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capefox
01-16-2014, 12:21 PM
Is this the correct way to measure the ply panels off an existing SAG multi-chine boat you want to replicate?
1. Bend a batten laterally across the panel and create an arbitrary line lengthwise
2. Mark the lateral line on the panel
3. Draw perpendicular lines on the panel every six inches (150 mm) along the lateral line
3. Measure and record: (a) the length of the lateral line, and (b) the distance above and below the lateral line at each station?

slug
01-16-2014, 12:43 PM
Not sure what you mean by panel dimensions ? are you recreating a boat ? is this a hard chine boat ? If so LOA then measure the position of the chine at several stations...

Then use a camera to take pictures...blow up the picture, photo copy, cut out profile , bow stern, sheer, with scissors.....then scale .

If you need a techincally correct take off , ask others...I only know how to take off the lines of small fishing skiffs and these lines are only approximate.

donald branscom
01-16-2014, 12:58 PM
Is this the correct way to measure the panels off an existing boat you want to replicate?
1. Bend a batten laterally across the panel and create an arbitrary line lengthwise
2. Mark the lateral line on the panel
3. Draw perpendicular lines on the panel every six inches (150 mm) along the lateral line
3. Measure and record: (a) the length of the lateral line, and (b) the distance above and below the lateral line at each station?

If it was me I would get thin strips of wood and a hot glue gun and make a precise pattern, then remove it and lay it flat on my panel. Trace and cut. Then if will fit perfect.

capefox
01-16-2014, 01:23 PM
Donald do you have photos or a sketch of this process. I'm having a hard time picturing it. Thanks.

01-16-2014, 01:49 PM
I am picturing tacking a thin strip along each edge of a "panel" in a multi chined hull, then joining those thin strips with additional thin strips, say, every foot or so, then removing the entire mess, all tacked together and using it as a full size pattern, much like spiling a plank on a hull.

strip tacked at top edge of panel_____________________________________________ _______________________________________________

strip tacked at bottom edge of panel_____________________________________________ ________________________________________________

Then hot melt glue similar strips joining top and bottom to make a complete full size pattern of the panel (better if I could draw vertical lines joining the two together, but I cannot.)
Remove and lay on the ply and use as a pattern.

Does that help?

Peerie Maa
01-16-2014, 02:04 PM
They both mean for you to make on of these for each panel:
http://www.diy-wood-boat.com/image-files/spiling3.jpg

01-16-2014, 02:28 PM
They both mean for you to make on of these for each panel:
http://www.diy-wood-boat.com/image-files/spiling3.jpg

That's what I was tryin to say ...

capefox
01-16-2014, 02:32 PM
Thanks. Now I get it. Looks like this fellow is doing something similar on a glued lap boat.