Small metal vessels are experiencing a real renaissance, and among them a special place is occupied by the boat. boat OBU 5This vessel, developed by Novosibirsk Metal Service, represents an evolution of classic Ob projects, but taking into account the requirements of modern water engines, owners appreciate it for its maintainability, simplicity of design and ability to withstand shocks that would be fatal for an inflatable board.
Why is this particular dimensional series that attracts the attention of anglers and hunters? load-carrying capacity and dimensions that allow the boat to be transported on a passenger trailer without special permits. Aluminum case This is a great way to keep the nose in shape and keep the wave going, and in this article we will take a look at everything from the thickness of the metal to the recommended engine power, so you can make an informed decision about buying or upgrading.
And it's worth noting that factory data is just a starting point, and real exploitation makes adjustments, and understanding physical properties. lamb (aluminum-magnesium-manganese) will help you extend the life of a boat by decades, and many people mistakenly believe that metal requires complex maintenance, but when done right, it forgives more mistakes than a composite or a fabric. Let's dive into the numbers and the facts.
Overall dimensions and weight parameters
The first thing that catches your eye when you look at it Obi 5. It's an impressive 4,600 mm long, and it's a size that allows you to comfortably accommodate a crew of three or four people with a full set of equipment, and it's 1600 mm across the midsection. best-case For parking and trolling stability, a narrow nose minimizes water resistance, and a stern-expanding shape provides good stability.
The 700mm height is a parameter that is often underestimated by beginners. stand up In a spinning boat or sonar boat, without fear of drawing water even when rolling, the dry weight of the hull without attachments is about 190 kg. This imposes certain transportation requirements: you will need a reliable trailer and possibly a winch to load.
The depth of the cockpit allows you to place additional knobs or fuel tanks under the seats without sacrificing legroom. It is important to consider that the actual weight can vary depending on the configuration and thickness of the used. metal-sheetFactory tolerances can range between 5 and 10 kg, which is the norm for this class of vessel.
- 📏 Length full: 4600 mm
- 📏 Maximum width: 1600 mm
- 📏 Height of the side: 700 mm
- 📏 Body weight: 190 kg
⚠️ Warning: When transporting on the top trunk of a passenger car, make sure that the load on the roof does not exceed 75-100 kg. Obi 5. It is recommended to use only a specialized trailer with a pad.
Shell design and materials used
The basis of durability OBE 5 This is the material, the AMG5M alloy. magnesiumIt's highly corrosive in fresh and salt water, and unlike duraluminium, it doesn't require painting to protect against rust, although staining improves aesthetic properties. It has a bottom thickness of 3 mm, which is a very good color. critical for passing shallow water and contact with pebbles.
The side and deck are made of a sheet 2 mm thick, and this differentiation of thickness allows the total weight of the vessel to be reduced without loss of strength in the most laden areas. ferro-weldingUnlike riveted structures of older models, welds are less prone to leaks during prolonged vibration.
It's designed to have floating blocks or be able to install them, and it's a safety requirement that you can't ignore. OBE 5 The factory configuration may vary, so the presence of floating elements should be checked when buying a used version.
What is an AMg5M alloy?
It's a deformable aluminum alloy, about 5 percent magnesium, not hardened by heat treatment, but it's very weldable and corrosion resistant, and it's this material that makes the Ob so resilient and maintainable in the field.
It's worth mentioning the shape of the bottom, it has a moderate keeliness, which allows for a gentle entry into the wave, but planing under full load can be a yaw if you don't use it. cross-plate Or you can choose the right engine.
Capacity and passenger capacity
Officially. OBE 5 It's certified to carry four people. loading capacity It allows you to carry much more equipment, and the total weight of passengers and cargo can reach 600 kg, making this boat ideal for multi-day expeditions, you can bring a tent, food supplies and several boxes of gear.
