1905 DKB Großes Kanonboot

[swamphen]

The only new design scheduled for the 1905 Brandenburgian budget.

(I will have to re-sim the 1904 kleiner kreuzer and großes torpedobooten, however, as both had units scheduled for 1905 and they are way, way over the new per-shaft HP limits...)


SMS Delfin, German Großes Kanonboot laid down 1905

Displacement:
   300 t light; 319 t standard; 322 t normal; 325 t full load

Dimensions: Length overall / water x beam x draught
   131.23 ft / 131.23 ft x 30.35 ft x 3.61 ft (normal load)
   40.00 m / 40.00 m x 9.25 m  x 1.10 m

Armament:
      1 - 12.01" / 305 mm guns in single mounts, 859.80lbs / 390.00kg shells, 1903 Model
     Breech loading gun in deck mount
     on centreline forward
      1 - 1.46" / 37.0 mm guns in single mounts, 1.10lbs / 0.50kg shells, 1905 Model
     Breech loading gun in deck mount
     on side aft

   Weight of broadside 861 lbs / 391 kg
   Shells per gun, main battery: 27

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:      0.98" / 25 mm   131.23 ft / 40.00 m   9.35 ft / 2.85 m
   Ends:      Unarmoured
     Main Belt covers 154 % of normal length

Machinery:
   Petrol Internal combustion motors,
   Direct drive, 1 shaft, 25 shp / 19 Kw = 5.10 kts
   Range 500nm at 5.00 kts (Bunkerage = 6 tons)
     Caution: Delicate, lightweight machinery

Complement:
   37 - 49

Cost:
   £0.102 million / $0.407 million

Distribution of weights at normal displacement:
   Armament: 108 tons, 33.6 %
   Armour: 43 tons, 13.4 %
      - Belts: 43 tons, 13.4 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 0 tons, 0.0 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 1 tons, 0.2 %
   Hull, fittings & equipment: 147 tons, 45.6 %
   Fuel, ammunition & stores: 23 tons, 7.1 %
   Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     61 lbs / 27 Kg = 0.1 x 12.0 " / 305 mm shells or 0.1 torpedoes
   Stability (Unstable if below 1.00): 1.59
   Metacentric height 1.8 ft / 0.6 m
   Roll period: 9.5 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.59
   Seaboat quality  (Average = 1.00): 1.07

Hull form characteristics:
   Hull has raised forecastle, raised quarterdeck
   Block coefficient: 0.785
   Length to Beam Ratio: 4.32 : 1
   'Natural speed' for length: 11.46 kts
   Power going to wave formation at top speed: 15 %
   Trim (Max stability = 0, Max steadiness = 100): 66
   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:         8.20 ft / 2.50 m
      - Forecastle (20 %):      7.38 ft / 2.25 m (5.74 ft / 1.75 m aft of break)
      - Mid (50 %):      5.74 ft / 1.75 m
      - Quarterdeck (15 %):   6.56 ft / 2.00 m (5.74 ft / 1.75 m before break)
      - Stern:         7.38 ft / 2.25 m
      - Average freeboard:      6.32 ft / 1.93 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 236.1 %
      - Above water (accommodation/working, high = better): 102.0 %
   Waterplane Area: 3,453 Square feet or 321 Square metres
   Displacement factor (Displacement / loading): 35 %
   Structure weight / hull surface area: 36 lbs/sq ft or 178 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.55
      - Longitudinal: 1.36
      - Overall: 0.60
   Caution: Hull subject to strain in open-sea
   Hull space for machinery, storage, compartmentation is extremely poor
   Room for accommodation and workspaces is adequate
   Ship has slow, easy roll, a good, steady gun platform

[Desertfox]

Am I seeing correctly? Is that a 12" gun?!!! :-O

[swamphen]

Historically the Italians had a number of boats of this type during WWI - in fact, the 12"-armed ones mounted TWO!

(Which I have had absolutely 0 success 'Sharping, BTW.)

[Borys]

Ahoj!
I suspect the vessel's combat success to be similiar to yours with SS :)

Borys

[Desertfox]

Borys why do you worry about mounting a 7.5" gun in a 3,000 ton vessel????

[maddox]

Faa Di Bruno for example.  equaly Unsimmable.

I see possibilities.

[swamphen]

In Nv2.0 these were to be based in Kuwait for future nefarious purposes. Having traded in said "ex-Norman" colony on some shiny new islands these (and some of the FKb types) will instead be assigned to the Rift Valley Channel where they will be performing the occasional spot of wog-bashing...