Wednesday, 18 October 2017

Jigsaw joints from Dix Design

Dudley Dix introduced the plywood jig saw joints some time back.


These joints are used to connect flat ply panels such and bulkheads, hull and decks skins plus the decks.

From Dudleys blog.

Joining Plywood - Jigsaw or Puzzle Joints

I apologise for my long gap between posts, life has been very full for awhile.

Jigsaw joints have become a popular method for joining 8ft plywood lengths into the long panels needed for building most boats. It is an easy process for those who are building from a kit but it is impractical for most people building from scratch. If building from plans or from patterns then you will have to make every cut by hand using a jigsaw and the accuracy necessary for a close-fitting jigsaw joint is just not possible to achieve.

For those who have not seen a jigsaw joint, the form is exactly the same as the interlocking curves of a jigsaw puzzle, except that the interlocking curves are laid out in a straight line rather than in a grid pattern. This forms a very accurate and secure junction between the two parts, unable to slide apart and needing no clamps, while the glue sets.



For amateurs building bigger boats it is just not practical to assemble the panels before installation. Panels 8ft long are very convenient for one person to handle, without having to call on the wife, kids and neighbours to help with the task. I built the structures and interior of my Didi 38 "Black Cat" entirely single-handed. There was not a single piece of timber in that boat that I was not able to carry and set up without any assistance. But I made scarph joints by hand and I glued them in position.


Roy

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