“Sunwski” — small boats that make the guys on “Pioneers yard” of the city of Astrakhan on well-proven technology. The main principle consists in wrapping the frame with fiberglass impregnating epoxy resin, which, solidification, forms a strong shell. By itself, it is of course, Nenov. However, it has features, which allows to significantly simplify the construction.
Fully preparing a first frame of the boat, the longitudinal edges of the wooden slats of the calculated thickness. The distance between adjacent stringers on highly curved surfaces must not exceed 100 mm. So, for large cambers, for example, in two directions it is recommended to put additional edges — thin strips: they will reduce the sagging tissues. You can also cover tight to the frame with nylon thread (crosswise) with an interval of not more than 50 mm. All the parts of the boat, which in the process will be in contact with glass should be well cleaned coarse sandpaper.
Technical manuals require before pasting the fabric to anneal at 200-250° (this is usually done with a blowtorch), or to clean out the sizing substances in acetone. However, for our work, as experience shows, is quite good enough to warm it in the oven of a gas stove to evaporate moisture and to “visarite” oil.
Cut out the fiberglass “sunwski” it is necessary so that the edges remained about 100 mm allowance. If fabric width is insufficient, it sew the overlap, with an overlap of 20-30 mm. Superimposed on the frame the fabric is stretched from the keel to the sides, and then along the body and secured with thin nails, but so as not to modify the natural tension of the fabric. “Raids” can be cut as well, laying the edges overlap and stitching them. They will be formed mainly in the bow — lines: our boats are designed so that they have straightened the hull and flat transoms. Remaining on the sides of the allowances are wrapped vnatyag for RUB rails and transom frame and sewn with nylon thread. After this impregnation of the casing is placed on the keel and again checks the quality of the stitched: folds and wrinkles should not be.