WesWorld

Vouruskasha Class Destroyer


Picture by ALVAMA

Based on the Japanese Mutsuki.

Vouruskasha, D-1, laid down 1935
Hormoz, D-2, laid down 1935
Khalij-e Fars, D-3, laid down 1935
Dariae Mazenderan, D-4, laid down 1935

Laid down 1935

Displacement:
1,480 t light; 1,561 t standard; 1,725 t normal; 1,857 t full load

Dimensions: Length overall / water x beam x draught
370.00 ft / 370.00 ft x 34.00 ft x 12.00 ft (normal load)
112.78 m / 112.78 m x 10.36 m x 3.66 m

Armament:
4 - 5.12" / 130 mm guns in single mounts, 67.03lbs / 30.41kg shells, 1935 Model
Dual purpose guns in deck mounts with hoists
on centreline, evenly spread, 2 raised mounts
Aft Main mounts separated by engine room
10 - 0.98" / 25.0 mm guns (5x2 guns), 0.48lbs / 0.22kg shells, 1935 Model
Anti-aircraft guns in deck mounts
on side, all amidships
5 - 0.52" / 13.2 mm guns in single mounts, 0.07lbs / 0.03kg shells, 1935 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 273 lbs / 124 kg
Shells per gun, main battery: 300
6 - 24.0" / 609.6 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm - -

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 36,743 shp / 27,410 Kw = 34.25 kts
Range 4,000nm at 15.00 kts
Bunker at max displacement = 296 tons

Complement:
133 - 174

Cost:
£1.005 million / $4.022 million

Distribution of weights at normal displacement:
Armament: 34 tons, 2.0%
Armour: 12 tons, 0.7%
- Belts: 0 tons, 0.0%
- Torpedo bulkhead: 0 tons, 0.0%
- Armament: 12 tons, 0.7%
- Armour Deck: 0 tons, 0.0%
- Conning Tower: 0 tons, 0.0%
Machinery: 836 tons, 48.4%
Hull, fittings & equipment: 548 tons, 31.8%
Fuel, ammunition & stores: 245 tons, 14.2%
Miscellaneous weights: 50 tons, 2.9%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
485 lbs / 220 Kg = 7.2 x 5.1 " / 130 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.15
Metacentric height 1.3 ft / 0.4 m
Roll period: 12.6 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.59
Seaboat quality (Average = 1.00): 1.00

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.400
Length to Beam Ratio: 10.88 : 1
'Natural speed' for length: 22.10 kts
Power going to wave formation at top speed: 66 %
Trim (Max stability = 0, Max steadiness = 100): 70
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: 22.00 ft / 6.71 m
- Forecastle (20%): 14.00 ft / 4.27 m
- Mid (50%): 14.00 ft / 4.27 m
- Quarterdeck (15%): 14.00 ft / 4.27 m
- Stern: 14.00 ft / 4.27 m
- Average freeboard: 14.64 ft / 4.46 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 176.2%
- Above water (accommodation/working, high = better): 92.0%
Waterplane Area: 8,036 Square feet or 747 Square metres
Displacement factor (Displacement / loading): 71%
Structure weight / hull surface area: 35 lbs/sq ft or 173 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.70
- Overall: 0.57
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
(as Simmed by Rooijen10 )

Burijas Class Destroyer



D-5 Burijas, laid down 1936
D-6 Asto Vidatu, laid down 1936
D-7 Dev, laid down 1939

Displacement:
2,203 t light; 2,317 t standard; 2,812 t normal; 3,208 t full load

Dimensions: Length overall / water x beam x draught
390.00 ft / 390.00 ft x 37.00 ft x 15.50 ft (normal load)
118.87 m / 118.87 m x 11.28 m x 4.72 m

Armament:
10 - 5.12" / 130 mm guns (5x2 guns), 67.03lbs / 30.40kg shells, 1936 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, majority aft, 2 raised mounts - superfiring
4 - 0.98" / 25.0 mm guns (1x4 guns), 0.48lbs / 0.22kg shells, 1936 Model
Anti-aircraft guns in deck mount
on centreline amidships, all raised guns - superfiring
16 - 0.98" / 25.0 mm guns (4x4 guns), 0.48lbs / 0.22kg shells, 1936 Model
Anti-aircraft guns in deck mounts
on side, all amidships
Weight of broadside 680 lbs / 308 kg
Shells per gun, main battery: 150
8 - 24.0" / 609.6 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm - -

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 48,793 shp / 36,399 Kw = 34.00 kts
Range 9,500nm at 15.00 kts
Bunker at max displacement = 891 tons

Complement:
192 - 250

Cost:
£1.804 million / $7.215 million

Distribution of weights at normal displacement:
Armament: 85 tons, 3.0 %
Armour: 25 tons, 0.9 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 25 tons, 0.9 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 1,225 tons, 43.6 %
Hull, fittings & equipment: 818 tons, 29.1 %
Fuel, ammunition & stores: 609 tons, 21.7 %
Miscellaneous weights: 50 tons, 1.8 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
851 lbs / 386 Kg = 12.7 x 5.1 " / 130 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.27
Metacentric height 1.7 ft / 0.5 m
Roll period: 11.8 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.84
Seaboat quality (Average = 1.00): 1.00

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.440
Length to Beam Ratio: 10.54 : 1
'Natural speed' for length: 22.61 kts
Power going to wave formation at top speed: 66 %
Trim (Max stability = 0, Max steadiness = 100): 51
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: 23.00 ft / 7.01 m
- Forecastle (17 %): 18.00 ft / 5.49 m
- Mid (50 %): 18.00 ft / 5.49 m (14.00 ft / 4.27 m aft of break)
- Quarterdeck (15 %): 14.00 ft / 4.27 m
- Stern: 14.00 ft / 4.27 m
- Average freeboard: 16.34 ft / 4.98 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 165.8 %
- Above water (accommodation/working, high = better): 75.1 %
Waterplane Area: 9,483 Square feet or 881 Square metres
Displacement factor (Displacement / loading): 82 %
Structure weight / hull surface area: 43 lbs/sq ft or 208 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.51
- Longitudinal: 1.94
- Overall: 0.58
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped



(Picture and Sim by desertfox)

Agas class Destroyer

Persia was to have purchased seven Bharati G-135 destroyers in 1941 and given them a life extension refit in 1942.

Acquisition was subsequently curtailed at two units, and neither received a refit, as their in-service life was expected to be brief.

DD Agas, ex-Amritsar, laid down 1923, to Mexico 1944
DD Ahriman, ex-Gwalior, laid down 1923, to Mexico 1944

G-135, laid down 1923

Length, 106.7 m x Beam, 10.1 m x Depth, 3.2 m
1386 tonnes normal displacement (1268 tonnes standard)

Main battery: 4 x 10.5-cm
Secondary battery: 4 x 3.5-cm
AA battery: 2 x 1.5-cm

Weight of broadside: 67 kg

8 TT, 50.0 cm

Hull unarmored
Conning tower, 5.0 cm

Battery armor:
Main, 5.0 cm shields / secondary, 2.0 cm shields
AA, 2.0 cm shields

Maximum speed for 26009 shaft kw = 33.27 knots
Approximate cruising radius, 4500 nm / 12 knots

Typical complement: 114-148


Estimated cost, $1.907 million (£477,000)

Remarks:

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

Ship has slow, easy roll; a good, steady gun platform.

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

Cramped ship; poor crew accommodation, limited working space.


Distribution of weights:
Percent
normal
displacement:

Armament ......................... 18 tonnes = 1 pct
Armor, total ..................... 17 tonnes = 1 pct

C.T. 5 tonnes = 0 pct
Armament 11 tonnes = 1 pct

Machinery ........................ 753 tonnes = 54 pct
Hull and fittings; equipment ..... 400 tonnes = 29 pct
Fuel, ammunition, stores ......... 158 tonnes = 11 pct
Miscellaneous weights ............ 40 tonnes = 3 pct
-----
1386 tonnes = 100 pct

Estimated metacentric height, 0.4 m

Displacement summary:

Light ship: 1228 tonnes
Standard displacement: 1268 tonnes
Normal service: 1386 tonnes
Full load: 1475 tonnes

Loading submergence 586 tonnes/metre

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


Estimated overall survivability and seakeeping ability:

Relative margin of stability: 1.26

Shellfire needed to sink: 155 kg = 9.7 x 10.5-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, 72 percent
(50 percent is 'average')

Relative rocking effect from firing to beam, 0.16

Relative quality as a seaboat: 1.09

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


Hull form characteristics:

Block coefficient: 0.40
Sharpness coefficient: 0.29
Hull speed coefficient 'M' = 9.59
'Natural speed' for length = 18.7 knots
Power going to wave formation
at top speed: 66 percent


Estimated hull characteristics and strength:

Relative underwater volume absorbed by
magazines and engineering spaces: 189 percent

Relative accommodation and working space: 88 percent


Displacement factor: 55 percent
(Displacement relative to loading factors)


Relative cross-sectional hull strength: 0.50
(Structure weight per square
metre of hull surface: 161 kg)

Relative longitudinal hull strength: 1.17
(for 4.40 m average freeboard;
freeboard adjustment +1.29 m)

Relative composite hull strength: 0.55

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


[Machine-readable parameters: Spring Style v. 1.2.1]

350.00 x 33.00 x 10.50; 14.43 -- Dimensions
0.40 -- Block coefficient
1923 -- Year laid down
33.27 / 4500 / 12.00; Oil-fired turbine or equivalent -- Speed / radius / cruise
40 tons -- Miscellaneous weights
++++++++++
4 x 4.13; 0 -- Main battery; turrets
Central positioning of guns
Gun-shields
:
4 x 1.38; 0 -- Secondary battery; turrets
Gun-shields
:
2 x 0.59 -- Tertiary (QF/AA) battery
Gun-shields
:
0 -- No fourth (light) battery
8 / 0 / 19.69 -- TT / submerged / size
++++++++++
0.00 -- No belt armor
0.00 / 1.97 -- Deck / CT
1.97 / 0.79 / 0.79 / 0.00 -- Battery armor


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

Ayask Class Destroyer

Ayask, laid down 1942
Baneh, laid down 1943
Chabahar, laid down 1944
Dorud, laid down 1944
Eslamshahr, laid down 1945

Enter ship name, Enter country Enter ship type laid down 1942

Displacement:
1,782 t light; 1,885 t standard; 2,144 t normal; 2,352 t full load

Dimensions: Length overall / water x beam x draught
385.32 ft / 377.30 ft x 36.09 ft x 13.12 ft (normal load)
117.45 m / 115.00 m x 11.00 m x 4.00 m

Armament:
6 - 5.12" / 130 mm guns (3x2 guns), 67.03lbs / 30.41kg shells, 1942 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, majority forward, 1 raised mount - superfiring
8 - 1.57" / 40.0 mm guns (4x2 guns), 1.95lbs / 0.89kg shells, 1942 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
8 - 0.79" / 20.0 mm guns (4x2 guns), 0.24lbs / 0.11kg shells, 1942 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 420 lbs / 190 kg
Shells per gun, main battery: 250
8 - 24.0" / 610 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.39" / 10 mm 0.98" / 25 mm
2nd: 0.39" / 10 mm - -
3rd: 0.39" / 10 mm - -

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 44,000 shp / 32,824 Kw = 34.55 kts
Range 6,000nm at 15.00 kts (Bunkerage = 467 tons)

Complement:
156 - 204

Cost:
£1.544 million / $6.176 million

Distribution of weights at normal displacement:
Armament: 52 tons, 2.4 %
Armour: 14 tons, 0.7 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 14 tons, 0.7 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 973 tons, 45.4 %
Hull, fittings & equipment: 603 tons, 28.1 %
Fuel, ammunition & stores: 362 tons, 16.9 %
Miscellaneous weights: 140 tons, 6.5 %
-10 t: Radar
-10 t: Sonar
-20 t: 60 DC plus throwers and rails
-30 t: Rails and 60 mines
-70 t: Weight reserve

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
555 lbs / 252 Kg = 8.3 x 5.1 " / 130 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.18
Metacentric height 1.5 ft / 0.4 m
Roll period: 12.5 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.55
Seaboat quality (Average = 1.00): 0.80

Hull form characteristics:
Hull has raised forecastle
and transom stern
Block coefficient: 0.420
Length to Beam Ratio: 10.45 : 1
'Natural speed' for length: 22.32 kts
Power going to wave formation at top speed: 67 %
Trim (Max stability = 0, Max steadiness = 100): 62
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 17.72 ft / 5.40 m
- Forecastle (20 %): 15.75 ft / 4.80 m (13.78 ft / 4.20 m aft of break)
- Mid (50 %): 13.78 ft / 4.20 m
- Quarterdeck (15 %): 13.78 ft / 4.20 m
- Stern: 13.78 ft / 4.20 m
- Average freeboard: 14.33 ft / 4.37 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 173.5 %
- Above water (accommodation/working, high = better): 69.8 %
Waterplane Area: 8,813 Square feet or 819 Square metres
Displacement factor (Displacement / loading): 75 %
Structure weight / hull surface area: 38 lbs/sq ft or 184 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.36
- Overall: 0.55
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather