Centreboard and transom.
tony o'connor
The transom is made from two pieces of 9mm ply, with mortices for frames cut into the inner sheet, these are slightly different sizes but when glued together with their top edges flush they assume the bevel required for the planking.
Both faces to be glued are sealed first, then thickened epoxy is spread on one face and they are clamped together, I used a few small screws to prevent them sliding around while the glue set, also I glued them in the morning so I could keep an eye on the mortices and make sure to clean out any glue that squeezed into them or else they would have been completely blocked with thickened epoxy,
Sealing the face of the inner layer of the transom, the thin slots are mortices for frames and must be kept clear of thickened glue , also visible are cutouts for the motor, boomkin, sculling notch and tiller
Sanding the boomkin hole.
The two layers are slightly different sizes which gives a stepped outer edge which gives the bevel for planking.
Transom is fitted by locating fore and aft frames into the mortices in the inner layer, these will be filleted later.
Centre board case.
Sealing the inner face of centreboard case
Read for glassing
After two layers of glass cloth and covered with peelply
The spacers were also sheathed with two layers of cloth and then fixed to one side, but because they are radiused on two inner corners These corners had to be sheathed in-situ.
When the glass had cured the box was finally glued together, Offcuts from the spacers are used to make sure the box sides are parallel while the glue cures.
Centreboard case finished and ready for sealing and fitting.