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Strip: Building With An External "Ladder" Strongback
By:James Doyle
Date: 10/20/2013, 7:07 am

I'm starting on a Cape Ann Expedition Sport. I built my Outer Island with an external strongback, and I want to use one on this build also. Thing is, that Vaclav's instructions and plans are based around an internal strongback. Jay's plans & instructions include Rocker measurements, Vaclav's do not. I figure that I can calculate the rocker measurements by:
Finding the widest form, measuring the distance from the top of the strongback cutout to the tip of the form, and making that distance "zero rocker"
Measure each smaller form in turn. "Zero Rocker" measurement minus new distance from beam cutout line to tip of the form equals amount of rocker.
I figure this should work, except for one thing. There IS no form located in the Dead Center of the boat. Vaclav refers to the zero rocker point as "the Center of Spine", and it is located between forms 11 and 12.
Any thoughts? Should I just do it with the internal beam?

Messages In This Thread

Strip: Building With An External "Ladder" Strongback
James Doyle -- 10/20/2013, 7:07 am
Re: Strip: Building With An External "Ladder" Stro
Oliver -- 10/20/2013, 7:32 am
Re: Strip: Building With An External "Ladder" Stro *PIC*
Greg Galloway -- 10/20/2013, 9:36 pm
Re: Strip: Building With An External "Ladder" Stro
bryan kapteyn -- 10/22/2013, 4:11 pm
Re: Strip: Building With An External "Ladder" Stro
aedie -- 10/22/2013, 5:11 pm
Re: Strip: Building With An External "Ladder" Stro
Bill Hamm -- 10/23/2013, 1:18 am
Re: Strip: Building With An External "Ladder" Stro
Allan -- 10/23/2013, 2:06 am
Re: Strip: Building With An External "Ladder" Stro
Etienne Muller -- 10/23/2013, 5:50 am
Re: Strip: Building With An External "Ladder" Stro
bryan kapteyn -- 10/23/2013, 8:58 am
Re: Strip: Building With An External "Ladder" Stro
Bill Hamm -- 10/24/2013, 12:47 am
Re: Strip: Building With An External "Ladder" Stro
bryan kapteyn -- 10/24/2013, 8:51 am
Re: Strip: Building With An External "Ladder" Stro
Oliver -- 10/24/2013, 9:22 am
Re: Strip: Building With An External "Ladder" Stro
bryan kapteyn -- 10/24/2013, 11:10 am
Re: Strip: Building With An External "Ladder" Stro
ddaniels -- 10/26/2013, 2:24 pm
Re: Strip: Building With An External "Ladder" Stro
Etienne Muller -- 10/26/2013, 3:07 pm
Re: Strip: Building With An External "Ladder" Stro
Marc Upchurch -- 10/26/2013, 3:20 pm
Re: Strip: Building With An External "Ladder" Stro
Björn Thomasson -- 10/26/2013, 5:51 pm
Re: Strip: Building With An External "Ladder" Stro
Bill Hamm -- 10/27/2013, 1:52 am
Re: Strip: Building With An External "Ladder" Stro
bryan kapteyn -- 10/27/2013, 10:41 pm
Re: Strip: Building With An External "Ladder" Stro
Bill Hamm -- 10/29/2013, 1:40 am
Re: Strip: Building With An External "Ladder" Stro
James Doyle -- 10/29/2013, 10:44 pm
Re: Strip: Building With An External "Ladder" Stro
Bill Hamm -- 10/30/2013, 2:22 am
Re: Strip: Building With An External "Ladder" Stro
Marc Upchurch -- 10/30/2013, 4:10 am
Re: Strip: Building With An External "Ladder" Stro
Allan -- 10/31/2013, 1:14 am
Re: Strip: Building With An External "Ladder" Stro
Bill Hamm -- 10/31/2013, 2:06 am
Re: Strip: Building With An External "Ladder" Stro
bryan kapteyn -- 10/31/2013, 12:48 pm
Re: Strip: Building With An External "Ladder" Stro
Marc Upchurch -- 10/31/2013, 1:59 pm
Re: Strip: Building With An External "Ladder" Stro
Bill Hamm -- 10/31/2013, 9:18 pm
Re: Strip: Building With An External "Ladder" Stro
Bryan Kapteyn -- 11/1/2013, 1:16 pm
Re: Strip: Building With An External "Ladder" Stro
Marc Upchurch -- 11/1/2013, 5:35 pm
Internal Strongback Videos
Nick Schade - Guillemot Kayaks -- 11/2/2013, 5:52 pm
Re: Internal Strongback Videos
Bill Hamm -- 11/5/2013, 1:59 am
Re: Internal Strongback Videos
aedie -- 11/11/2013, 9:27 pm
Re: Internal Strongback Videos
Bill Hamm -- 11/12/2013, 12:32 am
Re: Internal Strongback Videos
Robert Horstmann -- 11/20/2013, 8:38 am
Re: Strip: Building With An External "Ladder" Stro
Allan -- 11/3/2013, 3:03 am
Re: Strip: Building With An External "Ladder" Stro
James Doyle -- 11/3/2013, 4:49 am
Re: Strip: Building With An External "Ladder" Stro
Oliver -- 11/3/2013, 7:44 am
Re: Strip: Building With An External "Ladder" Stro
Bill Hamm -- 11/5/2013, 1:35 am
Re: Strip: Building With An External "Ladder" Stro
aedie -- 11/11/2013, 9:14 pm
Re: Strip: Building With An External "Ladder" Stro
Etienne Muller -- 11/3/2013, 5:52 am
Re: Strip: Building With An External "Ladder" Stro
bryan kapteyn -- 11/5/2013, 12:34 pm
Re: Strip: Building With An External "Ladder" Stro
Jay Babina -- 11/6/2013, 6:51 am