SDN World 3 Ship Design Thread

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Fingolfin_Noldor
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Re: SDN World 3 Ship Design Thread

Post by Fingolfin_Noldor »

CmdrWilkens wrote:
Fingolfin_Noldor wrote:It took quite a bit of effort, shedding here and there, while keeping with an average belt height of 18 ft, to arrive at a ship that burns at 28kt, while having a long cruise range at 10,000nm and at 14kts.

So...
Justinian, Byzantine Empire Battleship laid down 1926
Main Torpedoes
1 - 21.0" / 533 mm, 20.00 ft / 6.10 m torpedo - 1.327 t total
submerged side tube
You only have a single torpedo on the whole ship? No reloads?

Anyway as a comparative design the main battery and weight is basically the same as my Majestuoso class that in under construction right now (55,027 versus 55,030) but you get the extra belt and deck (as well as 2kts on the cruise speed) while mine has 2kts more top end.
Well, I have my doubts that torpedoes are useful in a fight, but I might be wrong.

I decided not to compromise too much on armor protection, and I wanted a reasonable cruise speed. Don't want my ships to spend an eternity crossing the Indian Ocean. My belt is reasonably high, and angled, with a good distance between the bulkheads to soak in the torpedoes.
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Re: SDN World 3 Ship Design Thread

Post by Ryan Thunder »

Wait--you actually did that on purpose? :P
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Re: SDN World 3 Ship Design Thread

Post by Fingolfin_Noldor »

Ryan Thunder wrote:Wait--you actually did that on purpose? :P
Just toying around with the torpedo resistance estimate, though I knew the thing was bloody inaccurate...
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Re: SDN World 3 Ship Design Thread

Post by Lascaris »

And too big for the economy monster version 2. With slight touch ups here and there

Plan 1925, Cisplatina Enter ship type laid down 1925 (Engine 1926)

Displacement:
52.130 t light; 55.003 t standard; 58.267 t normal; 60.878 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(797,04 ft / 780,00 ft) x 112,00 ft x (40,00 / 41,39 ft)
(242,94 m / 237,74 m) x 34,14 m x (12,19 / 12,62 m)

Armament:
12 - 17,72" / 450 mm 47,0 cal guns - 2.900,01lbs / 1.315,42kg shells, 82 per gun
Breech loading guns in turret on barbette mounts, 1925 Model
3 x 4-gun mounts on centreline ends, majority forward
1 raised mount - superfiring
20 - 5,00" / 127 mm 40,0 cal guns - 59,90lbs / 27,17kg shells, 150 per gun
Dual purpose guns in deck and hoist mounts, 1925 Model
10 x Single mounts on sides, evenly spread
32 - 1,57" / 40,0 mm 60,0 cal guns - 2,14lbs / 0,97kg shells, 600 per gun
Anti-air guns in deck mounts, 1925 Model
8 x Quad mounts on sides, evenly spread
Weight of broadside 36.066 lbs / 16.359 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 15,0" / 381 mm 465,70 ft / 141,95 m 17,20 ft / 5,24 m
Ends: Unarmoured
Main Belt covers 92% of normal length
Main Belt inclined 21,00 degrees (positive = in)

- Torpedo Bulkhead - Additional damage containing bulkheads:
4,00" / 102 mm 465,70 ft / 141,95 m 37,42 ft / 11,41 m
Beam between torpedo bulkheads 92,00 ft / 28,04 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 18,0" / 457 mm 9,00" / 229 mm 15,0" / 381 mm
2nd: 3,00" / 76 mm - -
3rd: 0,50" / 13 mm - -

- Armoured deck - multiple decks:
For and Aft decks: 8,00" / 203 mm

- Conning towers: Forward 5,00" / 127 mm, Aft 2,00" / 51 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 123.908 shp / 92.435 Kw = 28,00 kts
Range 7.400nm at 15,00 kts
Bunker at max displacement = 5.875 tons

Complement:
1.874 - 2.437

Cost:
£19,193 million / $76,771 million

Distribution of weights at normal displacement:
Armament: 7.181 tons, 12,3%
- Guns: 7.181 tons, 12,3%
Armour: 20.836 tons, 35,8%
- Belts: 5.298 tons, 9,1%
- Torpedo bulkhead: 2.579 tons, 4,4%
- Armament: 4.781 tons, 8,2%
- Armour Deck: 7.951 tons, 13,6%
- Conning Towers: 227 tons, 0,4%
Machinery: 3.966 tons, 6,8%
Hull, fittings & equipment: 20.147 tons, 34,6%
Fuel, ammunition & stores: 6.137 tons, 10,5%
Miscellaneous weights: 0 tons, 0,0%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
64.925 lbs / 29.449 Kg = 23,4 x 17,7 " / 450 mm shells or 10,5 torpedoes
Stability (Unstable if below 1.00): 1,06
Metacentric height 6,6 ft / 2,0 m
Roll period: 18,3 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0,92
Seaboat quality (Average = 1.00): 1,01

Hull form characteristics:
Hull has a flush deck,
a normal bow and large transom stern
Block coefficient (normal/deep): 0,584 / 0,589
Length to Beam Ratio: 6,96 : 1
'Natural speed' for length: 32,52 kts
Power going to wave formation at top speed: 51 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 30,00 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%, 29,52 ft / 9,00 m, 24,15 ft / 7,36 m
- Forward deck: 30,00%, 24,15 ft / 7,36 m, 18,78 ft / 5,72 m
- Aft deck: 35,00%, 18,78 ft / 5,72 m, 18,78 ft / 5,72 m
- Quarter deck: 15,00%, 18,78 ft / 5,72 m, 18,78 ft / 5,72 m
- Average freeboard: 21,09 ft / 6,43 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 91,8%
- Above water (accommodation/working, high = better): 133,4%
Waterplane Area: 65.554 Square feet or 6.090 Square metres
Displacement factor (Displacement / loading): 94%
Structure weight / hull surface area: 256 lbs/sq ft or 1.252 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,95
- Longitudinal: 1,52
- Overall: 1,00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room
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Re: SDN World 3 Ship Design Thread

Post by Lascaris »

In Battlecruiser version

Plan 1925, Cisplatina Enter ship type laid down 1925 (Engine 1926)

Displacement:
52.698 t light; 55.042 t standard; 58.267 t normal; 60.846 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(880,65 ft / 862,00 ft) x 112,00 ft x (40,00 / 41,31 ft)
(268,42 m / 262,74 m) x 34,14 m x (12,19 / 12,59 m)

