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1

Wednesday, April 9th 2008, 1:26am

Persepolis replacement?

Agas, Persia MW laid down 1936

Displacement:
1 025 t light; 1 112 t standard; 1 232 t normal; 1 328 t full load

Dimensions: Length overall / water x beam x draught
262,47 ft / 262,47 ft x 26,25 ft x 11,81 ft (normal load)
80,00 m / 80,00 m x 8,00 m x 3,60 m

Armament:
4 - 5,12" / 130 mm guns (2x2 guns), 67,03lbs / 30,40kg shells, 1936 Model
Dual purpose guns in turrets (on barbettes)
on centreline ends, evenly spread
12 - 0,98" / 25,0 mm guns (6x2 guns), 0,48lbs / 0,22kg shells, 1936 Model
Anti-aircraft guns in deck mounts
on side, all amidships
Weight of broadside 274 lbs / 124 kg
Shells per gun, main battery: 400

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1,97" / 50 mm 137,80 ft / 42,00 m 5,54 ft / 1,69 m
Ends: Unarmoured
Main Belt covers 81 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2,36" / 60 mm 1,57" / 40 mm 1,57" / 40 mm
2nd: 0,79" / 20 mm - -

- Armour deck: 1,57" / 40 mm, Conning tower: 2,36" / 60 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 6 276 shp / 4 682 Kw = 22,00 kts
Range 3 000nm at 16,00 kts
Bunker at max displacement = 216 tons

Complement:
103 - 135

Cost:
£0,471 million / $1,883 million

Distribution of weights at normal displacement:
Armament: 34 tons, 2,8 %
Armour: 256 tons, 20,8 %
- Belts: 65 tons, 5,3 %
- Torpedo bulkhead: 0 tons, 0,0 %
- Armament: 43 tons, 3,5 %
- Armour Deck: 143 tons, 11,6 %
- Conning Tower: 6 tons, 0,5 %
Machinery: 176 tons, 14,3 %
Hull, fittings & equipment: 478 tons, 38,8 %
Fuel, ammunition & stores: 207 tons, 16,8 %
Miscellaneous weights: 80 tons, 6,5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1 813 lbs / 822 Kg = 27,0 x 5,1 " / 130 mm shells or 0,8 torpedoes
Stability (Unstable if below 1.00): 1,09
Metacentric height 0,8 ft / 0,2 m
Roll period: 12,4 seconds
Steadiness - As gun platform (Average = 50 %): 42 %
- Recoil effect (Restricted arc if above 1.00): 0,85
Seaboat quality (Average = 1.00): 1,20

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0,530
Length to Beam Ratio: 10,00 : 1
'Natural speed' for length: 18,43 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 30
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: 17,49 ft / 5,33 m
- Forecastle (20 %): 11,12 ft / 3,39 m
- Mid (50 %): 11,12 ft / 3,39 m
- Quarterdeck (15 %): 11,12 ft / 3,39 m
- Stern: 11,12 ft / 3,39 m
- Average freeboard: 11,63 ft / 3,55 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 78,9 %
- Above water (accommodation/working, high = better): 101,0 %
Waterplane Area: 4 910 Square feet or 456 Square metres
Displacement factor (Displacement / loading): 128 %
Structure weight / hull surface area: 49 lbs/sq ft or 238 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,86
- Longitudinal: 3,25
- Overall: 0,98
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Good seaboat, rides out heavy weather easily

This post has been edited 1 times, last edit by "Vukovlad" (Apr 9th 2008, 3:33am)


2

Wednesday, April 9th 2008, 1:34am

Revised version that can fire its guns...

Agas, Persia MW laid down 1936

Displacement:
1 072 t light; 1 112 t standard; 1 232 t normal; 1 328 t full load

Dimensions: Length overall / water x beam x draught
262,47 ft / 262,47 ft x 26,25 ft x 11,81 ft (normal load)
80,00 m / 80,00 m x 8,00 m x 3,60 m

Armament:
4 - 5,12" / 130 mm guns (2x2 guns), 67,03lbs / 30,40kg shells, 1936 Model
Dual purpose guns in turrets (on barbettes)
on centreline ends, evenly spread
12 - 0,98" / 25,0 mm guns (6x2 guns), 0,48lbs / 0,22kg shells, 1936 Model
Anti-aircraft guns in deck mounts
on side, all amidships
Weight of broadside 274 lbs / 124 kg
Shells per gun, main battery: 100

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1,97" / 50 mm 118,77 ft / 36,20 m 5,54 ft / 1,69 m
Ends: Unarmoured
Main Belt covers 70 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2,36" / 60 mm 1,57" / 40 mm 1,57" / 40 mm
2nd: 0,79" / 20 mm - -

- Armour deck: 1,57" / 40 mm, Conning tower: 2,36" / 60 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 4 332 shp / 3 232 Kw = 20,00 kts
Range 3 000nm at 16,00 kts
Bunker at max displacement = 216 tons

Complement:
103 - 135

Cost:
£0,439 million / $1,757 million

Distribution of weights at normal displacement:
Armament: 34 tons, 2,8 %
Armour: 249 tons, 20,2 %
- Belts: 57 tons, 4,7 %
- Torpedo bulkhead: 0 tons, 0,0 %
- Armament: 43 tons, 3,5 %
- Armour Deck: 143 tons, 11,6 %
- Conning Tower: 6 tons, 0,5 %
Machinery: 122 tons, 9,9 %
Hull, fittings & equipment: 587 tons, 47,6 %
Fuel, ammunition & stores: 160 tons, 13,0 %
Miscellaneous weights: 80 tons, 6,5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
2 339 lbs / 1 061 Kg = 34,9 x 5,1 " / 130 mm shells or 1,1 torpedoes
Stability (Unstable if below 1.00): 1,04
Metacentric height 0,7 ft / 0,2 m
Roll period: 13,0 seconds
Steadiness - As gun platform (Average = 50 %): 52 %
- Recoil effect (Restricted arc if above 1.00): 0,95
Seaboat quality (Average = 1.00): 1,73

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0,530
Length to Beam Ratio: 10,00 : 1
'Natural speed' for length: 18,43 kts
Power going to wave formation at top speed: 53 %
Trim (Max stability = 0, Max steadiness = 100): 30
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: 17,49 ft / 5,33 m
- Forecastle (20 %): 11,12 ft / 3,39 m
- Mid (50 %): 11,12 ft / 3,39 m
- Quarterdeck (15 %): 11,12 ft / 3,39 m
- Stern: 11,12 ft / 3,39 m
- Average freeboard: 11,63 ft / 3,55 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 60,8 %
- Above water (accommodation/working, high = better): 101,0 %
Waterplane Area: 4 910 Square feet or 456 Square metres
Displacement factor (Displacement / loading): 146 %
Structure weight / hull surface area: 60 lbs/sq ft or 293 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1,07
- Longitudinal: 4,07
- Overall: 1,22
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

3

Wednesday, April 9th 2008, 1:43am

With only 100 shells per gun, you'll be out of ammo fairly quickly.

4

Wednesday, April 9th 2008, 1:47am

More shells

Agas, Persia MW laid down 1936

Displacement:
1 064 t light; 1 112 t standard; 1 232 t normal; 1 328 t full load

Dimensions: Length overall / water x beam x draught
262,47 ft / 262,47 ft x 26,25 ft x 11,81 ft (normal load)
80,00 m / 80,00 m x 8,00 m x 3,60 m

Armament:
4 - 5,12" / 130 mm guns (2x2 guns), 67,03lbs / 30,40kg shells, 1936 Model
Dual purpose guns in turrets (on barbettes)
on centreline ends, evenly spread
12 - 0,98" / 25,0 mm guns (6x2 guns), 0,48lbs / 0,22kg shells, 1936 Model
Anti-aircraft guns in deck mounts
on side, all amidships
Weight of broadside 274 lbs / 124 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1,97" / 50 mm 118,77 ft / 36,20 m 5,54 ft / 1,69 m
Ends: Unarmoured
Main Belt covers 70 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2,36" / 60 mm 1,57" / 40 mm 1,57" / 40 mm
2nd: 0,79" / 20 mm - -

- Armour deck: 1,57" / 40 mm, Conning tower: 2,36" / 60 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 4 332 shp / 3 232 Kw = 20,00 kts
Range 3 000nm at 16,00 kts
Bunker at max displacement = 216 tons

Complement:
103 - 135

Cost:
£0,438 million / $1,751 million

Distribution of weights at normal displacement:
Armament: 34 tons, 2,8 %
Armour: 249 tons, 20,2 %
- Belts: 57 tons, 4,7 %
- Torpedo bulkhead: 0 tons, 0,0 %
- Armament: 43 tons, 3,5 %
- Armour Deck: 143 tons, 11,6 %
- Conning Tower: 6 tons, 0,5 %
Machinery: 122 tons, 9,9 %
Hull, fittings & equipment: 579 tons, 47,0 %
Fuel, ammunition & stores: 168 tons, 13,6 %
Miscellaneous weights: 80 tons, 6,5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
2 318 lbs / 1 051 Kg = 34,6 x 5,1 " / 130 mm shells or 1,1 torpedoes
Stability (Unstable if below 1.00): 1,04
Metacentric height 0,7 ft / 0,2 m
Roll period: 12,9 seconds
Steadiness - As gun platform (Average = 50 %): 52 %
- Recoil effect (Restricted arc if above 1.00): 0,95
Seaboat quality (Average = 1.00): 1,74

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0,530
Length to Beam Ratio: 10,00 : 1
'Natural speed' for length: 18,43 kts
Power going to wave formation at top speed: 53 %
Trim (Max stability = 0, Max steadiness = 100): 30
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: 17,49 ft / 5,33 m
- Forecastle (20 %): 11,12 ft / 3,39 m
- Mid (50 %): 11,12 ft / 3,39 m
- Quarterdeck (15 %): 11,12 ft / 3,39 m
- Stern: 11,12 ft / 3,39 m
- Average freeboard: 11,63 ft / 3,55 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 61,4 %
- Above water (accommodation/working, high = better): 101,0 %
Waterplane Area: 4 910 Square feet or 456 Square metres
Displacement factor (Displacement / loading): 146 %
Structure weight / hull surface area: 59 lbs/sq ft or 289 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1,05
- Longitudinal: 4,02
- Overall: 1,20
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Misc Weight: are for 80 mines and rails

5

Wednesday, April 9th 2008, 2:47am

Being DP you'll need even more shells. Try 250-300, at say 10 rounds a minute that gives you 25-30 minutes of continuous fire.

If she was a fast mine layer I'd say the shell loadout would be ok but she's slow.

6

Wednesday, April 9th 2008, 3:14am

Fast ships are hard to sim in SS2, tried to sim the Romanian R class and the result was that they would probably sink while in port.

Anyway another possible Persepolis replacement

Ctesiphon, Persia Training ship laid down 1936

Displacement:
3 000 t light; 3 128 t standard; 3 663 t normal; 4 090 t full load

Dimensions: Length overall / water x beam x draught
393,70 ft / 393,70 ft x 36,09 ft x 18,04 ft (normal load)
120,00 m / 120,00 m x 11,00 m x 5,50 m

Armament:
3 - 7,99" / 203 mm guns in single mounts, 255,24lbs / 115,77kg shells, 1936 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward
16 - 1,57" / 40,0 mm guns (8x2 guns), 1,95lbs / 0,88kg shells, 1936 Model
Breech loading guns in deck mounts
on side, all amidships
Weight of broadside 797 lbs / 361 kg
Shells per gun, main battery: 120
8 - 24,0" / 609,6 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2,76" / 70 mm 318,24 ft / 97,00 m 8,69 ft / 2,65 m
Ends: Unarmoured
Main Belt covers 124 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3,15" / 80 mm 1,57" / 40 mm 1,57" / 40 mm
2nd: 0,79" / 20 mm - -

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

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 3 shafts, 27 078 shp / 20 200 Kw = 28,00 kts
Range 5 500nm at 18,00 kts
Bunker at max displacement = 962 tons

Complement:
235 - 306

Cost:
£1,556 million / $6,223 million

Distribution of weights at normal displacement:
Armament: 100 tons, 2,7 %
Armour: 689 tons, 18,8 %
- Belts: 306 tons, 8,3 %
- Torpedo bulkhead: 0 tons, 0,0 %
- Armament: 80 tons, 2,2 %
- Armour Deck: 287 tons, 7,8 %
- Conning Tower: 16 tons, 0,4 %
Machinery: 760 tons, 20,7 %
Hull, fittings & equipment: 1 352 tons, 36,9 %
Fuel, ammunition & stores: 662 tons, 18,1 %
Miscellaneous weights: 100 tons, 2,7 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
4 279 lbs / 1 941 Kg = 16,8 x 8,0 " / 203 mm shells or 1,0 torpedoes
Stability (Unstable if below 1.00): 1,07
Metacentric height 1,2 ft / 0,4 m
Roll period: 13,7 seconds
Steadiness - As gun platform (Average = 50 %): 52 %
- Recoil effect (Restricted arc if above 1.00): 0,88
Seaboat quality (Average = 1.00): 1,15

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0,500
Length to Beam Ratio: 10,91 : 1
'Natural speed' for length: 22,49 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 45
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: 21,82 ft / 6,65 m
- Forecastle (20 %): 13,88 ft / 4,23 m
- Mid (50 %): 13,88 ft / 4,23 m
- Quarterdeck (15 %): 13,88 ft / 4,23 m
- Stern: 13,88 ft / 4,23 m
- Average freeboard: 14,51 ft / 4,42 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 91,3 %
- Above water (accommodation/working, high = better): 54,6 %
Waterplane Area: 9 845 Square feet or 915 Square metres
Displacement factor (Displacement / loading): 118 %
Structure weight / hull surface area: 71 lbs/sq ft or 345 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,92
- Longitudinal: 2,36
- Overall: 1,01
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is cramped

7

Wednesday, April 9th 2008, 3:24am

At 28 knots, you can use the rules allowing the ship to have a strength of 0.75 or higher. Or, if you get the size down below 3,000 tons standard, you can go to a minimum cross-sectional strength of 0.50.

8

Wednesday, April 9th 2008, 3:28am

Why would I want to? I still dont understand the finer points

Posted a 400 shells Agas in the first post

This post has been edited 1 times, last edit by "Vukovlad" (Apr 9th 2008, 3:34am)


9

Wednesday, April 9th 2008, 3:42am

If you have a lower requirement for strength, that makes it easier to fit more things onto the hull, resulting in a more capable vessel. For instance, compare the German Lebrect Maas class heavy destroyers here http://88.198.26.117/kunden/oponn/wbblit…46283#post46283 to your Ctesiphon design.

10

Wednesday, April 9th 2008, 3:43am

Depends, where are your mines being laid? If they are defensive mines then speed isn't really nessassary, but heavier AA is always a benifit in case your minelayer gets caught in daylight hours.

If you want a speedy offensive minlayer then applying the rules Hrolf specified would be an asset.

12

Wednesday, April 9th 2008, 4:22am

The problem is that when I try to cut weight or add guns I end up with "End on fire only"

13

Wednesday, April 9th 2008, 4:25am

It seems you're looking for a ship with rather... disingenuous capabilities. Are you wanting a small CDS, a gunboat, a training ship, or a minelayer?

14

Wednesday, April 9th 2008, 4:25am

Heh, well, 8" guns on 3,000 ton hulls, that doesn't surprise me too much. Your 1,000 ton hull is also pretty well armed, with 4 130mm guns. So, on those hulls, add speed.

15

Wednesday, April 9th 2008, 4:29am

Quoted

Originally posted by Brockpaine
It seems you're looking for a ship with rather... disingenuous capabilities. Are you wanting a small CDS, a gunboat, a training ship, or a minelayer?


Agas = Minewarfare, Ctesiphon =Training ship

16

Wednesday, April 9th 2008, 5:16am

Okay then, I have a design for the minelayer, based on the OTL British Abdiel. Made shorter for a type 1 slip...

Quoted

Agas, Neutral Fast Minelayer laid down 1940

Displacement:
2,626 t light; 2,709 t standard; 3,000 t normal; 3,233 t full load

Dimensions: Length overall / water x beam x draught
392.06 ft / 388.00 ft x 41.00 ft x 13.00 ft (normal load)
119.50 m / 118.26 m x 12.50 m x 3.96 m

Armament:
6 - 4.92" / 125 mm guns (3x2 guns), 59.59lbs / 27.03kg shells, 1940 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, majority forward, 1 raised mount - superfiring
16 - 1.57" / 40.0 mm guns (4x4 guns), 1.95lbs / 0.89kg shells, 1940 Model
Anti-aircraft guns in deck mounts
on side, all amidships
16 - 0.79" / 20.0 mm guns (4x4 guns), 0.24lbs / 0.11kg shells, 1940 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
8 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1940 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 393 lbs / 178 kg
Shells per gun, main battery: 100

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.00" / 76 mm 1.00" / 25 mm 2.00" / 51 mm
2nd: 1.00" / 25 mm 0.50" / 13 mm -
3rd: 1.00" / 25 mm 0.50" / 13 mm -

- Conning tower: 3.00" / 76 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 62,393 shp / 46,545 Kw = 33.75 kts
Range 5,000nm at 15.00 kts
Bunker at max displacement = 524 tons

Complement:
202 - 263

Cost:
£2.032 million / $8.126 million

Distribution of weights at normal displacement:
Armament: 49 tons, 1.6 %
Armour: 56 tons, 1.9 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 43 tons, 1.4 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 13 tons, 0.4 %
Machinery: 1,467 tons, 48.9 %
Hull, fittings & equipment: 703 tons, 23.4 %
Fuel, ammunition & stores: 374 tons, 12.5 %
Miscellaneous weights: 350 tons, 11.7 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
633 lbs / 287 Kg = 10.6 x 4.9 " / 125 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 1.6 ft / 0.5 m
Roll period: 13.7 seconds
Steadiness - As gun platform (Average = 50 %): 58 %
- Recoil effect (Restricted arc if above 1.00): 0.39
Seaboat quality (Average = 1.00): 0.81

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.508
Length to Beam Ratio: 9.46 : 1
'Natural speed' for length: 19.70 kts
Power going to wave formation at top speed: 69 %
Trim (Max stability = 0, Max steadiness = 100): 72
Bow angle (Positive = bow angles forward): 10.00 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 (20 %): 16.00 ft / 4.88 m
- Mid (50 %): 16.00 ft / 4.88 m
- Quarterdeck (15 %): 16.00 ft / 4.88 m
- Stern: 16.00 ft / 4.88 m
- Average freeboard: 16.56 ft / 5.05 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 182.6 %
- Above water (accommodation/working, high = better): 161.0 %
Waterplane Area: 10,674 Square feet or 992 Square metres
Displacement factor (Displacement / loading): 73 %
Structure weight / hull surface area: 37 lbs/sq ft or 179 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.46
- Longitudinal: 1.30
- Overall: 0.51
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather


And an 8" gunned training ship...

Quoted

Ctesiphon, Neutral Training vessel laid down 1940

Displacement:
3,653 t light; 3,806 t standard; 4,158 t normal; 4,440 t full load

Dimensions: Length overall / water x beam x draught
385.00 ft / 385.00 ft x 50.00 ft x 18.00 ft (normal load)
117.35 m / 117.35 m x 15.24 m x 5.49 m

