Torpedo Boats

[Walter]

Note that due to their size and the difficulty to sim these ships, the engines will be based on the output rather than the maximum speed.

[Walter]

Kotaka, Japan Torpedoboat Class 3 laid down 1886

Displacement:
   186 t light; 192 t standard; 203 t normal; 213 t full load

Dimensions: Length overall / water x beam x draught
   164.04 ft / 164.04 ft x 19.03 ft x 5.58 ft (normal load)
   50.00 m / 50.00 m x 5.80 m  x 1.70 m

Armament:
      4 - 1.85" / 47.0 mm guns in single mounts, 2.98lbs / 1.35kg shells, 1886 Model
     Quick firing guns in deck mounts
     on centreline ends, evenly spread
   Weight of broadside 12 lbs / 5 kg
   Shells per gun, main battery: 300
   3 - 14.2" / 360 mm above water torpedoes

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 1 shaft, 1,217 ihp / 908 Kw = 17.78 kts
   Range 600nm at 10.00 kts
   Bunker at max displacement = 21 tons (100% coal)

Complement:
   26 - 35

Cost:
   £0.023 million / $0.092 million

Distribution of weights at normal displacement:
   Armament: 1 tons, 0.7 %
   Machinery: 109 tons, 53.4 %
   Hull, fittings & equipment: 69 tons, 33.8 %
   Fuel, ammunition & stores: 18 tons, 8.7 %
   Miscellaneous weights: 7 tons, 3.4 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     59 lbs / 27 Kg = 19.7 x 1.9 " / 47 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.41
   Metacentric height 0.8 ft / 0.2 m
   Roll period: 9.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.03
   Seaboat quality  (Average = 1.00): 0.75

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.409
   Length to Beam Ratio: 8.62 : 1
   'Natural speed' for length: 12.81 kts
   Power going to wave formation at top speed: 55 %
   Trim (Max stability = 0, Max steadiness = 100): 67
   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:      3.94 ft / 1.20 m
      - Forecastle (20 %):   3.94 ft / 1.20 m
      - Mid (50 %):      3.94 ft / 1.20 m
      - Quarterdeck (15 %):   3.94 ft / 1.20 m
      - Stern:      3.94 ft / 1.20 m
      - Average freeboard:   3.94 ft / 1.20 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 182.1 %
      - Above water (accommodation/working, high = better): 36.8 %
   Waterplane Area: 1,829 Square feet or 170 Square metres
   Displacement factor (Displacement / loading): 42 %
   Structure weight / hull surface area: 26 lbs/sq ft or 126 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.91
      - Longitudinal: 0.83
      - Overall: 0.85
   Caution: Hull subject to strain in open-sea
   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

Max speed 19 knots

[Walter]

Hayabusa, Japan Torpedoboat Class 3 laid down 1898
Ships: Hayabusa, Kasasagi, Manazuru, Chidori, Kari, Aotaka, Hato, Tsubame, Hibari, Kiji, Sagi, Uzura, Kamome, Hashitaka, Otori

Displacement:
   138 t light; 143 t standard; 150 t normal; 156 t full load

Dimensions: Length overall / water x beam x draught
   147.64 ft / 147.64 ft x 16.08 ft x 4.92 ft (normal load)
   45.00 m / 45.00 m x 4.90 m  x 1.50 m

Armament:
      1 - 2.24" / 57.0 mm guns in single mounts, 5.65lbs / 2.56kg shells, 1898 Model
     Quick firing gun in deck mount
     on centreline forward
      2 - 1.65" / 42.0 mm guns in single mounts, 2.26lbs / 1.03kg shells, 1898 Model
     Quick firing guns in deck mounts
     on side, all amidships
   Weight of broadside 10 lbs / 5 kg
   Shells per gun, main battery: 200
   3 - 14.2" / 360 mm above water torpedoes

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 1 shaft, 4,200 ihp / 3,133 Kw = 24.73 kts
   Range 600nm at 10.00 kts
   Bunker at max displacement = 14 tons (100% coal)
     Caution: Delicate, lightweight machinery

Complement:
   20 - 27

Cost:
   £0.019 million / $0.078 million

Distribution of weights at normal displacement:
   Armament: 1 tons, 0.8 %
   Machinery: 97 tons, 64.4 %
   Hull, fittings & equipment: 33 tons, 22.1 %
   Fuel, ammunition & stores: 12 tons, 8.0 %
   Miscellaneous weights: 7 tons, 4.7 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     20 lbs / 9 Kg = 3.5 x 2.2 " / 57 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.02
   Metacentric height 0.3 ft / 0.1 m
   Roll period: 11.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 37 %
         - Recoil effect (Restricted arc if above 1.00): 0.07
   Seaboat quality  (Average = 1.00): 0.27

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.450
   Length to Beam Ratio: 9.18 : 1
   'Natural speed' for length: 12.15 kts
   Power going to wave formation at top speed: 74 %
   Trim (Max stability = 0, Max steadiness = 100): 100
   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:      5.25 ft / 1.60 m
      - Forecastle (20 %):   5.25 ft / 1.60 m
      - Mid (50 %):      5.25 ft / 1.60 m
      - Quarterdeck (15 %):   5.25 ft / 1.60 m
      - Stern:      5.25 ft / 1.60 m
      - Average freeboard:   5.25 ft / 1.60 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 219.4 %
      - Above water (accommodation/working, high = better): 43.5 %
   Waterplane Area: 1,442 Square feet or 134 Square metres
   Displacement factor (Displacement / loading): 11 %
   Structure weight / hull surface area: 14 lbs/sq ft or 69 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.49
      - Longitudinal: 0.87
      - Overall: 0.52
   Hull space for machinery, storage, compartmentation is extremely poor
   Room for accommodation and workspaces is extremely poor
   Caution: Lacks seaworthiness - very limited seakeeping ability

Max speed 29 knots

[Walter]

Shirataka, Japan Torpedoboat Class 1 laid down 1899

Displacement:
   116 t light; 121 t standard; 126 t normal; 130 t full load

Dimensions: Length overall / water x beam x draught
   152.56 ft / 152.56 ft x 16.73 ft x 4.13 ft (normal load)
   46.50 m / 46.50 m x 5.10 m  x 1.26 m

Armament:
      3 - 2.24" / 57.0 mm guns in single mounts, 5.65lbs / 2.56kg shells, 1899 Model
     Quick firing guns in deck mounts
     on centreline ends, majority forward
   Weight of broadside 17 lbs / 8 kg
   Shells per gun, main battery: 200
   4 - 14.2" / 360 mm above water torpedoes

Machinery:
   Oil fired boilers, complex reciprocating steam engines,
   Direct drive, 1 shaft, 2,600 ihp / 1,940 Kw = 22.96 kts
   Range 600nm at 10.00 kts
   Bunker at max displacement = 9 tons
     Caution: Delicate, lightweight machinery

Complement:
   18 - 24

Cost:
   £0.016 million / $0.066 million

Distribution of weights at normal displacement:
   Armament: 2 tons, 1.7 %
   Machinery: 76 tons, 60.1 %
   Hull, fittings & equipment: 29 tons, 22.9 %
   Fuel, ammunition & stores: 9 tons, 7.4 %
   Miscellaneous weights: 10 tons, 8.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     18 lbs / 8 Kg = 3.2 x 2.2 " / 57 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.02
   Metacentric height 0.4 ft / 0.1 m
   Roll period: 11.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 43 %
         - Recoil effect (Restricted arc if above 1.00): 0.10
   Seaboat quality  (Average = 1.00): 0.38

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.417
   Length to Beam Ratio: 9.12 : 1
   'Natural speed' for length: 12.35 kts
   Power going to wave formation at top speed: 68 %
   Trim (Max stability = 0, Max steadiness = 100): 100
   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:      4.59 ft / 1.40 m
      - Forecastle (20 %):   4.59 ft / 1.40 m
      - Mid (50 %):      4.59 ft / 1.40 m
      - Quarterdeck (15 %):   4.59 ft / 1.40 m
      - Stern:      4.59 ft / 1.40 m
      - Average freeboard:   4.59 ft / 1.40 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 215.3 %
      - Above water (accommodation/working, high = better): 37.2 %
   Waterplane Area: 1,505 Square feet or 140 Square metres
   Displacement factor (Displacement / loading): 16 %
   Structure weight / hull surface area: 13 lbs/sq ft or 62 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.49
      - Longitudinal: 0.63
      - Overall: 0.51
   Caution: Hull subject to strain in open-sea
   Hull space for machinery, storage, compartmentation is extremely poor
   Room for accommodation and workspaces is extremely poor
   Caution: Lacks seaworthiness - very limited seakeeping ability

Max speed 28 knots

[Walter]

TB-5, Japan Torpedoboat Class 3 laid down 1888
Ships: TB-5, TB-6, TB-7, TB-8, TB-9, TB-10, TB-11, TB-12, TB-13, TB-14, TB-15, TB-16, TB-17, TB-18, TB-19, TB-20