Armament:
8 - 17,72" / 450 mm 47,0 cal guns - 2.900,01lbs / 1.315,42kg shells, 82 per gun
Breech loading guns in turret on barbette mounts, 1925 Model
2 x 4-gun mounts on centreline ends, evenly spread
20 - 5,00" / 127 mm 40,0 cal guns - 59,90lbs / 27,17kg shells, 150 per gun
Dual purpose guns in deck and hoist mounts, 1925 Model
10 x Single mounts on sides, evenly spread
32 - 1,57" / 40,0 mm 60,0 cal guns - 2,14lbs / 0,97kg shells, 600 per gun
Anti-air guns in deck mounts, 1925 Model
8 x Quad mounts on sides, evenly spread
Weight of broadside 24.466 lbs / 11.098 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 16,0" / 406 mm 516,00 ft / 157,28 m 18,00 ft / 5,49 m
Ends: Unarmoured
Main Belt covers 92% of normal length
Main Belt inclined 21,00 degrees (positive = in)

- Torpedo Bulkhead - Additional damage containing bulkheads:
4,00" / 102 mm 516,00 ft / 157,28 m 36,13 ft / 11,01 m
Beam between torpedo bulkheads 92,00 ft / 28,04 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 18,0" / 457 mm 9,00" / 229 mm 16,0" / 406 mm
2nd: 3,00" / 76 mm - -
3rd: 0,50" / 13 mm - -

- Armoured deck - multiple decks:
For and Aft decks: 8,00" / 203 mm
Forecastle: 2,00" / 51 mm Quarter deck: 2,00" / 51 mm

- Conning towers: Forward 5,00" / 127 mm, Aft 2,00" / 51 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 219.832 shp / 163.994 Kw = 33,00 kts
Range 7.400nm at 15,00 kts
Bunker at max displacement = 5.804 tons

Complement:
1.874 - 2.437

Cost:
£16,980 million / $67,920 million

Distribution of weights at normal displacement:
Armament: 4.896 tons, 8,4%
- Guns: 4.896 tons, 8,4%
Armour: 21.402 tons, 36,7%
- Belts: 6.416 tons, 11,0%
- Torpedo bulkhead: 2.759 tons, 4,7%
- Armament: 3.182 tons, 5,5%
- Armour Deck: 8.818 tons, 15,1%
- Conning Towers: 227 tons, 0,4%
Machinery: 7.037 tons, 12,1%
Hull, fittings & equipment: 19.364 tons, 33,2%
Fuel, ammunition & stores: 5.569 tons, 9,6%
Miscellaneous weights: 0 tons, 0,0%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
73.150 lbs / 33.180 Kg = 26,3 x 17,7 " / 450 mm shells or 11,4 torpedoes
Stability (Unstable if below 1.00): 1,20
Metacentric height 8,3 ft / 2,5 m
Roll period: 16,4 seconds
Steadiness - As gun platform (Average = 50 %): 51 %
- Recoil effect (Restricted arc if above 1.00): 0,52
Seaboat quality (Average = 1.00): 1,01

Hull form characteristics:
Hull has a flush deck,
a normal bow and large transom stern
Block coefficient (normal/deep): 0,528 / 0,534
Length to Beam Ratio: 7,70 : 1
'Natural speed' for length: 34,12 kts
Power going to wave formation at top speed: 54 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 30,00 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%, 32,30 ft / 9,85 m, 26,42 ft / 8,05 m
- Forward deck: 30,00%, 26,42 ft / 8,05 m, 20,55 ft / 6,26 m
- Aft deck: 35,00%, 20,55 ft / 6,26 m, 20,55 ft / 6,26 m
- Quarter deck: 15,00%, 20,55 ft / 6,26 m, 20,55 ft / 6,26 m
- Average freeboard: 23,07 ft / 7,03 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 92,1%
- Above water (accommodation/working, high = better): 152,9%
Waterplane Area: 68.690 Square feet or 6.382 Square metres
Displacement factor (Displacement / loading): 101%
Structure weight / hull surface area: 220 lbs/sq ft or 1.076 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,96
- Longitudinal: 1,41
- Overall: 1,00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room
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Re: SDN World 3 Ship Design Thread

Post by Lascaris »

26knot variant

Plan 1925, Cisplatina Enter ship type laid down 1925 (Engine 1926)

Displacement:
52.130 t light; 55.003 t standard; 58.267 t normal; 60.878 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(797,04 ft / 780,00 ft) x 112,00 ft x (40,00 / 41,39 ft)
(242,94 m / 237,74 m) x 34,14 m x (12,19 / 12,62 m)

Armament:
12 - 17,72" / 450 mm 47,0 cal guns - 2.900,01lbs / 1.315,42kg shells, 82 per gun
Breech loading guns in turret on barbette mounts, 1925 Model
3 x 4-gun mounts on centreline ends, majority forward
1 raised mount - superfiring
20 - 5,00" / 127 mm 40,0 cal guns - 59,90lbs / 27,17kg shells, 150 per gun
Dual purpose guns in deck and hoist mounts, 1925 Model
10 x Single mounts on sides, evenly spread
32 - 1,57" / 40,0 mm 60,0 cal guns - 2,14lbs / 0,97kg shells, 600 per gun
Anti-air guns in deck mounts, 1925 Model
8 x Quad mounts on sides, evenly spread
Weight of broadside 36.066 lbs / 16.359 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 16,0" / 406 mm 433,50 ft / 132,13 m 18,00 ft / 5,49 m
Ends: Unarmoured
Main Belt covers 86% of normal length
Main Belt inclined 21,00 degrees (positive = in)

- Torpedo Bulkhead - Additional damage containing bulkheads:
4,00" / 102 mm 433,50 ft / 132,13 m 37,42 ft / 11,41 m
Beam between torpedo bulkheads 92,00 ft / 28,04 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 21,0" / 533 mm 10,0" / 254 mm 16,0" / 406 mm
2nd: 3,00" / 76 mm - -
3rd: 0,50" / 13 mm - -

- Armoured deck - multiple decks:
For and Aft decks: 8,00" / 203 mm
Forecastle: 1,00" / 25 mm Quarter deck: 1,00" / 25 mm

- Conning towers: Forward 5,00" / 127 mm, Aft 2,00" / 51 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 94.017 shp / 70.137 Kw = 26,00 kts
Range 7.400nm at 15,00 kts
Bunker at max displacement = 5.875 tons

