IX. (a) Öldampfer (Oilers)

[Sachmle]

Lae
Rabaul

DKB Öldampfer laid down 1917 (Engine 1916)

Displacement:
   4,445 t light; 4,674 t standard; 11,188 t normal; 16,399 t full load

Dimensions: Length overall / water x beam x draught
   393.70 ft / 393.70 ft x 65.62 ft x 22.97 ft (normal load)
   120.00 m / 120.00 m x 20.00 m  x 7.00 m

Armament:
     2 - 3.46" / 88.0 mm guns in single mounts, 22.05lbs / 10.00kg shells, 1910 Model
     Quick firing guns in deck mounts
     on side, all aft
     4 - 1.97" / 50.0 mm guns in single mounts, 3.86lbs / 1.75kg shells, 1905 Model
     Quick firing guns in deck mounts
     on side, all forward
   Weight of broadside 60 lbs / 27 kg
   Shells per gun, main battery: 150

Armour:
  - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0.98" / 25 mm         -               -

Machinery:
   Coal and oil fired boilers, complex reciprocating steam engines,
   Direct drive, 2 shafts, 12,156 ihp / 9,068 Kw = 18.00 kts
   Range 47,500nm at 12.00 kts
   Bunker at max displacement = 11,725 tons (40% coal)

Complement:
   543 - 707

Cost:
   £0.484 million / $1.938 million

Distribution of weights at normal displacement:
   Armament: 7 tons, 0.1 %
   Armour: 4 tons, 0.0 %
      - Belts: 0 tons, 0.0 %
      - Torpedo bulkhead: 0 tons, 0.0 %
      - Armament: 4 tons, 0.0 %
      - Armour Deck: 0 tons, 0.0 %
      - Conning Tower: 0 tons, 0.0 %
   Machinery: 750 tons, 6.7 %
   Hull, fittings & equipment: 2,284 tons, 20.4 %
   Fuel, ammunition & stores: 6,743 tons, 60.3 %
   Miscellaneous weights: 1,400 tons, 12.5 %

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     33,330 lbs / 15,118 Kg = 1,602.9 x 3.5 " / 88 mm shells or 5.2 torpedoes
   Stability (Unstable if below 1.00): 1.69
   Metacentric height 6.3 ft / 1.9 m
   Roll period: 10.9 seconds
   Steadiness   - As gun platform (Average = 50 %): 70 %
         - Recoil effect (Restricted arc if above 1.00): 0.00
   Seaboat quality  (Average = 1.00): 2.00

Hull form characteristics:
   Hull has raised forecastle, raised quarterdeck
   Block coefficient: 0.660
   Length to Beam Ratio: 6.00 : 1
   'Natural speed' for length: 19.84 kts
   Power going to wave formation at top speed: 48 %
   Trim (Max stability = 0, Max steadiness = 100): 35
   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:      21.00 ft / 6.40 m
      - Forecastle (25 %):   21.00 ft / 6.40 m (13.94 ft / 4.25 m aft of break)
      - Mid (50 %):      13.94 ft / 4.25 m
      - Quarterdeck (20 %):   20.51 ft / 6.25 m (13.94 ft / 4.25 m before break)
      - Stern:      20.51 ft / 6.25 m
      - Average freeboard:   17.02 ft / 5.19 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): 37.3 %
      - Above water (accommodation/working, high = better): 97.7 %
   Waterplane Area: 19,972 Square feet or 1,855 Square metres
   Displacement factor (Displacement / loading): 378 %
   Structure weight / hull surface area: 78 lbs/sq ft or 380 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0.94
      - Longitudinal: 1.79
      - Overall: 1.00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is adequate
   Ship has slow, easy roll, a good, steady gun platform
   Excellent seaboat, comfortable, can fire her guns in the heaviest weather

1000t Loading Equipment
200t Bunkerage
100t Surplus Stores
50 Reserve Weight
25t Markoni Installation
25t Sehendes Auge