WesWorld

Petrel class, French Coastal Submarine laid down 1907
Displacement:
435 t light; 447 t standard; 540 t normal; 612 t full load
Loading submergence 52 tons/feet
Dimensions:
149.28 ft x 19.69 ft x 13.12 ft (normal load)
45.50 m x 6.00 m x 4.00 m
Armament:
1 - 2.95" / 75 mm guns
Weight of broadside 13 lbs / 6 kg
4 - 17.7" / 450 mm submerged torpedo tubes forward
Operational depth - 108m/353 ft
Emergency depth - 172m/565 ft
Crush depth - 269m/882 ft
Machinery:
Diesel Internal combustion generators plus batteries,
Electric motors, 1 shaft, 920 shp / 686 Kw = 14.00 kts
Range 5,000nm at 10.00 kts
Complement:
28 - 36
Cost:
£0.024 million / $0.096 million
Distribution of weights at normal displacement:
Armament: 2 tons, 0.3 %
Machinery: 52 tons, 9.7 %
Hull, fittings & equipment: 291 tons, 54.0 %
Fuel, ammunition & stores: 105 tons, 19.4 %
Miscellaneous weights: 90 tons, 16.7 %
Metacentric height 0.5
Remarks:
Hull space for machinery, storage & compartmentation is adequate
Room for accommodation & workspaces is extremely poor
Ship has quick, lively roll, not a steady gun platform
Caution: Lacks seaworthiness - very limited seakeeping ability
Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.11
Shellfire needed to sink: 271 lbs / 123 Kg = 21.1 x 3.0 " / 75 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 0.2
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 0 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.00
Relative quality as seaboat: 0.00
Hull form characteristics:
Block coefficient: 0.490
Sharpness coefficient: 0.36
Hull speed coefficient 'M': 5.60
'Natural speed' for length: 12.22 kts
Power going to wave formation at top speed: 51 %
Trim: 50
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)
Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 102.4 %
Relative accommodation and working space: 0.0 %
(Average = 100%)
Displacement factor: 260 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 3.55
(Structure weight / hull surface area: 99 lbs / square foot or 483 Kg / square metre)
Relative longitudinal hull strength: 3.52
(for 0.00 ft / 0.00 m average freeboard, freeboard adjustment -8.45 ft)
Relative composite hull strength: 3.53

Falcon class, French Coastal Submarine laid down 1919

Displacement:

440 t light; 451 t standard; 503 t normal; 543 t full load

Loading submergence 50 tons/feet

Dimensions:

147.64 ft x 19.69 ft x 12.89 ft (normal load)

45.00 m x 6.00 m x 3.93 m

Armament:

1 - 2.95" / 75 mm guns

Weight of broadside 13 lbs / 6 kg

4 - 21.0" / 533 mm submerged torpedo tubes forward

25 tons mines

Operational depth - 122m/ 399 ft

Emergency depth - 195m/ 638 ft

crush depth - 304m/ 998 ft

Machinery:

Diesel Internal combustion generators plus batteries,

Electric motors, 1 shaft, 488 shp / 364 Kw = 12.00 kts

Range 5,000nm at 10.00 kts

Complement:

53 - 69

Cost:

£0.042 million / $0.167 million

Distribution of weights at normal displacement:

Armament: 2 tons, 0.3 %

Machinery: 17 tons, 3.4 %

Hull, fittings & equipment: 311 tons, 61.9 %

Fuel, ammunition & stores: 63 tons, 12.5 %

Miscellaneous weights: 110 tons, 21.9 %

Metacentric height 0.5

Remarks:

Hull space for machinery, storage & compartmentation is adequate

Room for accommodation & workspaces is extremely poor

Ship has quick, lively roll, not a steady gun platform

Caution: Lacks seaworthiness - very limited seakeeping ability

Estimated overall survivability and seakeeping ability:

Relative margin of stability: 1.04

Shellfire needed to sink: 280 lbs / 127 Kg = 21.7 x 3.0 " / 75 mm shells

(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)

Torpedoes needed to sink: 0.2

(Approx number of typical torpedo hits needed to sink ship)

Relative steadiness as gun platform: 0 %

(Average = 50 %)

Relative rocking effect from firing to beam: 0.00

Relative quality as seaboat: 0.00

Hull form characteristics:

Block coefficient: 0.470

Sharpness coefficient: 0.35

Hull speed coefficient 'M': 5.67

'Natural speed' for length: 12.15 kts

Power going to wave formation at top speed: 42 %

Trim: 50

(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:

Underwater volume absorbed by magazines and engineering spaces: 91.8 %

Relative accommodation and working space: 0.0 %

(Average = 100%)

Displacement factor: 319 %

(Displacement relative to loading factors)

Relative cross-sectional hull strength: 3.99

(Structure weight / hull surface area: 110 lbs / square foot or 536 Kg / square metre)

Relative longitudinal hull strength: 3.99

(for 0.00 ft / 0.00 m average freeboard, freeboard adjustment -8.33 ft)

Relative composite hull strength: 3.99

CS-27 coastal submarine, laid down 1927

Length, 45.5 m x Beam, 6.0 m x Depth, 3.9 m
508 tonnes normal displacement (448 tonnes standard)

Main battery: 1 x 7.5-cm
Secondary battery: 1 x 4.0-cm

Weight of broadside: 7 kg

4 TT, 53.3 cm (submerged)

Hull unarmored

Operational Depth: 388ft/118m
Emergency Depth: 621ft/189m
Crush Depth: 970ft/296m

Maximum speed for 365 shaft kw = 12.00 knots
Approximate cruising radius, 6500 nm / 10 knots

Typical complement: 27-35


Estimated cost, $276,000 (£69,000)

Remarks:

Caution: lacks seaworthiness -- very limited seakeeping ability.

Caution: Very cramped ship with excessively poor habitability;
lacks suitable working space.

Ship has quick, 'lively' roll; not a steady gun platform.


Distribution of weights:
Percent
normal
displacement:

Armament ......................... 2 tonnes = 0 pct
Machinery ........................ 15 tonnes = 3 pct
Hull and fittings; equipment ..... 309 tonnes = 61 pct
Fuel, ammunition, stores ......... 72 tonnes = 14 pct
Miscellaneous weights ............ 110 tonnes = 22 pct
-----
508 tonnes = 100 pct

Estimated metacentric height, 0.1 m

Displacement summary:

Light ship: 436 tonnes
Standard displacement: 448 tonnes
Normal service: 508 tonnes
Full load: 555 tonnes

Loading submergence 166 tonnes/metre

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


Estimated overall survivability and seakeeping ability:

Relative margin of stability: 1.04

Shellfire needed to sink: 125 kg = 21.3 x 7.5-cm shells
(Approximates weight of penetrating
shell hits needed to sink ship,
not counting critical hits)

Torpedoes needed to sink: 0.1
(Approximates number of 'typical'
torpedo hits needed to sink ship)

Relative steadiness as gun platform, 1 percent
(50 percent is 'average')

Relative rocking effect from firing to beam, 0.00

Relative quality as a seaboat: 0.00

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


Hull form characteristics:

Block coefficient: 0.47
Sharpness coefficient: 0.35
Hull speed coefficient 'M' = 5.71
'Natural speed' for length = 12.2 knots
Power going to wave formation
at top speed: 42 percent


Estimated hull characteristics and strength:

Relative underwater volume absorbed by
magazines and engineering spaces: 95 percent

Relative accommodation and working space: 1 percent


Displacement factor: 327 percent
(Displacement relative to loading factors)


Relative cross-sectional hull strength: 3.88
(Structure weight per square
metre of hull surface: 526 kg)

Relative longitudinal hull strength: 3.89
(for 0.03 m average freeboard;
freeboard adjustment -2.51 m)

Relative composite hull strength: 3.88

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


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

149.24 x 19.68 x 12.89; 0.10 -- Dimensions
0.47 -- Block coefficient
1927 -- Year laid down
12.00 / 6500 / 10.00; Oil-fired turbine or equivalent -- Speed / radius / cruise
110 tons -- Miscellaneous weights
++++++++++
1 x 2.95; 0 -- Main battery; turrets
Central positioning of guns
:
1 x 1.57; 0 -- Secondary battery; turrets
:
0 -- No tertiary (QF/AA) battery
0 -- No fourth (light) battery
4 / 4 / 20.98 -- TT / submerged / size
++++++++++
0.00 -- No belt armor
0.00 / 0.00 -- Deck / CT
0.00 -- No battery armor


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


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

CS-1930, French Submarine laid down 1930

Displacement:
406 t light; 419 t standard; 527 t normal; 614 t full load

Dimensions: Length overall / water x beam x draught
149.28 ft / 149.28 ft x 20.34 ft x 12.80 ft (normal load)
45.50 m / 45.50 m x 6.20 m x 3.90 m

Armament:
1 - 2.95" / 75.0 mm guns in single mounts, 12.87lbs / 5.84kg shells, 1930 Model
Breech loading gun in deck mount
on centreline forward
1 - 1.57" / 40.0 mm guns in single mounts, 1.95lbs / 0.89kg shells, 1930 Model
Breech loading gun in deck mount
on centreline aft
Weight of broadside 15 lbs / 7 kg
Shells per gun, main battery: 250
6 - 21.7" / 550 mm submerged torpedo tubes

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: 0.98" / 25 mm

Machinery:
Diesel Internal combustion generators plus batteries,
Electric motors, 2 shafts, 2,512 shp / 1,874 Kw = 18.00 kts
Range 12,100nm at 10.00 kts
Bunker at max displacement = 195 tons

Complement:
27 - 35

Cost:
£0.111 million / $0.442 million

Distribution of weights at normal displacement:
Armament: 2 tons, 0.4 %
Armour: 3 tons, 0.5 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 1 tons, 0.3 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 1 tons, 0.3 %
Machinery: 76 tons, 14.4 %
Hull, fittings & equipment: 215 tons, 40.8 %
Fuel, ammunition & stores: 121 tons, 23.0 %
Miscellaneous weights: 110 tons, 20.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
10 lbs / 5 Kg = 0.8 x 3.0 " / 75 mm shells or 0.0 torpedoes
Stability (Unstable if below 1.00): 1.01
Metacentric height 0.5 ft / 0.1 m
Roll period: 12.5 seconds
Steadiness - As gun platform (Average = 50 %): 0 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 0.00

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.475
Length to Beam Ratio: 7.34 : 1
'Natural speed' for length: 12.22 kts
Power going to wave formation at top speed: 64 %
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: 0.00 ft / 0.00 m
- Forecastle (20 %): 0.00 ft / 0.00 m
- Mid (50 %): 0.00 ft / 0.00 m
- Quarterdeck (15 %): 0.00 ft / 0.00 m
- Stern: 0.00 ft / 0.00 m
- Average freeboard: 0.00 ft / 0.00 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 507.7 %
- Above water (accommodation/working, high = better): 0.0 %
Waterplane Area: 1,978 Square feet or 184 Square metres
Displacement factor (Displacement / loading): 188 %
Structure weight / hull surface area: 72 lbs/sq ft or 353 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 2.53
- Longitudinal: 2.49
- Overall: 2.50
Hull space for machinery, storage, compartmentation is extremely poor
Room for accommodation and workspaces is extremely poor
Ship has quick, lively roll, not a steady gun platform
Caution: Lacks seaworthiness - very limited seakeeping ability

Operational depth - 250 ft/ 76m
Emergency depth - 400 ft/ 122m
Crush depth - 625 ft/ 191m

Suplementary Note (Subsim recast info):

Daphne-class Submarine

Date: 1939
Coastal
Armament 1x100mm
ElecHP: 1600hp
DieselHP: 2800hp
Crew: 40
wt fuel&batts: 320t
Light Displacement 600t
Loaded Displacement 760t
Full Displacement 1022t
Reserve buoyancy: 26%
Max Surf Speed: 15.3 knots
Max Sub Speed: 9.2 knots

Length: 57.8m
Beam: 6.7m
Draft: 5.3m
Crush depth: 250m
#TT 8 x 550mm (6 bow, 2 stern, 14 reloads)
Tons Oil: 160.0t
Tons Battery: 160.0t
Cruise speed: 12 knots
Submerged speed: 6 knots

Surface Range: 7065nm@12 knots
Submerged Range: 57nm@6 knots

Units in Class:
SS Daphné
SS Diane
SS Doris
SS Eurydice
SS Flore
SS Junon
SS Vénus
SS Sirène
SS Fresnel
SS Créole
SS Bayadère
SS Favorite
SS Monge
SS Henri Poincaré
SS Pascal
SS Pasteur
SS Pégase
SS Persée
SS Phénix
SS Poncelet
SS Prométhée
SS Psyché
SS Hermione
SS Gorgone