid down 1917 (Engine 1916)

Displacement:
   204 t light; 210 t standard; 228 t normal; 242 t full load

Dimensions: Length overall / water x beam x draught
   174.10 ft / 172.64 ft x 14.68 ft x 5.00 ft (normal load)
   53.06 m / 52.62 m x 4.47 m  x 1.52 m

Armament:
      1 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1906 Model
     Quick firing gun in deck mounts
     on centreline ends, evenly spread
      2 - 0.98" / 25.0 mm guns (1x2 guns), 0.48lbs / 0.22kg shells, 1911 Model
     Machine guns in deck mount
     on centreline aft, all raised guns - superfiring
   Weight of broadside 14 lbs / 7 kg
   Shells per gun, main battery: 130
   2 - 21.0" / 533.4 mm above water torpedoes

Machinery:
   Diesel Internal combustion generators,
   Electric motors, 2 shafts, 5,535 shp / 4,129 Kw = 25.00 kts
   Range 2,500nm at 10.00 kts
   Bunker at max displacement = 32 tons

Complement:
   29 - 38

Cost:
   £0.045 million / $0.181 million

Distribution of weights at normal displacement:
   Armament: 2 tons, 0.8 %
   Machinery: 116 tons, 51.0 %
   Hull, fittings & equipment: 76 tons, 33.4 %
   Fuel, ammunition & stores: 24 tons, 10.3 %
   Miscellaneous weights: 10 tons, 4.4 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     78 lbs / 35 Kg = 5.8 x 3.0 " / 76 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.11
   Metacentric height 0.3 ft / 0.1 m
   Roll period: 10.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 53 %
         - Recoil effect (Restricted arc if above 1.00): 0.20
   Seaboat quality  (Average = 1.00): 1.05

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.630
   Length to Beam Ratio: 11.76 : 1
   'Natural speed' for length: 13.14 kts
   Power going to wave formation at top speed: 73 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 7.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      11.85 ft / 3.61 m
      - Forecastle (20 %):   9.19 ft / 2.80 m
      - Mid (65 %):      9.19 ft / 2.80 m
      - Quarterdeck (15 %):   9.19 ft / 2.80 m
      - Stern:      9.19 ft / 2.80 m
      - Average freeboard:   9.40 ft / 2.87 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 175.6 %
      - Above water (accommodation/working, high = better): 52.5 %
   Waterplane Area: 1,906 Square feet or 177 Square metres
   Displacement factor (Displacement / loading): 52 %
   Structure weight / hull surface area: 15 lbs/sq ft or 74 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 5.07
      - Overall: 0.63
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped

4T - 2 Torpedoes
6T - Depth Charges
0T - Short Range Wireless
Trial Speed 30 Knots

[Nobody]

Thank you so far, it seems my own design was better than I thought:

200t Torpedo Boat 1919a, Orange small Torpedo Boat laid down 1919 (Engine 1916)

Displacement:
   200 t light; 209 t standard; 234 t normal; 254 t full load

Dimensions: Length overall / water x beam x draught
   196,85 ft / 196,85 ft x 16,40 ft x 6,33 ft (normal load)
   60,00 m / 60,00 m x 5,00 m  x 1,93 m

Armament:
      2 - 4,00" / 102 mm guns in single mounts, 32,00lbs / 14,51kg shells, 1919 Model
     Quick firing guns in deck mounts
     on centreline ends, evenly spread
      1 - 1,57" / 40,0 mm guns in single mounts, 1,95lbs / 0,89kg shells, 1919 Model
     Anti-aircraft gun in deck mount
     on centreline amidships
      2 - 0,50" / 12,7 mm guns in single mounts, 0,06lbs / 0,03kg shells, 1919 Model
     Breech loading guns in deck mounts
     on centreline ends, evenly spread, all raised mounts - superfiring
   Weight of broadside 66 lbs / 30 kg
   Shells per gun, main battery: 120
   5 - 21,0" / 533,4 mm above water torpedoes

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 1 shaft, 6.882 shp / 5.134 Kw = 27,60 kts
                           Trial Speed: 32.46
   Range 300nm at 25,00 kts
         1300 nm @ 15 kn
   Bunker at max displacement = 45 tons

