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1

Monday, January 28th 2019, 4:11am

RAN 1945+ catalog

First project, which had mention in Foxy's last report but lacked a detailed report, a modernization of the Alacrity class destroyers.

First proposal is a moderate level 3 overhaul (15%/240t) to include upgrading the weapons and electronics suites, second is more comprehensive including a new power plant (25%/400t) The subsequent Dauntless and Firefly classes would get similar if not identical refits, since despite build dates of 1933 and 1935, I can find no separate sim report for them, and assume they were built to the 1928 plans.

Quoted

HMAS Aclarity, Australian Destroyer laid down 1928

Displacement:
1,600 t light; 1,674 t standard; 1,947 t normal; 2,166 t full load

Dimensions: Length overall / water x beam x draught
371.92 ft / 370.00 ft x 35.00 ft x 12.90 ft (normal load)
113.36 m / 112.78 m x 10.67 m x 3.93 m

Armament:
4 - 4.72" / 120 mm guns in single mounts, 52.58lbs / 23.85kg shells, 1945 Model
Automatic rapid fire guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
4 - 2.24" / 57.0 mm guns (2x2 guns), 5.65lbs / 2.56kg shells, 1945 Model
Breech loading guns in deck mounts
on side, evenly spread
10 - 0.79" / 20.0 mm guns (5x2 guns), 0.24lbs / 0.11kg shells, 1928 Model
Breech loading guns in deck mounts
on side, evenly spread
Weight of broadside 235 lbs / 107 kg
Shells per gun, main battery: 250
8 - 21.0" / 533.4 mm above water torpedoes

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

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 34,295 shp / 25,584 Kw = 33.00 kts
Range 5,900nm at 15.00 kts
Bunker at max displacement = 493 tons

Complement:
146 - 190

Cost:
£0.816 million / $3.266 million

Distribution of weights at normal displacement:
Armament: 35 tons, 1.8 %
Armour: 11 tons, 0.5 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 11 tons, 0.5 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 919 tons, 47.2 %
Hull, fittings & equipment: 571 tons, 29.3 %
Fuel, ammunition & stores: 347 tons, 17.8 %
Miscellaneous weights: 65 tons, 3.3 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
588 lbs / 267 Kg = 11.2 x 4.7 " / 120 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.28
Metacentric height 1.6 ft / 0.5 m
Roll period: 11.5 seconds
Steadiness - As gun platform (Average = 50 %): 68 %
- Recoil effect (Restricted arc if above 1.00): 0.38
Seaboat quality (Average = 1.00): 1.21

Hull form characteristics:
Hull has raised forecastle
and transom stern
Block coefficient: 0.408
Length to Beam Ratio: 10.57 : 1
'Natural speed' for length: 22.12 kts
Power going to wave formation at top speed: 65 %
Trim (Max stability = 0, Max steadiness = 100): 56
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: 21.90 ft / 6.68 m
- Forecastle (30 %): 19.00 ft / 5.79 m (14.00 ft / 4.27 m aft of break)
- Mid (50 %): 14.00 ft / 4.27 m
- Quarterdeck (15 %): 14.00 ft / 4.27 m
- Stern: 14.00 ft / 4.27 m
- Average freeboard: 15.85 ft / 4.83 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 170.3 %
- Above water (accommodation/working, high = better): 87.2 %
Waterplane Area: 8,313 Square feet or 772 Square metres
Displacement factor (Displacement / loading): 78 %
Structure weight / hull surface area: 34 lbs/sq ft or 166 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 1.97
- Overall: 0.57
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Good seaboat, rides out heavy weather easily

1945 Modernization -
Upgrade main armament to 4.72" Automatics (Q turret removed)
Upgrade 40mm to 57mm
Addition of Radar, Sonar, DC throwers, etc.


