Quoted
[SIZE=3]E42, French Escorteurs Rapide laid down 1942[/SIZE]
Displacement:
1,185 t light; 1,302 t standard; 1,547 t normal; 1,743 t full load
Dimensions: Length overall / water x beam x draught
328.19 ft / 314.96 ft x 33.79 ft x 12.11 ft (normal load)
100.03 m / 96.00 m x 10.30 m x 3.69 m
Armament:
6 - 3.94" / 100 mm guns (3x2 guns), 35.27lbs / 16.00kg shells, 1942 Model
Automatic rapid fire guns in deck mounts with hoists
on centreline ends, majority aft, 2 raised mounts - superfiring
8 - 1.57" / 40.0 mm guns (4x2 guns), 1.95lbs / 0.89kg shells, 1942 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1942 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 227 lbs / 103 kg
Shells per gun, main battery: 650
6 - 21.7" / 550 mm above water torpedoes
Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.98" / 25 mm 0.39" / 10 mm 0.39" / 10 mm
2nd: 0.39" / 10 mm 0.20" / 5 mm -
Machinery:
Oil fired boilers, steam turbines plus diesel motors,
Geared drive, 2 shafts, 16,568 shp / 12,360 Kw = 28.00 kts
Range 4,500nm at 18.00 kts
Bunker at max displacement = 441 tons
Complement:
123 - 160
Cost:
£0.807 million / $3.227 million
Distribution of weights at normal displacement:
Armament: 29 tons, 1.9 %
Armour: 11 tons, 0.7 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 11 tons, 0.7 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 433 tons, 28.0 %
Hull, fittings & equipment: 552 tons, 35.7 %
Fuel, ammunition & stores: 362 tons, 23.4 %
Miscellaneous weights: 160 tons, 10.3 %
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,123 lbs / 509 Kg = 36.8 x 3.9 " / 100 mm shells or 0.5 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 1.2 ft / 0.4 m
Roll period: 12.8 seconds
Steadiness - As gun platform (Average = 50 %): 62 %
- Recoil effect (Restricted arc if above 1.00): 0.45
Seaboat quality (Average = 1.00): 1.19
Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.420
Length to Beam Ratio: 9.32 : 1
'Natural speed' for length: 20.59 kts
Power going to wave formation at top speed: 62 %
Trim (Max stability = 0, Max steadiness = 100): 52
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21.33 ft / 6.50 m
- Forecastle (25 %): 16.40 ft / 5.00 m
- Mid (55 %): 11.48 ft / 3.50 m
- Quarterdeck (15 %): 11.48 ft / 3.50 m
- Stern: 11.48 ft / 3.50 m
- Average freeboard: 13.94 ft / 4.25 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 121.3 %
- Above water (accommodation/working, high = better): 79.6 %
Waterplane Area: 6,890 Square feet or 640 Square metres
Displacement factor (Displacement / loading): 122 %
Structure weight / hull surface area: 43 lbs/sq ft or 210 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.68
- Longitudinal: 2.44
- Overall: 0.77
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Quoted
Originally posted by HoOmAn
Hi,
question: Are you serious about those super-heavy shells of 925kg for those 15" guns on Alsace? Seems too heavy to me.
Quoted
Originally posted by HoOmAn
I wasn't aware of shell weight before, else I would have commented because I think these shells are quite heavy, probably too much so.
The heaviest historical 15" shells were the French APC model 1943 at 890kg, followed by the Italian APC at 885kg and the British APC Mark XXIIB (6crh) at 879kg. Finally, the Germans used shells of 800kg.
Regardinf HE ammunition, the Italians and French used lighter shells, while the Germans and the British had a standard shell weight.
The historical French shells are usually dubbed heavy for their size, so I wondered if a shell of 925kg is pushing things a bit. But I may have missed something, probably some other ammo existed that provides a historical example of such a heavy 15" shell? Or have their been other, WW related reasons why the French would opt for an even heavier (larger) shell?
Quoted
Originally posted by HoOmAn
EDIT: While I am at it - I assume those 34cm guns have a maximum elevation of 18°, correct? Or have modifications been applied during your 1931 refit to increase elevation to 23° as happened historically in the 1920s? I cannot find any reference...
Quoted
ShinRa had a theory regarding shell weights, and the theory sounded good enough to me that I determined to adopt it. He suggested that the shell weights listed in Springsharp are not necessarily the weight of the shells being fired (though they may be) but rather the maximum weight rating of the shell hoists and the weight planned for in the magazines. Thus, I'd say "The weight of the French shells in use are not necessarily 925kg, but they can not be greater than 925kg in the current versions of the guns."
Quoted
Originally posted by Rooijen10
Quoted
ShinRa had a theory regarding shell weights, and the theory sounded good enough to me that I determined to adopt it. He suggested that the shell weights listed in Springsharp are not necessarily the weight of the shells being fired (though they may be) but rather the maximum weight rating of the shell hoists and the weight planned for in the magazines. Thus, I'd say "The weight of the French shells in use are not necessarily 925kg, but they can not be greater than 925kg in the current versions of the guns."
The way I look at it is that it is an average of the shells used so in case of Japan's 15" guns it's a 2100 lbs APC and a 1900 lbs HE. Using KISS and a 50-50 ratio, you're looking at a 2000 lbs average.
Quoted
Originally posted by HoOmAn
I do agree that the shell weight given by SS defines maximum weight, i.e. for APC while the HE projectile used might be lighter. Or for smaller shells in general. However, by saying so you imply the shells used are actually lighter. Please provide information what shells are currently in use.
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