Complement:
   29 - 38

Cost:
   £0,065 million / $0,260 million

Distribution of weights at normal displacement:
   Armament: 8 tons, 3,5%
   Machinery: 114 tons, 48,6%
   Hull, fittings & equipment: 68 tons, 29,0%
   Fuel, ammunition & stores: 34 tons, 14,5%
   Miscellaneous weights: 10 tons, 4,3%
               10 t --> 5 Torpedos/Tubes

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     45 lbs / 20 Kg = 1,4 x 4,0 " / 102 mm shells or 0,1 torpedoes
   Stability (Unstable if below 1.00): 1,05
   Metacentric height 0,4 ft / 0,1 m
   Roll period: 11,4 seconds
   Steadiness   - As gun platform (Average = 50 %): 42 %
         - Recoil effect (Restricted arc if above 1.00): 0,50
   Seaboat quality  (Average = 1.00): 0,76

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0,400
   Length to Beam Ratio: 12,00 : 1
   'Natural speed' for length: 14,03 kts
   Power going to wave formation at top speed: 68 %
   Trim (Max stability = 0, Max steadiness = 100): 47
   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:      13,12 ft / 4,00 m
      - Forecastle (25%):   9,84 ft / 3,00 m
      - Mid (35%):      9,84 ft / 3,00 m (6,56 ft / 2,00 m aft of break)
      - Quarterdeck (20%):   6,56 ft / 2,00 m
      - Stern:      6,56 ft / 2,00 m
      - Average freeboard:   8,04 ft / 2,45 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 188,1%
      - Above water (accommodation/working, high = better): -5,9%
   Waterplane Area: 1.880 Square feet or 175 Square metres
   Displacement factor (Displacement / loading): 40%
   Structure weight / hull surface area: 15 lbs/sq ft or 75 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,43
      - Longitudinal: 2,09
      - Overall: 0,50
   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


@ctwaterman, isn't your ship a tad too large? It's not <201 t, you need slips for them.

[Desertfox]

Torpedo Boat laid down 1916

Displacement:
   200 t light; 209 t standard; 227 t normal; 242 t full load

Dimensions: Length overall / water x beam x draught
   220.00 ft / 220.00 ft x 19.00 ft x 5.00 ft (normal load)
   67.06 m / 67.06 m x 5.79 m  x 1.52 m

Armament:
      1 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1916 Model
     Breech loading gun in deck mount
     on centreline forward
      2 - 1.57" / 40.0 mm guns (1x2 guns), 1.95lbs / 0.89kg shells, 1916 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, 1916 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 36 lbs / 16 kg
   Shells per gun, main battery: 200
   6 - 21.0" / 533.4 mm above water torpedoes

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 6,680 shp / 4,983 Kw = 28.00 kts
   Range 1,000nm at 15.00 kts
   Bunker at max displacement = 33 tons

Complement:
   29 - 38

Cost:
   £0.044 million / $0.177 million

Distribution of weights at normal displacement:
   Armament: 5 tons, 2.0 %
   Machinery: 116 tons, 51.1 %
   Hull, fittings & equipment: 73 tons, 32.2 %
   Fuel, ammunition & stores: 27 tons, 12.0 %
   Miscellaneous weights: 6 tons, 2.6 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     58 lbs / 26 Kg = 1.8 x 4.0 " / 102 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.07
   Metacentric height 0.5 ft / 0.1 m
   Roll period: 11.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.18
   Seaboat quality  (Average = 1.00): 0.74

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.380
   Length to Beam Ratio: 11.58 : 1
   'Natural speed' for length: 14.83 kts
   Power going to wave formation at top speed: 65 %
   Trim (Max stability = 0, Max steadiness = 100): 66
   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:      15.00 ft / 4.57 m
      - Forecastle (25 %):   7.00 ft / 2.13 m
      - Mid (40 %):      7.00 ft / 2.13 m
      - Quarterdeck (15 %):   7.00 ft / 2.13 m
      - Stern:      5.00 ft / 1.52 m
      - Average freeboard:   7.65 ft / 2.33 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 183.8 %
      - Above water (accommodation/working, high = better): 1.3 %
   Waterplane Area: 2,549 Square feet or 237 Square metres
   Displacement factor (Displacement / loading): 42 %
   Structure weight / hull surface area: 16 lbs/sq ft or 79 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.47
      - Longitudinal: 1.11
      - Overall: 0.51
   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

[maddox]

The Miniscule, and her French niece Minime are being build on slips and in docks of the "+" type. As well the MAS boats. These ships are pure military,and per ton, the most expensive  surface combatants.

