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Royal Australian Navy 1944 Design Light Cruiser by Tzoli Royal Australian Navy 1944 Design Light Cruiser by Tzoli
This cruiser proposal dates back to 1943/44 to an imperial defence plan for Australia:

“MP1049/5 2026/3/516 Cruiser and Destroyer Building Program”.
The file begins in mid 1943, discussing the advisability of building cruisers and destroyers in Australia to replace war losses and the ageing remaining ships, and the file ends with the dispatch of the RA Eng and Director ordinance from the Naval Boards Melbourne office being ordered to London from June-Aug 1944 to consider current vessels under construction in Britain.
Prior to this mission, the ACNB set out what it thought were the war lessons.
A - Air Power – neither side seeks surface action in daylight without air support, so there  are more night actions than day, and all ships require maximum AA fire power and ability to stand up to bomb and aerial torpedo damage.
B - The destructive power of the modern torpedo.
C - The ever increasing efficiency of radar.
D - The devastating effect of high volume of fire at night ranges from medium calibre guns.
 
and then the desirable features of an RAN future cruiser given the war lessons.
A - Main armament dual purpose guns. The 5.25in gun appears to be the most satisfactory calibre for HA/LA
   (with “at present” added in pencil)
B - Secondary armament guns more numerous than in present design 40mm guns are required in addition to 20mm.
C - Side armour and deck armour.
D - Improved under water protection. Large compartments should be partitioned by water tight bulkheads,
E - Maximum speed 30-32 knots. Higher speeds are not considered necessary.
F - Large endurance.

The paper then considers a number of British designs, improved Southampton, Fiji, Dido.
It selects the Dido as the most suitable based on its HA/LA armament, but with these weaknesses.
A - Endurance much too small. (stated at 7500miles econ, 1,700 miles full speed)
B - Too vulnerable to under water attack.
C - Insufficient HA firepower abaft the beam.
D - Insufficient medium and short range AA armament.
E - Inability to engage more than two AA targets in primary control with main armament.
 
They then outline a cruiser the authors think would be perfect for the RAN post war.
Speed – 30 knots
Endurance – 10-12,000 miles at economical speed.
Gun armament – 12-15 5.25 HA/LA, 12 or more 40mm bofors, 12 or more 20mm.
Protection – Side and deck armour, improved watertight subdivision.
Displacement – 8-9000 tons
Length 550-570ft  Beam 60-65ft 
No aircraft.
 
The author proposes no torpedoes, but the paper is edited by someone who finds them essential, and points out that doctrine is to “fix by gunfire, and sink by torpedo”.
They propose the main slipway at Cockatoo Island built up from its present 450ft to 600ft. All designs, plans, skilled technical personnel etc to be sourced from GB.
Imports would include:  80% of all steel (the right grades were not made in Australia – this was cited by the minister in the 1930’s as a reason not to order an Australian Leander).
All armour plate. All armament, All fire control. 80% of auxiliary machinery. Forgings for main turbines. 60% of electrical cable. 80% of electrical equipment. Anchor cables.
 
To be laid down in 1944 for completion in 1948, and to be followed by another 5 similar ships from 1944-1953, replacing entirely the wartime losses and pre war ships.

The design the following characteristics:
Dimensions: 167,64 (wl) 173,74 (oa) x 19,8m 
Displacement: 9.000tons (standard)
Armour: 51mm Deck, 89mm Belt
Engines: 4 shafts, Parson Steam Turbines, Unknown shp probably around 80.000shp
Speed: 56km/h (30knots)
Range: not sure but probably 22.000km (12.000nm)
Armaments: 
4x3 5,25"/50 (133mm) Mark IV Guns
6x2 40mm/56 Bofors Mk X AA Guns or 5-6x4 40mm/39 Pom-Pom Mark VIII AA guns,
8x2 20mm/70 Oerlikon AA Guns
2x4 533mm Torpedo Tubes

I've based my drawing on the Crown Colony class light cruiser and the N2 design light cruiser.
i.imgur.com/5C7wGMk.jpg
Add a Comment:
 
:iconsharlin:
sharlin Featured By Owner Sep 21, 2018
Very nice design but those funnels need to be more widely spread, if only from a pure asthetic sense :D
Reply
:iconmihoshik:
MihoshiK Featured By Owner Edited Sep 16, 2018
Although I like it, I have to say that if it was based on a british design of the time, the bow definatively needs to be more straight, like that of the Crown Colony class. The Brits never went in for Clipper bows for their cruisers.


And a question. I know there were plans for a quadruple 6 inch turret for the Town class, and they actually got as far as building prototypes. Do you have any references for thsoe? I've come up empty.
Reply
:icondarkwanderer123456:
darkwanderer123456 Featured By Owner Sep 16, 2018
A sleek clipper bow would be idea for large open, heavy weather ocean like Pacific and provide it make the ship less wet forward. Not purely for aesthetic view and given that Aussie has experience with Pacific ocean so they require some changes to make fit for them navy.
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:icontzoli:
Tzoli Featured By Owner Sep 16, 2018  Hobbyist Digital Artist
The waterline and overall length was set so I have to make this kind of clipper bow. Yes British design but Australians might had involved in it's design.

