Esc Coastal torpedoboats

[ledeper]

Torpedo boote , Esc Coastal torpedoboats laid down 1920

Displacement:
   172 t light; 176 t standard; 196 t normal; 211 t full load

Dimensions: Length overall / water x beam x draught
   202,46 ft / 196,85 ft x 18,04 ft x 5,41 ft (normal load)
   61,71 m / 60,00 m x 5,50 m  x 1,65 m

Armament:
      1 - 1,57" / 40,0 mm guns in single mounts, 1,95lbs / 0,88kg shells, 1920 Model
     Quick firing gun in deck mount
     on centreline forward
      2 - 0,79" / 20,0 mm guns (1x2 guns), 0,24lbs / 0,11kg shells, 1920 Model
     Anti-aircraft guns in deck mount
     on centreline aft
   Weight of broadside 2 lbs / 1 kg
   Shells per gun, main battery: 500
   2 - 20,9" / 530 mm above water torpedoes

Machinery:
   Diesel Internal combustion motors,
   Direct drive, 2 shafts, 5.494 shp / 4.098 Kw = 27,00 kts
   Range 950nm at 17,00 kts
   Bunker at max displacement = 35 tons

Complement:
   25 - 33

Cost:
   £0,049 million / $0,197 million

Distribution of weights at normal displacement:
   Armament: 0 tons, 0,2 %
   Machinery: 104 tons, 53,3 %
   Hull, fittings & equipment: 62 tons, 31,7 %
   Fuel, ammunition & stores: 24 tons, 12,3 %
   Miscellaneous weights: 5 tons, 2,6 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     56 lbs / 25 Kg = 28,8 x 1,6 " / 40 mm shells or 0,1 torpedoes
   Stability (Unstable if below 1.00): 1,11
   Metacentric height 0,5 ft / 0,1 m
   Roll period: 11,1 seconds
   Steadiness   - As gun platform (Average = 50 %): 74 %
         - Recoil effect (Restricted arc if above 1.00): 0,02
   Seaboat quality  (Average = 1.00): 0,88

Hull form characteristics:
   Hull has raised forecastle
   Block coefficient: 0,356
   Length to Beam Ratio: 10,91 : 1
   'Natural speed' for length: 14,03 kts
   Power going to wave formation at top speed: 66 %
   Trim (Max stability = 0, Max steadiness = 100): 85
   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:      15,42 ft / 4,70 m
      - Forecastle (20 %):   8,20 ft / 2,50 m (6,56 ft / 2,00 m aft of break)
      - Mid (50 %):      6,56 ft / 2,00 m
      - Quarterdeck (15 %):   6,56 ft / 2,00 m
      - Stern:      6,56 ft / 2,00 m
      - Average freeboard:   7,47 ft / 2,28 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 176,5 %
      - Above water (accommodation/working, high = better): 66,5 %
   Waterplane Area: 2.155 Square feet or 200 Square metres
   Displacement factor (Displacement / loading): 50 %
   Structure weight / hull surface area: 16 lbs/sq ft or 76 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,50
      - Longitudinal: 1,50
      - Overall: 0,55
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped
   Ship has slow, easy roll, a good, steady gun platform
   Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

Trial speed :32,5 knts
250 nm @27 knts

[ledeper]

Torpedoboote , Esc Oceangoing torpeboat laid down 1920

Displacement:
   305 t light; 312 t standard; 328 t normal; 341 t full load

Dimensions: Length overall / water x beam x draught
   210,18 ft / 208,33 ft x 16,40 ft x 6,07 ft (normal load)
   64,06 m / 63,50 m x 5,00 m  x 1,85 m

Armament:
     1 - 1,57" / 40,0 mm guns in single mounts, 1,95lbs / 0,89kg shells, 1920 Model
     Quick firing gun in deck mount
     on centreline forward
   Weight of broadside 2 lbs / 1 kg
   Shells per gun, main battery: 150
   2 - 18,0" / 457,2 mm above water torpedoes

Machinery:
   Diesel Internal combustion motors,
   Direct drive, 2 shafts, 10.357 shp / 7.726 Kw = 28,50 kts
   Range 900nm at 14,00 kts
   Bunker at max displacement = 29 tons

Complement:
   38 - 50

Cost:
   £0,085 million / $0,339 million

Distribution of weights at normal displacement:
   Armament: 0 tons, 0,1 %
   Machinery: 179 tons, 54,5 %
   Hull, fittings & equipment: 121 tons, 36,9 %
   Fuel, ammunition & stores: 23 tons, 7,0 %
   Miscellaneous weights: 5 tons, 1,5 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     109 lbs / 49 Kg = 55,8 x 1,6 " / 40 mm shells or 0,1 torpedoes
   Stability (Unstable if below 1.00): 1,10
   Metacentric height 0,4 ft / 0,1 m
   Roll period: 11,0 seconds
   Steadiness   - As gun platform (Average = 50 %): 61 %
         - Recoil effect (Restricted arc if above 1.00): 0,02
   Seaboat quality  (Average = 1.00): 1,06

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,553
   Length to Beam Ratio: 12,70 : 1
   'Natural speed' for length: 14,43 kts
   Power going to wave formation at top speed: 72 %
   Trim (Max stability = 0, Max steadiness = 100): 58
   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:      10,50 ft / 3,20 m
      - Forecastle (20 %):   10,50 ft / 3,20 m
      - Mid (50 %):      10,50 ft / 3,20 m
      - Quarterdeck (15 %):   10,50 ft / 3,20 m
      - Stern:      10,50 ft / 3,20 m
      - Average freeboard:   10,50 ft / 3,20 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 178,3 %
      - Above water (accommodation/working, high = better): 88,6 %
   Waterplane Area: 2.392 Square feet or 222 Square metres
   Displacement factor (Displacement / loading): 45 %
   Structure weight / hull surface area: 18 lbs/sq ft or 89 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,50
      - Longitudinal: 4,97
      - Overall: 0,63
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is cramped

170 nm@27 kn
Trial speed 32,5 kn