WesWorld

Quoted

Originally posted by Swamphen

Quoted

Breech loading guns in deck mounts
on centreline ends, evenly spread, 2 deck mounts superfiring, one aft-one forward

Is this something new in the latest x.x.# of 'Sharp? I haven't seen that before... :-?


Anyhoo: using old guns saves building time, not materials (=1 month saved for main battery, 1 month for secondaries, maximum 2 months saved).

Just learning. My fault.

A DP armed light cruiser.

Cali, Colombia Light Cruiser laid down 1935

Displacement:
5,411 t light; 5,584 t standard; 6,400 t normal; 7,052 t full load

Dimensions: Length overall / water x beam x draught
510.00 ft / 510.00 ft x 56.70 ft x 16.20 ft (normal load)
155.45 m / 155.45 m x 17.28 m x 4.94 m

Armament:
8 - 5.12" / 130 mm guns (4x2 guns), 67.03lbs / 30.41kg shells, 1935 Model
Dual purpose guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts- superfiring
20 - 0.79" / 20.0 mm guns (10x2 guns), 0.24lbs / 0.11kg shells, 1935 Model
Quick firing guns in deck mounts
on side, evenly spread
Weight of broadside 541 lbs / 245 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.00" / 76 mm 310.00 ft / 94.49 m 8.00 ft / 2.44 m
Ends: Unarmoured
Main Belt covers 94 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.00" / 76 mm - 3.00" / 76 mm
2nd: 0.50" / 13 mm - -

- Armour deck: 1.50" / 38 mm, Conning tower: 3.00" / 76 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 3 shafts, 58,505 shp / 43,645 Kw = 32.00 kts
Range 8,000nm at 16.00 kts
Bunker at max displacement = 1,468 tons

Complement:
357 - 465

Cost:
£2.438 million / $9.752 million

Distribution of weights at normal displacement:
Armament: 68 tons, 1.1 %
Armour: 1,022 tons, 16.0 %
- Belts: 316 tons, 4.9 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 139 tons, 2.2 %
- Armour Deck: 545 tons, 8.5 %
- Conning Tower: 22 tons, 0.3 %
Machinery: 1,662 tons, 26.0 %
Hull, fittings & equipment: 2,659 tons, 41.5 %
Fuel, ammunition & stores: 989 tons, 15.5 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
8,119 lbs / 3,683 Kg = 121.1 x 5.1 " / 130 mm shells or 1.5 torpedoes
Stability (Unstable if below 1.00): 1.08
Metacentric height 2.5 ft / 0.8 m
Roll period: 15.1 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.15
Seaboat quality (Average = 1.00): 0.82

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.478
Length to Beam Ratio: 8.99 : 1
'Natural speed' for length: 26.06 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 86
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: 22.68 ft / 6.91 m
- Forecastle (20 %): 14.43 ft / 4.40 m
- Mid (50 %): 14.43 ft / 4.40 m
- Quarterdeck (15 %): 14.43 ft / 4.40 m
- Stern: 14.43 ft / 4.40 m
- Average freeboard: 15.09 ft / 4.60 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 93.0 %
- Above water (accommodation/working, high = better): 151.2 %
Waterplane Area: 19,638 Square feet or 1,824 Square metres
Displacement factor (Displacement / loading): 131 %
Structure weight / hull surface area: 95 lbs/sq ft or 462 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.13
- Longitudinal: 1.26
- Overall: 1.14
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
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

How the poor performance problem is resolved?

More freeboard, more tonnage, and maybe a smaller engine. (try first two first.)

You've got the strength to raise your freeboard, which will PROBABLY fix the poor seaboat rating.

Quoted

Originally posted by Hrolf Hakonson
You've got the strength to raise your freeboard, which will PROBABLY fix the poor seaboat rating.

Thanks. Indeed raising the freeboard took care of the poor seaboat rating. Now the program tells me the design is undegunned. But I want to keep the ship under 5500 tons. If I put a heavier secondary array of guns it will go over that limit, am I correct?

Here is the report for the ship, fixed after Hrolf suggestion;

Cali, Colombia Light Cruiser laid down 1935

Displacement:
5,404 t light; 5,582 t standard; 6,398 t normal; 7,050 t full load

Dimensions: Length overall / water x beam x draught
510.00 ft / 510.00 ft x 56.70 ft x 16.20 ft (normal load)
155.45 m / 155.45 m x 17.28 m x 4.94 m

Armament:
8 - 5.12" / 130 mm guns (4x2 guns), 67.03lbs / 30.40kg shells, 1935 Model
Dual purpose guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts-superfiring
20 - 1.46" / 37.0 mm guns (10x2 guns), 1.55lbs / 0.70kg shells, 1935 Model
Anti-aircraft guns in deck mounts with hoists
on side, evenly spread
20 - 0.79" / 20.0 mm guns (10x2 guns), 0.24lbs / 0.11kg shells, 1935 Model
Anti-aircraft guns in deck mounts with hoists
on side, evenly spread
Weight of broadside 572 lbs / 259 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 3.00" / 76 mm 310.00 ft / 94.49 m 8.00 ft / 2.44 m
Ends: Unarmoured
Main Belt covers 94 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 3.00" / 76 mm - 3.00" / 76 mm

- Armour deck: 1.50" / 38 mm, Conning tower: 3.00" / 76 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 3 shafts, 58,486 shp / 43,631 Kw = 32.00 kts
Range 8,000nm at 16.00 kts
Bunker at max displacement = 1,468 tons

Complement:
356 - 464

Cost:
£2.453 million / $9.812 million

Distribution of weights at normal displacement:
Armament: 72 tons, 1.1 %
Armour: 1,042 tons, 16.3 %
- Belts: 316 tons, 4.9 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 159 tons, 2.5 %
- Armour Deck: 545 tons, 8.5 %
- Conning Tower: 22 tons, 0.3 %
Machinery: 1,662 tons, 26.0 %
Hull, fittings & equipment: 2,629 tons, 41.1 %
Fuel, ammunition & stores: 993 tons, 15.5 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
8,947 lbs / 4,058 Kg = 133.5 x 5.1 " / 130 mm shells or 1.5 torpedoes
Stability (Unstable if below 1.00): 1.00
Metacentric height 2.1 ft / 0.6 m
Roll period: 16.3 seconds
Steadiness - As gun platform (Average = 50 %): 87 %
- Recoil effect (Restricted arc if above 1.00): 0.26
Seaboat quality (Average = 1.00): 1.01

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.478
Length to Beam Ratio: 8.99 : 1
'Natural speed' for length: 26.06 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 86
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 (18 %): 19.00 ft / 5.79 m
- Mid (50 %): 18.50 ft / 5.64 m
- Quarterdeck (18 %): 18.50 ft / 5.64 m
- Stern: 18.50 ft / 5.64 m
- Average freeboard: 18.88 ft / 5.75 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 93.5 %
- Above water (accommodation/working, high = better): 195.7 %
Waterplane Area: 19,635 Square feet or 1,824 Square metres
Displacement factor (Displacement / loading): 130 %
Structure weight / hull surface area: 88 lbs/sq ft or 431 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.98
- Longitudinal: 1.55
- Overall: 1.02
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

And here is a design for a light cruiser build to fit in the available docks in Colombia. Feel free to give your opinions. Part of the learning process.


Cali, Colombia Light Cruiser laid down 1935

Displacement:
7,216 t light; 7,538 t standard; 8,503 t normal; 9,275 t full load

Dimensions: Length overall / water x beam x draught
550.00 ft / 550.00 ft x 61.65 ft x 21.46 ft (normal load)
167.64 m / 167.64 m x 18.79 m x 6.54 m

Armament:
12 - 6.00" / 152 mm guns (4x3 guns), 108.00lbs / 48.99kg shells, 1935 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts-superfiring
3 - 6.00" / 152 mm guns (1x3 guns), 108.00lbs / 48.99kg shells, 1935 Model
Breech loading guns in a turret (on a barbette)
on centreline amidships
8 - 3.00" / 76.2 mm guns (4x2 guns), 13.50lbs / 6.12kg shells, 1935 Model
Dual purpose guns in deck mounts
on side, evenly spread
20 - 0.79" / 20.0 mm guns (10x2 guns), 0.24lbs / 0.11kg shells, 1935 Model
Anti-aircraft guns in deck mounts with hoists
on side, evenly spread
Weight of broadside 1,733 lbs / 786 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.00" / 102 mm 325.00 ft / 99.06 m 8.00 ft / 2.44 m
Ends: Unarmoured
Main Belt covers 91 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 4.00" / 102 mm - 4.00" / 102 mm
2nd: 4.00" / 102 mm - 4.00" / 102 mm
3rd: 0.50" / 13 mm - -

- Armour deck: 2.00" / 51 mm, Conning tower: 4.00" / 102 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 65,020 shp / 48,505 Kw = 32.00 kts
Range 8,000nm at 16.00 kts
Bunker at max displacement = 1,737 tons

Complement:
442 - 575

Cost:
£3.529 million / $14.114 million

Distribution of weights at normal displacement:
Armament: 217 tons, 2.5 %
Armour: 1,660 tons, 19.5 %
- Belts: 442 tons, 5.2 %
- Torpedo bulkhead: 0 tons, 0.0 %
- Armament: 376 tons, 4.4 %
- Armour Deck: 806 tons, 9.5 %
- Conning Tower: 36 tons, 0.4 %
Machinery: 1,847 tons, 21.7 %
Hull, fittings & equipment: 3,492 tons, 41.1 %
Fuel, ammunition & stores: 1,288 tons, 15.1 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
10,306 lbs / 4,675 Kg = 95.4 x 6.0 " / 152 mm shells or 1.7 torpedoes
Stability (Unstable if below 1.00): 1.00
Metacentric height 2.4 ft / 0.7 m
Roll period: 16.6 seconds
Steadiness - As gun platform (Average = 50 %): 81 %
- Recoil effect (Restricted arc if above 1.00): 0.46
Seaboat quality (Average = 1.00): 1.02

Hull form characteristics:
Hull has a flush deck
and transom stern
Block coefficient: 0.409
Length to Beam Ratio: 8.92 : 1
'Natural speed' for length: 27.36 kts
Power going to wave formation at top speed: 56 %
Trim (Max stability = 0, Max steadiness = 100): 79
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: 25.80 ft / 7.86 m
- Forecastle (20 %): 16.42 ft / 5.00 m
- Mid (50 %): 16.42 ft / 5.00 m
- Quarterdeck (15 %): 16.42 ft / 5.00 m
- Stern: 16.42 ft / 5.00 m
- Average freeboard: 17.17 ft / 5.23 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 90.7 %
- Above water (accommodation/working, high = better): 154.1 %
Waterplane Area: 21,781 Square feet or 2,024 Square metres
Displacement factor (Displacement / loading): 120 %
Structure weight / hull surface area: 105 lbs/sq ft or 512 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.95
- Longitudinal: 1.53
- Overall: 1.00
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

If your hull strength is over 1.00, SS will claim that the design is undergunned. That's all, not important really. You might add a few (6- torpedoes to the DP cruiser as well, make a useful additional weapon if it's confronted by a larger, better armored ship.

The second cruiser design has an unrealisticly low block coefficient, for a cruiser .45 is about the minimum and .47+ is more reasonable.