WesWorld

So some of you have noticed the large combatant under construction in Bangkok's largest Drydock. As Kirk has left what this ship is up to me, here are some proposals for what that ship could be. The springsharp files will each have there own post.

Project CLAA I, Thai Anti-Aircraft Cruiser laid down 1939

Displacement:
7,000 t light; 7,311 t standard; 8,396 t normal; 9,264 t full load

Dimensions: Length overall / water x beam x draught
501.95 ft / 492.13 ft x 50.85 ft x 21.33 ft (normal load)
153.00 m / 150.00 m x 15.50 m x 6.50 m

Armament:
12 - 4.72" / 120 mm guns (6x2 guns), 52.72lbs / 23.92kg shells, 1939 Model
Dual purpose guns in turrets (on barbettes)
on centreline ends, evenly spread, 4 raised mounts - superfiring
24 - 2.24" / 57.0 mm guns (12x2 guns), 5.65lbs / 2.56kg shells, 1939 Model
Dual purpose guns in deck mounts
on side, evenly spread, 6 raised mounts
28 - 0.98" / 25.0 mm guns (14x2 guns), 0.48lbs / 0.22kg shells, 1939 Model
Machine guns in deck mounts
on side, evenly spread, 6 raised mounts
Weight of broadside 782 lbs / 355 kg
Shells per gun, main battery: 300
8 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.72" / 120 mm 319.88 ft / 97.50 m 8.56 ft / 2.61 m
Ends: Unarmoured
Main Belt covers 100 % of normal length
Main belt does not fully cover magazines and engineering spaces

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.94" / 100 mm 2.95" / 75 mm 3.94" / 100 mm
2nd: 0.59" / 15 mm - -
3rd: 0.39" / 10 mm - -

- Armour deck: 1.97" / 50 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 84,887 shp / 63,326 Kw = 32.00 kts
Range 5,000nm at 20.00 kts
Bunker at max displacement = 1,953 tons

Complement:
438 - 570

Cost:
£3.774 million / $15.095 million

Distribution of weights at normal displacement:
Armament: 98 tons, 1.2 %
Armour: 1,546 tons, 18.4 %
- Belts: 541 tons, 6.4 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 369 tons, 4.4 %
- Armour Deck: 636 tons, 7.6 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 2,297 tons, 27.4 %
Hull, fittings & equipment: 2,834 tons, 33.8 %
Fuel, ammunition & stores: 1,396 tons, 16.6 %
Miscellaneous weights: 225 tons, 2.7 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
8,885 lbs / 4,030 Kg = 168.5 x 4.7 " / 120 mm shells or 1.3 torpedoes
Stability (Unstable if below 1.00): 1.03
Metacentric height 1.9 ft / 0.6 m
Roll period: 15.4 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.44
Seaboat quality (Average = 1.00): 1.00

Hull form characteristics:
Hull has low quarterdeck
Block coefficient: 0.551
Length to Beam Ratio: 9.68 : 1
'Natural speed' for length: 22.18 kts
Power going to wave formation at top speed: 63 %
Trim (Max stability = 0, Max steadiness = 100): 60
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 2.07 ft / 0.63 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 21.33 ft / 6.50 m
- Forecastle (20 %): 20.51 ft / 6.25 m
- Mid (50 %): 19.69 ft / 6.00 m
- Quarterdeck (15 %): 18.86 ft / 5.75 m (19.69 ft / 6.00 m before break)
- Stern: 18.86 ft / 5.75 m
- Average freeboard: 19.91 ft / 6.07 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 102.0 %
- Above water (accommodation/working, high = better): 117.8 %
Waterplane Area: 17,476 Square feet or 1,624 Square metres
Displacement factor (Displacement / loading): 117 %
Structure weight / hull surface area: 88 lbs/sq ft or 430 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.92
- Longitudinal: 2.06
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is adequate

Project CA I, Thai Heavy Cruiser laid down 1939

Displacement:
9,800 t light; 10,211 t standard; 11,596 t normal; 12,704 t full load

Dimensions: Length overall / water x beam x draught
557.74 ft / 541.34 ft x 59.06 ft x 21.33 ft (normal load)
170.00 m / 165.00 m x 18.00 m x 6.50 m

