V. (d) Fluss-Kanonbooten (River Gunboats)

[swamphen]

V. Kanonbooten (Gunboats).
..(d) Fluss-Kanonbooten (River Gunboats).
.....SMS Tsetse
.....SMS Stechmücken
.....SMS Bremsen
.....SMS Wollschweber
.....SMS Großlibellen - SUNK during taking of Hankow by RRC forces
.....SMS Kleinlibellen - SUNK during taking of Hankow by RRC forces
.....SMS Schmetterlinge - SUNK during taking of Hankow by RRC forces
.....SMS Köcherfliegen - SUNK during taking of Hankow by RRC forces

[swamphen]

Tsetse class

SMS Tsetse - all vessels laid down 1904, commissioned 1904
SMS Stechmücken
SMS Bremsen
SMS Wollschweber
SMS Großlibellen
SMS Kleinlibellen
SMS Schmetterlinge
SMS Köcherfliegen

DKB Fluss-Kanonboot laid down 1904

Displacement:
   81 t light; 88 t standard; 96 t normal; 103 t full load

Dimensions: Length overall / water x beam x draught
   124.67 ft / 124.67 ft x 20.01 ft x 1.97 ft (normal load)
   38.00 m / 38.00 m x 6.10 m  x 0.60 m

Armament:
     2 - 3.46" / 88.0 mm guns in single mounts, 22.05lbs / 10.00kg shells, 1900 Model
     Quick firing guns in deck mounts
     on centreline ends, evenly spread
     2 - 1.97" / 50.0 mm guns in single mounts, 3.86lbs / 1.75kg shells, 1903 Model
     Quick firing guns in deck mounts
     on side, all forward
     2 - 1.46" / 37.0 mm guns in single mounts, 0.99lbs / 0.45kg shells, 1896 Model
     Hotchkiss guns in deck mounts
     on side, all aft, all raised mounts
     4 - 0.30" / 7.7 mm guns in single mounts, 0.01lbs / 0.01kg shells, 1902 Model
     Machine guns in deck mounts
     on side ends, evenly spread, all raised mounts

   Weight of broadside 54 lbs / 24 kg
   Shells per gun, main battery: 150

Armour:
  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:      0.79" / 20 mm         -               -

Machinery:
   Coal and oil fired boilers, complex reciprocating steam engines,
   Direct drive, 1 shaft, 100 ihp / 74 Kw = 9.50 kts
   Range 1,000nm at 9.50 kts (Bunkerage = 15 tons) (95% coal)

Complement:
   14 - 22

Cost:
   £0.010 million / $0.041 million

Distribution of weights at normal displacement:
   Armament: 7 tons, 6.8 %
   Armour: 3 tons, 3.0 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 3 tons, 3.0 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 14 tons, 14.7 %
   Hull, fittings & equipment: 53 tons, 55.4 %
   Fuel, ammunition & stores: 15 tons, 16.0 %
   Miscellaneous weights: 4 tons, 4.2 %
      - 4 tons, 5 350-kg mines

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     159 lbs / 72 Kg = 7.7 x 3.5 " / 88 mm shells or 0.3 torpedoes
   Stability (Unstable if below 1.00): 1.26
   Metacentric height 0.7 ft / 0.2 m
   Roll period: 10.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.17
   Seaboat quality  (Average = 1.00): 0.81

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.685
   Length to Beam Ratio: 6.23 : 1
   'Natural speed' for length: 11.17 kts
   Power going to wave formation at top speed: 32 %
   Trim (Max stability = 0, Max steadiness = 100): 87
   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:         4.59 ft / 1.40 m
      - Forecastle (20 %):      3.94 ft / 1.20 m
      - Mid (50 %):      3.94 ft / 1.20 m
      - Quarterdeck (15 %):   3.94 ft / 1.20 m
      - Stern:         3.94 ft / 1.20 m
      - Average freeboard:      3.99 ft / 1.22 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 105.4 %
      - Above water (accommodation/working, high = better): 104.8 %
   Waterplane Area: 1,956 Square feet or 182 Square metres
   Displacement factor (Displacement / loading): 110 %
   Structure weight / hull surface area: 23 lbs/sq ft or 115 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.99
      - Longitudinal: 1.07
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is adequate
   Room for accommodation and workspaces is adequate
   Ship has slow, easy roll, a good, steady gun platform
   Poor seaboat, wet and uncomfortable, reduced performance in heavy weather