Displacement:
Minime, French micro DD  

208 t light; 216 t standard; 234 t normal; 249 t full load

Dimensions: Length overall / water x beam x draught
  170,55 ft / 169,09 ft x 13,78 ft x 5,25 ft (normal load)
  51,98 m / 51,54 m x 4,20 m  x 1,60 m

Armament:
     2 - 2,76" / 70,0 mm guns in single mounts, 12,13lbs / 5,50kg shells, 1918 Model
    Quick firing guns in deck mounts
    on centreline ends, evenly spread
     2 - 0,98" / 25,0 mm guns in single mounts, 0,48lbs / 0,22kg shells, 1918 Model
    Machine guns in deck mounts
    on centreline ends, evenly spread, all raised mounts
  Weight of broadside 25 lbs / 11 kg
  Shells per gun, main battery: 200
  2 - 21,0" / 533,4 mm above water torpedoes

Machinery:
  Oil fired boilers, steam turbines,
  Direct drive, 1 shaft, 5.768 shp / 4.303 Kw = 25,00 kts
  Range 2.500nm at 10,00 kts
  Bunker at max displacement = 33 tons

Complement:
  29 - 38

Cost:
  £0,052 million / $0,209 million

Distribution of weights at normal displacement:
  Armament: 3 tons, 1,2%
  Machinery: 118 tons, 50,5%
  Hull, fittings & equipment: 77 tons, 33,0%
  Fuel, ammunition & stores: 26 tons, 11,0%
  Miscellaneous weights: 10 tons, 4,3%

Overall survivability and seakeeping ability:
  Survivability (Non-critical penetrating hits needed to sink ship):
    74 lbs / 33 Kg = 7,1 x 2,8 " / 70 mm shells or 0,1 torpedoes
  Stability (Unstable if below 1.00): 1,06
  Metacentric height 0,3 ft / 0,1 m
  Roll period: 10,8 seconds
  Steadiness   - As gun platform (Average = 50 %): 51 %
        - Recoil effect (Restricted arc if above 1.00): 0,44
  Seaboat quality  (Average = 1.00): 1,03

Hull form characteristics:
  Hull has a flush deck
  Block coefficient: 0,670
  Length to Beam Ratio: 12,27 : 1
  'Natural speed' for length: 13,00 kts
  Power going to wave formation at top speed: 74 %
  Trim (Max stability = 0, Max steadiness = 100): 50
  Bow angle (Positive = bow angles forward): 7,00 degrees
  Stern overhang: 0,00 ft / 0,00 m
  Freeboard (% = measuring location as a percentage of overall length):
     - Stem:      11,84 ft / 3,61 m
     - Forecastle (20%):   9,19 ft / 2,80 m
     - Mid (60%):      9,19 ft / 2,80 m
     - Quarterdeck (15%):   9,19 ft / 2,80 m
     - Stern:      9,19 ft / 2,80 m
     - Average freeboard:   9,40 ft / 2,86 m
  Ship tends to be wet forward

Ship space, strength and comments:
  Space   - Hull below water (magazines/engines, low = better): 177,1%
     - Above water (accommodation/working, high = better): 44,3%
  Waterplane Area: 1.798 Square feet or 167 Square metres
  Displacement factor (Displacement / loading): 51%
  Structure weight / hull surface area: 15 lbs/sq ft or 74 Kg/sq metre
  Hull strength (Relative):
     - Cross-sectional: 0,50
     - Longitudinal: 5,88
     - Overall: 0,64
  Hull space for machinery, storage, compartmentation is cramped
  Room for accommodation and workspaces is extremely poor

4 tons torpedo's 2 tubes fixed forward.
6 ton Depth Charges in 2 stern racks, 9 charges a rack.

Trial speed 30 kts.

[ctwaterman]

Both The Orange and Desertfox' design to not meet the minimum cross sectional for Destroyers.   And Yes I build mine in Dry Docks I dont have a lack of them.  Im building between 25 and 30 40 Ton MAS boats per HY in

• Dry Dock as well as 5 of the 200 Ton TB.
  
  Charles

[Nobody]

Both The Orange and Desertfox' design to not meet the minimum cross sectional for Destroyers.

Until a few days ago I would have agreed.
However let me quote the current rules which I looked up before I designed it:

Destroyer and TB architecture - Top speed no less than 20kts, composite hull strength > 0.49

[ctwaterman]

Hull Strength

Minimum 0.50 cross-sectional hull strength for ships built to Destroyer/TB tech; otherwise, composite hull strength of 1.00 is recommended.  Ships not meeting this criteria are at risk of moderator-inflicted incidents.

