WesWorld

The Empire of India is calling for designs for a coastal defence ship:

Design Date:

1928

Size:

0 to 8,000 t std

Note: Ships of 8,001 to 8,400 t will be officially eliminated but unofficially evaluated nonetheless.

Note: Ship's range should be appropriate to the mission and neither too small nor too large.

Armament:

At the discretion of the designer, but limited to:

30.5 cm
28 cm
25 cm
21 cm
15 cm
12.5 cm
10.5 cm
3.5 cm
1.5 cm
50 or 55 cm torpedoes

Possible Missions:

Fire support
Convoy defence
Coastal/littorial patrol
Blue water patrol

Armor, Speed, Range, Air Group:

As appropriate to mission.

Comments

The submission should be accompanied by an explanation of how the vessel is tailored to undertake its intended mission(s), including how the design accounts for specific threats that might be expected in such missions. The design does not need to be ideal for all missions, only some.

Uses the RSAN 250mm gun in duple mounts to provide fire support. Shallow draught allows coastal operations. Light guns can take care of coastal forces whilst heavy deck armour allows for little damage to be expected at longer ranges. 80mm vertical armour is same as mounted on Indian Light Cruisers. 500mm torpedoes are mounted in single mounts and would be used to attack targets of oppurntunity. Speed of 20knts is enough for convoy defense, whilst the range is for a high speed dash to "danger areas" e.g. if Italy lands troops in As Salif and marches through Saudi etc.




Indian Coastal Defense Ship laid down 1928

Displacement:
3,906 t light; 4,189 t standard; 4,997 t normal; 5,644 t full load

Dimensions: Length overall / water x beam x draught
370.26 ft / 360.89 ft x 52.49 ft x 13.78 ft (normal load)
112.86 m / 110.00 m x 16.00 m x 4.20 m

Armament:
4 - 9.84" / 250 mm guns (2x2 guns), 476.75lbs / 216.25kg shells, 1928 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
6 - 4.13" / 105 mm guns in single mounts, 35.32lbs / 16.02kg shells, 1928 Model
Anti-aircraft guns in deck mounts with hoists
on side, all amidships
8 - 1.38" / 35.0 mm guns (4x2 guns), 1.31lbs / 0.59kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side, all amidships
Weight of broadside 2,129 lbs / 966 kg
Shells per gun, main battery: 150
4 - 19.7" / 500 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.15" / 80 mm 156.50 ft / 47.70 m 8.69 ft / 2.65 m
Ends: Unarmoured
Main Belt covers 67 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.94" / 100 mm 2.76" / 70 mm 2.76" / 70 mm
2nd: 0.79" / 20 mm - -

- Armour deck: 3.15" / 80 mm, Conning tower: 5.91" / 150 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 12,000 shp / 8,952 Kw = 20.16 kts
Range 3,950nm at 20.16 kts
Bunker at max displacement = 1,455 tons

Complement:
296 - 386

Cost:
£1.575 million / $6.302 million

Distribution of weights at normal displacement:
Armament: 266 tons, 5.3 %
Armour: 1,277 tons, 25.6 %
- Belts: 206 tons, 4.1 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 173 tons, 3.5 %
- Armour Deck: 861 tons, 17.2 %
- Conning Tower: 37 tons, 0.7 %
Machinery: 374 tons, 7.5 %
Hull, fittings & equipment: 1,964 tons, 39.3 %
Fuel, ammunition & stores: 1,091 tons, 21.8 %
Miscellaneous weights: 25 tons, 0.5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
8,929 lbs / 4,050 Kg = 18.7 x 9.8 " / 250 mm shells or 1.9 torpedoes
Stability (Unstable if below 1.00): 1.26
Metacentric height 2.9 ft / 0.9 m
Roll period: 13.0 seconds
Steadiness - As gun platform (Average = 50 %): 61 %
- Recoil effect (Restricted arc if above 1.00): 0.63
Seaboat quality (Average = 1.00): 1.23

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.670
Length to Beam Ratio: 6.88 : 1
'Natural speed' for length: 19.00 kts
Power going to wave formation at top speed: 53 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 20.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 16.73 ft / 5.10 m
- Forecastle (28 %): 13.45 ft / 4.10 m
- Mid (50 %): 13.45 ft / 4.10 m
- Quarterdeck (28 %): 13.45 ft / 4.10 m
- Stern: 13.45 ft / 4.10 m
- Average freeboard: 13.82 ft / 4.21 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 66.7 %
- Above water (accommodation/working, high = better): 111.6 %
Waterplane Area: 14,780 Square feet or 1,373 Square metres
Displacement factor (Displacement / loading): 120 %
Structure weight / hull surface area: 96 lbs/sq ft or 468 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.93
- Longitudinal: 1.75
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Good seaboat, rides out heavy weather easily

Quoted

if Italy lands troops in As Salif and marches through Saudi etc

A few bribes, a couple thousand rifles, and the desert heat ought to take care of that latter threat.

Thanks for the submission. I'll comment later, once others are around for comparison.

Quoted

0 to 8,000 t std

So... anyone going to try and sim a 0 ton ship. :-)

The Royal Danish Navy Design Board would ask the following questions so as to better meet your needs......

Which guns listed have A/A capability.......

Which guns have a dual capability........

Teak or Mahogany for the deck.......

Chilean Proposal for a Coastal Defense Ship.

Nation Requesting proposal: India
Designer: Tochiro Oyama

This vessel would provide good Blue Sea patrol, and fire support capabilities (as support inshore would be broadside fire in general) The main battery is centered on the hull and used only in broadside actions. The primary use of the vessel would be patrols of one sort or another, hence the large number of medium and light batteries. It is assumed that the 105 mm cannons might be Dual Purpose once a satifactory weapon of said type is made. There are 70 tons of extra weight added to the vessel if the Indian Government wishes to add a seaplane, as in the American model, add additional firepower, or ammunition and provisions for extended patrols. The extra weight can also be traded for more armor around the medium and light batteries if that is so desired. Torpedoes were avoided in this design as they might not be armored enough to stop smaller weapons and aircraft from setting them off on the deck, and weak points under the waterline should be avoided.


