WesWorld

Three classes to show you.

CV Urumi you've seen in a previous incarnation. I've modified her since then. The ship is still very much geared to the fleet scout mission, complete with cruiser armament. I've also added an upper belt in an effort to sim protection for the hanger walls. Air group is listed as 40, but some playing around suggests it'll be hard to get more than thirty aircraft below decks.

DD G-143 carries a new 12.5 cm gun but carries on with the traditional Indian destroyer layout.

Finally, T-19. In August 1924, India lost two of her sloops in action against Danish forces while on the blockade line against Siam. To India, this demonstrated that the sloops, while useful ASW/AAW platforms, were not up to surface actions. They're slow, not heavily armed, and lack torpedoes. Fast vessels, carrying torpedoes, would perhaps be better suited to police actions such as ship inspections, anti-piracy ops, and so forth. India's old torpedo-boats would have had this job - but they're too old and slow themselves.

So T-19 was cobbled together using elements of the G-143 design. She's a one-off experiment, and if results are satisfactory, we may see further units built from 1927 on.

Edit: I'm having some difficulties getting the pics in...bear with me.

Urumi, laid down 1925

Length, 203.0 m x Beam, 22.6 m x Depth, 6.2 m
14629 tonnes normal displacement (13030 tonnes standard)

Theoretical Air Group: 40

Main battery: 6 x 15.0-cm (2 x 3; 1 superfiring)
Secondary battery: 8 x 10.5-cm
AA battery: 8 x 3.5-cm
Light battery: 4 x 1.5-cm

Weight of broadside: 415 kg

4 TT, 50.0 cm (submerged, aft)

Main belt, 8.0 cm; ends unarmored
Upper belt, 8.0 cm
Armor deck, average 5.0 cm
Conning tower, 8.0 cm

Battery armor:
Main, 10.0 cm / secondary, 5.0 cm shields
AA, 2.0 cm shields / light guns, 2.0 cm shields

Maximum speed for 78005 shaft kw = 32.01 knots
Approximate cruising radius, 15000 nm / 12 knots

Typical complement: 665-865


Estimated cost, $13.275 million (£3.319 million)

Remarks:

Superfiring turret is aft.

Main turrets are grouped together.

Relative extent of belt armor, 98 percent of 'typical' coverage.

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

Ship is roomy, with superior accommodation and working space.


Distribution of weights:
Percent
normal
displacement:

Armament ......................... 114 tonnes = 1 pct
Armor, total ..................... 2438 tonnes = 17 pct

Belt 1015 tonnes = 7 pct
Deck 1145 tonnes = 8 pct
C.T. 41 tonnes = 0 pct
Armament 238 tonnes = 2 pct

Machinery ........................ 3394 tonnes = 23 pct
Hull and fittings; equipment ..... 5091 tonnes = 35 pct
Fuel, ammunition, stores ......... 1967 tonnes = 13 pct
Miscellaneous weights ............ 1625 tonnes = 11 pct
-----
14629 tonnes = 100 pct

Estimated metacentric height, 1.2 m

Displacement summary:

Light ship: 12662 tonnes
Standard displacement: 13030 tonnes
Normal service: 14629 tonnes
Full load: 15849 tonnes

Loading submergence 2946 tonnes/metre

+++++++++++++++++++++++++


Estimated overall survivability and seakeeping ability:

Relative margin of stability: 1.14

Shellfire needed to sink: 8089 kg = 172.4 x 15.0-cm shells
(Approximates weight of penetrating
shell hits needed to sink ship,
not counting critical hits)

Torpedoes needed to sink: 2.0
(Approximates number of 'typical'
torpedo hits needed to sink ship)

Relative steadiness as gun platform, 70 percent
(50 percent is 'average')

Relative rocking effect from firing to beam, 0.12

Relative quality as a seaboat: 1.09

+++++++++++++++++++++++++


Hull form characteristics:

Block coefficient: 0.51
Sharpness coefficient: 0.35
Hull speed coefficient 'M' = 8.33
'Natural speed' for length = 25.8 knots
Power going to wave formation
at top speed: 54 percent


Estimated hull characteristics and strength:

Relative underwater volume absorbed by
magazines and engineering spaces: 97 percent

Relative accommodation and working space: 177 percent


Displacement factor: 125 percent
(Displacement relative to loading factors)


Relative cross-sectional hull strength: 1.00
(Structure weight per square
metre of hull surface: 528 kg)

Relative longitudinal hull strength: 1.03
(for 6.00 m average freeboard;
freeboard adjustment +1.02 m)

Relative composite hull strength: 1.01

+++++++++++++++++++++++++


[Machine-readable parameters: Spring Style v. 1.2.1]