Complement:
1.874 - 2.437

Cost:
£18,754 million / $75,017 million

Distribution of weights at normal displacement:
Armament: 7.181 tons, 12,3%
- Guns: 7.181 tons, 12,3%
Armour: 21.586 tons, 37,0%
- Belts: 5.594 tons, 9,6%
- Torpedo bulkhead: 2.401 tons, 4,1%
- Armament: 5.185 tons, 8,9%
- Armour Deck: 8.180 tons, 14,0%
- Conning Towers: 227 tons, 0,4%
Machinery: 3.010 tons, 5,2%
Hull, fittings & equipment: 20.353 tons, 34,9%
Fuel, ammunition & stores: 6.137 tons, 10,5%
Miscellaneous weights: 0 tons, 0,0%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
69.528 lbs / 31.538 Kg = 25,0 x 17,7 " / 450 mm shells or 11,6 torpedoes
Stability (Unstable if below 1.00): 1,04
Metacentric height 6,4 ft / 1,9 m
Roll period: 18,6 seconds
Steadiness - As gun platform (Average = 50 %): 59 %
- Recoil effect (Restricted arc if above 1.00): 0,99
Seaboat quality (Average = 1.00): 1,18

Hull form characteristics:
Hull has a flush deck,
a normal bow and large transom stern
Block coefficient (normal/deep): 0,584 / 0,589
Length to Beam Ratio: 6,96 : 1
'Natural speed' for length: 32,52 kts
Power going to wave formation at top speed: 47 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 30,00 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%, 29,52 ft / 9,00 m, 24,15 ft / 7,36 m
- Forward deck: 30,00%, 24,15 ft / 7,36 m, 18,78 ft / 5,72 m
- Aft deck: 35,00%, 18,78 ft / 5,72 m, 18,78 ft / 5,72 m
- Quarter deck: 15,00%, 18,78 ft / 5,72 m, 18,78 ft / 5,72 m
- Average freeboard: 21,09 ft / 6,43 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 85,5%
- Above water (accommodation/working, high = better): 133,4%
Waterplane Area: 65.554 Square feet or 6.090 Square metres
Displacement factor (Displacement / loading): 96%
Structure weight / hull surface area: 259 lbs/sq ft or 1.263 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,96
- Longitudinal: 1,54
- Overall: 1,00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room
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Raesene
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Re: SDN World 3 Ship Design Thread

Post by Raesene »

Lascaris, you have your 20 secondary guns in 10 single mounts :-)
You main belt is also angled into the ship, which is (from my understanding of "positive = in") the wrong direction.

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Re: SDN World 3 Ship Design Thread

Post by Ma Deuce »

You main belt is also angled into the ship, which is (from my understanding of "positive = in") the wrong direction.
Your understanding would appear to be incorrect: The positive angle = narrower toward bottom is almost universially accepted in my experience: BigGun uses that standard, as does the obliquity calculator for Nathan Okun's facehard programs, as described below in the program's definitions.
oblicalc.exe wrote:INCLINATION ANGLE OF PLATE IS AT RIGHT ANGLES TO DECK PLANE, IS ZERO FOR A PLATE STANDING VERTICALLY, AND IS POSITIVE WHEN PLATE TOP OVERHANGS BOTTOM SO THAT PLATE FACES DOWNWARD (Id)
So yeah, although admittedly I have not found out conclusively which standard Springsharp uses, in light of the above I'd be most surprised indeed if it went against the grain in using the opposite that almost everyone else does.
Last edited by Ma Deuce on 2010-01-02 02:45pm, edited 1 time in total.
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Re: SDN World 3 Ship Design Thread

Post by CmdrWilkens »

Raesene wrote:Lascaris, you have your 20 secondary guns in 10 single mounts :-)
You main belt is also angled into the ship, which is (from my understanding of "positive = in") the wrong direction.
I think we've all been using positive angle numbers.

Back to the ship itself
Lascaris wrote: - Armoured deck - multiple decks:
For and Aft decks: 8,00" / 203 mm
Forecastle: 1,00" / 25 mm Quarter deck: 1,00" / 25 mm

- Conning towers: Forward 5,00" / 127 mm, Aft 2,00" / 51 mm

Both of those choices are probably asking for trouble. By going with "multiple decks" your actual resistance to plunging shellfire is reduced as separate decks offer less resistance than a single heavily armored deck. Also you conning tower is just begging to be blown away as even secondaries would be sufficient to penetrate and set it afire causing a severe reduction in your ability to handle the ship. Virtually everyone designing late 20s BB and BC ships right now is going with 14" + of armor (at least on the "Forward" portion) on the conning tower.
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Re: SDN World 3 Ship Design Thread

Post by Raesene »

Ma Deuce wrote:
You main belt is also angled into the ship, which is (from my understanding of "positive = in") the wrong direction.
Your understanding would appear to be incorrect: The positive angle = narrower toward bottom is almost universially accepted in my experience: BigGun uses that standard, as does the obliquity calculator for Nathan Okun's facehard programs, as described below in the program's definitions.
oblicalc.exe wrote:INCLINATION ANGLE OF PLATE IS AT RIGHT ANGLES TO DECK PLANE, IS ZERO FOR A PLATE STANDING VERTICALLY, AND IS POSITIVE WHEN PLATE TOP OVERHANGS BOTTOM SO THAT PLATE FACES DOWNWARD (Id)
So yeah, although admittedly I have not found out conclusively which standard Springsharp uses, in light of the above I'd be most surprised indeed if it went against the grain in using the opposite that almost everyone else does.
I stand corrected, then.

"In view of the circumstances, Britannia waives the rules."

"All you have to do is to look at Northern Ireland, [...] to see how seriously the religious folks take "thou shall not kill. The more devout they are, the more they see murder as being negotiable." George Carlin

"We need to make gay people live in fear again! What ever happened to the traditional family values of persecution and lies?" - Darth Wong
"The closet got full and some homosexuals may have escaped onto the internet?"- Stormbringer

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Re: SDN World 3 Ship Design Thread

Post by Ryan Thunder »

This existed with bigger guns and was never sunk in a storm, therefore mine works. And its what I wanted the Valiente to be in the beginning before I got any funny ideas from Raesene, anyway.
SpringSharp v3.3 wrote:Valiente, Gran Colombia monitor laid down 1920

Displacement:
6 569 t light; 7 115 t standard; 8 000 t normal; 8 708 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(410.11 ft / 410.11 ft) x 91.86 ft (Bulges 98.43 ft) x (11.98 / 12.89 ft)
(125.00 m / 125.00 m) x 28.00 m (Bulges 30.00 m) x (3.65 / 3.93 m)

