I recently purchased plans for a kayak. The plans call for building on an internal beam. I have built 8 kayaks on an external ("ladder") strongback, and exactly one on an internal beam, and I didn't like it. The form templates have a cutout marked for the beam, and no rocker measurements.
I think that I have a way to figure it out:
1. Find the form with the least distance between the beam cutout and the bottom edge, and mark it "0 rocker". Example: Form Nine, 16 mm=0 rocker
2. The next form, Form Ten, measures 18 mm from the edge of the cutout to the bottom of the form. 2 mm rocker.
3. Form 11 measures 22 mm . 6 mm rocker, etc.
These probably aren't the measurements I'll get in reality, but I hope I'm showing the general concept. Would this work?
Please, I don't want to start a debate about the merits of Internal vs. External strongbacks! Just wondering if anyone knows an easier way to do it. Thanks