Proposed Look of Vessel (Appearance and configuration may be altered to suit the needs of the Indian Navy)

Kitano (?)

Indian Coastal Defense Ship laid down 1928

Displacement:
6,005 t light; 6,400 t standard; 7,501 t normal; 8,352 t full load

Dimensions: Length overall / water x beam x draught
470.00 ft / 470.00 ft x 62.00 ft x 15.00 ft (normal load)
143.26 m / 143.26 m x 18.90 m x 4.57 m

Armament:
3 - 9.84" / 250 mm guns (1x3 guns), 476.75lbs / 216.25kg shells, 1928 Model
Breech loading guns in a turret (on a barbette)
on centreline amidships
8 - 5.91" / 150 mm guns (4x2 guns), 102.98lbs / 46.71kg shells, 1928 Model
Breech loading guns in deck mounts with hoists
on centreline ends, evenly spread, 2 raised mounts - superfiring
12 - 4.13" / 105 mm guns (6x2 guns), 35.32lbs / 16.02kg shells, 1928 Model
Quick firing guns in deck mounts
on side ends, evenly spread, 2 raised mounts - superfiring
12 - 1.38" / 35.0 mm guns (6x2 guns), 1.31lbs / 0.59kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 4 raised mounts
Weight of broadside 2,694 lbs / 1,222 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.00" / 102 mm 179.00 ft / 54.56 m 12.00 ft / 3.66 m
Ends: 3.00" / 76 mm 291.00 ft / 88.70 m 9.50 ft / 2.90 m
Main Belt covers 59 % 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: 1.00" / 25 mm - -
3rd: 1.00" / 25 mm - -

- Armour deck: 3.25" / 83 mm, Conning tower: 6.00" / 152 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 16,100 shp / 12,011 Kw = 21.02 kts
Range 4,000nm at 21.02 kts (Bunkerage = 1,981 tons)

Complement:
402 - 523

Cost:
£2.150 million / $8.601 million

Distribution of weights at normal displacement:
Armament: 337 tons, 4.5 %
Armour: 2,182 tons, 29.1 %
- Belts: 724 tons, 9.7 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 155 tons, 2.1 %
- Armour Deck: 1,254 tons, 16.7 %
- Conning Tower: 49 tons, 0.7 %
Machinery: 501 tons, 6.7 %
Hull, fittings & equipment: 2,915 tons, 38.9 %
Fuel, ammunition & stores: 1,496 tons, 19.9 %
Miscellaneous weights: 70 tons, 0.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
14,582 lbs / 6,614 Kg = 30.6 x 9.8 " / 250 mm shells or 2.7 torpedoes
Stability (Unstable if below 1.00): 1.31
Metacentric height 4.0 ft / 1.2 m
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.38
Seaboat quality (Average = 1.00): 1.20

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.601
Length to Beam Ratio: 7.58 : 1
'Natural speed' for length: 21.68 kts
Power going to wave formation at top speed: 45 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 20.33 ft / 6.20 m
- Forecastle (20 %): 14.00 ft / 4.27 m
- Mid (50 %): 12.00 ft / 3.66 m
- Quarterdeck (15 %): 12.00 ft / 3.66 m
- Stern: 12.00 ft / 3.66 m
- Average freeboard: 13.21 ft / 4.03 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 58.5 %
- Above water (accommodation/working, high = better): 123.2 %
Waterplane Area: 20,861 Square feet or 1,938 Square metres
Displacement factor (Displacement / loading): 126 %
Structure weight / hull surface area: 104 lbs/sq ft or 508 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.00
- Longitudinal: 1.01
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

No 88mm or 75mm guns available?

If the Indian Government asks for a CDS does this imply CT tonnage allotment for this category has to be used?

The design of RSAN NAGELRING could be made available to our Indian friends if there is interest in her. Except her 88mm guns she fulfills all requirements already and those guns can be easily replaced by those of 105mm caliber. If need be a torpedo defense bulkhead of 25mm can also be added.

Come and have a cruise on Athinai - now running trials.

From Greece News Q2

The first of the purpose built Escort Cruisers has been completed. The Athinai is the first ship to take the new 6" twin turret to sea. The rather weighty and complex twin turret is capable of high angle and rapid fire in low angle. The turret and gun was designed to counter fast moving surface craft of which Greece could expect many in the confined waters of the Eastern Mediteranian.

1925-Escort, Greece Escort Cruiser laid down 1925


NOTE: old drawing - now has TT tubes midships.

Displacement:
5,769 t light; 5,996 t standard; 6,312 t normal; 6,539 t full load
Loading submergence 480 tons/feet

Dimensions:
490.00 ft x 57.00 ft x 16.90 ft (normal load)
149.35 m x 17.37 m x 5.15 m

Armament:
8 - 6.00" / 152 mm guns (4 Main turrets x 2 guns, 2 superfiring turrets)
4 - 5.00" / 127 mm guns (4 2nd turrets x 1 guns)
24 - 2.00" / 51 mm AA guns
12 - 0.50" / 13 mm guns
Weight of broadside 1,211 lbs / 549 kg
12 - 21.0" / 533.4 mm above water torpedoes

Armour:
Belt 5.50" / 140 mm, ends unarmoured
Belts cover 64 % of normal area
Main turrets 6.00" / 152 mm
Armour deck 3.50" / 89 mm, Conning tower 6.00" / 152 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 22,031 shp / 16,435 Kw = 24.00 kts
Range 5,000nm at 12.00 kts

Complement:
354 - 460

Cost:
£1.405 million / $5.618 million

Distribution of weights at normal displacement:
Armament: 151 tons, 2.4 %
Armour: 2,014 tons, 31.9 %
Belts: 423 tons, 6.7 %, Armament: 460 tons, 7.3 %, Armour Deck: 1,087 tons, 17.2 %
Conning Tower: 44 tons, 0.7 %, Torpedo bulkhead: 0 tons, 0.0 %
Machinery: 715 tons, 11.3 %
Hull, fittings & equipment: 2,488 tons, 39.4 %
Fuel, ammunition & stores: 543 tons, 8.6 %
Miscellaneous weights: 400 tons, 6.3 %

Metacentric height 2.4

Remarks:
Hull space for machinery, storage & compartmentation is excellent
Room for accommodation & workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.05
Shellfire needed to sink: 10,933 lbs / 4,959 Kg = 101.2 x 6.0 " / 152 mm shells
(Approx weight of penetrating shell hits needed to sink ship excluding critical hits)
Torpedoes needed to sink: 2.3
(Approx number of typical torpedo hits needed to sink ship)
Relative steadiness as gun platform: 73 %
(Average = 50 %)
Relative rocking effect from firing to beam: 0.38
Relative quality as seaboat: 1.41

Hull form characteristics:
Block coefficient: 0.468
Sharpness coefficient: 0.34
Hull speed coefficient 'M': 8.11
'Natural speed' for length: 22.14 kts
Power going to wave formation at top speed: 46 %
Trim: 52
(Maximise stabilty/flotation = 0, Maximise steadiness/seakeeping = 100)

Estimated hull characteristics & strength:
Underwater volume absorbed by magazines and engineering spaces: 63.1 %
Relative accommodation and working space: 95.4 %
(Average = 100%)
Displacement factor: 125 %
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 0.97
(Structure weight / hull surface area: 95 lbs / square foot or 464 Kg / square metre)
Relative longitudinal hull strength: 1.23
(for 15.00 ft / 4.57 m average freeboard, freeboard adjustment 1.19 ft)
Relative composite hull strength: 1.00

To answer the questions posed so far:

Guns up to 12.5 cm have an AA capability.

The 12.5 cm gun itself is configured mainly for anti-surface work, but does have a HA capability.

Teak decks. I believe I have domestic supplies.

88 and 75 mm guns are, I suppose, possible, but as the type is not limited in regards to small guns, I'd prefer to stick with the existing calibers.

It is not implied that all CDS tonnage will be used on this type.

Commander de la Croix of the Marina de Filipinas Design Bureau has prepared two CDBB sketches
for the consideration of our Indian allies.

Both ships are based on our Dagupan-class CDBB, the first of which is currently running trials.

Design 1 uses the same Skoda 305/55 cannon as Dagupan herself, however other types
of 12" guns could be substituted.

Design 2 mounts two triple 250mm turrets, and has additional speed and range.

Both designs are identical in armour and secondary armament.

The armour scheme is a 225mm belt and a 40mm decapping plate, for a total of 265mm
of armour.

Secondary armament is two twin 150mm turrets, superfiring the main armament; six twin
105mm along the beam, and eight each 35mm and 15mm AA guns.

Both ships have 50t of miscellanious weight, for whatever purpose deemed suitable.
(Aircraft? Mines?)

No torpedoes are mounted in these designs. However they could be added with little difficulty.

If the Indians wish, Design 1 could be re-cast with 4 x 283mm, and additional armour, speed
and/or range.

Both vessels should make excellent convoy escorts, assault-support bombardment platforms,
and "minefield backstops", among many other possible roles.


(For the drawing - at least for Design 1 - , you can take the Dagupan/Panabo drawing
and replace the single 130mm turrets with twin 105s.)


Design 1:

CDS-28-305, Indian Coast Defense Battleship laid down 1928

Displacement:
7,564 t light; 8,000 t standard; 8,672 t normal; 9,209 t full load

Dimensions: Length overall / water x beam x draught
417.29 ft / 408.00 ft x 63.50 ft x 21.30 ft (normal load)
127.19 m / 124.36 m x 19.35 m x 6.49 m

Armament:
4 - 12.01" / 305 mm guns (2x2 guns), 925.00lbs / 419.57kg shells, 1928 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
4 - 5.91" / 150 mm guns (2x2 guns), 103.07lbs / 46.75kg shells, 1928 Model
Quick firing guns in turrets (on barbettes)
on side, all amidships, all raised mounts - superfiring
12 - 4.13" / 105 mm guns (6x2 guns), 35.27lbs / 16.00kg shells, 1928 Model
Dual purpose guns in deck mounts with hoists
on side, evenly spread
8 - 1.38" / 35.0 mm guns (6 mounts), 1.32lbs / 0.60kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
8 - 0.59" / 15.0 mm guns (6 mounts), 0.10lbs / 0.05kg shells, 1928 Model
Breech loading guns in deck mounts
on side, evenly spread, all raised mounts

Weight of broadside 4,547 lbs / 2,062 kg
Shells per gun, main battery: 100

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 8.86" / 225 mm 190.62 ft / 58.10 m 9.84 ft / 3.00 m
Ends: Unarmoured
Upper: 1.57" / 40 mm 190.62 ft / 58.10 m 10.66 ft / 3.25 m
Main Belt covers 72 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 10.4" / 265 mm 5.91" / 150 mm 9.84" / 250 mm
2nd: 1.97" / 50 mm 1.18" / 30 mm 1.97" / 50 mm
3rd: 1.18" / 30 mm - -
4th: 0.79" / 20 mm - -
5th: 0.59" / 15 mm - -

- Armour deck: 3.15" / 80 mm, Conning tower: 2.56" / 65 mm

Machinery:
Diesel Internal combustion generators,
Electric motors, 2 shafts, 20,600 shp / 15,368 Kw = 21.75 kts
Range 14,025nm at 10.00 kts (Bunkerage = 1,209 tons)

Complement:
449 - 584

Cost:
£3.081 million / $12.326 million

Distribution of weights at normal displacement:
Armament: 539 tons, 6.2 %
Armour: 2,768 tons, 31.9 %
- Belts: 938 tons, 10.8 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 754 tons, 8.7 %
- Armour Deck: 1,054 tons, 12.1 %
- Conning Tower: 23 tons, 0.3 %
Machinery: 641 tons, 7.4 %
Hull, fittings & equipment: 3,565 tons, 41.1 %
Fuel, ammunition & stores: 1,108 tons, 12.8 %
Miscellaneous weights: 50 tons, 0.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
11,761 lbs / 5,335 Kg = 13.6 x 12.0 " / 305 mm shells or 2.1 torpedoes
Stability (Unstable if below 1.00): 1.05
Metacentric height 2.8 ft / 0.9 m
Roll period: 16.0 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.87
Seaboat quality (Average = 1.00): 1.23

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.550
Length to Beam Ratio: 6.43 : 1
'Natural speed' for length: 20.20 kts
Power going to wave formation at top speed: 53 %
Trim (Max stability = 0, Max steadiness = 100): 49
Bow angle (Positive = bow angles forward): 22.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 23.00 ft / 7.01 m
- Forecastle (20 %): 16.00 ft / 4.88 m
- Mid (50 %): 15.00 ft / 4.57 m
- Quarterdeck (15 %): 15.00 ft / 4.57 m
- Stern: 15.00 ft / 4.57 m
- Average freeboard: 15.91 ft / 4.85 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 71.9 %
- Above water (accommodation/working, high = better): 116.8 %
Waterplane Area: 18,081 Square feet or 1,680 Square metres
Displacement factor (Displacement / loading): 103 %
Structure weight / hull surface area: 133 lbs/sq ft or 649 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.90
- Longitudinal: 2.37
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Good seaboat, rides out heavy weather easily



Design 2:

CDS-28-250, Indian Coast Defense Battleship laid down 1928

Displacement:
7,560 t light; 7,956 t standard; 8,672 t normal; 9,244 t full load

Dimensions: Length overall / water x beam x draught
417.29 ft / 408.00 ft x 63.50 ft x 21.30 ft (normal load)
127.19 m / 124.36 m x 19.35 m x 6.49 m

Armament:
6 - 9.84" / 250 mm guns (2x3 guns), 496.04lbs / 225.00kg shells, 1928 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
4 - 5.91" / 150 mm guns (2x2 guns), 103.07lbs / 46.75kg shells, 1928 Model
Quick firing guns in turrets (on barbettes)
on side, all amidships, all raised mounts - superfiring
12 - 4.13" / 105 mm guns (6x2 guns), 35.27lbs / 16.00kg shells, 1928 Model
Dual purpose guns in deck mounts with hoists
on side, evenly spread
8 - 1.38" / 35.0 mm guns (6 mounts), 1.32lbs / 0.60kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
8 - 0.59" / 15.0 mm guns (6 mounts), 0.10lbs / 0.05kg shells, 1928 Model
Breech loading guns in deck mounts
on side, evenly spread, all raised mounts

Weight of broadside 3,823 lbs / 1,734 kg
Shells per gun, main battery: 100

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 8.86" / 225 mm 196.85 ft / 60.00 m 9.84 ft / 3.00 m
Ends: Unarmoured
Upper: 1.57" / 40 mm 196.85 ft / 60.00 m 10.66 ft / 3.25 m
Main Belt covers 74 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 10.4" / 265 mm 5.91" / 150 mm 9.84" / 250 mm
2nd: 1.97" / 50 mm 1.18" / 30 mm 1.97" / 50 mm
3rd: 1.18" / 30 mm - -
4th: 0.79" / 20 mm - -
5th: 0.59" / 15 mm - -

- Armour deck: 3.15" / 80 mm, Conning tower: 2.56" / 65 mm

Machinery:
Diesel Internal combustion generators,
Electric motors, 2 shafts, 28,146 shp / 20,997 Kw = 23.50 kts
Range 15,000nm at 10.00 kts (Bunkerage = 1,288 tons)

Complement:
449 - 584

Cost:
£2.965 million / $11.860 million

Distribution of weights at normal displacement:
Armament: 463 tons, 5.3 %
Armour: 2,781 tons, 32.1 %
- Belts: 960 tons, 11.1 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 744 tons, 8.6 %
- Armour Deck: 1,054 tons, 12.1 %
- Conning Tower: 23 tons, 0.3 %
Machinery: 876 tons, 10.1 %
Hull, fittings & equipment: 3,390 tons, 39.1 %
Fuel, ammunition & stores: 1,112 tons, 12.8 %
Miscellaneous weights: 50 tons, 0.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
11,413 lbs / 5,177 Kg = 23.9 x 9.8 " / 250 mm shells or 2.1 torpedoes
Stability (Unstable if below 1.00): 1.05
Metacentric height 2.8 ft / 0.8 m
Roll period: 16.0 seconds
Steadiness - As gun platform (Average = 50 %): 55 %
- Recoil effect (Restricted arc if above 1.00): 0.71
Seaboat quality (Average = 1.00): 1.03

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.550
Length to Beam Ratio: 6.43 : 1
'Natural speed' for length: 20.20 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 53
Bow angle (Positive = bow angles forward): 22.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 23.00 ft / 7.01 m
- Forecastle (20 %): 16.00 ft / 4.88 m
- Mid (50 %): 15.00 ft / 4.57 m
- Quarterdeck (15 %): 15.00 ft / 4.57 m
- Stern: 15.00 ft / 4.57 m
- Average freeboard: 15.91 ft / 4.85 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 74.1 %
- Above water (accommodation/working, high = better): 116.8 %
Waterplane Area: 18,081 Square feet or 1,680 Square metres
Displacement factor (Displacement / loading): 105 %
Structure weight / hull surface area: 126 lbs/sq ft or 617 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.91
- Longitudinal: 2.27
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate

Stalwart,
(Having or marked by imposing physical strength; Firm and resolute; stout)

Proposed CDS for Indian Navy
Laid down 1928

Displacement:
7,466 t light; 8,000 t standard; 8,500 t normal; 8,900 t full load

Dimensions: Length overall / water x beam x draught
391.97 ft / 380.00 ft x 74.00 ft x 17.00 ft (normal load)
119.47 m / 115.82 m x 22.56 m x 5.18 m

Armament:
4 - 12.01" / 305 mm guns (2x2 guns), 865.70lbs / 392.67kg shells, 1928 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
4 - 4.92" / 125 mm guns (2x2 guns), 59.59lbs / 27.03kg shells, 1928 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, evenly spread, all raised mounts
8 - 4.92" / 125 mm guns (4x2 guns), 59.59lbs / 27.03kg shells, 1928 Model
Dual purpose guns in deck mounts with hoists
on side, evenly spread
16 - 1.38" / 35.0 mm guns (8x2 guns), 1.31lbs / 0.59kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 6 raised mounts
8 - 0.59" / 15.0 mm guns (4x2 guns), 0.10lbs / 0.05kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
Weight of broadside 4,200 lbs / 1,905 kg
Shells per gun, main battery: 150

6 - 19.7" / 500 mm above water torpedoes
These 2 triple mounts are armoured, 75 tons of misc weight is alloted for this purpose

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5.91" / 150 mm 182.35 ft / 55.58 m 10.33 ft / 3.15 m
Ends: Unarmoured
Main Belt covers 74 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.91" / 150 mm 3.94" / 100 mm 5.91" / 150 mm
2nd: 1.97" / 50 mm 0.79" / 20 mm -
3rd: 1.97" / 50 mm - -
4th: 0.59" / 15 mm - -
5th: 0.59" / 15 mm - -

- Armour deck: 3.15" / 80 mm, Conning tower: 5.91" / 150 mm

Machinery:
Diesel Internal combustion generators,
Electric motors, 2 shafts, 19,738 shp / 14,725 Kw = 21.00 kts
Range 6,500nm at 12.00 kts (Bunkerage = 900 tons)

Complement:
442 - 575

Cost:
£3.010 million / $12.040 million

Distribution of weights at normal displacement:
Armament: 525 tons, 6.2 %
Armour: 2,338 tons, 27.5 %
- Belts: 548 tons, 6.4 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 513 tons, 6.0 %
- Armour Deck: 1,224 tons, 14.4 %
- Conning Tower: 53 tons, 0.6 %
Machinery: 615 tons, 7.2 %
Hull, fittings & equipment: 3,839 tons, 45.2 %
Fuel, ammunition & stores: 1,034 tons, 12.2 %
Miscellaneous weights: 150 tons, 1.8 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
14,511 lbs / 6,582 Kg = 16.8 x 12.0 " / 305 mm shells or 2.4 torpedoes
Stability (Unstable if below 1.00): 1.12
Metacentric height 4.0 ft / 1.2 m
Roll period: 15.6 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.66
Seaboat quality (Average = 1.00): 1.20

Hull form characteristics:
Hull has low quarterdeck
Block coefficient: 0.622
Length to Beam Ratio: 5.14 : 1
'Natural speed' for length: 19.49 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 59
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 5.00 ft / 1.52 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 26.00 ft / 7.92 m
- Forecastle (20 %): 19.75 ft / 6.02 m
- Mid (50 %): 19.50 ft / 5.94 m
- Quarterdeck (20 %): 11.50 ft / 3.51 m (19.50 ft / 5.94 m before break)
- Stern: 11.50 ft / 3.51 m
- Average freeboard: 18.49 ft / 5.63 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 73.7 %
- Above water (accommodation/working, high = better): 154.2 %
Waterplane Area: 20,999 Square feet or 1,951 Square metres
Displacement factor (Displacement / loading): 107 %
Structure weight / hull surface area: 135 lbs/sq ft or 661 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.89
- Longitudinal: 2.83
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily


The Royal Danish Navy Design Board would propose the above design based on the following points as per your proposed mission brief

1 / Fire support

With 4 X 12" main guns on Stalwart, a platform with a slow, easy roll making it a good, steady gun platform, the possibilities with relation to accurate fire support are greatly increased. As will be appreciated following your recent involvements in the campaign against SALSA, this is a matter of concern for naval gunnery.

2 / Convoy defence

With an unrefuelled range of 6500 nautical miles and a cruising speed of 12 knots, enabling cruising to your primary economic partners (S.A.E., Japan, Phillipines) Stalwart will be able to guard convoys with ease. As listed above, the main armament would be able to deal with all threats short of a battlecruiser or larger.

3 / Coastal/littorial patrol

With a draft of 17' / 5.13 m, Stalwart will be able to patrol close inshore around most of India's coastline. As mentioned above the cruising range would allow for long duration coastal patrols, enabling the entire Indian coastline to be patrolled, in both directions, without the need for refueling.

4 / Blue water patrol

With a top speed of 21 knots, and the range listed above, Stalwart has the ability to reach any of India's island possessions quickly if needed. This speed also enables prompt reaction to tactical situations.

Also, Diesel-Electric porpulsion has been selected to allow a greater degree of compartmentalisation in the hull, enhancing survivability.
If, however, this is deemed unsuitable for local conditions, we can substitute a more appropriate form of propulsion, with no trade-off against the vessels other abilities.

Drawings of the proposed design can be supplied on request.

Did some futher tweaking, here's Design 3.

