I have now completed my second canoe which is a 16 foot white water so I think I am ready for a guide boat. I haven't started yet but I have gotten the material together to start a guide boat and I have the book Building an Adirondack Guide Boat and the boat patterns, but my question is this. I believe that the dimensions for the 16 foot boat has a width of approximately 38 inches. BUT I want a boat that is 41 inches in width. I have also considered an 18 foot boat that has a width of 46 inches. How is the easiest way to scale the width of the ribs out to 41 inches so that it is fair and dimensional for a 16 foot boat or 46 inches for an 18 footer. I have thought of taking the existing patterns and extending them on out to get the extra width but I don't know if that would work either.
I don't have a CAD so I can't do it on a computer that I know of. I know some might say that I don't need an 18 footer but it is not a matter of need it is a matter of want, so I just need to know how or what I should do or if it can be done. Thanks Don