This is the start of the journey and of the processes needed to manufacture a 5085mm main mast for a Drascombe Drifter based on the Isle of Bute in The Outer Hebrides. It’s Neil’s detailed drawing of his present mast, its section relating to the base which has to fit his present fore deck Tabernacle and the positions of all holes and sheave slot locations.
I do not need to have your existing mast at NP22, with just a sketch and dimensions I can produce work to those perimeters.
From a manufacturing base this is where we start from. A sawn stock length of Canadian Douglas Fir of ‘Clear and better grade’, this is defined by its long clear grain and just small blemishes on the surface. This timber has alongside it the ‘Completed Mast’ so it’s a good standpoint to see the start and finish. Follow on to see the processes involved
We start with converting this balk sawn timber into a planed section. I now start to set out the details of the mast base to the dimensions of the Tabernacle it has to fit, these base measurements are 80mm x75mm, whilst the mast section is 74mm x 70mm, so this base has to be laminated to achieve this section.
Here we see the mast section. It’s time now to machine the 2 sheave slots to take the 74mm x 12.5mm sheaves and to form the mast head ‘Button Pin‘ which accommodates our stainless steel mast head ring and standing rigging lugs.
The completed Button Pin and sheave slots. With all the detailed drilling completed my next step before fitting the spindles to support the sheaves will be to thoroughly impregnate these slots with 50% thinned marine varnish.
You will need now to log on over the next 5 days to see this final process and to see the fully sprayed varnish finish applied to this quite remarkable piece of work before it leaves for the NW Isles of Scotland.
Part 2 can be found Here