Compared to Design 1, it has 283mm guns instead of 305mm, but -

has greater speed
significantly increased range
thicker armour in all respects

Out of my three designs, I think this one is the best. :-)


Using 283mm guns also permits you to re-use turrets from Dara Shikoh, if you want to take that route.


CDS-28-283, Indian Coast Defense Battleship laid down 1928

Displacement:
7,289 t light; 7,780 t standard; 8,672 t normal; 9,385 t full load

Dimensions: Length overall / water x beam x draught
417.29 ft / 408.00 ft x 63.50 ft x 21.30 ft (normal load)
127.19 m / 124.36 m x 19.35 m x 6.49 m

Armament:
4 - 11.14" / 283 mm guns (2x2 guns), 694.46lbs / 315.00kg shells, 1928 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
4 - 5.91" / 150 mm guns (2x2 guns), 103.07lbs / 46.75kg shells, 1928 Model
Quick firing guns in turrets (on barbettes)
on centreline ends, evenly spread, all raised mounts
12 - 4.13" / 105 mm guns (6x2 guns), 35.27lbs / 16.00kg shells, 1928 Model
Quick firing guns in deck mounts with hoists
on side, evenly spread
8 - 1.38" / 35.0 mm guns (6 mounts), 1.32lbs / 0.60kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
8 - 0.59" / 15.0 mm guns (6 mounts), 0.10lbs / 0.05kg shells, 1928 Model
Breech loading guns in deck mounts
on side, evenly spread, all raised mounts

Weight of broadside 3,625 lbs / 1,644 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 9.65" / 245 mm 177.17 ft / 54.00 m 9.84 ft / 3.00 m
Ends: Unarmoured
Upper: 1.57" / 40 mm 177.17 ft / 54.00 m 11.48 ft / 3.50 m
Main Belt covers 67 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 11.2" / 285 mm 5.91" / 150 mm 9.84" / 250 mm
2nd: 1.97" / 50 mm 1.18" / 30 mm 1.97" / 50 mm
3rd: 1.18" / 30 mm - -
4th: 0.79" / 20 mm - -
5th: 0.59" / 15 mm - -

- Armour deck: 3.35" / 85 mm, Conning tower: 3.15" / 80 mm

Machinery:
Diesel Internal combustion generators,
Electric motors, 2 shafts, 21,562 shp / 16,086 Kw = 22.00 kts
Range 12,500nm at 12.00 kts (Bunkerage = 1,605 tons)

Complement:
449 - 584

Cost:
£2.782 million / $11.126 million

Distribution of weights at normal displacement:
Armament: 452 tons, 5.2 %
Armour: 2,822 tons, 32.5 %
- Belts: 967 tons, 11.1 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 707 tons, 8.1 %
- Armour Deck: 1,119 tons, 12.9 %
- Conning Tower: 29 tons, 0.3 %
Machinery: 671 tons, 7.7 %
Hull, fittings & equipment: 3,295 tons, 38.0 %
Fuel, ammunition & stores: 1,382 tons, 15.9 %
Miscellaneous weights: 50 tons, 0.6 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
12,488 lbs / 5,664 Kg = 18.1 x 11.1 " / 283 mm shells or 2.3 torpedoes
Stability (Unstable if below 1.00): 1.03
Metacentric height 2.7 ft / 0.8 m
Roll period: 16.3 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.76
Seaboat quality (Average = 1.00): 1.23

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.550
Length to Beam Ratio: 6.43 : 1
'Natural speed' for length: 20.20 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 57
Bow angle (Positive = bow angles forward): 22.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 23.00 ft / 7.01 m
- Forecastle (20 %): 16.00 ft / 4.88 m
- Mid (50 %): 15.00 ft / 4.57 m
- Quarterdeck (15 %): 15.00 ft / 4.57 m
- Stern: 15.00 ft / 4.57 m
- Average freeboard: 15.91 ft / 4.85 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 66.8 %
- Above water (accommodation/working, high = better): 116.8 %
Waterplane Area: 18,081 Square feet or 1,680 Square metres
Displacement factor (Displacement / loading): 111 %
Structure weight / hull surface area: 123 lbs/sq ft or 600 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.91
- Longitudinal: 2.26
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

As you might guess the Chilean design is the oddest one. A cruiser design with an added single heavy turret. The funnel arrangement is to make it different as it only has 16,100 shp and to keep any engine sections from going under or forward of the Main Turret, but can be moved to the traditional area behind the superstructure. Also it the Indians wish, the Main Turret can be placed forward or a stern for an enlarged firing arc.

Modified Model:

This version has the Main Turret forward, increased range and 50% more belt armor protection, along with a slightly more traditional funnel placement.



Kitano (1a)

Indian Coastal Defense Ship laid down 1928

Displacement:
6,298 t light; 6,693 t standard; 7,500 t normal; 8,115 t full load

Dimensions: Length overall / water x beam x draught
470.00 ft / 470.00 ft x 62.00 ft x 15.00 ft (normal load)
143.26 m / 143.26 m x 18.90 m x 4.57 m

Armament:
3 - 9.84" / 250 mm guns (1x3 guns), 476.75lbs / 216.25kg shells, 1928 Model
Breech loading guns in a turret (on a barbette)
on centreline forward
8 - 5.91" / 150 mm guns (4x2 guns), 102.98lbs / 46.71kg shells, 1928 Model
Breech loading guns in deck mounts with hoists
on centreline, evenly spread, 2 raised mounts
12 - 4.13" / 105 mm guns (6x2 guns), 35.32lbs / 16.02kg shells, 1928 Model
Quick firing guns in deck mounts
on side ends, evenly spread, 2 raised mounts - superfiring
12 - 1.38" / 35.0 mm guns (6x2 guns), 1.31lbs / 0.59kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 4 raised mounts
Weight of broadside 2,694 lbs / 1,222 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 6.00" / 152 mm 179.00 ft / 54.56 m 12.00 ft / 3.66 m
Ends: 3.00" / 76 mm 291.00 ft / 88.70 m 10.00 ft / 3.05 m
Main Belt covers 59 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 6.00" / 152 mm 3.00" / 76 mm 3.00" / 76 mm
2nd: 1.00" / 25 mm - -
3rd: 1.00" / 25 mm - -

- Armour deck: 3.25" / 83 mm, Conning tower: 6.00" / 152 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 16,100 shp / 12,011 Kw = 21.02 kts
Range 7,000nm at 15.00 kts (Bunkerage = 1,452 tons)

Complement:
402 - 523

Cost:
£2.189 million / $8.758 million

Distribution of weights at normal displacement:
Armament: 337 tons, 4.5 %
Armour: 2,424 tons, 32.3 %
- Belts: 949 tons, 12.6 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 172 tons, 2.3 %
- Armour Deck: 1,254 tons, 16.7 %
- Conning Tower: 49 tons, 0.7 %
Machinery: 501 tons, 6.7 %
Hull, fittings & equipment: 2,961 tons, 39.5 %
Fuel, ammunition & stores: 1,202 tons, 16.0 %
Miscellaneous weights: 75 tons, 1.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
14,559 lbs / 6,604 Kg = 30.5 x 9.8 " / 250 mm shells or 2.7 torpedoes
Stability (Unstable if below 1.00): 1.28
Metacentric height 3.8 ft / 1.2 m
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.40
Seaboat quality (Average = 1.00): 1.22

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.601
Length to Beam Ratio: 7.58 : 1
'Natural speed' for length: 21.68 kts
Power going to wave formation at top speed: 45 %
Trim (Max stability = 0, Max steadiness = 100): 57
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22.00 ft / 6.71 m
- Forecastle (20 %): 15.00 ft / 4.57 m
- Mid (50 %): 12.00 ft / 3.66 m
- Quarterdeck (15 %): 12.00 ft / 3.66 m
- Stern: 12.00 ft / 3.66 m
- Average freeboard: 13.61 ft / 4.15 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 58.6 %
- Above water (accommodation/working, high = better): 125.4 %
Waterplane Area: 20,860 Square feet or 1,938 Square metres
Displacement factor (Displacement / loading): 121 %
Structure weight / hull surface area: 105 lbs/sq ft or 513 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.00
- Longitudinal: 1.04
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

Of course if the Chileans were to build this ship for themselves (which I don't think I will), they would use guns they would want as standard...and armor it like the Tylor. Hull design is exactly the same, but the differences are notable with reduced range and reduced cruising speed, plus no extra weight.

Kitano

Chilean Coastal Defense Ship laid down 1928

Displacement:
6,737 t light; 7,145 t standard; 7,510 t normal; 7,772 t full load

Dimensions: Length overall / water x beam x draught
470.00 ft / 470.00 ft x 62.00 ft x 15.00 ft (normal load)
143.26 m / 143.26 m x 18.90 m x 4.57 m

Armament:
3 - 10.00" / 254 mm guns (1x3 guns), 500.00lbs / 226.80kg shells, 1928 Model
Breech loading guns in a turret (on a barbette)
on centreline forward
8 - 5.91" / 150 mm guns (4x2 guns), 102.98lbs / 46.71kg shells, 1928 Model
Breech loading guns in deck mounts with hoists
on centreline, evenly spread, 2 raised mounts
12 - 4.33" / 110 mm guns (6x2 guns), 40.61lbs / 18.42kg shells, 1928 Model
Quick firing guns in deck mounts
on side ends, evenly spread, 2 raised mounts - superfiring
12 - 1.46" / 37.0 mm guns (6x2 guns), 1.55lbs / 0.70kg shells, 1928 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, 4 raised mounts
2 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1928 Model
Machine guns in deck mounts
on centreline, evenly spread, all raised mounts
Weight of broadside 2,830 lbs / 1,284 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 8.50" / 216 mm 183.00 ft / 55.78 m 12.00 ft / 3.66 m
Ends: 3.00" / 76 mm 287.00 ft / 87.48 m 10.00 ft / 3.05 m
Main Belt covers 60 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 8.50" / 216 mm 4.25" / 108 mm 8.50" / 216 mm
2nd: 1.00" / 25 mm - -
3rd: 1.00" / 25 mm - -

- Armour deck: 3.25" / 83 mm, Conning tower: 6.00" / 152 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 16,100 shp / 12,011 Kw = 21.02 kts
Range 6,750nm at 10.50 kts (Bunkerage = 658 tons)

Complement:
403 - 524

Cost:
£2.303 million / $9.211 million

Distribution of weights at normal displacement:
Armament: 354 tons, 4.7 %
Armour: 2,825 tons, 37.6 %
- Belts: 1,219 tons, 16.2 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 301 tons, 4.0 %
- Armour Deck: 1,255 tons, 16.7 %
- Conning Tower: 50 tons, 0.7 %
Machinery: 501 tons, 6.7 %
Hull, fittings & equipment: 3,057 tons, 40.7 %
Fuel, ammunition & stores: 773 tons, 10.3 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
14,095 lbs / 6,393 Kg = 28.2 x 10.0 " / 254 mm shells or 2.7 torpedoes
Stability (Unstable if below 1.00): 1.22
Metacentric height 3.5 ft / 1.1 m
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.45
Seaboat quality (Average = 1.00): 1.20

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.601
Length to Beam Ratio: 7.58 : 1
'Natural speed' for length: 21.68 kts
Power going to wave formation at top speed: 45 %
Trim (Max stability = 0, Max steadiness = 100): 58
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 22.00 ft / 6.71 m
- Forecastle (20 %): 15.25 ft / 4.65 m
- Mid (50 %): 12.00 ft / 3.66 m
- Quarterdeck (15 %): 12.00 ft / 3.66 m
- Stern: 12.00 ft / 3.66 m
- Average freeboard: 13.68 ft / 4.17 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 59.2 %
- Above water (accommodation/working, high = better): 125.8 %
Waterplane Area: 20,878 Square feet or 1,940 Square metres
Displacement factor (Displacement / loading): 113 %
Structure weight / hull surface area: 108 lbs/sq ft or 529 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.00
- Longitudinal: 1.07
- Overall: 1.00
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

Thanks, everybody.

