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1

Tuesday, June 4th 2013, 11:35pm

French Warships for 1944

Well, here's the first project I have to post - and oddly, the one that I designed this afternoon. I've finally decided that I need to rebuild the Emile Bertin class light cruisers - a task I've been considering for several years now, but never made time for.

I made the potentially controversial decision to "downgun" the ships to the new (1943) 130mm DP gun. The faster-firing Franco-Russian gun shoots so much faster than the 152mm/L55 gun, even at its lowest sustainable rate of fire, that firepower is still increased. The 100mm secondary guns, which to the best of my knowledge were not dual-purpose, were similarly replaced with modern "Cinquante-sept soixante" (57mm) AA guns. Finally, the engines are replaced, and extra weight is added for electronics.

I am considering the possibility that the original floatplane included in the design may be replaced with a single helicopter landing on the aft deck. Since I'm still undecided, I continued to apply weight as per my formula for floatplanes.

Quoted

[SIZE=3]Emile Bertin-class, French Light Cruiser laid down 1928 (Rebuilt 1944)[/SIZE]

Displacement:
5,700 t light; 6,024 t standard; 7,061 t normal; 7,891 t full load

Dimensions: Length overall / water x beam x draught
593.53 ft / 570.87 ft x 53.48 ft (Bulges 57.09 ft) x 18.04 ft (normal load)
180.91 m / 174.00 m x 16.30 m (Bulges 17.40 m) x 5.50 m

Armament:
8 - 5.12" / 130 mm guns (4x2 guns), 79.37lbs / 36.00kg shells, 1944 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
4 - 2.24" / 57.0 mm guns (2x2 guns), 6.61lbs / 3.00kg shells, 1944 Model
Automatic rapid fire guns in deck mounts with hoists
on centreline, evenly spread, all raised mounts
4 - 2.24" / 57.0 mm guns (2x2 guns), 6.61lbs / 3.00kg shells, 1944 Model
Automatic rapid fire guns in deck mounts with hoists
on side, evenly spread
24 - 0.91" / 23.0 mm guns (12x2 guns), 0.37lbs / 0.17kg shells, 1944 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 697 lbs / 316 kg
Shells per gun, main battery: 450
16 - 21.7" / 550 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2.95" / 75 mm 448.16 ft / 136.60 m 9.19 ft / 2.80 m
Ends: Unarmoured
Main Belt covers 121 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.18" / 30 mm 0.79" / 20 mm 0.79" / 20 mm
2nd: 0.59" / 15 mm 0.20" / 5 mm 0.20" / 5 mm
3rd: 0.59" / 15 mm 0.20" / 5 mm 0.20" / 5 mm
4th: 0.39" / 10 mm 0.20" / 5 mm -

- Armour deck: 0.79" / 20 mm, Conning tower: 3.15" / 80 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 72,851 shp / 54,347 Kw = 34.00 kts
Range 8,000nm at 18.00 kts
Bunker at max displacement = 1,867 tons

Complement:
384 - 500

Cost:
£1.996 million / $7.986 million

Distribution of weights at normal displacement:
Armament: 75 tons, 1.1 %
Armour: 832 tons, 11.8 %
- Belts: 488 tons, 6.9 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 32 tons, 0.4 %
- Armour Deck: 288 tons, 4.1 %
- Conning Tower: 25 tons, 0.4 %
Machinery: 1,860 tons, 26.3 %
Hull, fittings & equipment: 2,742 tons, 38.8 %
Fuel, ammunition & stores: 1,361 tons, 19.3 %
Miscellaneous weights: 190 tons, 2.7 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
8,784 lbs / 3,984 Kg = 131.0 x 5.1 " / 130 mm shells or 1.4 torpedoes
Stability (Unstable if below 1.00): 1.22
Metacentric height 2.8 ft / 0.9 m
Roll period: 14.3 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.22
Seaboat quality (Average = 1.00): 1.08

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.420
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 27.55 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 65
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 6.56 ft / 2.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 27.89 ft / 8.50 m
- Forecastle (22 %): 24.36 ft / 7.43 m
- Mid (44 %): 20.83 ft / 6.35 m (13.12 ft / 4.00 m aft of break)
- Quarterdeck (15 %): 12.96 ft / 3.95 m
- Stern: 12.96 ft / 3.95 m
- Average freeboard: 17.93 ft / 5.47 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 99.1 %
- Above water (accommodation/working, high = better): 98.9 %
Waterplane Area: 19,762 Square feet or 1,836 Square metres
Displacement factor (Displacement / loading): 132 %
Structure weight / hull surface area: 86 lbs/sq ft or 419 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.94
- Longitudinal: 1.27
- Overall: 0.97
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform

Breakdown of Miscellaneous Weights:
- 45 tons for electronics
- 45 tons for sixteen 42G torpedo reloads
- 15 tons for HVAC
- 25 tons for seaplane
- 15 tons for catapult
- 45 tons remaining for crew comforts and growth
190 tons total miscellaneous weight

2

Tuesday, June 4th 2013, 11:41pm

Given the general trend in ship design, I think you are wise to down-gun the ships with a modern dual purpose battery. They are on the small side for a surface battle against larger light cruisers, but if mixed with destroyers would be well matched. I like the electronics too. Even with a 50% refit, I think that they're worth it.

3

Wednesday, June 19th 2013, 6:10am

Here's another pair of refits that I'm considering. The French have retired the old Seine class corvettes, but the follow-on Meuse class ships, and the lighter Emilia class, both remain in service. Lacking détecteur électro-magnétique equipment / radar, they are due for an update. Due to their size, the extent of their new equipment will be limited, and balanced out by the removal of some of their armament.

For the Meuse, I elected to remove all three of the 1925-dated 100mm deck guns. The forward mounting is replaced with a modern dual-purpose 100mm gun, and the aft mounting is replaced with a single 57mm automatic gun, the same gun being installed on naval auxiliaries. It's a bit of a loss of firepower, but I think it's still sufficient to kill submarines and MTBs; 3x100mm wouldn't have been enough to take on an enemy destroyer anyway. Radar - a very light set - is added, as is new sonar. I've considered the possibility of scrapping five of the ten ships to fund the reconstruction of the other five ships. No decision yet.

And now for the Emilias. These boats are even smaller (and with one 120mm and one 75mm gun, extremely heavily armed for their size). I decided to sacrifice both the mongo 120mm gun and the 75mm gun, and instead install two 57mm single mounts. I'm not terribly concerned about the light firepower since 57mm is still more than capable of shooting up bancas, junks, dhows, submarines, and MTBs. Again, install radar, update sonar. I'm probably going to take one or two of the boats a step farther and re-engine them as a testbed for marine diesels or stuff, but otherwise the specs won't change at all.

Quoted

[SIZE=3]Meuse-class, French Corvette laid down 1925[/SIZE]

Displacement:
531 t light; 554 t standard; 625 t normal; 681 t full load

Dimensions: Length overall / water x beam x draught
229.66 ft / 229.66 ft x 21.98 ft x 10.83 ft (normal load)
70.00 m / 70.00 m x 6.70 m x 3.30 m

Armament:
1 - 3.94" / 100 mm guns in single mounts, 35.27lbs / 16.00kg shells, 1944 Model
Dual purpose gun in deck mount
on centreline forward
1 - 2.24" / 57.0 mm guns in single mounts, 6.61lbs / 3.00kg shells, 1944 Model
Dual purpose gun in deck mount
on centreline aft
4 - 0.91" / 23.0 mm guns in single mounts, 0.37lbs / 0.17kg shells, 1944 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 43 lbs / 20 kg
Shells per gun, main battery: 400
4 - 21.7" / 550 mm above water torpedoes

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

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 14,354 shp / 10,708 Kw = 30.00 kts
Range 4,700nm at 12.00 kts
Bunker at max displacement = 126 tons

Complement:
62 - 81

Cost:
£0.214 million / $0.857 million

Distribution of weights at normal displacement:
Armament: 5 tons, 0.8 %
Armour: 3 tons, 0.5 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 3 tons, 0.5 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 307 tons, 49.1 %
Hull, fittings & equipment: 182 tons, 29.1 %
Fuel, ammunition & stores: 93 tons, 14.9 %
Miscellaneous weights: 35 tons, 5.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
185 lbs / 84 Kg = 6.1 x 3.9 " / 100 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.15
Metacentric height 0.7 ft / 0.2 m
Roll period: 11.3 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.15
Seaboat quality (Average = 1.00): 1.00

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.400
Length to Beam Ratio: 10.45 : 1
'Natural speed' for length: 17.47 kts
Power going to wave formation at top speed: 70 %
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: 11.48 ft / 3.50 m
- Forecastle (20 %): 11.48 ft / 3.50 m
- Mid (50 %): 11.32 ft / 3.45 m
- Quarterdeck (15 %): 11.32 ft / 3.45 m
- Stern: 11.32 ft / 3.45 m
- Average freeboard: 11.38 ft / 3.47 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 171.7 %
- Above water (accommodation/working, high = better): 47.2 %
Waterplane Area: 3,225 Square feet or 300 Square metres
Displacement factor (Displacement / loading): 62 %
Structure weight / hull surface area: 23 lbs/sq ft or 113 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 3.81
- Overall: 0.61
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is extremely poor

Notes
80 tons apiece to refit


Quoted

[SIZE=3]Emilia-class, French Patrol Boat laid down 1928[/SIZE]

Displacement:
376 t light; 400 t standard; 420 t normal; 437 t full load

Dimensions: Length overall / water x beam x draught
214.02 ft / 203.41 ft x 26.25 ft x 6.56 ft (normal load)
65.23 m / 62.00 m x 8.00 m x 2.00 m

Armament:
2 - 2.24" / 57.0 mm guns in single mounts, 6.61lbs / 3.00kg shells, 1944 Model
Dual purpose guns in deck mounts
on centreline ends, evenly spread
4 - 1.57" / 40.0 mm guns (2x2 guns), 1.95lbs / 0.89kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
4 - 0.91" / 23.0 mm guns in single mounts, 0.37lbs / 0.17kg shells, 1944 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 23 lbs / 10 kg
Shells per gun, main battery: 1,000
2 - 21.7" / 550 mm above water torpedoes

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.20" / 5 mm -
2nd: 0.98" / 25 mm 0.20" / 5 mm -
3rd: 0.98" / 25 mm - -

- Conning tower: 0.98" / 25 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 7,854 shp / 5,859 Kw = 27.00 kts
Range 2,600nm at 10.00 kts
Bunker at max displacement = 36 tons

Complement:
46 - 60

Cost:
£0.162 million / $0.647 million

Distribution of weights at normal displacement:
Armament: 3 tons, 0.6 %
Armour: 5 tons, 1.1 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 3 tons, 0.8 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 1 tons, 0.3 %
Machinery: 193 tons, 46.0 %
Hull, fittings & equipment: 140 tons, 33.3 %
Fuel, ammunition & stores: 45 tons, 10.7 %
Miscellaneous weights: 35 tons, 8.3 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
171 lbs / 77 Kg = 30.2 x 2.2 " / 57 mm shells or 0.2 torpedoes
Stability (Unstable if below 1.00): 1.07
Metacentric height 0.8 ft / 0.2 m
Roll period: 12.6 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.06
Seaboat quality (Average = 1.00): 0.91

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.420
Length to Beam Ratio: 7.75 : 1
'Natural speed' for length: 16.82 kts
Power going to wave formation at top speed: 72 %
Trim (Max stability = 0, Max steadiness = 100): 77
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 18.37 ft / 5.60 m
- Forecastle (20 %): 13.94 ft / 4.25 m
- Mid (50 %): 10.50 ft / 3.20 m
- Quarterdeck (15 %): 10.50 ft / 3.20 m
- Stern: 10.50 ft / 3.20 m
- Average freeboard: 12.06 ft / 3.68 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 166.0 %
- Above water (accommodation/working, high = better): 117.2 %
Waterplane Area: 3,455 Square feet or 321 Square metres
Displacement factor (Displacement / loading): 77 %
Structure weight / hull surface area: 21 lbs/sq ft or 104 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.48
- Longitudinal: 3.68
- Overall: 0.59
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

Notes
56 tons apiece to refit
94 tons to re-engine

4

Wednesday, June 19th 2013, 7:27am

These small craft are designed to be used alongside the minesweepers of the fleet; they assist in towing minesweeping gear. The fleet minesweepers serve as their motherships in most situations.

Quoted

[SIZE=3]Dragueur de mines 17.4m-class Light Minesweeper[/SIZE]
Displacement: 30 tonnes (light), 38 tonnes (normal)
Length: 17.4 m (57 ft) overall
Beam: 4.9 m (16 ft)
Draught: 1.3 m (4.33 ft) full load
Machinery: 2 Renault marine diesel engines, both of 342hp; two shafts
Speed: 12 knots (full load)
Cruising range: 380nm at 12 knots
Crew: 6 men
Armament:
- 1 x 15mm machine gun

HoOmAn

Keeper of the Sacred Block Coefficient

  • Send private message

5

Wednesday, June 19th 2013, 8:57am

Hi,

I think you need to check your Emile Bertin class rebuild. Her hull strength is too low for her size, or her size too large for her hull strength (see Gentlemn Rules).

6

Wednesday, June 19th 2013, 4:47pm

Harumph! That's why rebuilding these ships is so tricky. They were designed under the .75 hull strength rule and I already had to raise them to 0.9. The changes I made raised the standard displacement over what it was, and I didn't go back to check that.

No matter, I'll just add more range to lower the displacement. I had hull strength to use anyway, and it lowers my refit cost.

Quoted

[SIZE=3]Emile Bertin-class, French Light Cruiser laid down 1928 (Engine 1944)[/SIZE]

Displacement:
5,593 t light; 5,957 t standard; 7,057 t normal; 7,936 t full load

Dimensions: Length overall / water x beam x draught
593.53 ft / 570.87 ft x 53.48 ft (Bulges 57.09 ft) x 18.04 ft (normal load)
180.91 m / 174.00 m x 16.30 m (Bulges 17.40 m) x 5.50 m

Armament:
8 - 5.12" / 130 mm guns (4x2 guns), 79.37lbs / 36.00kg shells, 1944 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
4 - 2.24" / 57.0 mm guns (2x2 guns), 6.61lbs / 3.00kg shells, 1944 Model
Automatic rapid fire guns in deck mounts with hoists
on centreline, evenly spread, all raised mounts
4 - 2.24" / 57.0 mm guns (2x2 guns), 6.61lbs / 3.00kg shells, 1944 Model
Automatic rapid fire guns in deck mounts with hoists
on side, evenly spread
24 - 0.91" / 23.0 mm guns (12x2 guns), 0.37lbs / 0.17kg shells, 1944 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 697 lbs / 316 kg
Shells per gun, main battery: 550
16 - 21.7" / 550 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2.95" / 75 mm 448.16 ft / 136.60 m 9.19 ft / 2.80 m
Ends: Unarmoured
Main Belt covers 121 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.18" / 30 mm 0.79" / 20 mm 0.79" / 20 mm
2nd: 0.59" / 15 mm 0.20" / 5 mm 0.20" / 5 mm
3rd: 0.59" / 15 mm 0.20" / 5 mm 0.20" / 5 mm
4th: 0.39" / 10 mm 0.20" / 5 mm -

- Armour deck: 0.79" / 20 mm, Conning tower: 3.15" / 80 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 72,812 shp / 54,318 Kw = 34.00 kts
Range 8,500nm at 18.00 kts
Bunker at max displacement = 1,979 tons

Complement:
384 - 500

Cost:
£1.982 million / $7.927 million

Distribution of weights at normal displacement:
Armament: 75 tons, 1.1 %
Armour: 834 tons, 11.8 %
- Belts: 488 tons, 6.9 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 33 tons, 0.5 %
- Armour Deck: 288 tons, 4.1 %
- Conning Tower: 25 tons, 0.4 %
Machinery: 1,859 tons, 26.3 %
Hull, fittings & equipment: 2,635 tons, 37.3 %
Fuel, ammunition & stores: 1,464 tons, 20.7 %
Miscellaneous weights: 190 tons, 2.7 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
8,442 lbs / 3,829 Kg = 125.9 x 5.1 " / 130 mm shells or 1.4 torpedoes
Stability (Unstable if below 1.00): 1.23
Metacentric height 2.9 ft / 0.9 m
Roll period: 14.2 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.21
Seaboat quality (Average = 1.00): 1.08

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.420
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 27.55 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 65
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 6.56 ft / 2.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 27.89 ft / 8.50 m
- Forecastle (22 %): 24.36 ft / 7.43 m
- Mid (44 %): 20.83 ft / 6.35 m (13.12 ft / 4.00 m aft of break)
- Quarterdeck (15 %): 12.96 ft / 3.95 m
- Stern: 12.96 ft / 3.95 m
- Average freeboard: 17.93 ft / 5.47 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 99.7 %
- Above water (accommodation/working, high = better): 98.9 %
Waterplane Area: 19,759 Square feet or 1,836 Square metres
Displacement factor (Displacement / loading): 132 %
Structure weight / hull surface area: 82 lbs/sq ft or 403 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.90
- Longitudinal: 1.22
- Overall: 0.93
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform

7

Wednesday, June 19th 2013, 11:16pm

Also on the books are two light fleet carriers to replace the older, lighter fleet carrier currently used (or more appropriately, used as aircraft transports and ASW carriers) by the Marine Nationale. These two proposed ships are built on the same hull as the Redoubtable-class heavy cruisers in order to maximize parts economy.

Quoted

[SIZE=3]Zélé-class, French Carrier laid down 1944[/SIZE]

Displacement:
14,550 t light; 15,063 t standard; 17,774 t normal; 19,944 t full load

Dimensions: Length overall / water x beam x draught
741.48 ft / 711.94 ft x 69.88 ft (Bulges 71.19 ft) x 23.79 ft (normal load)
226.00 m / 217.00 m x 21.30 m (Bulges 21.70 m) x 7.25 m

Armament:
8 - 3.94" / 100 mm guns (4x2 guns), 35.27lbs / 16.00kg shells, 1944 Model
Automatic rapid fire guns in deck mounts with hoists
on side, all amidships, all raised mounts - superfiring
16 - 2.24" / 57.0 mm guns (8x2 guns), 6.61lbs / 3.00kg shells, 1944 Model
Automatic rapid fire guns in deck mounts with hoists
on side, evenly spread, all raised mounts
36 - 0.79" / 20.0 mm guns (18x2 guns), 0.24lbs / 0.11kg shells, 1944 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 397 lbs / 180 kg
Shells per gun, main battery: 620

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1.18" / 30 mm 396.98 ft / 121.00 m 10.50 ft / 3.20 m
Ends: Unarmoured
Main Belt covers 86 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.39" / 10 mm 0.39" / 10 mm
2nd: 0.59" / 15 mm 0.20" / 5 mm 0.20" / 5 mm
3rd: 0.39" / 10 mm - -

- Armour deck: 2.36" / 60 mm, Conning tower: 5.91" / 150 mm

Machinery:
Oil fired boilers, steam turbines plus diesel motors,
Electric motors, 4 shafts, 125,513 shp / 93,633 Kw = 34.00 kts
Range 12,000nm at 18.00 kts
Bunker at max displacement = 4,881 tons

Complement:
769 - 1,000

Cost:
£6.734 million / $26.937 million

Distribution of weights at normal displacement:
Armament: 51 tons, 0.3 %
Armour: 1,846 tons, 10.4 %
- Belts: 210 tons, 1.2 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 21 tons, 0.1 %
- Armour Deck: 1,529 tons, 8.6 %
- Conning Tower: 87 tons, 0.5 %
Machinery: 3,205 tons, 18.0 %
Hull, fittings & equipment: 5,648 tons, 31.8 %
Fuel, ammunition & stores: 3,224 tons, 18.1 %
Miscellaneous weights: 3,800 tons, 21.4 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
23,893 lbs / 10,838 Kg = 783.1 x 3.9 " / 100 mm shells or 2.4 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 3.5 ft / 1.1 m
Roll period: 15.9 seconds
Steadiness - As gun platform (Average = 50 %): 58 %
- Recoil effect (Restricted arc if above 1.00): 0.07
Seaboat quality (Average = 1.00): 1.19

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.516
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 30.39 kts
Power going to wave formation at top speed: 55 %
Trim (Max stability = 0, Max steadiness = 100): 49
Bow angle (Positive = bow angles forward): 35.00 degrees
Stern overhang: 6.56 ft / 2.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 32.81 ft / 10.00 m
- Forecastle (25 %): 26.25 ft / 8.00 m
- Mid (50 %): 19.69 ft / 6.00 m
- Quarterdeck (15 %): 19.69 ft / 6.00 m
- Stern: 20.51 ft / 6.25 m
- Average freeboard: 22.86 ft / 6.97 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 85.3 %
- Above water (accommodation/working, high = better): 182.5 %
Waterplane Area: 34,994 Square feet or 3,251 Square metres
Displacement factor (Displacement / loading): 143 %
Structure weight / hull surface area: 103 lbs/sq ft or 504 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.15
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent

Breakdown of Miscellaneous Weights:
- 50 tons for crew comforts (air conditioning, movie theatre, and ice cream machine)
- 75 tons for Electronics Suite
- 20 tons for electronic fire-control on 100mm and 57mm guns
- 50 tons for communications
- 5 tons for forward Voith-Schneider maneuvering system
- 3,600 tons for 60x aircraft
Total extra weight: 3800 tons

Ships in Class:
- Zélé
- Héros