CATAMARAN In my experience, Amateur-built craft it so happened that this small pleasure catamaran “Fish” — not the first and it built it even later than the great tourist nautical quadruple (also sailing).

Something small large ship repeats — for example, dvuhkonusnyh (or rather, double) a cutter scheme, a set of power elements, the material used. However, many of the same type (single-purpose) nodes and even the details are different, except, of course, standardized purchased products.

Catamaran “Fish” is not only small in size but simple in design, and able to build a beginner shipwright.

But even a relatively small size do not allow to store it in internavigational period, assembled, not to mention the possibility of conveying to the “big water” at least for the trailer car, and especially in the construction of passenger vessels turned out that this small pleasure catamaran “Fish” — not the first and it built it even later than the great tourist nautical quadruple (also sailing).


CATAMARAN Something small large ship repeats — for example, dvuhkonusnyh (or rather, double) a cutter scheme, a set of power elements, the material used. However, many of the same type (single-purpose) nodes and even the details are different, except, of course, standardized purchased products.


Catamaran “Fish” is not only small in size but simple in design, and able to build a beginner shipwright.


But even a relatively small size do not allow to store it in internavigational period, assembled, not to mention the possibility of conveying to the “big water” at least for the trailer car, and especially in the passenger car of a train! Therefore, this catamaran is made collapsible.


Sailing rig of the vessel is simple, and management is available even to those who are just learning to sail.

From the description of the catamaran in advance I want to apologize from the professional sailors and shipbuilders of the names of some structural elements is not quite correct (or not quite match the classic version) But some beams and pillars, of which, indeed, is almost the entire power set of the ship, I can “confuse” not only beginners shipbuilders-lovers, but also professionals.

Walking a collapsible float catamaran


Walking collapsible float catamaran “Fish”:

1 — float (2 PCs),

2 — side of the forepeak;

3 — frame (4 CC),

4 — front cross beam,

5 — high beam below the deck-beams,

6 — mast

7 — sail-mainsail,

8 — standing rigging (shrouds),

9 — Spruit,

10 — geek

11 — the forestay;

12 — paddle,

13 — the back pocket of the float,

14 — the average pocket-drawstring float,

15 — the centerboard,

16 — steering wheel,

17 — the middle longitudinal beam carlings,

18 — rear beam below the deck-beams,

19 — additional hull bottom.

The buoyancy of the catamaran is provided by two inflatable, single-chamber float-balloon, shaped like a corncob. Miteleva the cross section of the float is approximately 2/3 its length from the nose


The length of the floats is about 4 m, and the largest diameter (at midsection)-420 mm., a size float was chosen according to the required displacement, provided that the waterline will pass through the median longitudinal line of the floats.

Theoretical drawing and the pattern canvases float


Theoretical drawing of the pattern canvases float:

a theoretical drawing

b — upper Polony shell

in — the lower blade shell (bottom part),

Mr. polato additional covering bottom part.

Material floats technical synthetic fabric Ferrari with a double-sided film coating, but other water – and airtight material. For example, my friend Andrey Chernikov, building such a catamaran made from the floats of the material used for advertising banners


Before the production of the floats was first performed theoretical drawing with cross-sections at equal intervals, Each float was assembled from two parts (can you say, half, if not to take into account the allowances for gluing on the pattern of one of them).

Gluing canvases shell float


Gluing canvases shell float:

and in a deflated condition,

b — in an inflated condition,

1 — top shell,

2 — the lower part of the shell,

3, the adhesive layer “Armono”,

4 — sticky plastic tape.

The layout of the pattern pieces were made on the smooth floor of the room. The cloth material was applied to the axial line (line of symmetry) and it was delayed in both sides of the segments is equal to a quarter of the circumference of the corresponding section of the float at a theoretical drawing. The ends of the lines were connected by a smooth curve line.


First, cut one part, superimposed on the cloth and then it is cut different, but with allowances 20 — 25 mm around the perimeter. In order for the material does not slip, the canvas was glued to the floor, and the pattern to the fabric with double sided sticky tape. These two patterns were cut the same workpiece for the second float.

