Aluminum floating vehicles manufactured by Novosibirsk plant "Metallservice" for many years occupy a leading position in the budget segment of the Russian market. Ob 3The archery is a successful upgrade of classic designs known since Soviet times, and owners value it for the reliability of welds, ease of maintenance and excellent cruising in calm water.
When choosing a boat or boat for fishing, hunting or family holidays, it is extremely important to understand not only the general advantages of the brand, but also specific numbers. boats Ob 3 determine whether it will fit you to install a particular motor, whether it will be able to withstand the required load and how safe it is to ride the wave. In this article, we will discuss in detail all the parameters of the body, load capacity and design features.
It is worth noting that Ob 3 It is often confused with older versions or models from other manufacturers, but this boat has a number of unique features. Understanding these nuances will help avoid mistakes when buying a used copy or ordering a new boat. Next, we will consider the main parameters that affect the performance of this popular boat.
Overall dimensions and geometry of the body
One of the key features that makes Ob 3 The boat is designed to be easily transported on the roof of a passenger car without having to disassemble or use a bulky trailer, and has a total length of 3,800 mm, which is the middle ground for medium-sized water bodies.
The midfield width is 1400 mm. This width provides sufficient stability, allowing the fisherman to confidently stand on board to throw tackles without fear of a sharp roll. However, it is worth remembering that when fully loaded with passengers and equipment, the metacentric height can vary. The height of the midship is 500 mm, which prevents the wave from swamping when moving against the wind, but requires accuracy when landing.
It is important to note that the dimensions boats Ob 3 The compact hull is worse at keeping the wave hit at high speed than the larger boats, but it is better at maneuverability and handling on narrow rivers.
- 📏 Length full: 3800 mm
- 📏 Maximum width: 1400 mm
- 📏 Height of board: 500 mm
- 📏 Unladen draught: 150 mm
⚠️ Attention: When transporting on the roof of the car, be sure to check the reliability of the mounting. Despite the low weight, the sailing of an aluminum boat on the highway can play a cruel joke in the side wind.
Weight specifications and load capacity
The issue of weight is one of the first when choosing a transport for transportation. Ob 3 It's made of aluminum-magnesium alloy, which makes it much lighter than its steel counterparts, and it only weighs 90 kilograms without a motor or equipment, which allows two physically advanced men to load a boat onto the roof of a car without the need for complex lifting mechanisms.
The model is officially declared to have a capacity of 400 kg. This weight includes the mass of passengers, engine, fuel, equipment and the hull itself. If you plan to take on board three people (an average weight of 90 kg), an engine (30 kg) and a fuel reserve (20 kg), you reach the limit of 320 kg, leaving only 80 kg for anchor, gear and personal belongings. Passenger capacity This is not a recommendation, but a safety limit.
Spread the load evenly over the cockpit. Shifting gravity to one side can lead to a critical roll, especially at low speeds.
It should also be borne in mind that the actual weight of the boat may differ slightly from the factory one depending on the year of manufacture and configuration. The presence of additional hazelnuts or reinforced transom can add several kilograms to the total weight.
| Parameter | Meaning | Units |
|---|---|---|
| Hull mass | 90 | kilogram |
| Load capacity | 400 | kilogram |
| Passenger capacity | 3 | man. |
| Max, engine power. | 15 | hp |
Design features and materials
hull Ob 3 It's made of AMG5M aluminum alloy, which is highly corrosive and durable. Unlike steel, aluminum doesn't rust as you know it, although it can oxidize when it comes into contact with salt water or galvanic vapors. Welds are made with argon-arc welding, which makes them tight and durable.
One of the main features of the design is the presence timber Not only does it protect the boat from impacts on the pier, it also acts as a stiffening edge to prevent the skin from deforming when hit by a wave, and the bottom of the boat is flat, without the pronounced zygomatic bend that is typical of simple aluminum boats.
Features of the alloy AMG5M
This alloy contains magnesium, which increases its strength and ductility, and is perfectly welded and resistant to freshwater, but requires washing after use in salt water to avoid pitting corrosion.
The truncheon of the boat is reinforced and designed to install an outboard motor with a capacity of up to 15 hp It is important to comply with this limit, since excess power can lead to the destruction of the transom or loss of controllability due to too much pressure on the stern. The design of the aft part makes it easy to fix the engine and provide access to the lower unit.
