The Soviet motorboat, popularly nicknamed Kazanka, has been one of the most common watercrafts in the post-Soviet space for decades. Despite the emergence of many modern analogues of PVC and composites, it is the most common watercraft in the post-Soviet space. aluminum This boat is legendary for its popularity and high liquidity in the secondary market, but when choosing a used one or preparing for transportation on the roof of the car, the owner inevitably faces the question of the real weight of the structure.
Many beginners mistakenly believe that the weight of the standard model and the welded version are identical, but this is not the case. The presence of additional sealed compartments, strengthening the transom and using thicker metal for buoyancy significantly affect the final figures. Real weight of Kazanka M boat with boulesIt is critical for calculating the permissible power of the outboard motor and planning logistics during descent into the water.
In this article, we will take a closer look at the design features that add kilograms to the total weight, and compare them to the basic modification, explaining why data-sheet figures may differ from weighting, and how to properly distribute the load to ensure safe swimming. Accurate data They will help you avoid overload and problems with GIMS inspection.
Design features of the model M and the effect of boules on mass
Basic model Kazanka-M It was designed as an improved version of the original Kazanka-M (without the index), devoid of many of its dangerous drawbacks, and the main external and functional difference was the presence of welded boules, sealed boxes located in the bow along the sides, which not only increase the stability of the boat, but also serve as storage tanks for things or fuel, which inevitably affects weight.
The main material of the case is the D16AT duraluminium alloy, which is valued for strength, but has the property of gaining weight as the sheet thickness increases. If the sides and bottom of the base version could have the minimum permissible thickness, then the model with booleans required structural reinforcement. Sealed compartments They were made of the same alloy, but their design included additional bulkheads and fasteners.
⚠️ Warning: When buying a used boat, be sure to check the condition of the welded seams of the boules. Violation of the tightness of these compartments not only reduces stability, but also leads to the accumulation of water inside the hull, which significantly increases the actual weight on the water.
It is also important to note that later versions, such as Kazanka-MDOther alloys (such as AMG) were used, which are lighter than duraluminium, but the concept of boules remained unchanged. The weight of an empty boat without a motor and equipment is the starting point for all further calculations of carrying capacity.
Why do the Boolees make the boat heavier?
Booles are not just thin sheets of metal, they are bulkheads with internal bulkheads, reinforced welds and additional kerchiefs to the hull, and the weight of one boolean can reach 3-5 kg depending on the thickness of the metal, and in pairs they give a significant increase in the total weight of the vessel.
Comparative weight analysis: Kazanka-M vs Kazanka-MD
To understand the situation, you need to distinguish between the classic dural M-koi and its more modern version of MD. The difference in materials used dictates a significant difference in masses. dural will be heavier than the analogue of aluminum-magnesium alloy, but it is harder and better holds the impact on solid objects.
The following is a table showing the difference in specifications between the different modifications, which can vary depending on the year of release and the state of the particular instance, but it gives a clear idea of the order of numbers.
| Model boat | Case material | Weight without motor (kg) | Years of issue |
|---|---|---|---|
| Kazanka (basic) | duraluminium | ~100 | 1955–1960 |
| Kazanka-M | duraluminium | ~130-135 | 1961-1970s |
| Kazanka-MD | AMG (Aluminum Magnesium) | ~110-115 | 1970s and 1980s |
| Kazanka-5 (with boules) | Duraluminium/AMG | ~145-150 | 1970s to A. D. |
As you can see from the data, the weight of the boat. Kazanka-M with boules The dural is about 130 to 135 kilograms, a substantial mass that is difficult to lift alone, especially given the size of the body (length 4.5 m). CBMDue to the use of lighter alloys, "weighten" by about 15-20 kg, which facilitates operation, but requires a more careful attitude to the body.
Effects of weight on transport and descent on water
The operation of a heavy dural boat imposes certain restrictions on how it is delivered to the water. Weight 130-140 kg makes it almost impossible for two adult men to lift the boat without the use of special devices or a gentle concrete slip. passenger-car roof for transportation, you need to make sure the load capacity of the trunk and the reliability of the attachment.
For safe transportation on the trailer, it is recommended to use a lozenge or keel trailer, which will evenly distribute the load. outboardThis can be in excess of 200 kg, which requires the appropriate class of driver's license and the technical condition of the trailer.
- 🚗 When loading on the roof, use inertial belts and additional safety ropes, as the sailing of the metal boat is high.
- ⚓ Descent to the water from a flat shore without a slip will require the presence of a wheel pad or the help of assistants to roll the body.
- 🛡️ The dural bottom when pulling on the pebble shore can get scratches, so it is worth providing protective runners or choosing sandy areas.
Particular attention should be paid to the distribution of weight inside the boat, the displacement of passengers or cargo on one side at a narrow boat. Kazanki-M It can lead to dangerous rolling, despite the presence of boules, and the Booles only partially compensate for this, so the discipline of loading remains a priority.
Load capacity and passenger capacity, taking into account the mass of the hull
Passenger capacity Kazanki-M However, this figure is only true under ideal conditions and weight distribution, and if you subtract from this number the weight of the boat itself (which, recall, is about 135 kg), the weight of the engine (albeit 30 kg for a light engine) and the weight of the full tank (10 kg), then the payload for people and cargo will be less than 300 kg.
This means that comfortable accommodation on board is three middle-aged adults and a small supply of gear: Attempting to load a fourth passenger or heavy equipment brings the boat closer to a critical line when it is not available. freeboard It gets too low and the stability drops.
⚠️ Attention: 400 kg overload capacity for Kazanka-M is strictly prohibited. The Duralev hull may not sink instantly due to the boules, but the boat will become uncontrollable, and any wave will lead to overflow and overturning.
To increase the payload, try to use modern light two-stroke or four-stroke motors with a capacity of 5-8 hp instead of heavy Soviet "Salutes" or "Neptune-23", the weight of which can reach 45 kg.
Maintenance and effects of corrosion on weight
Although aluminum and duraluminium do not rust as much as steel, they are susceptible to oxidation and electrochemical corrosion, especially in contact with other metals (mounts, transoms). Over time, oxide films and growths can form on the bottom and boules, which, although slightly, increase the mass of the body.
Regular washing of boats with fresh water after operation in salt water and drying help to maintain weight in normal and prolong life. duralPay special attention to the transom: if it is wooden and sheathed with metal, swelling the wood will also add extra pounds.
Checking the tightness of the boules is a mandatory procedure, and you can use a soap solution and a compressor to apply a little pressure inside the compartments, and the presence of water inside the boules not only makes the boat heavier, but also shifts the center of gravity, making the behavior of the vessel on the wave unpredictable.
☑️ Pre-season checks
Tuning and modernization: how to reduce weight or increase comfort
Owners of old Kazanok-M One of the popular areas is to replace heavy wooden flooring with lighter aluminum profiles or linoleum-coated plywood, which saves a few kilograms, which is a significant factor with a low load capacity.
It is also common practice to install knobs in the bow instead of standard, heavier solutions, or to integrate fuel tanks directly into the design of the boules (if fire safety standards are met), however, any interventions in the design of the boules should be carried out with caution so as not to interfere with their tightness.
- 🔨 Replacing the transom plate with a lighter, but stronger (for example, moisture-resistant plywood with the right glue) will reduce the load on the feed.
- 🎨 Using light enamels instead of heavy primers and bitumen mastics to protect the bottom.
- 🪑 Refusal of stationary heavy seats in favor of removable soft pillows, which are easier to remove for balancing.
It is important to understand that tuning The main thing for Kazanka is reliability and safety, and any relief of the design must be justified by calculations, since duraluminium tends to get tired, and unnecessary holes or slices can become foci of cracks.
The optimal strategy of operation of Kazanka-M is not a race for minimum weight, but competent distribution of the available load capacity and regular monitoring of the tightness of the boules.
Frequently Asked Questions (FAQ)
Can I install a 15 hp engine on Kazanka-M?
Technically, it's possible to set it up, but it's not safe and often illegal without reworking. Kazanka-M has a narrow hull and low sides. 15 hp engine will bring the boat to plane even with one person, but on the wave or when the load is shifted, such a boat (easily) can tip over. In addition, the transom can not withstand the load. The recommended maximum for safe operation is 8-10 hp.
What is the difference between Kazanka-M weight and Kazanka-5?
Kazanka-5 is larger in size (length 4.6 m versus 4.5 m for the M-ki, but wider and with more developed boules). Weight Kazanka-5 is about 145-150 kg in the dural version. The difference of 15-20 kg due to the larger dimensions and reinforced design of the fifth model, which was originally designed for more powerful engines.
How to weigh a boat at home?
The most accurate way is to use a scale (at truck weighing points or in granaries), weigh a car with a trailer and a boat, then remove the boat and weigh the car with an empty trailer, the difference will show the weight of the boat with the gear, and the home floor scale will not fit due to the load limit (usually up to 150 kg).
Do I need to register Kazanka-M with boules in GIMS?
Kazanka-M has a mass of more than 200 kg (in running condition with an engine) and a length of more than 3 meters. Under current Russian legislation, such vessels are subject to mandatory registration and require the right to operate a small vessel of the appropriate category.