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Bill Perkins
07-17-2003, 09:53 PM
I was wondering if there was a rule of thumb for setting the length of plank gains . I'm building a 24 footer , what would be typical?

TomRobb
07-18-2003, 10:21 AM
My 2 cents,
I'd think it's at least partly, if not mostly aesthetic. You want to see a nice sweet sweep to the shadow line as the plank laps die away into the stem. :cool:

Chadd Hamilton
07-18-2003, 10:50 AM
I would guess ~ 1/2" per foot. So a 10 - 12" gain would seem right for a 24 footer, Bill. What design are you building anyway?

Bill Perkins
07-18-2003, 10:19 PM
Chadd I'm building an open launch by R. D.Culler .I've got a profile view but the run of the plank is shown , not the gains .I guess I'll trace over that drawing and try your suggested dimensions .

http://www.imagestation.com/album/?id=4290208883

[ 07-18-2003, 11:20 PM: Message edited by: Bill Perkins ]

Paul Scheuer
07-18-2003, 10:57 PM
Nice build record there Bill. As for the gains, it's mostly aesthetics. You just want to eliminate the "chunkiness" that would result if you ran the laps all the way out to the ends.

You can try a couple of your practice pieces to get to an "eye sweet" line, then just make sure you stay consistent.

I blended the transition from the beveled lap to the gain. At the bow you get a second chance to get everything right by smoothing the plank. At the stern you do want to get the gain cut right if it will show at the transom.

http://www.imagestation.com/picture/sraid19/p040a5ec324b41394d2220cc2aa5bc45c/fdc91cee.jpg

windfall
07-19-2003, 07:04 PM
I would say the planking thickness is the determining factor in gain lenght. 3/8-1/2" I would run betwean 12-18" to insure a smoothe progression to the flush stem.