France - La jeune école

Jefgte · June 11, 2013, 06:23:41 PM

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

Jefgte · June 12, 2013, 05:02:11 PM

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

Jefgte · June 13, 2013, 04:47:03 AM

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

France - La jeune école

Jefgte

Jefgte

Jefgte