For short walks or trips on the water, a catamaran has a number of advantages over a boat or kayak. This means ease of disembarking and landing, reliability, greater stability and maneuverability, as well as increased cross-country ability in various rapids areas.
Also this remedy movement on water also has disadvantages, for example, increased windage of the hull and low speed when moving with oars. But these disadvantages are compensated by the advantages of the catamaran.
There are many designs of catamarans, in the manufacture of which they use available materials. With help detailed description and drawings, anyone can assemble the model they need with their own hands and at virtually no cost.
The catamaran is a vessel that is easy to operate and manufacture, versatile in use and viable in extreme situations. According to the type of movement, these vessels can be rowing, sailing and motor, as well as mixed designs. These devices consist of a frame and floats. The frame is made of a number of longitudinal elements, and the floats are made of an airtight internal cylinder. Next we will tell you how to make a catamaran with your own hands.
The floats of this vessel have a certain chamber structure, that is, an outer shell, which provides strength and an internal chamber, which is responsible for tightness. This function simplifies the manufacture of this model and increases its reliability. The contours on the floats help achieve low water resistance when moving. The frame is constructed of duralumin tubes with bolted fastenings using shaped nuts.
The catamaran is equipped with a steering wheel to facilitate control and relaxation. Also similar design provides for the presence of sailing weapons. Almost all components are made independently, you just need to not a large number of turning works.
The cost of this product is low. A sailing catamaran is used on rapids and flat rivers and lakes. When the water is calm, speed and overcoming rapids are ensured.
Floats
There are two of them and each looks like an air-filled hollow and round structure in cross section. The floats have practically no cylindrical sections and differ in bow and stern sections. The large ratio of surface to underwater volumes in the stern and bow parts of the floats contributes to excellent surfability on waves.
The float consists of an internal chamber and outer shell, which is fifteen percent smaller than the camera. This factor is necessary, as it contributes to the tense state of the camera and ensures its safety. Making cameras is a major operation and takes a lot of time. Part made from synthetic materials, is considered the most durable, and of the rubberized ones, the cheapest.
Uncover
If the camera cannot be cut out from whole piece material, then the panel is glued together from pieces with an overlap. The seam width must be at least three centimeters and additional fabric strips must be glued in their place. During assembly, the back of the chamber, which looks like a sleeve, is twisted and tied with a rubber band.
The sleeve design allows for repair and drying. Also, a special valve designed for a rubber boat must be glued into the chamber in front of the bow rowers. With its help, you can pump up the floats on the go if necessary.
The bottom is also cut out from a single piece of fabric or from separate panels. Next, the lower and upper shell parts are stitched from the limbs to the middle. These parts should be cut very carefully, to the nearest millimeter, to ensure the correct shape and avoid wrinkles on the float.
Bridge
This part is made from a set of aluminum tubes of various diameters, fastened with studs and bolts. All stringers consist of two components connected by a sleeve, which is attached with glue to the stern part and secured with a pin. The ends of the stringers are secured with plugs made of any materials and secured with shaped nuts.
Deck
This part has the appearance of a rectangular panel made of a dense type of nylon. Its dimensions depend on the assembled frame. Along the perimeter it is necessary to tuck the edges of the panel thirty millimeters and stitch it. Then you should install the grommets designed to secure the bridge and deck. Lacing must be done from the middle of the float to the limb.
Steering wheel
This part of the catamaran has the form of a feather made of fiberglass sheet two millimeters thick, which later bifurcates and folds together. Both halves need to be attached to the back and front edges using holes and copper wire and screws. Then all the edges must be filled in turn epoxy resin and cover with plasticine.
Wire should be used if necessary. After polymerization is complete, the wire and plasticine must be removed with a knife and the edge cleaned.
The steering wheel should be hung on the bracket using homemade hinges.
Oars
To make oars you need dur aluminum pipes, to which the roll, flattened by heating, is attached with four bolts or rivets.
Sailing weapons
This auxiliary weapon is ineffective and therefore rarely used, but is provided on this type of catamaran.
Motor catamaran
In production this type floating craft using a moped. To do this, it is enough to place the land vehicle on floats fastened with cross beams and fix the car on them.
