WesWorld

One will be built as an experimental unit in 1935. Upper belt armor simulates armored torpedo doors.


Pic is one on the bottom:
http://i2.photobucket.com/albums/y22/ReneJr/CVL.gif
Launceston class, Australia Torpedo Cruiser laid down 1935

Displacement:
3,950 t light; 4,141 t standard; 4,810 t normal; 5,346 t full load

Dimensions: Length overall / water x beam x draught
495.15 ft / 490.00 ft x 49.00 ft x 15.90 ft (normal load)
150.92 m / 149.35 m x 14.94 m x 4.85 m

Armament:
12 - 4.70" / 119 mm guns (4x3 guns), 51.91lbs / 23.55kg shells, 1935 Model
Breech loading guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
24 - 1.57" / 40.0 mm guns (6x4 guns), 1.95lbs / 0.89kg shells, 1935 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
20 - 0.79" / 20.0 mm guns (10x2 guns), 0.24lbs / 0.11kg shells, 1935 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 675 lbs / 306 kg
Shells per gun, main battery: 240
18 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Ends: Unarmoured
Upper: 1.20" / 30 mm 90.00 ft / 27.43 m 4.00 ft / 1.22 m

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

- Armour deck: 1.20" / 30 mm, Conning tower: 1.20" / 30 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 48,429 shp / 36,128 Kw = 32.00 kts
Range 9,000nm at 15.00 kts
Bunker at max displacement = 1,205 tons

Complement:
288 - 375

Cost:
£2.045 million / $8.180 million

Distribution of weights at normal displacement:
Armament: 84 tons, 1.8 %
Armour: 409 tons, 8.5 %
- Belts: 24 tons, 0.5 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 27 tons, 0.6 %
- Armour Deck: 351 tons, 7.3 %
- Conning Tower: 7 tons, 0.2 %
Machinery: 1,376 tons, 28.6 %
Hull, fittings & equipment: 1,991 tons, 41.4 %
Fuel, ammunition & stores: 860 tons, 17.9 %
Miscellaneous weights: 90 tons, 1.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
5,691 lbs / 2,582 Kg = 109.6 x 4.7 " / 119 mm shells or 1.0 torpedoes
Stability (Unstable if below 1.00): 1.20
Metacentric height 2.4 ft / 0.7 m
Roll period: 13.2 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.46
Seaboat quality (Average = 1.00): 1.25

Hull form characteristics:
Hull has low forecastle, low quarterdeck
and transom stern
Block coefficient: 0.441
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 25.45 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 56
Bow angle (Positive = bow angles forward): 9.00 degrees
Stern overhang: 2.46 ft / 0.75 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 17.00 ft / 5.18 m
- Forecastle (20 %): 17.00 ft / 5.18 m (20.00 ft / 6.10 m aft of break)
- Mid (50 %): 20.00 ft / 6.10 m
- Quarterdeck (20 %): 15.00 ft / 4.57 m (20.00 ft / 6.10 m before break)
- Stern: 15.00 ft / 4.57 m
- Average freeboard: 18.40 ft / 5.61 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 109.4 %
- Above water (accommodation/working, high = better): 101.0 %
Waterplane Area: 15,791 Square feet or 1,467 Square metres
Displacement factor (Displacement / loading): 123 %
Structure weight / hull surface area: 74 lbs/sq ft or 363 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.83
- Longitudinal: 1.85
- 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 adequate
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

A nice design, looks good. A bit like a modern version of the Japanese rebuild of the old cruiser Kitakami in 1941.

I like it.

Looks vulnerable but it's powerful. More speed might be good for escaping but on thw whole it seems to follow ideas I've had for Argentina.

Number of guns and torpedoes seems high for her size, compared to, say, Dido or Atlanta. Also seems fairly vulnerable to aircraft, given the lack of heavy AA.

Sounds like something a main DP armament could solve.

That would help with the lack of heavy AA, but wouldn't do anything for the seemingly over-armed nature of the ship.

Comparing her to TROMPs sistership as re-build in the UK as AA-cruiser might help. She should be similar in size. IIRC, she carrierd 10 4" guns in twins and 8 40mm Hazemeyers....but no torpedos and little other guns.

Keep in mind - the more guns, the more crews and the more crew compartments you need. I´m pretty sure SS doesn´t sim that well...... Gavon? Walter?

Quoted

Originally posted by HoOmAn


Keep in mind - the more guns, the more crews and the more crew compartments you need. I´m pretty sure SS doesn´t sim that well...... Gavon? Walter?

I'm not quite sure. Living space seems to be derived from the amount of freeboard available and the amount of deckspace.

Really I've got to question the rationale behind such a vessel. It can engage at a maximum of about 10.000yds with torpedoes and guns, it probably won't hit with the torpedoes at such a range though. Its extremely cramped and not very suitable for the oceanic warships that Australia needs. The triple 4.7" mounts will most likely give severe problems, if they fit onto that beam....