V. (b) Großes Kanonbooten (Large Gunboats)

[swamphen]

V. Kanonbooten (Gunboats).
..(b) Großes Kanonbooten (Large Gunboats).
.....SMS Panther
.....SMS Löwe
.....SMS Delfin
.....SMS Möwe
.....SMS Drache

[swamphen]

Panther class

SMS Panther - laid down 1904, commissioned 1904 - SUNK in the Battle off New Zion, 26 January 1908
SMS Löwe - laid down 1904, commissioned 1905 - SUNK in the Battle off New Zion, 26 January 1908

DKB Großes Kanonboot laid down 1904

Displacement:
   466 t light; 504 t standard; 512 t normal; 519 t full load

Dimensions: Length overall / water x beam x draught
   170.60 ft / 164.04 ft x 41.01 ft x 4.10 ft (normal load)
   52.00 m / 50.00 m x 12.50 m  x 1.25 m

Armament:
      2 - 6.69" / 170 mm guns (1x2 guns), 149.91lbs / 68.00kg shells, 1899 Model
     Breech loading guns in a turret (on a barbette)
     on centreline forward, all raised guns
      1 - 3.46" / 88.0 mm guns in single mounts, 22.05lbs / 10.00kg shells, 1900 Model
     Quick firing gun in deck mount
     on centreline aft
      2 - 1.46" / 37.0 mm guns in single mounts, 0.99lbs / 0.45kg shells, 1896 Model
     Quick firing guns in deck mounts
     on side, all amidships, all raised mounts

   Weight of broadside 324 lbs / 147 kg
   Shells per gun, main battery: 150

Armour:
   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:      1.57" / 40 mm   0.79" / 20 mm      0.79" / 20 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 1 shaft, 100 ihp / 75 Kw = 7.18 kts
   Range 1,000nm at 5.00 kts (Bunkerage = 15 tons)

Complement:
   53 - 70

Cost:
   £0.052 million / $0.209 million

Distribution of weights at normal displacement:
   Armament: 40 tons, 7.9 %
   Armour: 13 tons, 2.6 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 13 tons, 2.6 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 15 tons, 2.9 %
   Hull, fittings & equipment: 398 tons, 77.7 %
   Fuel, ammunition & stores: 46 tons, 9.0 %
   Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     891 lbs / 404 Kg = 5.9 x 6.7 " / 170 mm shells or 0.8 torpedoes
   Stability (Unstable if below 1.00): 1.06
   Metacentric height 1.5 ft / 0.4 m
   Roll period: 14.2 seconds
   Steadiness   - As gun platform (Average = 50 %): 71 %
         - Recoil effect (Restricted arc if above 1.00): 0.25
   Seaboat quality  (Average = 1.00): 0.71

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.650
   Length to Beam Ratio: 4.00 : 1
   'Natural speed' for length: 12.81 kts
   Power going to wave formation at top speed: 21 %
   Trim (Max stability = 0, Max steadiness = 100): 99
   Bow angle (Positive = bow angles forward): -10.00 degrees
   Stern overhang: 6.56 ft / 2.00 m
   Freeboard (% = measuring location as a percentage of overall length):
      - Stem:         4.92 ft / 1.50 m
      - Forecastle (20 %):      4.92 ft / 1.50 m
      - Mid (50 %):      4.92 ft / 1.50 m
      - Quarterdeck (15 %):   4.92 ft / 1.50 m
      - Stern:         4.92 ft / 1.50 m
      - Average freeboard:      4.92 ft / 1.50 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 70.8 %
      - Above water (accommodation/working, high = better): 89.9 %
   Waterplane Area: 5,081 Square feet or 472 Square metres
   Displacement factor (Displacement / loading): 140 %
   Structure weight / hull surface area: 73 lbs/sq ft or 357 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 1.00
      - Longitudinal: 1.74
      - Overall: 1.06
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is cramped
   Ship has slow, easy roll, a good, steady gun platform
   Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

[swamphen]

Delfin class

SMS Delfin - laid down 1905, commissioned 1906 - SUNK in the Battle off New Zion, 26 January 1908
SMS Möwe - laid down 1906, commissioned 1906 - SUNK in the Battle off New Zion, 26 January 1908

DKB 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

[swamphen]

ex-Japanese Heien class

SMS Drache (ex-IJN Heien) - laid down 1883, commissioned 1884, refit 1900, acquired 1908, sunk 27 February 1908

DKB (ex-Nipponese) Großes Kanonboot laid down 1883

Displacement:
   1,828 t light; 1,932 t standard; 2,148 t normal; 2,321 t full load

Dimensions: Length overall / water x beam x draught
   199.97 ft / 199.97 ft x 40.03 ft x 13.62 ft (normal load)
   60.95 m / 60.95 m x 12.20 m  x 4.15 m

Armament:
      1 - 10.24" / 260 mm guns in single mounts, 479.97lbs / 217.71kg shells, 1883 Model
     Breech loading gun in Coles/Ericsson turret
     on centreline forward
      2 - 6.00" / 152 mm guns in single mounts, 96.66lbs / 43.84kg shells, 1883 Model
     Breech loading guns in deck mounts
     on side, all amidships, all raised mounts - superfiring
      8 - 1.85" / 47.0 mm guns in single mounts, 2.84lbs / 1.29kg shells, 1883 Model
     Quick firing guns in deck mounts
     on side, evenly spread
   Weight of broadside 696 lbs / 316 kg
   Shells per gun, main battery: 150
   4 - 17.7" / 450 mm submerged torpedo tubes

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   7.87" / 200 mm   164.04 ft / 50.00 m   7.58 ft / 2.31 m
   Ends:   Unarmoured
     Main Belt covers 126 % of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   5.00" / 127 mm   2.36" / 60 mm            -

   - Armour deck: 1.97" / 50 mm, Conning tower: 5.00" / 127 mm

Machinery:
   Coal fired boilers, simple reciprocating steam engines,
   Direct drive, 2 shafts, 636 ihp / 474 Kw = 10.00 kts
   Range 2,500nm at 10.00 kts (Bunkerage = 389 tons)

Complement:
   157 - 205

Cost:
   £0.155 million / $0.619 million

Distribution of weights at normal displacement:
   Armament: 87 tons, 4.0 %
   Armour: 748 tons, 34.8 %
      - Belts: 416 tons, 19.4 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 82 tons, 3.8 %
      - Armour Deck: 232 tons, 10.8 %
      - Conning Tower: 18 tons, 0.8 %
   Machinery: 126 tons, 5.9 %
   Hull, fittings & equipment: 767 tons, 35.7 %
   Fuel, ammunition & stores: 321 tons, 14.9 %
   Miscellaneous weights: 100 tons, 4.7 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     2,762 lbs / 1,253 Kg = 5.8 x 10.2 " / 260 mm shells or 1.0 torpedoes
   Stability (Unstable if below 1.00): 1.12
   Metacentric height 1.6 ft / 0.5 m
   Roll period: 13.4 seconds
   Steadiness   - As gun platform (Average = 50 %): 100 %
         - Recoil effect (Restricted arc if above 1.00): 0.68
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has a flush deck
   Block coefficient: 0.690
   Length to Beam Ratio: 5.00 : 1
   'Natural speed' for length: 14.14 kts
   Power going to wave formation at top speed: 37 %
   Trim (Max stability = 0, Max steadiness = 100): 50
   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:      10.17 ft / 3.10 m
      - Forecastle (20 %):   10.17 ft / 3.10 m
      - Mid (50 %):      10.17 ft / 3.10 m
      - Quarterdeck (15 %):   10.17 ft / 3.10 m
      - Stern:      10.17 ft / 3.10 m
      - Average freeboard:   10.17 ft / 3.10 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 68.6 %
      - Above water (accommodation/working, high = better): 78.5 %
   Waterplane Area: 6,358 Square feet or 591 Square metres
   Displacement factor (Displacement / loading): 120 %
   Structure weight / hull surface area: 83 lbs/sq ft or 408 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.90
      - Longitudinal: 3.29
      - Overall: 1.03
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is cramped
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather