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1

Friday, October 31st 2008, 8:16pm

First try...

A first try at a CV

Simorgh, Persia CV laid down 1938

Displacement:
22 736 t light; 23 314 t standard; 24 906 t normal; 26 179 t full load

Dimensions: Length overall / water x beam x draught
721,78 ft / 721,78 ft x 98,43 ft (Bulges 111,55 ft) x 19,69 ft (normal load)
220,00 m / 220,00 m x 30,00 m (Bulges 34,00 m) x 6,00 m

Armament:
12 - 5,12" / 130 mm guns (6x2 guns), 67,03lbs / 30,40kg shells, 1938 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships, 4 raised mounts - superfiring
48 - 1,57" / 40,0 mm guns (12x4 guns), 1,95lbs / 0,88kg shells, 1938 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 898 lbs / 407 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3,15" / 80 mm 469,16 ft / 143,00 m 13,12 ft / 4,00 m
Ends: Unarmoured
Upper: 2,17" / 55 mm 469,16 ft / 143,00 m 8,01 ft / 2,44 m
Main Belt covers 100 % of normal length
Main belt does not fully cover magazines and engineering spaces

- Torpedo Bulkhead and Bulges:
0,79" / 20 mm 469,16 ft / 143,00 m 18,08 ft / 5,51 m

- Armour deck: 1,77" / 45 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 146 412 shp / 109 223 Kw = 33,00 kts
Range 5 000nm at 18,00 kts
Bunker at max displacement = 2 865 tons

Complement:
990 - 1 288

Cost:
£8,180 million / $32,721 million

Distribution of weights at normal displacement:
Armament: 112 tons, 0,5 %
Armour: 3 122 tons, 12,5 %
- Belts: 1 183 tons, 4,8 %
- Torpedo bulkhead: 247 tons, 1,0 %
- Armament: 0 tons, 0,0 %
- Armour Deck: 1 692 tons, 6,8 %
- Conning Tower: 0 tons, 0,0 %
Machinery: 4 009 tons, 16,1 %
Hull, fittings & equipment: 9 493 tons, 38,1 %
Fuel, ammunition & stores: 2 169 tons, 8,7 %
Miscellaneous weights: 6 000 tons, 24,1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
44 108 lbs / 20 007 Kg = 658,0 x 5,1 " / 130 mm shells or 6,1 torpedoes
Stability (Unstable if below 1.00): 1,13
Metacentric height 6,2 ft / 1,9 m
Roll period: 18,9 seconds
Steadiness - As gun platform (Average = 50 %): 75 %
- Recoil effect (Restricted arc if above 1.00): 0,05
Seaboat quality (Average = 1.00): 1,12

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0,550
Length to Beam Ratio: 6,47 : 1
'Natural speed' for length: 31,62 kts
Power going to wave formation at top speed: 58 %
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: 32,81 ft / 10,00 m
- Forecastle (20 %): 29,53 ft / 9,00 m
- Mid (50 %): 29,53 ft / 9,00 m
- Quarterdeck (15 %): 29,53 ft / 9,00 m
- Stern: 29,53 ft / 9,00 m
- Average freeboard: 29,79 ft / 9,08 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 103,6 %
- Above water (accommodation/working, high = better): 293,2 %
Waterplane Area: 51 617 Square feet or 4 795 Square metres
Displacement factor (Displacement / loading): 138 %
Structure weight / hull surface area: 130 lbs/sq ft or 637 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,96
- Longitudinal: 1,51
- Overall: 1,00
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



As usual comments are welcome

This post has been edited 2 times, last edit by "Vukovlad" (Oct 31st 2008, 8:24pm)


2

Friday, October 31st 2008, 8:28pm

The ship can carry - supposedly - 94 aircraft while you only have weight for 62. Cut off two or three knots of speed, cut the belt armor and upper, and add weight... or alternately, make your ship smaller.

3

Friday, October 31st 2008, 8:33pm

I was thinking of a 60 aircraft CAG and armored flightdeck in the British tradition, is that too few aircraft?

4

Friday, October 31st 2008, 8:36pm

A version that has protected engines...

Simorgh, Persia CV laid down 1938

Displacement:
22 736 t light; 23 314 t standard; 24 906 t normal; 26 179 t full load

Dimensions: Length overall / water x beam x draught
721,78 ft / 721,78 ft x 98,43 ft (Bulges 111,55 ft) x 19,69 ft (normal load)
220,00 m / 220,00 m x 30,00 m (Bulges 34,00 m) x 6,00 m

Armament:
12 - 5,12" / 130 mm guns (6x2 guns), 67,03lbs / 30,40kg shells, 1938 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships, 4 raised mounts - superfiring
48 - 1,57" / 40,0 mm guns (12x4 guns), 1,95lbs / 0,88kg shells, 1938 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 898 lbs / 407 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3,15" / 80 mm 492,13 ft / 150,00 m 13,12 ft / 4,00 m
Ends: Unarmoured
Upper: 1,77" / 45 mm 492,13 ft / 150,00 m 8,01 ft / 2,44 m
Main Belt covers 105 % of normal length

- Torpedo Bulkhead and Bulges:
0,79" / 20 mm 656,17 ft / 200,00 m 18,08 ft / 5,51 m

- Armour deck: 1,77" / 45 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 146 412 shp / 109 223 Kw = 33,00 kts
Range 5 000nm at 18,00 kts
Bunker at max displacement = 2 865 tons

Complement:
990 - 1 288

Cost:
£8,180 million / $32,721 million

Distribution of weights at normal displacement:
Armament: 112 tons, 0,5 %
Armour: 3 200 tons, 12,9 %
- Belts: 1 163 tons, 4,7 %
- Torpedo bulkhead: 346 tons, 1,4 %
- Armament: 0 tons, 0,0 %
- Armour Deck: 1 692 tons, 6,8 %
- Conning Tower: 0 tons, 0,0 %
Machinery: 4 009 tons, 16,1 %
Hull, fittings & equipment: 9 415 tons, 37,8 %
Fuel, ammunition & stores: 2 169 tons, 8,7 %
Miscellaneous weights: 6 000 tons, 24,1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
44 002 lbs / 19 959 Kg = 656,4 x 5,1 " / 130 mm shells or 6,4 torpedoes
Stability (Unstable if below 1.00): 1,13
Metacentric height 6,2 ft / 1,9 m
Roll period: 18,8 seconds
Steadiness - As gun platform (Average = 50 %): 75 %
- Recoil effect (Restricted arc if above 1.00): 0,05
Seaboat quality (Average = 1.00): 1,12

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0,550
Length to Beam Ratio: 6,47 : 1
'Natural speed' for length: 31,62 kts
Power going to wave formation at top speed: 58 %
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: 32,81 ft / 10,00 m
- Forecastle (20 %): 29,53 ft / 9,00 m
- Mid (50 %): 29,53 ft / 9,00 m
- Quarterdeck (15 %): 29,53 ft / 9,00 m
- Stern: 29,53 ft / 9,00 m
- Average freeboard: 29,79 ft / 9,08 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 103,6 %
- Above water (accommodation/working, high = better): 293,2 %
Waterplane Area: 51 617 Square feet or 4 795 Square metres
Displacement factor (Displacement / loading): 137 %
Structure weight / hull surface area: 129 lbs/sq ft or 631 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,95
- Longitudinal: 1,50
- Overall: 1,00
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

5

Friday, October 31st 2008, 10:41pm

Quoted

Originally posted by Vukovlad
I was thinking of a 60 aircraft CAG and armored flightdeck in the British tradition, is that too few aircraft?

I'd say 2/3rds of capacity is right if you want an armoured flight deck. Although I understand why you'd want to armour the flight deck - investments need to be protected after all - all of my research and musings indicate armoured flight decks are a good way to waste your ship. This is pretty clearly demonstrated by war experience.

6

Friday, October 31st 2008, 10:46pm

Which, of course, is EXTREMELY scant at this point in time. :)

7

Friday, October 31st 2008, 10:54pm

Armoured flightdecks are usefull, armoured hangars along with armoured decks on the other hand are the real waste. It simply exchanges aircraft numbers for survivability making the carrier less efiicient in its intended role.

8

Friday, October 31st 2008, 10:54pm

Quoted

Originally posted by Hrolf Hakonson
Which, of course, is EXTREMELY scant at this point in time. :)

Exactly.

However, the USN came to the proper conclusion without having the war experience. :D

9

Friday, October 31st 2008, 10:55pm

Well to be fair, the British expected their carriers to be in more enclosed waterways so armour was more appealing.

10

Friday, October 31st 2008, 11:05pm

Quoted

Originally posted by thesmilingassassin
Well to be fair, the British expected their carriers to be in more enclosed waterways so armour was more appealing.

Pre-war, they also didn't have the aircraft available in the FAA; and they were also operating under the assumption that "The bomber will always get through." That has already been disproven in the South American War - I recall Argentine fighters felling a majority of B-17s from one raid.

The USN, as I understand, preferred to launch massive strikes and valued the larger airgroup over internal hanger protection. The British wanted to protect their carriers with the internal hanger, at the cost of airgroup. It'll mostly be doctrine driving design, at this point.

11

Friday, October 31st 2008, 11:43pm

Restricting the hangar capacity to 2/3rds isn't accurate. The difference in complements mostly comes down to the RN not extensively operating a deck park like the USN and the difference in aircraft size. The USN typically had a great deal more fighters in the airgroup makeup and these are smaller.

HMS Implacable could carry a maximum of 113 aircraft but typically operated 80 with 48 fighters. For a 4000ton larger Essex class, the number was 103 with 73 being fighters. You've got fairly similar levels of offensive power available.

Unarmoured flight decks only really make sense for the USN where there are a massive amount of aircraft and pilots to replenish losses. Other navies didn't have that luxury. The FAA for example had 300 aircraft for most of the 1930s.

You've got a lot of trade-offs and it all depends on what role you envisage and what threats there are.

Italy has gone for armoured flight decks on the most recent carriers with a loss of around 20 in aircraft complement. However, its difficult to operate large numbers of aircraft efficiently and. Given the limited numbers of aircraft available, the limited number of aircraft carriers and the probability of operating within range of land power it makes sense.

This post has been edited 1 times, last edit by "Red Admiral" (Oct 31st 2008, 11:44pm)


12

Saturday, November 1st 2008, 1:34am

A slow version with increased CAG

Simorgh, Persia CV laid down 1938

Displacement:
22 931 t light; 23 509 t standard; 24 906 t normal; 26 024 t full load

Dimensions: Length overall / water x beam x draught
721,78 ft / 721,78 ft x 98,43 ft (Bulges 111,55 ft) x 19,69 ft (normal load)
220,00 m / 220,00 m x 30,00 m (Bulges 34,00 m) x 6,00 m

Armament:
12 - 5,12" / 130 mm guns (6x2 guns), 67,03lbs / 30,40kg shells, 1938 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships, 4 raised mounts - superfiring
48 - 1,57" / 40,0 mm guns (12x4 guns), 1,95lbs / 0,88kg shells, 1938 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 898 lbs / 407 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3,15" / 80 mm 492,13 ft / 150,00 m 13,12 ft / 4,00 m
Ends: Unarmoured
Upper: 1,77" / 45 mm 492,13 ft / 150,00 m 8,01 ft / 2,44 m
Main Belt covers 105 % of normal length

- Torpedo Bulkhead and Bulges:
0,79" / 20 mm 656,17 ft / 200,00 m 18,08 ft / 5,51 m

- Armour deck: 2,36" / 60 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 101 425 shp / 75 663 Kw = 30,00 kts
Range 6 500nm at 15,00 kts
Bunker at max displacement = 2 515 tons

Complement:
990 - 1 288

Cost:
£7,247 million / $28,987 million

Distribution of weights at normal displacement:
Armament: 112 tons, 0,5 %
Armour: 3 764 tons, 15,1 %
- Belts: 1 163 tons, 4,7 %
- Torpedo bulkhead: 346 tons, 1,4 %
- Armament: 0 tons, 0,0 %
- Armour Deck: 2 256 tons, 9,1 %
- Conning Tower: 0 tons, 0,0 %
Machinery: 2 777 tons, 11,2 %
Hull, fittings & equipment: 9 277 tons, 37,2 %
Fuel, ammunition & stores: 1 975 tons, 7,9 %
Miscellaneous weights: 7 000 tons, 28,1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
49 466 lbs / 22 438 Kg = 737,9 x 5,1 " / 130 mm shells or 7,8 torpedoes
Stability (Unstable if below 1.00): 1,06
Metacentric height 5,5 ft / 1,7 m
Roll period: 20,0 seconds
Steadiness - As gun platform (Average = 50 %): 100 %
- Recoil effect (Restricted arc if above 1.00): 0,07
Seaboat quality (Average = 1.00): 1,41

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0,550
Length to Beam Ratio: 6,47 : 1
'Natural speed' for length: 31,62 kts
Power going to wave formation at top speed: 53 %
Trim (Max stability = 0, Max steadiness = 100): 71
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 %): 29,53 ft / 9,00 m
- Mid (50 %): 29,53 ft / 9,00 m
- Quarterdeck (15 %): 29,53 ft / 9,00 m
- Stern: 29,53 ft / 9,00 m
- Average freeboard: 29,79 ft / 9,08 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 89,1 %
- Above water (accommodation/working, high = better): 293,2 %
Waterplane Area: 51 617 Square feet or 4 795 Square metres
Displacement factor (Displacement / loading): 145 %
Structure weight / hull surface area: 127 lbs/sq ft or 622 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,95
- Longitudinal: 1,48
- Overall: 1,00
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

13

Saturday, November 1st 2008, 1:45am

And a Heavy

Simorgh3, Persia CV laid down 1938

Displacement:
35 877 t light; 36 776 t standard; 39 246 t normal; 41 221 t full load

Dimensions: Length overall / water x beam x draught
853,02 ft / 853,02 ft x 98,43 ft (Bulges 111,55 ft) x 26,25 ft (normal load)
260,00 m / 260,00 m x 30,00 m (Bulges 34,00 m) x 8,00 m

Armament:
16 - 5,12" / 130 mm guns (8x2 guns), 67,03lbs / 30,40kg shells, 1938 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships, 4 raised mounts - superfiring
96 - 1,57" / 40,0 mm guns (24x4 guns), 1,95lbs / 0,88kg shells, 1938 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 1 260 lbs / 571 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3,94" / 100 mm 524,93 ft / 160,00 m 13,12 ft / 4,00 m
Ends: Unarmoured
Upper: 2,17" / 55 mm 524,93 ft / 160,00 m 8,01 ft / 2,44 m
Main Belt covers 95 % of normal length

- Torpedo Bulkhead and Bulges:
0,79" / 20 mm 656,17 ft / 200,00 m 18,08 ft / 5,51 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2,36" / 60 mm 2,36" / 60 mm 2,36" / 60 mm
2nd: 1,18" / 30 mm - -

- Armour deck: 3,94" / 100 mm, Conning tower: 7,87" / 200 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 158 832 shp / 118 489 Kw = 32,00 kts
Range 9 000nm at 15,00 kts
Bunker at max displacement = 4 445 tons

Complement:
1 393 - 1 812

Cost:
£11,255 million / $45,020 million

Distribution of weights at normal displacement:
Armament: 158 tons, 0,4 %
Armour: 6 695 tons, 17,1 %
- Belts: 1 546 tons, 3,9 %
- Torpedo bulkhead: 346 tons, 0,9 %
- Armament: 165 tons, 0,4 %
- Armour Deck: 4 443 tons, 11,3 %
- Conning Tower: 196 tons, 0,5 %
Machinery: 4 349 tons, 11,1 %
Hull, fittings & equipment: 12 675 tons, 32,3 %
Fuel, ammunition & stores: 3 369 tons, 8,6 %
Miscellaneous weights: 12 000 tons, 30,6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
64 610 lbs / 29 307 Kg = 963,8 x 5,1 " / 130 mm shells or 8,3 torpedoes
Stability (Unstable if below 1.00): 1,08
Metacentric height 5,7 ft / 1,7 m
Roll period: 19,6 seconds
Steadiness - As gun platform (Average = 50 %): 80 %
- Recoil effect (Restricted arc if above 1.00): 0,06
Seaboat quality (Average = 1.00): 1,46

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0,550
Length to Beam Ratio: 7,65 : 1
'Natural speed' for length: 33,87 kts
Power going to wave formation at top speed: 51 %
Trim (Max stability = 0, Max steadiness = 100): 55
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 %): 29,53 ft / 9,00 m
- Mid (50 %): 29,53 ft / 9,00 m
- Quarterdeck (15 %): 29,53 ft / 9,00 m
- Stern: 29,53 ft / 9,00 m
- Average freeboard: 29,79 ft / 9,08 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 91,7 %
- Above water (accommodation/working, high = better): 246,3 %
Waterplane Area: 61 002 Square feet or 5 667 Square metres
Displacement factor (Displacement / loading): 137 %
Structure weight / hull surface area: 140 lbs/sq ft or 685 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,99
- Longitudinal: 1,17
- Overall: 1,00
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" (Nov 1st 2008, 1:47am)


14

Saturday, November 1st 2008, 2:10am

Is one of these vessels actually intended for construction, or are they just design studies?

15

Saturday, November 1st 2008, 2:29am

Does it matter?

They are studies for now

16

Saturday, November 1st 2008, 2:44am

Quoted

Originally posted by Vukovlad
Does it matter?

They are studies for now


A simple "they are studies for now" would have sufficed.

17

Saturday, November 1st 2008, 10:59am

While I'm still baffled as to why Persia needs a carrier it seems like this carrier will be an escort to the Indo-Persian amphibious group with a large enough air group for both CAP and strike missions.

If this is so an armoured flight deck might be a small hinderance but operating inside the Persian Gulf it is a neccesity. In WW the RN have shunned the armour deck for weight, hence cost, reasons and the realisation that a bigger air group is required. HMS Eagle is about the biggest the RN is willing to build. I'm not ready for Midway clones yet.

One question, why do these ships have bulges? Surely internal TB would suffice?

18

Saturday, November 1st 2008, 11:31am

As i said first try, why would internal TB be better?

19

Saturday, November 1st 2008, 2:20pm

The bulges help its true, and they give extra bouyancy and stability but they also produce drag and so you need more engine power for that 32 knots speed so are building a ship bigger than you have to. You have enough beam for a reasonably effective layered torpedo bulkhead system.

20

Saturday, November 1st 2008, 2:29pm

Less armor and internal torpedo protection

Simorgh4, Persia CV laid down 1938

Displacement:
31 539 t light; 32 346 t standard; 34 629 t normal; 36 454 t full load

Dimensions: Length overall / water x beam x draught
853,02 ft / 853,02 ft x 98,43 ft x 26,25 ft (normal load)
260,00 m / 260,00 m x 30,00 m x 8,00 m

Armament:
16 - 5,12" / 130 mm guns (8x2 guns), 67,03lbs / 30,40kg shells, 1938 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships, 4 raised mounts - superfiring
96 - 1,57" / 40,0 mm guns (24x4 guns), 1,95lbs / 0,88kg shells, 1938 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 1 260 lbs / 571 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3,54" / 90 mm 524,93 ft / 160,00 m 13,12 ft / 4,00 m
Ends: Unarmoured
Upper: 2,17" / 55 mm 524,93 ft / 160,00 m 8,01 ft / 2,44 m
Main Belt covers 95 % of normal length

- Torpedo Bulkhead:
0,79" / 20 mm 656,17 ft / 200,00 m 18,08 ft / 5,51 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2,36" / 60 mm 2,36" / 60 mm 2,36" / 60 mm
2nd: 1,18" / 30 mm - -

- Armour deck: 3,35" / 85 mm, Conning tower: 7,87" / 200 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 145 853 shp / 108 806 Kw = 32,00 kts
Range 9 000nm at 15,00 kts
Bunker at max displacement = 4 108 tons

Complement:
1 269 - 1 650

Cost:
£10,119 million / $40,476 million

Distribution of weights at normal displacement:
Armament: 158 tons, 0,5 %
Armour: 5 897 tons, 17,0 %
- Belts: 1 430 tons, 4,1 %
- Torpedo bulkhead: 346 tons, 1,0 %
- Armament: 165 tons, 0,5 %
- Armour Deck: 3 777 tons, 10,9 %
- Conning Tower: 180 tons, 0,5 %
Machinery: 3 994 tons, 11,5 %
Hull, fittings & equipment: 11 490 tons, 33,2 %
Fuel, ammunition & stores: 3 090 tons, 8,9 %
Miscellaneous weights: 10 000 tons, 28,9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
60 528 lbs / 27 455 Kg = 902,9 x 5,1 " / 130 mm shells or 7,2 torpedoes
Stability (Unstable if below 1.00): 1,06
Metacentric height 5,5 ft / 1,7 m
Roll period: 17,6 seconds
Steadiness - As gun platform (Average = 50 %): 80 %
- Recoil effect (Restricted arc if above 1.00): 0,09
Seaboat quality (Average = 1.00): 1,59

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0,550
Length to Beam Ratio: 8,67 : 1
'Natural speed' for length: 33,52 kts
Power going to wave formation at top speed: 50 %
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: 32,81 ft / 10,00 m
- Forecastle (20 %): 29,53 ft / 9,00 m
- Mid (50 %): 29,53 ft / 9,00 m
- Quarterdeck (15 %): 29,53 ft / 9,00 m
- Stern: 29,53 ft / 9,00 m
- Average freeboard: 29,79 ft / 9,08 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 91,8 %
- Above water (accommodation/working, high = better): 270,4 %
Waterplane Area: 61 002 Square feet or 5 667 Square metres
Displacement factor (Displacement / loading): 138 %
Structure weight / hull surface area: 131 lbs/sq ft or 641 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,98
- Longitudinal: 1,20
- Overall: 1,00
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
Excellent seaboat, comfortable, can fire her guns in the heaviest weather