The legendary Soviet motorboat, popularly known as Kazanka, has become a true symbol of the era of mass development of water spaces. A special place in the hearts of water engines is occupied by modifications equipped with welded boules - additional elements of buoyancy on the sides. These design features have significantly expanded the functionality of a simple aluminum boat, making it safer and more stable on the waves.
Many owners still operate these vessels, valuing them for their maintainability and ease of maintenance, but in order to properly manage such a vessel or make a decision about its purchase, you need to understand its details. technical specificationsWithout understanding the physical properties of the housing and the distribution of weight loads, even the most reliable design can behave unpredictable.
In this article, we will conduct an in-depth analysis of all the parameters that determine the performance of the Kazanka with boules, and we will look at how the presence of additional buoyancy compartments affects the stability, passenger capacity and permissible power of the outboard motor, which will help you better understand your boat.
Design features of the body and boules
The core of the design is the hull of aluminum-magnesium alloy AMg5M or AMg5B, which provides high corrosion resistance. Booles, which are sealed compartments, welded to the sides in the bow and stretch to about the middle of the length of the vessel. float-stock and increase in metacentric height.
Unlike the classic models without boules, the modifications with them have a modified bottom geometry in the area of the zygomatic lines, which allows the vessel to more efficiently ascend the wave and reduces the risk of dangerous roll when passengers are sharply displaced on board. Structurally, the bull can be made as a continuation of the board or as separate welded elements of a complex shape.
It is important to note that the presence of boules requires more careful control of welds. Aluminum is prone to fatigue cracks in areas of thermal influence, especially with constant vibration from the engine. Therefore, regular inspection of the joints of the main body and boules is a mandatory maintenance procedure.
Attention: When operating a boat with boules, it is critical to monitor the integrity of the bulkhead between the main compartment and the boulder. If water appears in the boulder, this will not only increase the weight of the vessel, but also disrupt the balance, which can lead to differentiation on the bow or side.
Overall dimensions and weight parameters
The size of the boat directly affects its transportability and ability to carry payloads: the classic Kazanka with boules has a length of about 4.3 meters in hull, and a width with the boules reaches 1.6 meters.
The vessel's own weight varies depending on the thickness of the metal and the configuration, averaging 140-150 kilograms. This is a boat heavy enough to carry by hand, so transportation is usually carried by trailer or a piece of water. load capacity And the choice of engine power.
- 📏 Full length: 4300 mm (including a hinge bar and a trawler).
- 📐 The width is maximum: 1600 mm (at the extreme points of the boules).
- ⚖️ Weight of the case: 145 kg (average value for used copies).
- 🌊 Height: 450 mm (excluding the lumber).
The size of the boat also determines its behavior on the water; a wide hull with boules has high initial stability, which means low amplitude of rolling; however, when passing a steep wave, such a boat can experience severe blows to the bottom if the speed is chosen incorrectly.
Capacity and load capacity
The official passenger capacity of the Kazanka with boules is usually 4 people, but this parameter is only true if the rules for boarding and distribution of cargo are met. Exceeding the permissible load leads to a decrease in the freeboard height, which is critically dangerous if hit by a headwind or squall wind.
The vessel's capacity is calculated by the difference between displacement and its own weight. The standard model is about 400 kilograms. This includes the weight of passengers, engine, fuel, equipment and anchor equipment. The rational distribution of this weight is key to safety.
⚠️ Warning: Never place all heavy loads (batteries, anchors, fuel canisters) on one side or only in the nose, which shifts the center of gravity and can lead to the boat tipping over even in calm water.
When planning to go out, always keep a load reserve in case of an emergency. If you plan a long fishing trip with a lot of gear and catch, the number of passengers should be reduced. Remember that water that gets inside the hull through spray shields or rain is also considered cargo.
Engine power and speed specifications
The manufacturer recommended installing engines up to 12 hp on the Kazanka with boules, however, in practice many owners operate these boats with engines with a capacity of 15-20 hp Exceeding the recommended power requires special attention to the condition of the transom and the overall strength of the body.
The speed of the vessel depends on the loading. With one driver and an engine of 10-12 hp, the boat develops a speed of about 25-30 km / h. When fully loaded, the speed drops, and the boat goes into sliding mode with great difficulty, consuming more fuel.
| Type of load | Engine power (hp) | Speed (km/h) | Mode of traffic |
|---|---|---|---|
| 1 person + equipment | 9.9 - 12 | 28 - 32 | planing |
| 2 people | 9.9 - 12 | 22 - 25 | Transitional/plane |
| 3-4 people | 15 - 20 | 25 - 28 | planing |
| Full load | 8 - 10 | 12 - 15 | Water-displacement |
With more powerful motors, you can more confidently pull a loaded boat into the plane, but remember that the aluminum hull has a bending strength, and frequent use at high speeds with heavy chop can lead to cracks in the cheekbones and transoms.
To save fuel and engine life, try to go into the plane smoothly, without a sharp opening of the throttle. This will also reduce the impact load on the bottom.
Water stability and safety
Booles make a dramatic difference in the behavior of a boat on the water compared to a clean Kazanka, and the main advantage is that you can't flip a boat with the effort of one person standing inside, and the Booles create a powerful recovery moment, returning the boat to a horizontal position when rolling.
But there's the concept of dynamic stability, and if you turn abruptly at high speed or hit the side in a steep wave, the boat can get a strong roll, and if you instinctively rush to the opposite side, then you have a resonance that can be fatal.
Security The Kazanka is small, so any wave that crosses the side must be removed immediately, and the presence of water inside reduces stability and increases the risk of loss of controllability.
⚠️ Warning: It is strictly forbidden to board or bullboard to correct anchors or gear during movement or on a strong wave, this action shifts the center of gravity beyond the projection of the support and is guaranteed to lead to a revolution.
Maintenance and durability of the structure
The AMG5 aluminum alloy that the boat is made of does not require painting to protect against corrosion in fresh water. However, in salt water or when stored in air, the metal can oxidize. Regular washing with fresh water after use in sea water prolongs the life of the hull.
Special attention should be paid to the condition of the welds. Motor vibration and shocks to the wave create cyclical loads. Once a season, it is recommended to inspect the inside of the body for microcracks, especially in the area of attachment of cans, switches and transoms.
- 🛠️ Check rivets and bolt connections switches.
- 🧼 Cleaning the bottom of algae and silt to maintain speed.
- 🔨 The dents on the boules (if necessary) without heating.
- 🎨 Treatment of scratches with special compositions for aluminum.
The durability of the boat also depends on storage conditions, and the best option is to store it under a canopy or in a room upside down, which prevents the accumulation of precipitation inside and protects against ultraviolet radiation, which destroys rubber seals and wooden elements.
☑️ Seasonal inspection of Kazanka
Secrets to Boolean Repair
If a leak is found in the boulay, do not rush to brew the hole. Often the water enters through leaky rivets near the timber, drill the lowest place of the boulay to pour water, dry the body and only then seal the hole found.
Modifications and differences from other models
There are several modifications of Kazanka, and it is important not to confuse them: the Kazanka-M model already had a reinforced transom and cheekbones, but no boules. Modifications with boules are often called Kazanka-2 or simply Kazanka with boules, although officially they could be produced under different indexes depending on the year and plant.
The main difference from similarly sized PVC boats is the rigidity of the hull and the ability to install a more powerful engine without risking damage to the cylinders. However, an aluminum boat requires storage and transportation space, whereas a PVC vessel is compactly folded.
A unique feature of Boolean modifications is the ability to install an outboard motor with a capacity of up to 20 hp without a critical risk of overturning, which is not available for narrow models without booleans at full load. This makes them a versatile tool for fishing and recreation.
FAQ: Frequently asked questions
Can I increase the power of the engine in Kazanka with boules?
Technically, it is possible to install the motor up to 20-25 hp, but this will require strengthening the transom and extremely careful management. the factory recommendation is up to 12 hp Excess power removes the boat from the warranty (if any) and increases the risk of accidents.
How to check the tightness of the boules at home?
The easiest way is to pour water inside the boule through a drainage hole (if any) or a drilled hole, then flip the boat over and see if the water is leaking out, and you can also use a soap solution and a compressor to put air in and watch the bubbles.
Do I need to paint an aluminum Kazanka?
In fresh water, painting is optional, aluminum is protected by an oxide film, boats are usually painted for aesthetics or to hide defects, and in salt water, painting the bottom with antifouling compounds can be useful, but requires special surface preparation.
How many people are comfortably accommodated in Kazanka with boules?
Officially, 4 people. Comfortable for fishing with fishing rods - 2-3 people. For an overnight stay with a tent on board, the boat is too small, but for a day out with the whole family, it is perfect if you follow the rules of loading.