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1

Saturday, August 29th 2015, 7:40pm

Experimenting with Springsharp

Well after MANY attempts on learning how springsharp works and not letting my mind go to other places managed to do some ships, comments are appreciated. Here is the first.

Lima, Peruvian Battle Cruiser laid down 1943

Displacement:
31,590 t light; 33,028 t standard; 34,906 t normal; 36,408 t full load

Dimensions: Length overall / water x beam x draught
787.40 ft / 787.40 ft x 91.86 ft x 29.53 ft (normal load)
240.00 m / 240.00 m x 28.00 m x 9.00 m

Armament:
12 - 11.14" / 283 mm guns (4x3 guns), 691.56lbs / 313.69kg shells, 1943 Model
Breech loading guns in turrets (on barbettes)
on centreline ends, evenly spread
8 - 4.72" / 120 mm guns (4x2 guns), 52.72lbs / 23.92kg shells, 1943 Model
Dual purpose guns in turrets (on barbettes)
on side ends, evenly spread
16 - 1.57" / 40.0 mm guns (4x4 guns), 1.95lbs / 0.89kg shells, 1943 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
32 - 0.79" / 20.0 mm guns (8x4 guns), 0.24lbs / 0.11kg shells, 1943 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 8,760 lbs / 3,973 kg
Shells per gun, main battery: 150

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 7.87" / 200 mm 511.81 ft / 156.00 m 11.52 ft / 3.51 m
Ends: Unarmoured
Upper: 2.36" / 60 mm 511.81 ft / 156.00 m 8.01 ft / 2.44 m
Main Belt covers 100 % of normal length

- Torpedo Bulkhead:
2.17" / 55 mm 511.81 ft / 156.00 m 27.46 ft / 8.37 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 9.84" / 250 mm - 9.84" / 250 mm
2nd: 4.13" / 105 mm - 4.13" / 105 mm
3rd: 0.79" / 20 mm - -
4th: 0.59" / 15 mm - -

- Armour deck: 3.94" / 100 mm, Conning tower: 3.15" / 80 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 171,915 shp / 128,248 Kw = 32.00 kts
Range 12,000nm at 12.00 kts
Bunker at max displacement = 3,380 tons

Complement:
1,276 - 1,659

Cost:
£17.326 million / $69.303 million

Distribution of weights at normal displacement:
Armament: 1,095 tons, 3.1 %
Armour: 9,249 tons, 26.5 %
- Belts: 2,376 tons, 6.8 %
- Torpedo bulkhead: 1,126 tons, 3.2 %
- Armament: 1,921 tons, 5.5 %
- Armour Deck: 3,753 tons, 10.8 %
- Conning Tower: 72 tons, 0.2 %
Machinery: 4,440 tons, 12.7 %
Hull, fittings & equipment: 16,806 tons, 48.1 %
Fuel, ammunition & stores: 3,316 tons, 9.5 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
52,258 lbs / 23,704 Kg = 75.6 x 11.1 " / 283 mm shells or 8.1 torpedoes
Stability (Unstable if below 1.00): 1.18
Metacentric height 6.0 ft / 1.8 m
Roll period: 15.8 seconds
Steadiness - As gun platform (Average = 50 %): 53 %
- Recoil effect (Restricted arc if above 1.00): 0.37
Seaboat quality (Average = 1.00): 0.97

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.572
Length to Beam Ratio: 8.57 : 1
'Natural speed' for length: 28.06 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 55
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: 30.87 ft / 9.41 m
- Forecastle (20 %): 19.65 ft / 5.99 m
- Mid (50 %): 19.65 ft / 5.99 m
- Quarterdeck (15 %): 19.65 ft / 5.99 m
- Stern: 19.65 ft / 5.99 m
- Average freeboard: 20.55 ft / 6.26 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 84.8 %
- Above water (accommodation/working, high = better): 151.2 %
Waterplane Area: 51,534 Square feet or 4,788 Square metres
Displacement factor (Displacement / loading): 130 %
Structure weight / hull surface area: 228 lbs/sq ft or 1,115 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.47
- Longitudinal: 1.44
- Overall: 1.45
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent
Poor seaboat, wet and uncomfortable, reduced performance in heavy weather

2

Saturday, August 29th 2015, 7:42pm

Here is the second.

Carvajal, Peruvian Light Cruiser laid down 1948

Displacement:
14,447 t light; 14,896 t standard; 15,574 t normal; 16,116 t full load

Dimensions: Length overall / water x beam x draught
688.98 ft / 688.98 ft x 68.90 ft x 22.97 ft (normal load)
210.00 m / 210.00 m x 21.00 m x 7.00 m

Armament:
12 - 5.98" / 152 mm guns (4x3 guns), 107.15lbs / 48.60kg shells, 1948 Model
Dual purpose guns in turrets (on barbettes)
on centreline ends, evenly spread, 2 raised mounts - superfiring
16 - 2.99" / 76.0 mm guns (8x2 guns), 13.39lbs / 6.08kg shells, 1948 Model
Automatic rapid fire guns in deck mounts with hoists
on side, evenly spread
24 - 1.57" / 40.0 mm guns (6x4 guns), 1.95lbs / 0.89kg shells, 1948 Model
Anti-aircraft guns in deck mounts
on side, evenly spread
Weight of broadside 1,547 lbs / 702 kg
Shells per gun, main battery: 150
6 - 25.6" / 650 mm above water torpedoes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.72" / 120 mm 447.83 ft / 136.50 m 9.48 ft / 2.89 m
Ends: Unarmoured
Upper: 2.76" / 70 mm 447.83 ft / 136.50 m 0.00 ft / 0.00 m
Main Belt covers 100 % of normal length

- Torpedo Bulkhead:
3.15" / 80 mm 447.83 ft / 136.50 m 20.14 ft / 6.14 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 4.72" / 120 mm - 4.72" / 120 mm
2nd: 2.17" / 55 mm - -
3rd: 0.79" / 20 mm - -

- Armour deck: 2.95" / 75 mm, Conning tower: 4.72" / 120 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 104,538 shp / 77,986 Kw = 32.00 kts
Range 7,100nm at 12.00 kts
Bunker at max displacement = 1,220 tons

Complement:
696 - 906

Cost:
£7.680 million / $30.720 million

Distribution of weights at normal displacement:
Armament: 199 tons, 1.3 %
Armour: 4,134 tons, 26.5 %
- Belts: 835 tons, 5.4 %
- Torpedo bulkhead: 1,051 tons, 6.8 %
- Armament: 457 tons, 2.9 %
- Armour Deck: 1,728 tons, 11.1 %
- Conning Tower: 63 tons, 0.4 %
Machinery: 2,555 tons, 16.4 %
Hull, fittings & equipment: 7,259 tons, 46.6 %
Fuel, ammunition & stores: 1,127 tons, 7.2 %
Miscellaneous weights: 300 tons, 1.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
26,666 lbs / 12,095 Kg = 248.9 x 6.0 " / 152 mm shells or 4.7 torpedoes
Stability (Unstable if below 1.00): 1.20
Metacentric height 4.0 ft / 1.2 m
Roll period: 14.4 seconds
Steadiness - As gun platform (Average = 50 %): 55 %
- Recoil effect (Restricted arc if above 1.00): 0.21
Seaboat quality (Average = 1.00): 1.10

Hull form characteristics:
Hull has a flush deck
Block coefficient: 0.500
Length to Beam Ratio: 10.00 : 1
'Natural speed' for length: 26.25 kts
Power going to wave formation at top speed: 52 %
Trim (Max stability = 0, Max steadiness = 100): 50
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: 28.87 ft / 8.80 m
- Forecastle (20 %): 18.37 ft / 5.60 m
- Mid (50 %): 18.37 ft / 5.60 m
- Quarterdeck (15 %): 18.37 ft / 5.60 m
- Stern: 18.37 ft / 5.60 m
- Average freeboard: 19.21 ft / 5.86 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 93.2 %
- Above water (accommodation/working, high = better): 138.5 %
Waterplane Area: 31,627 Square feet or 2,938 Square metres
Displacement factor (Displacement / loading): 140 %
Structure weight / hull surface area: 150 lbs/sq ft or 730 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.37
- Longitudinal: 1.35
- Overall: 1.36
Hull space for machinery, storage, compartmentation is adequate
Room for accommodation and workspaces is excellent

3

Saturday, August 29th 2015, 7:44pm

And the last one.

Aurora Alpha Flight, Peruvian Fleet Aircraft Carrier laid down 1950

Displacement:
53,424 t light; 54,600 t standard; 58,786 t normal; 62,135 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(1,049.87 ft / 1,049.87 ft) x 114.83 ft x (29.53 / 30.88 ft)
(320.00 m / 320.00 m) x 35.00 m x (9.00 / 9.41 m)
16 - 4.72" / 120 mm 45.0 cal guns - 0.00lbs / 0.00kg shells, 150 per gun
Dual purpose guns in turret on barbette mounts, 1950 Model
8 x 2-gun mounts on side ends, evenly spread
12 - 2.95" / 75.0 mm 45.0 cal guns - 0.00lbs / 0.00kg shells, 200 per gun
Auto rapid fire guns in deck and hoist mounts, 1950 Model
6 x Twin mounts on sides, evenly spread
24 - 1.57" / 40.0 mm 45.0 cal guns - 0.00lbs / 0.00kg shells, 450 per gun
Anti-air guns in deck mounts, 1950 Model
6 x Quad mounts on sides, evenly spread
Weight of broadside 0 lbs / 0 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.72" / 120 mm 650.43 ft / 198.25 m 12.86 ft / 3.92 m
Ends: Unarmoured
Main Belt covers 95 % of normal length

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 2.95" / 75 mm - 2.95" / 75 mm
2nd: 0.98" / 25 mm - -
3rd: 0.98" / 25 mm - -

- Armoured deck - multiple decks:
For and Aft decks: 3.54" / 90 mm
Forecastle: 3.54" / 90 mm Quarter deck: 3.54" / 90 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 216,957 shp / 161,850 Kw = 32.00 kts
Range 20,000nm at 12.00 kts
Bunker at max displacement = 7,535 tons

Complement:
1,886 - 2,453

Cost:
£22.660 million / $90.641 million

Distribution of weights at normal displacement:
Armament: 0 tons, 0.0 %
Armour: 7,450 tons, 12.7 %
- Belts: 1,659 tons, 2.8 %
- Armament: 84 tons, 0.1 %
- Armour Deck: 5,708 tons, 9.7 %
Machinery: 5,190 tons, 8.8 %
Hull, fittings & equipment: 24,284 tons, 41.3 %
Fuel, ammunition & stores: 5,362 tons, 9.1 %
Miscellaneous weights: 16,500 tons, 28.1 %
- Hull below water: 10,000 tons
- Hull above water: 6,000 tons
- On freeboard deck: 500 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
0 lbs / 0 Kg = NeuN x 4.7 " / 120 mm shells or 3.6 torpedoes
Stability (Unstable if below 1.00): 1.45
Metacentric height 11.6 ft / 3.5 m
Roll period: 14.1 seconds
Steadiness - As gun platform (Average = 50 %): 73 %
- Recoil effect (Restricted arc if above 1.00): 0.00
Seaboat quality (Average = 1.00): 1.46

Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0.578 / 0.584
Length to Beam Ratio: 9.14 : 1
'Natural speed' for length: 32.40 kts
Power going to wave formation at top speed: 44 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 0.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 26.25 ft / 8.00 m, 26.25 ft / 8.00 m
- Forward deck: 30.00 %, 26.25 ft / 8.00 m, 26.25 ft / 8.00 m
- Aft deck: 35.00 %, 26.25 ft / 8.00 m, 26.25 ft / 8.00 m
- Quarter deck: 15.00 %, 26.25 ft / 8.00 m, 26.25 ft / 8.00 m
- Average freeboard: 26.25 ft / 8.00 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 59.3 %
- Above water (accommodation/working, high = better): 229.0 %
Waterplane Area: 86,374 Square feet or 8,024 Square metres
Displacement factor (Displacement / loading): 171 %
Structure weight / hull surface area: 206 lbs/sq ft or 1,007 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.49
- Longitudinal: 0.99
- Overall: 1.10
Excellent machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Good seaboat, rides out heavy weather easily

Miscellaneous Weight Distribution:
125 Aircraft (16000 Tons)
Command and Operatioln Facilities (300 Tons)
Electronic Suite (200 Tons)

4

Saturday, August 29th 2015, 8:01pm

Very good for your first time. Just a few things:

1) The battleship needs half of the Main Battery superfiring, much of the Light AA Battery also need to be raised.
2) Seakeeping on the battleship is poor, might want to try and fix that.
3) Personally I would give the battleship some miscellaneous weight

You managed to get a TDS on the light cruiser but kept full belt protection, that isn't easy!

5

Saturday, August 29th 2015, 8:45pm

Very good for your first time. Just a few things:

1) The battleship needs half of the Main Battery superfiring, much of the Light AA Battery also need to be raised.
2) Seakeeping on the battleship is poor, might want to try and fix that.
3) Personally I would give the battleship some miscellaneous weight

You managed to get a TDS on the light cruiser but kept full belt protection, that isn't easy!
Ok thanks, also what is TDS?

6

Saturday, August 29th 2015, 10:10pm

Torpedo Defense System, aka the Torpedo bulkhead.

You also have quite a bit of excess hull strength, an indicator that your ships are either too large for the intended fit, or underarmed for your intended tonnage.

7

Sunday, August 30th 2015, 1:53am

I agree with the points brought up by the others. I would add a few more secondary turrets on the Battlecruiser. Two twins on each side isn't much. I would probably increase speed and armor a bit with the hullstrength left after raising two main gun turrets and trying to keep seakeeping above 1.

I think I might have mentioned it quite a while ago here, but IIRC in my book on the Scharnhorst class it was mentioned that the TBH had to be angled in order to be effective due to the narrow beam. Regardless of what SS says, I don't think that in reality the TBH would work on the 21m beam of that cruiser so it would be better to discard it. Looking around a bit, I mentioned it here and quoted the bit from the book...

http://wesworld.jk-clan.de/index.php?pag…D=4531#post4531

It is interesting that you used SS2 for the first two and then switched to SS3 with the carrier. Looking at the placement of the miscellaneous weights that tells me you probably did that because of stability issues in SS2 with all that weight. One problem with it is that none of the guns have a shell weight. Another thing I am seeing is that the Cross-sectional hull strength is higher than the Longitudinal. With almost all of my sims, it is the other way around or they are roughly equal to each other. You could raise the freeboard somewhat to gain some more hull strength which you could use on armor or speed or fuel or miscellaneous weights...

8

Sunday, August 30th 2015, 3:50am

I agree with the points brought up by the others. I would add a few more secondary turrets on the Battlecruiser. Two twins on each side isn't much. I would probably increase speed and armor a bit with the hullstrength left after raising two main gun turrets and trying to keep seakeeping above 1.

Thanks for the help.

Quoted

I think I might have mentioned it quite a while ago here, but IIRC in my book on the Scharnhorst class it was mentioned that the TBH had to be angled in order to be effective due to the narrow beam. Regardless of what SS says, I don't think that in reality the TBH would work on the 21m beam of that cruiser so it would be better to discard it. Looking around a bit, I mentioned it here and quoted the bit from the book...

http://wesworld.jk-clan.de/index.php?pag…D=4531#post4531

Interesting! Thanks!


Quoted

It is interesting that you used SS2 for the first two and then switched to SS3 with the carrier.


Did it because the SS3 gave more options and felt more sure after using SS2 for a bit.

Quoted

Looking at the placement of the miscellaneous weights that tells me you probably did that because of stability issues in SS2 with all that weight. One problem with it is that none of the guns have a shell weight.

... *facepalm*

How I didn't noticed that I will never know, thanks for the heads-up.

Quoted

Another thing I am seeing is that the Cross-sectional hull strength is higher than the Longitudinal. With almost all of my sims, it is the other way around or they are roughly equal to each other. You could raise the freeboard somewhat to gain some more hull strength which you could use on armor or speed or fuel or miscellaneous weights...


Thanks.