- ⚙️ Material: Aluminum-magnesium alloy
- ⚙️ Type of welding: Argonne
- ⚙️ Bottom type: Flat floor
- ⚙️ Strengthening: A timber around the perimeter
⚠️ Attention: Avoid contact of the aluminum case with copper products in water (for example, bronze screws without protection).
Capacity and interior arrangements
Interior space Ob 3 The cockpit is divided into several compartments, allowing storage and ensuring that things are not sinkable, and the bow is often a kunduk that can be used as a passenger seat or storage space for dry stock and equipment.
The seats in the boat are usually removable or folding, which allows you to move freely on the cockpit, which is especially important when catching large fish or changing the fishing area if necessary. Free space It allows you to place fishing boxes, tents and other necessary equipment without compromising the comfort of the crew.
For fishing in hot weather or long transitions, you can install a tent canopy. The design of the boat provides for the installation of tent stops, although they may not be available in the basic configuration. The presence of an awning greatly expands the possibilities of using the boat, turning it into a full-fledged place for recreation on the water.
☑️ Check before buying a used boat
Performance in water
On the water. Ob 3 The flat bottom provides excellent sliding, even with low-power engines. When you install a 9.9-15 hp engine, the boat easily goes to the plane with one or two passengers on board. The full-load speed is about 25-30 km / h, which is enough to move along reservoirs and rivers.
However, it is worth considering that the flat bottom makes the boat sensitive to lateral wind and excitement. On choppy water, the boat can begin to "scour" and hit the wave with the whole flat bottom, which creates discomfort for passengers. Ob 3 It is best used on calm lakes, moderate rivers and in protected bays.
The boat's handling is considered good for its class, and the 10 hp motor is enough to maneuver tightly and against the current, and it's important to properly distribute the weight of the passengers, because shifting the center of gravity to the nose or stern significantly affects the boat's behavior on the move.
⚠️ Attention: When going out for the plane with full load, watch the trim. If the boat's nose is too upside down, there is a risk of loss of control and rollover.
Care, maintenance and durability
Aluminum boats are notoriously unpretentious, but that doesn't mean they don't need maintenance at all. Aluminum's main enemy is electrochemical corrosion and mechanical damage. After each foray, especially into salt water, it's recommended to rinse the hull with fresh water, which will wash away salts and dirt that can cause corrosion.
Regularly inspect the welds and bottom for scratches and dents. Minor damage can be fixed with special sealants or cold welding for aluminum, but deep cracks require professional repair with argon welding. Timely repairs small defects prevent their proliferation and maintains the tightness of the body for many years.
The main secret of the longevity of an aluminum boat is storage in a dry, ventilated room and regular washing after use.
Lubricating the moving parts (if there are folding elements), checking the seat fasteners and the transom are simple operations that will take a little time, but will prolong the life of your boat, it is also worth periodically checking the condition of the paint or coating, if it is applied, and if necessary updating it to protect the metal.
Comparison with analogues and final conclusions
In its price segment Ob 3 It has virtually no direct competitors with the same combination of price and quality. Compared to similarly sized PVC inflatable boats, it benefits in durability and safety (not afraid of sparks from fires, sharp branches), but loses in weight and dimensions when transported. Comparison with more expensive aluminum boats shows that the PVC is not a big deal. Ob 3 offers basic yet reliable functionality without frills.
If you want a simple, reliable and inexpensive boat for fishing in calm waters, this model will be a great choice. It is time-tested and thousands of users throughout Russia. The main thing is to follow the rules of operation and not overload the vessel.
Frequently Asked Questions (FAQ)
What is the maximum weight of the engine can be put on the boat Ob 3?
The manufacturer recommends the use of engines with a capacity of up to 15 hp Installation of a more powerful engine is possible, but requires caution and may lead to a violation of the stability of the boat, as well as the cancellation of the warranty.
Do I need to register the boat Ob 3 in GIMS?
Yes, the boat must be registered if the mass of its hull exceeds 200 kg or if the power of the installed engine exceeds 8 hp (8 kW). Ob 3 weighs 90 kg, registration is mandatory only when installing a motor more powerful than 8 hp.
Can I use a boat on the coast?
Use at sea is possible, but not recommended for long-term use due to the aggressive salty environment: Aluminum alloy is prone to corrosion in salt water, so after each outlet the sea must be thoroughly washed with fresh water.
Does the boat have 3 buoyancy blocks?
Yes, the design of the boat provides for the presence of sealed compartments (jobnuts) and sealed space under the floorboards, which ensure unsinkability even when the cockpit is fully filled with water.