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Friday, July 21st 2006, 11:25am

New Atlantean ships, 1931-32

E-1 class, Atlantean Escort laid down 1931

Displacement:
607 t light; 653 t standard; 920 t normal; 1,134 t full load

Dimensions: Length overall / water x beam x draught
230.36 ft / 225.00 ft x 30.00 ft x 9.00 ft (normal load)
70.21 m / 68.58 m x 9.14 m x 2.74 m

Armament:
4 - 4.50" / 114 mm guns (2x2 guns), 45.56lbs / 20.67kg shells, 1931 Model
Breech loading guns in deck mounts
on centreline ends, evenly spread
4 - 1.58" / 40.0 mm guns (3 mounts), 1.95lbs / 0.88kg shells, 1931 Model
Breech loading guns in deck mounts
on side, evenly spread, 2 raised mounts
6 - 0.79" / 20.1 mm guns in single mounts, 0.25lbs / 0.11kg shells, 1931 Model
Breech loading guns in deck mounts
on side, evenly spread
4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1931 Model
Breech loading guns in deck mounts
on side, evenly spread
Weight of broadside 192 lbs / 87 kg
Shells per gun, main battery: 250

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.57" / 40 mm 1.00" / 25 mm -
2nd: 1.00" / 25 mm - -

- Conning tower: 1.57" / 40 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 4,950 shp / 3,693 Kw = 20.39 kts
Range 8,000nm at 15.00 kts
Bunker at max displacement = 481 tons

Complement:
83 - 108

Cost:
£0.271 million / $1.084 million

Distribution of weights at normal displacement:
Armament: 24 tons, 2.6 %
Armour: 20 tons, 2.2 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 17 tons, 1.9 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 3 tons, 0.3 %
Machinery: 148 tons, 16.1 %
Hull, fittings & equipment: 374 tons, 40.7 %
Fuel, ammunition & stores: 313 tons, 34.0 %
Miscellaneous weights: 40 tons, 4.3 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
1,954 lbs / 886 Kg = 42.9 x 4.5 " / 114 mm shells or 0.8 torpedoes
Stability (Unstable if below 1.00): 1.35
Metacentric height 1.4 ft / 0.4 m
Roll period: 10.7 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.26
Seaboat quality (Average = 1.00): 1.88

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.530
Length to Beam Ratio: 7.50 : 1
'Natural speed' for length: 15.00 kts
Power going to wave formation at top speed: 61 %
Trim (Max stability = 0, Max steadiness = 100): 37
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: 20.00 ft / 6.10 m
- Forecastle (20 %): 18.00 ft / 5.49 m
- Mid (50 %): 18.00 ft / 5.49 m (9.00 ft / 2.74 m aft of break)
- Quarterdeck (15 %): 9.00 ft / 2.74 m
- Stern: 9.00 ft / 2.74 m
- Average freeboard: 13.66 ft / 4.16 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 79.1 %
- Above water (accommodation/working, high = better): 139.6 %
Waterplane Area: 4,624 Square feet or 430 Square metres
Displacement factor (Displacement / loading): 168 %
Structure weight / hull surface area: 42 lbs/sq ft or 204 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.83
- Longitudinal: 5.22
- 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
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

20 tons for DC
10 tons for sonar
10 tons for future growth

2

Friday, July 21st 2006, 11:28am

LCT type 1, Atlantean Landing Craft, Tank laid down 1931

Displacement:
300 t light; 308 t standard; 314 t normal; 318 t full load

Dimensions: Length overall / water x beam x draught
134.24 ft / 125.00 ft x 34.00 ft x 4.10 ft (normal load)
40.92 m / 38.10 m x 10.36 m x 1.25 m

Armament:
2 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1931 Model
Anti-aircraft guns in deck mounts
on centreline ends, evenly spread, all raised mounts
4 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1931 Model
Machine guns in deck mounts
on side, all amidships, all raised mounts - superfiring
Weight of broadside 1 lbs / 0 kg
Shells per gun, main battery: 2,500

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 0.79" / 20 mm 100.00 ft / 30.48 m 4.00 ft / 1.22 m
Ends: 0.39" / 10 mm 25.00 ft / 7.62 m 7.00 ft / 2.13 m
Upper: 0.39" / 10 mm 100.00 ft / 30.48 m 7.00 ft / 2.13 m
Main Belt covers 123 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 0.79" / 20 mm - -

- Conning tower: 1.00" / 25 mm

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 403 shp / 300 Kw = 11.50 kts
Range 1,400nm at 7.00 kts
Bunker at max displacement = 11 tons

Complement:
36 - 48

Cost:
£0.053 million / $0.214 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Armour: 29 tons, 9.3 %
- Belts: 28 tons, 8.9 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 0 tons, 0.1 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 1 tons, 0.3 %
Machinery: 12 tons, 3.8 %
Hull, fittings & equipment: 78 tons, 25.0 %
Fuel, ammunition & stores: 14 tons, 4.4 %
Miscellaneous weights: 180 tons, 57.4 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
480 lbs / 218 Kg = 1,960.2 x 0.8 " / 20 mm shells or 0.6 torpedoes
Stability (Unstable if below 1.00): 1.24
Metacentric height 1.5 ft / 0.4 m
Roll period: 11.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 1.32

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.630
Length to Beam Ratio: 3.68 : 1
'Natural speed' for length: 11.18 kts
Power going to wave formation at top speed: 52 %
Trim (Max stability = 0, Max steadiness = 100): 53
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: 16.00 ft / 4.88 m
- Forecastle (20 %): 7.00 ft / 2.13 m
- Mid (50 %): 7.00 ft / 2.13 m
- Quarterdeck (15 %): 7.00 ft / 2.13 m
- Stern: 7.00 ft / 2.13 m
- Average freeboard: 7.72 ft / 2.35 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 76.2 %
- Above water (accommodation/working, high = better): 118.4 %
Waterplane Area: 3,196 Square feet or 297 Square metres
Displacement factor (Displacement / loading): 134 %
Structure weight / hull surface area: 20 lbs/sq ft or 99 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.62
- Longitudinal: 1.86
- Overall: 0.69
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

3

Friday, July 21st 2006, 11:37am

LCM Type 1

Displacement:
29 t light; 29 t standard; 29 t normal; 30 t full load

Dimensions: Length overall / water x beam x draught
45.70 ft / 45.00 ft x 14.00 ft x 2.50 ft (normal load)
13.93 m / 13.72 m x 4.27 m x 0.76 m

Armament:
2 - 0.30" / 7.6 mm guns in single mounts, 0.01lbs / 0.01kg shells, 1931 Model
Breech loading guns in deck mounts
on centreline ends, evenly spread, all raised mounts
Weight of broadside 0 lbs / 0 kg
Shells per gun, main battery: 800

Armour:
- Conning tower: 10.00" / 254 mm

Machinery:
Petrol Internal combustion motors,
Geared drive, 2 shafts, 33 shp / 24 Kw = 8.00 kts
Range 80nm at 5.00 kts
Bunker at max displacement = 0 tons

Complement:
3

Cost:
£0.005 million / $0.020 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Armour: 2 tons, 7.0 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 0 tons, 0.0 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 2 tons, 7.0 %
Machinery: 1 tons, 3.3 %
Hull, fittings & equipment: 26 tons, 87.1 %
Fuel, ammunition & stores: 1 tons, 2.6 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
387 lbs / 176 Kg = 28,660.5 x 0.3 " / 8 mm shells or 2.2 torpedoes
Stability (Unstable if below 1.00): 1.01
Metacentric height 0.3 ft / 0.1 m
Roll period: 11.4 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 1.22

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.655
Length to Beam Ratio: 3.21 : 1
'Natural speed' for length: 6.71 kts
Power going to wave formation at top speed: 64 %
Trim (Max stability = 0, Max steadiness = 100): 41
Bow angle (Positive = bow angles forward): 5.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 8.00 ft / 2.44 m
- Forecastle (20 %): 5.00 ft / 1.52 m
- Mid (50 %): 5.00 ft / 1.52 m
- Quarterdeck (15 %): 5.00 ft / 1.52 m
- Stern: 5.00 ft / 1.52 m
- Average freeboard: 5.24 ft / 1.60 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 12.8 %
- Above water (accommodation/working, high = better): 77.0 %
Waterplane Area: 485 Square feet or 45 Square metres
Displacement factor (Displacement / loading): 730 %
Structure weight / hull surface area: 36 lbs/sq ft or 173 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.98
- Longitudinal: 25.69
- Overall: 2.55
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is cramped
Good seaboat, rides out heavy weather easily


Draft (loaded): 1'4" forward, 4' aft
Cargo capacity: 12 tons
Engines: 2x100hp

4

Monday, July 24th 2006, 11:00am

What is it with people putting so many guns onto small escorts? The extra firepower is essentially useless as the vessel will hardly ever be in a position to use it, but comes at a massive detriment to deckspace, magazine space, extra crew...

5

Monday, July 24th 2006, 11:04am

Quoted

What is it with people putting so many guns onto small escorts?


Funny I thought the same thing when I saw Italy's newest CL's...

Someone sets the standard and others follow suit. Notice the most guns on an Atlantean CL is 12 and not 16.

6

Monday, July 24th 2006, 12:13pm

Quoted

Funny I thought the same thing when I saw Italy's newest CL's...

Obviously while the Filipinos have their problems wiht this outbreak of a deadly disease, we al know that the Italians are suffering from the disease known as Quad-itis for quite some time now.
:-)

7

Monday, July 24th 2006, 12:47pm

At least those guns are useful for cruisers, but not for small escort vessels.

8

Monday, July 24th 2006, 3:19pm

Quoted

Quoted

What is it with people putting so many guns onto small escorts?


Funny I thought the same thing when I saw Italy's newest CL's...


I'd say you're both right.

9

Monday, July 31st 2006, 4:34pm

Speaking of too many guns in small ships. My frigates are simply overgunned. 3x4.7" and 4x3" in 900 tons. Thats the result of stuffing a post WWII Fletcher rebuilt into 900 tons. If its not a problem Ill change them to smething more realistic.



Original version:

A-1, Australia Frigate laid down 1928

Displacement:
857 t light; 902 t standard; 1,246 t normal; 1,521 t full load

Dimensions: Length overall / water x beam x draught
290.00 ft / 290.00 ft x 32.00 ft x 10.00 ft (normal load)
88.39 m / 88.39 m x 9.75 m x 3.05 m

Armament:
3 - 4.70" / 119 mm guns in single mounts, 51.91lbs / 23.55kg shells, 1929 Model
Dual purpose guns in deck mounts
on centreline ends, majority forward, 1 raised mount
4 - 2.99" / 75.9 mm guns (2x2 guns), 13.37lbs / 6.06kg shells, 1929 Model
Quick firing guns in deck mounts
on centreline, all aft, all raised mounts - superfiring
4 - 1.57" / 40.0 mm guns (2x2 guns), 1.95lbs / 0.88kg shells, 1929 Model
Anti-aircraft guns in deck mounts
on centreline, evenly spread
8 - 0.79" / 20.0 mm guns (4x2 guns), 0.24lbs / 0.11kg shells, 1929 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 219 lbs / 99 kg
Shells per gun, main battery: 150

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.20" / 30 mm - -

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 9,786 shp / 7,300 Kw = 24.00 kts
Range 9,100nm at 15.00 kts
Bunker at max displacement = 619 tons

Complement:
104 - 136

Cost:
£0.380 million / $1.521 million

Distribution of weights at normal displacement:
Armament: 27 tons, 2.2 %
Armour: 9 tons, 0.8 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 9 tons, 0.8 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 301 tons, 24.1 %
Hull, fittings & equipment: 500 tons, 40.1 %
Fuel, ammunition & stores: 389 tons, 31.2 %
Miscellaneous weights: 20 tons, 1.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
2,005 lbs / 910 Kg = 38.6 x 4.7 " / 119 mm shells or 0.7 torpedoes
Stability (Unstable if below 1.00): 1.40
Metacentric height 1.6 ft / 0.5 m
Roll period: 10.6 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.22
Seaboat quality (Average = 1.00): 1.35

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.470
Length to Beam Ratio: 9.06 : 1
'Natural speed' for length: 17.03 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 52
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: 15.00 ft / 4.57 m
- Forecastle (20 %): 12.00 ft / 3.66 m
- Mid (50 %): 12.00 ft / 3.66 m
- Quarterdeck (15 %): 12.00 ft / 3.66 m
- Stern: 12.00 ft / 3.66 m
- Average freeboard: 12.24 ft / 3.73 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 97.5 %
- Above water (accommodation/working, high = better): 132.3 %
Waterplane Area: 6,020 Square feet or 559 Square metres
Displacement factor (Displacement / loading): 147 %
Structure weight / hull surface area: 48 lbs/sq ft or 233 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.91
- Longitudinal: 2.33
- 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


****

Fixed version:

FF-1, Australia Frigate laid down 1929

Displacement:
867 t light; 906 t standard; 1,246 t normal; 1,518 t full load

Dimensions: Length overall / water x beam x draught
290.00 ft / 290.00 ft x 32.00 ft x 10.00 ft (normal load)
88.39 m / 88.39 m x 9.75 m x 3.05 m

Armament:
3 - 4.70" / 119 mm guns in single mounts, 51.91lbs / 23.55kg shells, 1929 Model
Dual purpose guns in deck mounts
on centreline ends, majority forward, 1 raised mount
4 - 1.57" / 40.0 mm guns (2x2 guns), 1.95lbs / 0.89kg shells, 1929 Model
Quick firing guns in deck mounts
on centreline, all aft, all raised mounts - superfiring
8 - 0.79" / 20.0 mm guns (4x2 guns), 0.24lbs / 0.11kg shells, 1929 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 165 lbs / 75 kg
Shells per gun, main battery: 150

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.20" / 30 mm - -

Machinery:
Diesel Internal combustion motors,
Geared drive, 2 shafts, 9,786 shp / 7,300 Kw = 24.00 kts
Range 9,000nm at 15.00 kts
Bunker at max displacement = 612 tons

Complement:
104 - 136

Cost:
£0.359 million / $1.437 million

Distribution of weights at normal displacement:
Armament: 21 tons, 1.7 %
Armour: 9 tons, 0.8 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 9 tons, 0.8 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 301 tons, 24.1 %
Hull, fittings & equipment: 511 tons, 41.0 %
Fuel, ammunition & stores: 380 tons, 30.5 %
Miscellaneous weights: 25 tons, 2.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
2,070 lbs / 939 Kg = 39.9 x 4.7 " / 119 mm shells or 0.7 torpedoes
Stability (Unstable if below 1.00): 1.38
Metacentric height 1.6 ft / 0.5 m
Roll period: 10.7 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.16
Seaboat quality (Average = 1.00): 1.34

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.470
Length to Beam Ratio: 9.06 : 1
'Natural speed' for length: 17.03 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 52
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: 15.00 ft / 4.57 m
- Forecastle (20 %): 12.00 ft / 3.66 m
- Mid (50 %): 12.00 ft / 3.66 m
- Quarterdeck (15 %): 12.00 ft / 3.66 m
- Stern: 12.00 ft / 3.66 m
- Average freeboard: 12.24 ft / 3.73 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 93.8 %
- Above water (accommodation/working, high = better): 132.3 %
Waterplane Area: 6,020 Square feet or 559 Square metres
Displacement factor (Displacement / loading): 156 %
Structure weight / hull surface area: 49 lbs/sq ft or 238 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 2.38
- Overall: 1.05
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