Re: Why a Flat-bottomed Pram for Fly-fishing?

Posted by Charlie43 on
URL: http://riverswest-forums.266.s1.nabble.com/Why-a-Flat-bottomed-Pram-for-Fly-fishing-tp511p512.html

For that table of offsets to make sense --and for you to be able to make changes and then produce cutting patterns--, you need to install Gregg Carlson's HULLS program, which is the easiest to use of the half dozen, freeware, marine CAD programs out there. The downside of HULLS is that it's legacy software that Win 10 won't run unless you tell it to run using an earlier version of Windows.  If you have trouble, find a YouTube video that will walk you through the process. But get HULLS installed, or else you won't be able to build a boat that matches your height and weight, which isn't likely to be my 5'6" and 120 pounds.

https://carlsondesign.com/projects/hull-designer/

Gavin Atkin has written a tutorial for HULLS, but it's mostly a confusing waste of time. The way to learn HULLS is to open it up and to start clicking on things. Once you've gotten used to dragging lines and entering numbers, then find a library example that's close to the boat you want to build. Make your changes to its dimension, clear old patterns, save the file with a new name, and then open the nesting patterns to see how your boat lays out on ply. If all looks well, then loft enough of the boat to pick up the bow and stern angles and make drawing for the transoms.

That summary paragraph won't make sense to you unless you've learned how to use HULLS and have already built a boat or two.  So I'm going to have to slow down and walk you through each step in tedious detail. But the first step --some how, some way-- is to get HULLS installed, as well as this freeware grafting program. https://www.padowan.dk/download/