Displacement:
   48 t light; 50 t standard; 54 t normal; 57 t full load

Dimensions: Length overall / water x beam x draught
   118.11 ft / 118.11 ft x 11.48 ft x 2.95 ft (normal load)
   36.00 m / 36.00 m x 3.50 m  x 0.90 m

Armament:
      2 - 1.46" / 37.0 mm guns in single mounts, 1.50lbs / 0.68kg shells, 1888 Model
     Quick firing guns in deck mounts
     on centreline ends, evenly spread
   Weight of broadside 3 lbs / 1 kg
   Shells per gun, main battery: 600
   2 - 14.2" / 360 mm above water torpedoes

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 1 shaft, 525 ihp / 392 Kw = 17.14 kts
   Range 440nm at 10.00 kts
   Bunker at max displacement = 7 tons (100% coal)
     Caution: Delicate, lightweight machinery

Complement:
   9 - 12

Cost:
   £0.006 million / $0.025 million

Distribution of weights at normal displacement:
   Armament: 0 tons, 0.7 %
   Machinery: 30 tons, 56.5 %
   Hull, fittings & equipment: 12 tons, 22.8 %
   Fuel, ammunition & stores: 6 tons, 10.7 %
   Miscellaneous weights: 5 tons, 9.3 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     9 lbs / 4 Kg = 6.3 x 1.5 " / 37 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.19
   Metacentric height 0.3 ft / 0.1 m
   Roll period: 9.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.05
   Seaboat quality  (Average = 1.00): 0.65

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.470
   Length to Beam Ratio: 10.29 : 1
   'Natural speed' for length: 10.87 kts
   Power going to wave formation at top speed: 60 %
   Trim (Max stability = 0, Max steadiness = 100): 76
   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:      3.94 ft / 1.20 m
      - Forecastle (20 %):   3.50 ft / 1.07 m
      - Mid (50 %):      3.50 ft / 1.07 m
      - Quarterdeck (15 %):   3.50 ft / 1.07 m
      - Stern:      3.50 ft / 1.07 m
      - Average freeboard:   3.54 ft / 1.08 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 198.9 %
      - Above water (accommodation/working, high = better): 33.5 %
   Waterplane Area: 841 Square feet or 78 Square metres
   Displacement factor (Displacement / loading): 26 %
   Structure weight / hull surface area: 9 lbs/sq ft or 46 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.52
      - Longitudinal: 0.51
      - Overall: 0.51
   Caution: Hull subject to strain in open-sea
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is extremely poor
   Caution: Lacks seaworthiness - very limited seakeeping ability

Max speed 20 knots

[Walter]

TB-21, Japan Torpedoboat Class 3 laid down 1890
Ships: TB-21, TB-24

Displacement:
   72 t light; 74 t standard; 79 t normal; 82 t full load

Dimensions: Length overall / water x beam x draught
   121.39 ft / 121.39 ft x 14.11 ft x 4.59 ft (normal load)
   37.00 m / 37.00 m x 4.30 m  x 1.40 m

Armament:
      2 - 1.85" / 47.0 mm guns in single mounts, 3.17lbs / 1.44kg shells, 1890 Model
     Quick firing guns in deck mounts
     on centreline ends, evenly spread
   Weight of broadside 6 lbs / 3 kg
   Shells per gun, main battery: 300
   3 - 14.2" / 360 mm above water torpedoes

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 1 shaft, 1,121 ihp / 836 Kw = 19.81 kts
   Range 440nm at 10.00 kts
   Bunker at max displacement = 8 tons (100% coal)
     Caution: Delicate, lightweight machinery

Complement:
   13 - 17

Cost:
   £0.010 million / $0.039 million

Distribution of weights at normal displacement:
   Armament: 1 tons, 1.0 %
   Machinery: 47 tons, 59.4 %
   Hull, fittings & equipment: 17 tons, 21.9 %
   Fuel, ammunition & stores: 7 tons, 8.9 %
   Miscellaneous weights: 7 tons, 8.9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     10 lbs / 5 Kg = 3.2 x 1.9 " / 47 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.01
   Metacentric height 0.3 ft / 0.1 m
   Roll period: 11.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 44 %
         - Recoil effect (Restricted arc if above 1.00): 0.05
   Seaboat quality  (Average = 1.00): 0.44