A frame structure of a catamaran and unfastening mast


A frame structure of a catamaran and unfastening mast (pipe material—duralumin D16T); and a fore end; b — feed end:

1 — the forward part of the stringer (trumpet Ø45×1,5, 2 s ),

2 — the middle part of the stringer (trumpet Ø48×1,5, 2 PCs ),

3 — aft stringer (trumpet Ø45×1,5, 2 PCs),

4 — bow beam (pipe Ø48×1,5),

5 — the average podmazova beam-BIMS ( pipe Ø48×1,5),

6 — feed beam-BIMS (pipe Ø48×1,5),

7 — median longitudinal (steering) beam carlings (pipe Ø48×1,5),

8 — the upper knee of the mast (pipe Ø50×2),

9 — the average knee mast (pipe Ø50×2),

10 — lower knee of the mast ( pipe Ø50×2),

11 — Spruit,

12 is the upper clamp (stainless steel, sheet s2, 2 PCs),

13 — bottom clamp (stainless steel, sheet s2,2),

14 — bow front stem (pipe Ø22×1,5, 2 PCs),

15 — frame with strut (tube Ø22×1,5, 4 pieces),

16 — aft strut — sternpost (pipe Ø22×1,5, 2 PCs),

17 — Bush axis steering (pipe Ø22×1,5),

18 — upper guy (cable Ø4, 2 PCs),

19 bottom guy (cable, Ø4, 2 PCs ),

20 — pin lanyard cables (4 PCs ),

21 — us guys (cable Ø4, 4 units),

22 — the forestay (cable Ø4),

23 — the forestay lanyard,

24 — us the forestay (cable Ø4, 2 PCs),

25 — diagonal tie (cable Ø4, 2 PCs),

26 — lanyard diagonal ties (2 PCs ),

27 — a cross-tie (cable Ø4),

28 — lanyard crossties,

29 — tie stringers (cable Ø4, 4 units ),

30 — lanyard tie stringers( 4 pieces),

31 — brace-lever.

Before gluing parts allowances in the second storage and the appropriate shelf near the edges first thoroughly prepared with the relevant parties: a little clean fine sandpaper and wiped with acetone.


Glued the halves to float a simple joining of workpieces margins, the second on the first lap glue “Armono” on the following technology. After buttering the joined surfaces, the adhesive was given the chance to dry for 20 minutes at room temperature. After the joining edges are heated with a Hairdryer and rolled down with a roller.

Joining of the tribes of the mast (photo mast in a disassembled state)


Joining of knees of the mast (photo mast disassembled):

1 —the higher the knee,

2 — likes (special dural profile)

3 — connecting bushing (duralumin D16T, pipe Ø48×1,5),

4 — lower knee,

5 — mount likasa to the knee (screw M5 flat head screws, as required),

6 — mount likasa, elbows and bushings (screw M5 flat head screws),

7 — pin (screw M6)

Aft closed up in the last turn. And before that, inside the float was abandoned the lower part of the air valve Subsequently in the upper part of the float, amidships was glued additional circle of the same material, and the shell and the hole cut and the valve is mounted (connected by its lower and upper). For insurance (guarantee of integrity) around the perimeter of the seams were still glued sticky plastic film.

At the end of the float was inflated with air, and the seams were prokatyvalis on top of a soap solution and checked for leaks. In an inflated state to the float were glued pockets-drawstring for skipping ropes and pockets pouches for institutions of the ends of the stringers. But these operations were performed after fabrication of the power frame and the fit of the location of its elements on floats.

And from the bottom up to about the midsection was glued triangular long but not wide strip of the same material “Ferrari”, which serves as additional hull bottom.

Spruit mast


Spruit mast:

1 — mast (aluminum, pipe Ø50×2),

2 — spurs machi (aluminum),

3 — steps (special bol M10, stainless steel),

4 — washer (heel) (duralumin),

5 — podmazova beam — average beam below the deck-beams (made of anodized aluminum, pipe Ø80×2),

6 — clip-bugey (stainless steel, sheet s1),

7 — a branch pipe (stainless steel, sheet s1),

8 — front Spruit (dural tube Ø28×2),

9 — mounting bushing (aluminum),

10 — strut (nut M10, stainless steel),

11 — spruyt (aluminum),

12 — rope (stainless steel).

Power set of a catamaran is a lattice (or even truss) structure assembled of rigid longitudinal and transverse beams and connected in addition to cable ties.

The elements of the power set of a length of more than 2200 mm (these are the stringers and the mast) are made of composite segments of approximately equal lengths Is made for transport of catamaran unassembled in public transport, metro, train.

Pongout with brace

Sponsot with strut

The power set can be attributed to the mast, as she, along with elements of its fastening — rope (stainless steel) guys and forestay — also distributes the load between the longitudinal and transverse elements.


The longitudinal elements of the power set of the stringers. Their length is over 4 m So they made a composite. While their middle parts are made of pipes with a diameter of 48 mm and a wall thickness of 1.5 mm, and the end part of the pipe with a diameter of 45 mm. When assembling the end portions of the stringers are inserted into a median of approximately 200 mm.Spruit


The ends of each stringer embedded low sloping (downward) stand: the front stem, rear post Lower ends of the struts are tightened wires that are slightly arch arch stringers the tension of the ropes produced by the brace-lever, the lower end of which is pivotally connected with a rack-stem, and the top (after pulling the wires) fixed in the bracket on the stringer Additionally, the cables are stretched even lanyards Therefore, when the load on top of the stringers do not work in bending and compression, while transmitting part of the load on the wires (when mounting the catamaran ropes are passed to drawstring floats).




1 —mast

2 — mount bracket (M5 bolt, 2 PCs),

3 — bracket (bent steel channel, stainless steel, sheet s2),

4 — axis dry (bolt M8)

5 — biscuit (duralumin D16T),

6 — cheeks (stainless steel, sheet s2, 2 PCs),

7 — gik (D16T, pipe Ø30х1,5),

8 — show stopper (plastic, purchased the item, 2 pieces),

9 — roller (plastic, store-bought product),

10 — the axis of the roller (stainless steel, round 5),

11 — the plug (nylon),

12 — clip,

13 — boom-mainsheet (synthetic rope Ø8).

In the middle of each intersection to the stringers adjacent one of the ends of the cross beams below the deck — beams the two of Them, and they are made from the same pipe that the middle part of the stringer At this point all three elements are held together by one common bolt However, in the attachment there is another bolt, but it serves as a pin for the first Head he has a ring (eye-bolt) — for it clings carbine guy or mustache of the forestay . At the bottom under the nut with a washer on the bolt put the cable eyelet spider.

Top mast

The top of the mast.

In the power set there are two beams: one is transverse — front, and the other longitudinal — median under-deck (carlings). They are made from the same pipe that the end portions of the stringers, diameter 45×1,5 mm Front beam is attached to the stringers exactly the same as the beams. A longitudinal beam is attached to the beams and to the front podmazova — with the help of a special cage-bugey, and to the rear — bottom of a conventional bolt. To the rear end of this beam-carlings docked (T-shaped and vertically) section of pipe with a diameter of 22 mm it is the bushing the axis of the steering gear. But this element is not related to the frame structure.

Sail the Bermuda type


Sail Bermuda-type:

1 — the canvas sails (fabric “Yacht”),

2 — enhancing scarf,

3 — bottom part-laderman,

4 — enhancing scarf,

5 — front part,

6 — enhancing scarf head points corner

7 — rear part,

8 — laderman (5pcs),

9 — LVL (6 PCs),

10 — grommets (3 PCs),

11 — litres,

12 — straight seam,

13 — zigzag seam.

The whole grid of stringers and beams Besov relies on frames made in the form of trestles from the pipe diameter 22×1,5 mm. the Legs of the trestles strapped arcs, forming with the ends of the legs of the saddle, wherewith they fall on the floats. In special grooves in the ends of the legs infest the ropes, tightening the ends of the stringers.

The wheel

The wheel


Steering wheel:

1 — rudder,

2 — eyelet scarta,

3 — mount the tiller to the lining (dural area 25×25, 2 PCs),

4 — rumple (dural tube Ø30×1,5),

5 — axle steering (pin M10),

6 — bracket connection to the axle steering and cheeks,

7 — cheek (made of anodized aluminum, the sheet s3, 2 CG),

8 — roller scarta,

9 — axis universal joint,

10 — plate (stainless steel, sheet s2, 2),

11 extension cable (pipe Ø30×1,5),

12 — handle (rubber),

13 — spar pen

14 — the shell of the pen

15 — the axis of the rudder,

16 — bracket-clip video.

For fixing the relative position of the frames and grates from the bottom of the inner legs of each frame to the beams at a 45° angle mounted and secured guard — they don’t allow the frames to the wheels along with the floats to Podgoritsa.


The power set of floats (or floats to it) is attached in one of two ways. Both mounting and relatively free, since the lattice element is rigid and floats — elastic and can slightly change its shape.


By first connecting the floats with the power set through tightening the ropes stringers that are inserted in kuliski glued to the floats on the sides in the middle of it. A second connection through the pockets, also glued to the floats in the bow and stern and put on the ends of the stringers.


The mast of the catamaran is made of the same pipe as the beams and the Central part of the stringers, the diameter is 50×1,5mm Overall length of the mast — 6 m, so it is made of a composite of three pieces of pipe, 2 m each Joined segments-knee with the internal bushing is secured in one of the knees (bottom) one of the screws holding the knee of the mast likes. Next (higher) knee is put on the bushing, and only fixed it by cranking the stop-screw, screwed into the wall of the sleeve. And knee mast screw cut a matching groove. Based on the mast steps, fixed in the middle of the front beams. Steps, in turn, are backed along with podmazova the BIMS stand-spruston, raskreplennye with spider and rope extensions: two diagonal — longitudinal and transverse power elements (stringers and beams) in the places of their connections and another cross on the middle of the stringers. Height spruyt such that it is slightly (by 50 — 60 mm) does not reach the surface of calm water.


The mast raskreplennye on the elements of the power set of the front of the forestay, and on the sides—double guys. The upper end of the forestay attached to the mast about 2/3 of its height through the earring. The lower end forked and made a mustache. Each of us goes to the place of joining of the front beam with the stringer engages, and there is a carabiner for the bolt lug.


Both guys made bifurcated as above, so below. The upper ends of the whiskers attached to the mast’ one in the middle and the other at 2/3 of its height, the Lower ends of the mustache pinned on the sides of the joint bimsb to the stringers.


The rudder and centerboard — design similar. But I made them from various materials (though it is possible and from the same). The casing of the pen vykleili of fiberglass, and the centerboard sheathed by dural sheet with a thickness of 1 mm. the Force set both elements the same — one curved longitudinal spar with a strut in place of the fracture. The skin of the centerboard priklepyvayut to the spar (and its riveted the trailing edge) and rudder is glued with epoxy.


The centerboard is suspended on the longitudinal steering of the beam in the bracket-lug and raskrepljajut two pairs of wires, held to the side members. The centerboard is controlled by two shkantami one serves to hold the blades in working condition, the other in the raised position. The free ends of skerton fixed in the stoppers located on the deck.


Unexpected interference with the bottom or underwater obstructions the centerboard has the ability to lean back and rise up, and after passing the obstacle again returns to its working position.


The rudder is fixed on the axis between the two cheeks, and one of the cheeks are attached to the tiller by which the rudder was installed on the axis in the bushing at the end of the steering beams, and turns. For easy control of the tiller is supplied with a extension tube, connecting them through the universal joint. Lifting and lowering of the rudder is attached to it

skerton, the end of which also is fixed to the stopper on the deck


CATAMARAN Currently, the catamaran “Fish” complete purchase sail the Bermuda. However, in the beginning was Samogitia and is also quite suitable. It then gave Andrew czernikowo, built like a catamaran. This sail is still his ship shows quite high performance.


Design Samolety sail classic — also the Bermuda type. Only on the bottom of his foot made Letterman for Lata. And as shown by the sea trials and operation, it was not unnecessary.


Paddle — mover for a catamaran, though not basic, but necessary. Especially when maneuvering in cramped conditions, not to mention the course sevindik, and upon approach or retreat from the shore (if you don’t want getting wet), and sometimes just to warm up. I (paddles) — two identical hinged. Cushion paddle made of duralumin tubes with a diameter of 30 mm, and the blade from a sheet of aluminum with a thickness of 1,5 mm. At the uselessness of oars stacked on the sides and do not interfere with the blades at the same zapihivaetsya in front pockets and cushions are placed along the stringers, resting arms on podmazova beam.


The weight of the catamaran about 100 kg, and packaged the whole structure disassembled in two cover approximately the same distribution of mass. But it would be better if you place it in three packs — then to handle the Luggage will be easier, especially when lifting on the top shelf in the passenger train.

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