SpringSharp ship design software

Captain Obvious · December 2, 2008

http://www.springsharp.com/

I haven't fiddled with this any, but someone pointed it out on Space:1889 mailing list I'm on, and it looks pretty interesting. It lets you design realistic ships that could have been built between 1850 and 1950. No weird science options, but that should be easily fixed. Anyway, it looked interesting enough to toss out there as a heads-up for the gearheads.

Sample Output File by Sven Fenske (reworked for Version 2.1)

Bismarck, Deutschland Battleship laid down 1936

Displacement: 40,064 t light; 42,084 t standard; 46,674 t normal; 50,346 t full load

Dimensions: Length overall / water x beam x draught

820.21 ft / 792.49 ft x 118.11 ft x 30.51 ft (normal load)

250.00 m / 241.55 m x 36.00 m x 9.30 m

Armament:

8 - 14.96" / 380 mm guns (4x2 guns), 1,763.70lbs / 800.00kg shells, 1934 Model

Breech loading guns in turrets (on barbettes)

on centreline ends, evenly spread, 2 raised mounts - superfiring

12 - 5.91" / 150 mm guns (6x2 guns), 102.98lbs / 46.71kg shells, 1928 Model

Breech loading guns in turrets (on barbettes)

on side, evenly spread

16 - 4.13" / 105 mm guns (8x2 guns), 35.32lbs / 16.02kg shells, 1933 Model

Anti-aircraft guns in deck mounts with hoists

on side, evenly spread, all raised mounts

16 - 1.46" / 37.0 mm guns (8x2 guns), 1.55lbs / 0.70kg shells, 1930 Model

Anti-aircraft guns in deck mounts

on side, evenly spread, all raised mounts

16 - 0.79" / 20.0 mm guns (10 mounts), 0.29lbs / 0.13kg shells, 1930 Model

Anti-aircraft guns in deck mounts

on side, evenly spread, 14 raised mounts

Weight of broadside 15,940 lbs / 7,230 kg

Shells per gun, main battery: 120

Armour:

- Belts: Width (max) Length (avg) Height (avg)

Main: 12.6" / 320 mm 562.34 ft / 171.40 m 16.40 ft / 5.00 m

Ends: 2.76" / 70 mm 229.33 ft / 69.90 m 9.51 ft / 2.90 m

0.82 ft / 0.25 m Unarmoured ends

Upper: 5.71" / 145 mm 562.34 ft / 171.40 m 7.22 ft / 2.20 m

Main Belt covers 109 % of normal length

- Torpedo Bulkhead:

1.77" / 45 mm 562.34 ft / 171.40 m 30.05 ft / 9.16 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)

Main: 14.2" / 360 mm 7.09" / 180 mm 13.4" / 340 mm

2nd: 3.94" / 100 mm 1.30" / 33 mm 3.15" / 80 mm

3rd: 0.79" / 20 mm 0.39" / 10 mm 0.79" / 20 mm

- Armour deck: 5.02" / 128 mm, Conning tower: 13.78" / 350 mm

Machinery:

Oil fired boilers, steam turbines,

Geared drive, 3 shafts, 137,994 shp / 102,944 Kw = 28.67 kts

Range 8,525nm at 19.00 kts

Bunker at max displacement = 8,261 tons

Complement:

1,587 - 2,064

Cost:

£18.680 million / $74.720 million

Distribution of weights at normal displacement:

Armament: 1,903 tons, 4.1 %

Armour: 17,160 tons, 36.8 %

- Belts: 6,165 tons, 13.2 %

- Torpedo bulkhead: 1,108 tons, 2.4 %

- Armament: 3,305 tons, 7.1 %

- Armour Deck: 6,198 tons, 13.3 %

- Conning Tower: 385 tons, 0.8 %

Machinery: 3,872 tons, 8.3 %

Hull, fittings & equipment: 17,046 tons, 36.5 %

Fuel, ammunition & stores: 6,610 tons, 14.2 %

Miscellaneous weights: 83 tons, 0.2 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship):

79,862 lbs / 36,225 Kg = 47.7 x 15.0 " / 380 mm shells or 14.4 torpedoes

Stability (Unstable if below 1.00): 1.26

Metacentric height 9.7 ft / 3.0 m

Roll period: 15.9 seconds

Steadiness - As gun platform (Average = 50 %): 50 %

- Recoil effect (Restricted arc if above 1.00): 0.30

Seaboat quality (Average = 1.00): 1.05

Hull form characteristics:

Hull has a flush deck

Block coefficient: 0.572

Length to Beam Ratio: 6.71 : 1

'Natural speed' for length: 28.15 kts

Power going to wave formation at top speed: 50 %

Trim (Max stability = 0, Max steadiness = 100): 47

Bow angle (Positive = bow angles forward): 32.00 degrees

Stern overhang: 9.68 ft / 2.95 m

Freeboard (% = measuring location as a percentage of overall length):

- Stem: 28.87 ft / 8.80 m

- Forecastle (16 %): 21.16 ft / 6.45 m

- Mid (50 %): 18.60 ft / 5.67 m

- Quarterdeck (13 %): 21.16 ft / 6.45 m

- Stern: 22.31 ft / 6.80 m

- Average freeboard: 20.82 ft / 6.35 m

Ship tends to be wet forward

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 71.1 %

- Above water (accommodation/working, high = better): 159.1 %

Waterplane Area: 66,686 Square feet or 6,195 Square metres

Displacement factor (Displacement / loading): 116 %

Structure weight / hull surface area: 196 lbs/sq ft or 959 Kg/sq metre

Hull strength (Relative):

- Cross-sectional: 0.99

- Longitudinal: 1.07

- Overall: 1.00

Hull space for machinery, storage, compartmentation is excellent

Room for accommodation and workspaces is excellent

Curufea · December 2, 2008