Armament:
6 - 8.00" / 203 mm guns (3x2 guns), 256.00lbs / 116.12kg shells, 1939 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
8 - 4.72" / 120 mm guns (4x2 guns), 52.72lbs / 23.92kg shells, 1939 Model
Dual purpose guns in turrets (on barbettes)
on side, all amidships
12 - 1.97" / 50.0 mm guns (6x2 guns), 3.81lbs / 1.73kg shells, 1939 Model
Dual purpose guns in deck mounts
on side, evenly spread
28 - 0.98" / 25.0 mm guns (2x14 guns), 0.48lbs / 0.22kg shells, 1939 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 2,017 lbs / 915 kg
Shells per gun, main battery: 150
8 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5.91" / 150 mm 351.87 ft / 107.25 m 9.22 ft / 2.81 m
Ends: Unarmoured
Main Belt covers 100 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.91" / 150 mm 3.94" / 100 mm 4.72" / 120 mm
2nd: 3.94" / 100 mm 2.95" / 75 mm 3.94" / 100 mm
3rd: 0.59" / 15 mm - -
4th: 0.39" / 10 mm - -

- Armour deck: 1.97" / 50 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 102,242 shp / 76,272 Kw = 32.00 kts
Range 5,250nm at 20.00 kts
Bunker at max displacement = 2,493 tons

Complement:
558 - 726

Cost:
£5.481 million / $21.924 million

Distribution of weights at normal displacement:
Armament: 252 tons, 2.2 %
Armour: 2,307 tons, 19.9 %
- Belts: 807 tons, 7.0 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 652 tons, 5.6 %
- Armour Deck: 848 tons, 7.3 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 2,766 tons, 23.9 %
Hull, fittings & equipment: 4,250 tons, 36.7 %
Fuel, ammunition & stores: 1,796 tons, 15.5 %
Miscellaneous weights: 225 tons, 1.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
13,608 lbs / 6,173 Kg = 53.2 x 8.0 " / 203 mm shells or 1.6 torpedoes
Stability (Unstable if below 1.00): 1.02
Metacentric height 2.4 ft / 0.7 m
Roll period: 16.1 seconds
Steadiness - As gun platform (Average = 50 %): 62 %
- Recoil effect (Restricted arc if above 1.00): 0.67
Seaboat quality (Average = 1.00): 1.00

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.595
Length to Beam Ratio: 9.17 : 1
'Natural speed' for length: 23.27 kts
Power going to wave formation at top speed: 63 %
Trim (Max stability = 0, Max steadiness = 100): 62
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 2.20 ft / 0.67 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 24.61 ft / 7.50 m
- Forecastle (20 %): 22.97 ft / 7.00 m
- Mid (50 %): 21.33 ft / 6.50 m
- Quarterdeck (15 %): 21.33 ft / 6.50 m
- Stern: 21.33 ft / 6.50 m
- Average freeboard: 22.03 ft / 6.72 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 96.8 %
- Above water (accommodation/working, high = better): 142.7 %
Waterplane Area: 23,279 Square feet or 2,163 Square metres
Displacement factor (Displacement / loading): 115 %
Structure weight / hull surface area: 107 lbs/sq ft or 524 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 1.92
- Overall: 1.00
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent

With thanks to Brock for the Design.

CLAA II, Thai Anti-Aircraft Cruiser, laid down 1939

Displacement:
5,000 t light; 5,250 t standard; 6,069 t normal; 6,724 t full load

Dimensions: Length overall / water x beam x draught
530.00 ft / 520.00 ft x 52.00 ft x 14.70 ft (normal load)
161.54 m / 158.50 m x 15.85 m x 4.48 m

