Weight of the boat MCM: data-sheet figures against reality

When choosing the first or additional boat for fishing and resting on the water, many boaters pay attention to the Soviet classic model. MKMThis aluminum boat, produced since the mid-60s, has proven to be a reliable and durable option for small rivers and lakes. However, one of the key parameters determining the choice of towed vehicle and the requirements for registration with GIMS is the weight of the hull.

The question of how much weighs MCUThe data-sheet specifications specified in the technical documentation of the time do not always coincide with the readings of modern scales, which is due to both the specifications of production and the configuration, an understanding of the real weight is necessary for the correct calculation of the load capacity of the trailer and the assessment of the possibility of pulling the boat ashore manually.

In this material, we will analyze in detail the technical specifications declared by the manufacturer, and compare them with the actual measurements carried out by enthusiasts. Aluminum alloyThe hull can accumulate moisture or overgrow, which also affects the final mass, and it is important to separate the dry weight of the hull from the mass of the equipment to avoid overloading during transportation.

data-sheet specifications and declared mass

According to the official manufacturer's documentation, dryweight The number of hulls of a MCM boat without installed equipment and engine is 145 kilograms, which is recorded in the product passport and is the baseline for all calculations, and this is the parameter that is used in the design of trailers and calculating the maximum payload.

It is worth noting that data-sheet figures often includes the concept of “weight in gear”, which may include certain elements of equipment. For the classical model, this value is often indicated in the region of 160 kilograms, which implies the presence of regular harundukas and cans. aluminumThe slab used in manufacturing has a density different from modern alloys, which makes the body quite heavy, but durable.

⚠️ Note: boat registration with GIMS often uses the weight shown on the boat's ticket. If you buy a used boat without documents, the weight can be determined by expert means, and it can be higher than the passport due to the accumulated cargo over the years of operation.

The difference between dry weight and curb weight can be critical when choosing a towing vehicle. If your car has a trailer weight limit, you need to consider not only the weight of the boat, but also the mass of the trailer, fuel and engine. data-sheet figures They are only a guide, and you should always add a reserve of 10-15% to them.

The technical specifications also indicate maximum load capacityThis means that the total weight of passengers, cargo and engine must not exceed this limit, otherwise the buoyancy and stability of the vessel will be disrupted, which is life-threatening.

Actual weight: why it is different from documents

Practice shows that the real weight of the boat MCM, put up for sale or weighed on modern scales, often exceeds the passport 145 kg. Owners and experts call the figures from 155 to 170 kg for a bare hull.

First of all, it has to do with the technological tolerances of Soviet production. aluminum-leafThe staining and sledding from which the welding were welded could vary within the GOST tolerances of the time, and welds made by hand or semi-automatically could contain more moulded metal than was assumed in the theoretical calculations of the designers.

The second factor is the legacy of exploitation, and over decades of use, water, sand or dirt could get into structures, or into double bottom voids, or paioles. corrosion and oxidation of the metal, as well as the layering of paint at each repair add their grams, which in total give a tangible increase.

Also worth considering is the configuration. Often, "boat weight" means a body with already embedded transom plates, duck brackets and other elements that are not included in the base "dry weight". Tranza Stainless steel or reinforced plywood with impregnation can weigh much more than standard aluminum.

The effect of painting on the mass of the body

Repeated painting of the boat with enamels and soils can add 3 to 7 kg to the total weight of the hull. Each layer of paint, especially if the previous ones were not removed completely, weights the structure.

Design features that affect the mass

The boat MCM has an all-welded hull from aluminum-alloy This design provides high strength and wave holding capacity, but inevitably increases the mass compared to lighter models such as Kazanka or modern PVC analogues, the weight is distributed in such a way as to ensure good stability.

And the design of the bottom, which is very special, is made with a pronounced keel and zygomatic stringers, which improves performance, but it's these elements, which are made of thick metal, that make up a lot of the mass. Bones The sides are also thick enough to withstand impacts on ice or rocks.

Let’s compare the main parameters affecting the mass with other popular models of the time:

Parameter	MKM	Kazanka-M	Krym-M
Case material	Aluminum alloy	Aluminum alloy	Aluminum alloy
Body weight (kg)	145-160	145	190
Load capacity (kg)	400	400	350
Length (m)	4.5	4.0	4.3

As you can see from the table, MKM It is in the middle weight category, second in weight to the heavier "Crimea", but winning over the "Kazanka" in strength and seaworthiness. The design provides for the presence of harunduks in the bow, which also add weight, but increase the functionality of the boat.

Impact of equipment and attachments

When you talk about the weight of a boat, you can't ignore the impact of attachments, and even without the engine, you can have heavy elements attached to the transom, like anchor ducks, leera, sonar brackets or navigation brackets. equipment It should be taken into account when planning transportation.

The seat (bank) and the knobs are particularly heavy, and the MCM seats are made of metal or plywood with upholstery, and if the owner replaces them with more comfortable seats with soft fill, the boat can weigh another 5-10 kg. transom plate The engine is also a significant element.

Often, owners install additional buoyancy blocks, gearboxes, or even homemade console control panels on the boat, each of which changes weight and overall weight. The hinged motorEven when removed from the transom, it is often stored inside the boat during transportation, which is categorically not to be forgotten when calculating the load on the trailer.

• 🚤 transom plate: It can be reinforced by owners for powerful motors, adding up to 5 kg.
• 🪑 Seats: Replacing regular cans with chairs increases weight and comfort.
• ⚓ Anchoring equipment: The anchor, chain and falin in the nose runduct are an additional 10-15 kg.

⚠️ Attention: Installation of homemade floating cylinders made of foam or pipes inside the hull, although it increases safety, significantly increases the weight of the boat and reduces the payload capacity.

Transportation and trailer requirements

Knowing the real weight MCUFor a body weighing about 160 kg and an engine weighing 40-50 kg (in a boat), the total weight of the cargo will be more than 200 kg. the weight of the trailer itself (usually 150-200 kg), the total weight can reach 400 kg and above.

Most “B” category passenger trailers will be suitable for this mass, but it is important to check the condition of the chassis. Aluminum case During transportation requires reliable fixation to eliminate vibration, which can lead to fatigue cracks in welds.

When driving on public roads, you need to take into account that the inertia of a heavy trailer with a boat increases, the braking distance of the car increases, and the maneuverability decreases. Speed of movement It is recommended to limit such load, especially on wet roads or in side winds.

Getting a boat off the trailer and getting ashore by hand is a challenge for two or three people, and a 160 kg weight cannot be safely moved alone without a sled or a crane beam. trailer with a good descent mechanism is a prerequisite for comfortable operation.

Comparison with modern analogues

In the modern world of water-motor technology MKM It looks heavy compared to new models made of aeronautical aluminum or composite materials, and modern boats of the same length can weigh 30-40% less thanks to the use of thinner sheets and optimized geometry.

However, strength The Soviet metal supply is often put above weight savings, where a modern thin-walled boat can get a dent from hitting a snag, the MCM is only slightly deformed, making it preferable for fishing in hard-to-reach places where it is not speed but survival of the vessel that matters.

If you're critical to weight, like pulling a boat to a gentle shore with one man, you might want to consider lighter options or use a winch. But if the boat is operated from a concrete slip and stored on water or under a canopy, the weight is MKM It is not a problem, but rather a guarantee of sustainability.

• 📉 Modern alloys: They can reduce weight without losing strength, but they are more expensive.
• 🛡️ Safety margin: MCM wins over many analogues in resistance to mechanical damage.
• ⚖️ Balance: heavy body better extinguishes the wave, providing a soft run.

FAQ: Frequently Asked Questions About ICM Weight

Can I transport a MCM boat on the roof of a car?

Theoretically, it is possible if the roof and rails can withstand a load of more than 100 kg (the weight of the boat without a motor). However, the length of the boat 4.5 meters creates a huge sailing and overhangs, which makes such transportation extremely dangerous and illegal without special permission and position lights.

Will the weight increase if you sew the deck with plywood?

Yes, a 10-12mm plywood covering of a deck (cockpit) can add 20 to 30kg to the weight of a boat depending on the surface area of the stitching, which will have a significant impact on the load capacity and driving performance.

What is the maximum weight of the engine recommended for MCM?

The manufacturer recommended motors up to 25 hp (for example, Whirlwind-25 or Mercury 25The weight of this motor is about 45-50 kg. The installation of more powerful and heavier motors shifts the center of gravity and can lead to differentiation at the stern.

Does rust affect the weight of an aluminum boat?

Aluminum does not rust normally (iron oxides), but it is corrosive. Aluminum oxides can accumulate in seams and hard-to-reach places, adding a small amount of weight. The bulk of the gain is not from oxides, but from dirt, silt and water that have been trapped in structures over the years.