Weight distribution is key. When loading, you need to monitor the different. If you overload the nose, the boat becomes a roller and burrows into a wave. Overloaded stern will raise your nose, which will lead to a swelling. yaw The optimal location is to shift the main cargo closer to the center of gravity of the vessel.
td>Admissible power of the motor
| Parameter | Meaning | Note |
|---|---|---|
| Passenger capacity | 4 people. | Passport. |
| Load capacity | 600 kg | Including the crew. |
| up to 60 hp | Optimum 40-50 hp. | |
| Maximum speed | 45 km/h | With a 50 hp engine. |
Distribute heavy items (batteries, anchors, fuel) along the diametric plane and closer to the center of the boat to maintain stability.
When calculating your fuel supply, consider that 600 kg is the limit. If you plan a long trip with a full tank and four adult passengers, you should avoid the extra load. Security Always be a priority over comfort.
Operational and seaworthiness
On the water. OBE 5 It's a predictable behavior, because it's drawn out, it's a very good course, which is especially valuable in trolling, but on the side, the metal body can create a very tangible sway, and it's a fee for a narrow shape that's good for speed. stabilizer It's on a lower unit engine.
Entry into planing occurs at a motor power of 30 hp. with one passenger. With a full load, you will need an engine with a capacity of at least 40-50 hp. graffiti A landing too low will increase drag, too high will lead to cavitation and overheating of the engine.
The boat is great for large reservoirs, Ladoga, Onega and even sea trips in the coastal zone, but it is worth remembering that this is not a sea vessel. Obi 5. It's only possible in calm weather and in close proximity to the shore, and aluminum holds the impact well, but it's not designed for stormy conditions.
☑️ Checking before getting on the water
Comparison with competitors and analogues
There are many analogues on the market, such as Kazanka, Salute or PVC boats. Kazankoy-M, OBE 5 The winners are in weld quality and modern design. Kazankas often suffer from rivet leaks, whereas the welded body of the Ob is more sealed. However, Kazanka can be easier and cheaper to buy.
Compared to PVC boats, metal loses weight and build/disassembly time. safety You can go to the reeds on the Ob, you can stand on the rocky shore and not be afraid of the sparks from the fire. For hunters, this is a decisive factor. PVC requires a more careful attitude and special protective linings.
Compared to the more expensive aluminium boats like Borus or Apache, Ob 5 is less comfortable and more complex than the other, and competitors often have more complex bottom geometry, which provides better planing. price The Ob remains one of the most affordable offerings in the metal boat segment.
⚠️ Warning: When buying a used boat, be sure to check the condition of the transom. Cracks around the engine mounting holes are a common problem caused by the vibration of powerful engines.
Tuning and improvement DIY
Owners Obi 5. They often use tuning. The most popular modification is the installation. console It's a windshield, and it's a lot more comfortable and spatter-proof, and you can buy pre-made consoles or make them yourself out of sheet aluminum using blueprints from the Internet.
The second important element is the rundoos, and the regular wooden cans are uncomfortable and take up space, and the installation of sealed rundooks on the sides frees up the cockpit and creates additional storage space. batteryIt is important to seal the knobs so that if a boat overturns, they will work as an additional buoyancy.
The third aspect is lighting. You need to install running lights and cockpit lights for night fishing, you need to do the wiring right away, using sea connectors to avoid oxidizing the contacts, and many people put sonars and navigators right on the console, which makes fishing more efficient.
Competent tuning turns a simple “lohanka” into a full-fledged fishing boat, increasing safety and comfort on the water.
Frequently Asked Questions (FAQ)
Which engine is best for the boat Ob 5?
The best choice will be a four-stroke engine with a capacity of 40-50 hp It will provide a confident planing with full load and will be more economical than two-stroke analogues. For two people, 30 hp will suffice, but with a power reserve maneuverability and speed will be higher.
Should I paint an aluminum boat?
Painting is technically unnecessary, because the oxide film protects aluminum, but painting with epoxy soils and polyurethane enamel improves appearance, reduces algae fouling, and makes it easier to wash away dirt and fuels.
Is it possible to go to the sea on Obi 5?
You can only go to the coastal zone in calm weather (waves up to 0.5 meters), the design of the boat is not designed for a sea storm, and the open cockpit does not protect against flooding with off-shore water.
Where can I find the plans for the boat?
The drawings are often posted by owners on specialized powerboating forums. The official factory rarely publishes detailed engineering drawings for public access, but the basic dimensions are in the product passport.