Tag Archives: Gunter yawl

Caledonia yawl project: joggle stick and making the frame

The plans drawn by Ian Oughtred are incredibly detailed but there are several rig options to include in the plans and so some details are just lightly addressed. The one that popped up for me was with the choice of the gunter yawl rig the plans show the location of the  chainplates and frame for the gunter sloop rig but not gunter yawl.

20180203_185252

I had to do some math to look at the distance of the mast step from the chainplates and frame location and then transfer that based on the location of the three sail gunter yawl mast location on the plans. I guess it is there but you have to work a little harder to get the answer.

20180127_151851

I have committed to my approach and now the challenge was to measure the shape of the frame I will have to laminate at the intersection of the chainplates. I read a nice description of the use of the “joggle stick” by John Welsford http://www.duckworksmagazine.com/15/howto/jogglesticks/index.htm#.WnklLvyIY0M

Which I liked as a faster process than making a template with hot glue.

20180127_152412

Pardon the low quality of images, the protective lens on my cell phone cracked unexpectedly in the cold. I’ve been able to fix it and the camera is back to its old form.

Then transferred the joggle stick points to a sheet of plywood.

20180127_165630

I also glued down the floor 2.5 and started to fillet all the laps on the inside of the hull.

20180203_185058