The cases of this assembly are made of four-millimeter hardboard. After bending the workpiece, you need to drill holes at a distance of fifty millimeters. Then you should sew the hull with copper wire and glue a transom board with two frames there. Then the joints should be glued and the wire removed after drying. After removing the wire, the seams must be glued with glue and secured with fabric strips in three layers.
Fiberglass should be glued into the hull, the deck should be made of hardboard and attached to the hull using epoxy glue and copper wire. The inside of the body must be covered parquet varnish, and carefully cover the outside with fiberglass. Then the pine bars must be used as cross-section beams and attached epoxy glue and frame.
At the ends of the housings, it is necessary to secure bearings curved independently from three-millimeter steel strips using clamps. The maneuverability of this motor catamaran is ensured thanks to the rudder feathers. They are cut out of twelve-millimeter plywood and hinged at the ends using homemade hinges.
Next, you need to remove the wheels from the moped and fix it using the pin axes in the rear and front attachment points and replace the chain with a longer one so that you can throw it through the engine located on the paddle wheel.
In the design of your catamaran you can use either Gas engine, For example .
Inflatable catamaran
This type of catamaran is very light and takes up very little space when folded.You can swim on it in pairs and there is even room for luggage.
If you wish, you can easily install a small sail here, which brings little benefit, but still worth a try.
This vehicle, of course, is not suitable for serious hikes, but it’s just right for a boat trip on a weekend. Its design is very simple and to assemble this catamaran it is required: two inflatable floats in fabric covers, a U-shaped tubular frame and fabric seats.
The floats are glued from pharmaceutical durable oilcloth, the surface of which is covered with rubber glue and carefully powdered with silver powder.
Fabric covers help preserve the floats and protect them from sun rays. For the manufacture of the frame frame and seat bases, aluminum pipes with a diameter of twenty and twenty-five centimeters are used. The oars can be used for kayaking.
And on a deep river, and a small lake, and on a pond, a homemade catamaran will become not only fun, but also useful device. You can sunbathe on it, jump into the water from it, because it is almost impossible to turn it over. You can use your homemade catamaran to transport small loads, and also sail to inspect the fish cages. If you create a flotilla of such vessels, then it is quite possible to organize small competitions in speed or figure driving; they will also be an excellent means for making a small tourist trip.
What are we dealing with?
In order to assemble a catamaran with your own hands, you do not need any special materials - they are all available and very easy to process. If you don't take into account metal elements, then you will need ZMM plywood and slats with a section of 15-25 and 25 * 25 millimeters and a length of 3 meters. This is the main advantage of the resulting raft, as well as its feature. It is best to use If this does not turn out to be the case, then it is better to purchase birch, however, even in its absence, it is permissible to use spruce or aspen.
If you seriously decide to make a catamaran with your own hands, then the choice of plywood is very important stage, because the durability of your watercraft will depend on it. Naturally, it is also important to show diligence in terms of careful finishing of individual parts, as well as their connections. The plywood should be soaked while heated. It is best applied on a hot sunny day using a wide brush. Heating of drying oil should be done exclusively in a water bath using a wide bowl of boiling water. Of course, it is important to remember to be careful, because a burn from a hot substance is quite painful. You can complete the impregnation operation after the drying oil stops being absorbed into the wood. Typically, application is carried out two to three times with intervals of several hours.
Structural elements
So, when understanding the question of how to make a catamaran, it is worth considering everything in order. The raft's pontoons are made of slats and plywood. It’s worth starting with the frames. To do this, you need to cut 12 blanks from plywood, the dimensions of which are 320 * 320 millimeters, knock them down with three or four nails, and then process everything together along the contour. Next you need to make slots for the slats. The slats are square, but the slots should be 20-25 millimeters in size. The remaining 5 millimeters in the slats are equipped with grooves. It is best to lay all six slats side by side, secure them, and then use a saw to make cuts in all of them at the same time. Since they will turn out to be a little deeper at the edges, it is worth leveling the average depth by shifting the boards several times during the work process.
Before forming grooves, it is worth checking the dimensions of the plywood sheets. If we are talking about a number less than 1500 millimeters, then it is necessary to adjust the installation location of the cross member 7 and frame 5 accordingly. Six frames require pieces of slats to be attached to them from the sides and top, and a piece of board should be attached to the bottom. Everything must be done as firmly as possible; it is better to use screws or screws for this, because nails will be driven into the slats, the task of which will be to hold the plywood.