Quoted

HMAS Aclarity, Australian Destroyer laid down 1928 (Engine 1945)

Displacement:
1,600 t light; 1,703 t standard; 1,983 t normal; 2,207 t full load

Dimensions: Length overall / water x beam x draught
371.92 ft / 370.00 ft x 35.00 ft x 12.90 ft (normal load)
113.36 m / 112.78 m x 10.67 m x 3.93 m

Armament:
8 - 4.72" / 120 mm guns (4x2 guns), 52.58lbs / 23.85kg shells, 1945 Model
Automatic rapid fire guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
4 - 2.24" / 57.0 mm guns (2x2 guns), 5.65lbs / 2.56kg shells, 1945 Model
Breech loading guns in deck mounts
on side, evenly spread
10 - 0.79" / 20.0 mm guns (5x2 guns), 0.24lbs / 0.11kg shells, 1928 Model
Breech loading guns in deck mounts
on side, evenly spread
Weight of broadside 446 lbs / 202 kg
Shells per gun, main battery: 250
8 - 21.0" / 533.4 mm above water torpedoes

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

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 34,872 shp / 26,014 Kw = 33.00 kts
Range 7,000nm at 15.00 kts
Bunker at max displacement = 504 tons

Complement:
148 - 193

Cost:
£0.845 million / $3.381 million

Distribution of weights at normal displacement:
Armament: 66 tons, 3.3 %
Armour: 18 tons, 0.9 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 18 tons, 0.9 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 784 tons, 39.5 %
Hull, fittings & equipment: 637 tons, 32.1 %
Fuel, ammunition & stores: 383 tons, 19.3 %
Miscellaneous weights: 95 tons, 4.8 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
668 lbs / 303 Kg = 12.7 x 4.7 " / 120 mm shells or 0.4 torpedoes
Stability (Unstable if below 1.00): 1.23
Metacentric height 1.5 ft / 0.5 m
Roll period: 11.9 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.67
Seaboat quality (Average = 1.00): 1.12

Hull form characteristics:
Hull has raised forecastle
and transom stern
Block coefficient: 0.416
Length to Beam Ratio: 10.57 : 1
'Natural speed' for length: 22.10 kts
Power going to wave formation at top speed: 65 %
Trim (Max stability = 0, Max steadiness = 100): 45
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: 21.90 ft / 6.68 m
- Forecastle (30 %): 19.00 ft / 5.79 m (14.00 ft / 4.27 m aft of break)
- Mid (50 %): 14.00 ft / 4.27 m
- Quarterdeck (15 %): 14.00 ft / 4.27 m
- Stern: 14.00 ft / 4.27 m
- Average freeboard: 15.85 ft / 4.83 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 159.6 %
- Above water (accommodation/working, high = better): 86.5 %
Waterplane Area: 8,355 Square feet or 776 Square metres
Displacement factor (Displacement / loading): 82 %
Structure weight / hull surface area: 38 lbs/sq ft or 184 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 2.02
- Overall: 0.58
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped

1945 Modernization -
Reengined with additional bunkerage
Upgrade main armament to 4.72" Twin Automatics (Q turret removed)
Upgrade 40mm to 57mm
Addition of Radar, Sonar, DC throwers, etc.

2

Monday, January 28th 2019, 4:35am

The 57mm guns are simmed as breach-loading guns; presumably a mistake.

Of the two choices, I'd probably prefer the cheaper level three overhaul. These destroyers are decent for late 20s / early 30s destroyers, but they're fairly small and probably not worth too extensive a refit. Just my opinion.

3

Monday, January 28th 2019, 4:51am

Yeah, that's a common goof I make. Adjusted both sims to 57mm Automatics, the cheap one loses 5t misc weight, no other effects for the latter design.

New construction is the ultimate solution, but even a crash program will take time to create the amount of destroyers I feel Oz needs, so no matter what, they're expected to be on the rolls for another 10-15 years.

4

Monday, January 28th 2019, 9:44am

I would go for a mix of refits
The Alacrity class have machinery and hulls 18 years old (as of 1946), so they only realistically have around 8 years effective life left. So its probably not worth doing more than the 25% refit on these to update them enough to keep them relevant.
The Dauntless class have machinery and hulls 13 years old (as of 1946), they could realistically last another 10-15 years service, they could probably last with their original powerplant but the new powerplant gives much better range which is vital for RAN operations, so its cost effective and worth doing the full 50% refit on these ships.
Firefly class have machinery and hulls 12 years old (as of 1946), they could realistically last another 10-15 years service, like the Dauntlesses, they too could make do with the original machinery. I think a 50% refit should be option for these ships depending on whether tonnage and dock space is available, or whether the pressures refits of other ships makes the cheaper and quicker 25% refit more appealing.

5

Monday, January 28th 2019, 2:28pm

I would go for a mix of refits

Eh, that could be viable, too.

If you were able to sim up an Alacrity subclass with a 1933 sim date, I'd be fine if you substituted that sim for the Dauntless and Firefly subclasses. As long as the major specs (size, armament, light tonnage, etc) didn't change, I think it would be perfectly fine to use that instead of the 1928 base design. I believe we've allowed that in the past, but can't recall where or when.

6

Tuesday, January 29th 2019, 5:18am

With an annual output of 40000tons, the difference between 240t and 400t per refit (Or 1200 vs 2000 for each class) isn't a drastic concern, and I'd lean towards the more capable refits by a strictly game mechanics evaluation. Likewise, by game mechanics, either refit gives the life extention refurbishment that should last another 15 years.


I ginned up a report for a 1933 update for the Dauntless and Firefly classes, based on the above - Same light tonnage cost, main adjustment is additional bunkerage and some Misc weight.

Quoted

HMAS Dauntless, Australian Destroyer laid down 1933

Displacement:
1,547 t light; 1,626 t standard; 1,909 t normal; 2,136 t full load

Dimensions: Length overall / water x beam x draught
371.92 ft / 370.00 ft x 35.00 ft x 12.90 ft (normal load)
113.36 m / 112.78 m x 10.67 m x 3.93 m

Armament:
4 - 4.72" / 120 mm guns in single mounts, 52.58lbs / 23.85kg shells, 1933 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
1 - 4.72" / 120 mm guns in single mounts, 52.58lbs / 23.85kg shells, 1933 Model
Dual purpose gun in a deck mount with hoist
on centreline amidships
4 - 1.57" / 40.0 mm guns (2x2 guns), 1.95lbs / 0.89kg shells, 1933 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
10 - 0.79" / 20.0 mm guns (5x2 guns), 0.24lbs / 0.11kg shells, 1933 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 273 lbs / 124 kg
Shells per gun, main battery: 250
8 - 21.0" / 533.4 mm above water torpedoes

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

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 33,683 shp / 25,128 Kw = 33.00 kts
Range 6,500nm at 15.00 kts
Bunker at max displacement = 510 tons

Complement:
143 - 187

Cost:
£0.973 million / $3.892 million

Distribution of weights at normal displacement:
Armament: 34 tons, 1.8 %
Armour: 13 tons, 0.7 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 13 tons, 0.7 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 879 tons, 46.0 %
Hull, fittings & equipment: 587 tons, 30.7 %
Fuel, ammunition & stores: 362 tons, 19.0 %
Miscellaneous weights: 35 tons, 1.8 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
637 lbs / 289 Kg = 12.1 x 4.7 " / 120 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.36
Metacentric height 1.8 ft / 0.5 m
Roll period: 11.0 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.40
Seaboat quality (Average = 1.00): 1.23

Hull form characteristics:
Hull has raised forecastle
and transom stern
Block coefficient: 0.400
Length to Beam Ratio: 10.57 : 1
'Natural speed' for length: 22.15 kts
Power going to wave formation at top speed: 64 %
Trim (Max stability = 0, Max steadiness = 100): 49
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: 21.90 ft / 6.68 m
- Forecastle (30 %): 19.00 ft / 5.79 m (14.00 ft / 4.27 m aft of break)
- Mid (50 %): 14.00 ft / 4.27 m
- Quarterdeck (15 %): 14.00 ft / 4.27 m
- Stern: 14.00 ft / 4.27 m
- Average freeboard: 15.85 ft / 4.83 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 165.4 %
- Above water (accommodation/working, high = better): 88.6 %
Waterplane Area: 8,273 Square feet or 769 Square metres
Displacement factor (Displacement / loading): 84 %
Structure weight / hull surface area: 35 lbs/sq ft or 171 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 2.06
- Overall: 0.57
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped
Good seaboat, rides out heavy weather easily



with a 15% refit, revising the main armament from 5x1 to 3x2 automatics. A 25% refit would pretty much result in the same as above.

Quoted

HMAS Dauntless, Australian Destroyer laid down 1933

Displacement:
1,600 t light; 1,689 t standard; 1,978 t normal; 2,210 t full load

Dimensions: Length overall / water x beam x draught
371.92 ft / 370.00 ft x 35.00 ft x 12.90 ft (normal load)
113.36 m / 112.78 m x 10.67 m x 3.93 m

Armament:
6 - 4.72" / 120 mm guns (3x2 guns), 52.58lbs / 23.85kg shells, 1945 Model
Automatic rapid fire guns in deck mounts with hoists
on centreline ends, majority forward, 1 raised mount - superfiring
4 - 2.24" / 57.0 mm guns (2x2 guns), 5.65lbs / 2.56kg shells, 1945 Model
Automatic rapid fire guns in deck mounts with hoists
on side, evenly spread
10 - 0.79" / 20.0 mm guns (5x2 guns), 0.24lbs / 0.11kg shells, 1933 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 341 lbs / 154 kg
Shells per gun, main battery: 250
8 - 21.0" / 533.4 mm above water torpedoes

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

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 34,795 shp / 25,957 Kw = 33.00 kts
Range 6,500nm at 15.00 kts
Bunker at max displacement = 521 tons

Complement:
147 - 192

Cost:
£1.050 million / $4.200 million

Distribution of weights at normal displacement:
Armament: 51 tons, 2.6 %
Armour: 14 tons, 0.7 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 14 tons, 0.7 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 880 tons, 44.5 %
Hull, fittings & equipment: 606 tons, 30.6 %
Fuel, ammunition & stores: 378 tons, 19.1 %
Miscellaneous weights: 50 tons, 2.5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
621 lbs / 282 Kg = 11.8 x 4.7 " / 120 mm shells or 0.3 torpedoes
Stability (Unstable if below 1.00): 1.31
Metacentric height 1.7 ft / 0.5 m
Roll period: 11.4 seconds
Steadiness - As gun platform (Average = 50 %): 57 %
- Recoil effect (Restricted arc if above 1.00): 0.49
Seaboat quality (Average = 1.00): 1.16

Hull form characteristics:
Hull has raised forecastle
and transom stern
Block coefficient: 0.415
Length to Beam Ratio: 10.57 : 1
'Natural speed' for length: 22.10 kts
Power going to wave formation at top speed: 65 %
Trim (Max stability = 0, Max steadiness = 100): 49
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: 21.90 ft / 6.68 m
- Forecastle (30 %): 19.00 ft / 5.79 m (14.00 ft / 4.27 m aft of break)
- Mid (50 %): 14.00 ft / 4.27 m
- Quarterdeck (15 %): 14.00 ft / 4.27 m
- Stern: 14.00 ft / 4.27 m
- Average freeboard: 15.85 ft / 4.83 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 167.0 %
- Above water (accommodation/working, high = better): 87.0 %
Waterplane Area: 8,349 Square feet or 776 Square metres
Displacement factor (Displacement / loading): 79 %
Structure weight / hull surface area: 36 lbs/sq ft or 175 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.50
- Longitudinal: 2.00
- Overall: 0.57
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is cramped

1945 Modernization -
Reengined with additional bunkerage
Upgrade main armament to 4.72" Twin Automatics (2 mounts removed)
Upgrade 40mm to 57mm
Addition of Radar, Sonar, DC throwers, etc.

7

Tuesday, January 29th 2019, 5:40am

Switching from five singles to three twins will save a lot of deck space while adding a gun, that seems like a very worthwhile refit to me.

8

Tuesday, January 29th 2019, 9:49am

Gets my thumbs up!

9

Saturday, February 2nd 2019, 9:36pm



Revised graphic for the RAN 1500t type, more in line with the commonwealth design style of the late 20s, early 30s.

10

Sunday, February 3rd 2019, 6:50am

Is her hull break that far forward in the SS file?

11

Sunday, February 3rd 2019, 10:57am

The break should be about 111ft by wl length, the forecastle being 30% in the report.
Actually I think that is a poor sim artefact, Foxy should have had a typical 15-20% forecastle and then added the 10% as the midbreak, otherwise from the report it looks like the fore gun would be some 100ft from the bows!

12

Sunday, February 3rd 2019, 6:47pm

Yeah, I think it's a goof on Foxy's part, but it's a long-standing and consistent one at this point. Despite all his graphics showing the more traditional midships hull break, all his destroyers are simmed the same way, and as I interpret it, that dictates the break is forward of the main gun. His graphics also had late 30s-40s RN DD superstructures on everything, which i revised to more closely match historical late 20s designs.

This seemed the most elegant solution, and it'll give the RAN destroyers some visual character, if nothing else.

13

Monday, February 4th 2019, 2:07am

I get the character issue and I agree it makes them look unique. However I noticed you have used some of my own "parts" for the drawing with perhaps not as much understanding of what's actually drawn. The most obvious to me is the splinter shield deck aft of B turret, on Atlantean destroyers of the area it protrudes out over the next deck below and is flush to the hull hence the "X" bracing support. Later Atlantean destroyers (though I have no current drawings posted to show it) have this area plated over so its a more sheltered area. Given what the hull would look like aft of the break you either need another protruding deck below the first with another X bracing support or one very tall support. That said everything else looks quite spiffy to me.

14

Monday, February 4th 2019, 7:25am

I actually did consider that, and was thinking that the upper deckhouse in question was narrower than the deck section protruding aft from the hull break, which would be closer to the full width of the hull.

I've got a couple of huge files with parts and inspiration drawn from a lot of people who've drawn in the same/similar style and scale, and I don't always remember where I pulled them from originally at this point. I try and do enough work to make things as much original work as anything else, but i'll admit i'm powering through a lot of stuff since i'm at a point where i'm ready to move forward with Oz's reports, it's just a matter of figuring out exactly what's being built, and a large part of that process (for me) is having an idea on how the designs work visually, especially when it comes to refits. I'm mostly trying to get the basic layouts down so i can get the industrial reports moving forward, and worrying about properly Oz-ifying them when I'm less behind on all that. A lot of the things I'm used to doing to "Canadian-ify" a design don't really apply to Oz, and it's throwing me off a bit.

15

Sunday, February 17th 2019, 9:54pm

Still debating the best approach for the DD modernizations, but I'm leaning towards the more expensive option for the additional range they get, among other benefits.

In the meantime, working on refit options for the Auckland class light cruisers. First is a barebones life extension with basic AA and electronics upgrades, second is a more elaborate reengining and replaces the main armament with Canadian automatic 7.5" twin mounts from the PEI

Quoted

Auckland, Australia Patrol Cruiser laid down 1931

Displacement:
5,752 t light; 5,999 t standard; 7,390 t normal; 8,502 t full load

Dimensions: Length overall / water x beam x draught
561.19 ft / 550.00 ft x 55.00 ft x 19.00 ft (normal load)
171.05 m / 167.64 m x 16.76 m x 5.79 m

Armament:
9 - 6.00" / 152 mm guns (3x3 guns), 108.00lbs / 48.99kg shells, 1931 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
4 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1945 Model
Automatic rapid fire guns in deck mounts with hoists
on side, evenly spread, all raised mounts
6 - 2.24" / 57.0 mm guns (3x2 guns), 5.65lbs / 2.56kg shells, 1945 Model
Automatic rapid fire guns in deck mounts with hoists
on side, evenly spread
20 - 0.79" / 20.0 mm guns (10x2 guns), 0.24lbs / 0.11kg shells, 1931 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 1,139 lbs / 517 kg
Shells per gun, main battery: 150
12 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2.90" / 74 mm 350.00 ft / 106.68 m 9.00 ft / 2.74 m
Ends: Unarmoured
Main Belt covers 98 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.90" / 74 mm 1.20" / 30 mm 2.00" / 51 mm
2nd: 1.20" / 30 mm - -

- Armour deck: 1.20" / 30 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 60,885 shp / 45,420 Kw = 32.00 kts
Range 14,000nm at 15.00 kts
Bunker at max displacement = 2,502 tons

Complement:
398 - 518

Cost:
£2.527 million / $10.110 million

Distribution of weights at normal displacement:
Armament: 146 tons, 2.0 %
Armour: 975 tons, 13.2 %
- Belts: 380 tons, 5.1 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 150 tons, 2.0 %
- Armour Deck: 445 tons, 6.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 1,821 tons, 24.6 %
Hull, fittings & equipment: 2,785 tons, 37.7 %
Fuel, ammunition & stores: 1,637 tons, 22.2 %
Miscellaneous weights: 25 tons, 0.3 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
9,329 lbs / 4,232 Kg = 86.4 x 6.0 " / 152 mm shells or 1.4 torpedoes
Stability (Unstable if below 1.00): 1.22
Metacentric height 2.9 ft / 0.9 m
Roll period: 13.5 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.44
Seaboat quality (Average = 1.00): 1.22