Length to Beam Ratio

Ratios should be reflective of the size and speed of the vessel.

Length to Beam Ratios of 12:1 (smaller, faster ships) or 10:1 (larger or slower ships) or less are reasonable and do not risk moderator-inflicted incidents.  Ships approaching circular shape risk moderator-inflicted performance issues.

Ok, I had to go back and check the Minimum Cross Sectional of the Hull must be .50 and the Length to be must be < 12:1.

Desertfoxes has a .47 Cross Sectional
The Orange TB has a .43 

The Reason my TB weighs in at 204 my version or 208 the French Version is getting to that .50 Cross Sectional...  You did get the 12 to 1 Length to Beam ratio dead on.   Ive tried to get my Boat Down in size but I cant do it without giving up speed or something else....

[Nobody]

Well I choose it to be 12:1, which alone should be perfectly fine.

About the other thing... great we can both quote the rules and are both right - may I ask for clarification whether composite hull strength or cross-sectional hull strength has to be >= 0.5?
I would prefer the composite over the cross sectional value, simply because it's easier and it is the value SpringSharp cares about as well. Maybe starting 1920?

[Guinness]

both composite and cross-sectional hull strength need to be greater than 0.5 for a TB rules built ship.

[ctwaterman]

I dont think Ive ever gotten a ship to have a Cross Sectional Greater then .50 and be less then .50 Composite Strength....

Setting the Composite to .50 is easy getting these small TB to not roll over and sink in a stiff breeze while staying afloat now thats difficult.

[TexanCowboy]

Something I designed a while back. I'll update it when I catch up.

Haiti, CSA Economy Civilian TB laid down 1918 (Engine 1916)

Displacement:
   200 t light; 206 t standard; 230 t normal; 249 t full load

Dimensions: Length overall / water x beam x draught
   201.05 ft / 200.00 ft x 16.80 ft x 6.30 ft (normal load)
   61.28 m / 60.96 m x 5.12 m  x 1.92 m

Armament:
      1 - 3.50" / 88.9 mm guns in single mounts, 21.44lbs / 9.72kg shells, 1918 Model
     Breech loading gun in deck mount
     on centreline aft, 1 raised gun
      1 - 1.00" / 25.4 mm guns in single mounts, 0.50lbs / 0.23kg shells, 1918 Model
     Machine gun in deck mount
     on centreline forward, 1 raised gun
   Weight of broadside 22 lbs / 10 kg
   Shells per gun, main battery: 150
   3 - 14.0" / 355.6 mm above water torpedoes

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.50" / 13 mm         -               -
   2nd:   0.50" / 13 mm         -               -

Machinery:
   Coal and oil fired boilers, steam turbines,
   No drive to shaft, 1 shaft, 5,169 shp / 3,856 Kw = 26.00 kts
   Range 3,300nm at 10.00 kts
   Bunker at max displacement = 43 tons (10% coal)

Complement:
   29 - 38

Cost:
   £0.051 million / $0.204 million

Distribution of weights at normal displacement:
   Armament: 3 tons, 1.2 %
   Armour: 1 tons, 0.4 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 1 tons, 0.4 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 116 tons, 50.3 %
   Hull, fittings & equipment: 77 tons, 33.6 %
   Fuel, ammunition & stores: 30 tons, 13.2 %
   Miscellaneous weights: 3 tons, 1.3 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     76 lbs / 35 Kg = 3.6 x 3.5 " / 89 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.33
   Metacentric height 0.6 ft / 0.2 m
   Roll period: 9.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 61 %
         - Recoil effect (Restricted arc if above 1.00): 0.20
   Seaboat quality  (Average = 1.00): 1.22

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.380
   Length to Beam Ratio: 11.90 : 1
   'Natural speed' for length: 14.14 kts
   Power going to wave formation at top speed: 64 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   Bow angle (Positive = bow angles forward): 5.00 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 (20 %):   8.00 ft / 2.44 m
      - Mid (50 %):      8.00 ft / 2.44 m
      - Quarterdeck (15 %):   8.00 ft / 2.44 m
      - Stern:      8.00 ft / 2.44 m
      - Average freeboard:   8.32 ft / 2.54 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 173.1 %
      - Above water (accommodation/working, high = better): 73.8 %
   Waterplane Area: 1,933 Square feet or 180 Square metres
   Displacement factor (Displacement / loading): 55 %
   Structure weight / hull surface area: 17 lbs/sq ft or 82 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 2.44
      - Overall: 0.59
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped
   Good seaboat, rides out heavy weather easily