665.84 x 74.13 x 20.34; 19.68 -- Dimensions
0.51 -- Block coefficient
1925 -- Year laid down
32.01 / 15000 / 12.00; Oil-fired turbine or equivalent -- Speed / radius / cruise
1625 tons -- Miscellaneous weights
++++++++++
6 x 5.91; 2; 1 -- Main battery; turrets; superfiring
Central positioning of guns
Superfiring turret aft only
:
8 x 4.13; 0 -- Secondary battery; turrets
Gun-shields
:
8 x 1.38 -- Tertiary (QF/AA) battery
Gun-shields
:
4 x 0.59 -- Fourth (light) battery
4 / 4 / 19.69 -- TT / submerged / size
++++++++++
3.15 / 0.00 / 3.15 / 0.00; 98 -- Belt armor; relative extent
1.97 / 3.15 -- Deck / CT
3.94 / 1.97 / 0.79 / 0.79 -- Battery armor


(Note: For portability, values are stored in Anglo-American units)


+++++++++++++++++++++++++++++++++++++++++++++++++++++++

G143, Indian destroyer, laid down 1925

Length, 350 ft x Beam, 35.0 ft x Depth, 11.0 ft
1540 tons normal displacement (1404 tons standard)

Main battery: 4 x 4.9-inch
Secondary battery: 4 x 1.4-inch
AA battery: 4 x 0.6-inch

Weight of broadside: 241 lbs

8 TT, 19.7"

Hull unarmored
C.T., 2.0 inches

Battery armor:
Main, 2.0" shields / secondary, 1.0" shields
AA, 1.0" shields

Maximum speed for 38023 shp = 33.35 knots
Approximate cruising radius, 5000 nm / 12 kts

Typical complement: 123-160


Estimated cost, $2.464 million (£616,000)

Remarks:

Caution: Hull structure is subject to strain in open-sea
conditions.

Magazines and engineering spaces are cramped, with poor
watertight subdivision.


Distribution of weights:
Percent
normal
displacement:

Armament ......................... 30 tons = 2 pct
Armor, total ..................... 20 tons = 1 pct

C.T. 6 tons = 0 pct
Armament 15 tons = 1 pct

Machinery ........................ 825 tons = 54 pct
Hull and fittings; equipment ..... 452 tons = 29 pct
Fuel, ammunition, stores ......... 187 tons = 12 pct
Miscellaneous weights ............ 25 tons = 2 pct
-----
1540 tons = 100 pct

Estimated metacentric height, 1.8 ft

Displacement summary:

Light ship: 1353 tons
Standard displacement: 1404 tons
Normal service: 1540 tons
Full load: 1643 tons

Loading submergence 189 tons/foot

+++++++++++++++++++++++++


Estimated overall survivability and seakeeping ability:

Relative margin of stability: 1.35

Shellfire needed to sink: 386 lbs = 6.6 x 4.9-inch shells
(Approximates weight of penetrating
shell hits needed to sink ship,
not counting critical hits)

Torpedoes needed to sink: 0.3
(Approximates number of 'typical'
torpedo hits needed to sink ship)

Relative steadiness as gun platform, 61 percent
(50 percent is 'average')

Relative rocking effect from firing to beam, 0.19

Relative quality as a seaboat: 1.04

+++++++++++++++++++++++++


Hull form characteristics:

Block coefficient: 0.40
Sharpness coefficient: 0.30
Hull speed coefficient 'M' = 9.26
'Natural speed' for length = 18.7 knots
Power going to wave formation
at top speed: 67 percent


Estimated hull characteristics and strength:

Relative underwater volume absorbed by
magazines and engineering spaces: 190 percent

Relative accommodation and working space: 93 percent


Displacement factor: 56 percent
(Displacement relative to loading factors)


Relative cross-sectional hull strength: 0.50
(Structure weight per square
foot of hull surface: 35 lbs)

Relative longitudinal hull strength: 1.27
(for 15.0 ft average freeboard;
freeboard adjustment +4.6 ft)

Relative composite hull strength: 0.55

+++++++++++++++++++++++++


[Machine-readable parameters: Spring Style v. 1.2.1]

350.00 x 35.00 x 11.00; 15.00 -- Dimensions
0.40 -- Block coefficient
1925 -- Year laid down
33.35 / 5000 / 12.00; Oil-fired turbine or equivalent -- Speed / radius / cruise
25 tons -- Miscellaneous weights
++++++++++
4 x 4.90; 0 -- Main battery; turrets
Central positioning of guns
Gun-shields
:
4 x 1.40; 0 -- Secondary battery; turrets
Gun-shields
:
4 x 0.60 -- Tertiary (QF/AA) battery
Gun-shields
:
0 -- No fourth (light) battery
8 / 0 / 19.70 -- TT / submerged / size
++++++++++
0.00 -- No belt armor
0.00 / 2.00 -- Deck / CT
2.00 / 1.00 / 1.00 / 0.00 -- Battery armor


+++++++++++++++++++++++++++++++++++++++++++++++++++++++

T-19



T19, Indian torpedo-boat, laid down 1925

Length, 86.0 m x Beam, 7.2 m x Depth, 2.7 m
691 tonnes normal displacement (630 tonnes standard)

Main battery: 2 x 10.5-cm
Secondary battery: 2 x 3.5-cm
AA battery: 2 x 1.5-cm

Weight of broadside: 33 kg

4 TT, 50.0 cm

Hull unarmored

Battery armor:
Main, 4.0 cm shields / secondary, 2.0 cm shields
AA, 2.0 cm shields

Maximum speed for 16005 shaft kw = 32.09 knots
Approximate cruising radius, 3600 nm / 12 knots

Typical complement: 67-88


Estimated cost, $1.042 million (£260,000)

Remarks:

Caution: Hull structure is subject to strain in open-sea
conditions.

