Avisos Torpilleur are built for colonial work.
AT1 to AT4, France AT1 laid down 1891 (Engine 1890)
Displacement:
1 250 t light; 1 298 t standard; 1 428 t normal; 1 531 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(229.66 ft / 229.66 ft) x 32.81 ft x (12.63 / 13.34 ft)
(70.00 m / 70.00 m) x 10.00 m x (3.85 / 4.07 m)
Armament:
3 - 3.94" / 100.0 mm 45.0 cal guns - 30.78lbs / 13.96kg shells, 200 per gun
Breech loading guns in deck mounts, 1891 Model
3 x Single mounts on centreline, evenly spread
1 raised mount
4 - 2.56" / 65.0 mm 40.0 cal guns - 8.02lbs / 3.64kg shells, 500 per gun
Quick firing guns in deck mounts, 1891 Model
4 x Single mounts on sides, evenly spread
Weight of broadside 124 lbs / 56 kg
Main Torpedoes
4 - 15.0" / 380 mm, 14.96 ft / 4.56 m torpedoes - 0.278 t each, 1.111 t total
In 4 sets of deck mounted side rotating tubes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.39" / 10 mm - -
2nd: 0.39" / 10 mm - -
Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 2 shafts, 6 170 ihp / 4 603 Kw = 20.15 kts
Range 2 500nm at 10.00 kts
Bunker at max displacement = 233 tons (100% coal)
Complement:
115 - 150
Cost:
£0.163 million / $0.652 million
Distribution of weights at normal displacement:
Armament: 22 tons, 1.6 %
- Guns: 20 tons, 1.4 %
- Weapons: 2 tons, 0.2 %
Armour: 6 tons, 0.4 %
- Armament: 6 tons, 0.4 %
Machinery: 810 tons, 56.7 %
Hull, fittings & equipment: 400 tons, 28.0 %
Fuel, ammunition & stores: 177 tons, 12.4 %
Miscellaneous weights: 12 tons, 0.8 %
- On freeboard deck: 12 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
524 lbs / 238 Kg = 17.2 x 3.9 " / 100 mm shells or 1.2 torpedoes
Stability (Unstable if below 1.00): 1.66
Metacentric height 2.2 ft / 0.7 m
Roll period: 9.3 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.08
Seaboat quality (Average = 1.00): 1.03
Hull form characteristics:
Hull has low forecastle, rise forward of midbreak,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.525 / 0.533
Length to Beam Ratio: 7.00 : 1
'Natural speed' for length: 15.15 kts
Power going to wave formation at top speed: 62 %
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 (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 15.00 %, 9.09 ft / 2.77 m, 11.71 ft / 3.57 m
- Forward deck: 8.00 %, 16.31 ft / 4.97 m, 16.31 ft / 4.97 m
- Aft deck: 62.00 %, 9.09 ft / 2.77 m, 9.09 ft / 2.77 m
- Quarter deck: 15.00 %, 9.09 ft / 2.77 m, 9.09 ft / 2.77 m
- Average freeboard: 9.90 ft / 3.02 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 187.9 %
- Above water (accommodation/working, high = better): 81.0 %
Waterplane Area: 5 137 Square feet or 477 Square metres
Displacement factor (Displacement / loading): 58 %
Structure weight / hull surface area: 50 lbs/sq ft or 243 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 2.11
- Overall: 1.00
Cramped machinery, storage, compartmentation space
Cramped accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
AT5 to AT8, France AT2 laid down 1894 (Engine 1890)
Displacement:
1 275 t light; 1 323 t standard; 1 469 t normal; 1 586 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(229.66 ft / 229.66 ft) x 33.73 ft x (12.64 / 13.42 ft)
(70.00 m / 70.00 m) x 10.28 m x (3.85 / 4.09 m)
Armament:
3 - 3.94" / 100.0 mm 45.0 cal guns - 30.78lbs / 13.96kg shells, 200 per gun
Breech loading guns in deck mounts, 1894 Model
3 x Single mounts on centreline, evenly spread
1 raised mount
4 - 2.56" / 65.0 mm 40.0 cal guns - 8.02lbs / 3.64kg shells, 500 per gun
Quick firing guns in deck mounts, 1894 Model
4 x Single mounts on sides, evenly spread
Weight of broadside 124 lbs / 56 kg
Main Torpedoes
4 - 15.0" / 380 mm, 14.96 ft / 4.56 m torpedoes - 0.311 t each, 1.246 t total
In 4 sets of deck mounted side rotating tubes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.39" / 10 mm - -
2nd: 0.39" / 10 mm - -
Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 2 shafts, 6 334 ihp / 4 725 Kw = 20.17 kts
Range 2 780nm at 10.00 kts
Bunker at max displacement = 262 tons (100% coal)
Complement:
118 - 154
Cost:
£0.168 million / $0.671 million
Distribution of weights at normal displacement:
Armament: 23 tons, 1.5 %
- Guns: 20 tons, 1.4 %
- Weapons: 2 tons, 0.2 %
Armour: 6 tons, 0.4 %
- Armament: 6 tons, 0.4 %
Machinery: 837 tons, 57.0 %
Hull, fittings & equipment: 397 tons, 27.0 %
Fuel, ammunition & stores: 194 tons, 13.2 %
Miscellaneous weights: 12 tons, 0.8 %
- On freeboard deck: 12 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
544 lbs / 247 Kg = 17.8 x 3.9 " / 100 mm shells or 1.1 torpedoes
Stability (Unstable if below 1.00): 1.73
Metacentric height 2.4 ft / 0.7 m
Roll period: 9.1 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.07
Seaboat quality (Average = 1.00): 1.02
Hull form characteristics:
Hull has low forecastle, rise forward of midbreak,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.525 / 0.534
Length to Beam Ratio: 6.81 : 1
'Natural speed' for length: 15.15 kts
Power going to wave formation at top speed: 62 %
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 (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 15.00 %, 9.06 ft / 2.76 m, 11.68 ft / 3.56 m
- Forward deck: 8.00 %, 16.27 ft / 4.96 m, 16.27 ft / 4.96 m
- Aft deck: 62.00 %, 9.06 ft / 2.76 m, 9.06 ft / 2.76 m
- Quarter deck: 15.00 %, 9.06 ft / 2.76 m, 9.06 ft / 2.76 m
- Average freeboard: 9.87 ft / 3.01 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 188.6 %
- Above water (accommodation/working, high = better): 81.3 %
Waterplane Area: 5 281 Square feet or 491 Square metres
Displacement factor (Displacement / loading): 58 %
Structure weight / hull surface area: 49 lbs/sq ft or 238 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 2.10
- Overall: 1.00
Cramped machinery, storage, compartmentation space
Cramped accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
AT9 to AT12, France AT3 laid down 1896 (Engine 1890)
Displacement:
1 300 t light; 1 350 t standard; 1 509 t normal; 1 636 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(229.66 ft / 229.66 ft) x 34.12 ft x (12.84 / 13.67 ft)
(70.00 m / 70.00 m) x 10.40 m x (3.91 / 4.17 m)
Armament:
3 - 3.94" / 100.0 mm 45.0 cal guns - 30.78lbs / 13.96kg shells, 200 per gun
Breech loading guns in deck mounts, 1896 Model
3 x Single mounts on centreline, evenly spread
1 raised mount
4 - 2.56" / 65.0 mm 40.0 cal guns - 8.02lbs / 3.64kg shells, 500 per gun
Quick firing guns in deck mounts, 1896 Model
4 x Single mounts on sides, evenly spread
Weight of broadside 124 lbs / 56 kg
Main Torpedoes
4 - 17.7" / 450 mm, 17.72 ft / 5.40 m torpedoes - 0.542 t each, 2.168 t total
In 4 sets of deck mounted side rotating tubes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.39" / 10 mm - -
2nd: 0.39" / 10 mm - -
Machinery:
Coal fired boilers, simple reciprocating steam engines,
Direct drive, 2 shafts, 6 443 ihp / 4 807 Kw = 20.16 kts
Range 3 000nm at 10.00 kts
Bunker at max displacement = 287 tons (100% coal)
Complement:
120 - 157
Cost:
£0.172 million / $0.688 million
Distribution of weights at normal displacement:
Armament: 25 tons, 1.6 %
- Guns: 20 tons, 1.3 %
- Weapons: 4 tons, 0.3 %
Armour: 6 tons, 0.4 %
- Armament: 6 tons, 0.4 %
Machinery: 861 tons, 57.1 %
Hull, fittings & equipment: 397 tons, 26.3 %
Fuel, ammunition & stores: 209 tons, 13.8 %
Miscellaneous weights: 12 tons, 0.8 %
- On freeboard deck: 12 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
557 lbs / 253 Kg = 18.2 x 3.9 " / 100 mm shells or 0.7 torpedoes
Stability (Unstable if below 1.00): 1.75
Metacentric height 2.5 ft / 0.8 m
Roll period: 9.1 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.06
Seaboat quality (Average = 1.00): 1.03
Hull form characteristics:
Hull has low forecastle, rise forward of midbreak,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.525 / 0.535
Length to Beam Ratio: 6.73 : 1
'Natural speed' for length: 15.15 kts
Power going to wave formation at top speed: 62 %
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 (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 15.00 %, 10.50 ft / 3.20 m, 11.81 ft / 3.60 m
- Forward deck: 8.00 %, 15.09 ft / 4.60 m, 15.09 ft / 4.60 m
- Aft deck: 62.00 %, 9.19 ft / 2.80 m, 9.19 ft / 2.80 m
- Quarter deck: 15.00 %, 9.19 ft / 2.80 m, 9.19 ft / 2.80 m
- Average freeboard: 9.97 ft / 3.04 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 188.8 %
- Above water (accommodation/working, high = better): 79.5 %
Waterplane Area: 5 343 Square feet or 496 Square metres
Displacement factor (Displacement / loading): 59 %
Structure weight / hull surface area: 48 lbs/sq ft or 235 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.91
- Longitudinal: 2.15
- Overall: 1.00
Cramped machinery, storage, compartmentation space
Cramped accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
"Ministère de la Guerre" decide to have 7000nm fleet range for Aviso Torpilleur.