Vessel assembly
If you decide to make a catamaran with your own hands, you will need to prepare several slats. The length of four of them should be three meters each, two should be 1.9 meters each, you will also need four segments of 570-600 millimeters each, after which you can proceed to further work. It is clear that it is worth placing a pair of upper slats below, which will allow the frames to sit firmly in their place. You can immediately fasten a couple of cross members with screws, and then lay the keel rail, screwing it to frames 1, 5 and 6. Next, you can turn the catamaran frame on its side to secure the upper rails to the same frames.
You will need a board 50 millimeters thick to cut out the stern and bow bosses, and here it is important to take into account that their shape should be cone-shaped. And then they need to be inserted into place, having first tied the top slats with wire. On the bow and stern overhangs, the keel rail is made from several scraps.
Sheathing
Now it's time for this important element like cladding. To make a catamaran with your own hands, you need to cut out several elements. The width of the central part is 823 millimeters, cutting it out is not difficult. It is easy to bend it to the shape of the frame, since it has already been impregnated with drying oil. But it’s important not to rush here. To make the work easier, you need to tighten the workpieces with wire, ropes or something else, and then leave them in this position for several days. It is worth noting that plywood should be fastened with nails, but it is first necessary to coat the fastening points with thick paint on the slats, frames, and also in the corresponding places of the plywood. Most diligently you should coat the joints on the frames.
Continued assembly
If you are making a catamaran with your own hands, the drawings have already been carefully thought out, then next, using a cardboard template, you should determine the shape of the blanks for the overhangs. This should look like a cone. They are installed similarly to the previous elements. The plugs should only be attached to the paint. Their contours should be specified based on the finished skin. The 9-11 slats should be nailed to the paint, like all other parts. Next, you can cut out the deck by tracing the outline of the almost finished pontoon. Once the deck is nailed down, the pontoons can be completed. During the installation process, you should not skimp on paint.
Deck
The easiest way is to make it from the same plywood as the other parts. For strength from below and above, it is worth nailing the slats in increments of 300-350 millimeters. If you don't trust the strength of plywood, you can lay it in two layers, placing one on top of the other. Where the pedals will be installed, it is necessary to adjust the rack pitch accordingly. Naturally, speaking about how to make a catamaran, it is worth noting that it is appropriate to use other materials for the deck, for example, thin boards that will be nailed so that there is a meter wide space between the pontoons.
Working part
If you decide to make a catamaran with your own hands, then the propeller drive should be made from parts from a bicycle. You will need to use a pair of frames with carriage assemblies and pedals. The cut ends of the frames should be flattened and then attached to the deck rail using screws. Spacer bushings, the length of which is 120-130 millimeters, must be installed between the pedals, and the pedals themselves must be connected by long common pins.
Equipped with paddle wheels, which are made from bicycle wheels. The blades should be cut out of rubber, the thickness of which is 4-6 millimeters, and then tied with wire to the knitting needles. One wheel should be equipped with five to six blades.
Functional area
The seat is made of plywood and slats, the cross-section of which is 25*25 millimeters. The seat is secured to the deck after the propeller drive is installed - so that the slats below are not accessible to the tensioned chain. It is best to fasten the elements with screws, since it is quite possible that the position will need to be adjusted.
So, you make a catamaran, the photo of which you liked. Next you should make steering, this will also require slats and plywood. The dimensions of the handlebars are 200*320 millimeters. A plywood bracket with sides of 200*200 millimeters should be nailed to the right one using slats, and then a rod should be sent from it to the lever, which should be installed on the side, in the immediate vicinity of the seat. The axes of the longitudinal and transverse rods can serve as thick nails, for which holes must be drilled with a drill, otherwise the rods may burst.
Final stage
There should not be any particular difficulties in assembling the catamaran. The pontoons must be installed on a level place, after which you can lay a deck on them, mark the installation locations for bicycle frames with pedals, a rowing drive and a seat. But there is no need to rush to secure all these knots. All wooden parts of the raft must be painted in three layers oil paint. Since each layer takes a day or two to dry, you will need a week for this operation.
When painting is completed, all components should be installed in place. The seat is mounted at the end. To tie the catamaran to the pier and to ensure ease of carrying it, it is worth screwing 4-6 door handles on its sides.
PVC – modern material, having mass positive qualities. It is quite inexpensive, lightweight, strong, durable, resistant to different climatic conditions and environments. In addition, plastic pipes are easily and quickly connected, ensuring absolute tightness of the joints.
Thanks to this, the use plastic pipes has gained wide popularity not only in the installation of water pipelines and sewer systems. Of them " craftsmen“They make a lot of useful “things” with their own hands, from racks and drinking bowls to sleighs and watercraft.
In this article we will tell you how you can quickly and inexpensively make a catamaran from plastic (with your own hands.
Contents of the article
Why a catamaran?
There are a lot of options for watercraft, as well as their purposes. For those who live near bodies of water, and especially for those for whom overcoming a water obstacle is a vital necessity, a catamaran is ideal. This type of vessel has many advantages. in front of kayaks, boats or yachts.
- To make catamarans from plastic pipes, a minimum amount of material is required. In addition, remnants from the recent installation of a sewer or water supply system may well be used;
- the catamaran is light in weight, so it does not cause problems in terms of transportation;
- due to the design features - two cylinders connected by a deck, such a craft has high seaworthiness, strength, reliability and sufficient speed;
- possibility of accommodation required quantity seating areas;
- Any type of engine can be installed on a catamaran.
What does a catamaran consist of?
The catamaran has a large number of design features compared to other watercraft.
That is why you need to know its components in detail, before starting drawings and installation work.
- The first, and most important, part of the catamaran is the floats. These are two chamber structures located on the sides of the craft. Their immediate task- keep the ship afloat. Cylinders can be made from different materials, limiting the outer perimeter of the float. To do this, use the film from which inflatable cylinders, foam plastic or PVC pipes are made.
- Connecting frame. It can be made of any materials, from the same plastic pipes to wood or metal. The lighter the catamaran frame, the smaller the floats can be.
- Deck. This part is created to accommodate passengers, luggage and other things that will be transported by water.
- Steering wheel. The function of the rudder of any watercraft is performed by an underwater blade, which for movement is directly installed parallel to the movement, and for turning it is bent in one direction or another using a rotary handle brought to the deck.
- Oars, pedals, motor or any other device that propels the catamaran.
Vessel size calculation
The diameter of the floats, as well as the width and length of the vessel, depend primarily on where and how it will be used. The larger the crew expected and the more cargo will be transported, the larger the size of the craft and the diameter of the floats should be.
The carrying capacity of a vessel can be increased by increasing the cross-section of the cylinders or their length. Decisive factor in this situation is the volume of air inside the cylinders.
Optimal parameters for calculating floats, Based on the crew and carrying capacity the following:
- a single-seat catamaran should have a length of 2-3 meters with a cylinder cross-section of 0.3-0.4 meters;
- for the manufacture of a two-seater vessel, cylinders with a length of 3.5-4 meters and a diameter of 0.45-0.5 meters are used;
- three and four-seater watercraft have a length of up to 6 meters with a float diameter of 0.5-0.6 meters.
It is not recommended to make a catamaran longer than 6 meters, since it will almost completely lose its maneuverability. Although, if you are going to sail mainly in a straight line, there are no restrictions on the size of such a “ship”.
The larger the size of the vessel, the greater its maneuverability and stability, but the less maneuverability. This applies to both its length and width.
The width of a catamaran is primarily determined by its purpose and method of propulsion. If you are making a catamaran for river rafting using the kayak principle, its width should not exceed 1.2 meters. Otherwise, capturing water with oars becomes impossible. If it is planned to board rowers on cylinders, the width of the vessel can be increased to 2 meters.
If the catamaran is a fishing or pleasure boat and it is planned to be equipped with a sail, motor or blades with pedals, its width can be increased further.
The width of the catamaran should be at least one and a half times less than its length.
Manufacturing procedure
To make a catamaran with your own hands, you need to decide on its purpose and, based on from this, calculate the dimensions. We will consider two options for the vessel: the simplest single-seater and a tourist raft based on a catamaran.
Single catamaran
We start making the simplest single-seat catamaran by making floats. We take two pipes of the same diameter and length (based on the calculations given above, we will need plastic pipes for external sewerage with a diameter of 0.4 meters and a length of 2 meters). We fix it on one side of both pipes. This will be the back of the catamaran.
The front part needs to be raised for greater cross-country ability and maneuverability. To do this, we use two plastic elbows with a 120 degree bend. We attach them to the other end of the pipes and also close them with plugs.
When assembling cylinders Special attention Pay attention to the tightness of the joints. The slightest depressurization can lead to the sinking of a ship on the water.
The floats are ready. You can start assembling.
To connect the floats into one “whole” catamaran, you can use anything. Plastic pipes of small diameter are suitable, wooden blocks, metal corners And so on.
- From the material you choose, we make crossbars 1.2 meters wide.
- We install the cylinders strictly parallel to each other so that the bends point up and in the same direction.
- We fix the transverse strips on top of the cylinders. For fastening, both clamps and self-tapping screws can be used, with which the transverse strips can be screwed to the floats for greater strength.
- On cross beams We set up any comfortable seat, take the oars in our hands and row where we want.
Do-it-yourself single-seat catamaran made of plastic pipes (video)
Tourist raft
The basic principles of making these two watercraft with your own hands are not particularly different. The only difference is that the pleasure raft will obviously not be designed for one person. And it’s even better if it can also accommodate cargo in the form of provisions, a sun umbrella, clothes, dishes, and other things.
- We make floats using the above method. But you should take a pipe with a diameter of 500-600 mm and a length of 6 meters. This will make it possible to create a stable and passable vessel on which you can take a nap without worrying about the life of the crew.
- We make a strong frame measuring 6*2 meters. Since the frame not only must hold the cylinders in correct position, but also serve as a platform for the deck; it is better to make it from metal corners.
- Clamps are tightened onto the pipes from which the floats are made, to which, in turn, the frame is attached using bolts.
- Flooring is made from boards on the frame.
This design allows you to install any driving device on the catamaran, from blades driven by pedals to gasoline engines.
In addition, such a platform allows you to fully sunbathe in the sun, catch fish, and, in general, have a fun and fruitful relaxation in a narrow circle of best friends.
Several videos show how the master, the Author of the channel “Alexander Sedoy,” conceived and implemented the idea of building a high-quality catamaran from polystyrene with his own hands. The task was set, the swimming device should be:
1. Unsinkable.
2. Indestructible.
Z. Cannot turn over.
4. Foldable, with the ability to be transported on the trunk
small passenger car.
5. Decent dimensions for comfortable swimming.
b. The draft is half that of a kayak.
7. Lightweight, each part should not be heavier than 20 kg.
8. Get ready quickly and easily.
9. Roomy.
10. Lifting capacity, not less than 700 kg.
11. Autonomous, several sleeping places, place for fishing and barbecue.
12. Possibility of installing a motor up to 10 p.s. on a catamaran.
Choice of float material.
First I bought penoplex “Comfort”. Width 100 millimeters. I bought a package. Weight 18.7 kilograms. Cubic capacity 0.28.
Ultimately, the master settled on URSA. Noble material, pleasant, comfortable to work with. Thickness 50 millimeters. The weight turned out to be 15.7 kilograms. Cubic capacity 0.3. The cost of one package is 1200 rubles. The weight of 1 leaf of ursa is 1.1 kilograms. Why 50? I read that, of course, gluing a weave is easier, 2 times faster, but the more intermediate layers - stiffeners, the stronger design catamaran Therefore, I settled on a sheet width of 50 mm.
The purpose of the catamaran is to sail together with the kayaks. Therefore, the draft should be no more than 3-5 centimeters. The kayak has up to 15 - 17 centimeters. Maximum comfort for fishing. The structure must be completely dismountable, each part no more than 2 meters long. As easy as possible.
First, let's prepare a device for cutting edges. Nichrome thread will be used. At the same time, the walls are baked, they become smooth. Extra rigidity and moisture resistance will not hurt. You will need exactly three packages of materials. 50 x 125 x 600.
The most important thing is that the spiral is securely fastened, otherwise the size will float away. If the spiral is held clearly all the time, all the details will be exactly the same. Abruptly occurs using a 220 to 5 volt transformer smooth adjustment“fading of light.” The device cuts the material like butter, but it is important that the thread does not get red hot. The voltage supplied is 1.5 and 2 volts. With manual feeding, ideal boundaries are unlikely to be achieved. But this is not required. The work takes place without dust, noise, quite smoothly and neatly. URSA material must be fed smoothly.
The master showed how the cuts differ nichrome thread and factory.
Now cut it exactly in half without stamps. If the spiral does not heat up red-hot, the material does not give off any odor. The device works great. Why is the cut done in half? Because I decided to make it not transverse, but longitudinal. Thanks to this there is no waste. Except for the edge. The edge is cut to length on both sides. The side edge is cut from only 12 sheets out of 24. Another advantage: no stamps are needed. It became possible to increase the length of the catamaran by 1 meter. I had to buy three more sheets, so I ended up with three packs and four sheets. Total 24 sheets. Additional 100 kilograms displacement. Reducing draft and increasing speed. Simplification of product installation. Ideally smooth and even surface. Saves putty and glue several times. Reducing work by an order of magnitude. Much better in strength than a cross set. Longitudinal set in a checkerboard pattern.
The second part of the video is about the construction of a homemade catamaran. The float panels are joined together on each side. The blanks are treated with waterproof products.
Part 3 is about building a catamaran from polystyrene.
Part 4
We are waiting for the final 5th part with tests of a homemade catamaran on a pond, which the author will post, presumably, in the spring or summer.
Inflatable catamarans differ quite greatly in hull type. Today, planing modifications are considered the most common. Additionally, displacement configurations are available. Assembling a catamaran on your own is quite difficult. However, if you pick up everything necessary materials, then this can be done. It is also important to adhere closely to the drawings during assembly. To study this issue in detail, it is best to familiarize yourself with the most interesting models catamarans that exist.
Modification with rowlock
To assemble an inflatable rowlock (the drawings are shown below), first of all, two floats are prepared. They must be at least 3.5 meters in length. The oarlock itself is designed to hold the mast. After securing the floats, you can proceed to the steering column.
For this, a pipe with a diameter of about 3.5 cm is most often used. Next, a stock is installed on the float. To secure it properly, you need to use beams. Next you need to install the stringer. The steering column is mounted only after the tiller. It is chosen most often rectangular shape. The locker should be installed with great tension. For the mast, a pipe with a diameter of at least 5.5 cm is taken. The sail is selected in in this case separately. In the end, all that remains is to secure the tensioners.
Model with mooring beam
To assemble an inflatable catamaran with a mooring beam with your own hands, floats are installed as standard. The distance between them must be at least 1.2 meters. Only after this will it be possible to install the stock. In this case, beams must be selected with stops. On next stage it is important to prepare the beam. It must be installed along the float.
The locker in this case should be located above the boom. After this, the catamaran deck itself is knocked down. Next, you can install the mast. For this purpose, a corresponding hole is made on the beam. Direct fastening must take place with the participation of tensioners. Then you need to install a tiller to control the catamaran. At the end of the work, all that remains is to tension the sail.
Catamaran with ropes
The model is assembled with a stretcher (drawings of the inflatable catamaran are shown below) quite simply. In this case, work must begin with calculations of the length of the floats. As a rule, they are prepared with a diameter of about 0.5 meters. After this, you can begin installing the stringer. For this purpose, it is first necessary to install the stock. As a rule, it is used in a rectangular shape. Next, it is important to immediately attach the stand to it.
A tiller can also be attached for control. The next step is to knock down the deck on the catamaran. For this purpose, boards 1.2 meters long are suitable. The locker is installed only after the boom. The guy wire should be mounted directly on the swivel. To do this, you need to prepare four screws. At the end of the work, the mast is installed. You also need to take care of the tensioners.
Model with centerboard (PVC)
Inflatable PVC (polyvinyl chloride) catamarans with centerboards are quite common these days. In this case, it is more appropriate to start work by installing the beam. After this, it will be possible to fix two floats. Beams for catamarans are most often wooden. However, they can also be made from aluminum plate.
In this case, stringers must be selected with a length of at least 3 meters, but much in this situation depends on the width of the floats. The next step is to install the stand. The centerboard is attached directly to it. It is necessary to control the catamaran. You can change its position thanks to the tiller. It is installed on the stand using screws. At this stage it is very important to securely fix the support.
Reviews of catamarans with a locker
Homemade inflatable catamaran of this type Today it is quite rare. Underarms are designed to control the model. If you believe the reviews, when assembling it is initially important to secure the floats. Regular ones are suitable for this. wooden boards. In this case, you can use a wooden baller.
The minimum length of the stringer should be about 2.5 m. According to experts, beams on a catamaran are installed only after the rack. The tiller for the model cannot be selected big size. At this stage it is important to securely fix the tensioner. This can be done using wrench. Then the undercoat is installed. You can secure it to the stand using screws. However, it should not block the swivel.
Modification with longitudinal beams
With longitudinal beams, the inflatable catamaran (photo shown below) is very durable. In order to assemble the model, you need to prepare two floats. They must be at least 4.5 meters long. After this, the stringer itself is assembled. You can weld it yourself using a pipe with a diameter of 3 cm. After this, it will be possible to install a stand. For this, boards should be selected about 1.3 meters long.
Catamaran tensioners are best suited steel type. The beams at this stage must be laid very carefully. Their front part should face towards the deck. To fix them, many experts recommend using screws. After securing them, all that remains is to install the hook with the mast.
Reviews of models with transverse beams
WITH cross beams Inflatable catamaran reviews are mostly positive. Assembling the model must begin with the preparation of two floats. If you believe the reviews, they must be at least 35 cm in diameter. The next step is to secure the stock. Beams in this case are used only with supports. Their thickness should be at least 2.2 mm. After this, the stringer is directly fixed. It must be at least 2.5 mm in diameter. The next step is to install a stand on the catamaran. According to experts, its minimum height should be 1.2 meters.
To make it yourself, you need to use metal pipe with a diameter of 2.3 cm. After this, a steel locker is attached to the catamaran. It is important to use screws to secure it. They will fit with the M6 marking. In this situation, a small tiller can be used. Next, all that remains is to fix the boom. For this purpose, first of all, the tension is installed, and then the swivel is fixed. After this, you can mount the mast directly. The sail must be selected separately for the catamaran. When assembling tensioners, many experts recommend using small widths.
Catamaran with winding seal
Inflatable catamarans of this type are considered quite common today. The floats in this case are fixed rigidly. It is necessary to begin assembling the model by marking the future deck. After this, the float is fixed. In this situation, it is important to select a solid type baller. Its maximum thickness should be 2.3 mm. Many experts recommend using aluminum beams. They have fairly little wear. It should also be taken into account that stringers are selected based on the width of the floats.
The tiller, in turn, should be 1.2 meters long. Otherwise, driving the catamaran will be uncomfortable. The tiller stand must be made from steel pipe. It should be at least 2.3 cm in diameter. The boom in this situation is aluminum. Winding the seal must begin from the tiller side. At the location of the rack it will have to be interrupted. In this case, it is important to fix the seal using a tensioner. Then the swivel is attached. Next, the winding needs to be extended to the bow.
Assembling the device with a stopper
Inflatable catamarans with a stopper are not easy to fold. The problem in this case is finding the right baller. Its minimum thickness must be 2.3 mm. You can make it yourself from a steel plate. To do this you will have to use welding inverter. First of all, a rectangular sheet is cut out. Next you need to weld two supports. Their height should be no more than 3.4 cm.
All this is necessary in order to be securely attached to the boom. Next, the stringer is folded. It is important to use only aluminum pipe for this. In order to secure the stopper, you need to prepare four screws in advance. First of all, the holes on the stringer are faked. The first of them should be located at a distance of 2 cm from the front edge. The remaining three holes for the stopper are made at the rear. Next, it is important to secure the stopper using tensioners.
Models with duralumin sheets
To assemble inflatable catamarans of this type, you need to prepare four sheets. However, first of all, experts advise taking measurements of the floats. Their minimum length must be 3.5 meters. After this, the deck is fixed. It's quite easy to make from boards. In this case, their minimum length must be 1.2 meters. After this, you can immediately install the stand. At this stage you will have to use a welding inverter. The support should be located directly above the stand.
The sheets are laid on the tiller side. In order to prepare the deck for this, it is important to install the swivel right away. Many experts recommend using steel tensioners. The sheets can be secured using screws marked M6. Additionally, you need to install clamping rings for better fixation. After installing the sheets, it is necessary to begin manufacturing the mast. Then all that remains is to lock the tiller to control the model.