19 Aug 22:
We haven't forgot about MARGARET ROSE, a few small things got in thhe way. Her keel, deadwood, stem and transom are stored in the Sunfish Shack.
Showing posts with label margaret rose. Show all posts
Showing posts with label margaret rose. Show all posts
Friday, August 19, 2022
Thursday, June 4, 2020
Pascagoula Diamond Bottom Catboat MARGARET ROSE 01 Jun 20 Sheer Line and Skeg
01 Jun 20:
Played around with the sheer line for the catboat, gave her a little reverse curve aft of the beam.
And propped the keel batten up to see the shape of the skeg, plus checked out tiller placement.
Log of MARGARET ROSE.
Played around with the sheer line for the catboat, gave her a little reverse curve aft of the beam.
And propped the keel batten up to see the shape of the skeg, plus checked out tiller placement.
Log of MARGARET ROSE.
Sunday, April 5, 2020
Catboat Math 05 Apr 20
05 Apr 20:
There's the plan and then there's actually what happens. We have Chapelle's line drawing for a 17 foot diamond bottom catboat, and we planned to scale that plan down to 16 feet. Let's see that's .941176 smaller. So I did a bunch of measurements and scribbled all over a copy of the plans and headed out to the Carriage House to transfer those numbers onto a lofting on the Carriage House floor. But first I had to correct my highly calibrated blue tape baseline, and mark off 1 foot increments out to 16 feet. Then I used the square to find a perpendicular at each foot mark, took the steel tape to find the Feet-Inches-Eighths point, make a mark and put in a deck screw.
Somewhere along the way I remembered that I wanted to scale the beam of this boat down from 8'6" inside of plank to 8 feet outside of plank. I thought I could just reduce everything by 10 percent but instead discovered I needed to draw a new sheer line, and get those new measurements off of the new line. Fiddled with the fair curve and came up with a sheer that looks okay, pending Skipper's approval.
If Skipper is happy with it then we can pull new measurements off of the lofting at a few points to get the measurements we need for building molds and bulkheads.
Placed the rough keel batten down to start thinking about keel shape.
Log of MARGARET ROSE.
There's the plan and then there's actually what happens. We have Chapelle's line drawing for a 17 foot diamond bottom catboat, and we planned to scale that plan down to 16 feet. Let's see that's .941176 smaller. So I did a bunch of measurements and scribbled all over a copy of the plans and headed out to the Carriage House to transfer those numbers onto a lofting on the Carriage House floor. But first I had to correct my highly calibrated blue tape baseline, and mark off 1 foot increments out to 16 feet. Then I used the square to find a perpendicular at each foot mark, took the steel tape to find the Feet-Inches-Eighths point, make a mark and put in a deck screw.
Somewhere along the way I remembered that I wanted to scale the beam of this boat down from 8'6" inside of plank to 8 feet outside of plank. I thought I could just reduce everything by 10 percent but instead discovered I needed to draw a new sheer line, and get those new measurements off of the new line. Fiddled with the fair curve and came up with a sheer that looks okay, pending Skipper's approval.
If Skipper is happy with it then we can pull new measurements off of the lofting at a few points to get the measurements we need for building molds and bulkheads.
Placed the rough keel batten down to start thinking about keel shape.
Log of MARGARET ROSE.
Subscribe to:
Posts (Atom)