Armament:
2 - 14.96" / 380 mm 45.0 cal guns - 1 708.58lbs / 775.00kg shells, 150 per gun
Breech loading guns in turret on barbette mount, 1920 Model
1 x 2-gun mount on centreline, forward deck aft
8 - 5.91" / 150 mm 50.0 cal guns - 110.23lbs / 50.00kg shells, 200 per gun
Quick firing guns in turret on barbette mounts, 1920 Model
6 x Single mounts on side ends, majority forward
2 x Single mounts on centreline ends, evenly spread
2 - 3.15" / 80.0 mm 60.0 cal guns - 13.23lbs / 6.00kg shells, 200 per gun
Anti-air guns in deck mounts, 1920 Model
2 x Single mounts on sides, aft deck forward
8 - 0.57" / 14.5 mm 80.0 cal guns - 0.11lbs / 0.05kg shells, 2 000 per gun
Machine guns in deck mounts, 1918 Model
2 x 2 row quad mounts on sides, forward deck aft
Weight of broadside 4 326 lbs / 1 962 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 4.00" / 102 mm 255.91 ft / 78.00 m 13.12 ft / 4.00 m
Ends: Unarmoured
Main Belt covers 96 % of normal length
Main Belt inclined -20.00 degrees (positive = in)

- Torpedo Bulkhead - Additional damage containing bulkheads:
1.97" / 50 mm 255.91 ft / 78.00 m 13.12 ft / 4.00 m
Beam between torpedo bulkheads 72.18 ft / 22.00 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 13.0" / 330 mm - 7.87" / 200 mm
2nd: 1.18" / 30 mm 1.18" / 30 mm 1.18" / 30 mm

- Armoured deck - single deck:
For and Aft decks: 3.94" / 100 mm

- Conning towers: Forward 7.87" / 200 mm, Aft 3.94" / 100 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 2 shafts, 16 363 shp / 12 206 Kw = 20.00 kts
Range 6 000nm at 15.00 kts
Bunker at max displacement = 1 592 tons

Complement:
422 - 549

Cost:
£1.700 million / $6.798 million

Distribution of weights at normal displacement:
Armament: 972 tons, 12.1 %
- Guns: 972 tons, 12.1 %
Armour: 3 002 tons, 37.5 %
- Belts: 632 tons, 7.9 %
- Torpedo bulkhead: 245 tons, 3.1 %
- Armament: 408 tons, 5.1 %
- Armour Deck: 1 615 tons, 20.2 %
- Conning Towers: 102 tons, 1.3 %
Machinery: 572 tons, 7.2 %
Hull, fittings & equipment: 2 023 tons, 25.3 %
Fuel, ammunition & stores: 1 431 tons, 17.9 %
Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
10 261 lbs / 4 654 Kg = 6.1 x 15.0 " / 380 mm shells or 3.7 torpedoes
Stability (Unstable if below 1.00): 1.98
Metacentric height 13.0 ft / 4.0 m
Roll period: 11.5 seconds
Steadiness - As gun platform (Average = 50 %): 60 %
- Recoil effect (Restricted arc if above 1.00): 0.12
Seaboat quality (Average = 1.00): 1.29

Hull form characteristics:
Hull has a flush deck,
a straight bulbous bow and a cruiser stern
Block coefficient (normal/deep): 0.579 / 0.586
Length to Beam Ratio: 4.17 : 1
'Natural speed' for length: 20.25 kts
Power going to wave formation at top speed: 49 %
Trim (Max stability = 0, Max steadiness = 100): 47
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, 19.69 ft / 6.00 m
- Forward deck: 30.00 %, 19.69 ft / 6.00 m, 14.76 ft / 4.50 m
- Aft deck: 35.00 %, 14.76 ft / 4.50 m, 14.76 ft / 4.50 m
- Quarter deck: 15.00 %, 14.76 ft / 4.50 m, 14.76 ft / 4.50 m
- Average freeboard: 17.01 ft / 5.19 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 91.0 %
- Above water (accommodation/working, high = better): 193.9 %
Waterplane Area: 27 024 Square feet or 2 511 Square metres
Displacement factor (Displacement / loading): 99 %
Structure weight / hull surface area: 77 lbs/sq ft or 377 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.47
- Longitudinal: 1.15
- Overall: 0.51
Caution: Hull subject to strain in open-sea
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room
Good seaboat, rides out heavy weather easily
EDIT: That would be because I somehow put 630 mm armour on my 15 cm guns...
Last edited by Ryan Thunder on 2010-01-02 06:30pm, edited 1 time in total.
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Re: SDN World 3 Ship Design Thread

Post by Lascaris »

CmdrWilkens wrote:
Raesene wrote:Lascaris, you have your 20 secondary guns in 10 single mounts :-)
You main belt is also angled into the ship, which is (from my understanding of "positive = in") the wrong direction.
I think we've all been using positive angle numbers.

Back to the ship itself
Lascaris wrote: - Armoured deck - multiple decks:
For and Aft decks: 8,00" / 203 mm
Forecastle: 1,00" / 25 mm Quarter deck: 1,00" / 25 mm

- Conning towers: Forward 5,00" / 127 mm, Aft 2,00" / 51 mm

Both of those choices are probably asking for trouble. By going with "multiple decks" your actual resistance to plunging shellfire is reduced as separate decks offer less resistance than a single heavily armored deck. Also you conning tower is just begging to be blown away as even secondaries would be sufficient to penetrate and set it afire causing a severe reduction in your ability to handle the ship. Virtually everyone designing late 20s BB and BC ships right now is going with 14" + of armor (at least on the "Forward" portion) on the conning tower.

For the first springsharp fails to differentiate at the slightest. So I just did not bother to change the setting in the program to single deck. It's not a choice in other words just not bothering with a not yet working feature. For the second yes and no. Most navies went for a heavily armored conning tower. On the other hand one can point to British practice as shown in King George V, Vanguard and the design for the Lions where the forward conning tower had armor varying from 3 (Vaguard) to 4.5 inches.
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Re: SDN World 3 Ship Design Thread

Post by Lascaris »

Raesene wrote:Lascaris, you have your 20 secondary guns in 10 single mounts :-)
You main belt is also angled into the ship, which is (from my understanding of "positive = in") the wrong direction.

When cleaning up the ship I will make it up twin mounts and a single deck for the armor no fear. In the meantime as they were not quite affecting composite strength forgot the first and did not bother with the second. But thanks since I;d have forgotten it at all. :)
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Re: SDN World 3 Ship Design Thread

Post by Beowulf »

Ryan Thunder wrote:This existed with bigger guns, therefore mine works. And its what I wanted the Valiente to be in the beginning before I got any funny ideas from Raesene, anyway.
SpringSharp v3.3 wrote:Valiente, Gran Colombia monitor laid down 1920
DESIGN FAILURE: Overall load weight too much for hull


Try increasing the displacement to 8000 tons standard. You can probably skip the aft conning tower. Also try making it a bit skinnier. You also don't need nearly as much freeboard, especially given that it's primarily to operate in the Caribbean.
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Re: SDN World 3 Ship Design Thread

Post by Ryan Thunder »

Beowulf wrote:
Ryan Thunder wrote:This existed with bigger guns, therefore mine works. And its what I wanted the Valiente to be in the beginning before I got any funny ideas from Raesene, anyway.
SpringSharp v3.3 wrote:Valiente, Gran Colombia monitor laid down 1920
DESIGN FAILURE: Overall load weight too much for hull


Try increasing the displacement to 8000 tons standard. You can probably skip the aft conning tower. Also try making it a bit skinnier. You also don't need nearly as much freeboard, especially given that it's primarily to operate in the Caribbean.

I edited it because I noticed that the armour on the secondary guns was 630 mm thick. :P

Mind having another look at it for me? :)
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Re: SDN World 3 Ship Design Thread

Post by Beowulf »

Ryan Thunder wrote:
Beowulf wrote:Try increasing the displacement to 8000 tons standard. You can probably skip the aft conning tower. Also try making it a bit skinnier. You also don't need nearly as much freeboard, especially given that it's primarily to operate in the Caribbean.
I edited it because I noticed that the armour on the secondary guns was 630 mm thick. :P

Mind having another look at it for me? :)
I'm sure it'll be a great design for land bombardment.
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Re: SDN World 3 Ship Design Thread

Post by Thanas »

Lascaris, I'd advise you to have at least 12" in the turret side armor, but of course it is your choice.
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Re: SDN World 3 Ship Design Thread

Post by Norseman »

Thanas wrote:Lascaris, I'd advise you to have at least 12" in the turret side armor, but of course it is your choice.
I think Other Gunhouse is an average of sides and top armour, with the top presumably being somewhat thinner than the sides. At least that's how I see things with my designs, of which only the latest have 12" in turret armour.
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Re: SDN World 3 Ship Design Thread

Post by Raesene »

Ryan Thunder wrote:This existed with bigger guns and was never sunk in a storm, therefore mine works. And its what I wanted the Valiente to be in the beginning before I got any funny ideas from Raesene, anyway.
Did you check what this ship type was used for ? Naval gunfire support during invasions, it would have been battleship or even cruiser fodder just like your other monitors. 4'' armour will not protect you against heavy guns, and with just two heavy guns of your own your chance to hit a maneuvering target are close to zero.
Last edited by Raesene on 2010-01-03 08:47am, edited 1 time in total.

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Re: SDN World 3 Ship Design Thread

Post by Norseman »

My advice? I would recommend that you use a Brazilian export design such as this one:

Code: Select all

BNS Colombia, FSR of Brazil Battleship laid down 1925

Displacement:
	36,798 t light; 39,249 t standard; 41,561 t normal; 43,410 t full load

Dimensions: Length overall / water x beam x draught
	747.21 ft / 732.00 ft x 108.00 ft x 32.00 ft (normal load)
	227.75 m / 223.11 m x 32.92 m  x 9.75 m

Armament:
      12 - 16.50" / 419 mm guns (4x3 guns), 2,246.06lbs / 1,018.80kg shells, 1925 Model
	  Breech loading guns in turrets (on barbettes)
	  on centreline ends, evenly spread
      16 - 6.00" / 152 mm guns (8x2 guns), 108.00lbs / 48.99kg shells, 1925 Model
	  Breech loading guns in deck mounts with hoists
	  on side, all amidships
      8 - 3.00" / 76.2 mm guns in single mounts, 13.50lbs / 6.12kg shells, 1925 Model
	  Anti-aircraft guns in deck mounts with hoists
	  on side, evenly spread
      16 - 1.57" / 40.0 mm guns (8x2 guns), 1.95lbs / 0.89kg shells, 1925 Model
	  Anti-aircraft guns in deck mounts 
	  on side, evenly spread
      12 - 0.50" / 12.7 mm guns (8 mounts), 0.06lbs / 0.03kg shells, 1925 Model
	  Machine guns in deck mounts 
	  on side, evenly spread
	Weight of broadside 28,821 lbs / 13,073 kg
	Shells per gun, main battery: 100
	2 - 24.5" / 622.3 mm submerged torpedo tubes

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	13.5" / 343 mm	390.00 ft / 118.87 m	16.00 ft / 4.88 m
	Ends:	1.00" / 25 mm	342.00 ft / 104.24 m	16.00 ft / 4.88 m
	  Main Belt covers 82 % of normal length

   - Torpedo Bulkhead:
		3.00" / 76 mm	732.00 ft / 223.11 m	30.00 ft / 9.14 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	16.0" / 406 mm	12.0" / 305 mm		11.0" / 279 mm
	2nd:	1.50" / 38 mm	1.00" / 25 mm		1.00" / 25 mm
	3rd:	      -		      -			1.00" / 25 mm

   - Armour deck: 5.00" / 127 mm, Conning tower: 11.00" / 279 mm

Machinery:
	No fuel, Internal combustion motors, 
	No drive to shaft, 3 shafts, 70,626 shp / 52,687 Kw = 24.44 kts
	Range 7,000nm at 15.00 kts
	Bunker at max displacement = 4,161 tons

Complement:
	1,455 - 1,892

Cost:
	£14.119 million / $56.475 million

Distribution of weights at normal displacement:
	Armament: 3,603 tons, 8.7 %
	Armour: 15,820 tons, 38.1 %
	   - Belts: 4,029 tons, 9.7 %
	   - Torpedo bulkhead: 2,438 tons, 5.9 %
	   - Armament: 3,844 tons, 9.2 %
	   - Armour Deck: 5,225 tons, 12.6 %
	   - Conning Tower: 284 tons, 0.7 %
	Machinery: 0 tons, 0.0 %
	Hull, fittings & equipment: 17,175 tons, 41.3 %
	Fuel, ammunition & stores: 4,763 tons, 11.5 %
	Miscellaneous weights: 200 tons, 0.5 %

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  55,252 lbs / 25,062 Kg = 24.6 x 16.5 " / 419 mm shells or 10.8 torpedoes
	Stability (Unstable if below 1.00): 1.07
	Metacentric height 6.4 ft / 1.9 m
	Roll period: 18.0 seconds
	Steadiness	- As gun platform (Average = 50 %): 71 %
			- Recoil effect (Restricted arc if above 1.00): 0.83
	Seaboat quality  (Average = 1.00): 1.27

