The general build of this piece originally was to use a solid piece of Iroko at 16mm in thickness. It is a shallow sweep over its 1200mm length and was achieved by soaking in water or steaming. This achieved, it was secured to either side flange wings. The biggest problem that has manifested itself is that Iroko has a wild and open grain and from the photos I’ve attached previously the pressures incurred at the Mizen mast socket/step position has resulted in splitting through the piece and effectively destroying itself.
This method in my view was a cost cutting exercise as opposed to producing a steamed laminated section with each laminate from a different board so there was no chance of a common through grain structure. It is practice, to achieve a high level of strength in a curved format without the requirement to introduce large sections in the timber is to go to the ‘Glue Lam‘ method. So for this small transom piece which is only 16mm in thickness it is necessary to make it out of a 3 section of laminate.
I start with the 3 Iroko boards thicknessed to 28mm and a bandsawn slice taken off each board and made up to one unit of 3 laminates.
This shows the initial process of forming after being steamed so that the laminates taken on that new shape.
Following the forming process and now left to dry out before returning to the forming mould when epoxy resin is applied
So after this stage when the laminates have the epoxy adhesive applied they are put back into the forming clamps to cure into this form shape. Out of the former and the overall shape of the transom board can be achieved.
Finally, out of the curing process, the profile cut to match the pattern supplied, cleaning and work on the corners with chamfers and Radius. All complete.
No more issues with splitting Dabber Mizen steps, these are ‘Bomb Proof’
I collected the dead caping piece from Rick in Exmouth to replicate with his personalised fittings, however, Stephen based out on the east coast sent me a paper pattern of his disintegrated Mizen step. From this paper pattern I replicated the required shape .
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