The duralumin motor boat MKM, the technical characteristics of which were almost identical to the outdated Kazanka, was launched by the Yaroslavl Shipbuilding Plant in 1968. Its main difference from its predecessor was the ability to equip a mounted power unit with a capacity of up to 25 horsepower. Nevertheless, with such a motor, the ship significantly lost in seaworthiness, there were frequent nose blows to the water, contributing to the wetting of the cockpit. Normally, the vessel can only be operated in a calm pond at a distance of no more than one kilometer from the coast.
Housing device
Considered dural boats have a hull made of aluminum with a thickness of one millimeter. The design of the element is made in the traditional style, by riveting. A flat bottom with a kilowatt index on the transom of two degrees does not particularly add to the swimming facility's directional stability. Bypass cheekbones are located quite low, which practically does not protect passengers from splashes. Some craftsmen independently installed additional chippers of various modifications.
In the area of the stern, the sides converge upward. This feature, together with some other structural nuances of the hull, made up perhaps the only advantage of the vessel, which was expressed in good parking stability. Under the aft seat and forepeak, buoyancy units standard for those times were equipped.
Interior fittings
Domestic dural boats MKM have a design in which the forepeak and the motor part are located separately from the cockpit. Between themselves they are divided by waterproof partitions. In the parking position, the power unit can be placed in the appropriate compartment and closed with a metal cover on top. Unsinkability is provided by a 168-liter forepeak and a volumetric sealed box under the stern.
The vessel is equipped with three transversely mounted cans, wind glazing, and slatted wooden slates. A pair of bow benches equipped with folding backs. In the bow under the deck there is a recess that acts as a small trunk with a lid and a lock.
MKM boat: technical specifications
This watercraft does not shine with special or outstanding indicators. Below are the main parameters of the vessel:
- maximum length / width / height - 4100/1520/570 millimeters;
- the indicator of the pitching angle in the bottom is two degrees;
- maximum power - 25 horsepower;
- weight of the MKM boat with equipment - 150 kilograms;
- carrying capacity - 0.4 tons;
- passenger capacity - 4 people;
- maximum speed with a load of 35 kilometers per hour.
The operation of the vessel in question is allowed at a wave height of not more than 250 millimeters, which significantly limits the place of its use. The optimal power unit is a motor with a power of 12 to 18 horsepower. Most users and experts agree that the dimensions of the MKM boat in combination with a low seaworthiness make its design extremely unsuccessful. However, for parking fishing and walking for short distances, the ship is quite suitable.
Finalization and repair of boats MKM
The characteristics of a swimming vehicle can be improved independently in several ways. To eliminate excessive bending of the bottom, it is necessary to dissolve rivets that fix the bottom sheathing, sides along the cheekbones, stringers with keel. The procedure should be carried out from the transom to the second frame of the stern.
The transom lower edge, coupled with the bent element, is cut off by 8 millimeters, and part of the septum of the motor block by 3 mm. According to the same principle, the edges of the side plates interacting with the cheekbone are shortened. Stringers settle flush with the new plane of the bottom, rivet in place of the transom.
The kit is temporarily assembled for bolts, sheathing sheets are pressed against it with control of the bottom contours. For this, a one and a half meter rail or a metal ruler is suitable. Over the entire area at a distance of 1.5 meters from the transom, the measuring device should be as tightly aligned with the skin. Next, the cheekbones and the keel profile are customized. In this case, the rivet sockets must be expanded to a diameter of 4.2 mm, lay the sealing tape and fix the seams with new rivets.
The second method of tuning
The MKM boat, the technical characteristics of which leave much to be desired, can be improved on its own by installing a transverse redan. This element can be made of duralumin or similar sheet alloy with a thickness of one and a half millimeters. After preparing both parts of the part, it is necessary to give it a concave shape, knocking with a wooden hammer.
The nose edge of the redana is processed in such a way as to ensure a snug fit to the skin. The supporting and connecting strips are made of hardwood or textolite. Before the final repair of the MKM boats, the sheets should be primed and painted. Fasteners are taken in the form of screws made of stainless steel or galvanized iron. Additionally, the fixation points can be strengthened with epoxy glue.
Useful Tips
The MKM boat, which can hardly be called flattering reviews, can be upgraded with additional transom plates with an adjustable angle of attack (in addition to the redan). By adjusting the angle, it will be possible to adjust the load between the plates and the redan. This will allow you to achieve optimal trim depending on the load and climatic conditions.
A useful addition to the ship in question will be the zygomatic splinter chippers. They are mounted on the sides two meters from the stem. It is possible to build parts from an alloy strip mounted on the body by means of a duralumin elbow or parts cut from it. For a more effective reflection of the spray, the surface of the chippers should look down at an angle of 10 degrees.
Conclusion
The domestic duralumin boat MKM, the technical characteristics of which practically do not differ from its predecessor under the name Kazanka, did not find much popularity among the population. The only advantageous difference is the ability to install a more powerful outboard motor. Consider a floating vehicle can be operated with motors such as "Moscow" and "Veterok".
The main purpose is amateur fishing and walking in quiet ponds near the coast. Despite all the shortcomings of the boat, there are fans of this ship. With a little skill and effort, you can upgrade and improve its seaworthiness. In the standard version, the MKM does not have any special qualities that allow it to be preferred over other boats of the same class.