WesWorld

Filipino Romblon-class light cruiser, laid down 1931

Displacement:
5,576 t light; 5,876 t standard; 6,676 t normal; 7,316 t full load

Dimensions: Length overall / water x beam x draught
562.60 ft / 547.08 ft x 54.79 ft x 14.44 ft (normal load)
171.48 m / 166.75 m x 16.70 m x 4.40 m

Armament:
9 - 6.10" / 155 mm guns (3x3 guns), 120.00lbs / 54.43kg shells, 1931 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
8 - 3.94" / 100 mm guns (4x2 guns), 32.00lbs / 14.51kg shells, 1931 Model
Dual purpose guns in deck mounts with hoists
on side ends, evenly spread
2 - 3.94" / 100 mm guns (1x2 guns), 32.00lbs / 14.51kg shells, 1931 Model
Dual purpose guns in a deck mount with hoist
on centreline aft, all raised guns - superfiring
12 - 0.98" / 25.0 mm guns (4x3 guns), 0.57lbs / 0.26kg shells, 1931 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts
12 - 0.54" / 13.7 mm guns in single mounts, 0.11lbs / 0.05kg shells, 1931 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts

Weight of broadside 1,408 lbs / 639 kg
Shells per gun, main battery: 200

12 - 24.0" / 610 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2.56" / 65 mm 390.42 ft / 119.00 m 9.84 ft / 3.00 m
Ends: Unarmoured
Main Belt covers 110 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.15" / 80 mm 1.97" / 50 mm 2.56" / 65 mm
2nd: 1.18" / 30 mm 0.59" / 15 mm 0.98" / 25 mm
3rd: 1.18" / 30 mm 0.59" / 15 mm 0.98" / 25 mm
4th: 0.59" / 15 mm - -

- Armour deck: 1.18" / 30 mm, Conning tower: 3.15" / 80 mm

Machinery:
Oil fired boilers, steam turbines plus diesel motors,
Geared drive, 3 shafts, 60,686 shp / 45,272 Kw = 32.00 kts
Range 8,250nm at 15.00 kts (Bunkerage = 1,439 tons)

Complement:
369 - 480

Cost:
£2.572 million / $10.287 million

Distribution of weights at normal displacement:
Armament: 167 tons, 2.5 %
Armour: 1,110 tons, 16.6 %
- Belts: 404 tons, 6.1 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 210 tons, 3.1 %
- Armour Deck: 471 tons, 7.1 %
- Conning Tower: 24 tons, 0.4 %
Machinery: 1,815 tons, 27.2 %
Hull, fittings & equipment: 2,410 tons, 36.1 %
Fuel, ammunition & stores: 1,100 tons, 16.5 %
Miscellaneous weights: 75 tons, 1.1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
6,214 lbs / 2,819 Kg = 54.7 x 6.1 " / 155 mm shells or 1.1 torpedoes
Stability (Unstable if below 1.00): 1.13
Metacentric height 2.5 ft / 0.8 m
Roll period: 14.4 seconds
Steadiness - As gun platform (Average = 50 %): 70 %
- Recoil effect (Restricted arc if above 1.00): 0.63
Seaboat quality (Average = 1.00): 1.05

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.540
Length to Beam Ratio: 9.99 : 1
'Natural speed' for length: 26.58 kts
Power going to wave formation at top speed: 58 %
Trim (Max stability = 0, Max steadiness = 100): 67
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 26.25 ft / 8.00 m
- Forecastle (14 %): 22.47 ft / 6.85 m
- Mid (65 %): 21.00 ft / 6.40 m (13.94 ft / 4.25 m aft of break)
- Quarterdeck (14 %): 13.94 ft / 4.25 m
- Stern: 13.94 ft / 4.25 m
- Average freeboard: 19.33 ft / 5.89 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 109.7 %
- Above water (accommodation/working, high = better): 138.6 %
Waterplane Area: 21,571 Square feet or 2,004 Square metres
Displacement factor (Displacement / loading): 109 %
Structure weight / hull surface area: 73 lbs/sq ft or 358 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.72
- Longitudinal: 1.09
- Overall: 0.75
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform

That's about what I intend to reconstruct the Pallada class into, at about the same time.

Doesn't look like anything special really. And it counts as a heavy cruiser because of those 155mm guns.

True but there are two things:
1) can you see the difference between a 155mm and a 152mm guns? *sabotages Italian measuring tape*
2) Swamphen hopes that with the next treaty talks the limit will be slightly increased to allow 155mm guns on light cruisers.