Displacement increase to 3000t with about 30% reserved for the coal.
AT13 to AT20, France AT4 laid down 1899 (Engine 1900)
Displacement:
3 000 t light; 3 108 t standard; 3 640 t normal; 4 066 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(393.70 ft / 393.70 ft) x 45.93 ft x (13.68 / 14.90 ft)
(120.00 m / 120.00 m) x 14.00 m x (4.17 / 4.54 m)
Armament:
4 - 5.51" / 140 mm 45.0 cal guns - 84.44lbs / 38.30kg shells, 150 per gun
Breech loading guns in deck mounts, 1899 Model
4 x Single mounts on centreline ends, evenly spread
2 - 3.94" / 100.0 mm 45.0 cal guns - 30.78lbs / 13.96kg shells, 200 per gun
Breech loading guns in deck mounts, 1899 Model
2 x Single mounts on sides, aft deck forward
Weight of broadside 399 lbs / 181 kg
Main Torpedoes
2 - 17.7" / 450 mm, 15.75 ft / 4.80 m torpedoes - 0.538 t each, 1.076 t total
submerged bow & stern tubes
2nd Torpedoes
2 - 17.7" / 450 mm, 15.75 ft / 4.80 m torpedoes - 0.538 t each, 1.076 t total
In 2 sets of deck mounted carriage/fixed tubes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.79" / 20 mm - -
4th: 0.39" / 10 mm - -
Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 12 000 ihp / 8 952 Kw = 21.88 kts
Range 7 000nm at 10.00 kts
Bunker at max displacement = 958 tons (100% coal)
Complement:
233 - 304
Cost:
£0.380 million / $1.521 million
Distribution of weights at normal displacement:
Armament: 64 tons, 1.8 %
- Guns: 61 tons, 1.7 %
- Weapons: 3 tons, 0.1 %
Armour: 10 tons, 0.3 %
- Armament: 10 tons, 0.3 %
Machinery: 1 830 tons, 50.3 %
Hull, fittings & equipment: 1 056 tons, 29.0 %
Fuel, ammunition & stores: 640 tons, 17.6 %
Miscellaneous weights: 40 tons, 1.1 %
- Hull above water: 4 tons
- On freeboard deck: 18 tons
- Above deck: 18 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1 853 lbs / 840 Kg = 22.1 x 5.5 " / 140 mm shells or 1.2 torpedoes
Stability (Unstable if below 1.00): 2.00
Metacentric height 4.7 ft / 1.4 m
Roll period: 8.9 seconds
Steadiness - As gun platform (Average = 50 %): 73 %
- Recoil effect (Restricted arc if above 1.00): 0.06
Seaboat quality (Average = 1.00): 1.45
Hull form characteristics:
Hull has low forecastle, rise forward of midbreak,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.515 / 0.528
Length to Beam Ratio: 8.57 : 1
'Natural speed' for length: 19.84 kts
Power going to wave formation at top speed: 48 %
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 (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 15.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
- Forward deck: 8.00 %, 16.40 ft / 5.00 m, 16.40 ft / 5.00 m
- Aft deck: 62.00 %, 10.50 ft / 3.20 m, 10.50 ft / 3.20 m
- Quarter deck: 15.00 %, 10.50 ft / 3.20 m, 10.50 ft / 3.20 m
- Average freeboard: 11.36 ft / 3.46 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 169.6 %
- Above water (accommodation/working, high = better): 111.2 %
Waterplane Area: 12 215 Square feet or 1 135 Square metres
Displacement factor (Displacement / loading): 91 %
Structure weight / hull surface area: 62 lbs/sq ft or 302 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.00
- Longitudinal: 1.01
- Overall: 1.00
Cramped machinery, storage, compartmentation space
Adequate accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily