Habsburg GTB 1909a

[Borys]

GTB 1909, Oesterreich-Ungarn Grossetorpedoboot laid down 1909 - 5 laid down in January 1909

Displacement:
   403 t light; 417 t standard; 450 t normal; 477 t full load

Dimensions: Length overall / water x beam x draught
   225,00 ft / 225,00 ft x 20,00 ft x 7,00 ft (normal load)
   68,58 m / 68,58 m x 6,10 m  x 2,13 m

Armament:
      2 - 3,00" / 76,2 mm guns in single mounts, 13,50lbs / 6,12kg shells, 1909 Model
     Quick firing guns in deck mounts
     on centreline ends, evenly spread
      2 - 1,85" / 47,0 mm guns in single mounts, 3,00lbs / 1,36kg shells, 1909 Model
     Quick firing guns in deck mounts
     on side, all amidships
      2 - 0,43" / 11,0 mm guns in single mounts, 0,04lbs / 0,02kg shells, 1909 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 33 lbs / 15 kg
   Shells per gun, main battery: 250
   4 - 18,0" / 457,2 mm above water torpedoes

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 11 091 shp / 8 274 Kw = 28,00 kts
   Range 1 500nm at 12,00 kts
   Bunker at max displacement = 60 tons

Complement:
   48 - 63

Cost:
   £0,051 million / $0,204 million

Distribution of weights at normal displacement:
   Armament: 4 tons, 0,9%
   Machinery: 239 tons, 53,1%
   Hull, fittings & equipment: 150 tons, 33,3%
   Fuel, ammunition & stores: 47 tons, 10,5%
   Miscellaneous weights: 10 tons, 2,2%

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     143 lbs / 65 Kg = 10,6 x 3,0 " / 76 mm shells or 0,2 torpedoes
   Stability (Unstable if below 1.00): 1,24
   Metacentric height 0,7 ft / 0,2 m
   Roll period: 10,3 seconds
   Steadiness   - As gun platform (Average = 50 %): 59 %
         - Recoil effect (Restricted arc if above 1.00): 0,16
   Seaboat quality  (Average = 1.00): 1,18

Hull form characteristics:
   Hull has rise forward of midbreak
   Block coefficient: 0,500
   Length to Beam Ratio: 11,25 : 1
   'Natural speed' for length: 15,00 kts
   Power going to wave formation at top speed: 70 %
   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:      16,50 ft / 5,03 m
      - Forecastle (10%):   16,50 ft / 5,03 m
      - Mid (15%):      16,50 ft / 5,03 m (10,50 ft / 3,20 m aft of break)
      - Quarterdeck (15%):   10,50 ft / 3,20 m
      - Stern:      10,50 ft / 3,20 m
      - Average freeboard:   11,40 ft / 3,47 m

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 181,4%
      - Above water (accommodation/working, high = better): 71,3%
   Waterplane Area: 2 998 Square feet or 279 Square metres
   Displacement factor (Displacement / loading): 43%
   Structure weight / hull surface area: 20 lbs/sq ft or 98 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,50
      - Longitudinal: 3,92
      - Overall: 0,61
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped