Finally the stringers are glued. It was a tricky and sometimes physical job.

You can find information about cutting and preparing procedure of the stringers here:  (see my blog: https://minisailer.ch/?p=362)

Preparing:

First of all, it is very important to get a good knowledge of the ClassGlobe 5.80 contours. The stringers must installed according to the chines and shape of the hull. Therefore I studied the plans and many builder blogs. Then i was able to develop a feeling for the angulation and twist of the stringers.

Since i`m building from plan i had few information about the dimensions and position of the cut-outs for the stringers. The exact meassures are not included in the ClassGlobe 5.80 plan. One more time i have to take these details from the CNC-kit parts. Thanks i`m in touch with builder colleagues. Some stingers (mainly the one of 30mm dimension) are placed in the middle from the joints of most frames. But not in the bow area.

I split the stringers gluing in 3 steps. First i installed the 30mm stringers. This is the easiest part of this progress and you give the sensible frames construction stiffness that you`ll need when putting in the following stringers. The second step was to glue the 50mm chine stringers and last ones where the 70mm stringers at the deck level. It is important to glue the both corresponding stringers in one time so there will be no twisting of the hull.

Attention! The stringers are the foundation for the planking. Every mistake here will punish you with bumps in the planking that later give you a lot of work when filling and sanding. So be sure and check the position of the stringers with a level before gluing.

Tools:

With some helpful tools you can make the tough job of cutting out the frames, bending and shaping the stringers a little bit easier.

Some self-made tools are useful to get control wether the stringers are placed sufficiently, to bend them and hold in place (2 forks for the twist, templates and a gauge to measure the hight).

Jig modification and strenghening:

The jig needs to be strengthened as there is a lot of torsion in the bow area when installing the stringers. If frames D, E and the stem are not properly attached they could get warped.

I built scaffolding to the sides to make it easier working at height and to have better ergonomics.

Cut-out`s in the frames:

The best way to cut out and grinding work on the recesses in the frames is to use a reciprocating saw, japanese saw, chisels and carpenter`s mallet, as well a small belt sander and wood rasps. For sure you need a lot of small clamps and lashing straps to hold the stringers.

I clamped the stringers in place and marked the position and angle of the cut out. With a mixture of drilling, sawing out with the Makita reciprocating saw and grinding with the belt sander and wood rasp, I got very precise cut-outs for the stringers.

Check again and again in between with the helper tools.

30mm stringer:

It is best to start with the 30mm stringers. As soon as these stringers have been glued, the construction is fixed and can no longer move. I was so glad when those stringers where glued. Finally, I no longer had to measure and check the distances and remeasure again and again. When doing the cut out in the stringers i checked theses recesses with this small 30mm try in block.

In the bow area there is a lot of twist and bending to the stringers. I was lucky to have these self-build forks to manage the twist of the stringers.

In the area of frames D` and D the stringer makes a strong kink. Here I have made an attachment to the jig post so that I can attach a strong clamp to press the stringer.

The chine stringers:

I made bending the stringers a little easier by already planing off the 50mm chine stringers. With this they lose some regidity and are easier to bend.

70mm deck level stringer:

This stringer isn`t lowered into the frames everywhere. At frames S, C and D` and D it is fully integrated. At transom, frame A, frame E and stem cap this stringer is only 45mm attached. 25mm are outside of deck level which will be planed later when the hull is turned and the deck is made.

When adjusting the stringer there is a lot of stress on frame S and it could get warped. Therefore i installed two bars while gluing the stringer.

Mission completed

Happy days are coming! The boat is taking shape. Heading forward now for planking.