Armada Coastal Torpedo Boats

[Jefgte]

CTB1 - 1915H1
CTB2 -
CTB3 -
CTB4 -
CTB5 -
CTB6 -


200t, Peru CTB laid down 1915 (Engine 1912)

Displacement:
   200 t light; 206 t standard; 234 t normal; 255 t full load

Dimensions: Length overall / water x beam x draught
   178.31 ft / 177.17 ft x 16.88 ft x 6.92 ft (normal load)
   54.35 m / 54.00 m x 5.15 m  x 2.11 m

Armament:
      1 - 3.54" / 90.0 mm guns in single mounts, 22.24lbs / 10.09kg shells, 1915 Model
     Quick firing gun in deck mount
     on centreline
      2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1915 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 22 lbs / 10 kg
   Shells per gun, main battery: 175
   3 - 18.0" / 457.2 mm above water torpedoes

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.79" / 20 mm         -               -
   2nd:   0.50" / 13 mm         -               -

Machinery:
   Oil fired boilers, steam turbines,
   Geared drive, 2 shafts, 7 000 shp / 5 222 Kw = 27.16 kts
   Range 200nm at 27.00 kts
   2150nm at 12kts
   Bunker at max displacement = 49 tons

Complement:
   29 - 38

Cost:
   £0.039 million / $0.155 million

Distribution of weights at normal displacement:
   Armament: 3 tons, 1.2 %
   Armour: 2 tons, 0.7 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 2 tons, 0.7 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 124 tons, 53.0 %
   Hull, fittings & equipment: 65 tons, 28.0 %
   Fuel, ammunition & stores: 34 tons, 14.6 %
   Miscellaneous weights: 6 tons, 2.6 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     54 lbs / 25 Kg = 2.4 x 3.5 " / 90 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.14
   Metacentric height 0.4 ft / 0.1 m
   Roll period: 10.6 seconds
   Steadiness   - As gun platform (Average = 50 %): 48 %
         - Recoil effect (Restricted arc if above 1.00): 0.14
   Seaboat quality  (Average = 1.00): 0.65

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.395
   Length to Beam Ratio: 10.50 : 1
   'Natural speed' for length: 13.31 kts
   Power going to wave formation at top speed: 71 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   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:      13.12 ft / 4.00 m
      - Forecastle (18 %):   9.84 ft / 3.00 m
      - Mid (50 %):      5.91 ft / 1.80 m
      - Quarterdeck (15 %):   5.91 ft / 1.80 m
      - Stern:      5.25 ft / 1.60 m
      - Average freeboard:   7.43 ft / 2.27 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 183.2 %
      - Above water (accommodation/working, high = better): 40.6 %
   Waterplane Area: 1 836 Square feet or 171 Square metres
   Displacement factor (Displacement / loading): 40 %
   Structure weight / hull surface area: 17 lbs/sq ft or 83 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 2.12
      - Overall: 0.57
   Hull space for machinery, storage, compartmentation is cramped
   Room for accommodation and workspaces is extremely poor
   Caution: Lacks seaworthiness - very limited seakeeping ability

[Jefgte]

These torpedo boats receive in july 1914 from GC were adapted in Paracas Shipsyards, near Pisco, to standard Peruvian armament.
They receive the TB Mancora class guns, GC torpedoes tubes were also adapted.
2 weeks of work on each TB.

Maria, august 1914
Cartagena, august 1914
Esmeraldas, sept 1914
Guayaquil, sept 1914
La Guaira, oct 1914
David, oct 1914
Cali, nov 1914
Barranquilla, nov 1914
All are affected to coastal bases protection in january 1915

410t - Maria class, From GC to Peru Coastal TB laid down 1899 (Engine 1900)

Displacement:
   408 t light; 420 t standard; 466 t normal; 502 t full load

Dimensions: Length overall / water x beam x draught
   200.13 ft / 200.13 ft x 20.01 ft x 10.17 ft (normal load)
   61.00 m / 61.00 m x 6.10 m  x 3.10 m

Armament:
     2 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1899 Model
     Quick firing guns in deck mounts
     on centreline, evenly spread
     2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1899 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 27 lbs / 12 kg
   Shells per gun, main battery: 200
   3 - 18.0" / 457 mm above water torpedoes

Armour:
  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.79" / 20 mm         -               -
   2nd:   0.79" / 20 mm         -               -

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 10 000 ihp / 7 460 Kw = 26.99 kts
   Range 2 000nm at 10.00 kts
   Bunker at max displacement = 82 tons (100% coal)
     Caution: Delicate, lightweight machinery

Complement:
   49 - 65

Cost:
   £0.058 million / $0.231 million

Distribution of weights at normal displacement:
   Armament: 3 tons, 0.7 %
   Armour: 3 tons, 0.5 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 3 tons, 0.5 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 290 tons, 62.2 %
   Hull, fittings & equipment: 108 tons, 23.2 %
   Fuel, ammunition & stores: 58 tons, 12.5 %
   Miscellaneous weights: 4 tons, 0.9 %

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): 1.24
   Metacentric height 0.7 ft / 0.2 m
   Roll period: 10.3 seconds
   Steadiness   - As gun platform (Average = 50 %): 57 %
         - Recoil effect (Restricted arc if above 1.00): 0.10
   Seaboat quality  (Average = 1.00): 0.83

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.400
   Length to Beam Ratio: 10.00 : 1
   'Natural speed' for length: 14.15 kts
   Power going to wave formation at top speed: 69 %
   Trim (Max stability = 0, Max steadiness = 100): 69
   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:      11.48 ft / 3.50 m
      - Forecastle (19 %):   13.12 ft / 4.00 m
      - Mid (50 %):      6.56 ft / 2.00 m
      - Quarterdeck (18 %):   6.56 ft / 2.00 m
      - Stern:      6.56 ft / 2.00 m
      - Average freeboard:   8.70 ft / 2.65 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 207.3 %
      - Above water (accommodation/working, high = better): 48.7 %
   Waterplane Area: 2 465 Square feet or 229 Square metres
   Displacement factor (Displacement / loading): 15 %
   Structure weight / hull surface area: 20 lbs/sq ft or 98 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.50
      - Longitudinal: 2.25
      - Overall: 0.58
   Hull space for machinery, storage, compartmentation is extremely poor
   Room for accommodation and workspaces is extremely poor
   Poor seaboat, wet and uncomfortable, reduced performance in heavy weather