FOR EVERY DAY AND HOLIDAYS

FOR EVERY DAY AND HOLIDAYSA lot of us country lovers powerboat, or rather one of its varieties — far sports travel. For them, the boat become not only a means of transportation, but also a kind of house, sometimes for quite a long time. But for the residents of the settlements located on the banks of rivers or reservoirs, a motor boat is an everyday mode of transport: whether to go for food in the neighboring village to the district center to the doctor, to go fishing or hunting — in many places this can be done only by water.

In principle, the industry manufactures small boats for commercial and sporting use, however, despite this, recently more and more city dwellers and rural residents learn “the profession” Builder-lover. Caused by that desire not only increased the deficit, although an important factor, but the presence of specific requirements appropriate to the particular operating conditions.

 

Offer readers a project Motorboats “Version 2” — an attempt to create a simple design that could be replicated at home without much cost, at the same time, despite its simplicity, has a good hydrodynamic qualities and use as a utility crew, and boats for long hikes.

Fig. 1. The Motor Boat

Fig. 1. The Motor Boat “Version 2”:

1 — aft rail (2 PCs, Ø pipe 20X1 mm, stainless steel), 2 — feed a duck (2 pieces), 3 — the seat back (foam polyethylene), 4 — glass guard (glass 4 mm thick), 5 — lamp masthead, 6 — rod light (tube Ø 18X1 mm, stainless steel), 7 — coaming, 8 — bow rails (tube Ø 20X1 mm, stainless steel), 9 — duck bow (2 PCs), 10 — eye (area stainless steel, 4 mm thick), 11 — seat bow, 12 — soles (Reiki 20X20 mm), 13 — otmecheny signal lamp (2 PCs, right red, left green), 14 — drivers seat, 15 — plancher (plywood 16 mm thick), 16 — seat aft, 17 — transom capacity.

 

For hull selected modern lines, typical currently, for many planing boat (see “Boats and yachts” № 2, 1989: D. Kurbatov. “Boat “Murena”). Moderate deadrise bottom (17° at the transom) allows you to maintain high speed and provides good stability on the course. Overloading on the excitement experienced in such a case, small. The longitudinal planing steps improve the dynamic properties, minimize the amount of spray escaping from underneath. High coamings and large width of the hull allow the ship to four passengers. On top of advocating for the transom volumes have extensive grounds, bounded by bulwarks that makes it more convenient and safe procedure for changing the water screw or dowel on the shaft.

 
The boat is equipped with double seat for driver and passenger mounted in the diametrical plane. Passengers may also be accommodated on the sofa near the transom or the bow. Of course, use all the seats should be based on the overall load so that was always a small trim by the stern. Under the front and middle seats are equipped with sealed boxes for Luggage storage. And under the aft compartment where the petrol tank, spare parts for motor and tools. Along the sides inside the secured holders-cradles for pole vault, oars and fishing rods.
 
The motor control is carried out remotely from the Central post. Here, on the side surfaces of the control rack, mounted otmecheny signal lights, and a small post — top lantern.
 
The housing design and the technology of its production is fairly typical for Amateur boat building. The base of the housing are transverse (five frames and the transom) and longitudinal members (keel and RUB rails, bilge stringers). Since subsequently glued plywood hull with fiberglass, the cross section of the used rails and the thickness of the cladding can be significantly less than the same dimensions, but purely wooden structures.
 
Fig. 2. The design of the case.
Fig. 2. Form factor:
1 — plancher (plywood 16 mm thick), 2 — coaming (brand PS foam, covered with fiberglass), 3 — fender (15X30 mm), 4 — bow brestoc (Board thickness 20 mm), 5 — stem and keel beams (25X30 mm, glue 2-3 strips), 6 — bilge stringer (rail 15X20 mm), 7 — Shorty (strap 20Х30Х70 mm), 8 — Shorty the attachment of the keel to the frames (strap 20Х75Х120 mm) 9 — brestoc bilge stringers (Board thickness 20 mm), 10 — a temporary bracket for mounting frames on the frame, 11 frame (plywood with a thickness of 10 to 12 mm), 12 — longitudinal redan (foam stamps SS, preferovany strips of glass), 13 — deck stringer (rail 15X20 mm), 14 — transom (plywood 25 mm thick).
 
Work should start with the manufacture of the frames. They are cut in accordance with theoretical drawing of 10…12 mm plywood or collected from the wooden boards of the same thickness, which are joined vpoldereva in the area are scarce and are fixed with wooden studs and epoxy glue.
 
The most affordable and high quality method of Assembly of the frame is the simplest slipway the keel up. The frame is a frame with dimensions 500×3250 mm, collected from the boards section 20×150…200 mm. frames are attached To the temporal plates; they are mounted on the frame with a step equal to the length of spacey. During this operation pay attention to the location Sergei-line.
 
Made life-size template of the two or three strips wikiepedia keel beams. It is installed on the cross-set and fit with the frames on the short stacks. After adjustment, the “quiet of the main frame and check for compliance with the theoretical drawing in the frames etched Reiki bilge stringers n fenders bars. The required width of the zygomatic Sprayhood is provided by adding to the stringer in the right place strips of foam.
The location of the stringer are amplified by short stacks, which are fixed with epoxy glue and small nails. After drying of the joints with the rails removed Malki. This operation is performed by a small plane-“the flea” by constantly monitoring the treatment site by applying a set of piece of plywood. At this stage of construction between the frames in the bow and stern portions are glued the foam blocks, and their surfaces shaped to form.
 
The covering kit is performed in several stages. Must begin with a preliminary preparation of the plywood strips with thickness 3…5 mm and a length in accordance with the length of the boat, and given the bend in the bow. As sales come in sheets with a length of only up to 2.5…3 m, the strip will have to do teams of several pieces. The most common method of connection “on a mustache”. Length zayavki 12…20 times its thickness guarantees high strength splicing. The abutting edges are processed together. To do this, two pieces of plywood to fit the “step” at the end of the bench so that the top edge was retreating from the edge of the bottom for the selected overlap. From “steps” along the upper sheet is measured the same distance and draw a line is the beginning of the bevel. The plywood is fixed with a couple of nails and clamps and prostragivajut sharp polufugankom the desired angle. Maintain the instrument at a slight angle to the edges to the wood veneer didn’t chip back, and took off.
 
When gluing it is important to ensure a secure hold of both pieces of skin. This can be done by affixing a few nails, protecting against bias and then clamped between two thick boards a couple of clamps. The middle connection part is pressed against the additional burden contributing to a more uniform pressure along the entire length of the joint.
 
Now, with the necessary blanks, proceed to their cutting work. Trouble for the inconsistencies of individual bands will be eliminated if you make a thick cardboard templates and training in place to fulfill them.
 
Plating begins with the installation of boards: plywood strip is fixed at the midship frame, and then tightened the clamps to the set and is fixed with screws to the frames, fender and scopulosa stringer. Before that the details of the set are lubricated with waterproof glue. When the glue dries, the clamps are removed and the exposed edges of the plywood removed. Also removed the Malka and the keel beam, then install the bottom strip. They should be cut with a small allowance for Malka in place of a joint with the zygomatic stringer. The order of fixing of the bottoms similar to the installation of the boards. The base of the housing defining its form, finish, and after drying it can be removed from the pile and flip.
 
The coamings of the cockpit represent a space-a decorative element made of foam. This creates an additional guarantee of security and buoyancy of the vessel, completely filled with water. Processing of the foam is rough with a knife and a plane, and then completely, a large skin. The form of the sections is controlled by cardboard templates. In the middle part of the vessel, the coamings are amplified plywood planirali attached to the epoxy glue to the foam and long studs to the fender.
 
Now we have to prepare for the next stage — pasting the fiberglass that will give a “prefabricated” strength, stiffness and durability. You’ll need: a reinforcing material (glass), binder (polyester or epoxy) and special tool (a sharp knife and scissors with long blades for cutting; mechanical brushes and spatulas for application of the resin; cushion for stiching and enameled container for the preparation of the binder).
 