[Kaiser Kirk]

Bavaria has produced six 200 ton MGBs in the past several years to experiment with. Rambowed and with a forward turtleback deck, they are more seaworthy than many.  Tinkering with the design, and updating it, this would appear possible :

TGB-3, Bavaria Torpedo Gun Boat laid down 1919 (Engine 1916)

Displacement:
   200 t light; 207 t standard; 235 t normal; 257 t full load

Dimensions: Length overall / water x beam x draught
   198.49 ft / 198.49 ft x 18.37 ft x 5.64 ft (normal load)
   60.50 m / 60.50 m x 5.60 m  x 1.72 m

Armament:
     1 - 3.54" / 90.0 mm guns in single mounts, 22.05lbs / 10.00kg shells, 1919 Model
     Quick firing gun in deck mount
     on centreline aft
While the 90mm gun isn't actually ready, the older 88s will do in the meantime
     1 - 1.85" / 47.0 mm guns in single mounts, 3.17lbs / 1.44kg shells, 1919 Model
     Quick firing gun in deck mount
     on centreline forward, 1 raised gun
     4 - 0.31" / 8.0 mm guns in single mounts, 0.02lbs / 0.01kg shells, 1919 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 25 lbs / 11 kg
   Shells per gun, main battery: 200
   3 - 21.0" / 533.4 mm above water torpedoes

Armour:
  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.39" / 10 mm   0.39" / 10 mm            -
   2nd:   0.39" / 10 mm         -               -
   3rd:   0.39" / 10 mm         -               -

  - Conning tower: 0.79" / 20 mm

Machinery:
   Diesel Internal combustion motors,
   Geared drive, 1 shaft, 5,416 shp / 4,040 Kw = 26.00 kts
trail speed : 30.97
   Range 2,600nm at 12.00 kts
   Bunker at max displacement = 50 tons

Complement:
   29 - 39

Cost:
   £0.057 million / $0.227 million

Distribution of weights at normal displacement:
   Armament: 3 tons, 1.4 %
   Armour: 2 tons, 0.9 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 1 tons, 0.6 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 1 tons, 0.3 %
   Machinery: 117 tons, 49.7 %
   Hull, fittings & equipment: 71 tons, 30.4 %
   Fuel, ammunition & stores: 36 tons, 15.1 %
   Miscellaneous weights: 6 tons, 2.6 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     64 lbs / 29 Kg = 2.9 x 3.5 " / 90 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.15
   Metacentric height 0.5 ft / 0.2 m
   Roll period: 10.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.14
   Seaboat quality  (Average = 1.00): 1.01

Hull form characteristics:
   Hull has raised forecastle
   Block coefficient: 0.400
   Length to Beam Ratio: 10.80 : 1
   'Natural speed' for length: 14.09 kts
   Power going to wave formation at top speed: 66 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   Bow angle (Positive = bow angles forward): -20.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      16.14 ft / 4.92 m
      - Forecastle (20 %):   14.60 ft / 4.45 m (6.59 ft / 2.01 m aft of break)
      - Mid (50 %):      6.59 ft / 2.01 m
      - Quarterdeck (15 %):   6.59 ft / 2.01 m
      - Stern:      6.59 ft / 2.01 m
      - Average freeboard:   8.32 ft / 2.54 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 174.1 %
      - Above water (accommodation/working, high = better): 39.8 %
   Waterplane Area: 2,123 Square feet or 197 Square metres
   Displacement factor (Displacement / loading): 54 %
   Structure weight / hull surface area: 16 lbs/sq ft or 78 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.83
      - Overall: 0.57
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is extremely poor
   Ship has slow, easy roll, a good, steady gun platform

Designed as a motor gun boat.

A hotchkiss 47mm revolver cannon forward is raised in "B" to fire over the raked bow. The aft 90mm is located in "X" with the torpedoes in "Y".  MGs in 1-4 provide AP fire.
Light armor is intended to keep the crew functioning in gun battles.

trail speed : 30.97

[damocles]

I's like to license that as an Eboot.

With some changes in armament to Dutch tech it could fit in very well with my light forces..

D.