The metal boat Ob Gaziso is a unique hybrid created by craftsmen for those who appreciate the reliability of Soviet alloy, but strives for greater comfort. Obi.which is known for its indestructibility, while the superstructure gaziso It brings modern ergonomic solutions, and this combination allows you to create a vessel that can withstand the harsh conditions of northern fishing and long treks in large bodies of water.
Owners often search for Ob Gaziso's designs to recreate this masterpiece of small aviation on the water in their garage or workshop. It's not just a desire to save money, but an attempt to get exactly the functionality that is required for specific tasks. Unlike factory counterparts, homemade makes it possible to take into account all the nuances of operation, from the location of the runduks to the height of the cockpit.
And it's worth noting that the process of reworking requires not only a mechanic, but also an understanding of fluid dynamics. If you're not designed correctly, you can shift the center of gravity, which can negatively affect the stability of the vessel on the wave. universalReady for any kind of test.
Technical specifications and design features
The basis of the project is a body made of aluminum-magnesium alloy AMg5M. This material has high corrosion resistance and strength, which is critical for operation in salt water or frequent contact with the ground. Boat Ob Gaziso retains the dimensions of the original: the length is about 4.5 meters, and the width of the transom allows you to confidently install motors with a capacity of up to 50 hp.
The key difference is the modified geometry of the cockpit and the presence of a full-fledged windshield. gaziso It offers protection from splashes and wind, making it comfortable to stay on the water even in bad weather. The increased height of the bow in the bow prevents the wave from flooding, which often happens on classic models when driving against the wind.
The weight of the structure is important. The aluminum body is light, but the extra elements can add to the mass, so you have to control the amount of metal you use when you design it. Optimal distribution This is achieved by placing fuel tanks and batteries in the bow, which compensates for the weight of the heavy motor on the transom.
⚠️ Note: When welding aluminum, be sure to use argon and properly selected additive materials, as a violation of the technology will lead to the formation of microcracks and loss of sealed housing in the future.
Below is a table comparing the basic specifications of the standard Ob and the modified version of Gaziso:
| Parameter | Ob (Standard) | Ob Gaziso (Mod) |
|---|---|---|
| Length, mm | 4500 | 4500 |
| Width, mm | 1600 | 1650 (including boules) |
| Height of the side, mm | 700 | 900 (in the nose) |
| Load capacity, kg | 400 | 450 |
| Recommended power, hp | 20-30 | 30-50 |
Modernization process and welding
The OB Gaziso boat begins with detailed designs, and the angles of the zygomatic sheets and bottoms must be precisely calculated to maintain the original's driving qualities. Any deviation from the specified angles can lead to yawing or slowing down. Welding aluminum alloys requires high skill, because the material is highly thermally conductive and oxidizes quickly.
In the process of modernization, the cockpit is often expanded and the transom is strengthened. reinforced The extra scarves and stiffness ribs are welded on the inside of the transom, which avoids vibration and deformation when the engine is running at high speeds.
☑️ Preparation for welding of the shell
Special attention should be paid to sealing the seams. Even a microscopic defect can cause water to enter. After welding, all the seams are checked with kerosene or special penetrants. If you plan to use the boat in salt water, it is recommended to anodize or apply special primers for aluminum.
⚠️ Warning: Never attempt to cook aluminum without a protective gas (argon), the use of fluxes for steel is unacceptable and will lead to rapid destruction of the seam.
Installation of deck and interior layout
The interior of the boat, Ob Gaziso, must be organized as efficiently as possible. The deck is usually made of corrugated aluminum sheet 2-3 mm thick. This ensures safe movement on wet surfaces. Under decks are often arranged sealed locks to store things that should not get wet.
For fishermen, the key is that sonar, navigation and other equipment can be installed, and the wiring is best placed in corrugated hoses and hidden under the sides or under the deck, which will protect the cables from ultraviolet light, mechanical damage and moisture. Electrical equipment It should be powered through a separate battery so that the discharge of the starting battery does not leave you without communication.
The crew's comfort also depends on the proper installation of the seats, which must be positioned so as not to disturb the centering of the boat, removable cans allow flexible configuration of the cabin depending on the number of passengers or the volume of cargo, for long transitions, soft seats are often installed with the ability to store gear under them.
The Secrets of Ergonomics
When planning seating, note that the center of gravity of passengers should not shift too much towards the sides, otherwise the boat will be more inclined in turns, optimally position the main seats along the diametric plane or symmetrically relative to it.
Propulsion and control
The choice of engine for the boat Ob Gaziso depends on your goals. For quiet fishing and cruising, a motor with a capacity of 15-20 hp is enough, which will provide a speed of about 25-30 km / h. If you plan to plane with a full load or tow a water skier, you should consider options with a capacity of 30-40 hp and above.
An important element of the control system is the humming wheel or remote control. steering It's a cable-driven system, which makes it much easier to maneuver at high speeds, and the windscreen also has an aerodynamic effect, so you have to take the wind load into account when you install a powerful motor.
The fuel system requires special attention. The tanks are better placed in the bow or under the seats, ensuring reliable mounting and ventilation. The use of quality hoses and sediment filters will protect the carburetor or injector from contamination. Regular inspection of the fuel system is the key to safe operation.
To reduce fuel consumption and increase speed, install a hydraulic lift (hydrofoil) on the engine's lower unit on the transom - this will improve the output for planing and stability of the course.
Painting and anti-corrosion protection
Aluminum doesn't rust like steel, but it's susceptible to oxidation and electrochemical corrosion. The surface of the Ob Gaziso boat must be carefully prepared before painting. It uses sandblasting or brushing, and then it uses non-ferrous metals to adhesive paint.
The most common coloring of the case is epoxy enamel or polyurethane compounds, which form a strong, elastic coating that is resistant to shock and water. The color is chosen not only for aesthetic preferences, but also for practical reasons: light colors are less heated in the sun, and dark colors are less noticeable to fish.
Protecting the underwater part also involves zinc anodes, which sacrifice themselves to take on the electrochemical effects of water, thereby keeping the body intact. The replacement of anodes should be carried out annually or as they are destroyed.Otherwise, the defense will stop working.
⚠️ Note: Do not use paints containing lead or copper in aluminum, as this will cause severe galvanic corrosion of the metal.
Operation and storage of craft
The Ob Gaziso boat, like any technically sophisticated product, requires proper care. After each saltwater trip, the body must be rinsed with fresh water to wash off the salt. Storage is best done in an upside down position under a canopy or in a garage to prevent precipitation and direct sunlight from entering the cockpit.
Winter conservation involves lubricating all moving parts, checking the condition of the seams and removing attachments. If the boat remains on the water, be sure to use anti-fouling coatings or regularly clean the bottom of algae and shells, which can increase resistance and weight.
Regular inspection of the transom and the engine attachment will allow you to detect fatigue cracks in time. Aluminum has the ability to accumulate metal fatigue at constant vibrations. Timely repair of minor defects will prevent serious accidents on the water and prolong the life of your boat for many years.
Proper storage and regular corrosion prevention extend the lifespan of an aluminum boat to 30-40 years or more.
Frequently Asked Questions (FAQ)
What is the best aluminum thickness to use for underbody repair?
For repair of the bottom of the boat Ob Gaziso is recommended to use sheets thickness of at least the original, that is, 2 mm, and in places of increased loads (keel, cheekbones) it is better to take 3 mm. It is important that the brand of the alloy corresponds to the original (AMg5M) to avoid electrochemical corrosion in the place of the weld.
Can I install a 50 hp engine on the Ob Gaziso?
Theoretically, the body of the Ob can withstand such a motor, but this will require serious strengthening of the transom and changing the weight distribution. For a standard Ob, the safe limit is 30-35 hp. Excess power can lead to loss of controllability and even overturning the boat during sharp maneuvers.
Do I need to paint the boat from the inside if it is made of aluminum?
Painting the inside of the boat is not necessary in terms of corrosion protection, because aluminum itself forms an oxide film. However, painting improves aesthetics, makes cleaning easier and allows you to mask the welds. Often the interior is simply ground and left in metal color or covered with transparent varnish.
Where can I find the exact blueprints for Obi's remodeling in Gaziso?
There are no exact factory drawings of the Gaziso modification, because it's a folk project, and the drawings are created by enthusiasts based on the measurements of the original Ob and the desired changes, and you should look for them on specialized powerboating forums where users share their experiences and schemes.