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1

Saturday, April 19th 2008, 11:55pm

Persian Escort Study

E-1, Persia Escort laid down 1936

Displacement:
2 512 t light; 2 619 t standard; 2 841 t normal; 3 018 t full load

Dimensions: Length overall / water x beam x draught
412,17 ft / 410,11 ft x 36,09 ft x 14,76 ft (normal load)
125,63 m / 125,00 m x 11,00 m x 4,50 m

Armament:
6 - 5,12" / 130 mm guns (3x2 guns), 67,03lbs / 30,40kg shells, 1936 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, majority forward, 1 raised mount - superfiring
20 - 0,98" / 25,0 mm guns (10x2 guns), 0,48lbs / 0,22kg shells, 1936 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
2 - 2,95" / 75,0 mm guns (1x2 guns), 12,87lbs / 5,84kg shells, 1936 Model
Anti-aircraft guns in a deck mount with hoist
on centreline aft, all raised guns - superfiring
Weight of broadside 438 lbs / 198 kg
Shells per gun, main battery: 200

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1,18" / 30 mm - -
2nd: 0,79" / 20 mm - -
3rd: 0,79" / 20 mm - -

- Armour deck: 0,79" / 20 mm, Conning tower: 1,57" / 40 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 49 767 shp / 37 126 Kw = 33,00 kts
Range 7 500nm at 11,00 kts
Bunker at max displacement = 399 tons

Complement:
193 - 252

Cost:
£1,655 million / $6,621 million

Distribution of weights at normal displacement:
Armament: 55 tons, 1,9 %
Armour: 166 tons, 5,8 %
- Belts: 0 tons, 0,0 %
- Torpedo bulkhead: 0 tons, 0,0 %
- Armament: 21 tons, 0,7 %
- Armour Deck: 138 tons, 4,9 %
- Conning Tower: 7 tons, 0,2 %
Machinery: 1 286 tons, 45,3 %
Hull, fittings & equipment: 965 tons, 34,0 %
Fuel, ammunition & stores: 329 tons, 11,6 %
Miscellaneous weights: 40 tons, 1,4 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1 012 lbs / 459 Kg = 15,1 x 5,1 " / 130 mm shells or 0,4 torpedoes
Stability (Unstable if below 1.00): 1,11
Metacentric height 1,3 ft / 0,4 m
Roll period: 13,1 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0,69
Seaboat quality (Average = 1.00): 1,02

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0,455
Length to Beam Ratio: 11,36 : 1
'Natural speed' for length: 20,25 kts
Power going to wave formation at top speed: 63 %
Trim (Max stability = 0, Max steadiness = 100): 69
Bow angle (Positive = bow angles forward): 6,00 degrees
Stern overhang: 0,00 ft / 0,00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 19,69 ft / 6,00 m
- Forecastle (20 %): 14,76 ft / 4,50 m
- Mid (50 %): 14,76 ft / 4,50 m
- Quarterdeck (15 %): 14,76 ft / 4,50 m
- Stern: 14,76 ft / 4,50 m
- Average freeboard: 15,16 ft / 4,62 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 163,1 %
- Above water (accommodation/working, high = better): 138,1 %
Waterplane Area: 9 480 Square feet or 881 Square metres
Displacement factor (Displacement / loading): 83 %
Structure weight / hull surface area: 51 lbs/sq ft or 250 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,68
- Longitudinal: 1,79
- Overall: 0,75
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform


The Persian navy is studying concepts for escorts for the Maekong once it enters Persian studies, comments are as always welcome

2

Sunday, April 20th 2008, 1:43am

You can increase strength, and lower the amount of hull space used by engines, by adding a transom stern, she's plenty fast enough. I'd definitely recommend torpedoes as well, and given her strength, I'd replace the 75mm mounting with another twin 130mm.

