WesWorld

Repository for data pertaining to vessels which are preserved as museum ships

Hai Chi
Protected Cruiser (CA-Version)



Ships in Class:
Hai Chi laid down 1897; preserved as museum ship at Shanghai


Displacement:
4,566 t light; 4,762 t standard; 5,324 t normal; 5,752 t full load
Loading submergence 381 tons/feet

Dimensions:
424.00 ft x 47.00 ft x 17.00 ft (normal load)
129.24 m x 14.33 m x 5.18 m

Armament:
2 - 8.00" / 203 mm guns
10 - 4.70" / 119 mm guns
12 - 1.85" / 47 mm QF guns
4 - 1.18" / 30 mm guns
Weight of broadside 1,072 lbs / 486 kg
5 - 18.0" / 457.2 mm above water torpedoes

Armour:
Belt 1.00" / 25 mm, ends unarmoured
Belts cover 150 % of normal area
Main gun shields 3.00" / 76 mm
Armour deck 2.00" / 51 mm, Conning tower 3.00" / 76 mm

Machinery:
Coal fired boilers, complex reciprocating steam engines,
Direct drive, 3 shafts, 12,692 ihp / 9,469 Kw = 21.00 kts
Range 5,500nm at 10.00 kts

Complement:
311 - 405

Cost:
£30.564 million / $2.255 million

Distribution of weights at normal displacement:
Armament: 134 tons, 2.5 %
Armour: 671 tons, 12.6 %
Belts: 141 tons, 2.6 %, Armament: 16 tons, 0.3 %, Armour Deck: 494 tons, 9.3 %
Conning Tower: 20 tons, 0.4 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 2,081 tons, 39.1 %
Hull, fittings & equipment: 1,681 tons, 31.6 %
Fuel, ammunition & stores: 757 tons, 14.2 %
Miscellaneous weights: 0 tons, 0.0 %

Metacentric height 3.2

Remarks:
Hull space for machinery, storage & compartmentation is cramped
Room for accommodation & workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable and able to fight her guns in the heaviest weather

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.50
Shellfire needed to sink: 2,962 lbs / 1,343 Kg = 11.6 x 8.0 " / 203 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 0.7
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 78 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.20
Relative quality as seaboat: 1.56

Hull form characteristics:
Block coefficient: 0.550
Sharpness coefficient: 0.36
Hull speed coefficient 'M': 7.42
'Natural speed' for length: 20.59 kts
Power going to wave formation at top speed: 45 %
Trim: 50
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 145.8 %
Relative accommodation and working space: 92.8 %
(Average = 100%)
Displacement factor: 90 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.99
(Structure weight / hull surface area: 79 lbs / square foot or 386 Kg / square metre)
Relative longitudinal hull strength: 1.20
(for 13.00 ft / 3.96 m average freeboard, freeboard adjustment -0.35 ft)
Relative composite hull strength: 1.01

Typ I
Test Submarine

Ships in Class:
U - 1 laid down 1931; preserved as museum ship at Dairen


Displacement:
537 t light; 549 t standard; 607 t normal; 653 t full load

Dimensions:
Length overall / water x beam x draught
190,62 ft / 187,99 ft x 19,69 ft x 11,48 ft (normal load)
58,10 m / 57,30 m x 6,00 m x 3,50 m
4 - 18,0" / 457 mm submerged torpedo tubes

Armour:
- Conning tower: 0,98" / 25 mm

Machinery:
Diesel Internal combustion generators plus batteries,
Electric motors, 2 shafts, 899 shp / 671 Kw = 14,00 kts
Range 6.000nm at 10,00 kts
Bunker at max displacement = 104 tons

Complement:
60 - 79

Cost:
£0,098 million / $0,394 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0,0%
Armour: 2 tons, 0,3%
- Belts: 0 tons, 0,0%
- Torpedo bulkhead: 0 tons, 0,0%
- Armament: 0 tons, 0,0%
- Armour Deck: 0 tons, 0,0%
- Conning Tower: 2 tons, 0,3%
Machinery: 27 tons, 4,4%
Hull, fittings & equipment: 358 tons, 59,0%
Fuel, ammunition & stores: 70 tons, 11,6%
Miscellaneous weights: 150 tons, 24,7%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
444 lbs / 201 Kg = 4,1 x 6 " / 152 mm shells or 0,5 torpedoes
Stability (Unstable if below 1.00): 1,04
Metacentric height 0,5 ft / 0,1 m
Roll period: 12,1 seconds
Steadiness - As gun platform (Average = 50 %): 0 %
- Recoil effect (Restricted arc if above 1.00): 0,00
Seaboat quality (Average = 1.00): 0,00

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0,500
Length to Beam Ratio: 9,55 : 1
'Natural speed' for length: 13,71 kts
Power going to wave formation at top speed: 42 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 20,00 degrees
Stern overhang: 2,62 ft / 0,80 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 0,00 ft / 0,00 m
- Forecastle (18%): 0,00 ft / 0,00 m
- Mid (50%): 0,00 ft / 0,00 m
- Quarterdeck (18%): 0,00 ft / 0,00 m
- Stern: 0,00 ft / 0,00 m
- Average freeboard: 0,00 ft / 0,00 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 69,6%
- Above water (accommodation/working, high = better): 0,0%
Waterplane Area: 2.466 Square feet or 229 Square metres
Displacement factor (Displacement / loading): 296%
Structure weight / hull surface area: 101 lbs/sq ft or 491 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 3,94
- Longitudinal: 1,87
- Overall: 2,26
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is extremely poor
Ship has quick, lively roll, not a steady gun platform
Caution: Lacks seaworthiness - very limited seakeeping ability