Saturday 10 August 2024

Waterline & Boot Top | Levelling & Marking Up (Again...)

It was now time to mark up the waterline and boot top ready for painting, but first I had to make sure the boat was level athwartships as well as fore and aft.

Having done this twice before, I knew exactly what to do! A long spirit level is taped to the keel. like this.


And the same again across the transom.


The port and starboard quarters are then raised with a pair of bottle jacks and the hull is supported  by wooden blocks, like this.


We know the hull is level when the bubble is centred in each spirit level, as it is here.


The hull looked dangerously precarious sat on its stack of wooden blocks, so I decided to transfer support to a pair of heavy duty steel saw horses that I purchased some time ago, with something like this in mind. Here is one of them.


They are are adjustable in height and excellent for this task. Here is the port quarter sitting on its horse.


By great good fortune the hull was still almost level. Here is the bubble centred in the transom spirit level.


A small adjustment was required at the bow to raise it a touch, like this.


As you can see, the bubble in the keel spirit level was now exactly centred.


I had previously worked out that the waterline crosses the forward chine at a point exactly in line with the forward edge of the forward porthole. So I simply marked the spot with the laser level, like this.


It was then straightforward to mark in the waterline, as in this pic.


I knew that the blue boot top stripe should be 38mm at midships, so I marked that on a bit of tape to guide the laser level.


I followed the same line which was still apparent on the stripped substrate to mark up the line between blue and white above the boot top, again using the laser level.

I made small pencil marks along each line and joined them with a rule to obtain fair and flowing lines.

Here they are converging at the bow eye.


The transom was a bit trickier to get right, but here it is fully marked up.


And here is a close up of the transom at the starboard quarter.


I made a slightly better job of this than last time. I suppose some clouds do have a silver lining!


No comments:

Post a Comment