No I did not come to such a drawing and it might be found in the Royal Navy or Vickers Archives
Reply
:iconmidway2009:
Midway2009 Featured By Owner Sep 15, 2018  Hobbyist Traditional Artist
She's marvelous. :salute:
Reply
:iconfrankvc:
FrankvC Featured By Owner Sep 15, 2018
Now that is finished I can write without fearing that I got it wrong xD Never heard about this design but to be fair I only know about IJN and KM ones so there is that too I find specially funny the use of triple 133s, they looked a lot like 6inch But as you said it was not a 152 gun armed cruiser that really didn’t tick any of my boxes Great work Tzoli! 
Reply
:icontzoli:
Tzoli Featured By Owner Sep 15, 2018  Hobbyist Digital Artist
The guns are of the proposed newer 5,25 ones with automatic or semi-automatic loading mechanisms
Reply
:iconeltf177:
eltf177 Featured By Owner Sep 15, 2018
I never would have guessed RAN or triple 5.25-inch. Never heard of this, thanks for sharing!
Reply
:icontzoli:
Tzoli Featured By Owner Jan 27, 2019  Hobbyist Digital Artist
Here is an official drawing of an new semi-automatic twin 5,25 gun turret:
i.imgur.com/YMt83uJ.jpg
Reply
:icondarkwanderer123456:
darkwanderer123456 Featured By Owner Sep 8, 2018
This more like mix-mashed or British designs for some foreign navies, noticed the hull and bulky upper structures.
Reply
:icontzoli:
Tzoli Featured By Owner Sep 8, 2018  Hobbyist Digital Artist
Almost correct
Reply
:iconingunina:
Ingunina Featured By Owner Sep 7, 2018
British - advanced Light Cruiser  Colony or Swiftshire class
Reply
:icontzoli:
Tzoli Featured By Owner Sep 7, 2018  Hobbyist Digital Artist
Nope but based on them
Reply
:iconjavifel:
javifel Featured By Owner Sep 6, 2018
1940 british design for a heavy cruiser? 
Reply
:icontzoli:
Tzoli Featured By Owner Sep 6, 2018  Hobbyist Digital Artist
Nope
Reply
:iconeltf177:
eltf177 Featured By Owner Sep 6, 2018
Italian with 5.3-inch DP guns?
Reply
:icontzoli:
Tzoli Featured By Owner Sep 6, 2018  Hobbyist Digital Artist
You mean 135mm guns?
Reply
:iconeltf177:
eltf177 Featured By Owner Sep 6, 2018
Yes, although they weren't DP if I recall correctly...
Reply
:icontzoli:
Tzoli Featured By Owner Sep 7, 2018  Hobbyist Digital Artist
There were turret designs which would mount these guns for high elevation fire as well
navweaps.com/Weapons/WNIT_53-4…
Reply
:iconeltf177:
eltf177 Featured By Owner Sep 7, 2018
Did not know this...
Reply
:iconingunina:
Ingunina Featured By Owner Sep 4, 2018
British - advanced Dido class?
Reply
:icontzoli:
Tzoli Featured By Owner Sep 4, 2018  Hobbyist Digital Artist
Not Dido
Reply
:icongolgotha17:
Golgotha17 Featured By Owner Sep 3, 2018
Is it some american heavy cruiser design? The arrangement of the DP guns seems very american. Something along the lines of WOWS' Buffalo, perhaps?
Reply
:icontzoli:
Tzoli Featured By Owner Sep 3, 2018  Hobbyist Digital Artist
Not american at all.
DP guns??? Where? The main guns are Dual-Purpose yes but there are no other large calibre guns and 4 triple isn't an american speciality.
Reply
:icongolgotha17:
Golgotha17 Featured By Owner Edited Sep 4, 2018
Yeah, now that I took another look at your weapon diagram, I really mistook those six Bofors guns for DP guns. So a british design, then? The main gun turrets seem to have the shape and those roof "cutouts" that i've seen on british light cruisers.
Reply
:iconuglygosling:
uglygosling Featured By Owner Aug 31, 2018
As always, it will be interesting to me to see what this design turns out to be.
Reply
:iconoboy220:
oboy220 Featured By Owner Aug 30, 2018
The funnels look suspiciously Italian. 
Reply
:icontzoli:
Tzoli Featured By Owner Aug 30, 2018  Hobbyist Digital Artist
Not italian at all
Reply
:iconoboy220:
oboy220 Featured By Owner Aug 31, 2018
American?
Reply
:icontzoli:
Tzoli Featured By Owner Sep 1, 2018  Hobbyist Digital Artist
nope
Reply
:iconoboy220:
oboy220 Featured By Owner Sep 15, 2018
I was juts dead wrong about the nationality WRONG WRONG WRONG WRONG WRONG WRONG WRONG WRONG 

Nice work ;)
Reply
:iconthelordtaxus:
TheLordTaxus Featured By Owner Aug 30, 2018
Another 5.5 or 5.25?  

Also do you know of any design variations of the USS Brooklyn class that were never built?
Reply
:icontzoli:
Tzoli Featured By Owner Aug 30, 2018  Hobbyist Digital Artist
Plenty:
forum.worldofwarships.eu/topic…

And many more is in the USN Cruiser book of Norman Friedman. Check my Excel file:
Excel Database of Warships of the World
Reply
:icondarkwanderer123456:
darkwanderer123456 Featured By Owner Aug 30, 2018
I don't found any of your excel files, just a Yamato tub bote picture.
Reply
:icontzoli:
Tzoli Featured By Owner Aug 30, 2018  Hobbyist Digital Artist
Use the Download button
Reply
:icondarkwanderer123456:
darkwanderer123456 Featured By Owner Aug 30, 2018
LUL, i got brain farted like 1m! didn't noticed the huge DOWNLOAD button on the right XD
Reply
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