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30 Boats (TB-01 - TB-30)
TB-01, CSA Coastal Torpedo Boat laid down 1913 (Engine 1912)
Displacement:
250 t light; 259 t standard; 309 t normal; 349 t full load
Dimensions: Length overall / water x beam x draught
224.00 ft / 216.00 ft x 18.00 ft x 6.63 ft (normal load)
68.27 m / 65.84 m x 5.49 m x 2.02 m
Armament:
2 - 3.50" / 88.9 mm guns in single mounts, 20.00lbs / 9.07kg shells, 1913 Model
Breech loading guns in deck mounts
on centreline ends, evenly spread
2 - 1.00" / 25.4 mm guns (1x2 guns), 0.50lbs / 0.23kg shells, 1913 Model
Breech loading guns in deck mount
on centreline aft
Weight of broadside 41 lbs / 19 kg
Shells per gun, main battery: 112
3 - 20.0" / 508 mm above water torpedoes
Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 8,500 shp / 6,341 Kw = 28.08 kts
Range 1,970nm at 15.00 kts
Bunker at max displacement = 90 tons
Complement:
36 - 47
Cost:
£0.039 million / $0.156 million
Distribution of weights at normal displacement:
Armament: 5 tons, 1.8 %
Machinery: 160 tons, 51.7 %
Hull, fittings & equipment: 81 tons, 26.1 %
Fuel, ammunition & stores: 59 tons, 19.1 %
Miscellaneous weights: 4 tons, 1.3 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
71 lbs / 32 Kg = 3.3 x 3.5 " / 89 mm shells or 0.1 torpedoes
Stability (Unstable if below 1.00): 1.20
Metacentric height 0.5 ft / 0.2 m
Roll period: 10.4 seconds
Steadiness - As gun platform (Average = 50 %): 56 %
- Recoil effect (Restricted arc if above 1.00): 0.20
Seaboat quality (Average = 1.00): 0.72
Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.420
Length to Beam Ratio: 12.00 : 1
'Natural speed' for length: 14.70 kts
Power going to wave formation at top speed: 67 %
Trim (Max stability = 0, Max steadiness = 100): 78
Bow angle (Positive = bow angles forward): 30.25 degrees
Stern overhang: 1.00 ft / 0.30 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 12.00 ft / 3.66 m
- Forecastle (20 %): 9.25 ft / 2.82 m
- Mid (40 %): 7.00 ft / 2.13 m
- Quarterdeck (20 %): 5.75 ft / 1.75 m
- Stern: 5.75 ft / 1.75 m
- Average freeboard: 7.40 ft / 2.25 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 181.6 %
- Above water (accommodation/working, high = better): 46.2 %
Waterplane Area: 2,424 Square feet or 225 Square metres
Displacement factor (Displacement / loading): 43 %
Structure weight / hull surface area: 17 lbs/sq ft or 85 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.18
- Overall: 0.54
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
Note: Forward 3.5" mount carries an unarmored spray shield.
Misc Weights: 3 torpedoes, 1 ton reserve
Range at max speed: 310 nm, 11 hours