WesWorld

Repository for information relating to large destroyers, flotilla leaders

Yiangtan - Class:
HICMS Yiangtan ( DDL-01 ) - Active
HICMS Dalian ( DDL-02 ) - Active


Yiyang - Class:
HICMS Jingxing ( DDL-03 ) - Active
HICMS Gaoyi ( DDL-04 ) - Active
HICMS Pingshan ( DDL-05 ) - Active
HICMS Gaocheng ( DDL-06 ) - Active


Zhengzhou - Class (ex Greek Leon - Class):
HICMS Zhengzhou ( DDL-07 ) - Active
HICMS Haikou ( DDL-08 ) - Active
HICMS Lanzhou ( DDL-09 ) - Active
HICMS Changchun ( DDL-10 ) - Active

Yingtan - Class
Destroyer Leader


Dimensions:
Length, 120.0 m x Beam, 12.0 m x Depth, 4.2 m
2439 tonnes normal displacement (2189 tonnes standard)

Armament:
Main battery: 6 x 14.0-cm
Secondary battery: 8 x 3.5-cm
AA battery: 4 x 1.5-cm

Weight of broadside: 233 kg

8 TT, 53.3 cm

Hull unarmored
Conning tower, 3.0 cm

Battery armor:
Main, 3.0 cm shields / secondary, 2.0 cm shields
AA, 2.0 cm shields

Maximum speed for 36006 shaft kw = 33.44 knots
Approximate cruising radius, 7500 nm / 12 knots

Typical complement: 174-226

Estimated cost, $5.340 million (£1.335 million)

Remarks:

Caution: Hull structure is subject to strain in open-sea conditions.

Magazines and engineering spaces are cramped, with poor watertight subdivision.


Distribution of weights:
Percent
normal
displacement:

Armament ......................... 64 tonnes = 3 pct
Armor, total ..................... 21 tonnes = 1 pct

C.T. 5 tonnes = 0 pct
Armament 16 tonnes = 1 pct

Machinery ........................ 1188 tonnes = 49 pct
Hull and fittings; equipment ..... 734 tonnes = 30 pct
Fuel, ammunition, stores ......... 342 tonnes = 14 pct
Miscellaneous weights ............ 90 tonnes = 4 pct
-----
2439 tonnes = 100 pct

Estimated metacentric height, 0.6 m

Displacement summary:

Light ship: 2098 tonnes
Standard displacement: 2189 tonnes
Normal service: 2439 tonnes
Full load: 2629 tonnes

Loading submergence 786 tonnes/metre

+++++++++++++++++++++++++


Estimated overall survivability and seakeeping ability:

Relative margin of stability: 1.27

Shellfire needed to sink: 297 kg = 7.8 x 14.0-cm shells (Approximates weight of penetrating shell hits needed to sink ship, not counting critical hits)

Torpedoes needed to sink: 0.3 (Approximates number of 'typical' torpedo hits needed to sink ship)

Relative steadiness as gun platform, 62 percent (50 percent is 'average')

Relative rocking effect from firing to beam, 0.27

Relative quality as a seaboat: 1.04

+++++++++++++++++++++++++

Hull form characteristics:

Block coefficient: 0.40
Sharpness coefficient: 0.30
Hull speed coefficient 'M' = 8.94
'Natural speed' for length = 19.8 knots
Power going to wave formation at top speed: 64 percent

Estimated hull characteristics and strength:

Relative underwater volume absorbed by magazines and engineering spaces: 181 percent
Relative accommodation and working space: 93 percent

Displacement factor: 70 percent
(Displacement relative to loading factors)

Relative cross-sectional hull strength: 0.56
(Structure weight per square metre of hull surface: 223 kg)

Relative longitudinal hull strength: 1.31
(for 4.80 m average freeboard;freeboard adjustment +1.32 m)

Relative composite hull strength: 0.61

+++++++++++++++++++++++++

[Machine-readable parameters: Spring Style v. 1.2.1]
393.60 x 39.36 x 13.78; 15.74 -- Dimensions
0.40 -- Block coefficient
1932 -- Year laid down
33.44 / 7500 / 12.00; Oil-fired turbine or equivalent -- Speed / radius / cruise
90 tons -- Miscellaneous weights
++++++++++
6 x 5.51; 0 -- Main battery; turrets
Central positioning of guns
Gun-shields:
8 x 1.38; 0 -- Secondary battery; turrets
Gun-shields:
4 x 0.59 -- Tertiary (QF/AA) battery
Gun-shields:
0 -- No fourth (light) battery
8 / 0 / 20.98 -- TT / submerged / size
++++++++++
0.00 -- No belt armor
0.00 / 1.18 -- Deck / CT
1.18 / 0.79 / 0.79 / 0.00 -- Battery armor

(Note: For portability, values are stored in Anglo-American units)

+++++++++++++++++++++++++++++++++++++++++++++++++++++++

Breakdown of Miscellaneous Weight:
- 25 tons for aircraft
- 25 tons for catapult
- 10 tons for sonar
- 15 tons for DC rail and two DC mortars
- 15 tons for 60 DCs (each 250 kg)





Ships in class:
HICMS Yingtan, laid down 1933
HICMS Dalian, laid down 1933

Yiyang - Class
Destroyer Leader

Displacement:
2.000 t light; 2.178 t standard; 2.365 t normal; 2.514 t full load

Dimensions:
Length overall / water x beam x draught
374,27 ft / 364,99 ft x 37,57 ft x 15,09 ft (normal load)
114,08 m / 111,25 m x 11,45 m x 4,60 m

Armament:
8 - 5,00" / 127 mm guns (4x2 guns), 62,50lbs / 28,35kg shells, 1938 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
4 - 1,57" / 40,0 mm guns (2x2 guns), 1,95lbs / 0,88kg shells, 1938 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
10 - 0,98" / 25,0 mm guns (5x2 guns), 0,48lbs / 0,22kg shells, 1938 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 513 lbs / 232 kg
Shells per gun, main battery: 450
6 - 21,0" / 533 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1,97" / 50 mm 0,98" / 25 mm -
2nd: 0,79" / 20 mm 0,39" / 10 mm -
3rd: 0,39" / 10 mm - -

- Conning tower: 0,98" / 25 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 44.060 shp / 32.869 Kw = 34,00 kts
Range 3.850nm at 15,00 kts
Bunker at max displacement = 336 tons

Complement:
169 - 220

Cost:
£1,535 million / $6,141 million

Distribution of weights at normal displacement:
Armament: 64 tons, 2,7%
Armour: 41 tons, 1,8%
- Belts: 0 tons, 0,0%
- Torpedo bulkhead: 0 tons, 0,0%
- Armament: 38 tons, 1,6%
- Armour Deck: 0 tons, 0,0%
- Conning Tower: 4 tons, 0,2%
Machinery: 1.061 tons, 44,9%
Hull, fittings & equipment: 784 tons, 33,1%
Fuel, ammunition & stores: 365 tons, 15,4%
Miscellaneous weights: 50 tons, 2,1%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
688 lbs / 312 Kg = 11,0 x 5,0 " / 127 mm shells or 0,3 torpedoes
Stability (Unstable if below 1.00): 1,08
Metacentric height 1,3 ft / 0,4 m
Roll period: 13,6 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0,94
Seaboat quality (Average = 1.00): 1,08

Hull form characteristics:
Hull has raised forecastle, rise forward of midbreak
and transom stern
Block coefficient: 0,400
Length to Beam Ratio: 9,72 : 1
'Natural speed' for length: 22,15 kts
Power going to wave formation at top speed: 67 %
Trim (Max stability = 0, Max steadiness = 100): 65
Bow angle (Positive = bow angles forward): 22,00 degrees
Stern overhang: 0,00 ft / 0,00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22,97 ft / 7,00 m
- Forecastle (20%): 22,31 ft / 6,80 m (21,33 ft / 6,50 m aft of break)
- Mid (50%): 20,67 ft / 6,30 m (13,12 ft / 4,00 m aft of break)
- Quarterdeck (20%): 13,12 ft / 4,00 m
- Stern: 13,12 ft / 4,00 m
- Average freeboard: 17,38 ft / 5,30 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 171,9%
- Above water (accommodation/working, high = better): 117,7%
Waterplane Area: 8.759 Square feet or 814 Square metres
Displacement factor (Displacement / loading): 78%
Structure weight / hull surface area: 43 lbs/sq ft or 208 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,50
- Longitudinal: 2,74
- Overall: 0,59
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform

Breakdown of Miscellaneous Weight:
- 15 tons for radar
- 15 tons for sonar
- 8 tons for two DC mortars
- 12 tons for 100 DCs (each 150 kg)





Ships in class:
HICMS Jingxing, laid down 1941
HICMS Gaoyi, laid down 1941
HICMS Pingshan, laid down 1941
HICMS Gaocheng, laid down 1941

Zhengzhou - Class (ex Greek Leon - Class)
Destroyer Leader

Displacement:
2,962 t light; 3,061 t standard; 3,143 t normal; 3,197 t full load
Loading submergence 322 tons/feet

Dimensions:
420.00 ft x 42.10 ft x 12.20 ft (normal load)
128.02 m x 12.83 m x 3.72 m

Armament:
6 - 5.00" / 127 mm guns (3 Main turrets x 2 guns, 1 superfiring turret)
3 - 3.00" / 76 mm guns
8 - 1.57" / 40 mm AA guns
Weight of broadside 431 lbs / 196 kg
9 - 21.0" / 533.4 mm above water torpedoes

Armour:
Belt 1.00" / 25 mm, ends unarmoured
Belts cover 191 % of normal area
Main turrets 1.00" / 25 mm
Conning tower 1.00" / 25 mm
Machinery: Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 60,660 shp / 45,253 Kw = 33.70 kts
Range 2,000nm at 12.00 kts

Complement:
209 - 272

Cost:
£1.272 million / $5.086 million

Distribution of weights at normal Displacement:
Armament: 54 tons, 1.7 % Armour: 219 tons, 7.0 %
Belts: 166 tons, 5.3 %, Armament: 47 tons, 1.5 %, Armour Deck: 0 tons, 0.0 %
Conning Tower: 5 tons, 0.1 %, Torpedo bulkhead: 0 tons, 0.0 % Machinery: 1,711 tons, 54.4 %
Hull, fittings & equipment: 978 tons, 31.1 %
Fuel, ammunition & stores: 182 tons, 5.8 %
Miscellaneous weights: 0 tons, 0.0 %

Metacentric height 1.9

Remarks:
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage & compartmentation is cramped
Room for accommodation & workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.19
Shellfire needed to sink: 883 lbs / 400 Kg = 14.1 x 5.0 " / 127 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 0.4
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 72 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.45
Relative quality as seaboat: 1.03

Hull form characteristics:
Block coefficient: 0.510
Sharpness coefficient: 0.33
Hull speed coefficient 'M': 8.76
'Natural speed' for length: 20.49 kts
Power going to wave formation at top speed: 67 %
Trim: 70
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 188.8 %
Relative accommodation and working space: 121.3 %
(Average = 100%)
Displacement factor: 69 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.60
(Structure weight / hull surface area: 49 lbs / square foot or 242 Kg / square metre)
Relative longitudinal hull strength: 1.21
(for 18.20 ft / 5.55 m average freeboard, freeboard adjustment 6.19 ft)
Relative composite hull strength: 0.64





Ships in Class:
HICMS Zhengzou; laid down 1925
HICMS Haikou; laid down 1925
HICMS Lanzhou; laid down 1926
HICMS Changchun; laid down 1926