3) The Filipinos are getting skilled at using barrel liners to reduce internal volume to treaty levels.

Also, there is always the possibility of this nation removing itself from the treaty based on any number of reasons. From feeling like they are being treated unfairly, to conflict of interest between nations (war that is), or simply wanting out. There are always possibilities.

Chile sees this possibility and is taking steps to protect our side of the Pacific should the Filipinos decided they want to expand through force of arms rather than negotiations with the League.

(And yes Mr. Oyama will take out any bounties on your Attorney Drones should you use them for negotiations.)

Quoted

Also, there is always the possibility of this nation removing itself from the treaty based on any number of reasons. From feeling like they are being treated unfairly, to conflict of interest between nations (war that is), or simply wanting out. There are always possibilities.

Wow... two of those possibilities apply to me! :-)

Hmmm....Just the Filipinos....I could defend against that I think. Especially if they can't bring the MAS boats with them. I don't know how many of these light cruisers are planned, but I think Chile's new "light" cruisers will be able to handle them even with only 150mm guns.

(Statistically, what is the difference between 5.9 , 6, and 6.1 inch guns of roughly the same length?)

However, Japan is something else. That would require substantially more firepower then I have avalible at this time, and more industrial product then is currently possible.

Plan C?

Quoted

However, Japan is something else. That would require substantially more firepower then I have avalible at this time, and more industrial product then is currently possible.

Believe me... a lot more...

Theres always a bigger fish....

I think I know these bigger fish. They speak with many voices but hammer with a single BIG stick when angry. They live north of Chile if I recall.

Sometimes groups of smaller fish form in order to perform certain tasks as well, like mutual defence or agression depending on the fish.

1) See the difference? No, but i'll ask to measure it after unconfirmed reports indicate that the guns are larger than 153mm.

2) Some countries might not want to accede to the Philipino's demands.

Look at the design, its a similar size to 1925 Condottieri I. It carries a similar armament, has worse armour and is 2knts slower.

Quoted

Look at the design, its a similar size to 1925 Condottieri I. It carries a similar armament, has worse armour and is 2knts slower.

This vessel seem to be able to survive longer than the 1925 Condottieri by nearly 20 shells of 6 inch size. It also seems to have a larger number of 100mm, lighter guns, and torpedoes compared to the Italian vessel.

The armor is marginally worse then the Italian vessel in terms of thickness and length, but not height. Marginal being 5 millimeters....not what I'd call tactically superior given that we are talking the difference between 65 and 70 mm of armor on the belt and 30 and 35 mm on the deck. This cruiser's conning tower armor is 80 mm to the Italian 70 mm. A centimeter I can see as starting to matter in the general dynamics of naval warfare.

But that is just me, and I'm a little young to know everything there is to know. But I'm attempting to learn.

I cannot confirm or deny any future intentions torwards the Treaty by the Filipinos. ^_^

If these ships are built under the Treaty without revisions, the guns' liners will be set to 152mm.

Of course, if there is no Treaty for the pesky Phils to observe, we might not use 155mm guns at all... :-)

Quoted

Look at the design, its a similar size to 1925 Condottieri I. It carries a similar armament, has worse armour and is 2knts slower.

...and the Philippines has considerably less experience than the Italians at building warships.


This design actually started out as a clone of OTL Leipzig/Nurnburg, BTW.

This design's block co-efficient (0.54) is quite high for a six thousand ton fast cruiser, I think. That and the much lesser draught (about 1.5 m less than a Condotierri) would account for much of the difference in performance between the two designs.

Given her speed of 32 knots, I'm surprised nobody's questioned the transom stern.

Not a bad little design. But why post her while we're in 1927?

Quoted

This design's block co-efficient (0.54) is quite high for a six thousand ton fast cruiser, I think.

I wondered about that myself, but that's what I needed when I entered the dimensions for Leipzig.

Quoted

Given her speed of 32 knots, I'm surprised nobody's questioned the transom stern.

Because it's a 1931 design.

Quoted

But why post her while we're in 1927?

Because I could. :-)

Quoted

But why post her while we're in 1927?

He's attempting to intimidate some of us?

Quoted

He's attempting to intimidate some of us?

Whom, moi? ^_^

Quoted

(And yes Mr. Oyama will take out any bounties on your Attorney Drones should you use them for negotiations.)

"Those not wearing body armor are hereby advised to keep their arguments on-topic."

:-)

Played around with draft and BC some. Changing to a BC of .48 and a draft of 4.95m allowed me not only to keep what I had - with a more efficient hull - but tweak a bit: armour is now 75mm belt + 35mm deck, speed increased by .05kt, and I now have the Good Seakeeping seal of approval. :-)

(full sim will be posted in the morning)

Filipino Romblon-class light cruiser, laid down 1931

Displacement:
5,588 t light; 5,888 t standard; 6,676 t normal; 7,306 t full load

Dimensions: Length overall / water x beam x draught
562.60 ft / 547.08 ft x 54.79 ft x 16.24 ft (normal load)
171.48 m / 166.75 m x 16.70 m x 4.95 m

Armament:
9 - 6.10" / 155 mm guns (3x3 guns), 120.00lbs / 54.43kg shells, 1931 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, majority forward, 1 raised mount - superfiring
8 - 3.94" / 100 mm guns (4x2 guns), 32.00lbs / 14.51kg shells, 1931 Model
Dual purpose guns in deck mounts with hoists
on side ends, evenly spread
2 - 3.94" / 100 mm guns (1x2 guns), 32.00lbs / 14.51kg shells, 1931 Model
Dual purpose guns in a deck mount with hoist
on centreline aft, all raised guns - superfiring
12 - 0.98" / 25.0 mm guns (4x3 guns), 0.57lbs / 0.26kg shells, 1931 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
12 - 0.54" / 13.7 mm guns in single mounts, 0.11lbs / 0.05kg shells, 1931 Model
Machine guns in deck mounts
on side, evenly spread, all raised mounts

Weight of broadside 1,408 lbs / 639 kg
Shells per gun, main battery: 200

12 - 24.0" / 610 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2.95" / 75 mm 380.58 ft / 116.00 m 9.84 ft / 3.00 m
Ends: Unarmoured
Main Belt covers 107 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.15" / 80 mm 1.97" / 50 mm 2.56" / 65 mm
2nd: 1.18" / 30 mm 0.59" / 15 mm 0.98" / 25 mm
3rd: 1.18" / 30 mm - -
4th: 0.59" / 15 mm - -

- Armour deck: 1.38" / 35 mm, Conning tower: 3.15" / 80 mm

Machinery:
Oil fired boilers, steam turbines plus diesel motors,
Geared drive, 3 shafts, 58,727 shp / 43,810 Kw = 32.05 kts
Range 8,250nm at 15.00 kts (Bunkerage = 1,418 tons)

Complement:
369 - 480

Cost:
£2.538 million / $10.151 million

Distribution of weights at normal displacement:
Armament: 167 tons, 2.5 %
Armour: 1,210 tons, 18.1 %
- Belts: 455 tons, 6.8 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 211 tons, 3.2 %
- Armour Deck: 520 tons, 7.8 %
- Conning Tower: 24 tons, 0.4 %
Machinery: 1,756 tons, 26.3 %
Hull, fittings & equipment: 2,380 tons, 35.6 %
Fuel, ammunition & stores: 1,088 tons, 16.3 %
Miscellaneous weights: 75 tons, 1.1 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
6,363 lbs / 2,886 Kg = 56.0 x 6.1 " / 155 mm shells or 1.2 torpedoes
Stability (Unstable if below 1.00): 1.16
Metacentric height 2.7 ft / 0.8 m
Roll period: 14.1 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.62
Seaboat quality (Average = 1.00): 1.20

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.480
Length to Beam Ratio: 9.99 : 1
'Natural speed' for length: 26.76 kts
Power going to wave formation at top speed: 57 %
Trim (Max stability = 0, Max steadiness = 100): 59
Bow angle (Positive = bow angles forward): 25.00 degrees
Stern overhang: 3.28 ft / 1.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 26.25 ft / 8.00 m
- Forecastle (15 %): 22.64 ft / 6.90 m
- Mid (65 %): 21.16 ft / 6.45 m (14.11 ft / 4.30 m aft of break)
- Quarterdeck (15 %): 14.11 ft / 4.30 m
- Stern: 14.11 ft / 4.30 m
- Average freeboard: 19.50 ft / 5.94 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 106.9 %
- Above water (accommodation/working, high = better): 132.4 %
Waterplane Area: 20,390 Square feet or 1,894 Square metres
Displacement factor (Displacement / loading): 109 %
Structure weight / hull surface area: 73 lbs/sq ft or 358 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.71
- Longitudinal: 1.22
- Overall: 0.75
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily