Originally Posted by bobperry
Thanks Gary. You can ask any questions you like. I'm here for my own pleasure and it would be my pleasure to help you.
Rod is a good guy. Years ago he did an exhaustive study on stability and roll over stastics. The result was the boats with the best stability number were more prone to roll overs. I'm not sure anyone listened except me.
Get Macsurf. That will help you desging hulls and VPP's.
Learn Rhino or solid works. That will help you with the bull **** element of design that is becoming so necessary today. Do you have any idea ho m,any boats I designed with a pencil, some curves, a few splines and weights, and my meager brain. Many.
I have to go. I should not post after half bottle of wine.
Get all the software. It will make you a genius.
I'm not exactly sure what software Olin Stephens used.
I know Bill Garden laughed at the idea of software.
Bill Atkin never heard the term "software"
I'm not trying to scare you off.
I'm trying to put things into perspective.
I have Rhino, Solid Edge, and AutoCAD, and I started on a board. However I am a block and cylinders kind of guy, not the sexy curve kind. When someone is really good at what they do, they make it look really easy, and software doesn't make you good.
I've always wanted an aluminum boat. I really like working with aluminum, I can cut it, weld it, and machine it. I bought a set of plans from Brent Swain for his 31 foot Origami style hull. It is mostly conical sections, but the bow and stern have some compound curvature pulled into them during construction. The boats have a partial chine that falls just below the waterline and the hull is extremely fair without any filler. I have sailed on one of his 36 footers in steel and was very impressed with how it sailed.
The big problem is that few home built boats ever get finished. With the origami method the huge amount of work isn't in the hull, it's fitting out, like any boat. Brent's plans don't specify an interior, everyone builds what they want. Most turn out poorly I believe because people start building the interior in the hull without knowing how everything will fit. I wanted to accurately model the hull so that I could layout the interior completely before building anything. Then I could have the hull plates CNC plasma cut, and all the interior parts CNC router cut, essentially producing a kit of parts that should substantially reduce the risk that I wouldn't get it done.
The tough part is modeling that compound curvature at the bow and stern. I believe that I figured out a way to calculate quite closely, but then life got in the way and I haven't played with it any more for a few years.
Gary H. Lucas