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1

Thursday, February 8th 2007, 1:00pm

New French ship for 1934

The Strasbourg class battlecruiser is a smaller implementation of the Paris concept. Two will be laid down.

Strasbourg
Dunkirque

Strasbourg, French Battlecruiser laid down 1934

Displacement:
26,990 t light; 28,441 t standard; 32,230 t normal; 35,262 t full load

Dimensions: Length overall / water x beam x draught
721.51 ft / 711.94 ft x 78.74 ft (Bulges 95.14 ft) x 30.84 ft (normal load)
219.92 m / 217.00 m x 24.00 m (Bulges 29.00 m) x 9.40 m

Armament:
6 - 13.39" / 340 mm guns (2x3 guns), 1,322.77lbs / 600.00kg shells, 1934 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
6 - 9.45" / 240 mm guns (2x3 guns), 551.16lbs / 250.00kg shells, 1934 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, all raised mounts
12 - 4.72" / 120 mm guns (6x2 guns), 61.73lbs / 28.00kg shells, 1934 Model
Dual purpose guns in deck mounts with hoists
on side, evenly spread, 2 raised mounts
32 - 1.57" / 40.0 mm guns (8x4 guns), 1.95lbs / 0.88kg shells, 1934 Model
Anti-aircraft guns in deck mounts with hoists
on side, evenly spread, 4 raised mounts
8 - 1.57" / 40.0 mm guns (2x4 guns), 1.95lbs / 0.88kg shells, 1934 Model
Anti-aircraft guns in deck mounts with hoists
on centreline ends, evenly spread, all raised mounts
Weight of broadside 12,062 lbs / 5,471 kg
Shells per gun, main battery: 115

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 7.09" / 180 mm 429.79 ft / 131.00 m 13.12 ft / 4.00 m
Ends: 1.18" / 30 mm 282.15 ft / 86.00 m 9.84 ft / 3.00 m
Main Belt covers 93 % of normal length

- Torpedo Bulkhead and Bulges:
1.57" / 40 mm 429.79 ft / 131.00 m 32.32 ft / 9.85 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 10.6" / 270 mm 6.69" / 170 mm 8.66" / 220 mm
2nd: 10.6" / 270 mm 6.69" / 170 mm 8.66" / 220 mm
3rd: 0.98" / 25 mm 0.20" / 5 mm -
4th: 0.98" / 25 mm 0.20" / 5 mm -
5th: 0.98" / 25 mm 0.20" / 5 mm -

- Armour deck: 4.72" / 120 mm, Conning tower: 10.04" / 255 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 128,581 shp / 95,921 Kw = 31.00 kts
Range 10,850nm at 18.00 kts
Bunker at max displacement = 6,821 tons

Complement:
1,202 - 1,563

Cost:
£12.560 million / $50.238 million

Distribution of weights at normal displacement:
Armament: 1,305 tons, 4.0 %
Armour: 8,643 tons, 26.8 %
- Belts: 1,824 tons, 5.7 %
- Torpedo bulkhead: 809 tons, 2.5 %
- Armament: 2,264 tons, 7.0 %
- Armour Deck: 3,526 tons, 10.9 %
- Conning Tower: 219 tons, 0.7 %
Machinery: 3,699 tons, 11.5 %
Hull, fittings & equipment: 13,269 tons, 41.2 %
Fuel, ammunition & stores: 5,240 tons, 16.3 %
Miscellaneous weights: 75 tons, 0.2 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
46,299 lbs / 21,001 Kg = 38.6 x 13.4 " / 340 mm shells or 7.1 torpedoes
Stability (Unstable if below 1.00): 1.06
Metacentric height 3.9 ft / 1.2 m
Roll period: 20.2 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.89
Seaboat quality (Average = 1.00): 1.30

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.540
Length to Beam Ratio: 7.48 : 1
'Natural speed' for length: 31.04 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 54
Bow angle (Positive = bow angles forward): 14.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 38.39 ft / 11.70 m
- Forecastle (25 %): 28.22 ft / 8.60 m
- Mid (50 %): 26.25 ft / 8.00 m
- Quarterdeck (15 %): 25.26 ft / 7.70 m
- Stern: 26.25 ft / 8.00 m
- Average freeboard: 27.76 ft / 8.46 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 92.8 %
- Above water (accommodation/working, high = better): 168.6 %
Waterplane Area: 40,342 Square feet or 3,748 Square metres
Displacement factor (Displacement / loading): 121 %
Structure weight / hull surface area: 190 lbs/sq ft or 930 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 1.98
- 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

Main belt sloped @ 15 deg

Surface search radar - 20 tons
Air search radar - 20 tons
Misc - 35 tons

This post has been edited 1 times, last edit by "AdmKuznetsov" (Feb 8th 2007, 1:02pm)


HoOmAn

Keeper of the Sacred Block Coefficient

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2

Thursday, February 8th 2007, 2:05pm

Seems to be a step back into times were capital ships had different main gun calibers - pre-DREADNOUGH, that is.

Could you please explain the logic behind your design and what you think those different calibers would do to your ships FC.

3

Thursday, February 8th 2007, 2:16pm

I'm rather puzzled as well. I can see a smaller version of the Richeliu design, built around a 305mm-330mm main battery, but this ship seems underarmored (except on the deck) for her size and, IMO, the main and secondary batteries are both at the bare minimum number of tubes.

4

Thursday, February 8th 2007, 2:19pm

We went over all this in 1931...

When I introduced the original Paris class battlecruiser design. The concept is to be able to simultaneously engage multiple targets, destroying one with the 340mm battery while keeping the second occupied with the 240s.

Her belt armor is improved by the slope, and by the fact that the 40mm torpedo bulkhead extends up to the main armored deck.

This post has been edited 1 times, last edit by "AdmKuznetsov" (Feb 8th 2007, 2:21pm)


5

Thursday, February 8th 2007, 5:08pm

I guess you can go with that arrangement if you think you're more likely to be tackling two ships than one. I don't think the layout will be emulated elsewhere.

As it stands, you appear to have a triple 240 firing over a triple 340 at each end. It seems rather ineffectual if you end up chasing something or trying to escaping something. Have you contemplated concentrating one caliber forward and the other aft?

While the seakeeping is good, I think you'd benefit considerably by cutting the freeboard by a metre or more and beefing up the protection.

6

Thursday, February 8th 2007, 5:44pm

Quoted

I guess you can go with that arrangement if you think you're more likely to be tackling two ships than one. I don't think the layout will be emulated elsewhere.


The French strategic problem is different than most. Defending a global Empire with 6 capital ships means that I'll begin any big war outnumbered.

Quoted

As it stands, you appear to have a triple 240 firing over a triple 340 at each end. It seems rather ineffectual if you end up chasing something or trying to escaping something. Have you contemplated concentrating one caliber forward and the other aft?


Way back in the beginning of the Sim I posted a Springstyle of a 33 knot BC with 2x3 254mm forward, and a triple 254mm superfiring a triple 406mm aft. The forward armament was plenty for cruiser-killing, and the aft armament was for running away from BBs. It was a joke, and people did think it was pretty weird.

For chasing, concentrating the 340s forward would make them more effective. It would cost some tonnage, but not much.

And as for escaping things, well, they're better off than the historical Strasbourg was.

7

Friday, February 9th 2007, 5:09am

I have been looking at mixed armament ships for the very same reason for Mexico. To hit a ship you need at least 6 guns, to hit 2 you need 12. But 12 main guns are heavy and 12 light guns wont do much damage, so you split the battery using the main guns to destroy one ship, while using the light guns to cripple the other one.

8

Friday, February 9th 2007, 6:44am

Or cripple both, and let Santa Anna finish them off.

9

Friday, February 9th 2007, 7:13am

Then you have the Tylor which could almost engage three ships by that calculation, having 16 guns (instead of 18 to get 3 groups of 6), but engaging at least two targets was the plan of that vessel with a few extra turrets to allow some off side shooting if there is a third target opposite the first two. The likelihood of this happening is very remote, but it makes for an impressive, and yes outdated, warship.

HoOmAn

Keeper of the Sacred Block Coefficient

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10

Friday, February 9th 2007, 11:57am

Who said one needs 6 guns to hit a ship?

3 splashes are enough to say you´re short or long...

11

Friday, February 9th 2007, 12:01pm

Repair ship Dakar

This ship will be refitted to service ships in areas without repair facilities.

Dakar, French Repair Ship laid down 1930

Displacement:
12,121 t light; 12,423 t standard; 14,543 t normal; 16,239 t full load

Dimensions: Length overall / water x beam x draught
552.53 ft / 541.34 ft x 75.46 ft x 19.69 ft (normal load)
168.41 m / 165.00 m x 23.00 m x 6.00 m

Armament:
2 - 4.72" / 120 mm guns (1x2 guns), 52.72lbs / 23.92kg shells, 1934 Model
Dual purpose guns in a deck mount with hoist
on centreline aft
8 - 1.57" / 40.0 mm guns (2x4 guns), 1.95lbs / 0.89kg shells, 1934 Model
Anti-aircraft guns in deck mounts with hoists
on side, all amidships
Weight of broadside 121 lbs / 55 kg
Shells per gun, main battery: 150

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 -

- Conning tower: 1.18" / 30 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 13,215 shp / 9,858 Kw = 18.00 kts
Range 12,950nm at 15.00 kts
Bunker at max displacement = 3,816 tons

Complement:
132 - 172

Cost:
£2.062 million / $8.247 million

Distribution of weights at normal displacement:
Armament: 15 tons, 0.1 %
Armour: 20 tons, 0.1 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 5 tons, 0.0 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 15 tons, 0.1 %
Machinery: 400 tons, 2.8 %
Hull, fittings & equipment: 3,686 tons, 25.3 %
Fuel, ammunition & stores: 2,422 tons, 16.7 %
Miscellaneous weights: 8,000 tons, 55.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
21,261 lbs / 9,644 Kg = 403.2 x 4.7 " / 120 mm shells or 2.9 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 3.9 ft / 1.2 m
Roll period: 16.0 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0.01
Seaboat quality (Average = 1.00): 1.63

Hull form characteristics:
Hull has raised forecastle
Block coefficient: 0.633
Length to Beam Ratio: 7.17 : 1
'Natural speed' for length: 23.27 kts
Power going to wave formation at top speed: 36 %
Trim (Max stability = 0, Max steadiness = 100): 31
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 6.56 ft / 2.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 26.25 ft / 8.00 m
- Forecastle (20 %): 22.97 ft / 7.00 m (15.75 ft / 4.80 m aft of break)
- Mid (50 %): 15.75 ft / 4.80 m
- Quarterdeck (15 %): 16.40 ft / 5.00 m
- Stern: 18.04 ft / 5.50 m
- Average freeboard: 17.79 ft / 5.42 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 70.2 %
- Above water (accommodation/working, high = better): 141.4 %
Waterplane Area: 30,807 Square feet or 2,862 Square metres
Displacement factor (Displacement / loading): 163 %
Structure weight / hull surface area: 88 lbs/sq ft or 429 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.03
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

This post has been edited 1 times, last edit by "AdmKuznetsov" (Feb 9th 2007, 12:02pm)


12

Monday, February 26th 2007, 12:51pm

Partial reconstruction of MN France and MN Republique

The French naval staff have long been concerned about the poor stability of the two France class battleships. To correct this, the class will undergo a partial reconstruction in 1934-35. They will recieve bulges, new engines, a new bow, a taller torpedo bulkhead, and additional electronic gear. As a result of the bulges, their draft is reduced by 10cm, and there is a corresponding increase in freeboard. They are expected to enjoy substantially increased survivability as a result.

France class, French battleship laid down 1924 (Engine 1934)

Displacement:
38,497 t light; 41,011 t standard; 47,710 t normal; 53,068 t full load

Dimensions: Length overall / water x beam x draught
776.24 ft / 767.72 ft x 108.92 ft (Bulges 122.05 ft) x 31.82 ft (normal load)
236.60 m / 234.00 m x 33.20 m (Bulges 37.20 m) x 9.70 m

Armament:
12 - 15.00" / 381 mm guns (4x3 guns), 2,039.28lbs / 925.00kg shells, 1924 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
12 - 4.72" / 120 mm guns (6x2 guns), 61.73lbs / 28.00kg shells, 1924 Model
Breech loading guns in deck mounts with hoists
on side, evenly spread, 2 raised mounts
48 - 1.57" / 40.0 mm guns (12x4 guns), 1.95lbs / 0.88kg shells, 1924 Model
Anti-aircraft guns in deck mounts with hoists
on side, evenly spread
Weight of broadside 25,306 lbs / 11,478 kg
Shells per gun, main battery: 110

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 14.2" / 360 mm 438.16 ft / 133.55 m 11.81 ft / 3.60 m
Ends: Unarmoured
Main Belt covers 88 % of normal length

- Torpedo Bulkhead and Bulges:
1.18" / 30 mm 438.16 ft / 133.55 m 28.87 ft / 8.80 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 15.7" / 400 mm 7.87" / 200 mm 11.8" / 300 mm
2nd: 0.98" / 25 mm 0.20" / 5 mm -
3rd: 0.98" / 25 mm 0.20" / 5 mm -

- Armour deck: 5.51" / 140 mm, Conning tower: 15.75" / 400 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 111,921 shp / 83,493 Kw = 27.00 kts
Range 14,000nm at 18.00 kts
Bunker at max displacement = 12,057 tons

Complement:
1,613 - 2,098

Cost:
£12.366 million / $49.463 million

Distribution of weights at normal displacement:
Armament: 2,622 tons, 5.5 %
Armour: 13,708 tons, 28.7 %
- Belts: 3,258 tons, 6.8 %
- Torpedo bulkhead: 553 tons, 1.2 %
- Armament: 3,444 tons, 7.2 %
- Armour Deck: 6,007 tons, 12.6 %
- Conning Tower: 446 tons, 0.9 %
Machinery: 3,220 tons, 6.7 %
Hull, fittings & equipment: 18,782 tons, 39.4 %
Fuel, ammunition & stores: 9,212 tons, 19.3 %
Miscellaneous weights: 165 tons, 0.3 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
64,875 lbs / 29,427 Kg = 38.4 x 15.0 " / 381 mm shells or 10.7 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 6.9 ft / 2.1 m
Roll period: 19.6 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.56
Seaboat quality (Average = 1.00): 1.07

Hull form characteristics:
Hull has low quarterdeck
Block coefficient: 0.560
Length to Beam Ratio: 6.29 : 1
'Natural speed' for length: 27.71 kts
Power going to wave formation at top speed: 49 %
Trim (Max stability = 0, Max steadiness = 100): 65
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 31.82 ft / 9.70 m
- Forecastle (21 %): 21.00 ft / 6.40 m
- Mid (80 %): 18.04 ft / 5.50 m
- Quarterdeck (20 %): 13.45 ft / 4.10 m (18.04 ft / 5.50 m before break)
- Stern: 13.45 ft / 4.10 m
- Average freeboard: 19.53 ft / 5.95 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 79.5 %
- Above water (accommodation/working, high = better): 135.8 %
Waterplane Area: 58,909 Square feet or 5,473 Square metres
Displacement factor (Displacement / loading): 116 %
Structure weight / hull surface area: 230 lbs/sq ft or 1,123 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.98
- Longitudinal: 1.19
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform

Air search radar - 20 tons
Surface search radar - 20 tons

MN France: Fleet Command Bridge

Mn Republique: 4 Seaplanes, 2 Catapults

13

Monday, February 26th 2007, 1:57pm

No AAA heavier than 40mm? Isn't that a little risky by this point? Seems to me a battery of 90mm or 100mm guns might be a good addition.....

14

Monday, February 26th 2007, 2:44pm

Good point

I'll replace the 120mm breech loaders with DP mounts. It'll fit in a partial reconstruction.

15

Monday, February 26th 2007, 3:18pm

For the repair ship, what sort of tasks do you forsee her being able to do?

16

Monday, February 26th 2007, 7:32pm

repair ship tasking

What the repair ship brings is:

Carries 5000 tons or so of warship materials to undeveloped locations.

Performs "T" type tasks fully effectively.

Brings underwater welding capability to temporarily patch battle damage to hulls to stop flooding, so that damaged ships can get to a drydock for permanent repair. Structural damage will not be repaired, and temporary repairs will not count towards final damage repair cost.