WesWorld

A new ship for 1932. She is basiclly a version of my Light Cruiser with the after turrent replaced by a hangar and facilities for 9 seaplanes.


HMAS Freemantle, Australia Seaplane Cruiser laid down 1932

Displacement:
5,780 t light; 6,013 t standard; 7,390 t normal; 8,491 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 - 6.00" / 152 mm guns (2x3 guns), 108.00lbs / 48.99kg shells, 1932 Model
Breech loading guns in turrets (on barbettes)
on centreline, all forward, 1 raised mount - superfiring
8 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1932 Model
Dual purpose guns in deck mounts
on side, evenly spread, 2 raised mounts
12 - 1.57" / 40.0 mm guns (3x4 guns), 1.95lbs / 0.88kg shells, 1932 Model
Anti-aircraft guns in deck mounts
on centreline, evenly spread
20 - 0.79" / 20.0 mm guns (10x2 guns), 0.24lbs / 0.11kg shells, 1932 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 932 lbs / 423 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 = 2,479 tons

Complement:
398 - 518

Cost:
£2.508 million / $10.033 million

Distribution of weights at normal displacement:
Armament: 117 tons, 1.6 %
Armour: 943 tons, 12.8 %
- Belts: 380 tons, 5.1 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 118 tons, 1.6 %
- Armour Deck: 445 tons, 6.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 1,797 tons, 24.3 %
Hull, fittings & equipment: 2,674 tons, 36.2 %
Fuel, ammunition & stores: 1,610 tons, 21.8 %
Miscellaneous weights: 250 tons, 3.4 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
9,573 lbs / 4,342 Kg = 88.6 x 6.0 " / 152 mm shells or 1.5 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 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.33
Seaboat quality (Average = 1.00): 1.24

Hull form characteristics:
Hull has low quarterdeck
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 %): 15.00 ft / 4.57 m (19.00 ft / 5.79 m before break)
- Stern: 15.00 ft / 4.57 m
- Average freeboard: 19.08 ft / 5.82 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 95.3 %
- Above water (accommodation/working, high = better): 133.8 %
Waterplane Area: 20,044 Square feet or 1,862 Square metres
Displacement factor (Displacement / loading): 129 %
Structure weight / hull surface area: 82 lbs/sq ft or 399 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.85
- Longitudinal: 1.46
- 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

Note that you'll have to trim the displacement down a few tonnes to benefit from that 0.9 HS.

It seems to be a very ambitious amount of stuff being put in that hull - Oyodo had fewer seaplanes and a similar armament on 33% more tonnage. This might well be an issue with other seaplane cruisers we've seen, I suppose, haven't looked at them recently.

Operationally - what's the intent?

Hmm... do you think there's enough space, with just the one turret removed?

Other than that I like this ship a lot.

I think 9 aircraft is pushing things;

Similar size Götland has 6 aircraft maximum and no hangar to put them in.



If you want floatplane capability go for the historical HMAS Albatros

I see the problem, going to 1932 increases the displacement. I guess Ill stick with the older engines then, that will reduce misc tonnage to 200tons meaning less AC. I would say 5 AC plus catapult.

Her role is to be a strategic scout. During the recent pirate hunt, one factor was the lack of planes. Venganza was able to hide for nearly a month. This ship would help by providing extra scouts.

Quoted

Double decker parking?

Would that actually work?

BTW, thanks Gavin for showing the Götland. I kinda like the ship. :-)
*Checks building plans*

Quoted

It seems to be a very ambitious amount of stuff being put in that hull - Oyodo had fewer seaplanes and a similar armament on 33% more tonnage.

Speaking of the Oyodo...
I used Oyodo's data for this 1932 version of the ship. For a few moments I was thinking of adding torpedoes, like the HMAS Freemantle, but when looking at the picture, I wasn't too sure that adding torpedo launchers would work. Maybe with a deck over the launchers like some of the IJN Heavy Cruisers but in the end I decided to stick fairly close to the original data.



MKR Type 1, Japan Light Cruiser laid down 1932

Displacement:
8,114 t light; 8,421 t standard; 9,609 t normal; 10,559 t full load

Dimensions: Length overall / water x beam x draught
634.32 ft / 620.08 ft x 54.46 ft x 19.52 ft (normal load)
193.34 m / 189.00 m x 16.60 m x 5.95 m

Armament:
6 - 5.91" / 150 mm guns (2x3 guns), 105.00lbs / 47.63kg shells, 1930 Model
Quick firing guns in turrets (on barbettes)
on centreline, all forward, 1 raised mount - superfiring
8 - 4.13" / 105 mm guns (4x2 guns), 34.00lbs / 15.42kg shells, 1930 Model
Dual purpose guns in deck mounts with hoists
on side, all amidships
16 - 1.57" / 40.0 mm guns (2x8 guns), 2.00lbs / 0.91kg shells, 1923 Model
Anti-aircraft guns in deck mounts
on side, all amidships
12 - 0.98" / 25.0 mm guns (4x3 guns), 0.57lbs / 0.26kg shells, 1926 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 941 lbs / 427 kg
Shells per gun, main battery: 200

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.00" / 76 mm 455.00 ft / 138.68 m 8.86 ft / 2.70 m
Ends: Unarmoured
Main Belt covers 113 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 4.00" / 102 mm 3.00" / 76 mm 3.00" / 76 mm
2nd: 2.00" / 51 mm 1.00" / 25 mm 2.00" / 51 mm
3rd: 1.00" / 25 mm 1.00" / 25 mm -
4th: 1.00" / 25 mm 1.00" / 25 mm -