So that's 9 designs, plus several of the Design Board which I'll evaluate separately in that thread.

The responses here are fairly diverse; five of the nine are essentially full-sized ships, the other four are presumeably "big enough" to get their job done.

I'm not going to declare a winner, per se, but will run through some brief points about what I do and don't like about each design.

Ansaldo: ~4200 t, 4x25 cm, 20 kts

I like the small size and the range; speed is acceptable. Armor is perhaps a little light for something that may take on big ships, but as noted, this is equal to the Agra's protection.

I'm not entirely sure about a twin 25 cm mount fitting on to a ship with such narrow beam. If it's feasible, however, I re-ran the sim and, sacrificing some range, I found I could swap out the twin 25 cm for triple 21 cm if I were so inclined. Six such guns on 4,200 t standard is a pretty powerful little package.

Oyama #1: ~6400 t, 3x25 cm/8x15 cm, 21 kts

Correctly noted as the oddest of the designs. Certainly a powerful battery, and decent protection and speed.

However, the main battery only works for me if used for shore bombardment. Three guns will be a problem for accurate fire control, and its position amidships precludes it use in either chase or retreat situations.

I'm not convinced this many guns will fit on the hull in question, despite the sketch.

SAE Nagelring: ~8000 t, 6x25 cm, 25.6 kts

Good main battery, excellent speed (and then some...). Armor is adequate for dealing with cruiser-like opponents.

A very viable design, and it's a layout I've considered on my own.

Greek Athinai: ~6000 t, 8x15.2 cm, 24 kts

Certainly a match for any light cruiser out there, and the armor and high rate of fire would trouble many heavy cruisers. Good speed, and enough torpedoes to be a nuisance to raiding capital ships, though she won't be very scary once the fish are gone.

The battery's good for closer range fire support missions, but lacks the reach necessary to support troops inland. Is it a problem? Ask me once I've invaded somebody.

Very interesting design - big question is whether I'd expect her to be dealing with capital ships or not.

Filipino Dagupan #1: ~8000 t, 4x30.5 cm, 21.8 kts

Good battery for fire support, good protection, speed.

I'm not really sure of the value of two 15 cm guns on each beam.

The question that I have to ponder with designs like this and the later Danish submission, is whether four big guns will really work against a cruiser. Yes, the shells do hurt, but the rate of fire is slow, and spotting may be an issue with just four shells in the air. Is this going to be effective against a light cruiser zig-zagging at 32 knots? It is a more likely opponent than a battlecruiser, after all - there are more of them.

Filipino Dagupan #2: ~8000 t, 6x25 cm, 23.5 kts

Like the Nagelring, a nice battery, good protection, and good speed. Comparing the two is a matter of whether I value armor more than speed with this type of unit. I'm inclined to look for a middle ground - this ship's armor is overkill for repelling cruiser fire, but won't stop capital ship fire. Nagelring's armor is clearly intended for stopping cruiser fire.

Maybe a 15 cm belt, 8 cm deck, and ~24 knots are possible?

Danish Stalwart: ~8,000 t, 4x30.5 cm, 12x12.5 cm, 21 kts

If nothing else, the response is certainly detailed and well presented, and I appreciate that.

This is pretty much the armor scheme I'd like on an anti-cruiser CDS. Good secondary battery, decent speed.

But again, four big guns might not be best for anti-cruiser work. It'll hurt capital ships, but the CDS itself is extremely vulnerable to return fire and won't survive many hits.

I'd be curious to see the 4x30.5 cm swapped out for smaller guns and see what happens...

Filipino Door #3: ~7800 t, 4x28 cm, 22 knots

Similar in most respects to Dagupan #1. But given that the armor and speed increases don't really amount to much, I'd probably take the heavier gunned original to this version.

Chilean Kitano: ~6700 t, 3x25 cm, 21 kts

A better secondary battery if it all fits, and the armor's good for the mission. I'm still not keen on the main battery, but at least the position makes more sense.

For fire support missions, she'd be okay.

SO...

There is no clear-cut winner, but there are three general design types I like here - the Ansaldo design, which packs a big punch for its small size; the Nagelring/Dagupan 2 model, which gives a good balance of battery, armor, and speed; and the Athinai design, which will perform well against cruisers and smaller.

I would also consider the American six-gun monitors as viable candidates, despite their slow speed, in the convoy defense role. They won't catch anything, but may deter even modern capital ships from coming close.

If/when I do build CDS, one of these four types will probably look very similar to my end result. Which one that is will depend on the strategic situation at the time of laying-down.

Thanks, guys. Much appreciated!

Quoted

I'm not really sure of the value of two 15 cm guns on each beam.

Whoops! That was a mistake on my part. On both designs, the 150mm guns are on the centerline, superfiring the main battery. Sorry about that...

A very good analysis, Doc. Now I´m curious if we´ll see India lay down one of those designs - or at least one where we can clearly identify the roots it grew from.

Until 1928 a lot can happen - especially if one considers current politics. Let´s see if India lays down a CDS at all or if they are in the severe need of something else due to its SATSUMA allies getting into trouble... ;o) If so, this tender may be rendered meaningless...

My allies get in trouble? Inconceivable!

Has the final decision been made? Atlantis has yet to submit a design, given my week off.

Well, saying that I liked four designs was as close to a final decision as you'll get (for now).

But if you want to send one in, I'll happily nit-pick it too.