Armament:
2 - 8.00" / 203 mm guns in single mounts, 256.00lbs / 116.12kg shells, 1940 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
4 - 5.00" / 127 mm guns (2x2 guns), 62.50lbs / 28.35kg shells, 1940 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, all raised mounts
8 - 1.46" / 37.0 mm guns (4x2 guns), 1.55lbs / 0.70kg shells, 1940 Model
Anti-aircraft guns in deck mounts with hoists
on side, evenly spread
Weight of broadside 774 lbs / 351 kg
Shells per gun, main battery: 150
4 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.00" / 102 mm 250.25 ft / 76.28 m 8.49 ft / 2.59 m
Ends: Unarmoured
Main Belt covers 100 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 4.00" / 102 mm 3.00" / 76 mm 3.00" / 76 mm
2nd: 2.00" / 51 mm 1.00" / 25 mm 1.00" / 25 mm
3rd: 2.00" / 51 mm 1.00" / 25 mm 1.00" / 25 mm

- Armour deck: 3.00" / 76 mm, Conning tower: 5.00" / 127 mm

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 18,294 shp / 13,647 Kw = 24.00 kts
Range 5,000nm at 15.00 kts
Bunker at max displacement = 634 tons

Complement:
258 - 336

Cost:
£1.666 million / $6.664 million

Distribution of weights at normal displacement:
Armament: 97 tons, 2.3 %
Armour: 1,167 tons, 28.1 %
- Belts: 360 tons, 8.7 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 113 tons, 2.7 %
- Armour Deck: 666 tons, 16.0 %
- Conning Tower: 28 tons, 0.7 %
Machinery: 489 tons, 11.8 %
Hull, fittings & equipment: 1,625 tons, 39.1 %
Fuel, ammunition & stores: 505 tons, 12.1 %
Miscellaneous weights: 275 tons, 6.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
7,551 lbs / 3,425 Kg = 29.5 x 8.0 " / 203 mm shells or 1.9 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 2.1 ft / 0.6 m
Roll period: 14.4 seconds
Steadiness - As gun platform (Average = 50 %): 65 %
- Recoil effect (Restricted arc if above 1.00): 0.39
Seaboat quality (Average = 1.00): 1.44

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.420
Length to Beam Ratio: 7.70 : 1
'Natural speed' for length: 19.62 kts
Power going to wave formation at top speed: 53 %
Trim (Max stability = 0, Max steadiness = 100): 45
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: 24.00 ft / 7.32 m
- Forecastle (20 %): 15.00 ft / 4.57 m
- Mid (50 %): 15.00 ft / 4.57 m
- Quarterdeck (15 %): 15.00 ft / 4.57 m
- Stern: 15.00 ft / 4.57 m
- Average freeboard: 15.72 ft / 4.79 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 64.3 %
- Above water (accommodation/working, high = better): 113.9 %
Waterplane Area: 12,001 Square feet or 1,115 Square metres
Displacement factor (Displacement / loading): 130 %
Structure weight / hull surface area: 83 lbs/sq ft or 404 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.90
- Longitudinal: 2.37
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Good seaboat, rides out heavy weather easily

The second design I'm not too hot on, personally. In wartime she'd make a marginal convoy escort against torpedo boats and perhaps a lone destroyer, but realistically she'd have "TARGET" written all over her.

17

Wednesday, April 9th 2008, 5:27am

Frankly I dont get the first design, decent range but a poor seaboat, twice as heavy as the original Agas and still not able to outrun cruisers or destroyers.

Ctesiphon (II), Persia Training ship laid down 1936

Displacement:
2 860 t light; 2 975 t standard; 3 496 t normal; 3 913 t full load

Dimensions: Length overall / water x beam x draught
393,70 ft / 393,70 ft x 34,45 ft x 18,04 ft (normal load)
120,00 m / 120,00 m x 10,50 m x 5,50 m

Armament:
6 - 5,91" / 150 mm guns (3x2 guns), 102,98lbs / 46,71kg shells, 1936 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
16 - 1,57" / 40,0 mm guns (8x2 guns), 1,95lbs / 0,88kg shells, 1936 Model
Breech loading guns in deck mounts
on side, all amidships
Weight of broadside 649 lbs / 294 kg
Shells per gun, main battery: 120
8 - 24,0" / 609,6 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3,15" / 80 mm 305,12 ft / 93,00 m 8,69 ft / 2,65 m
Ends: Unarmoured
Main Belt covers 119 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3,15" / 80 mm 1,57" / 40 mm 1,57" / 40 mm
2nd: 0,79" / 20 mm - -

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

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 3 shafts, 34 644 shp / 25 844 Kw = 30,00 kts
Range 5 500nm at 18,00 kts
Bunker at max displacement = 939 tons

Complement:
226 - 295

Cost:
£1,605 million / $6,419 million

Distribution of weights at normal displacement:
Armament: 81 tons, 2,3 %
Armour: 723 tons, 20,7 %
- Belts: 336 tons, 9,6 %
- Torpedo bulkhead: 0 tons, 0,0 %
- Armament: 97 tons, 2,8 %
- Armour Deck: 274 tons, 7,8 %
- Conning Tower: 16 tons, 0,4 %
Machinery: 972 tons, 27,8 %
Hull, fittings & equipment: 984 tons, 28,1 %
Fuel, ammunition & stores: 636 tons, 18,2 %
Miscellaneous weights: 100 tons, 2,9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
2 235 lbs / 1 014 Kg = 21,7 x 5,9 " / 150 mm shells or 0,7 torpedoes
Stability (Unstable if below 1.00): 1,03
Metacentric height 1,1 ft / 0,3 m
Roll period: 13,9 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0,94
Seaboat quality (Average = 1.00): 1,05

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0,500
Length to Beam Ratio: 11,43 : 1
'Natural speed' for length: 22,42 kts
Power going to wave formation at top speed: 61 %
Trim (Max stability = 0, Max steadiness = 100): 48
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: 21,82 ft / 6,65 m
- Forecastle (20 %): 13,88 ft / 4,23 m
- Mid (50 %): 13,88 ft / 4,23 m
- Quarterdeck (15 %): 13,88 ft / 4,23 m
- Stern: 13,88 ft / 4,23 m
- Average freeboard: 14,51 ft / 4,42 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 111,1 %
- Above water (accommodation/working, high = better): 51,6 %
Waterplane Area: 9 397 Square feet or 873 Square metres
Displacement factor (Displacement / loading): 102 %
Structure weight / hull surface area: 52 lbs/sq ft or 252 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,68
- Longitudinal: 1,81
- Overall: 0,75
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is cramped

18

Wednesday, April 9th 2008, 6:29am

Quoted

Originally posted by Vukovlad
Frankly I dont get the first design, decent range but a poor seaboat, twice as heavy as the original Agas and still not able to outrun cruisers or destroyers.

That's partly a result of Springsharp's inability to sim extremely high-speed vessels. The highest speed I could get without having it fall apart was 33.75 knots... but the Abdiel-class minelayer, which I based it on, could make 38 knots. That, I believe, could outrun a destroyer. :)

True, the seaboat quality is not that great, but remember again that's partly a factor of Springsharp disliking ultrafast designs. It's also partly because the ship has a high L/B ratio, meaning I had to play around a lot more with the trim to get a favorable stability.

Quoted

Originally posted by Vukovlad
Ctesiphon (II), Persia Training ship laid down 1936

This is a destroyer leader or a super-light cruiser, not a training ship. :P

This post has been edited 1 times, last edit by "Brockpaine" (Apr 9th 2008, 6:31am)


19

Wednesday, April 9th 2008, 7:09am

Seakeeping shouldn't be an issue in the Persian gulf.

20

Wednesday, April 9th 2008, 12:09pm

Quoted

Originally posted by Brockpaine

Quoted

Originally posted by Vukovlad
Frankly I dont get the first design, decent range but a poor seaboat, twice as heavy as the original Agas and still not able to outrun cruisers or destroyers.

That's partly a result of Springsharp's inability to sim extremely high-speed vessels. The highest speed I could get without having it fall apart was 33.75 knots... but the Abdiel-class minelayer, which I based it on, could make 38 knots. That, I believe, could outrun a destroyer. :)

True, the seaboat quality is not that great, but remember again that's partly a factor of Springsharp disliking ultrafast designs. It's also partly because the ship has a high L/B ratio, meaning I had to play around a lot more with the trim to get a favorable stability.


Part of the problem is that you forgot the transom stern, it makes a large difference on ships of this size.