WesWorld

Tried fiddling with springstyle a bit. I wish I could get sharp working again. -_-



Icebreaker, laid down 1931

Length, 150.0 m x Beam, 25.0 m x Depth, 4.0 m
9830 tonnes normal displacement (8829 tonnes standard)

Main battery: 4 x 14.0-cm (3 turrets)
AA battery: 16 x 4.0-cm
Light battery: 8 x 2.0-cm

Weight of broadside: 167 kg

Hull unarmored

Battery armor:
Main, 7.5 cm


Maximum speed for 12656 shaft kw = 20.00 knots
Approximate cruising radius, 11900 nm / 12 knots

Typical complement: 494-642


Estimated cost, $7.169 million (£1.792 million)

Remarks:

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

Good seaboat; rides out heavy weather easily.

Magazines and engineering spaces are roomy, with superior
watertight subdivision.

Ship is roomy, with superior accommodation and working space.


Distribution of weights:
Percent
normal
displacement:

Armament ......................... 46 tonnes = 0 pct
Armor, total ..................... 113 tonnes = 1 pct

Armament 113 tonnes = 1 pct

Machinery ........................ 507 tonnes = 5 pct
Hull and fittings; equipment ..... 6935 tonnes = 71 pct
Fuel, ammunition, stores ......... 1229 tonnes = 13 pct
Miscellaneous weights ............ 1000 tonnes = 10 pct
-----
9830 tonnes = 100 pct

Estimated metacentric height, 1.3 m

Displacement summary:

Light ship: 8601 tonnes
Standard displacement: 8829 tonnes
Normal service: 9830 tonnes
Full load: 10592 tonnes

Loading submergence 2833 tonnes/metre

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


Estimated overall survivability and seakeeping ability:

Relative margin of stability: 1.10

Shellfire needed to sink: 19373 kg = 509.1 x 14.0-cm shells
(Approximates weight of penetrating
shell hits needed to sink ship,
not counting critical hits)

Torpedoes needed to sink: 7.3
(Approximates number of 'typical'
torpedo hits needed to sink ship)

Relative steadiness as gun platform, 100 percent
(50 percent is 'average')

Relative rocking effect from firing to beam, 0.05

Relative quality as a seaboat: 1.47

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


Hull form characteristics:

Block coefficient: 0.65
Sharpness coefficient: 0.45
Hull speed coefficient 'M' = 7.02
'Natural speed' for length = 22.2 knots
Power going to wave formation
at top speed: 43 percent


Estimated hull characteristics and strength:

Relative underwater volume absorbed by
magazines and engineering spaces: 33 percent

Relative accommodation and working space: 230 percent


Displacement factor: 396 percent
(Displacement relative to loading factors)


Relative cross-sectional hull strength: 1.93
(Structure weight per square
metre of hull surface: 877 kg)

Relative longitudinal hull strength: 2.64
(for 6.00 m average freeboard;
freeboard adjustment +1.40 m)

Relative composite hull strength: 1.99

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


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

492.00 x 82.00 x 13.12; 19.68 -- Dimensions
0.65 -- Block coefficient
1931 -- Year laid down
20.00 / 11900 / 12.00; Oil-fired turbine or equivalent -- Speed / radius / cruise
1000 tons -- Miscellaneous weights
++++++++++
4 x 5.51; 3; 0 -- Main battery; turrets; superfiring
:
0 -- No secondary battery
16 x 1.57 -- Tertiary (QF/AA) battery
:
8 x 0.79 -- Fourth (light) battery
0 -- No torpedo armament
++++++++++
0.00 -- No belt armor
0.00 / 0.00 -- Deck / CT
2.95 / 0.00 / 0.00 / 0.00 -- Battery armor


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


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

For an icebreaker, wouldn't you want some belt and end armor, to sim the thickened hull and extra strengthening vs ice?

heres the Russian Arctica class, with belt and end armor and a torpedo bulkhead. That TB came in handy when Laptev Sea got hung up on a thick pressure ridge and damaged her hull, a few years back:

Arctica class Icebreakers, laid down 1922
Length, 170.0 m x Beam, 33.0 m x Depth, 5.5 m
15243 tonnes normal displacement (11075 tonnes standard)
Main battery: 4 x 13.0-cm (2 x 2)
AA battery: 8 x 3.7-cm
Light battery: 4 x 1.3-cm
Weight of broadside: 128 kg
Main belt, 5.0 cm; bow and stern, 10.0 cm
Torpedo bulkhead, 10.0 cm
Battery armor:
Main, 2.5 cm
AA, 2.5 cm shields
Aircraft - 3 Sea/Skiplanes, 1 Catapult
Cargo - 1000 tons
Maximum speed for 21312 shaft kw = 20.00 knots
Approximate cruising radius, 22200 nm / 15 knots
Typical complement: 343-446
Estimated cost, $5.905 million (£1.476 million)
Remarks:
Relative extent of belt armor, 50 percent of 'typical' coverage.
Good seaboat; rides out heavy weather easily.
Magazines and engineering spaces are roomy, with superior
watertight subdivision.
Ship is roomy, with superior accommodation and working space.
Distribution of weights:
Percent
normal
displacement:
Armament ......................... 35 tonnes = 0 pct
Armor, total ..................... 1362 tonnes = 9 pct
Belt 377 tonnes = 2 pct
Torpedo bulkhead 953 tonnes = 6 pct
Armament 31 tonnes = 0 pct
Machinery ........................ 969 tonnes = 6 pct
Hull and fittings; equipment ..... 7306 tonnes = 48 pct
Fuel, ammunition, stores ......... 4496 tonnes = 29 pct
Miscellaneous weights ............ 1075 tonnes = 7 pct
-----
15243 tonnes = 100 pct
Estimated metacentric height, 5.1 m
Displacement summary:
Light ship: 10747 tonnes
Standard displacement: 11075 tonnes
Normal service: 15243 tonnes
Full load: 18517 tonnes
Loading submergence 3507 tonnes/metre
+++++++++++++++++++++++++
Estimated overall survivability and seakeeping ability:
Relative margin of stability: 1.99
Shellfire needed to sink: 27097 kg = 888.3 x 13.0-cm shells
(Approximates weight of penetrating
shell hits needed to sink ship,
not counting critical hits)
Torpedoes needed to sink: 18.4
(Approximates number of 'typical'
torpedo hits needed to sink ship)
Relative steadiness as gun platform, 47 percent
(50 percent is 'average')
Relative rocking effect from firing to beam, 0.00
Relative quality as a seaboat: 1.21
+++++++++++++++++++++++++
Hull form characteristics:
Block coefficient: 0.49
Sharpness coefficient: 0.41
Hull speed coefficient 'M' = 6.88
'Natural speed' for length = 23.6 knots
Power going to wave formation
at top speed: 44 percent
Estimated hull characteristics and strength:
Relative underwater volume absorbed by
magazines and engineering spaces: 39 percent
Relative accommodation and working space: 171 percent
Displacement factor: 327 percent
(Displacement relative to loading factors)
Relative cross-sectional hull strength: 1.50
(Structure weight per square
metre of hull surface: 783 kg)
Relative longitudinal hull strength: 1.50
(for 5.02 m average freeboard)
Relative composite hull strength: 1.50
+++++++++++++++++++++++++
[Machine-readable parameters: Spring Style v. 1.2.1]
557.60 x 108.24 x 18.04; 16.47 -- Dimensions
0.49 -- Block coefficient
1922 -- Year laid down
20.00 / 22200 / 15.00; Oil-fired turbine or equivalent -- Speed / radius / cruise
1075 tons -- Miscellaneous weights
++++++++++
4 x 5.12; 2; 0 -- Main battery; turrets; superfiring
:
0 -- No secondary battery
8 x 1.46 -- Tertiary (QF/AA) battery
Gun-shields
:
4 x 0.51 -- Fourth (light) battery
0 -- No torpedo armament
++++++++++
1.97 / 3.94 / 0.00 / 3.94; 50 -- Belt armor; relative extent
0.00 / 0.00 -- Deck / CT
0.98 / 0.00 / 0.98 / 0.00 -- Battery armor
(Note: For portability, values are stored in Anglo-American units)
+++++++++++++++++++++++++++++++++++++++++++++++++++++++

Quoted

Originally posted by Hrolf Hakonson
For an icebreaker, wouldn't you want some belt and end armor, to sim the thickened hull and extra strengthening vs ice?

I couldn't figure out how to get end armour with it. And since you can't go back and fiddle with things without scrolling through the whole report, I kinda lost interest. -_-

When you enter main belt as '0', it immediately skips the end belts and upper belt and then it is a real pain to get back to that point with Style.

How's this?


IB31C, laid down 1931

Length, 492 ft x Beam, 82.0 ft x Depth, 13.1 ft
9830 tons normal displacement (8820 tons standard)

Main battery: 4 x 140mm (3 turrets)
AA battery: 16 x 40mm
Light battery: 8 x 20mm

Weight of broadside: 367 lbs

Main belt, 75mm ; bow and stern, 100mm

Battery armor:
Main, 75mm


Maximum speed for 17000 shp = 20.01 knots
Approximate cruising radius, 12000 nm / 12 kts

Typical complement: 494-642


Estimated cost, $7.165 million (£1.791 million)

Remarks:

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

Good seaboat; rides out heavy weather easily.

Magazines and engineering spaces are roomy, with superior
watertight subdivision.

Ship is roomy, with superior accommodation and working space.


Distribution of weights:
Percent
normal
displacement:

Armament ......................... 46 tons = 0 pct
Armor, total ..................... 833 tons = 8 pct

Belt 720 tons = 7 pct
Armament 113 tons = 1 pct

Machinery ........................ 508 tons = 5 pct
Hull and fittings; equipment ..... 6206 tons = 63 pct
Fuel, ammunition, stores ......... 1237 tons = 13 pct
Miscellaneous weights ............ 1000 tons = 10 pct
-----
9830 tons = 100 pct

Estimated metacentric height, 5.9 ft

Displacement summary:

Light ship: 8593 tons
Standard displacement: 8820 tons
Normal service: 9830 tons
Full load: 10599 tons

Loading submergence 864 tons/foot

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


Estimated overall survivability and seakeeping ability:

Relative margin of stability: 1.29

Shellfire needed to sink: 46310 lbs = 553.7 x 5.5-inch shells
(Approximates weight of penetrating
shell hits needed to sink ship,
not counting critical hits)

Torpedoes needed to sink: 7.4
(Approximates number of 'typical'
torpedo hits needed to sink ship)

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

Relative rocking effect from firing to beam, 0.03

Relative quality as a seaboat: 1.41

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


Hull form characteristics:

Block coefficient: 0.65
Sharpness coefficient: 0.45
Hull speed coefficient 'M' = 7.02
'Natural speed' for length = 22.2 knots
Power going to wave formation
at top speed: 43 percent


Estimated hull characteristics and strength:

Relative underwater volume absorbed by
magazines and engineering spaces: 33 percent

Relative accommodation and working space: 230 percent


Displacement factor: 307 percent
(Displacement relative to loading factors)


Relative cross-sectional hull strength: 1.73
(Structure weight per square
foot of hull surface: 160 lbs)

Relative longitudinal hull strength: 2.18
(for 19.7 ft average freeboard;
freeboard adjustment +4.6 ft)

Relative composite hull strength: 1.77

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


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

492.00 x 82.00 x 13.12; 19.68 -- Dimensions
0.65 -- Block coefficient
1931 -- Year laid down
20.01 / 12000 / 12.00; Oil-fired turbine or equivalent -- Speed / radius / cruise
1000 tons -- Miscellaneous weights
++++++++++
4 x 5.51; 3; 0 -- Main battery; turrets; superfiring
:
0 -- No secondary battery
16 x 1.57 -- Tertiary (QF/AA) battery
:
8 x 0.79 -- Fourth (light) battery
0 -- No torpedo armament
++++++++++
2.95 / 3.94 / 0.00 / 0.00; 100 -- Belt armor; relative extent
0.00 / 0.00 -- Deck / CT
2.95 / 0.00 / 0.00 / 0.00 -- Battery armor


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

I was reading a short piece on icebreakers earlier this week. It seems that the specialised bow shape (maeirform) for breaking ice decreases the efficiency of the hullform by about 40%. Icebreakers need all that bunkerage just for general travel. A solution being taken up is to break the ice with the stern of the ship. The propellors will be mounted in azipods. Tests show that using the stern, in combination with the propellors, that you can break through a considerably more ice.

I've got to ask; why use an icebreaker? What is it for? Does Halifax get iced up at all? Its worth noting that Hudson Bay is icelocked today, well just beggining to thaw enough. Similarly for Russia's Northern Route. The Minimum extent of summer pack ice still encompasses all of Severnaya Zemla and up to the continent. Thats today. In 1930, it would be considerably worse.

Honestly? I was just fiddling with springstyle on something useless to try and get a feel for it.

Canada most certainly needs Icebreakers for the more constricted waterways such as the St. Lawrence and the Great Lakes.

I think I'll wait until I'm able to get a new computer (and run SSharp) for doing SS reports on my own. <_<

Well if the RCN would consider ordering a "Pacifica" type icebreaker, the Philippines would consider selling one... ;-)

"Scuttling charges" no extra charge. ^_^

Here is what Australia has planned for that role. Actually this is more of a "Antartic research ship".


HMS Shackleton, Australia Icebreaker laid down 1931

Displacement:
4,629 t light; 4,801 t standard; 6,903 t normal; 8,585 t full load

Dimensions: Length overall / water x beam x draught
420.00 ft / 420.00 ft x 59.00 ft x 15.00 ft (normal load)
128.02 m / 128.02 m x 17.98 m x 4.57 m

Armament:
3 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1931 Model
Breech loading guns in deck mounts
on centreline ends, majority forward, 1 raised mount
4 - 2.95" / 75.0 mm guns (2x2 guns), 12.87lbs / 5.84kg shells, 1931 Model
Dual purpose guns in deck mounts
on centreline, all aft, all raised mounts - superfiring
4 - 1.57" / 40.0 mm guns (2x2 guns), 1.95lbs / 0.88kg shells, 1931 Model
Anti-aircraft guns in deck mounts
on centreline, all amidships, all raised mounts - superfiring
4 - 0.79" / 20.0 mm guns in single mounts, 0.24lbs / 0.11kg shells, 1931 Model
Machine guns in deck mounts
on side, evenly spread
Weight of broadside 384 lbs / 174 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2.00" / 51 mm 270.00 ft / 82.30 m 10.00 ft / 3.05 m
Ends: 4.00" / 102 mm 150.00 ft / 45.72 m 10.00 ft / 3.05 m
Main Belt covers 99 % of normal length

- Torpedo Bulkhead:
2.00" / 51 mm 270.00 ft / 82.30 m 15.00 ft / 4.57 m

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

Machinery:
Diesel Internal combustion motors,
Geared drive, 4 shafts, 13,336 shp / 9,949 Kw = 20.00 kts
Range 20,000nm at 15.00 kts
Bunker at max displacement = 3,784 tons

Complement:
378 - 492

Cost:
£1.127 million / $4.507 million

Distribution of weights at normal displacement:
Armament: 48 tons, 0.7 %
Armour: 780 tons, 11.3 %
- Belts: 457 tons, 6.6 %
- Torpedo bulkhead: 300 tons, 4.3 %
- Armament: 24 tons, 0.3 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 399 tons, 5.8 %
Hull, fittings & equipment: 2,782 tons, 40.3 %
Fuel, ammunition & stores: 2,274 tons, 32.9 %
Miscellaneous weights: 620 tons, 9.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
27,378 lbs / 12,418 Kg = 253.5 x 6.0 " / 152 mm shells or 7.3 torpedoes
Stability (Unstable if below 1.00): 1.44
Metacentric height 4.3 ft / 1.3 m
Roll period: 12.0 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0.05
Seaboat quality (Average = 1.00): 1.61

Hull form characteristics:
Hull has low quarterdeck
Block coefficient: 0.650
Length to Beam Ratio: 7.12 : 1
'Natural speed' for length: 20.49 kts
Power going to wave formation at top speed: 48 %
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: 19.00 ft / 5.79 m
- Forecastle (20 %): 17.00 ft / 5.18 m
- Mid (50 %): 17.00 ft / 5.18 m
- Quarterdeck (15 %): 15.00 ft / 4.57 m (17.00 ft / 5.18 m before break)
- Stern: 15.00 ft / 4.57 m
- Average freeboard: 16.86 ft / 5.14 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 53.5 %
- Above water (accommodation/working, high = better): 162.6 %
Waterplane Area: 18,983 Square feet or 1,764 Square metres
Displacement factor (Displacement / loading): 267 %
Structure weight / hull surface area: 104 lbs/sq ft or 507 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.36
- Longitudinal: 1.80
- Overall: 1.40
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