Stringers have to be placed into the precut holes on the bulkheads. Bulkheads mean the vertical (perpendicular to the backbone), stingers mean the longitudinal (parallel with the backbone) structure parts of the sailboat.
After all stringers have been glued into their appropriate position the next step will be gluing the sheer clamp cleats, sawing and beveling the sheer clamp and place and glue the U shaped doublers onto the bulkheads.
Sheer clamps shape trapezoid, made from high flexible straight veins pine without wooden knots Epoxy used for gluing the parts onto each other,
Stringers are extended by gluing them to each other for raising the length up to the whole length of the boat. Before lengthen the ends of stingers must be sawn to sharp angle (4-5 times length than the width of the stringer) for increasing the surfaces to be glued. To reach the well connected surfaces the cutting operation must be executed precisely. This way I made a pattern installed onto the saw to get the appropriate and same angles.
Backbone drawing came on mylar in 1:1 scale. To be made of plywood, Running from the bow to the aft. It means the centerline of the boat. Slots on each bulkhead are precut – slots must be run straight precisely.
Vertical posts (on the building stock) are made from pine wood. These are fixed to the stock with M10 bolts. Bulkheads are fixed to the posts with the same bolts.
So, after cutting bulkheads, I need to build a stock for the boat. There are some suggestions by the designers about how to make building stock in different conditions. The first thing you should consider the ground. I have pure soil, clayey and hard ground. I don’t want to make concrete base, but I must ensure that the ground will be enough strength for support the boat during building without any shift. My solution making special plates under the plumb posts:
Building stock is made by pine wood. Poles and horizontal plank as well. The base of the poles are spiked to the soil ground with special paw plates.
The stock plan came with the drawings from the Designer. I’ve made the CAD drawing by the plan.
Not enough wide and long row material you need. We need to glue the pieces into each other. Before gluing I had to prepare the surfaces to be glued. Scarfing using electric plan, belt sander.
Stringers must be milled before placing and gluing them into the bulkhead holes. Rounded edges decrease the tension in the corner of the bulkhead holes.
Almost all the bulkheads are cut. I have to wait for warmer weather. We have been spoken with a chemical engineer of Alvin-Plast (distributor) and he suggested not to used the epoxy glue below 20 degrees (Celsius) [68 Fahrenheit]. In addition to the weather was too rainy last week and the same humidity condition will be expected for this week as well.
