Meanwhile while I continue with sanding, I decided to start on the deadwood (I know. All my wood is dead) as light relief. The deadwood has to fit the curve of the hull at the bottom (upside down as constructed) and provides a flat surface at the top tapering to a point at the highest point of the hull. It is made of 6 layers of ply, faced on either side with Iroko.
The first stage is to make a template. A couple lengths of 25 x 25mm allowed me to roughly measure some thin plywood to make the template.
I positioned the piece of plywood to mark a line parallel to the hull.
I decided to take two steps. First cutting enough off my template to get it closer to the hull.
Secondly marking a cutting the full hull curve for a good fit.
The top surface is defined on the drawings by a measurement from the waterline along the line of the transom. I used a laser level to provide a reference from which to measure and mark the waterline.
And then lots of measuring to get the line of the prop shaft in the right place and the cutout for the prop the right size. My decision on prop size is now locked in!
And this is how the template looks.
My next step is to drill a hole in the hull (oh no!) for the prop shaft tube. This is not something that I can have a few goes at so I will spend a few days researching.