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.350
   Length to Beam Ratio: 8.60 : 1
   'Natural speed' for length: 11.02 kts
   Power going to wave formation at top speed: 65 %
   Trim (Max stability = 0, Max steadiness = 100): 86
   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:      3.94 ft / 1.20 m
      - Forecastle (20 %):   3.41 ft / 1.04 m
      - Mid (50 %):      3.41 ft / 1.04 m
      - Quarterdeck (15 %):   3.41 ft / 1.04 m
      - Stern:      3.41 ft / 1.04 m
      - Average freeboard:   3.45 ft / 1.05 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 209.4 %
      - Above water (accommodation/working, high = better): 22.1 %
   Waterplane Area: 980 Square feet or 91 Square metres
   Displacement factor (Displacement / loading): 18 %
   Structure weight / hull surface area: 11 lbs/sq ft or 56 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.49
      - Longitudinal: 0.74
      - Overall: 0.51
   Caution: Hull subject to strain in open-sea
   Hull space for machinery, storage, compartmentation is extremely poor
   Room for accommodation and workspaces is extremely poor
   Caution: Lacks seaworthiness - very limited seakeeping ability

Max speed 20.75 knots

[Walter]

TB-22, Japan Torpedoboat Class 3 laid down 1891
Ships: TB-22, TB-23, TB-25, TB-31, TB-32, TB-33, TB-34, TB-35, TB-36, TB-37, TB-38, TB-44, TB-45, TB-46, TB-47, TB-48, TB-49, TB-60, TB-61

Displacement:
   78 t light; 80 t standard; 85 t normal; 88 t full load

Dimensions: Length overall / water x beam x draught
   124.67 ft / 124.67 ft x 13.78 ft x 4.92 ft (normal load)
   38.00 m / 38.00 m x 4.20 m  x 1.50 m

Armament:
      2 - 1.46" / 37.0 mm guns in single mounts, 1.55lbs / 0.70kg shells, 1891 Model
     Quick firing guns in deck mounts
     on centreline ends, evenly spread
   Weight of broadside 3 lbs / 1 kg
   Shells per gun, main battery: 400
   3 - 14.2" / 360 mm above water torpedoes

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 1 shaft, 768 ihp / 573 Kw = 17.98 kts
   Range 440nm at 10.00 kts
   Bunker at max displacement = 8 tons (100% coal)
     Caution: Delicate, lightweight machinery

Complement:
   13 - 18

Cost:
   £0.010 million / $0.039 million

Distribution of weights at normal displacement:
   Armament: 0 tons, 0.5 %
   Machinery: 47 tons, 55.9 %
   Hull, fittings & equipment: 23 tons, 27.2 %
   Fuel, ammunition & stores: 7 tons, 8.1 %
   Miscellaneous weights: 7 tons, 8.3 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     18 lbs / 8 Kg = 11.4 x 1.5 " / 37 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.07
   Metacentric height 0.3 ft / 0.1 m
   Roll period: 10.7 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.03
   Seaboat quality  (Average = 1.00): 0.68

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.350
   Length to Beam Ratio: 9.05 : 1
   'Natural speed' for length: 11.17 kts
   Power going to wave formation at top speed: 59 %
   Trim (Max stability = 0, Max steadiness = 100): 73
   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:      3.94 ft / 1.20 m
      - Forecastle (20 %):   3.50 ft / 1.07 m
      - Mid (50 %):      3.50 ft / 1.07 m
      - Quarterdeck (15 %):   3.50 ft / 1.07 m
      - Stern:      3.50 ft / 1.07 m
      - Average freeboard:   3.54 ft / 1.08 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 193.4 %
      - Above water (accommodation/working, high = better): 22.8 %
   Waterplane Area: 983 Square feet or 91 Square metres
   Displacement factor (Displacement / loading): 29 %
   Structure weight / hull surface area: 15 lbs/sq ft or 72 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.67
      - Longitudinal: 0.97
      - Overall: 0.70
   Caution: Hull subject to strain in open-sea
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is extremely poor
   Caution: Lacks seaworthiness - very limited seakeeping ability

Max speed 22.5 knots

[Walter]

TB-29, Japan Torpedoboat Class 3 laid down 1898
Ships: TB-29, TB-30

Displacement:
   82 t light; 84 t standard; 88 t normal; 91 t full load

Dimensions: Length overall / water x beam x draught
   121.39 ft / 121.39 ft x 13.45 ft x 3.94 ft (normal load)
   37.00 m / 37.00 m x 4.10 m  x 1.20 m

Armament:
      1 - 1.85" / 47.0 mm guns in single mounts, 3.17lbs / 1.44kg shells, 1898 Model
     Quick firing gun in deck mounts
     on centreline ends, evenly spread
   Weight of broadside 3 lbs / 1 kg
   Shells per gun, main battery: 300
   3 - 14.2" / 360 mm above water torpedoes

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 1 shaft, 2,000 ihp / 1,492 Kw = 21.81 kts
   Range 440nm at 10.00 kts
   Bunker at max displacement = 7 tons (100% coal)
     Caution: Delicate, lightweight machinery

Complement:
   13 - 18

Cost:
   £0.011 million / $0.044 million

Distribution of weights at normal displacement:
   Armament: 0 tons, 0.4 %
   Machinery: 55 tons, 62.6 %
   Hull, fittings & equipment: 19 tons, 21.7 %
   Fuel, ammunition & stores: 6 tons, 7.3 %
   Miscellaneous weights: 7 tons, 7.9 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     13 lbs / 6 Kg = 4.0 x 1.9 " / 47 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.00
   Metacentric height 0.2 ft / 0.1 m
   Roll period: 11.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 40 %
         - Recoil effect (Restricted arc if above 1.00): 0.04
   Seaboat quality  (Average = 1.00): 0.35

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.480
   Length to Beam Ratio: 9.02 : 1
   'Natural speed' for length: 11.02 kts
   Power going to wave formation at top speed: 73 %
   Trim (Max stability = 0, Max steadiness = 100): 89
   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:      4.92 ft / 1.50 m
      - Forecastle (20 %):   4.92 ft / 1.50 m
      - Mid (50 %):      4.92 ft / 1.50 m
      - Quarterdeck (15 %):   4.92 ft / 1.50 m
      - Stern:      4.92 ft / 1.50 m
      - Average freeboard:   4.92 ft / 1.50 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 214.1 %
      - Above water (accommodation/working, high = better): 31.2 %
   Waterplane Area: 1,023 Square feet or 95 Square metres
   Displacement factor (Displacement / loading): 13 %
   Structure weight / hull surface area: 11 lbs/sq ft or 53 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.47
      - Longitudinal: 1.07
      - Overall: 0.51
   Caution: Hull subject to strain in open-sea
   Hull space for machinery, storage, compartmentation is extremely poor
   Room for accommodation and workspaces is extremely poor
   Caution: Lacks seaworthiness - very limited seakeeping ability

Max speed 22.5 knots

[Walter]

TB-39, Japan Torpedoboat Class 3 laid down 1899
Ships: TB-39, TB-40, TB-41, TB-42, TB-43, TB-62, TB-63, TB-64, TB-65, TB-66

Displacement:
   105 t light; 108 t standard; 112 t normal; 116 t full load

Dimensions: Length overall / water x beam x draught
   150.92 ft / 150.92 ft x 15.09 ft x 4.92 ft (normal load)
   46.00 m / 46.00 m x 4.60 m  x 1.50 m

Armament:
      2 - 1.85" / 47.0 mm guns in single mounts, 3.17lbs / 1.44kg shells, 1899 Model
     Quick firing guns in deck mounts
     on centreline ends, evenly spread
   Weight of broadside 6 lbs / 3 kg
   Shells per gun, main battery: 300
   3 - 14.2" / 360 mm above water torpedoes

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 1 shaft, 2,000 ihp / 1,492 Kw = 22.28 kts
   Range 400nm at 10.00 kts
   Bunker at max displacement = 8 tons (100% coal)
     Caution: Delicate, lightweight machinery

Complement:
   16 - 22

Cost:
   £0.014 million / $0.055 million

Distribution of weights at normal displacement:
   Armament: 1 tons, 0.7 %
   Machinery: 68 tons, 60.4 %
   Hull, fittings & equipment: 29 tons, 25.8 %
   Fuel, ammunition & stores: 8 tons, 6.8 %
   Miscellaneous weights: 7 tons, 6.2 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     21 lbs / 10 Kg = 6.7 x 1.9 " / 47 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.17
   Metacentric height 0.4 ft / 0.1 m
   Roll period: 10.1 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.05
   Seaboat quality  (Average = 1.00): 0.66

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.350
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 12.28 kts
   Power going to wave formation at top speed: 64 %
   Trim (Max stability = 0, Max steadiness = 100): 76
   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:      4.92 ft / 1.50 m
      - Forecastle (20 %):   4.92 ft / 1.50 m
      - Mid (50 %):      4.92 ft / 1.50 m
      - Quarterdeck (15 %):   4.92 ft / 1.50 m
      - Stern:      4.92 ft / 1.50 m
      - Average freeboard:   4.92 ft / 1.50 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 207.5 %
      - Above water (accommodation/working, high = better): 44.8 %
   Waterplane Area: 1,303 Square feet or 121 Square metres
   Displacement factor (Displacement / loading): 17 %
   Structure weight / hull surface area: 13 lbs/sq ft or 65 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.54
      - Longitudinal: 0.92
      - Overall: 0.57
   Caution: Hull subject to strain in open-sea
   Hull space for machinery, storage, compartmentation is extremely poor
   Room for accommodation and workspaces is extremely poor
   Caution: Lacks seaworthiness - very limited seakeeping ability

