WesWorld

Kaivan (0)

Khordad (0)

Arak (2)

Kaivan II (3)

Damavand (4)

Kaivan class patrol boats

((Ex Chien Kang, China Destroyer laid down 1912 (refit 1936))

Kaivan, deleted 1944
Keyon, deleted 1944

Displacement:
348 t light; 359 t standard; 411 t normal; 452 t full load

Dimensions: Length overall / water x beam x draught
198,00 ft / 198,00 ft x 22,00 ft x 6,00 ft (normal load)
60,35 m / 60,35 m x 6,71 m x 1,83 m

Armament:
2 - 2,99" / 76,0 mm guns in single mounts, 13,39lbs / 6,08kg shells, 1912 Model
Breech loading guns in deck mounts
on centreline ends, evenly spread
4 - 0,98" / 25,0 mm guns (2x2 guns), 0,48lbs / 0,22kg shells, 1912 Model
Anti-aircraft guns in deck mounts
on side, all amidships
Weight of broadside 29 lbs / 13 kg
Shells per gun, main battery: 150

Machinery:
Coal fired boilers, complex reciprocating steam engines,
Geared drive, 2 shafts, 8.892 ihp / 6.633 Kw = 26,00 kts
Range 3.000nm at 10,00 kts
Bunker at max displacement = 94 tons (100% coal)
Caution: Delicate, lightweight machinery

Complement:
45 - 59

Cost:
£0,047 million / $0,188 million

Distribution of weights at normal displacement:
Armament: 4 tons, 0,9%
Machinery: 228 tons, 55,5%
Hull, fittings & equipment: 116 tons, 28,3%
Fuel, ammunition & stores: 63 tons, 15,3%
Miscellaneous weights: 0 tons, 0,0%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
137 lbs / 62 Kg = 10,2 x 3,0 " / 76 mm shells or 0,2 torpedoes
Stability (Unstable if below 1.00): 1,59
Metacentric height 1,1 ft / 0,3 m
Roll period: 8,7 seconds
Steadiness - As gun platform (Average = 50 %): 41 %
- Recoil effect (Restricted arc if above 1.00): 0,07
Seaboat quality (Average = 1.00): 0,67

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0,550
Length to Beam Ratio: 9,00 : 1
'Natural speed' for length: 14,07 kts
Power going to wave formation at top speed: 73 %
Trim (Max stability = 0, Max steadiness = 100): 50
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: 15,48 ft / 4,72 m
- Forecastle (20%): 9,85 ft / 3,00 m
- Mid (50%): 9,85 ft / 3,00 m
- Quarterdeck (15%): 9,85 ft / 3,00 m
- Stern: 9,85 ft / 3,00 m
- Average freeboard: 10,30 ft / 3,14 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 186,0%
- Above water (accommodation/working, high = better): 126,7%
Waterplane Area: 3.040 Square feet or 282 Square metres
Displacement factor (Displacement / loading): 34%
Structure weight / hull surface area: 20 lbs/sq ft or 96 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,51
- Longitudinal: 2,57
- Overall: 0,60
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Caution: Lacks seaworthiness - very limited seakeeping ability

Khordad Class

(Ex Chien Kang Class, China Destroyer laid down 1912)

Khordad, deleted 1944
Spenta Armaiti, deleted 1944

Displacement:
347 t light; 358 t standard; 411 t normal; 451 t full load
Loading submergence 83 tons/feet

Dimensions:
198.00 ft x 22.00 ft x 6.00 ft (normal load)
60.35 m x 6.71 m x 1.83 m

Armament:
2 - 3.00" / 76 mm guns
2 - 1.85" / 47 mm guns
Weight of broadside 33 lbs / 15 kg
2 - 18.0" / 457.2 mm above water torpedoes

Machinery:
Coal fired boilers, complex reciprocating steam engines,
Geared drive, 2 shafts, 8,902 ihp / 6,641 Kw = 26.00 kts
Range 3,000nm at 10.00 kts
Caution: Delicate, lightweight machinery

Complement:
45 - 59

Cost:
£30.047 million / $0.190 million

Distribution of weights at normal displacement:
Armament: 4 tons, 1.0 %
Machinery: 227 tons, 55.4 %
Hull, fittings & equipment: 116 tons, 28.1 %
Fuel, ammunition & stores: 64 tons, 15.5 %
Miscellaneous weights: 0 tons, 0.0 %

Metacentric height 1.0

Remarks:
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage & compartmentation is cramped
Room for accommodation & workspaces is adequate

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.44
Shellfire needed to sink: 138 lbs / 63 Kg = 10.3 x 3.0 " / 76 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 0.2
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 54 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.12
Relative quality as seaboat: 1.07

Hull form characteristics:
Block coefficient: 0.550
Sharpness coefficient: 0.36
Hull speed coefficient 'M': 8.14
'Natural speed' for length: 14.07 kts
Power going to wave formation at top speed: 73 %
Trim: 50
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 186.5 %
Relative accommodation and working space: 113.8 %
(Average = 100%)
Displacement factor: 34 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.50
(Structure weight / hull surface area: 21 lbs / square foot or 105 Kg / square metre)
Relative longitudinal hull strength: 1.90
(for 12.00 ft / 3.66 m average freeboard, freeboard adjustment 4.00 ft)
Relative composite hull strength: 0.57

Arak Class Gunship

For service in the Caspian. Broadly similar in appearance to India's Kudligi class, but with a less extensive ASW fit.

Arak, laid down 1933
Zabol, laid down 1933

Length, 90.0 m x Beam, 10.0 m x Depth, 3.6 m
1372 tonnes normal displacement (1255 tonnes standard)

Main battery: 4 x 13.0-cm
Secondary battery: 8 x 5.0-cm
AA battery: 4 x 2.5-cm

Weight of broadside: 137 kg

4 TT, 60.0 cm

Main belt, 5.0 cm; ends unarmored
Armor deck, average 2.0 cm
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 8001 shaft kw = 24.38 knots
Approximate cruising radius, 5000 nm / 12 knots

Typical complement: 113-147


Estimated cost, $2.220 million (£555,000)

Remarks:

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

Excellent seaboat; comfortable and able to fight her guns
in the heaviest weather.

Cramped ship; poor crew accommodation, limited working space.


Distribution of weights:
Percent
normal
displacement:

Armament ......................... 38 tonnes = 3 pct
Armor, total ..................... 208 tonnes = 15 pct

Belt 108 tonnes = 8 pct
Deck 79 tonnes = 6 pct
C.T. 5 tonnes = 0 pct
Armament 17 tonnes = 1 pct

Machinery ........................ 312 tonnes = 23 pct
Hull and fittings; equipment ..... 609 tonnes = 44 pct
Fuel, ammunition, stores ......... 169 tonnes = 12 pct
Miscellaneous weights ............ 35 tonnes = 3 pct
-----
1372 tonnes = 100 pct

Estimated metacentric height, 0.4 m

Displacement summary:

Light ship: 1203 tonnes
Standard displacement: 1255 tonnes
Normal service: 1372 tonnes
Full load: 1460 tonnes

Loading submergence 507 tonnes/metre

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


Estimated overall survivability and seakeeping ability:

Relative margin of stability: 1.12

Shellfire needed to sink: 872 kg = 28.6 x 13.0-cm shells
(Approximates weight of penetrating
shell hits needed to sink ship,
not counting critical hits)

Torpedoes needed to sink: 0.7
(Approximates number of 'typical'
torpedo hits needed to sink ship)

Relative steadiness as gun platform, 73 percent
(50 percent is 'average')

Relative rocking effect from firing to beam, 0.36

Relative quality as a seaboat: 1.65

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


Hull form characteristics:

Block coefficient: 0.42
Sharpness coefficient: 0.31
Hull speed coefficient 'M' = 8.12
'Natural speed' for length = 17.2 knots
Power going to wave formation
at top speed: 57 percent


Estimated hull characteristics and strength:

Relative underwater volume absorbed by
magazines and engineering spaces: 98 percent

Relative accommodation and working space: 83 percent


Displacement factor: 117 percent
(Displacement relative to loading factors)


Relative cross-sectional hull strength: 0.90
(Structure weight per square
metre of hull surface: 282 kg)

Relative longitudinal hull strength: 2.74
(for 4.30 m average freeboard;
freeboard adjustment +1.20 m)

Relative composite hull strength: 1.01

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


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

295.20 x 32.80 x 11.81; 14.10 -- Dimensions
0.42 -- Block coefficient
1933 -- Year laid down
24.38 / 5000 / 12.00; Oil-fired turbine or equivalent -- Speed / radius / cruise
35 tons -- Miscellaneous weights
++++++++++
4 x 5.12; 0 -- Main battery; turrets
Central positioning of guns
Gun-shields
:
8 x 1.97; 0 -- Secondary battery; turrets
Gun-shields
:
4 x 0.98 -- Tertiary (QF/AA) battery
Gun-shields
:
0 -- No fourth (light) battery
4 / 0 / 23.62 -- TT / submerged / size
++++++++++
1.97 / 0.00 / 0.00 / 0.00; 100 -- Belt armor; relative extent
0.79 / 1.97 -- Deck / CT
1.97 / 0.79 / 0.79 / 0.00 -- Battery armor


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


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

Bharat sold three escort ships to Persia to help the Persian fleet recover form the losses suffered during the Persian Civil War. The ships received life extension refits in 1940

Kaivan, purchased 1939
Keyon, purchased 1939
Khordad, purchased 1939

Kaivan Class, Persian Destroyer Escort laid down 1921, refit 1940

Displacement:
872 t light; 914 t standard; 1,048 t normal; 1,156 t full load

Dimensions: Length overall / water x beam x draught
261.49 ft / 250.00 ft x 33.14 ft x 8.86 ft (normal load)
79.70 m / 76.20 m x 10.10 m x 2.70 m

Armament:
4 - 4.13" / 105 mm guns (2x2 guns), 35.32lbs / 16.02kg shells, 1940 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread
4 - 1.57" / 40.0 mm guns (1x4 guns), 1.95lbs / 0.88kg shells, 1940 Model
Anti-aircraft guns in deck mount
on centreline forward, all raised guns - superfiring
8 - 0.79" / 20.0 mm guns (4x2 guns), 0.24lbs / 0.11kg shells, 1940 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 151 lbs / 68 kg
Shells per gun, main battery: 240

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1.97" / 50 mm 162.50 ft / 49.53 m 6.92 ft / 2.11 m
Ends: Unarmoured
Main Belt covers 100 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm 0.79" / 20 mm 0.79" / 20 mm
2nd: 0.79" / 20 mm - -
3rd: 0.79" / 20 mm - -

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 6,657 shp / 4,966 Kw = 21.81 kts
Range 6,000nm at 12.00 kts
Bunker at max displacement = 241 tons

Complement:
91 - 119

Cost:
£0.200 million / $0.799 million

Distribution of weights at normal displacement:
Armament: 19 tons, 1.8 %
Armour: 109 tons, 10.4 %
- Belts: 95 tons, 9.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 14 tons, 1.3 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 229 tons, 21.9 %
Hull, fittings & equipment: 465 tons, 44.4 %
Fuel, ammunition & stores: 176 tons, 16.8 %
Miscellaneous weights: 50 tons, 4.8 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,906 lbs / 865 Kg = 54.0 x 4.1 " / 105 mm shells or 0.7 torpedoes
Stability (Unstable if below 1.00): 1.29
Metacentric height 1.5 ft / 0.5 m
Roll period: 11.3 seconds
Steadiness - As gun platform (Average = 50 %): 49 %
- Recoil effect (Restricted arc if above 1.00): 0.25
Seaboat quality (Average = 1.00): 1.36

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.500
Length to Beam Ratio: 7.54 : 1
'Natural speed' for length: 15.81 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 36
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 1.64 ft / 0.50 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 17.06 ft / 5.20 m
- Forecastle (20 %): 16.40 ft / 5.00 m
- Mid (50 %): 16.40 ft / 5.00 m (9.84 ft / 3.00 m aft of break)
- Quarterdeck (15 %): 9.84 ft / 3.00 m
- Stern: 9.84 ft / 3.00 m
- Average freeboard: 13.18 ft / 4.02 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 91.4 %
- Above water (accommodation/working, high = better): 148.7 %
Waterplane Area: 5,520 Square feet or 513 Square metres
Displacement factor (Displacement / loading): 136 %
Structure weight / hull surface area: 49 lbs/sq ft or 239 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.87
- Longitudinal: 3.46
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Good seaboat, rides out heavy weather easily

[size=3]Damavand Class Sloop[/size]

Oceangoing escorts to protect Persian petroleum exports.

Damavand, laid down 1941
Alam Kuh, laid down 1942
Gorg, laid down 1943
Naz, laid down 1944
Varavast, laid down 1945

Enter ship name, Enter country Enter ship type laid down 1941

Displacement:
1,200 t light; 1,286 t standard; 1,472 t normal; 1,622 t full load

Dimensions: Length overall / water x beam x draught
330.97 ft / 320.05 ft x 36.09 ft x 11.15 ft (normal load)
100.88 m / 97.55 m x 11.00 m x 3.40 m

Armament:
4 - 5.12" / 130 mm guns (2x2 guns), 67.03lbs / 30.41kg shells, 1941 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, 1 raised mount
8 - 1.38" / 35.0 mm guns (4x2 guns), 1.31lbs / 0.59kg shells, 1941 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
8 - 0.59" / 15.0 mm guns (2x4 guns), 0.10lbs / 0.05kg shells, 1941 Model
Breech loading guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 279 lbs / 127 kg
Shells per gun, main battery: 350

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm 0.79" / 20 mm 1.97" / 50 mm
2nd: 0.79" / 20 mm 0.39" / 10 mm -
3rd: 0.39" / 10 mm - -

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 12,001 shp / 8,953 Kw = 25.02 kts
Range 5,000nm at 15.00 kts (Bunkerage = 336 tons)

Complement:
118 - 154

Cost:
£0.716 million / $2.862 million

Distribution of weights at normal displacement:
Armament: 35 tons, 2.4 %
Armour: 21 tons, 1.4 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 21 tons, 1.4 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 317 tons, 21.5 %
Hull, fittings & equipment: 714 tons, 48.5 %
Fuel, ammunition & stores: 272 tons, 18.5 %
Miscellaneous weights: 113 tons, 7.7 %
-10 t: Radar
-10 t: Sonar
-20 t: DCT + Rails + 60 depth charges
-25 t: Command facilities
-48 t: Weight reserve

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
2,184 lbs / 991 Kg = 32.6 x 5.1 " / 130 mm shells or 0.7 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 1.3 ft / 0.4 m
Roll period: 12.1 seconds
Steadiness - As gun platform (Average = 50 %): 61 %
- Recoil effect (Restricted arc if above 1.00): 0.61
Seaboat quality (Average = 1.00): 1.32

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.440
Length to Beam Ratio: 9.76 : 1
'Natural speed' for length: 17.89 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 46
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21.00 ft / 6.40 m
- Forecastle (20 %): 17.06 ft / 5.20 m
- Mid (50 %): 17.06 ft / 5.20 m (9.19 ft / 2.80 m aft of break)
- Quarterdeck (15 %): 9.19 ft / 2.80 m
- Stern: 9.19 ft / 2.80 m
- Average freeboard: 13.44 ft / 4.10 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 99.2 %
- Above water (accommodation/working, high = better): 151.3 %
Waterplane Area: 7,309 Square feet or 679 Square metres
Displacement factor (Displacement / loading): 141 %
Structure weight / hull surface area: 58 lbs/sq ft or 283 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.90
- Longitudinal: 2.53
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Good seaboat, rides out heavy weather easily

Paloon Gardan Class Coastal Sloop

These are identical to the Bharati coastal sloops being built at the same time period, but are being mass-produced in Persia. A run of eight is projected.

Paloon Gardan, laid down 1946
Koloon Bastak, laid down 1946
Sarakchai, laid down 1946
Kharsang, laid down 1946
Tochal, laid down 1947
Bazarak, laid down 1947
Spilit, laid down 1947
Siah-band, laid down 1947

Sabalan Class Sloop

A new class of larger ocean-going sloops. Four units projected, which would give Persia three groups of four sloops in the region.

Sabalan, laid down 1946
Kholeno, laid down 1947
Lavarak, laid down 1947

Apparently I need to track down the SS report for this, because I don't see it posted.