The strength of the laminated hull of boat will be determined by the thickness of the fiberglass coating. And since there are many grades of fiberglass with different type of weave and thickness, to save materials and reduce the complexity of the optimal scheme pasting the following: the inner layer fabric of satin weave brand T-11-DHW-9, then two layers of resin impregnated fabric or stalloreggi TR-056-DHW-9 or TR-07-DHW-9; again cushioning sing of satin fabric, two layers of burlap; a layer of satin fabric and last the finishing layer of thin fiberglass plain weave — fiberglass SE-01 for folding the rough texture of the previous layers and leveling the surface. Such a “sandwich” provides getting plastic coating thickness of about 5 mm.
 
Preparing binder directly before pasting in the amount calculated by no more than 2 hours of work. By this time plywood case needs to be prepared: sanded all the bumps and rough edges, rounded edges, cleaning off the smudges of glue.
 
Work on pasting should be carried out outdoors at temperatures below 18° C.
 
Glued the body stripes of the fabric. The overlap of the bands of one layer is performed in the area are stingy for the amount of 10…70 mm. areas exposed to abrasion and impact (keel, stem, school), are enhanced by additional strips of fabric with a width of 80 to 120 mm. Below the edges of various layers of fabric were invisible on the finished product, the extreme longitudinal threads of them pulled out.
 
Fig. 3. Theoretical drawing of the hull lines of the boats.
Fig. 3. Theoretical drawing of the hull lines of the boats.
 
Table of ordinates of a theoretical drawing.

Table of ordinates of a theoretical drawing.

 
Superimposing the layers of fabric and primativa their roller, it is necessary to closely follow the surface and to remove from the cloth the air bubbles by piercing it with a thin tongue and petrovina brush. The more carefully you performed this work, the cleaner will surface. Unpleasant feature of bubbles is the possibility of the outer layer through 1…2 hours after stickers as a result of internal reactions during polymerization.
 
Drying continues for at least two days at a temperature of 20…30° C. followed by Vykurovanie surface of the bottom and sides. In its place is installed the longitudinal planing steps, the body is primed and after a three-day drying is coated with enamel of desired color. Fit the rack inside the soles, and all wooden parts are impregnated with hot linseed oil.
 
The boat is equipped with standard, commercially available sporting goods systems of remote control of gas and reverse direction. You can make them with their hands (for example, using the description in the “M-K” No. 4, 1974). It is very useful to provide the motor control devices type of industrial, DLM-1, which is a tachometer and a temperature sensor, or the vehicle — with tachometer and speed indicator. Feed devices from a motorcycle battery or battery pack, placed in a sealed compartment of the control Cabinet. It’s supplied with a warning light.
 
Bow and stern rails are made of pipe 25…20 mm. Best material — stainless steel.
 
Sealed trunk under the seat are made of plywood with thickness 8…12 mm in the form of boxes with careful gluing the joints. The lids of these compartments that serve well as bases of the seats, sealed with rubber gaskets and are equipped with latches gramophone type. The seat cushions are typed sheet of polyethylene foam with thickness of 5…10 mm. a material having elastic properties, does not absorb moisture, which allows its use without additional protection.
 
On the control panel fixed glass, protected from wind and spray. It is cut out of Plexiglas with a thickness of 4 mm.
Ducks, mooring eyes and other sensible things that are used by Motorboats to have no differences exist in the use of vodnomotornikov.
 
In conclusion, I want to warn Amateur designers about the need to gently handle fabrics and epoxy resins. Work must wear rubber gloves and a respirator.
 
Learn more about Amateur shipbuilding can be found in the books:
 
1. Du Plessis X. small ships made of fiberglass. Equipment, maintenance, repair. Per. from English. L., “Shipbuilding”, 1978.
 
2. Kurbatov D. A. 15 designs for Amateur construction. 3-e Izd. L., “Shipbuilding”, 1985.
 

The main technical characteristics of the boats of the “Version 2”

 

Maximum length, mm: 4500

 

Maximum width, mm: 1658

 

Width at the cheekbone of the transom, mm: 1300

 

Board height, mm: 670

 

Weight, kg: 130

 

Power PM HP: 12-30

 

The maximum speed with the PM “Whirlwind” (30 HP), km/h: up to 50

 
P. IVANOV, Stupino, Moscow region

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