Definition for those who I lost. Lofting is taking a set of numbers which are included in a Table of Offset. These numbers define the shape of the watercraft one sees as a completed craft. The numbers are then transferred to a plan sheet and the profile of the craft is drawn, the points from the Offsets are referenced to known lines on the craft, like the Waterline, or a Base Line, also to the Stations or Forms. (Think of the layers of a Cat Scan). I know there are a few here that could really chime in on this subject if I didn't explain it well. If I lost anyone, sorry.
I started the lofting process by establishing a base line with all of the perpendiculars which happens to be at each form in the craft. The form are spaced every 12" and the 2 end forms are spaced 6" from the next. I also drew in the waterline, allowing some room for notes as needed. Then it was off to transfer the numbers, this took a bit for me, trying to remember the steps. So, I have 4 books on the bench, 1 with the plans I am using and 3 others for reference. Once I got it, I was golden.
I plotted the points for each Form at the locations both above and below the waterline, also plotted the position of the sheer line, top of deck and keel. Once all the dots were in place it was time to connect them using a few battens and a french curve. I only drew half of each Form for now, so I don't get all of those lines confused. That is easy to do. Also drew in keel and deck lines to see the side profile. Probably can't see the little pencil dots. And I marked out for the cutout which will slide over the beam.
A few of the tools and a copy of the Table of Offsets, easier to use a copy and check off each point.
Might not be able to see many lines, but the stern is in there, more tools and books. I did this on top of the assembly table, unrolling the paper as I went along. Outside the floor, that is the largest surface I have in the shop. The length of the Kayak is 17'. So, I faired in a line for the keel and deck surface every 4 forms or so. I'll roll this out in the house and sight down the lines to ensure they are fair.
I do need to go back and draw a separate form pattern for each Form, I will plot this again on a sheet folded in half and then I can cut that out and paste it to the plywood stock that will be used for the forms.
Thanks for reading and following, comments are always welcome and appreciated.