3

Sunday, April 20th 2008, 1:50am

I was Imagining her as an AAW escort but will thest the suggestions, thanks

4

Sunday, April 20th 2008, 2:04am

E-1v2, Persia Escort laid down 1936

Displacement:
2 563 t light; 2 714 t standard; 2 934 t normal; 3 110 t full load

Dimensions: Length overall / water x beam x draught
412,52 ft / 410,11 ft x 36,09 ft x 15,42 ft (normal load)
125,74 m / 125,00 m x 11,00 m x 4,70 m

Armament:
8 - 5,12" / 130 mm guns (4x2 guns), 67,03lbs / 30,40kg shells, 1936 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
Main guns limited to end-on fire
20 - 0,98" / 25,0 mm guns (10x2 guns), 0,48lbs / 0,22kg shells, 1936 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 546 lbs / 248 kg
Shells per gun, main battery: 300
8 - 24,0" / 609,6 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1,18" / 30 mm - -
2nd: 0,79" / 20 mm - -

- Armour deck: 0,79" / 20 mm, Conning tower: 1,57" / 40 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 43 460 shp / 32 421 Kw = 33,00 kts
Range 7 500nm at 11,00 kts
Bunker at max displacement = 396 tons

Complement:
199 - 259

Cost:
£1,640 million / $6,559 million

Distribution of weights at normal displacement:
Armament: 68 tons, 2,3 %
Armour: 176 tons, 6,0 %
- Belts: 0 tons, 0,0 %
- Torpedo bulkhead: 0 tons, 0,0 %
- Armament: 26 tons, 0,9 %
- Armour Deck: 143 tons, 4,9 %
- Conning Tower: 7 tons, 0,2 %
Machinery: 1 171 tons, 39,9 %
Hull, fittings & equipment: 1 073 tons, 36,6 %
Fuel, ammunition & stores: 371 tons, 12,7 %
Miscellaneous weights: 75 tons, 2,6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1 259 lbs / 571 Kg = 18,8 x 5,1 " / 130 mm shells or 0,4 torpedoes
Stability (Unstable if below 1.00): 1,05
Metacentric height 1,2 ft / 0,4 m
Roll period: 13,8 seconds
Steadiness - As gun platform (Average = 50 %): 74 %
- Recoil effect (Restricted arc if above 1.00): 1,06
Seaboat quality (Average = 1.00): 1,23

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0,450
Length to Beam Ratio: 11,36 : 1
'Natural speed' for length: 23,02 kts
Power going to wave formation at top speed: 63 %
Trim (Max stability = 0, Max steadiness = 100): 60
Bow angle (Positive = bow angles forward): 6,00 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 %): 16,40 ft / 5,00 m
- Mid (50 %): 16,40 ft / 5,00 m
- Quarterdeck (15 %): 16,40 ft / 5,00 m
- Stern: 16,40 ft / 5,00 m
- Average freeboard: 16,93 ft / 5,16 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 151,4 %
- Above water (accommodation/working, high = better): 79,1 %
Waterplane Area: 9 807 Square feet or 911 Square metres
Displacement factor (Displacement / loading): 91 %
Structure weight / hull surface area: 51 lbs/sq ft or 251 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,65
- Longitudinal: 2,54
- Overall: 0,75
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily


New version with heavier armament

5

Sunday, April 20th 2008, 2:15am

Given that ships with a standard displacement of under 3,000 tons only need to have an overall and cross-sectional strength of over 0.50, she's got a lot of strength left over that could be put to use.....

6

Sunday, April 20th 2008, 2:23am

Suggestions?

7

Sunday, April 20th 2008, 2:38am

Well, the obvious answers are more speed and more guns.

8

Sunday, April 20th 2008, 2:51am

E-1v3, Persia Escort laid down 1936

Displacement:
2 781 t light; 2 972 t standard; 3 201 t normal; 3 385 t full load

Dimensions: Length overall / water x beam x draught
412,92 ft / 410,11 ft x 37,73 ft (Bulges 39,37 ft) x 15,42 ft (normal load)
125,86 m / 125,00 m x 11,50 m (Bulges 12,00 m) x 4,70 m

Armament:
6 - 5,12" / 130 mm guns (2x3 guns), 67,03lbs / 30,40kg shells, 1936 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread
4 - 5,12" / 130 mm guns (2x2 guns), 67,03lbs / 30,40kg shells, 1936 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, all raised mounts
40 - 0,98" / 25,0 mm guns (10x4 guns), 0,48lbs / 0,22kg shells, 1936 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 689 lbs / 313 kg
Shells per gun, main battery: 300
8 - 24,0" / 609,6 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2,76" / 70 mm 2,36" / 60 mm -
2nd: 2,36" / 60 mm 1,97" / 50 mm -
3rd: 0,79" / 20 mm - -

- Armour deck: 1,18" / 30 mm, Conning tower: 3,15" / 80 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 51 991 shp / 38 785 Kw = 34,00 kts
Range 7 500nm at 11,00 kts
Bunker at max displacement = 413 tons

Complement:
212 - 276

Cost:
£1,887 million / $7,547 million

Distribution of weights at normal displacement:
Armament: 86 tons, 2,7 %
Armour: 315 tons, 9,9 %
- Belts: 0 tons, 0,0 %
- Torpedo bulkhead: 0 tons, 0,0 %
- Armament: 77 tons, 2,4 %
- Armour Deck: 224 tons, 7,0 %
- Conning Tower: 15 tons, 0,5 %
Machinery: 1 344 tons, 42,0 %
Hull, fittings & equipment: 935 tons, 29,2 %
Fuel, ammunition & stores: 420 tons, 13,1 %
Miscellaneous weights: 100 tons, 3,1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
874 lbs / 396 Kg = 13,0 x 5,1 " / 130 mm shells or 0,4 torpedoes
Stability (Unstable if below 1.00): 1,02
Metacentric height 1,2 ft / 0,4 m
Roll period: 15,1 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 1,00
Seaboat quality (Average = 1.00): 1,02

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0,450
Length to Beam Ratio: 10,42 : 1
'Natural speed' for length: 23,18 kts
Power going to wave formation at top speed: 66 %
Trim (Max stability = 0, Max steadiness = 100): 70
Bow angle (Positive = bow angles forward): 7,00 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 %): 16,40 ft / 5,00 m
- Mid (50 %): 16,40 ft / 5,00 m
- Quarterdeck (15 %): 16,40 ft / 5,00 m
- Stern: 16,40 ft / 5,00 m
- Average freeboard: 16,93 ft / 5,16 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 162,0 %
- Above water (accommodation/working, high = better): 80,8 %
Waterplane Area: 10 252 Square feet or 952 Square metres
Displacement factor (Displacement / loading): 80 %
Structure weight / hull surface area: 45 lbs/sq ft or 218 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,50
- Longitudinal: 1,80
- Overall: 0,57
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform





More Guns!

This post has been edited 3 times, last edit by "Vukovlad" (Apr 20th 2008, 3:24am)


9

Sunday, April 20th 2008, 5:50am

I'm curious as to what these ships will be escorting at 34 knots.

10

Sunday, April 20th 2008, 3:23pm

The same things they would at 20?

11

Sunday, April 20th 2008, 4:28pm

So if they can escort things at 20 knots, and they are meant to be escorts wouldn't it be much cheaper to run them at that speed?

12

Sunday, April 20th 2008, 4:37pm

Maybe because there are also plenty of things around that can run at 30 knots.

13

Sunday, April 20th 2008, 4:40pm

That kind of speed would make it very easy to get in the van ahead of any fleet action. It would also allow these to engage DD/TBs at a farther distance from the main body, then return to screening duty very quickly.

14

Sunday, April 20th 2008, 4:48pm

I assumed that the speed would be necessary once under attack to engage MTBs/TBs or to maneuver if under air attack.