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.450
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 26.93 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 57
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 24.00 ft / 7.32 m
- Forecastle (30 %): 20.00 ft / 6.10 m
- Mid (50 %): 19.00 ft / 5.79 m
- Quarterdeck (20 %): 17.00 ft / 5.18 m
- Stern: 17.00 ft / 5.18 m
- Average freeboard: 19.18 ft / 5.85 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 96.0 %
- Above water (accommodation/working, high = better): 129.6 %
Waterplane Area: 20,044 Square feet or 1,862 Square metres
Displacement factor (Displacement / loading): 127 %
Structure weight / hull surface area: 85 lbs/sq ft or 414 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.85
- Longitudinal: 1.48
- Overall: 0.90
Caution: Hull subject to strain in open-sea
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

1945 Modernization -
Secondary armament upgraded to 4" automatics
Upgrade 40mm to 57mm
Addition of Radar, Sonar, DC throwers, etc.


Quoted

Auckland, Australia Patrol Cruiser laid down 1931 (Engine 1945)

Displacement:
5,800 t light; 6,099 t standard; 7,317 t normal; 8,292 t full load

Dimensions: Length overall / water x beam x draught
561.19 ft / 550.00 ft x 55.00 ft x 19.00 ft (normal load)
171.05 m / 167.64 m x 16.76 m x 5.79 m

Armament:
6 - 7.50" / 191 mm guns (3x2 guns), 210.94lbs / 95.68kg shells, 1945 Model
Automatic rapid fire guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
8 - 4.70" / 119 mm guns (4x2 guns), 51.91lbs / 23.55kg shells, 1945 Model
Automatic rapid fire guns in deck mounts with hoists
on side, evenly spread, 2 raised mounts
6 - 2.24" / 57.0 mm guns (3x2 guns), 5.65lbs / 2.56kg shells, 1945 Model
Automatic rapid fire guns in deck mounts with hoists
on side, evenly spread
20 - 0.79" / 20.0 mm guns (10x2 guns), 0.24lbs / 0.11kg shells, 1931 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 1,720 lbs / 780 kg
Shells per gun, main battery: 150
12 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2.90" / 74 mm 350.00 ft / 106.68 m 9.00 ft / 2.74 m
Ends: Unarmoured
Main Belt covers 98 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.90" / 74 mm 1.20" / 30 mm 2.00" / 51 mm
2nd: 1.20" / 30 mm - -

- Armour deck: 1.20" / 30 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 60,378 shp / 45,042 Kw = 32.00 kts
Range 14,000nm at 15.00 kts
Bunker at max displacement = 2,193 tons

Complement:
395 - 514

Cost:
£2.762 million / $11.049 million

Distribution of weights at normal displacement:
Armament: 258 tons, 3.5 %
Armour: 991 tons, 13.5 %
- Belts: 380 tons, 5.2 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 167 tons, 2.3 %
- Armour Deck: 443 tons, 6.1 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 1,525 tons, 20.8 %
Hull, fittings & equipment: 2,982 tons, 40.7 %
Fuel, ammunition & stores: 1,517 tons, 20.7 %
Miscellaneous weights: 45 tons, 0.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
8,941 lbs / 4,056 Kg = 42.4 x 7.5 " / 191 mm shells or 1.4 torpedoes
Stability (Unstable if below 1.00): 1.13
Metacentric height 2.6 ft / 0.8 m
Roll period: 14.4 seconds
Steadiness - As gun platform (Average = 50 %): 68 %
- Recoil effect (Restricted arc if above 1.00): 0.69
Seaboat quality (Average = 1.00): 1.18

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.446
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 26.95 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 57
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 24.00 ft / 7.32 m
- Forecastle (30 %): 20.00 ft / 6.10 m
- Mid (50 %): 19.00 ft / 5.79 m
- Quarterdeck (20 %): 17.00 ft / 5.18 m
- Stern: 17.00 ft / 5.18 m
- Average freeboard: 19.18 ft / 5.85 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 95.5 %
- Above water (accommodation/working, high = better): 130.2 %
Waterplane Area: 19,970 Square feet or 1,855 Square metres
Displacement factor (Displacement / loading): 119 %
Structure weight / hull surface area: 91 lbs/sq ft or 445 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.84
- Longitudinal: 1.54
- Overall: 0.90
Caution: Hull subject to strain in open-sea
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent

1945 Modernization -
Reengined with additional bunkerage
Upgrade main armament to 7.5" Twin Automatics
Secondary armament upgraded to 4.7" automatics
Upgrade 40mm to 57mm
Addition of Radar, Sonar, DC throwers, etc.

16

Wednesday, February 20th 2019, 6:46am


17

Monday, March 4th 2019, 4:34am

Based on the RCN Provider class -
Ayer's Rock
Kokerbin Rock

Ayer's Rock class, Australian Fleet Auxilliary laid down 1946

Displacement:
14,000 t light; 14,487 t standard; 21,640 t normal; 27,362 t full load

Dimensions: Length overall / water x beam x draught
560.00 ft / 560.00 ft x 80.00 ft x 30.00 ft (normal load)
170.69 m / 170.69 m x 24.38 m x 9.14 m

Armament:
4 - 4.70" / 119 mm guns (2x2 guns), 51.91lbs / 23.55kg shells, 1946 Model
Automatic rapid fire guns in deck mounts with hoists
on centreline ends, evenly spread, all raised mounts
8 - 2.24" / 57.0 mm guns (4x2 guns), 5.65lbs / 2.56kg shells, 1946 Model
Anti-aircraft guns in deck mounts with hoists
on side, all amidships
8 - 0.79" / 20.0 mm guns (4x2 guns), 0.24lbs / 0.11kg shells, 1946 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 255 lbs / 116 kg
Shells per gun, main battery: 350

Armour:
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm 0.50" / 13 mm 0.50" / 13 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 16,052 shp / 11,975 Kw = 18.00 kts
Range 42,475nm at 15.00 kts
Bunker at max displacement = 12,875 tons

Complement:
891 - 1,159

Cost:
£4.093 million / $16.373 million

Distribution of weights at normal displacement:
Armament: 37 tons, 0.2 %
Armour: 9 tons, 0.0 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 9 tons, 0.0 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 401 tons, 1.9 %
Hull, fittings & equipment: 4,879 tons, 22.5 %
Fuel, ammunition & stores: 7,639 tons, 35.3 %
Miscellaneous weights: 8,675 tons, 40.1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
38,933 lbs / 17,660 Kg = 750.0 x 4.7 " / 119 mm shells or 4.6 torpedoes
Stability (Unstable if below 1.00): 1.16
Metacentric height 4.7 ft / 1.4 m
Roll period: 15.5 seconds
Steadiness - As gun platform (Average = 50 %): 37 %
- Recoil effect (Restricted arc if above 1.00): 0.02
Seaboat quality (Average = 1.00): 1.46

Hull form characteristics:
Hull has raised forecastle, raised quarterdeck
Block coefficient: 0.564
Length to Beam Ratio: 7.00 : 1
'Natural speed' for length: 23.66 kts
Power going to wave formation at top speed: 35 %
Trim (Max stability = 0, Max steadiness = 100): 19
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: 28.00 ft / 8.53 m
- Forecastle (20 %): 26.00 ft / 7.92 m (18.00 ft / 5.49 m aft of break)
- Mid (50 %): 18.00 ft / 5.49 m
- Quarterdeck (15 %): 26.00 ft / 7.92 m (18.00 ft / 5.49 m before break)
- Stern: 26.00 ft / 7.92 m
- Average freeboard: 20.96 ft / 6.39 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 52.1 %
- Above water (accommodation/working, high = better): 121.8 %
Waterplane Area: 31,665 Square feet or 2,942 Square metres
Displacement factor (Displacement / loading): 221 %
Structure weight / hull surface area: 100 lbs/sq ft or 490 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.58
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Good seaboat, rides out heavy weather easily

Built to Mercantile standards

18

Friday, April 12th 2019, 7:35pm

Good stuff!

Wouldn't replacing two single 4.7" with two twin 4.7" automatics forward on the Dauntless class cause weight issues? How about dropping the B guns and replacing them with more ASW and AA equipment?

Is there a reason for reintroducing the 7.5" guns back into the RAN on the Aucklands? How about 6" twin automatics? Saves you some weight especially with the heavier secondaries and maybe allows for more AA guns and equipment.