WesWorld

The United Kingdom is pleased to be able to offer the following design.

Despite being two-thirds the suggested displacement, and having a narrow hull for her type, the ship has required rather more power than desired. We would suggest that this requirement be modified.

However, as well as being significantly smaller than required, the ship requires fewer crew, and meets the standard of protection requested.

We hope this proposal meets with your approval.

<Your Name Here>, Export Cruiser laid down 1932

Displacement:
1,975 t light; 2,068 t standard; 2,858 t normal; 3,490 t full load

Dimensions: Length overall / water x beam x draught
423.68 ft / 419.00 ft x 45.50 ft x 9.00 ft (normal load)
129.14 m / 127.71 m x 13.87 m x 2.74 m

Armament:
6 - 5.51" / 140 mm guns (3x2 guns), 83.72lbs / 37.98kg shells, 1932 Model
Dual purpose guns in deck mounts with hoists
on centreline ends, majority aft, 1 raised mount aft - superfiring
2 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1932 Model
Quick firing guns in deck mounts
on centreline ends, evenly spread, all raised mounts
6 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1932 Model
Anti-aircraft guns in deck mounts
on side ends, evenly spread
8 - 0.55" / 14.0 mm guns (4x2 guns), 0.08lbs / 0.04kg shells, 1932 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 611 lbs / 277 kg
Shells per gun, main battery: 100
4 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1.00" / 25 mm 200.00 ft / 60.96 m 8.00 ft / 2.44 m
Ends: Unarmoured
Main Belt covers 73 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.00" / 51 mm 1.00" / 25 mm 1.00" / 25 mm
2nd: 0.50" / 13 mm - -
3rd: 0.50" / 13 mm - -

Machinery:
Coal and oil fired boilers, steam turbines,
Geared drive, 3 shafts, 12,962 shp / 9,670 Kw = 23.00 kts
Range 16,000nm at 12.00 kts
Bunker at max displacement = 1,422 tons (86% coal)

Complement:
195 - 254

Cost:
£0.870 million / $3.480 million

Distribution of weights at normal displacement:
Armament: 76 tons, 2.7 %
Armour: 106 tons, 3.7 %
- Belts: 71 tons, 2.5 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 35 tons, 1.2 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 415 tons, 14.5 %
Hull, fittings & equipment: 1,283 tons, 44.9 %
Fuel, ammunition & stores: 883 tons, 30.9 %
Miscellaneous weights: 95 tons, 3.3 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
6,168 lbs / 2,798 Kg = 73.7 x 5.5 " / 140 mm shells or 1.5 torpedoes
Stability (Unstable if below 1.00): 1.33
Metacentric height 2.5 ft / 0.8 m
Roll period: 12.0 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.31
Seaboat quality (Average = 1.00): 1.24

Hull form characteristics:
Hull has rise forward of midbreak
Block coefficient: 0.583
Length to Beam Ratio: 9.21 : 1
'Natural speed' for length: 20.47 kts
Power going to wave formation at top speed: 48 %
Trim (Max stability = 0, Max steadiness = 100): 57
Bow angle (Positive = bow angles forward): 12.00 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 %): 19.00 ft / 5.79 m
- Mid (44 %): 17.00 ft / 5.18 m (9.00 ft / 2.74 m aft of break)
- Quarterdeck (15 %): 9.00 ft / 2.74 m
- Stern: 11.00 ft / 3.35 m
- Average freeboard: 13.55 ft / 4.13 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 71.5 %
- Above water (accommodation/working, high = better): 141.3 %
Waterplane Area: 13,723 Square feet or 1,275 Square metres
Displacement factor (Displacement / loading): 174 %
Structure weight / hull surface area: 67 lbs/sq ft or 329 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.99
- Longitudinal: 1.05
- 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

(I assume that this is based on the historical Japanese-type "cruisers" the Chinese acquired?

IMHO these ships were rather unbalanced for their size, tho some of that may have been the coal...

You might want to take a peek in the Encyclopedia at the Filipino Durnaran type "coastal cruisers", to see what can be done on virtually the same hull - I used the historical Chinese ships as a starting point...)

India will submit a design in the next few days; in the mean time, India also invites China to examine the refitted Kolkata class-cruisers (see the Indian Encyclopedia). Two units, modernized in 1927, are due for deletion from Indian service in 1933-34. These may suit Chinese operational requirements, and would be less expensive than new construction.

is pleased to offer design below:

She meets all specifications for armament, speed, range, and protection.

Her entire waterline is armored, and her upper belt protects entire fighting compartment. Includes armored deck as well.

Main and antiaircraft guns have ammunition hoists, for high sustained firing rates. Large ammunition supply.

Excellent seakeeping and steadiness for gunnery.

Will fit in a Class 1 drydock, reducing infrastructure expense.


, Chinese Escort Cruiser laid down 1932

Displacement:
2,193 t light; 2,348 t standard; 2,615 t normal; 2,830 t full load

Dimensions: Length overall / water x beam x draught
393.70 ft / 393.70 ft x 39.37 ft x 11.81 ft (normal load)
120.00 m / 120.00 m x 12.00 m x 3.60 m

Armament:
6 - 5.51" / 140 mm guns (3x2 guns), 83.72lbs / 37.98kg shells, 1932 Model
Breech loading guns in deck mounts with hoists
on centreline ends, majority aft, 1 raised mount aft - superfiring
2 - 3.00" / 76.3 mm guns in single mounts, 13.55lbs / 6.15kg shells, 1932 Model
Anti-aircraft guns in deck mounts with hoists
on centreline ends, evenly spread, all raised mounts
4 - 3.00" / 76.3 mm guns in single mounts, 13.55lbs / 6.15kg shells, 1932 Model
Anti-aircraft guns in deck mounts with hoists
on side, evenly spread
12 - 0.50" / 12.7 mm guns (8 mounts), 0.06lbs / 0.03kg shells, 1932 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 584 lbs / 265 kg
Shells per gun, main battery: 300
4 - 21.0" / 533 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 0.98" / 25 mm 393.70 ft / 120.00 m 9.84 ft / 3.00 m
Ends: Unarmoured
Upper: 0.98" / 25 mm 295.28 ft / 90.00 m 8.86 ft / 2.70 m
Main Belt covers 154 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.18" / 30 mm - -
2nd: 1.18" / 30 mm - -
3rd: 1.18" / 30 mm - -

- Armour deck: 0.79" / 20 mm, Conning tower: 1.18" / 30 mm

Machinery:
Coal and oil fired boilers, steam turbines,
Geared drive, 3 shafts, 11,644 shp / 8,686 Kw = 23.00 kts
Range 6,000nm at 12.00 kts
Bunker at max displacement = 482 tons (80% coal)

Complement:
182 - 237

Cost:
£0.864 million / $3.455 million

Distribution of weights at normal displacement:
Armament: 73 tons, 2.8 %
Armour: 425 tons, 16.3 %
- Belts: 246 tons, 9.4 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 24 tons, 0.9 %
- Armour Deck: 150 tons, 5.8 %
- Conning Tower: 5 tons, 0.2 %
Machinery: 371 tons, 14.2 %
Hull, fittings & equipment: 1,174 tons, 44.9 %
Fuel, ammunition & stores: 422 tons, 16.1 %
Miscellaneous weights: 150 tons, 5.7 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
4,707 lbs / 2,135 Kg = 56.2 x 5.5 " / 140 mm shells or 1.2 torpedoes
Stability (Unstable if below 1.00): 1.17
Metacentric height 1.6 ft / 0.5 m
Roll period: 12.9 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.66
Seaboat quality (Average = 1.00): 1.73

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.500
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 19.84 kts
Power going to wave formation at top speed: 48 %
Trim (Max stability = 0, Max steadiness = 100): 41
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: 21.82 ft / 6.65 m
- Forecastle (20 %): 13.78 ft / 4.20 m
- Mid (50 %): 13.78 ft / 4.20 m
- Quarterdeck (15 %): 13.78 ft / 4.20 m
- Stern: 14.76 ft / 4.50 m
- Average freeboard: 14.50 ft / 4.42 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 76.6 %
- Above water (accommodation/working, high = better): 122.5 %
Waterplane Area: 10,327 Square feet or 959 Square metres
Displacement factor (Displacement / loading): 138 %
Structure weight / hull surface area: 68 lbs/sq ft or 333 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.78
- Overall: 1.01
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
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Indian Submission: Chinese CL-1932



Our design team that it was not difficult to meet the specifications provided in this tender; rather than limit ourselves to the specifications, we chose to exceed them (within reason) where possible. We did, however, have to adjust the hull dimensions in order to provide what we thought was a minimum amount of hull space for the intended hardware. It is, as the design sketches indicate, still a tight fit. We have included two alternate sketches in which the main difference is juxtaposing the hanger and catapult, though some further differences will be noted.

Armament is as specified. We have added twin mounts for our 35 mm cannons, which are useful in both anti-aircraft and anti-torpedo boat roles. These could be replaced in Chinese service with similar weapons such as the 40 mm or 37 mm. Note that India does not produce 14 and 7.6 cm guns, so these weapons would have to be either supplied by China or sub-contracted out.

Armor is above specification. The upper belt exists to protect the hanger and aviation fuel storage from light weapons fire, lest this combustible area be ignited in combat.

The aircraft suite is as specified. It is necessary in the one version of the design to flare the upper hull slightly in order to accommodate a hanger wide enough for two aircraft (a crude top view is included to show the fit). One catapult and one or two cranes are provided, depending on the layout. India’s Dhairya-type scouts are illustrated.

Bunkerage and propulsion are above specification; however, this is with an all-oil bunkerage. A reduction in range and speed - both currently above specification - should allow for inclusion of coal bunkers.

Miscellaneous weight allocations are:

-50 t for two aircraft
-25 t for one catapult
-25 t for command facilities
-35 t for growth or addition of coal bunkerage.

We have not provided for anti-submarine or mine-laying equipment, judging that these missions will be outside the vessel’s role; lack of available deck space is also a factor.

India would be capable of laying down two such vessels at its shipyard in Sittwe, in the first and third quarters of 1932. Additional units can be built at a similar rate in Chennai using either slipways or drydocks if required.

Cost to the buyer would be 110% of the ship’s light displacement per unit, that being the cost of construction plus a 10% charge for use of the slipway. Purchase of exclusive rights to this design would cost a further 10% of the light displacement, on the first unit only. India is willing to negotiate terms of payment if required.

(As an aside to all: thoughts on this design, or a variation, as an escort using CDS tonnage?)


CCL, laid down 1932

Length, 120.0 m x Beam, 14.0 m x Depth, 3.5 m
2727 tonnes normal displacement (2512 tonnes standard)

Main battery: 6 x 14.0-cm
Secondary battery: 6 x 7.6-cm
AA battery: 8 x 3.5-cm

Weight of broadside: 270 kg

4 TT, 53.3 cm

Main belt, 5.0 cm; bow and stern, 2.5 cm
Upper belt, 2.5 cm
Armor deck, average 2.5 cm
Conning tower, 5.0 cm

Battery armor:
Main, 2.5 cm shields / secondary, 2.0 cm shields
AA, 2.0 cm shields

Maximum speed for 12005 shaft kw = 24.78 knots
Approximate cruising radius, 6000 nm / 12 knots

Typical complement: 189-245


Estimated cost, $3.873 million (£968,000)

Remarks:

Relative extent of belt armor, 85 percent of 'typical' coverage.

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

Good seaboat; rides out heavy weather easily.

Ship is roomy, with superior accommodation and working space.


Distribution of weights:
Percent
normal
displacement:

Armament ......................... 74 tonnes = 3 pct
Armor, total ..................... 471 tonnes = 17 pct

Belt 251 tonnes = 9 pct
Deck 195 tonnes = 7 pct
C.T. 8 tonnes = 0 pct
Armament 18 tonnes = 1 pct

Machinery ........................ 475 tonnes = 17 pct
Hull and fittings; equipment ..... 1252 tonnes = 46 pct
Fuel, ammunition, stores ......... 319 tonnes = 12 pct
Miscellaneous weights ............ 135 tonnes = 5 pct
-----
2727 tonnes = 100 pct

Estimated metacentric height, 0.6 m

Displacement summary:

Light ship: 2408 tonnes
Standard displacement: 2512 tonnes
Normal service: 2727 tonnes
Full load: 2888 tonnes

Loading submergence 1007 tonnes/metre

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


Estimated overall survivability and seakeeping ability:

Relative margin of stability: 1.17

Shellfire needed to sink: 2224 kg = 58.4 x 14.0-cm shells
(Approximates weight of penetrating
shell hits needed to sink ship,
not counting critical hits)

Torpedoes needed to sink: 1.2
(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, 0.22

Relative quality as a seaboat: 1.35

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


Hull form characteristics:

Block coefficient: 0.46
Sharpness coefficient: 0.33
Hull speed coefficient 'M' = 8.61
'Natural speed' for length = 19.8 knots
Power going to wave formation
at top speed: 52 percent


Estimated hull characteristics and strength:

Relative underwater volume absorbed by
magazines and engineering spaces: 83 percent

Relative accommodation and working space: 145 percent


Displacement factor: 127 percent
(Displacement relative to loading factors)


Relative cross-sectional hull strength: 0.94
(Structure weight per square
metre of hull surface: 351 kg)

Relative longitudinal hull strength: 1.72
(for 4.80 m average freeboard;
freeboard adjustment +1.24 m)

Relative composite hull strength: 1.00

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


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

393.60 x 45.92 x 11.48; 15.74 -- Dimensions
0.46 -- Block coefficient
1932 -- Year laid down
24.78 / 6000 / 12.00; Oil-fired turbine or equivalent -- Speed / radius / cruise
135 tons -- Miscellaneous weights
++++++++++
6 x 5.51; 0 -- Main battery; turrets
Central positioning of guns
Gun-shields
:
6 x 2.99; 0 -- Secondary battery; turrets
Gun-shields
:
8 x 1.38 -- Tertiary (QF/AA) battery
Gun-shields
:
0 -- No fourth (light) battery
4 / 0 / 20.98 -- TT / submerged / size
++++++++++
1.97 / 0.98 / 0.98 / 0.00; 85 -- Belt armor; relative extent
0.98 / 1.97 -- Deck / CT
0.98 / 0.79 / 0.79 / 0.00 -- Battery armor


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


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

The SAE welcomes Chinas effort to build up a small navy to limit the warlords access to the sea and support of pirates.

The RSAN proposes a design slightly smaller than what was originally requested to save money. All requirements can be met with a ship cheaper and smaller which will not only help operations near the coast.

Detailled conditions of the deal can be clarified later should our design find enough support among chinese officials.

CNDO A, Chinese CL laid down 1932

Displacement:
2.168 t light; 2.271 t standard; 2.531 t normal; 2.738 t full load

Dimensions: Length overall / water x beam x draught
360,89 ft / 360,89 ft x 39,37 ft x 12,47 ft (normal load)
110,00 m / 110,00 m x 12,00 m x 3,80 m

Armament:
6 - 5,51" / 140 mm guns (3x2 guns), 83,72lbs / 37,98kg shells, 1932 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
6 - 3,00" / 76,3 mm guns in single mounts, 13,55lbs / 6,15kg shells, 1932 Model
Dual purpose guns in deck mounts
on side, all amidships, 2 raised mounts - superfiring
4 - 1,57" / 40,0 mm guns (2x2 guns), 1,95lbs / 0,89kg shells, 1932 Model
Anti-aircraft guns in deck mounts
on side, evenly spread, all raised mounts
6 - 0,79" / 20,0 mm guns (3x2 guns), 0,24lbs / 0,11kg shells, 1932 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 593 lbs / 269 kg
Shells per gun, main battery: 150
4 - 21,0" / 533 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2,36" / 60 mm 203,41 ft / 62,00 m 11,48 ft / 3,50 m
Ends: Unarmoured
Upper: 1,38" / 35 mm 131,23 ft / 40,00 m 6,56 ft / 2,00 m
Main Belt covers 87% of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1,57" / 40 mm 0,98" / 25 mm 1,57" / 40 mm
2nd: 0,98" / 25 mm 0,59" / 15 mm -
3rd: 0,59" / 15 mm - -
4th: 0,39" / 10 mm - -

Machinery:
Coal and oil fired boilers, steam turbines,
Geared drive, 3 shafts, 13.405 shp / 10.000 Kw = 23,73 kts
Range 6.000nm at 12,00 kts
Bunker at max displacement = 468 tons (80% coal)

Complement:
177 - 231

Cost:
£0,899 million / $3,598 million

Distribution of weights at normal displacement:
Armament: 74 tons, 2,9%
Armour: 364 tons, 14,4%
- Belts: 293 tons, 11,6%
- Torpedo bulkhead: 0 tons, 0,0%
- Armament: 71 tons, 2,8%
- Armour Deck: 0 tons, 0,0%
- Conning Tower: 0 tons, 0,0%
Machinery: 427 tons, 16,9%
Hull, fittings & equipment: 1.103 tons, 43,6%
Fuel, ammunition & stores: 363 tons, 14,3%
Miscellaneous weights: 200 tons, 7,9%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
3.651 lbs / 1.656 Kg = 43,6 x 5,5 " / 140 mm shells or 1,0 torpedoes
Stability (Unstable if below 1.00): 1,06
Metacentric height 1,4 ft / 0,4 m
Roll period: 14,0 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0,66
Seaboat quality (Average = 1.00): 1,34

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0,500
Length to Beam Ratio: 9,17 : 1
'Natural speed' for length: 19,00 kts
Power going to wave formation at top speed: 53 %
Trim (Max stability = 0, Max steadiness = 100): 53
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: 20,90 ft / 6,37 m
- Forecastle (20%): 13,29 ft / 4,05 m
- Mid (50%): 13,29 ft / 4,05 m
- Quarterdeck (15%): 13,29 ft / 4,05 m
- Stern: 13,29 ft / 4,05 m
- Average freeboard: 13,90 ft / 4,24 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 86,5%
- Above water (accommodation/working, high = better): 109,1%
Waterplane Area: 9.467 Square feet or 879 Square metres
Displacement factor (Displacement / loading): 126%
Structure weight / hull surface area: 71 lbs/sq ft or 346 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,98
- Longitudinal: 1,91
- Overall: 1,05
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

While faster and heavier than the Chinese request, Versitile Vickers would be interested in developing a variant of the Diana class already in service with the RCN for the Chinese Government;

http://wesworld.jk-clan.de/thread.php?bo…d=3112&page=1#2

(I'd try modifying the design to better suit, but my inability to run springsharp rears it's head again)

Rocky - I definitly like it (IMHO the first one, with the hangar aft, looks better).

The Mexican entry. As you can see she has plenty of potential to be upgraded. She is based on the Mexican Alvaro Obregon Gunboat.

Mexico Gunboat laid down 1932

Displacement:
2,403 t light; 2,510 t standard; 2,942 t normal; 3,287 t full load

Dimensions: Length overall / water x beam x draught
360.00 ft / 360.00 ft x 40.00 ft x 13.00 ft (normal load)
109.73 m / 109.73 m x 12.19 m x 3.96 m

Armament:
6 - 5.51" / 140 mm guns (3x2 guns), 83.72lbs / 37.98kg shells, 1932 Model
Breech loading guns in deck mounts with hoists
on centreline ends, majority forward, 1 raised mount - superfiring
4 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1932 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
8 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1932 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 557 lbs / 253 kg
Shells per gun, main battery: 150
4 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1.00" / 25 mm 155.00 ft / 47.24 m 8.00 ft / 2.44 m
Ends: Unarmoured
Main Belt covers 66 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm - -

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 13,317 shp / 9,935 Kw = 23.00 kts
Range 7,000nm at 15.00 kts
Bunker at max displacement = 777 tons

Complement:
199 - 259

Cost:
£0.898 million / $3.593 million

Distribution of weights at normal displacement:
Armament: 70 tons, 2.4 %
Armour: 73 tons, 2.5 %
- Belts: 56 tons, 1.9 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 16 tons, 0.6 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 393 tons, 13.4 %
Hull, fittings & equipment: 1,768 tons, 60.1 %
Fuel, ammunition & stores: 539 tons, 18.3 %
Miscellaneous weights: 100 tons, 3.4 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
5,913 lbs / 2,682 Kg = 70.6 x 5.5 " / 140 mm shells or 1.5 torpedoes
Stability (Unstable if below 1.00): 1.14
Metacentric height 1.6 ft / 0.5 m
Roll period: 13.2 seconds
Steadiness - As gun platform (Average = 50 %): 65 %
- Recoil effect (Restricted arc if above 1.00): 0.60
Seaboat quality (Average = 1.00): 1.59

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.550
Length to Beam Ratio: 9.00 : 1
'Natural speed' for length: 18.97 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 41
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: 19.00 ft / 5.79 m
- Forecastle (15 %): 17.00 ft / 5.18 m
- Mid (40 %): 15.00 ft / 4.57 m
- Quarterdeck (11 %): 15.00 ft / 4.57 m
- Stern: 15.00 ft / 4.57 m
- Average freeboard: 15.67 ft / 4.78 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 66.2 %
- Above water (accommodation/working, high = better): 119.3 %
Waterplane Area: 10,050 Square feet or 934 Square metres
Displacement factor (Displacement / loading): 194 %
Structure weight / hull surface area: 101 lbs/sq ft or 493 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.40
- Longitudinal: 3.73
- Overall: 1.54
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Updated Mexican Entry. While meeting all the reqirements she is half the size, which means China can build 2 for 1 of this ship. She also has room for improvement if China so desires.


