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Monday, January 29, 2024

Laminated Upper Breast Hook

Here I go again another Mod.

Laminated Upper Breast Hook

 I decided to construct a laminated upper breasthook. Yes, as a retired old man I do have too much time on my hands, but the upper breasthook is a visually appealing section of the bow so let's make it a beautiful feature.

I used a combination of two contrasting-colored timbers, a red hardwood called Blue Gum (yes, a red colored timber called blue gum, go figure!) and a light-colored timber called Queensland Hoop Pine. I am also using the Blue Gum on the rub rails and Hoop Pine for the sheer rails, spars and cabin flooring so the timber types and colors will flow throughout the rest of the build.

I laminated the sections in situ on the build using plastic over the forward sheer clamps to prevent the breast hook from sticking to the sheer rails and the pieces held in place with clamps until the resin hardened.


When cured the breasthook will be shaped, routed and sanded prior to final fixing.





The laminated section is removed ready for sanding.











The breasthook is sanded top and bottom and the aft end is routed, its looking very nice.








The bottom is given a good saturation of epoxy prior to installation. The epoxy brought out the contrasting colors, I can't wait to see the upper surface when several layers of lacquer are applied. The astute may have noticed the groove in the bottom of the blue gum.... yes, what once was a floorboard is now a breasthook.







The unit is temporarily held in place with a single clamp and four 38mm SS screws.








Prior to gluing in place, I inserted 4 wires through the hull side into the screw holes. This is to ensure the holes line up and prevent splitting the timbers if the screw hole is missed.











The epoxied unit is clamped and screwed in place and left for a couple of days to set hard.








The breasthook is sanded down level with the sheer clamps and hull topsides, I think it turned out really nice. I can't wait to see the finished section when lacquered.





















Saturday, January 20, 2024

Sheer Clamp Installation

 After a Christmas break it's time to get back into the build.

Sheer clamp and cabin carlin installation.

The sheer clamps and cabin carlins are milled from Hoop Pine. I like working with this timber, it has a fine grain no knots and is easy to work. I used Hoop Pine for the cabin flooring (see the March 2023 post titled "Floorboard Sealing and Installation"

To assist the installation of the sheer clamps and to enable the timber to bend around the hull without breaking or splintering I decided to steam the timbers.

I used the plastic pipe from my gutter blowing attachment, but any PVC storm water pipe would be OK. In my initial set up I used a kettle to send steam up into the plastic tube, but I found too much heat was lost through the thin plastic tubing and the kettle's thermostat kept turning it off so....


 

I replaced the kettle with a saucepan and wrapped old towels around the pipe to keep in the heat.

I placed the sheer clamps in the steamer for 2 hours.





Here you can see the steam exiting out the end of the pipe.



 The timbers were immediately clamped in place and left to dry overnight.




When removed a nice bend is left in the timber.


The sheer clamps are epoxied in place and left for a couple of days to cure. Lots of clamps were used to hold them in place.