A 30kts version with better range

E-2, Persia Escort laid down 1936

Displacement:
2 412 t light; 2 604 t standard; 3 297 t normal; 3 852 t full load

Dimensions: Length overall / water x beam x draught
412,92 ft / 410,11 ft x 41,01 ft x 15,42 ft (normal load)
125,86 m / 125,00 m x 12,50 m x 4,70 m

Armament:
6 - 5,12" / 130 mm guns (2x3 guns), 67,03lbs / 30,40kg shells, 1936 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread
4 - 5,12" / 130 mm guns (2x2 guns), 67,03lbs / 30,40kg shells, 1936 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, all raised mounts
40 - 0,98" / 25,0 mm guns (10x4 guns), 0,48lbs / 0,22kg shells, 1936 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 690 lbs / 313 kg
Shells per gun, main battery: 300
10 - 24,0" / 609,6 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2,76" / 70 mm 2,36" / 60 mm -
2nd: 2,36" / 60 mm 1,97" / 50 mm -
3rd: 0,79" / 20 mm - -

- Armour deck: 1,57" / 40 mm, Conning tower: 3,15" / 80 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 31 842 shp / 23 754 Kw = 30,00 kts
Range 12 000nm at 15,00 kts
Bunker at max displacement = 1 247 tons

Complement:
216 - 282

Cost:
£1,486 million / $5,945 million

Distribution of weights at normal displacement:
Armament: 86 tons, 2,6 %
Armour: 415 tons, 12,6 %
- Belts: 0 tons, 0,0 %
- Torpedo bulkhead: 0 tons, 0,0 %
- Armament: 77 tons, 2,3 %
- Armour Deck: 323 tons, 9,8 %
- Conning Tower: 15 tons, 0,5 %
Machinery: 893 tons, 27,1 %
Hull, fittings & equipment: 917 tons, 27,8 %
Fuel, ammunition & stores: 886 tons, 26,9 %
Miscellaneous weights: 100 tons, 3,0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1 934 lbs / 877 Kg = 28,9 x 5,1 " / 130 mm shells or 0,7 torpedoes
Stability (Unstable if below 1.00): 1,06
Metacentric height 1,5 ft / 0,4 m
Roll period: 14,3 seconds
Steadiness - As gun platform (Average = 50 %): 91 %
- Recoil effect (Restricted arc if above 1.00): 1,00
Seaboat quality (Average = 1.00): 1,34

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0,445
Length to Beam Ratio: 10,00 : 1
'Natural speed' for length: 23,27 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 68
Bow angle (Positive = bow angles forward): 7,00 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 %): 16,40 ft / 5,00 m
- Mid (50 %): 16,40 ft / 5,00 m
- Quarterdeck (15 %): 16,40 ft / 5,00 m
- Stern: 16,40 ft / 5,00 m
- Average freeboard: 16,93 ft / 5,16 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 113,7 %
- Above water (accommodation/working, high = better): 74,6 %
Waterplane Area: 11 098 Square feet or 1 031 Square metres
Displacement factor (Displacement / loading): 110 %
Structure weight / hull surface area: 44 lbs/sq ft or 216 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,51
- Longitudinal: 1,64
- Overall: 0,57
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

This post has been edited 1 times, last edit by "Vukovlad" (Apr 20th 2008, 4:52pm)


15

Sunday, April 20th 2008, 4:52pm

This is what they will be escorting.
They are able to go 34 knots so they can actually screen ahead of their charge, being as it can make almost 30 itself.

Maeklong, Siamese (ex-Argentine) Battlecruiser laid down 1906 (Engine 1923) (rearmed 1934)

Displacement:
13,695 t light; 14,456 t standard; 15,208 t normal; 15,809 t full load

Dimensions: Length overall / water x beam x draught
529.00 ft / 529.00 ft x 75.00 ft x 26.00 ft (normal load)
161.24 m / 161.24 m x 22.86 m x 7.92 m

