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London class, UK Aust cruiser laid down 1929

Displacement:

12,488 t light; 13,000 t standard; 14,313 t normal; 15,307 t full load

Loading submergence 976 tons/feet

Dimensions:

677.13 ft x 68.00 ft x 17.00 ft (normal load)

206.39 m x 20.73 m x 5.18 m

Armament:

9 - 8.00" / 203 mm guns (3 Main turrets x 3 guns, 1 superfiring turret)

8 - 4.50" / 114 mm guns

15 - 1.56" / 40 mm AA guns

24 - 0.80" / 20 mm guns

Weight of broadside 2,703 lbs / 1,226 kg

8 - 21.0" / 533.4 mm above water torpedoes

Armour:

Belt 7.60" / 193 mm, ends unarmoured

Belts cover 90 % of normal area

Main turrets 8.00" / 203 mm

Armour deck 1.50" / 38 mm, Conning tower 8.00" / 203 mm

Machinery:

Oil fired boilers, steam turbines,

Geared drive, 4 shafts, 90,634 shp / 67,613 Kw = 30.63 kts

Range 18,200nm at 10.00 kts

over power at 107,978 shp / 80,551Kw=32kts

Complement:

654 - 850

Cost:

£4.442 million / $17.770 million

Distribution of weights at normal displacement:

Armament: 338 tons, 2.4 %

Armour: 3,231 tons, 22.6 %

Belts: 1,221 tons, 8.5 %, Armament: 961 tons, 6.7 %, Armour Deck: 948 tons, 6.6 %

Conning Tower: 102 tons, 0.7 %, Torpedo bulkhead: 0 tons, 0.0 %

Machinery: 2,784 tons, 19.4 %

Hull, fittings & equipment: 6,135 tons, 42.9 %

Fuel, ammunition & stores: 1,825 tons, 12.8 %

Miscellaneous weights: 0 tons, 0.0 %

Metacentric height 2.8

Remarks:

Hull space for machinery, storage & compartmentation is excellent

Room for accommodation & workspaces is excellent

Ship has slow, easy roll, a good, steady gun platform

Estimated overall survivability and seakeeping ability:

Relative margin of stability: 1.00

Shellfire needed to sink: 22,462 lbs / 10,189 Kg = 87.7 x 8.0 " / 203 mm shells

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

Torpedoes needed to sink: 2.4

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

Relative steadiness as gun platform: 82 %

(Average = 50 %)

Relative rocking effect from firing to beam: 0.66

Relative quality as seaboat: 1.18

Hull form characteristics:

Block coefficient: 0.640

Sharpness coefficient: 0.38

Hull speed coefficient 'M': 8.53

'Natural speed' for length: 26.02 kts

Power going to wave formation at top speed: 53 %

Trim: 70

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

Estimated hull characteristics & strength:

Underwater volume absorbed by magazines and engineering spaces: 81.9 %

Relative accommodation and working space: 201.3 %

(Average = 100%)

Displacement factor: 124 %

(Displacement relative to loading factors)

Relative cross-sectional hull strength: 0.99

(Structure weight / hull surface area: 120 lbs / square foot or 587 Kg / square metre)

Relative longitudinal hull strength: 1.08

(for 23.00 ft / 7.01 m average freeboard, freeboard adjustment 6.73 ft)

Relative composite hull strength: 1.00

Kent Ballarat class, uk Aust Cruiser laid down 1930

Displacement:

12,426 t light; 13,000 t standard; 14,201 t normal; 15,105 t full load

Loading submergence 984 tons/feet

Dimensions:

644.20 ft x 68.50 ft x 16.30 ft (normal load)

196.35 m x 20.88 m x 4.97 m

Armament:

12 - 8.00" / 203 mm guns (3 Main turrets x 4 guns, 1 superfiring turret)

8 - 4.50" / 114 mm guns (4 2nd turrets x 2 guns)

20 - 1.56" / 40 mm AA guns

25 - 0.80" / 20 mm guns

Weight of broadside 3,481 lbs / 1,579 kg

8 - 21.0" / 533.4 mm above water torpedoes

Armour:

Belt 7.60" / 193 mm, ends unarmoured

Belts cover 90 % of normal area

Main turrets 8.00" / 203 mm

Armour deck 1.50" / 38 mm, Conning tower 8.00" / 203 mm

Machinery:

Oil fired boilers, steam turbines,

Geared drive, 4 shafts, 87,518 shp / 65,289 Kw = 30.00 kts

Range 7,000nm at 15.00 kts

Over power is at 113,675shp/ 84,802Kw =32kts

Complement:

650 - 845

Cost:

£4.900 million / $19.599 million

Distribution of weights at normal displacement:

Armament: 435 tons, 3.1 %

Armour: 3,213 tons, 22.6 %

Belts: 1,173 tons, 8.3 %, Armament: 983 tons, 6.9 %, Armour Deck: 956 tons, 6.7 %

Conning Tower: 101 tons, 0.7 %, Torpedo bulkhead: 0 tons, 0.0 %

Machinery: 2,652 tons, 18.7 %

Hull, fittings & equipment: 6,125 tons, 43.1 %

Fuel, ammunition & stores: 1,775 tons, 12.5 %

Miscellaneous weights: 0 tons, 0.0 %

Metacentric height 2.8

Remarks:

Hull space for machinery, storage & compartmentation is adequate

Room for accommodation & workspaces is excellent

Ship has slow, easy roll, a good, steady gun platform

Estimated overall survivability and seakeeping ability:

Relative margin of stability: 1.00

Shellfire needed to sink: 20,630 lbs / 9,357 Kg = 80.6 x 8.0 " / 203 mm shells

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

Torpedoes needed to sink: 4.3

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

Relative steadiness as gun platform: 73 %

(Average = 50 %)

Relative rocking effect from firing to beam: 0.71

Relative quality as seaboat: 1.00

Hull form characteristics:

Block coefficient: 0.691

Sharpness coefficient: 0.40

Hull speed coefficient 'M': 8.14

'Natural speed' for length: 25.38 kts

Power going to wave formation at top speed: 55 %

Trim: 73

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

Estimated hull characteristics & strength:

Underwater volume absorbed by magazines and engineering spaces: 84.8 %

Relative accommodation and working space: 188.2 %

(Average = 100%)

Displacement factor: 118 %

(Displacement relative to loading factors)

Relative cross-sectional hull strength: 1.00

(Structure weight / hull surface area: 124 lbs / square foot or 608 Kg / square metre)

Relative longitudinal hull strength: 1.04

(for 21.30 ft / 6.49 m average freeboard, freeboard adjustment 5.06 ft)

Relative composite hull strength: 1.00

both ships are desing for 30kts but when built can make 32kts and just come in on the 13,000ton mark. for treaty Cruisers

Displacement:

12,488 t light; 13,000 t standard; 14,313 t normal; 15,307 t full load

Loading submergence 976 tons/feet

Dimensions:

677.13 ft x 68.00 ft x 17.00 ft (normal load)

206.39 m x 20.73 m x 5.18 m

Armament:

9 - 8.00" / 203 mm guns (3 Main turrets x 3 guns, 1 superfiring turret)

8 - 4.50" / 114 mm guns

15 - 1.56" / 40 mm AA guns

24 - 0.80" / 20 mm guns

Weight of broadside 2,703 lbs / 1,226 kg

8 - 21.0" / 533.4 mm above water torpedoes

Armour:

Belt 7.60" / 193 mm, ends unarmoured

Belts cover 90 % of normal area

Main turrets 8.00" / 203 mm

Armour deck 1.50" / 38 mm, Conning tower 8.00" / 203 mm

Machinery:

Oil fired boilers, steam turbines,

Geared drive, 4 shafts, 90,634 shp / 67,613 Kw = 30.63 kts

Range 18,200nm at 10.00 kts

over power at 107,978 shp / 80,551Kw=32kts

Complement:

654 - 850

Cost:

£4.442 million / $17.770 million

Distribution of weights at normal displacement:

Armament: 338 tons, 2.4 %

Armour: 3,231 tons, 22.6 %

Belts: 1,221 tons, 8.5 %, Armament: 961 tons, 6.7 %, Armour Deck: 948 tons, 6.6 %

Conning Tower: 102 tons, 0.7 %, Torpedo bulkhead: 0 tons, 0.0 %

Machinery: 2,784 tons, 19.4 %

Hull, fittings & equipment: 6,135 tons, 42.9 %

Fuel, ammunition & stores: 1,825 tons, 12.8 %

Miscellaneous weights: 0 tons, 0.0 %

Metacentric height 2.8

Remarks:

Hull space for machinery, storage & compartmentation is excellent

Room for accommodation & workspaces is excellent

Ship has slow, easy roll, a good, steady gun platform

Estimated overall survivability and seakeeping ability:

Relative margin of stability: 1.00

Shellfire needed to sink: 22,462 lbs / 10,189 Kg = 87.7 x 8.0 " / 203 mm shells

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

Torpedoes needed to sink: 2.4

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

Relative steadiness as gun platform: 82 %

(Average = 50 %)

Relative rocking effect from firing to beam: 0.66

Relative quality as seaboat: 1.18

Hull form characteristics:

Block coefficient: 0.640

Sharpness coefficient: 0.38

Hull speed coefficient 'M': 8.53

'Natural speed' for length: 26.02 kts

Power going to wave formation at top speed: 53 %

Trim: 70

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

Estimated hull characteristics & strength:

Underwater volume absorbed by magazines and engineering spaces: 81.9 %

Relative accommodation and working space: 201.3 %

(Average = 100%)

Displacement factor: 124 %

(Displacement relative to loading factors)

Relative cross-sectional hull strength: 0.99

(Structure weight / hull surface area: 120 lbs / square foot or 587 Kg / square metre)

Relative longitudinal hull strength: 1.08

(for 23.00 ft / 7.01 m average freeboard, freeboard adjustment 6.73 ft)

Relative composite hull strength: 1.00

Kent Ballarat class, uk Aust Cruiser laid down 1930

Displacement:

12,426 t light; 13,000 t standard; 14,201 t normal; 15,105 t full load

Loading submergence 984 tons/feet

Dimensions:

644.20 ft x 68.50 ft x 16.30 ft (normal load)

196.35 m x 20.88 m x 4.97 m

Armament:

12 - 8.00" / 203 mm guns (3 Main turrets x 4 guns, 1 superfiring turret)

8 - 4.50" / 114 mm guns (4 2nd turrets x 2 guns)

20 - 1.56" / 40 mm AA guns

25 - 0.80" / 20 mm guns

Weight of broadside 3,481 lbs / 1,579 kg

8 - 21.0" / 533.4 mm above water torpedoes

Armour:

Belt 7.60" / 193 mm, ends unarmoured

Belts cover 90 % of normal area

Main turrets 8.00" / 203 mm

Armour deck 1.50" / 38 mm, Conning tower 8.00" / 203 mm

Machinery:

Oil fired boilers, steam turbines,

Geared drive, 4 shafts, 87,518 shp / 65,289 Kw = 30.00 kts

Range 7,000nm at 15.00 kts

Over power is at 113,675shp/ 84,802Kw =32kts

Complement:

650 - 845

Cost:

£4.900 million / $19.599 million

Distribution of weights at normal displacement:

Armament: 435 tons, 3.1 %

Armour: 3,213 tons, 22.6 %

Belts: 1,173 tons, 8.3 %, Armament: 983 tons, 6.9 %, Armour Deck: 956 tons, 6.7 %

Conning Tower: 101 tons, 0.7 %, Torpedo bulkhead: 0 tons, 0.0 %

Machinery: 2,652 tons, 18.7 %

Hull, fittings & equipment: 6,125 tons, 43.1 %

Fuel, ammunition & stores: 1,775 tons, 12.5 %

Miscellaneous weights: 0 tons, 0.0 %

Metacentric height 2.8

Remarks:

Hull space for machinery, storage & compartmentation is adequate

Room for accommodation & workspaces is excellent

Ship has slow, easy roll, a good, steady gun platform

Estimated overall survivability and seakeeping ability:

Relative margin of stability: 1.00

Shellfire needed to sink: 20,630 lbs / 9,357 Kg = 80.6 x 8.0 " / 203 mm shells

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

Torpedoes needed to sink: 4.3

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

Relative steadiness as gun platform: 73 %

(Average = 50 %)

Relative rocking effect from firing to beam: 0.71

Relative quality as seaboat: 1.00

Hull form characteristics:

Block coefficient: 0.691

Sharpness coefficient: 0.40

Hull speed coefficient 'M': 8.14

'Natural speed' for length: 25.38 kts

Power going to wave formation at top speed: 55 %

Trim: 73

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

Estimated hull characteristics & strength:

Underwater volume absorbed by magazines and engineering spaces: 84.8 %

Relative accommodation and working space: 188.2 %

(Average = 100%)

Displacement factor: 118 %

(Displacement relative to loading factors)

Relative cross-sectional hull strength: 1.00

(Structure weight / hull surface area: 124 lbs / square foot or 608 Kg / square metre)

Relative longitudinal hull strength: 1.04

(for 21.30 ft / 6.49 m average freeboard, freeboard adjustment 5.06 ft)

Relative composite hull strength: 1.00

both ships are desing for 30kts but when built can make 32kts and just come in on the 13,000ton mark. for treaty Cruisers

1) aircaft just dont like them plus there more at home on a riader and you have to stop to pick them up. The RAN is working on radar to replace them i hope by the Mid to late1930s to have some ships with sets up and runing a lot of R&D time is going to that.

2) As to why the the kent have 30% over power rate thats just the way the program works.

3) as to why quads if im crossing someones T well 8 rounds landing then 4 and 12 to 8 is even better.

2) As to why the the kent have 30% over power rate thats just the way the program works.

3) as to why quads if im crossing someones T well 8 rounds landing then 4 and 12 to 8 is even better.

Hi 17 inc

I like them both but especially the 12*21 one

ok seakeeping is squeezed, but then you are, more likely to fight in good weather that in the Antarctic.

why don't you show us a 1921 design?

and I like the quads, they are about your only chance to get 12 main gun on a 13.000 t hull (how on earth did you manage to hit that figure so precisely?

cheers

Bernhard

I like them both but especially the 12*21 one

ok seakeeping is squeezed, but then you are, more likely to fight in good weather that in the Antarctic.

why don't you show us a 1921 design?

and I like the quads, they are about your only chance to get 12 main gun on a 13.000 t hull (how on earth did you manage to hit that figure so precisely?

cheers

Bernhard

Im planing a six by six program by strat of 1929 3 londons , two nelsons in in 1930 3 londons 3 kents and 3 kents and 4 Escapade DDs by 1931 for 12 CAs. form 1932 4 DDs s and 12 as yet named ligth cruisers form on for tot of 24 CAs and CLS by 1940 . in the ALT time line AU manpower is a lot lager at near 25 milion pepole so yes i can bulid more the two 13,000 ton CAs

Not to burst anyones bubble here but if I were Austrailia i would mix it up a bit. I would build ships with compromise as the catch phrase. Several large, several medium and several small cruisers to keep numbers and individual strength up. A modified design with 3 triple 8" turrets would still be impressive and reduce the tonnage somewhat. I would personally build 2 super kents, 3 kents, and then consentrate on light cruisers.

## Quoted

Fearsome ships indeed. However Australia can only possess 2 of each class. Why not have 6 10,000t CAs to give more flexibility for only a small loss in power.

That's what France has planned for her 60,000 tons of CAs, a series of two-ship classes of 10,000 ton CAs. With such a far-flung empire, that's the only way to go.

Even if the Kent and London were laid down as they were historically in Brittain, Australia might have some problems with the number of slips available to them. This might cause delays with laying down the Australian versions of the Kent and London and they would be simmed using the date when they are laid down.

So while the British Kent would be simmed with 1924 and the British London with 1926, the Australian Kent would be simmed using 1930 and the Australian London would be simmed using 1929.

Walter

## Quoted

So while the British Kent would be simmed with 1924 and the British London with 1926, the Australian Kent would be simmed using 1930 and the Australian London would be simmed using 1929.

I disagree. That would involve a redesign, at least of the engines IMHO. Otherwise the latter ships of the same class would be simmed with their building date rather than the 1st of class one's.

cheers

Bernhard

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