TRIMARAN… FOUR BOATS

Diamond-shaped construction of the boat in plan and triangular in cross sections and convex curves of the sides gives the whole structure a special strength and toughness, difficult to achieve in conventional folding boats. The trimaran is self-righting in the water, steady on course and speed. The paddler sits in it, as the kayak — facing forward, but rowing is less tedious. This contributes to the natural (high) landing rower when his feet rest on the bottoms of the side compartments, and hand paddle are located at waist level. Detachable two-bladed paddle canoe of the type made from a sheet of aluminum and old ski poles.

Each compartment of the boat consists of two identical plywood sidewalls, joined at the keel rojalnoj a loop length of 600 mm. Loop riveted to the sidewalls, but can also be used short screws with subsequent raskladyvanii them all. In addition, stacked along the sidewall on three sides of the perimeter (except for the top — flanges) are covered with a strip of rubberized fabric (can be covered and dense tarpaulin) width of 60 mm Strip is a sort of fabric hinge allows the sides of the compartment to spread out.

 

 

 

Option the boat three compartments

 

 

 

 

The hinge in the open state feels stunnah significant loads directed to the separation of the fabric from the sidewalls. Therefore, stevne reinforced — stitched synthetic pinned thread through the awl holes in increments of 8-10 mm and the seams are coated with waterproof glue. And again. To protect joint tissue from abrasion keel compartment is further covered with a narrow strip of rubber cut from old Bicycle inner tube.

 

The side compartment in the middle — in the areas of maximum fracture when disclosure is slotted with a hacksaw to a depth of 130 mm. Slots taped pads made of the same rubberized fabric. To pads when you repeatedly opening the compartment was cut from plywood, they, like stevne stitched with synthetic threads with the same step 8— 10 mm and the seams are coated with waterproof glue.

 

Edges of the boards are covered with narrow strips of dense fabric, which give the bays a finished look and protects the edges from damage.

 

Glued compartments sanded, impregnated with linseed oil and painted outside and inside with two layers of enamel PF-115.

 

Between the compartments are connected with eyelets, curved duralumin plates are available in the “nose” and “stern” of each compartment. The eyelets attached to the sides with countersunk screws through the dural lining.

 

For production boats it took me three standard sheet of 4 mm construction plywood size 1525×1525 mm. All the blanks of the sides I cut one circular saw. To do this, sheets of plywood were first dissolved into strips of a width of 500 mm so that the fibers of its external layers were oriented in the longitudinal direction. Eight bands folded in a pile, bonded at the corners by nails, on the top caused by drawing the contours of the side plates and drilled side holes and the holes for the screws on the lugs. According to the planned contour cut blanks with a hacksaw and made two parallel cutting in the sides.

 

Manufacturer compartments of the plywood side panels and rubber strips, using waterproof glue for wood and fabric more efficiently under pressure. So I used the simplest press: glue each compartment clamped with corners and screws between two sheets of chipboard, cut to the contour of the sidewall with a small allowance. Plywood, particle Board separated by plastic film.

On the shore the boat I’m building in the following order. First, all four compartments are fastened by one Central bolt. For that the side compartments are put together, and the end (bow and stern) placed between them so that the inner side holes and side holes of the lugs of the limit match. Through these holes pass the center bolt with washers and tighten nut. Pushing his foot into the opposite Board of the far side of the compartment, pulled the middle Board and put yourself between the Bank, aligning its pins with the outer side holes. Then breed the side of the end compartments and insert the spacers. Bolts on the struts wear eyes side compartments and tighten the nut. To banks or struts do not accidentally slipped and did not cause serious injury, insert the pins first next to his hole, and then in the future. The center bolt of the bolts and spacers are not experiencing heavy loads, so much of wing nuts do not tighten.