Armament:
10 - 4.72" / 120 mm guns (5x2 guns), 52.72lbs / 23.92kg shells, 1939 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, majority forward, 3 raised mounts - superfiring
2 - 2.24" / 57.0 mm guns (1x2 guns), 5.65lbs / 2.56kg shells, 1939 Model
Anti-aircraft guns in deck mount
on centreline aft, all raised guns - superfiring
8 - 2.24" / 57.0 mm guns (4x2 guns), 5.65lbs / 2.56kg shells, 1939 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
2 - 0.79" / 20.0 mm guns (1x2 guns), 0.24lbs / 0.11kg shells, 1939 Model
Machine guns in deck mount
on centreline forward, all raised guns - superfiring
16 - 0.79" / 20.0 mm guns (4x4 guns), 0.24lbs / 0.11kg shells, 1939 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 588 lbs / 267 kg
Shells per gun, main battery: 375
6 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.00" / 76 mm 377.30 ft / 115.00 m 9.00 ft / 2.74 m
Ends: Unarmoured
Main Belt covers 112 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.97" / 50 mm 1.18" / 30 mm 1.97" / 50 mm

- Armour deck: 1.38" / 35 mm, Conning tower: 3.00" / 76 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 57,941 shp / 43,224 Kw = 32.00 kts
Range 5,000nm at 20.00 kts
Bunker at max displacement = 1,474 tons

Complement:
343 - 446

Cost:
£2.654 million / $10.618 million

Distribution of weights at normal displacement:
Armament: 74 tons, 1.2 %
Armour: 982 tons, 16.2 %
- Belts: 418 tons, 6.9 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 49 tons, 0.8 %
- Armour Deck: 493 tons, 8.1 %
- Conning Tower: 22 tons, 0.4 %
Machinery: 1,568 tons, 25.8 %
Hull, fittings & equipment: 2,327 tons, 38.3 %
Fuel, ammunition & stores: 1,069 tons, 17.6 %
Miscellaneous weights: 50 tons, 0.8 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
9,141 lbs / 4,146 Kg = 173.4 x 4.7 " / 120 mm shells or 1.4 torpedoes
Stability (Unstable if below 1.00): 1.21
Metacentric height 2.6 ft / 0.8 m
Roll period: 13.4 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.33
Seaboat quality (Average = 1.00): 1.17

Hull form characteristics:
Hull has rise forward of midbreak, low quarterdeck
and transom stern
Block coefficient: 0.534
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 25.92 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 60
Bow angle (Positive = bow angles forward): 21.80 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 25.00 ft / 7.62 m
- Forecastle (20 %): 23.00 ft / 7.01 m
- Mid (50 %): 22.00 ft / 6.71 m (18.00 ft / 5.49 m aft of break)
- Quarterdeck (35 %): 15.00 ft / 4.57 m (18.00 ft / 5.49 m before break)
- Stern: 15.00 ft / 4.57 m
- Average freeboard: 19.46 ft / 5.93 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): 191.2 %
Waterplane Area: 19,355 Square feet or 1,798 Square metres
Displacement factor (Displacement / loading): 128 %
Structure weight / hull surface area: 75 lbs/sq ft or 366 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.85
- Longitudinal: 1.53
- 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

Given the state of the current Thai cruiser fleet both the CA or AACL would be welcome. With the purchase of the two small Italian carriers I think that the AA cruiser might just win out over the CA. It would be more useful to the fleet anyway.

The I and II both look good, I like the superior armour and armament on the I. II is more affordable though and might let Thailand build two ships for reletively little cost.

I think the most modern CL I have was layed down during WWI...

Anyway, with the tonnage I am paying Italy for those CVLs and CDSs, I don't have much wiggle room on large ships. Kirk started a ship with a trickle of tonnage (500 per quarter) going into it. That is about the max rate I can put into this ship until Italy is payed off. That wont be done until 1941Q1. So this design is going to be a one-off. Right now, CLAA II is the front runner for me, as it can be finished sooner. With a clerical error being corrected, it means that she could be completed by 1940Q4 and finish trials and become active 1941Q2. Then that leaves me some tonnage to fix up the old laides and maybe get some new DD's in the water. Those are almost as bad as my cruisers.

Nice to see the Siam / Thialand is following Denmark's example in 120mm as a large AA battery aboard ship!

One of those ships (CLII) is almost a copy of the Valkyrie II class......

well CLAA II is what that construction is. I noticed that 120mm was standard for Danish capital secondaries.