WesWorld

France intends to build 6 10,000 ton heavy cruisers over the course of the next decade. Here is the initial class of two, the Suffren class:

French Suffren class heavy cruisers, laid down 1921

Length, 190.0 m x Beam, 19.5 m x Depth, 6.6 m
11094 tonnes normal displacement (10106 tonnes standard)

Main battery: 8 x 20.0-cm (3 turrets; 1 superfiring)
Secondary battery: 12 x 10.0-cm
AA battery: 16 x 4.0-cm
Light battery: 6 x 1.3-cm

Weight of broadside: 1068 kg

8 TT, 53.0 cm in two quad mounts

Main belt, 10.0 cm; ends unarmored
Armor deck, average 2.0 cm
Conning tower, 10.0 cm

Battery armor:
Main, 14.0 cm / secondary, 2.5 cm shields
AA, 2.5 cm shields

Aircraft - 2 Seaplanes, 1 Catapult

Maximum speed for 68656 shaft kw = 32.50 knots
Approximate cruising radius, 10500 nm / 12 knots

Typical complement: 540-703


Estimated cost, $10.482 million (£2.620 million)

Remarks:

Relative extent of belt armor, 114 percent of 'typical' coverage.

Magazines and engineering spaces are cramped, with poor
watertight subdivision.

Roomy upper decks; superior accommodation and working space.


Distribution of weights:
Percent
normal
displacement:

Armament ......................... 294 tonnes = 3 pct
Armor, total ..................... 1661 tonnes = 15 pct

Belt 717 tonnes = 6 pct
Deck 340 tonnes = 3 pct
C.T. 42 tonnes = 0 pct
Armament 562 tonnes = 5 pct

Machinery ........................ 3168 tonnes = 29 pct
Hull and fittings; equipment ..... 4516 tonnes = 41 pct
Fuel, ammunition, stores ......... 1406 tonnes = 13 pct
Miscellaneous weights ............ 50 tonnes = 0 pct
-----
11094 tonnes = 100 pct

Estimated metacentric height, 1.1 m

Displacement summary:

Light ship: 9689 tonnes
Standard displacement: 10106 tonnes
Normal service: 11094 tonnes
Full load: 11840 tonnes

Loading submergence 2188 tonnes/metre

+++++++++++++++++++++++++


Estimated overall survivability and seakeeping ability:

Relative margin of stability: 1.22

Shellfire needed to sink: 4459 kg = 40.2 x 20.0-cm shells
(Approximates weight of penetrating
shell hits needed to sink ship,
not counting critical hits)

Torpedoes needed to sink: 1.4
(Approximates number of 'typical'
torpedo hits needed to sink ship)

Relative steadiness as gun platform, 50 percent
(50 percent is 'average')

Relative rocking effect from firing to beam, 0.37

Relative quality as a seaboat: 1.00

+++++++++++++++++++++++++


Hull form characteristics:

Block coefficient: 0.45
Sharpness coefficient: 0.32
Hull speed coefficient 'M' = 8.55
'Natural speed' for length = 25.0 knots
Power going to wave formation
at top speed: 54 percent


Estimated hull characteristics and strength:

Relative underwater volume absorbed by
magazines and engineering spaces: 114 percent

Relative accommodation and working space: 127 percent


Displacement factor: 107 percent
(Displacement relative to loading factors)


Relative cross-sectional hull strength: 0.99
(Structure weight per square
metre of hull surface: 574 kg)

Relative longitudinal hull strength: 1.15
(for 5.43 m average freeboard;
freeboard adjustment +0.72 m)

Relative composite hull strength: 1.00

+++++++++++++++++++++++++


[Machine-readable parameters: Spring Style v. 1.2.1]

623.20 x 63.96 x 21.65; 17.81 -- Dimensions
0.45 -- Block coefficient
1921 -- Year laid down
32.50 / 10500 / 12.00; Oil-fired turbine or equivalent -- Speed / radius / cruise
50 tons -- Miscellaneous weights
++++++++++
8 x 7.87; 3; 1 -- Main battery; turrets; superfiring
:
12 x 3.94; 0 -- Secondary battery; turrets
Gun-shields
:
16 x 1.57 -- Tertiary (QF/AA) battery
Gun-shields
:
6 x 0.51 -- Fourth (light) battery
8 / 0 / 20.87 -- TT / submerged / size
++++++++++
3.94 / 0.00 / 0.00 / 0.00; 114 -- Belt armor; relative extent
0.79 / 3.94 -- Deck / CT
5.51 / 0.98 / 0.98 / 0.00 -- Battery armor


(Note: For portability, values are stored in Anglo-American units)


+++++++++++++++++++++++++++++++++++++++++++++++++++++++


Visit my Russian/French fantasy fleet page:
http://admkuznetsov.tripod.com/

Main armament:


French 200mm/50


Caliber = 20.0 cm (7.9 inch)
Shell weight = 130 kg (287 lbs)
Muzzle velocity = 808 m/s (2650 fps)

Relative ballistic performance: 1.00

Muzzle energy = 42.414 megajoules = 15629.7 foot-tons

Relative muzzle energy: 1.00

Barrel length: 50 calibers


Elevation Range Time Velocity Fall Angle

2.5 deg 4900 meters 6.9 sec 638 m/s 2.9 deg
5.0 deg 8600 meters 13.3 sec 537 m/s 6.6 deg
7.5 deg 11600 meters 19.3 sec 473 m/s 10.7 deg
10.0 deg 14000 meters 24.9 sec 430 m/s 15.1 deg
12.5 deg 16100 meters 30.3 sec 401 m/s 19.7 deg
15.0 deg 18000 meters 35.4 sec 382 m/s 24.2 deg
20.0 deg 21000 meters 45.2 sec 362 m/s 32.9 deg
25.0 deg 23500 meters 54.3 sec 359 m/s 40.3 deg
30.0 deg 25400 meters 63.0 sec 364 m/s 46.7 deg
35.0 deg 26900 meters 71.3 sec 373 m/s 52.1 deg
40.0 deg 27800 meters 79.2 sec 385 m/s 56.6 deg
45.0 deg 28200 meters 86.7 sec 398 m/s 60.6 deg
50.0 deg 28000 meters 93.6 sec 410 m/s 64.0 deg


Armor Penetration - Vertical Belt Armor

(Relative armor quality, 1.00)

Maximum penetration: 40.78 cm


Elevation Range Belt Deck

1.1 deg 2400 meters 35 cm
2.4 deg 4700 meters 30 cm
4.3 deg 7600 meters 25 cm
5.3 deg 9100 meters ... 2 cm
7.2 deg 11200 meters 20 cm
11.9 deg 15600 meters ... 4 cm
12.2 deg 15900 meters 15 cm
19.4 deg 20700 meters ... 6 cm
23.6 deg 22800 meters 10 cm
25.9 deg 23900 meters ... 8 cm
32.8 deg 26300 meters ... 10 cm
40.3 deg 27900 meters ... 12 cm
48.6 deg 28100 meters ... 14 cm


Maximum range = 28200 meters at 45.6 deg elevation

Secondary armament:

French 100mm/55


Caliber = 10.0 cm (3.9 inch)
Shell weight = 16 kg (35 lbs)
Muzzle velocity = 867 m/s (2845 fps)

Relative ballistic performance: 1.00

Muzzle energy = 6.020 megajoules = 2218.4 foot-tons

Relative muzzle energy: 1.14

Barrel length: 55 calibers


Elevation Range Time Velocity Fall Angle

2.5 deg 4800 meters 7.1 sec 543 m/s 3.5 deg
5.0 deg 7700 meters 13.2 sec 415 m/s 8.2 deg
7.5 deg 9700 meters 18.6 sec 349 m/s 13.6 deg
10.0 deg 11300 meters 23.6 sec 311 m/s 19.3 deg
12.5 deg 12500 meters 28.2 sec 288 m/s 25.0 deg
15.0 deg 13600 meters 32.7 sec 274 m/s 30.7 deg
20.0 deg 15400 meters 40.9 sec 263 m/s 40.6 deg
25.0 deg 16700 meters 48.6 sec 264 m/s 48.8 deg
30.0 deg 17700 meters 55.9 sec 270 m/s 55.3 deg
35.0 deg 18400 meters 62.8 sec 279 m/s 60.4 deg
40.0 deg 18700 meters 69.3 sec 288 m/s 64.5 deg
45.0 deg 18800 meters 75.6 sec 298 m/s 68.0 deg
50.0 deg 18400 meters 81.4 sec 306 m/s 70.9 deg


Armor Penetration - Vertical Belt Armor

(Relative armor quality, 1.00)

Maximum penetration: 22.19 cm


Elevation Range Belt Deck

1.4 deg 3000 meters 15 cm
3.5 deg 6100 meters 10 cm
10.7 deg 11600 meters 5 cm
15.5 deg 13800 meters ... 2 cm
34.3 deg 18300 meters ... 4 cm


Maximum range = 18800 meters at 43.0 deg elevation

Visit my Russian/French fantasy fleet page:
http://admkuznetsov.tripod.com

"Main battery: 8 x 20.0-cm (3 turrets; 1 superfiring)"

Why do you use both twins and tripples on a ship?

Quoted

Why do you use both twins and tripples on a ship?

To reduce the number of turrets, and therefore the weight of turret armor. It's a pretty tight design, and I needed every ton I could get! The turret layout is a triple forward and aft and a superfiring dual forward.

Visit my Russian/French fantasy fleet page: http://admkuznetsov.tripod.com