- Armour deck: 1.15" / 29 mm, Conning tower: 2.75" / 70 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 100,288 shp / 74,815 Kw = 35.00 kts
Range 10,000nm at 15.00 kts
Bunker at max displacement = 2,138 tons

Complement:
484 - 630

Cost:
£3.622 million / $14.488 million

Distribution of weights at normal displacement:
Armament: 117 tons, 1.2 %
Armour: 1,216 tons, 12.7 %
- Belts: 490 tons, 5.1 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 197 tons, 2.0 %
- Armour Deck: 503 tons, 5.2 %
- Conning Tower: 27 tons, 0.3 %
Machinery: 2,960 tons, 30.8 %
Hull, fittings & equipment: 3,620 tons, 37.7 %
Fuel, ammunition & stores: 1,495 tons, 15.6 %
Miscellaneous weights: 200 tons, 2.1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
9,206 lbs / 4,176 Kg = 89.4 x 5.9 " / 150 mm shells or 1.2 torpedoes
Stability (Unstable if below 1.00): 1.10
Metacentric height 2.4 ft / 0.7 m
Roll period: 14.8 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.37
Seaboat quality (Average = 1.00): 1.01

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.510
Length to Beam Ratio: 11.39 : 1
'Natural speed' for length: 28.11 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 69
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 2.00 ft / 0.61 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 26.25 ft / 8.00 m
- Forecastle (20 %): 18.70 ft / 5.70 m
- Mid (50 %): 18.70 ft / 5.70 m
- Quarterdeck (15 %): 18.70 ft / 5.70 m
- Stern: 16.73 ft / 5.10 m
- Average freeboard: 19.16 ft / 5.84 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 112.2 %
- Above water (accommodation/working, high = better): 173.9 %
Waterplane Area: 23,623 Square feet or 2,195 Square metres
Displacement factor (Displacement / loading): 116 %
Structure weight / hull surface area: 94 lbs/sq ft or 458 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.24
- Overall: 1.00
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform

Image by Wes

Chilean Seaplane Cruiser laid down 1925 (Engine/Conversion 1927)

Displacement:
4,487 t light; 4,626 t standard; 5,150 t normal; 5,549 t full load

Dimensions: Length overall / water x beam x draught
392.00 ft / 385.00 ft x 48.10 ft x 16.25 ft (normal load)
119.48 m / 117.35 m x 14.66 m x 4.95 m

Armament:
4 - 5.90" / 150 mm guns (2x2 guns), 102.69lbs / 46.58kg shells, 1925 Model
Breech loading guns in deck mounts with hoists
on centreline, all forward, 1 raised mount - superfiring
8 - 1.46" / 37.0 mm guns in single mounts, 1.55lbs / 0.70kg shells, 1925 Model
Anti-aircraft guns in deck mounts
on side, all forward
8 - 0.50" / 12.7 mm guns (4x2 guns), 0.06lbs / 0.03kg shells, 1925 Model
Machine guns in deck mounts
on side, all amidships, all raised mounts - superfiring
Weight of broadside 424 lbs / 192 kg
Shells per gun, main battery: 150

8 floatplanes

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

- Conning tower: 0.75" / 19 mm

Machinery:
Oil fired boilers, steam turbines,
Direct drive, 2 shafts, 50,000 shp / 37,300 Kw = 29.01 kts
Range 3,500nm at 18.00 kts (Bunkerage = 944 tons)

Complement:
303 - 395

Cost:
£1.383 million / $5.530 million

Distribution of weights at normal displacement:
Armament: 53 tons, 1.0 %
Armour: 11 tons, 0.2 %
- Belts: 0 tons, 0.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 6 tons, 0.1 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 5 tons, 0.1 %
Machinery: 1,578 tons, 30.6 %
Hull, fittings & equipment: 2,195 tons, 42.6 %
Fuel, ammunition & stores: 663 tons, 12.9 %
Miscellaneous weights: 650 tons, 12.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
4,490 lbs / 2,037 Kg = 43.7 x 5.9 " / 150 mm shells or 0.9 torpedoes
Stability (Unstable if below 1.00): 1.01
Metacentric height 1.7 ft / 0.5 m
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.39
Seaboat quality (Average = 1.00): 1.22

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.599
Length to Beam Ratio: 8.00 : 1
'Natural speed' for length: 19.62 kts
Power going to wave formation at top speed: 67 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 10.12 degrees
Stern overhang: 2.00 ft / 0.61 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 28.00 ft / 8.53 m
- Forecastle (20 %): 22.00 ft / 6.71 m
- Mid (50 %): 21.00 ft / 6.40 m
- Quarterdeck (15 %): 20.00 ft / 6.10 m
- Stern: 20.00 ft / 6.10 m
- Average freeboard: 21.51 ft / 6.55 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 121.1 %
- Above water (accommodation/working, high = better): 174.4 %
Waterplane Area: 13,234 Square feet or 1,229 Square metres
Displacement factor (Displacement / loading): 121 %
Structure weight / hull surface area: 86 lbs/sq ft or 420 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.00
- Longitudinal: 4.85
- Overall: 1.17
Hull space for machinery, storage, compartmentation is cramped
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily