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I've been playing with the free version of DelftShip (www.delftship.net) for creating hull designs. I've done quite a few designs by hand but I've never been able to see how I could create a faired hull with 2D CAD: it would be too cumbersome. As an test, I created a model of a 30 m "frigate". Although I didn't use all the tools for fairing the lines, it only took my about three hours to create this design. I found the tools for pushing and pulling the hull into shape reasonable intuitive. I've attached some of the output files: Lines drawing Table of waterline offsets (program can also output a point-cloud file) Hydrostatic data Resistance data - it looks like the hull speed is about 9 knots. Perspective renderings The program can also use a table of offsets to create a model. I didn't add decks, wales or ports, but the program is capable of this. I did manage to add the keel, masts and a bowsprit, however. I'm not sure the ship modeller will find this too useful, but there is an interesting feature for laying out the panels of the develop-able surfaces for chine boats. Those who research hull design, especially how it affects speed, cargo and armament capacity, and perhaps seaworthiness, could find it useful. I wonder how Chapelle's "Search for Speed Under Sail" would have benefited from being able to quickly do resistance analyses. If anyone wants the Delftship project file, please contact me: this forum won't all me to attach it. FrigateResistance.pdf FrigateHydroStatics2.pdf FrigateHydroStatics.pdf FrigatePerspective1.pdf FrigatePerspective2.pdf FrigateOffsets.txt FrigateLines.pdf
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