Hull form characteristics:
	Hull has raised forecastle
	Block coefficient: 0.575
	Length to Beam Ratio: 6.78 : 1
	'Natural speed' for length: 27.06 kts
	Power going to wave formation at top speed: 44 %
	Trim (Max stability = 0, Max steadiness = 100): 56
	Bow angle (Positive = bow angles forward): 20.00 degrees
	Stern overhang: 5.00 ft / 1.52 m
	Freeboard (% = measuring location as a percentage of overall length):
	   - Stem:		28.04 ft / 8.55 m
	   - Forecastle (18 %):	22.00 ft / 6.71 m (20.00 ft / 6.10 m aft of break)
	   - Mid (50 %):		17.85 ft / 5.44 m
	   - Quarterdeck (18 %):	17.85 ft / 5.44 m
	   - Stern:		17.85 ft / 5.44 m
	   - Average freeboard:	19.35 ft / 5.90 m
	Ship tends to be wet forward

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 81.8 %
		- Above water (accommodation/working, high = better): 136.0 %
	Waterplane Area: 56,482 Square feet or 5,247 Square metres
	Displacement factor (Displacement / loading): 93 %
	Structure weight / hull surface area: 226 lbs/sq ft or 1,104 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.97
		- Longitudinal: 1.32
		- 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
It's 40 000 tons so you can license build it using your own docks and for a little bit of extra money we can have them built using Brazilian docks too.
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Re: SDN World 3 Ship Design Thread

Post by Thanas »

Norseman wrote:My advice? I would recommend that you use a Brazilian export design such as this one:
.
I would caution Ryan against that design simply because it has no superfiring armament.

I would instead advise to license one of the prized German 40kt export ships, for example the latest iteration of my Österreich class:
Österreich, Germany Schlachtschiff laid down 1926

Displacement:
37.880 t light; 39.947 t standard; 41.402 t normal; 42.567 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(764,59 ft / 721,78 ft) x 118,11 ft x (36,09 / 36,83 ft)
(233,05 m / 220,00 m) x 36,00 m x (11,00 / 11,22 m)

Armament:
10 - 16,50" / 419 mm 45,0 cal guns - 2.265,21lbs / 1.027,48kg shells, 90 per gun
Breech loading guns in turret on barbette mounts, 1926 Model
2 x Quad mounts on centreline ends, evenly spread
1 x Twin mount on centreline, forward deck aft
1 raised mount
12 - 6,00" / 152 mm 39,0 cal guns - 102,99lbs / 46,72kg shells, 120 per gun
Quick firing guns in turret on barbette mounts, 1926 Model
6 x Twin mounts on sides, evenly spread
8 - 3,94" / 100,0 mm 39,0 cal guns - 29,10lbs / 13,20kg shells, 120 per gun
Dual purpose guns in deck and hoist mounts, 1926 Model
8 x Single mounts on sides, evenly spread
24 - 1,57" / 40,0 mm 38,0 cal guns - 1,85lbs / 0,84kg shells, 300 per gun
Anti-air guns in deck mounts, 1926 Model
12 x Twin mounts on sides, evenly spread
24 - 0,79" / 20,0 mm 20,0 cal guns - 0,22lbs / 0,10kg shells, 500 per gun
Breech loading guns in deck mounts, 1926 Model
6 x Quad mounts on sides, evenly spread
Weight of broadside 24.171 lbs / 10.964 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 16,0" / 406 mm 350,00 ft / 106,68 m 18,00 ft / 5,49 m
Ends: Unarmoured
Main Belt covers 75% of normal length

- Torpedo Bulkhead:
2,70" / 69 mm 350,00 ft / 106,68 m 25,00 ft / 7,62 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 18,0" / 457 mm 11,0" / 279 mm 12,0" / 305 mm
2nd: 2,00" / 51 mm 1,00" / 25 mm 1,00" / 25 mm
3rd: 1,00" / 25 mm - -
4th: 1,00" / 25 mm - -
5th: 1,00" / 25 mm - -

- Armoured deck - single deck: 7,00" / 178 mm For and Aft decks
Forecastle: 1,50" / 38 mm Quarter deck: 1,50" / 38 mm

- Conning towers: Forward 8,00" / 203 mm, Aft 0,00" / 0 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 46.421 shp / 34.630 Kw = 22,00 kts
Range 5.000nm at 14,00 kts
Bunker at max displacement = 2.620 tons

Complement:
1.450 - 1.886

Cost:
£13,018 million / $52,071 million

Distribution of weights at normal displacement:
Armament: 3.942 tons, 9,5%
Armour: 15.652 tons, 37,8%
- Belts: 4.727 tons, 11,4%
- Torpedo bulkhead: 874 tons, 2,1%
- Armament: 3.425 tons, 8,3%
- Armour Deck: 6.419 tons, 15,5%
- Conning Tower: 206 tons, 0,5%
Machinery: 1.486 tons, 3,6%
Hull, fittings & equipment: 16.725 tons, 40,4%
Fuel, ammunition & stores: 3.523 tons, 8,5%
Miscellaneous weights: 75 tons, 0,2%
- Above deck: 75 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
67.390 lbs / 30.568 Kg = 30,0 x 16,5 " / 419 mm shells or 11,9 torpedoes
Stability (Unstable if below 1.00): 1,20
Metacentric height 9,0 ft / 2,8 m
Roll period: 16,5 seconds
Steadiness - As gun platform (Average = 50 %): 71 %
- Recoil effect (Restricted arc if above 1.00): 0,59
Seaboat quality (Average = 1.00): 1,50

Hull form characteristics:
Hull has a flush deck,
a normal bow and a round stern
Block coefficient (normal/deep): 0,471 / 0,475
Length to Beam Ratio: 6,11 : 1
'Natural speed' for length: 26,87 kts
Power going to wave formation at top speed: 38 %
Trim (Max stability = 0, Max steadiness = 100): 47
Bow angle (Positive = bow angles forward): 40,00 degrees
Stern overhang: 19,69 ft / 6,00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 16,00%, 27,56 ft / 8,40 m, 21,00 ft / 6,40 m
- Forward deck: 34,00%, 21,00 ft / 6,40 m, 21,00 ft / 6,40 m
- Aft deck: 37,00%, 21,00 ft / 6,40 m, 21,00 ft / 6,40 m
- Quarter deck: 13,00%, 21,00 ft / 6,40 m, 21,00 ft / 6,40 m
- Average freeboard: 21,42 ft / 6,53 m
Ship tends to be wet forward

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 72,8%
- Above water (accommodation/working, high = better): 152,7%
Waterplane Area: 55.351 Square feet or 5.142 Square metres
Displacement factor (Displacement / loading): 104%
Structure weight / hull surface area: 236 lbs/sq ft or 1.154 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,93
- Longitudinal: 1,88
- 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
Excellent seaboat, comfortable, can fire her guns in the heaviest weather

75 kt for three aircraft carried
Granted, it has 2 guns less, but in return it has:

