The LAS 1 is one of the most popular projects among self-constructing craft, especially in regions with rich fishlands and complex coastline, a model developed in Soviet times that has proven to be reliable, stable and spacious enough to withstand severe loads even when the water is turbulent. Universal design It allows you to use it both for quiet fishing and for household needs on small water bodies.
The main attraction of the project for many masters lies in the possibility of creating a new metal-body Unlike many modern analogues, LAS 1 does not require complex stamping or factory molds, making it an ideal candidate for building in a garage. boat-cruising Often exceeds expectations, especially with the proper installation of the transom and distribution of cargo.
Many beginners mistakenly believe that the assembly of such a structure will take months, but with ready drawings and an assistant, the main work can be completed in a few days. boardsThis article will discuss all the stages of creation, technical nuances and secrets that will help you avoid common mistakes.
History of occurrence and design features
The LAS 1 project dates back to an era of active development of amateur boating sports and fishing, when factory variants were either scarce or did not meet the specific needs of users. ease of manufacture And the result is a shape that looks like a smaller version of professional fishing boats.
The key feature of the design is the use of sheet or steels with a thickness of 2 to 4 millimeters, which provides the necessary margin of safety. Scully compounds They are designed to minimize the number of welds in the underwater part, reducing the risk of corrosion and leakage in the future, which is especially important for those who plan to operate the boat in salt water or aggressive environments.
⚠️ Note: When choosing a material for the hull, remember that the use of steel requires much more thorough anti-corrosion treatment than aluminum, otherwise the life of the boat can be reduced by several times.
The geometry of the nose of LAS 1 is designed to effectively break down a small wave without creating excessive splashing. bottom silhouette It's moderate, which allows you to develop decent speed with a low-power outboard motor, while maintaining stability on the course, and this balancing of performance makes the model unique in its class.
Why aluminum?
Aluminum alloys (AMG, D16T) are preferred to steel for LAS 1 because of their lower weight and high corrosion resistance. However, aluminum welding requires the use of argon and certain skills, whereas steel is boiled with a conventional inverter.
Technical specifications and dimensions
To understand the scope of work and the possibilities of the future vessel, you need to consider its data-sheet figures in detail. The LAS 1 boat belongs to the class of small vessels, which simplifies its transportation and storage, but at the same time provides sufficient internal volume for the crew and equipment. Overall dimensions It is suitable for use on small and medium rivers.
The table below shows the main parameters that should be guided when purchasing materials and planning metal cutting. deviations from these values are possible, but they can affect the quality of the product. driving and resilience.
| Parameter | Meaning | Note |
|---|---|---|
| Full length | 4.0 - 4.2 m | Depends on the thickness of the skin. |
| maximum width | 1.45 - 1.50m | Midel-spangout. |
| Height of board | 0.55 - 0.60 m | Including the timber |
| Load capacity | 400 kg | Considering the weight of the boat |
| Body weight | 45 - 55 kg | For aluminum. |
It is important to note that loading capacity This is indicated by taking into account the buoyancy reserve necessary for the safe presence of people on board. Exceeding the recommended standards can lead to a decrease in the freeboard height and flooding with a wave. Passport power of the motor It is usually limited to 5-10 horsepower, which is enough for planing with one or two passengers.
To increase the service life of the transom, install a removable stainless steel metal plate on it, which will take on the blows from the motor bracket.
Required materials and tools for construction
The quality of the final product depends on the correctness of the selected raw materials. To assemble LAC 1 you will need sheet metal, profile pipes or corners for the set, as well as consumables for welding and sealing. Aluminum leaf AMG5 2-3 mm thick is considered the gold standard for such projects.
The list of main equipment should include not only the welding machine, but also tools for metal editing and accurate marking. Corner grinding machine (Bulgar) will be your main assistant when cutting, so you should stock up on a few spare disks, and you can not do without a high-quality drill and a set of drills on metal.
- 🛠️ Sheet aluminum or steel (the main material of the case)
- ⚙️ Profile pipe 20x20 or 25x25 mm (for spangouts and stringers)
- 🔩 Welding wire or electrodes (selected for the type of metal)
- 🧴 Polyurethane sealant (for joints and joints)
- 🎨 Printing and paint for metal (anti-corrosion protection)
Special attention should be paid fixing-pieceIf you use a combined assembly method (ribbing plus welding), the rivets must be of the same material as the skin to avoid electrochemical corrosion. A quality tool will make the cuts even, which is critical for the tight fit of parts during welding.
⚠️ Warning: Never use rusty metal or sheets with deep scratches to skin the bottom - under load such defects can become foci of structural destruction.
Step-by-step instructions for assembling the body
The process of assembling the LAS 1 boat begins with the preparation of the slipway, a flat surface on which the installation will be carried out, the first step is to cut the parts according to the drawings. Accuracy of markup And it's crucial here, because it can be very difficult to fix a metal error, so use chalk or a marker to apply cutting lines.
After cutting out all the elements, the frame of the boat is assembled, first the frames are mounted, which determine the shape of the hull, then they are connected by stringers and a keel. Spatial rigidity The frame is checked before the skinning begins, and only after making sure that the geometry is correct, you can start welding the sheets of skin.
☑️ Stages of hull assembly
The skin starts at the bottom, because it's the most loaded part, and the sheets are tightly pressed against the frame and welded, and then boiled with a solid seam. Welded joints They need to be airtight, without burns or burns, and the sides are the last to be installed, and the top edge is formed by a timber.
The final stage is the installation of floorboards (removable floor), seating cans and fasteners for the engine. Tranza It must be reinforced with additional scarves, as it is the vibration and traction of the engine that are transmitted to it. After assembly, the body must be tested for leaks before the first descent into the water.
Installation of equipment and attachments
The comfort and safety of LAS 1 operation depend on proper equipment. First of all, you need to equip the places for fastening. anchor-rim These elements must be welded to reinforced areas on the nose and stern to withstand the jerking loads.
Inside the cockpit, it is recommended to install fixtures for fuel-tankIf the boat is planned for night fishing, you need to provide in advance places for installation of running lights according to the rules of registration of small vessels.
- 🚣 Fixtures for switches (if removable switches are used)
- 🔋 Area for the battery and fuel tank with belts of fixation
- 💡 Slats for installation of running lights and navigation equipment
- 🪝 Armor and mooring (nose/feed)
Pay special attention to the organization drainholeAt the bottom of the transmutor or bottom (with plug closure) there should be drainage to remove water trapped in from rain or splashes, a basic safety requirement that is often ignored by beginners.
A well-organized interior space with fixed equipment spaces increases safety and comfort when driving a boat on the go.
Anti-corrosion treatment and painting
The durability of your LAC 1 is directly dependent on the quality of the paintwork you do, even if you used aluminum, which doesn't rust as fast as steel, oxidation and electrochemical corrosion are still a threat. Surface preparation It's 80 percent of the success. It needs to be cleaned to shine, degreased and primed.
For aluminum, epoxy soils are excellent, creating an adhesive layer to which the finishing paint sticks well. Polyurethane enamel They've proven to be the most durable coating, resistant to ultraviolet and mechanical damage, and it's best to apply the paint in a few thin layers, allowing everyone to dry according to the instructions.
The interior of the boat also needs to be protected, especially if it is to be used in salt water. Dinner redane And the area around the transom is experiencing maximum abrasive effects, so there should be maximum protection, and regular inspection of the coating and tinting of chips will extend the life of the boat for decades.
⚠️ Note: Do not use bitumen-based paints to treat the interior of the boat, as they can release toxic substances when heated in the sun.
Operation, maintenance and modernization
The LAS 1 boat requires minimal but regular maintenance. After each release, especially if the voyage was on salt water or muddy river, it is advisable to rinse the hull with fresh water. Transse-sized garment from exhaust gases of the engine should be periodically cleaned so that it does not corrode the metal.
Owners often upgrade their LAC 1 by installing more powerful motors or adding a control console. force It's important to remember the strength limit of the transom, and if you put a hydrofoil on a lower unit engine, you can improve the planing output and reduce the load on the stern of the boat.
Keep the boat upside down under the canopy so that there is no moisture and leaves inside. If the boat is standing on the water for a long time, the fouling of shells and algae can increase weight and reduce speed. Timely cleaning And applying antifouling compounds will solve this problem.
Can I put a motor more powerful than 10 hp?
Theoretically, the case will withstand 15 hp, but this will require a serious strengthening of the transom and reworking of the structure, and it may raise questions for GIMS inspectors during registration.
Frequently Asked Questions (FAQ)
What is the optimal metal thickness for LAS 1?
For aluminum, the optimal thickness is 2.5-3 mm for the skin and 3-4 mm for the power elements (trans, keel). Steel can be taken thinner - 1.5-2 mm, but the weight of the boat will increase significantly.
Do I need to register LAS 1 in GIMS?
Registration is required if the weight of the boat with the engine exceeds 200 kg or the engine power is more than 8 kW (about 10.8 hp). However, the rules may change, so the current information should be clarified at the local branch.
Can I collect LAS 1 without welding, only on rivets?
Yes, this is possible with aluminum alloys and special sealing compounds, but welded construction is considered more reliable and durable for active loads.
Where can I get the LAS 1 drawings?
Original drawings can be found in old magazines such as Boats and Yachts or Model Designer, and many modern, customized versions with standard sheets of metal are available on thematic forums.