Max speed 26 knots

[Walter]

TB-50, Japan Torpedoboat Class 3 laid down 1899
Ships: TB-50, TB-51, TB-52, TB-53, TB-54, TB-55, TB-56, TB-57, TB-58, TB-59

Displacement:
   49 t light; 50 t standard; 52 t normal; 53 t full load

Dimensions: Length overall / water x beam x draught
   111.55 ft / 111.55 ft x 11.48 ft x 2.95 ft (normal load)
   34.00 m / 34.00 m x 3.50 m  x 0.90 m

Armament:
      1 - 1.65" / 42.0 mm guns in single mounts, 2.26lbs / 1.03kg shells, 1899 Model
     Quick firing gun in deck mount
     on centreline forward
   Weight of broadside 2 lbs / 1 kg
   Shells per gun, main battery: 300
   2 - 14.2" / 360 mm above water torpedoes

Machinery:
   Oil fired boilers, complex reciprocating steam engines,
   Direct drive, 1 shaft, 660 ihp / 492 Kw = 18.09 kts
   Range 300nm at 10.00 kts
   Bunker at max displacement = 3 tons
     Caution: Delicate, lightweight machinery

Complement:
   9 - 12

Cost:
   £0.006 million / $0.024 million

Distribution of weights at normal displacement:
   Armament: 0 tons, 0.5 %
   Machinery: 29 tons, 56.6 %
   Hull, fittings & equipment: 14 tons, 27.5 %
   Fuel, ammunition & stores: 3 tons, 5.8 %
   Miscellaneous weights: 5 tons, 9.6 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     12 lbs / 6 Kg = 5.4 x 1.7 " / 42 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.01
   Metacentric height 0.2 ft / 0.1 m
   Roll period: 10.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.05
   Seaboat quality  (Average = 1.00): 0.57

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.480
   Length to Beam Ratio: 9.71 : 1
   'Natural speed' for length: 10.56 kts
   Power going to wave formation at top speed: 65 %
   Trim (Max stability = 0, Max steadiness = 100): 87
   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:      3.94 ft / 1.20 m
      - Forecastle (20 %):   3.94 ft / 1.20 m
      - Mid (50 %):      3.94 ft / 1.20 m
      - Quarterdeck (15 %):   3.94 ft / 1.20 m
      - Stern:      3.94 ft / 1.20 m
      - Average freeboard:   3.94 ft / 1.20 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 197.4 %
      - Above water (accommodation/working, high = better): 34.1 %
   Waterplane Area: 803 Square feet or 75 Square metres
   Displacement factor (Displacement / loading): 26 %
   Structure weight / hull surface area: 11 lbs/sq ft or 54 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.64
      - Longitudinal: 0.91
      - Overall: 0.67
   Caution: Hull subject to strain in open-sea
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is extremely poor
   Caution: Lacks seaworthiness - very limited seakeeping ability

Max speed 20 knots

[Walter]

TB-67, Japan Torpedoboat Class 3 laid down 1901
Ships: TB-67, TB-68, TB-69, TB-70, TB-71, TB-72, TB-73, TB-74, TB-75

Displacement:
   85 t light; 88 t standard; 90 t normal; 92 t full load

Dimensions: Length overall / water x beam x draught
   131.23 ft / 131.23 ft x 16.08 ft x 4.27 ft (normal load)
   40.00 m / 40.00 m x 4.90 m  x 1.30 m

Armament:
      2 - 1.85" / 47.0 mm guns in single mounts, 3.17lbs / 1.44kg shells, 1901 Model
     Quick firing guns in deck mounts
     on centreline ends, evenly spread
   Weight of broadside 6 lbs / 3 kg
   Shells per gun, main battery: 300
   3 - 14.2" / 360 mm above water torpedoes

Machinery:
   Oil fired boilers, complex reciprocating steam engines,
   Direct drive, 1 shaft, 1,200 ihp / 895 Kw = 19.89 kts
   Range 300nm at 10.00 kts
   Bunker at max displacement = 4 tons
     Caution: Delicate, lightweight machinery

Complement:
   13 - 18

Cost:
   £0.011 million / $0.043 million

Distribution of weights at normal displacement:
   Armament: 1 tons, 0.9 %
   Machinery: 51 tons, 56.6 %
   Hull, fittings & equipment: 26 tons, 29.2 %
   Fuel, ammunition & stores: 5 tons, 5.6 %
   Miscellaneous weights: 7 tons, 7.8 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     21 lbs / 9 Kg = 6.6 x 1.9 " / 47 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.10
   Metacentric height 0.4 ft / 0.1 m
   Roll period: 10.8 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.04
   Seaboat quality  (Average = 1.00): 0.55

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.350
   Length to Beam Ratio: 8.16 : 1
   'Natural speed' for length: 11.46 kts
   Power going to wave formation at top speed: 64 %
   Trim (Max stability = 0, Max steadiness = 100): 89
   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:      3.94 ft / 1.20 m
      - Forecastle (20 %):   3.94 ft / 1.20 m
      - Mid (50 %):      3.94 ft / 1.20 m
      - Quarterdeck (15 %):   3.94 ft / 1.20 m
      - Stern:      3.94 ft / 1.20 m
      - Average freeboard:   3.94 ft / 1.20 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 198.2 %
      - Above water (accommodation/working, high = better): 38.6 %
   Waterplane Area: 1,207 Square feet or 112 Square metres
   Displacement factor (Displacement / loading): 26 %
   Structure weight / hull surface area: 15 lbs/sq ft or 73 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.67
      - Longitudinal: 0.97
      - Overall: 0.69
   Caution: Hull subject to strain in open-sea
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is extremely poor
   Caution: Lacks seaworthiness - very limited seakeeping ability

Max speed 23.5 knots

[Walter]

Umikaze, Japan Large Torpedo Boat laid down 1914 (Engine 1912)
Ships: Umikaze, Yamakaze, Sakura, Tachibana, Urakaze, Kaba, Kaede, Katsura, Ume, Kusunoki, Kashiwa, Matsu, Sugi, Kiri, Sakaki.

Displacement:
   999 t light; 1,032 t standard; 1,233 t normal; 1,394 t full load

Dimensions: Length overall / water x beam x draught
   314.04 ft / 310.00 ft x 29.00 ft x 12.00 ft (normal load)
   95.72 m / 94.49 m x 8.84 m  x 3.66 m

Armament:
     3 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1914 Model
     Quick firing guns in deck mounts with hoists
     on centreline ends, majority forward, 1 raised mount
     4 - 2.24" / 57.0 mm guns in single mounts, 5.65lbs / 2.56kg shells, 1914 Model
     Quick firing guns in deck mounts with hoists
     on side, all amidships
   Weight of broadside 63 lbs / 29 kg
   Shells per gun, main battery: 200
   9 - 21.0" / 533.4 mm above water torpedoes

Armour:
  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   1.00" / 25 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 23,931 shp / 17,852 Kw = 30.50 kts
   Range 6,000nm at 12.00 kts
   Bunker at max displacement = 361 tons

Complement:
   103 - 135

Cost:
   £0.169 million / $0.675 million

Distribution of weights at normal displacement:
   Armament: 8 tons, 0.6%
   Armour: 5 tons, 0.4%
      - Belts: 0 tons, 0.0%
      - Torpedo bulkhead: 0 tons, 0.0%
      - Armament: 5 tons, 0.4%
      - Armour Deck: 0 tons, 0.0%
      - Conning Tower: 0 tons, 0.0%
   Machinery: 650 tons, 52.7%
   Hull, fittings & equipment: 260 tons, 21.1%
   Fuel, ammunition & stores: 234 tons, 18.9%
   Miscellaneous weights: 77 tons, 6.2%

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     221 lbs / 100 Kg = 16.4 x 3.0 " / 76 mm shells or 0.2 torpedoes
   Stability (Unstable if below 1.00): 1.13
   Metacentric height 1.0 ft / 0.3 m
   Roll period: 12.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 50 %
         - Recoil effect (Restricted arc if above 1.00): 0.12
   Seaboat quality  (Average = 1.00): 0.80

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0.400
   Length to Beam Ratio: 10.69 : 1
   'Natural speed' for length: 17.61 kts
   Power going to wave formation at top speed: 64 %
   Trim (Max stability = 0, Max steadiness = 100): 62
   Bow angle (Positive = bow angles forward): 12.00 degrees
   Stern overhang: 0.00 ft / 0.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:      19.00 ft / 5.79 m
      - Forecastle (25%):   16.50 ft / 5.03 m
      - Mid (25%):      16.50 ft / 5.03 m (8.50 ft / 2.59 m aft of break)
      - Quarterdeck (15%):   8.50 ft / 2.59 m
      - Stern:      8.50 ft / 2.59 m
      - Average freeboard:   10.75 ft / 3.28 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 182.0%
      - Above water (accommodation/working, high = better): 27.0%
   Waterplane Area: 5,534 Square feet or 514 Square metres
   Displacement factor (Displacement / loading): 60%
   Structure weight / hull surface area: 25 lbs/sq ft or 124 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 1.03
      - Overall: 0.53
   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

FC: 25 tons
Wireless: 25 tons
Torpedoes: 9 tons
Reserve: 18 tons
Total:77 tons


Trial Speed: 31.5

[Walter]

TB-100, Japan Torpedoboat Class 1 laid down 1918 (Engine 1916)
SHips: T-100, T-101, T-102, T-103, T-104, T-105, T-106, T-107, T-108, T-109

Displacement:
  500 t light; 518 t standard; 612 t normal; 688 t full load

Dimensions: Length overall / water x beam x draught
  252.47 ft / 250.00 ft x 21.00 ft x 10.00 ft (normal load)
  76.95 m / 76.20 m x 6.40 m  x 3.05 m

Armament:
     2 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1918 Model
    Quick firing guns in deck mounts with hoists
    on centreline ends, evenly spread
     4 - 1.85" / 47.0 mm guns in single mounts, 3.17lbs / 1.44kg shells, 1918 Model
    Quick firing guns in deck mounts with hoists
    on side ends, evenly spread
     20 - 0.45" / 11.4 mm guns (2x10 guns), 0.05lbs / 0.02kg shells, 1918 Model
    Machine guns in deck mounts
    on centreline ends, evenly spread
  Weight of broadside 41 lbs / 18 kg
  Shells per gun, main battery: 200
  6 - 17.7" / 450 mm above water torpedoes

Machinery:
  Oil fired boilers, steam turbines,
  Geared drive, 2 shafts, 17,159 shp / 12,801 Kw = 30.50 kts
  Range 5,000nm at 12.00 kts
  Bunker at max displacement = 170 tons

Complement:
  60 - 79

Cost:
  £0.134 million / $0.535 million

Distribution of weights at normal displacement:
  Armament: 5 tons, 0.8%
  Machinery: 322 tons, 52.7%
  Hull, fittings & equipment: 156 tons, 25.5%
  Fuel, ammunition & stores: 112 tons, 18.3%
  Miscellaneous weights: 17 tons, 2.7%

Overall survivability and seakeeping ability:
  Survivability (Non-critical penetrating hits needed to sink ship):
    131 lbs / 59 Kg = 9.7 x 3.0 " / 76 mm shells or 0.2 torpedoes
  Stability (Unstable if below 1.00): 1.13
  Metacentric height 0.6 ft / 0.2 m
  Roll period: 11.3 seconds
  Steadiness   - As gun platform (Average = 50 %): 50 %
        - Recoil effect (Restricted arc if above 1.00): 0.25
  Seaboat quality  (Average = 1.00): 0.76

Hull form characteristics:
  Hull has a flush deck
  Block coefficient: 0.408
  Length to Beam Ratio: 11.90 : 1
  'Natural speed' for length: 15.81 kts
  Power going to wave formation at top speed: 68 %
  Trim (Max stability = 0, Max steadiness = 100): 66
  Bow angle (Positive = bow angles forward): 10.00 degrees
  Stern overhang: 0.00 ft / 0.00 m
  Freeboard (% = measuring location as a percentage of overall length):
     - Stem:      14.00 ft / 4.27 m
     - Forecastle (20%):   8.75 ft / 2.67 m
     - Mid (50%):      8.75 ft / 2.67 m
     - Quarterdeck (15%):   8.75 ft / 2.67 m
     - Stern:      8.75 ft / 2.67 m
     - Average freeboard:   9.17 ft / 2.80 m
  Ship tends to be wet forward

Ship space, strength and comments:
  Space   - Hull below water (magazines/engines, low = better): 179.7%
     - Above water (accommodation/working, high = better): 39.6%
  Waterplane Area: 3,247 Square feet or 302 Square metres
  Displacement factor (Displacement / loading): 46%
  Structure weight / hull surface area: 22 lbs/sq ft or 109 Kg/sq metre
  Hull strength (Relative):
     - Cross-sectional: 0.50
     - Longitudinal: 1.63
     - Overall: 0.56
  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

Max speed 33 knots