- 2 inch more deck armor (7 inches) and a full armored deck including fore and quarter deck to prevent shells plunging through to the citadel. This gives it way more survivability than your class, which is susceptible to enemy gunfire a full 5000 yards earlier. In short, this protection is the same as on the mexican ships, yours is way inferior.
- better belt armor. You have 13.5", this has 16" - and a full two feet higher belt as well
- Also, you forgot the engines in your ships. "No fuel, internal combustion engines..." Eh?
- It is a better seaboat and a better gunnery platform
- better turret armor as well.
- you have no superfiring turrets, meaning that your fire forward is decreased by half. My ship does have superfiring turrets
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Re: SDN World 3 Ship Design Thread

Post by Fingolfin_Noldor »

Well, I'm willing to offer this:

Exarchate, Byzantium Battleship laid down 1926

Displacement:
43,204 t light; 46,983 t standard; 50,341 t normal; 53,028 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(837.77 ft / 803.81 ft) x 98.43 ft (Bulges 108.27 ft) x (36.09 / 37.71 ft)
(255.35 m / 245.00 m) x 30.00 m (Bulges 33.00 m) x (11.00 / 11.49 m)

Armament:
9 - 16.00" / 406 mm 50.0 cal guns - 2,700.00lbs / 1,224.70kg shells, 120 per gun
Breech loading guns in turret on barbette mounts, 1926 Model
3 x 3-gun mounts on centreline ends, majority forward
1 raised mount - superfiring
16 - 5.00" / 127 mm 38.0 cal guns - 59.33lbs / 26.91kg shells, 2,000 per gun
Dual purpose guns in deck and hoist mounts, 1926 Model
8 x Twin mounts on sides, evenly spread
4 raised mounts
32 - 1.57" / 40.0 mm 60.0 cal guns - 2.14lbs / 0.97kg shells, 2,000 per gun
Anti-air guns in deck mounts, 1926 Model
8 x 4-gun mounts on sides, evenly spread
4 raised mounts
40 - 0.79" / 20.0 mm 39.0 cal guns - 0.22lbs / 0.10kg shells, 4,000 per gun
Anti-air guns in deck mounts, 1926 Model
10 x 4-gun mounts on sides, evenly spread
16 - 0.50" / 12.7 mm 12.0 cal guns - 0.04lbs / 0.02kg shells, 3,000 per gun
Machine guns in deck mounts, 1926 Model
16 x Single mounts on sides, evenly spread
Weight of broadside 25,327 lbs / 11,488 kg
Main Torpedoes
12 - 21.0" / 533 mm, 30.00 ft / 9.14 m torpedoes - 1.918 t each, 23.020 t total
In 6 sets of deck mounted carriage/fixed tubes
2nd Torpedoes
12 - 21.0" / 533 mm, 30.00 ft / 9.14 m torpedoes - 1.918 t each, 23.020 t total
below water reloads
Mines
6 - 0.00 lbs / 0.00 kg mines + 6 reloads - 0.000 t total
in Above water - Stern racks/rails

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 16.0" / 406 mm 422.00 ft / 128.63 m 19.00 ft / 5.79 m
Ends: Unarmoured
Main Belt covers 81 % of normal length
Main Belt inclined 19.00 degrees (positive = in)

- Torpedo Bulkhead - Additional damage containing bulkheads:
4.00" / 102 mm 422.00 ft / 128.63 m 35.00 ft / 10.67 m
Beam between torpedo bulkheads 68.00 ft / 20.73 m

- Hull Bulges:
1.00" / 25 mm 422.00 ft / 128.63 m 10.00 ft / 3.05 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 18.0" / 457 mm 14.0" / 356 mm 16.0" / 406 mm
2nd: 2.50" / 64 mm 2.50" / 64 mm 2.50" / 64 mm
3rd: 0.50" / 13 mm 0.50" / 13 mm -
4th: 0.50" / 13 mm 0.50" / 13 mm -
5th: 0.50" / 13 mm - -

- Armoured deck - multiple decks:
For and Aft decks: 7.00" / 178 mm
Forecastle: 1.00" / 25 mm Quarter deck: 1.00" / 25 mm

- Conning towers: Forward 9.00" / 229 mm, Aft 0.00" / 0 mm

Machinery:
Oil fired boilers, steam turbines,
Electric motors, 4 shafts, 65,115 shp / 48,576 Kw = 24.00 kts
Range 10,000nm at 14.00 kts
Bunker at max displacement = 6,045 tons

Complement:
1,679 - 2,184

Cost:
£13.500 million / $54.000 million

Distribution of weights at normal displacement:
Armament: 4,554 tons, 9.0 %
- Guns: 4,496 tons, 8.9 %
- Weapons: 58 tons, 0.1 %
Armour: 18,926 tons, 37.6 %
- Belts: 5,655 tons, 11.2 %
- Torpedo bulkhead: 2,186 tons, 4.3 %
- Bulges: 156 tons, 0.3 %
- Armament: 4,517 tons, 9.0 %
- Armour Deck: 6,147 tons, 12.2 %
- Conning Tower: 264 tons, 0.5 %
Machinery: 2,084 tons, 4.1 %
Hull, fittings & equipment: 17,565 tons, 34.9 %
Fuel, ammunition & stores: 7,137 tons, 14.2 %
Miscellaneous weights: 75 tons, 0.1 %
- On freeboard deck: 75 tons

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
80,068 lbs / 36,318 Kg = 39.1 x 16.0 " / 406 mm shells or 10.7 torpedoes
Stability (Unstable if below 1.00): 1.08
Metacentric height 5.7 ft / 1.7 m
Roll period: 19.1 seconds
Steadiness - As gun platform (Average = 50 %): 72 %
- Recoil effect (Restricted arc if above 1.00): 0.88
Seaboat quality (Average = 1.00): 1.41

Hull form characteristics:
Hull has a flush deck,
a normal bow and large transom stern
Block coefficient (normal/deep): 0.561 / 0.566
Length to Beam Ratio: 7.42 : 1
'Natural speed' for length: 32.92 kts
Power going to wave formation at top speed: 40 %
Trim (Max stability = 0, Max steadiness = 100): 51
Bow angle (Positive = bow angles forward): 30.00 degrees
Stern overhang: 13.12 ft / 4.00 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 25.00 %, 36.09 ft / 11.00 m, 24.61 ft / 7.50 m
- Forward deck: 30.00 %, 24.61 ft / 7.50 m, 19.69 ft / 6.00 m
- Aft deck: 30.00 %, 19.69 ft / 6.00 m, 19.69 ft / 6.00 m
- Quarter deck: 15.00 %, 19.69 ft / 6.00 m, 19.69 ft / 6.00 m
- Average freeboard: 22.80 ft / 6.95 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 79.9 %
- Above water (accommodation/working, high = better): 136.3 %
Waterplane Area: 58,093 Square feet or 5,397 Square metres
Displacement factor (Displacement / loading): 117 %
Structure weight / hull surface area: 227 lbs/sq ft or 1,109 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.97
- Longitudinal: 1.38
- Overall: 1.00
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
Image
STGOD: Byzantine Empire
Your spirit, diseased as it is, refuses to allow you to give up, no matter what threats you face... and whatever wreckage you leave behind you.
Kreia
Lascaris
Padawan Learner
Posts: 229
Joined: 2008-08-10 08:43am
Location: Rhodia, Nebular cluster

Re: SDN World 3 Ship Design Thread

Post by Lascaris »

Thanas wrote:Lascaris, I'd advise you to have at least 12" in the turret side armor, but of course it is your choice.
We've been at it before but which real life ship have 12in side armor for the turrets? For the Montana's for example it was 10in sides, 12in back and 9.15in top. Which works out to an average of less than 10in. For Iowa it was even less with sides 9.5in, back 12in and top 7.25.
Lascaris
Padawan Learner
Posts: 229
Joined: 2008-08-10 08:43am
Location: Rhodia, Nebular cluster

Re: SDN World 3 Ship Design Thread

Post by Lascaris »

Thanas wrote:
Norseman wrote:My advice? I would recommend that you use a Brazilian export design such as this one:
.
I would caution Ryan against that design simply because it has no superfiring armament.

I would instead advise to license one of the prized German 40kt export ships, for example the latest iteration of my Österreich class:
Bah we say

Plan 1917A, Cisplatina Enter ship type laid down 1925 (Engine 1926)

Displacement:
37.689 t light; 39.800 t standard; 42.115 t normal; 43.966 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(700,00 ft / 700,00 ft) x 108,00 ft x (32,00 / 33,16 ft)
(213,36 m / 213,36 m) x 32,92 m x (9,75 / 10,11 m)

Armament:
8 - 17,72" / 450 mm 47,0 cal guns - 2.900,01lbs / 1.315,42kg shells, 86 per gun
Breech loading guns in turret on barbette mounts, 1925 Model
2 x 4-gun mounts on centreline ends, evenly spread
20 - 5,00" / 127 mm 40,0 cal guns - 59,90lbs / 27,17kg shells, 150 per gun
Dual purpose guns in deck and hoist mounts, 1925 Model
10 x Twin mounts on sides, evenly spread
32 - 1,57" / 40,0 mm 60,0 cal guns - 2,14lbs / 0,97kg shells, 1.600 per gun
Anti-air guns in deck mounts, 1925 Model
8 x Quad mounts on sides, evenly spread
Weight of broadside 24.466 lbs / 11.098 kg

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 15,0" / 381 mm 410,00 ft / 124,97 m 16,12 ft / 4,91 m
Ends: Unarmoured
Main Belt covers 90% of normal length

- Torpedo Bulkhead - Additional damage containing bulkheads:
4,00" / 102 mm 410,00 ft / 124,97 m 29,98 ft / 9,14 m
Beam between torpedo bulkheads 88,00 ft / 26,82 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 18,0" / 457 mm 7,00" / 178 mm 14,0" / 356 mm
2nd: 2,00" / 51 mm - -
3rd: 0,50" / 13 mm - -

- Armoured deck - single deck:
For and Aft decks: 8,00" / 203 mm

- Conning towers: Forward 5,00" / 127 mm, Aft 2,00" / 51 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 93.229 shp / 69.549 Kw = 26,00 kts
Range 6.000nm at 16,00 kts
Bunker at max displacement = 4.166 tons

Complement:
1.469 - 1.910

Cost:
£13,404 million / $53,617 million

Distribution of weights at normal displacement:
Armament: 4.834 tons, 11,5%
- Guns: 4.834 tons, 11,5%
Armour: 15.545 tons, 36,9%
- Belts: 4.425 tons, 10,5%
- Torpedo bulkhead: 1.819 tons, 4,3%
- Armament: 2.350 tons, 5,6%
- Armour Deck: 6.768 tons, 16,1%
- Conning Towers: 183 tons, 0,4%
Machinery: 2.984 tons, 7,1%
Hull, fittings & equipment: 14.325 tons, 34,0%
Fuel, ammunition & stores: 4.426 tons, 10,5%
Miscellaneous weights: 0 tons, 0,0%

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
55.743 lbs / 25.285 Kg = 20,0 x 17,7 " / 450 mm shells or 9,4 torpedoes
Stability (Unstable if below 1.00): 1,29
Metacentric height 8,9 ft / 2,7 m
Roll period: 15,2 seconds
Steadiness - As gun platform (Average = 50 %): 58 %
- Recoil effect (Restricted arc if above 1.00): 0,54
Seaboat quality (Average = 1.00): 1,16

Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Block coefficient (normal/deep): 0,609 / 0,614
Length to Beam Ratio: 6,48 : 1
'Natural speed' for length: 26,46 kts
Power going to wave formation at top speed: 50 %
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%, 29,41 ft / 8,96 m, 18,72 ft / 5,71 m
- Forward deck: 30,00%, 18,72 ft / 5,71 m, 18,72 ft / 5,71 m
- Aft deck: 35,00%, 18,72 ft / 5,71 m, 18,72 ft / 5,71 m
- Quarter deck: 15,00%, 18,72 ft / 5,71 m, 18,72 ft / 5,71 m
- Average freeboard: 19,58 ft / 5,97 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 90,0%
- Above water (accommodation/working, high = better): 135,4%
Waterplane Area: 55.775 Square feet or 5.182 Square metres
Displacement factor (Displacement / loading): 96%
Structure weight / hull surface area: 219 lbs/sq ft or 1.069 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0,96
- Longitudinal: 1,47
- Overall: 1,00
Adequate machinery, storage, compartmentation space
Excellent accommodation and workspace room
Norseman
Jedi Council Member
Posts: 1666
Joined: 2004-07-02 10:20am

Re: SDN World 3 Ship Design Thread

Post by Norseman »

Thanas wrote:
Norseman wrote:My advice? I would recommend that you use a Brazilian export design such as this one:
.
I would caution Ryan against that design simply because it has no superfiring armament.¨
Uhm Springsharp 2.1 doesn't really make superfiring armament an option, which is why it's not explicitly mentioned. Since I can't get Springsharp 3 to work on my computer I'm sticking to 2.1. Thus my designs do have superfiring turrets, it's just not mentioned in the 2.1 writeup.

That said this was just a quick modernisation of one of my earlier designs... I forgot that bloody springsharp suddenly removes all your engine checkboxes when you change anything :( Let me re-jiggle my designs.
Norseman's Fics the SD archive of my fics.
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