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

Good seaboat; rides out heavy weather easily.

Magazines and engineering spaces are cramped, with poor
watertight subdivision.


Distribution of weights:
Percent
normal
displacement:

Armament ......................... 9 tonnes = 1 pct
Armor, total ..................... 5 tonnes = 1 pct

Armament 5 tonnes = 1 pct

Machinery ........................ 361 tonnes = 52 pct
Hull and fittings; equipment ..... 225 tonnes = 33 pct
Fuel, ammunition, stores ......... 81 tonnes = 12 pct
Miscellaneous weights ............ 10 tonnes = 1 pct
-----
691 tonnes = 100 pct

Estimated metacentric height, 0.3 m

Displacement summary:

Light ship: 610 tonnes
Standard displacement: 630 tonnes
Normal service: 691 tonnes
Full load: 737 tonnes

Loading submergence 344 tonnes/metre

+++++++++++++++++++++++++


Estimated overall survivability and seakeeping ability:

Relative margin of stability: 1.22

Shellfire needed to sink: 93 kg = 5.8 x 10.5-cm shells
(Approximates weight of penetrating
shell hits needed to sink ship,
not counting critical hits)

Torpedoes needed to sink: 0.2
(Approximates number of 'typical'
torpedo hits needed to sink ship)

Relative steadiness as gun platform, 71 percent
(50 percent is 'average')

Relative rocking effect from firing to beam, 0.27

Relative quality as a seaboat: 1.39

+++++++++++++++++++++++++


Hull form characteristics:

Block coefficient: 0.41
Sharpness coefficient: 0.28
Hull speed coefficient 'M' = 9.75
'Natural speed' for length = 16.8 knots
Power going to wave formation
at top speed: 68 percent


Estimated hull characteristics and strength:

Relative underwater volume absorbed by
magazines and engineering spaces: 180 percent

Relative accommodation and working space: 91 percent


Displacement factor: 47 percent
(Displacement relative to loading factors)


Relative cross-sectional hull strength: 0.50
(Structure weight per square
metre of hull surface: 134 kg)

Relative longitudinal hull strength: 1.69
(for 4.20 m average freeboard;
freeboard adjustment +1.49 m)

Relative composite hull strength: 0.56

+++++++++++++++++++++++++


[Machine-readable parameters: Spring Style v. 1.2.1]

282.08 x 23.62 x 8.86; 13.78 -- Dimensions
0.41 -- Block coefficient
1925 -- Year laid down
32.09 / 3600 / 12.00; Oil-fired turbine or equivalent -- Speed / radius / cruise
10 tons -- Miscellaneous weights
++++++++++
2 x 4.13; 0 -- Main battery; turrets
Central positioning of guns
Gun-shields
:
2 x 1.38; 0 -- Secondary battery; turrets
Gun-shields
:
2 x 0.59 -- Tertiary (QF/AA) battery
Gun-shields
:
0 -- No fourth (light) battery
4 / 0 / 19.69 -- TT / submerged / size
++++++++++
0.00 -- No belt armor
0.00 / 0.00 -- Deck / CT
1.57 / 0.79 / 0.79 / 0.00 -- Battery armor


(Note: For portability, values are stored in Anglo-American units)


+++++++++++++++++++++++++++++++++++++++++++++++++++++++

Urumi; nice picture but more boats I think. And more arrestor wires as Swampy says. I think the 150mm gun barrels are still too thin. 2 pixels would be better. I'd also question the value of the curved landing deck aft. A straight edge is a more effective way.

G143; Strange place to put those torpedoes.

T19; nice

With the shutters and bulge being where they are, I didn't think there was any room to put additional boats to port. I'd hazard a guess that there are several boats on the starboard side, however.

The curved deck is partly aesthetic, but is also like that to give the aft battery a good arc of fire.

G-143's still using the old German/Japanese destroyer lay-out. I'd be curious to know if there's any data out there on how this layout worked...

Doesn't T19 count against India's destroyer tonnage?

If India acknowledges that she displaces more than 600 tons standard, yes, she would.

If, on the other hand, India says that she displaces 600 t standard exactly, she'd count as non-limited under 3.G.I.a of the treaty.

Which do you think India will do?

Hey - are you guys seeing pics for G-143 and T-19? Because I'm not, and the image script in my posts says that I should be...

Quoted

Hey - are you guys seeing pics for G-143 and T-19? Because I'm not, and the image script in my posts says that I should be...

I can see all the pics.

Quoted

G-143's still using the old German/Japanese destroyer lay-out. I'd be curious to know if there's any data out there on how this layout worked...

You can only fire the forward torpedoes when you turn broadside onto the enemy. I think that is bad.