French sloops

[Korpen]

Gub-boatish is a typo. I meant gun-boatish, i.e. too many too big guns and too slow to be a destroyer. I.e. a "gunboat".

Well, is "gunboat" not a pretty good description on the job a torpedo-boat destroyer has? It is after all primary intended to outgun torpedo boats.

[maddox]

Thanks to Korpen, another design came trough.

A Pure TB, written large.

Léopard, French Heavy TB laid down 1913 (Engine 1912)

Displacement:
   1.001 t light; 1.025 t standard; 1.130 t normal; 1.214 t full load

Dimensions: Length overall / water x beam x draught
   354,33 ft / 354,33 ft x 29,07 ft x 9,84 ft (normal load)
   108,00 m / 108,00 m x 8,86 m  x 3,00 m

Armament:
      2 - 2,76" / 70,0 mm guns in single mounts, 10,47lbs / 4,75kg shells, 1913 Model
     Quick firing guns in deck mounts
     on centreline, all aft, 1 raised mount aft
   Weight of broadside 21 lbs / 9 kg
   Shells per gun, main battery: 150
   8 - 20,0" / 508 mm above water torpedoes

Machinery:
   Oil fired boilers, steam turbines,
   Direct drive, 2 shafts, 28.517 shp / 21.273 Kw = 33,00 kts
   Range 1.655nm at 16,00 kts
                Range    220nm at 33.00 kts
   Bunker at max displacement = 188 tons

Complement:
   96 - 126

Cost:
   £0,140 million / $0,559 million

Distribution of weights at normal displacement:
   Armament: 3 tons, 0,2%
   Machinery: 648 tons, 57,4%
   Hull, fittings & equipment: 310 tons, 27,4%
   Fuel, ammunition & stores: 129 tons, 11,4%
   Miscellaneous weights: 40 tons, 3,5%

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     279 lbs / 127 Kg = 26,7 x 2,8 " / 70 mm shells or 0,2 torpedoes
   Stability (Unstable if below 1.00): 1,34
   Metacentric height 1,3 ft / 0,4 m
   Roll period: 10,6 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0,03
   Seaboat quality  (Average = 1.00): 1,03

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0,391
   Length to Beam Ratio: 12,22 : 1
   'Natural speed' for length: 18,82 kts
   Power going to wave formation at top speed: 62 %
   Trim (Max stability = 0, Max steadiness = 100): 68
   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:      15,09 ft / 4,60 m
      - Forecastle (15%):   13,78 ft / 4,20 m
      - Mid (27%):      13,12 ft / 4,00 m
      - Quarterdeck (15%):   9,84 ft / 3,00 m
      - Stern:      8,86 ft / 2,70 m
      - Average freeboard:   11,82 ft / 3,60 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 190,7%
      - Above water (accommodation/working, high = better): 76,1%
   Waterplane Area: 6.310 Square feet or 586 Square metres
   Displacement factor (Displacement / loading): 48%
   Structure weight / hull surface area: 26 lbs/sq ft or 128 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,50
      - Longitudinal: 1,09
      - Overall: 0,54
   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

the misc weight is divided:
-crew comfort messures
-marconi instalation
-reserve weight for later improvements.

[Borys]

Istead of "pure" this or other , how about a balanced design?
Borys

[Korpen]

Istead of "pure" this or other , how about a balanced design?
Borys

Balanced is boring :P
France can afford to specialise.

[Borys]

Ahoj!
OK - I will NOT try a nightime forcing of the  La Manche knowing that there are two flotillas of such ships on the French side ...

Borys

[maddox]

How big is a flottilla of these tiny ships?  A hogshead full?

[P3D]

If destroyer division is say 6, a squadron 12, a flotilla should be at least 24 DD plus other ships.

[Borys]

A flotilla of such ships would be 8-12 vessels.
15 tops.
Borys

[maddox]

The first 7 are ordered at foreing yards.

[maddox]

And another set of 8 is ordered.

In HY 2 1914 the first defence flottila will be formed and active.

[Korpen]

And another set of 8 is ordered.

In HY 2 1914 the first defence flottila will be formed and active.

try and get all the diffren builders to make a drawing of the ship, would be fun to see the different styles of different yards on the same design. :)

[maddox]

If you please. I enjoy the drawings.

And you made a lot of them already.

[Guinness]

Question: do you mean to have both guns aft? Also, do all torpedoes need to be on the centerline?

[maddox]

Both guns are aft, to keep the front as clean as possible.

The Torpedo Tubes are of the double kind, and each take 9m of length. ideal to fit between the multitude of smokestacks.
Also, the ship isn't wide enough to accomodate seperate tubes on the side, unless she's a very very large MTB.   Hmmm, 8 tubes in the bow....

[Guinness]

The CSA finds multitudes of stacks to be an affront (and a waste of deck space), but we'll see what we can do.