A few class of ships, specialy TBs & ATs are too far of the specifications of La Jeune Ecole".
I start to reSS them - same displacement, same year
Hulls of the TBs are realy too tall in comparison of the TBs class of that period.
The exercices of the fleet, specialy between Bizerte & Toulon made every year since 1891 are very difficult for the small TBs - 38m & other 150t.
Only ATs could do the job vs the BBs & cruisers. So, Admiralty increase the sizes of the TBs to do the job.
T17 to T36, France TB2-450t laid down 1898
Displacement:
450 t light; 464 t standard; 518 t normal; 561 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(212.50 ft / 212.50 ft) x 22.97 ft x (9.40 / 9.91 ft)
(64.77 m / 64.77 m) x 7.00 m x (2.87 / 3.02 m)
Armament:
2 - 2.95" / 75.0 mm 45.0 cal guns - 12.97lbs / 5.88kg shells, 120 per gun
Quick firing guns in deck mounts, 1898 Model
2 x Single mounts on centreline ends, evenly spread
1 raised mount - superfiring
2 - 2.95" / 75.0 mm 46.5 cal guns - 13.33lbs / 6.04kg shells, 120 per gun
Quick firing guns in deck mounts, 1898 Model
2 x Single mounts on sides, forward deck aft
2 - 0.32" / 8.0 mm 76.0 cal guns - 0.02lbs / 0.01kg shells, 500 per gun
Machine guns in deck mounts, 1898 Model
2 x Single mounts on sides, forward deck centre
2 raised mounts
Weight of broadside 53 lbs / 24 kg
Main Torpedoes
2 - 15.8" / 400 mm, 15.66 ft / 4.77 m torpedoes - 0.415 t each, 0.830 t total
submerged bow tubes
2nd Torpedoes
2 - 15.8" / 400 mm, 15.66 ft / 4.77 m torpedoes - 0.415 t each, 0.830 t total
In 2 sets of deck mounted centre rotating tubes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.20" / 5 mm - -
Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 7 800 ihp / 5 819 Kw = 25.26 kts
Range 2 200nm at 10.00 kts
Bunker at max displacement = 98 tons (100% coal)
Caution: Delicate, lightweight machinery
Complement:
53 - 70
Cost:
£0.062 million / $0.247 million
Distribution of weights at normal displacement:
Armament: 14 tons, 2.6 %
- Guns: 10 tons, 2.0 %
- Weapons: 3 tons, 0.6 %
Armour: 1 tons, 0.2 %
- Armament: 1 tons, 0.2 %
Machinery: 309 tons, 59.7 %
Hull, fittings & equipment: 116 tons, 22.4 %
Fuel, ammunition & stores: 68 tons, 13.2 %
Miscellaneous weights: 10 tons, 1.9 %
- On freeboard deck: 10 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
98 lbs / 44 Kg = 7.6 x 3.0 " / 75 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.36
Metacentric height 0.9 ft / 0.3 m
Roll period: 9.9 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.16
Seaboat quality (Average = 1.00): 1.01
Hull form characteristics:
Hull has low forecastle, rise forward of midbreak,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.395 / 0.406
Length to Beam Ratio: 9.25 : 1
'Natural speed' for length: 14.58 kts
Power going to wave formation at top speed: 66 %
Trim (Max stability = 0, Max steadiness = 100): 70
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: 20.00 %, 10.82 ft / 3.30 m, 11.82 ft / 3.60 m
- Forward deck: 6.00 %, 13.12 ft / 4.00 m, 13.12 ft / 4.00 m
- Aft deck: 49.00 %, 9.00 ft / 2.74 m, 8.20 ft / 2.50 m
- Quarter deck: 25.00 %, 8.20 ft / 2.50 m, 7.55 ft / 2.30 m
- Average freeboard: 9.25 ft / 2.82 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 209.4 %
- Above water (accommodation/working, high = better): 71.7 %
Waterplane Area: 2 995 Square feet or 278 Square metres
Displacement factor (Displacement / loading): 20 %
Structure weight / hull surface area: 21 lbs/sq ft or 103 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.85
- Overall: 0.57
Extremely poor machinery, storage, compartmentation space
Cramped accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
This TB class could carry 8 mines
Trial speed:28.5kts
Bonus:3.25
AT1 & AT2 class are going to be redraw similar to Dague class
Always 1540t - (possible SS fine adjustements)
http://fr.wikipedia.org/wiki/Classe_Bombe
Jef
Always shorter hull for a nicer & compact drawing
T37 to T64, France TB3-500t laid down 1899
Displacement:
500 t light; 517 t standard; 595 t normal; 657 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(229.00 ft / 229.00 ft) x 25.27 ft x (9.39 / 10.01 ft)
(69.80 m / 69.80 m) x 7.70 m x (2.86 / 3.05 m)
Armament:
2 - 2.95" / 75.0 mm 45.0 cal guns - 12.97lbs / 5.88kg shells, 150 per gun
Quick firing guns in deck mounts, 1899 Model
2 x Single mounts on centreline ends, evenly spread
1 raised mount - superfiring
2 - 2.95" / 75.0 mm 45.0 cal guns - 12.97lbs / 5.88kg shells, 150 per gun
Quick firing guns in deck mounts, 1899 Model
2 x Single mounts on sides, forward deck aft
2 - 0.32" / 8.0 mm 76.0 cal guns - 0.02lbs / 0.01kg shells, 500 per gun
Machine guns in deck mounts, 1899 Model
2 x Single mounts on sides, forward deck centre
Weight of broadside 52 lbs / 24 kg
Main Torpedoes
2 - 17.7" / 450 mm, 16.15 ft / 4.92 m torpedoes - 0.550 t each, 1.100 t total
In 2 sets of deck mounted centre rotating tubes
2nd Torpedoes
2 - 17.7" / 450 mm, 16.15 ft / 4.92 m torpedoes - 0.550 t each, 1.100 t total
In 2 sets of deck mounted centre rotating tubes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.20" / 5 mm - -
Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 2 shafts, 7 920 ihp / 5 908 Kw = 25.11 kts
Range 3 000nm at 10.00 kts
Bunker at max displacement = 140 tons (100% coal)
Caution: Delicate, lightweight machinery
Complement:
59 - 78
Cost:
£0.069 million / $0.276 million
Distribution of weights at normal displacement:
Armament: 14 tons, 2.4 %
- Guns: 10 tons, 1.7 %
- Weapons: 4 tons, 0.7 %
Armour: 1 tons, 0.1 %
- Armament: 1 tons, 0.1 %
Machinery: 349 tons, 58.7 %
Hull, fittings & equipment: 126 tons, 21.2 %
Fuel, ammunition & stores: 94 tons, 15.9 %
Miscellaneous weights: 10 tons, 1.7 %
- On freeboard deck: 10 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
125 lbs / 57 Kg = 9.7 x 3.0 " / 75 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.34
Metacentric height 1.1 ft / 0.3 m
Roll period: 10.3 seconds
Steadiness - As gun platform (Average = 50 %): 72 %
- Recoil effect (Restricted arc if above 1.00): 0.11
Seaboat quality (Average = 1.00): 1.00
Hull form characteristics:
Hull has low forecastle, rise forward of midbreak,
a ram bow and a cruiser stern
Block coefficient (normal/deep): 0.383 / 0.397
Length to Beam Ratio: 9.06 : 1
'Natural speed' for length: 15.13 kts
Power going to wave formation at top speed: 63 %
Trim (Max stability = 0, Max steadiness = 100): 72
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: 20.00 %, 10.82 ft / 3.30 m, 11.80 ft / 3.60 m
- Forward deck: 6.00 %, 12.48 ft / 3.80 m, 12.48 ft / 3.80 m
- Aft deck: 56.00 %, 8.52 ft / 2.60 m, 8.30 ft / 2.53 m
- Quarter deck: 18.00 %, 8.30 ft / 2.53 m, 8.20 ft / 2.50 m
- Average freeboard: 9.22 ft / 2.81 m
Ship tends to be wet forward
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 193.9 %
- Above water (accommodation/working, high = better): 52.1 %
Waterplane Area: 3 522 Square feet or 327 Square metres
Displacement factor (Displacement / loading): 23 %
Structure weight / hull surface area: 21 lbs/sq ft or 104 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.36
- Overall: 0.55
Cramped machinery, storage, compartmentation space
Cramped accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Trial Speed: 28kts
Bonus:2.76