Armament:
4 - 10.00" / 254 mm guns (2x2 guns), 500.00lbs / 226.80kg shells, 1924 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
4 - 10.00" / 254 mm guns in single mounts, 500.00lbs / 226.80kg shells, 1924 Model
Breech loading guns in turrets (on barbettes)
on side ends, evenly spread
12 - 5.12" / 130 mm guns in single mounts, 66.14lbs / 30.00kg shells, 1931 Model
Breech loading guns in casemate mounts
on side, all amidships
8 - 3.94" / 100 mm guns (4x2 guns), 30.42lbs / 13.80kg shells, 1931 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
10 - 1.46" / 37.0 mm guns (6 mounts), 1.55lbs / 0.70kg shells, 1930 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 2 raised mounts
Weight of broadside 5,053 lbs / 2,292 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 6.00" / 152 mm 320.00 ft / 97.54 m 10.50 ft / 3.20 m
Ends: 4.00" / 102 mm 209.00 ft / 63.70 m 10.50 ft / 3.20 m
Upper: 3.00" / 76 mm 320.00 ft / 97.54 m 8.00 ft / 2.44 m
Main Belt covers 93 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 8.00" / 203 mm 4.50" / 114 mm 8.00" / 203 mm
2nd: 8.00" / 203 mm 4.50" / 114 mm 6.00" / 152 mm
3rd: 3.00" / 76 mm - 3.00" / 76 mm
4th: 0.98" / 25 mm 0.59" / 15 mm -
5th: 0.39" / 10 mm - -

- Armour deck: 4.00" / 102 mm, Conning tower: 8.00" / 203 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 82,000 shp / 61,172 Kw = 29.04 kts
Range 10,000nm at 10.00 kts
Bunker at max displacement = 1,353 tons

Complement:
684 - 890

Cost:
£1.395 million / $5.579 million

Distribution of weights at normal displacement:
Armament: 633 tons, 4.2 %
Armour: 4,676 tons, 30.7 %
- Belts: 1,542 tons, 10.1 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 1,043 tons, 6.9 %
- Armour Deck: 1,985 tons, 13.1 %
- Conning Tower: 106 tons, 0.7 %
Machinery: 2,741 tons, 18.0 %
Hull, fittings & equipment: 5,591 tons, 36.8 %
Fuel, ammunition & stores: 1,513 tons, 9.9 %
Miscellaneous weights: 55 tons, 0.4 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
16,756 lbs / 7,600 Kg = 33.5 x 10.0 " / 254 mm shells or 2.1 torpedoes
Stability (Unstable if below 1.00): 1.02
Metacentric height 3.4 ft / 1.0 m
Roll period: 17.1 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.58
Seaboat quality (Average = 1.00): 0.90

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.516
Length to Beam Ratio: 7.05 : 1
'Natural speed' for length: 23.00 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 67
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: 24.50 ft / 7.47 m
- Forecastle (20 %): 21.50 ft / 6.55 m
- Mid (65 %): 21.50 ft / 6.55 m (14.50 ft / 4.42 m aft of break)
- Quarterdeck (20 %): 14.50 ft / 4.42 m
- Stern: 14.50 ft / 4.42 m
- Average freeboard: 19.29 ft / 5.88 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 91.6 %
- Above water (accommodation/working, high = better): 147.5 %
Waterplane Area: 26,825 Square feet or 2,492 Square metres
Displacement factor (Displacement / loading): 100 %
Structure weight / hull surface area: 137 lbs/sq ft or 671 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.94
- Longitudinal: 1.85
- Overall: 1.01
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

16

Sunday, April 20th 2008, 6:14pm

They will also have to act as escorts for the replacement (if it is laid down according to plan)

Kaveh Replacement, Persia MSC laid down 1940

Displacement:
24 410 t light; 25 323 t standard; 26 496 t normal; 27 435 t full load

Dimensions: Length overall / water x beam x draught
820,21 ft / 820,21 ft x 78,74 ft (Bulges 85,30 ft) x 26,25 ft (normal load)
250,00 m / 250,00 m x 24,00 m (Bulges 26,00 m) x 8,00 m

Armament:
6 - 12,00" / 305 mm guns (3x2 guns), 864,00lbs / 391,90kg shells, 1940 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
20 - 5,12" / 130 mm guns (10x2 guns), 67,03lbs / 30,40kg shells, 1940 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships
32 - 1,57" / 40,0 mm guns (16x2 guns), 1,95lbs / 0,88kg shells, 1940 Model
Breech loading guns in deck mounts
on side, evenly spread
Weight of broadside 6 587 lbs / 2 988 kg
Shells per gun, main battery: 100

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 9,45" / 240 mm 561,02 ft / 171,00 m 13,12 ft / 4,00 m
Ends: Unarmoured
Upper: 2,36" / 60 mm 511,81 ft / 156,00 m 7,87 ft / 2,40 m
Main Belt covers 105 % of normal length

- Torpedo Bulkhead and Bulges:
2,36" / 60 mm 511,81 ft / 156,00 m 19,69 ft / 6,00 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 11,8" / 300 mm 7,87" / 200 mm 7,87" / 200 mm
2nd: 2,36" / 60 mm 2,36" / 60 mm -
3rd: 0,79" / 20 mm - -

- Armour deck: 3,94" / 100 mm, Conning tower: 3,94" / 100 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 3 shafts, 136 728 shp / 101 999 Kw = 33,00 kts
Range 10 000nm at 11,00 kts
Bunker at max displacement = 2 112 tons

Complement:
1 037 - 1 349

Cost:
£12,347 million / $49,388 million

Distribution of weights at normal displacement:
Armament: 823 tons, 3,1 %
Armour: 8 946 tons, 33,8 %
- Belts: 3 261 tons, 12,3 %
- Torpedo bulkhead: 881 tons, 3,3 %
- Armament: 1 454 tons, 5,5 %
- Armour Deck: 3 274 tons, 12,4 %
- Conning Tower: 75 tons, 0,3 %
Machinery: 3 656 tons, 13,8 %
Hull, fittings & equipment: 10 685 tons, 40,3 %
Fuel, ammunition & stores: 2 086 tons, 7,9 %
Miscellaneous weights: 300 tons, 1,1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
41 324 lbs / 18 744 Kg = 47,8 x 12,0 " / 305 mm shells or 6,2 torpedoes
Stability (Unstable if below 1.00): 1,07
Metacentric height 4,0 ft / 1,2 m
Roll period: 18,0 seconds
Steadiness - As gun platform (Average = 50 %): 75 %
- Recoil effect (Restricted arc if above 1.00): 0,62
Seaboat quality (Average = 1.00): 1,27

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0,505
Length to Beam Ratio: 9,62 : 1
'Natural speed' for length: 32,76 kts
Power going to wave formation at top speed: 50 %
Trim (Max stability = 0, Max steadiness = 100): 59
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: 32,81 ft / 10,00 m
- Forecastle (20 %): 22,97 ft / 7,00 m
- Mid (50 %): 22,97 ft / 7,00 m
- Quarterdeck (15 %): 22,97 ft / 7,00 m
- Stern: 22,97 ft / 7,00 m
- Average freeboard: 23,75 ft / 7,24 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 93,9 %
- Above water (accommodation/working, high = better): 189,6 %
Waterplane Area: 44 958 Square feet or 4 177 Square metres
Displacement factor (Displacement / loading): 114 %
Structure weight / hull surface area: 154 lbs/sq ft or 750 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1,00
- Longitudinal: 1,07
- Overall: 1,01
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

This post has been edited 1 times, last edit by "Vukovlad" (Apr 20th 2008, 6:18pm)


17

Sunday, April 20th 2008, 6:27pm

I would stick with the general Isfahan design but reducing speed to 34knots and cost to 2,000 tons. Basiclly the smallest ship where you can fit 6x130mm guns and 34knots.

That or build a true light cruiser, 4,000 tons and 12x130mm.

This post has been edited 1 times, last edit by "Desertfox" (Apr 20th 2008, 6:28pm)


18

Sunday, April 20th 2008, 6:33pm

the problem with the Isfahans is that i dont like them...

Expensive, short ranged and weak armament as for a CL why arm them with DD guns?

19

Sunday, April 20th 2008, 6:51pm

Well if you don't like them... Mexico would be interested in taking them of your hands for a reasonable price. ;)

20

Sunday, April 20th 2008, 6:59pm

PM an offer