Mexico Gunboat laid down 1932

Displacement:
1,665 t light; 1,757 t standard; 2,206 t normal; 2,565 t full load

Dimensions: Length overall / water x beam x draught
330.00 ft / 330.00 ft x 36.00 ft x 13.00 ft (normal load)
100.58 m / 100.58 m x 10.97 m x 3.96 m

Armament:
6 - 5.51" / 140 mm guns (3x2 guns), 83.72lbs / 37.97kg shells, 1932 Model
Breech loading guns in deck mounts with hoists
on centreline ends, majority forward, 1 raised mount - superfiring
4 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1932 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
8 - 0.50" / 12.7 mm guns in single mounts, 0.06lbs / 0.03kg shells, 1932 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 557 lbs / 253 kg
Shells per gun, main battery: 150
4 - 21.0" / 533.4 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 1.00" / 25 mm 180.00 ft / 54.86 m 8.00 ft / 2.44 m
Ends: Unarmoured
Main Belt covers 84 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm - -

Machinery:
Coal and oil fired boilers, steam turbines,
Geared drive, 2 shafts, 11,243 shp / 8,387 Kw = 23.00 kts
Range 7,000nm at 15.00 kts
Bunker at max displacement = 808 tons (70% coal)

Complement:
160 - 209

Cost:
£0.756 million / $3.025 million

Distribution of weights at normal displacement:
Armament: 70 tons, 3.2 %
Armour: 79 tons, 3.6 %
- Belts: 62 tons, 2.8 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 16 tons, 0.7 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 354 tons, 16.1 %
Hull, fittings & equipment: 1,063 tons, 48.2 %
Fuel, ammunition & stores: 541 tons, 24.5 %
Miscellaneous weights: 100 tons, 4.5 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
3,556 lbs / 1,613 Kg = 42.5 x 5.5 " / 140 mm shells or 1.0 torpedoes
Stability (Unstable if below 1.00): 1.15
Metacentric height 1.4 ft / 0.4 m
Roll period: 12.8 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.88
Seaboat quality (Average = 1.00): 1.62

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.500
Length to Beam Ratio: 9.17 : 1
'Natural speed' for length: 18.17 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 44
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: 18.00 ft / 5.49 m
- Forecastle (15 %): 15.00 ft / 4.57 m
- Mid (40 %): 15.00 ft / 4.57 m
- Quarterdeck (11 %): 13.00 ft / 3.96 m
- Stern: 13.00 ft / 3.96 m
- Average freeboard: 14.47 ft / 4.41 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 82.0 %
- Above water (accommodation/working, high = better): 103.8 %
Waterplane Area: 7,915 Square feet or 735 Square metres
Displacement factor (Displacement / loading): 153 %
Structure weight / hull surface area: 73 lbs/sq ft or 356 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.01
- Longitudinal: 3.26
- Overall: 1.14
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
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

It's a smaller design, but I'm skeptical that - despite what the report says - that you can fit that armament, a two-aircraft hanger, and a catapult on a hull shorter than a destroyer.

I think this is one of those competitions where the drawing is more important than the springsharp...

SpringSharp doesn't necessarily deal well with slower (for their date) vessels, that's been noticed before.

Ahhh!!! I knew I forgot something. I know it can at least fit one aircraft and catapult and maybe stuff another one in there, but I totaly forgot about the hangar.

As a cheaper alternative China could aquire the following vessels from Atlantis, comparable in reguards to the specs listed for this design request...

Champion, Maturia



5x5.5", 1x4", 4x3",6x1", 8x21" TT's (2 submerged)

Speed: 30 knots
Complement: 399
Displacement: 4,833 tons light

Undaunted, Inconstant



5x5.5", 1x4", 4x3",6x1", 8x21" TT's (2 submerged)

Speed: 30 knots
Complement: 399
Displacement: 4,824 tons light

These ships are due for replacement under Treaty rules and are in reasonable condition. Speed and armor are in excess to the requirements specified.

This entry does not meet certain criteria (armament, armor) laid out, and is submitted for as an intellectual exercise - though if China is interested, we can certainly talk business.

This design is more of a large destroyer. Two dual 14 cm deck mounts are mounted aft; one is mounted forward, with the quadruple 1.5 cm "buzzsaw" mounted in the B position. 3.5 cm guns in dual mounts on the sides. A single floatplane on a catapult is carried; rather than install a heavy hanger, a collapsable canvas hanger is installed (akin to that on India's Nanda Devi class frigate).

20 t is allocated for ASDIC (10 t) and depth charges (~30) on rails. No depth charge throwers are included.


c, laid down 1932

Length, 120.0 m x Beam, 12.0 m x Depth, 4.2 m
2439 tonnes normal displacement (2189 tonnes standard)

Main battery: 6 x 14.0-cm
Secondary battery: 8 x 3.5-cm
AA battery: 4 x 1.5-cm

Weight of broadside: 233 kg

8 TT, 53.3 cm

Hull unarmored
Conning tower, 3.0 cm

Battery armor:
Main, 3.0 cm shields / secondary, 2.0 cm shields
AA, 2.0 cm shields

Maximum speed for 36006 shaft kw = 33.44 knots
Approximate cruising radius, 7500 nm / 12 knots

Typical complement: 174-226


Estimated cost, $5.349 million (£1.337 million)

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 ......................... 64 tonnes = 3 pct
Armor, total ..................... 21 tonnes = 1 pct

C.T. 5 tonnes = 0 pct
Armament 16 tonnes = 1 pct

Machinery ........................ 1192 tonnes = 49 pct
Hull and fittings; equipment ..... 751 tonnes = 31 pct
Fuel, ammunition, stores ......... 342 tonnes = 14 pct
Miscellaneous weights ............ 70 tonnes = 3 pct
-----
2439 tonnes = 100 pct

Estimated metacentric height, 0.6 m

Displacement summary:

Light ship: 2098 tonnes
Standard displacement: 2189 tonnes
Normal service: 2439 tonnes
Full load: 2629 tonnes

Loading submergence 786 tonnes/metre

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


Estimated overall survivability and seakeeping ability:

Relative margin of stability: 1.24

Shellfire needed to sink: 301 kg = 7.9 x 14.0-cm 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, 67 percent
(50 percent is 'average')

Relative rocking effect from firing to beam, 0.29

Relative quality as a seaboat: 1.04

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


Hull form characteristics:

Block coefficient: 0.40
Sharpness coefficient: 0.30
Hull speed coefficient 'M' = 8.94
'Natural speed' for length = 19.8 knots
Power going to wave formation
at top speed: 64 percent


Estimated hull characteristics and strength:

Relative underwater volume absorbed by
magazines and engineering spaces: 181 percent

Relative accommodation and working space: 93 percent


Displacement factor: 71 percent
(Displacement relative to loading factors)


Relative cross-sectional hull strength: 0.58
(Structure weight per square
metre of hull surface: 228 kg)

Relative longitudinal hull strength: 1.34
(for 4.80 m average freeboard;
freeboard adjustment +1.32 m)

Relative composite hull strength: 0.63

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


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

393.60 x 39.36 x 13.78; 15.74 -- Dimensions
0.40 -- Block coefficient
1932 -- Year laid down
33.44 / 7500 / 12.00; Oil-fired turbine or equivalent -- Speed / radius / cruise
70 tons -- Miscellaneous weights
++++++++++
6 x 5.51; 0 -- Main battery; turrets
Central positioning of guns
Gun-shields
:
8 x 1.38; 0 -- Secondary battery; turrets
Gun-shields
:
4 x 0.59 -- Tertiary (QF/AA) battery
Gun-shields
:
0 -- No fourth (light) battery
8 / 0 / 20.98 -- TT / submerged / size
++++++++++
0.00 -- No belt armor
0.00 / 1.18 -- Deck / CT
1.18 / 0.79 / 0.79 / 0.00 -- Battery armor


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


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

Here we go:

Much better than the earlier Indian designs. She looks far less top heavy than the previous 2 ships. Not sure about the folding canvas hangar though, it might not really be worth the effort when tarps can be tied down over the engine and cockpit.