Harbor Defense

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Q H baozhen, Middle kingdom  ******* barge laid down 1904

Displacement:
   199 t light; 219 t standard; 222 t normal; 224 t full load

Dimensions: Length overall / water x beam x draught
   91,86 ft / 91,86 ft x 22,97 ft x 4,92 ft (normal load)
   28,00 m / 28,00 m x 7,00 m  x 1,50 m

Armament:
      6 - 0,98" / 25,0 mm guns in single mounts, 0,48lbs / 0,22kg shells, 1904 Model
     Machine guns in deck mounts
     on side, evenly spread
   Weight of broadside 3 lbs / 1 kg
   Shells per gun, main battery: 10.000
   Classified

Armour:
   - Belts:      Width (max)   Length (avg)      Height (avg)
   Main:   1,97" / 50 mm     88,58 ft / 27,00 m   7,38 ft / 2,25 m
   Ends:   Unarmoured
     Main Belt covers 148% of normal length

   - Gun armour:   Face (max)   Other gunhouse (avg)   Barbette/hoist (max)
   Main:   0,79" / 20 mm         -               -

   - Armour deck: 1,97" / 50 mm

Machinery:
   Coal fired boilers, complex reciprocating steam engines,
   Direct drive, 1 shaft, 30 ihp / 22 Kw = 6,00 kts
   Range 1.000nm at 4,00 kts
   Bunker at max displacement = 5 tons (100% coal)

Complement:
   28 - 37

Cost:
   £0,008 million / $0,031 million

Distribution of weights at normal displacement:
   Armament: 0 tons, 0,2%
   Armour: 117 tons, 52,6%
      - Belts: 52 tons, 23,3%
      - Torpedo bulkhead: 0 tons, 0,0%
      - Armament: 1 tons, 0,4%
      - Armour Deck: 64 tons, 28,9%
      - Conning Tower: 0 tons, 0,0%
   Machinery: 4 tons, 2,0%
   Hull, fittings & equipment: 47 tons, 21,3%
   Fuel, ammunition & stores: 23 tons, 10,5%
   Miscellaneous weights: 30 tons, 13,5%

Overall survivability and seakeeping ability:
   Survivability (Non-critical penetrating hits needed to sink ship):
     -100 lbs / -45 Kg = -210,3 x 1,0 " / 25 mm shells or NaN (Niet-een-getal) torpedoes
   Stability (Unstable if below 1.00): 1,36
   Metacentric height 0,9 ft / 0,3 m
   Roll period: 9,9 seconds
   Steadiness   - As gun platform (Average = 50 %): 78 %
         - Recoil effect (Restricted arc if above 1.00): 0,00
   Seaboat quality  (Average = 1.00): 1,41

Hull form characteristics:
   Hull has raised quarterdeck
   Block coefficient: 0,748
   Length to Beam Ratio: 4,00 : 1
   'Natural speed' for length: 9,58 kts
   Power going to wave formation at top speed: 31 %
   Trim (Max stability = 0, Max steadiness = 100): 55
   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:      5,91 ft / 1,80 m
      - Forecastle (20%):   3,94 ft / 1,20 m
      - Mid (50%):      3,28 ft / 1,00 m
      - Quarterdeck (15%):   3,94 ft / 1,20 m (3,28 ft / 1,00 m before break)
      - Stern:      3,94 ft / 1,20 m
      - Average freeboard:   3,77 ft / 1,15 m
   Ship tends to be wet forward

Ship space, strength and comments:
   Space   - Hull below water (magazines/engines, low = better): -229,2%
      - Above water (accommodation/working, high = better): 41,2%
   Waterplane Area: 1.764 Square feet or 164 Square metres
   Displacement factor (Displacement / loading): 140%
   Structure weight / hull surface area: 22 lbs/sq ft or 108 Kg/sq metre
   Hull strength (Relative):
      - Cross-sectional: 0,95
      - Longitudinal: 1,62
      - Overall: 1,00
   Hull space for machinery, storage, compartmentation is excellent
   Room for accommodation and workspaces is extremely poor
   Ship has slow, easy roll, a good, steady gun platform
   Good seaboat, rides out heavy weather easily

The 10 tons misc weight is a mast , sail and rigging.

Ships:
Baozhen (5) laid down 1903