Motor boat micron. Motor boat MKM: technical characteristics, description, repair. Duralumin boats. History and goals of creation

MKM duralumin motor boat, specifications which were almost identical to the outdated Kazanka, produced by the Yaroslavl Shipbuilding Plant in 1968. Its main difference from its predecessor was the possibility of equipping it with an mounted power unit with a power of up to 25 Horse power. However, with such a ship, it significantly lost seaworthiness; frequent impacts of the bow on the water occurred, which contributed to the cockpit getting wet. The watercraft can be operated normally only in a calm body of water at a distance of no more than one kilometer from the shore.

Housing design

The duralumin boats in question have an aluminum hull one millimeter thick. The design of the element is made in a traditional style, using the riveting method. A flat bottom with a two-degree deadrise at the transom does not particularly add directional stability to the craft. The bypass cheekbones are located quite low, which practically does not protect passengers from splashes. Some craftsmen independently installed additional fenders of various modifications.

In the area of ​​the stern the sides converge upward. This feature, together with some other design nuances of the hull, constituted perhaps the only advantage of the vessel, expressed in good parking stability. Under the aft seat and in the forepeak there are standard buoyancy blocks for those times.

Internal equipment

Domestic MKM duralumin boats have a design that provides for the placement of the forepeak and the engine part separately from the cockpit. They are separated from each other by waterproof partitions. In the parked position, the power unit can be placed in the appropriate compartment and closed on top with a metal lid. Unsinkability is ensured by a 168-liter forepeak and a voluminous sealed box under the stern.

The vessel is equipped with three transversely installed banks, wind glazing, and slatted wooden slats. A pair of bow benches are equipped with folding backrests. In the bow below the deck there is a recess that acts as a small trunk with a lid and lock.

MKM boat: technical characteristics

This watercraft does not shine with special or outstanding performance. Below are the main parameters of the vessel:

• maximum length/width/height - 4100/1520/570 millimeters;
• the deadrise angle indicator in the bottom part is two degrees;
• maximum power - 25 horsepower;
• weight of the MKM boat with equipment - 150 kilograms;
• load capacity - 0.4 tons;
• passenger capacity - 4 people;
• maximum speed with load is 35 kilometers per hour.

Operation of the vessel in question is allowed at a wave height of no more than 250 millimeters, which significantly limits the places where it can be used. The optimal power unit is a motor with a power of 12 to 18 horsepower. Most users and experts agree that the size of the MKM boat, combined with its low seaworthiness, makes its design extremely unsuccessful. However, the vessel is quite suitable for stationary fishing and short distance walks.

Modification and repair of MKM boats

The characteristics of a swimming device can be improved independently in several ways. To eliminate excessive bending of the bottom part, it is necessary to remove the rivet seams that secure the bottom plating, the sides along the cheekbones, and the stringers with the keel. The procedure should be performed from the transom to the second frame of the stern.

The transom lower edge, together with the bent element, is cut by 8 millimeters, and part of the partition of the engine block is cut by 3 mm. Using the same principle, the edges of the side plates interacting with the cheekbone are shortened. The stringers settle flush with the new bottom plane and are riveted into place as part of the transom.

The kit is temporarily assembled with bolts, and skin sheets are pressed against it while controlling the contours of the bottom. A one and a half meter strip or metal ruler is suitable for this. Over the entire area at a distance of 1.5 meters from the transom, the measuring device should fit as tightly as possible with the skin. Next, the bilge angles and the keel profile are adjusted. In this case, the rivet sockets must be expanded to a diameter of 4.2 mm, sealing tape must be laid and the seams must be secured with new rivets.

Second tuning method

The MKM boat, the technical characteristics of which leave much to be desired, can be improved on its own by installing a transverse step. This element can be made from duralumin or a similar sheet alloy one and a half millimeters thick. After preparing both parts of the part, it is necessary to give it a concave shape by tapping it with a wooden hammer.

The nose edge of the redan is processed in such a way as to ensure a tight fit to the skin. Supporting and connecting strips are made of hard wood or textolite. Before making final repairs to 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 using epoxy glue.

The MKM boat, the reviews of which can hardly be called flattering, can be upgraded with the help of 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 step. This will allow you to achieve optimal trim depending on the load and climatic conditions.

A useful addition to the vessel in question would be bilge splash guards. They are mounted on the sides two meters from the stem. The parts can be constructed from a light alloy strip mounted on the body using a duralumin square or parts cut from it. To more effectively reflect splashes, the surface of the fenders should look down at an angle of 10 degrees.

Conclusion

The domestic MKM duralumin boat, the technical characteristics of which are practically no different from its predecessor called “Kazanka,” has not found much popularity among the population. The only advantageous difference is the possibility of installing a more powerful outboard motor. The boat in question can be operated with motors of the “Moscow” and “Veterok” types.

The main purpose is amateur fishing and walks in quiet bodies of water near the shore. Despite all the shortcomings of the boat, this vessel also has fans. With a little skill and effort, you can modernize and improve its seaworthiness. In its standard version, the MKM does not have any special qualities that would allow this vessel to be preferred over other boats of a similar class.

What is the difference between factory windshields and glass produced by Lodka44?

Old factory glass was produced in mass production in the USSR. They were made with high quality, but over time, everything tends to deteriorate and age, so many factory windshields are damaged or not preserved at all.

Our design department constantly modernizes and improves glass and glazing frames for all production domestic boats. Glass produced by Lodka44 is divided into “Standard” and “Premium”.

“Standard” glazing is as close as possible in terms of technological features to factory glass, and its height fully corresponds to the factory analogue. The side part of the glass is extended. The kit includes a glazing frame, polished stainless steel hinges, and support posts. The glazing is made of 3 mm monolithic polycarbonate.

Glass comparison table

What are Premium windshields and how do they differ from Standard windshields?

Premium windshields are an in-house development of the design department of the Lodka44 company. For several years we have been identifying gaps and conducting surveys with our customers. We managed to combine modern technological developments, strong durable materials and the experience of automotive designers. The result of painstaking work is Premium glass.

The main difference between “Premium” glass and the “Standard” set is a new high-strength aluminum glass edging profile and new organic (“Premium-A”) and tempered (“Premium-K”) glass with a thickness of 5 and 4 mm, respectively. Unlike the “Standard” sets, in which the glass is made of polycarbonate, the “Premium” sets are more durable, more resistant to mechanical stress, as well as more transparent and look more aesthetically pleasing.

Glass sizes. For each model serial boat We have selected the optimal glass sizes for their comfortable and durable use. They are different from the factory ones. They are larger and more comfortable to use as a boat.

Glass edging Made from high quality aluminum profile. You won't have to worry about scratches or minor damage. It is much stronger and more durable than the factory one, and is highly resistant to mechanical stress.

Installation. Thanks to the technologically advanced design of the glass edging, you do not have to spend several hours installing it. We have prepared it so that your efforts are minimal. And of course, each set of glasses comes with detailed instructions for installing windshields.

Appearance. Everyone who saw the new “Premium” glasses undoubtedly chose them. They are similar in appearance and technical characteristics to automobile ones. They are also easy to paint, so you can give your boat a stunning look.

Why do you need a wicket on windshields?

A gate on the glazing of the boat is necessary for quick access to the stern. Often situations arise on the water when you need to quickly fix something or pick it up from the bow of the boat. Climbing over the windshield from the side is not always safe, since the boat has a roller structure.

Important: When ordering glass with a gate, provide the option “valve in the roof” in the awning for convenient exit from the boat through the gate.

How are new windshields installed?

Complete with windshields manufactured by Lodka44, we include detailed instructions for installing new glass. Behind long years we analyzed all the works typical mistakes and the difficulties that our clients encountered, therefore we described in detail in the instructions each step of installing glass with photographs.

Production and delivery times

Production time for glass and awnings for serial production domestic boats at the company "Lodka44" today is 14 working days from the date of placing the order. After placing your order, our managers will contact you and inform you about the exact date of dispatch of your order. Delivery time directly depends on your location and delivery method. On average, delivery times throughout Russia range from 3 to 10 days.

Guarantees

You can return any of our products within 2 weeks of receipt without giving any reason.

We are confident in our work and the quality of the products we produce.

We also provide a 1 year warranty on all our glass. During the entire warranty period, if fabric defects or other defects occur, we will replace the glass free of charge or refund your money.

In the sixties, many fishermen and amateurs used the famous Soviet cauldron. Engine power, which could not exceed 12 horsepower. This prompted design engineers to improve the motor product, and in 1968, the micron boat was released at the Yaroslavl Shipyard in Russia. In addition to the cauldron, it was based on parts from the MK-29, an older model.

Reasons for creation

The main one is the obsolescence of previous light alloy products. In addition, as practice has shown, the cauldron turned out to be unsafe for sailing with an engine over 12 horsepower.

But nevertheless, the designers considered it expedient to leave a similar hull structure in the new motor boat.

When creating theoretical drawings, the MK-29 project was used, which was distinguished by flat-keeled bottom contours and slightly heaped sides inside the transom.

Among the fishermen, the boat was named Yaroslavka.

The new vessel allowed the use of a 25 horsepower engine.

But this caused uncomfortable movement along rivers, reservoirs and any bodies of water with a noticeable current. The waves, hitting the bow of the ship, splashed the cockpit and passengers with water.

The photo shows the micron model, equipped with a motor, mounted on a special trailer for transportation.

Therefore, the owners of microns try to go out on the water in complete calm or swim on it only in reservoirs with stagnant water.

Performance indicators

The manufacturer indicates the following technical characteristics of the micron boat:

• Maximum length – 4.1 m.
• Maximum width – 1.52 m.
• The height of the side at midship is 0.57 m.
• The deadrise angle at the transom is 70, at the midship -20.
• The permissible power of the outboard motor is 25 hp. With.
• Dry weight – 157 kg.
• Load capacity – 400 kg.
• The maximum number of passengers is 4.
• Type of boat – rowing, motor.
• Built-in motor - no.
• The technology for connecting parts is riveting.
• Material – metal – duralumin.

This is a riveted duralumin structure made of D16FT alloy. Some of the parts are an aluminum mixture with the addition of magnesium AMg5M. Duralumin profiles are also used in the configuration.

A significant drawback of the vessel is the low-set chines, due to which all the splashes of water fly into the boat and onto the passengers. Experienced fishermen solved the problem by installing splash guards near the sides.

The shape of the bottom is flat, keeled. The thickness of the deck and bottom plating is 1 mm. Forepeak volume – 168 l. Under the feed can there is a 90 liter fully sealed box. It and the forepeak are a guarantee of the ship’s unsinkability.

Buoyancy blocks are installed under the aft sofa, forepeak. The engine compartment is separated from the cockpit by waterproof bulkheads. Mixed system set - 6 frames, longitudinal stringers run along the bottom.

The compartment is closed with metal covers. The free space in it can be used to stow the outboard motor. The stern sides converge upward.

The Yaroslavl boat also has an important advantage - increased stability of the vessel when stationary, which makes it convenient for operation.

Cockpit

Mkm is equipped with an aft sofa and a windshield. The set includes wooden slatted sleds. The nose of the Yaroslavl is decked. It has a luggage compartment that is closed with a lockable hatch. Through it there is access to the front deck.

Modern modification of micron. The tuning of the hull and cockpit was done with high quality.

There are two cans fixed in the sides, which are made of moisture-resistant plywood. The backs were mounted to them with a metal arc. The backrests on the bow seats are folding.

Seaworthiness of the boat

The description of the seaworthiness of the Yaroslavl boils down to the following recommendations:

• Go out on the water when the wave height is no more than 25 cm.
• The distance from the coastline should not exceed 1 km.
• Recommended engine power is 18 hp. With. A larger value can lead to the vessel capsizing when driving through waves.
• Optimal places for access to water are ponds, small rivers, tributaries, lakes.

This a good option vessels for stationary fishing, short trips for walks along the shoreline of the reservoir.

Experienced fishermen who have experience driving boats agree that due to the low chines, the lack of splash guards, and the low deadrise of the bottom, the choice of water area for riding a Yaroslavl is very limited.

Therefore, many beginners and experts began to give preference to more advanced versions of motor boats.

At one time, consultants from the magazine “Boats and Yachts” advised the plant’s design engineers to equip the boat with a transverse step and bilge splash guards. In response, the plant attempted a trial production of cuttings for Yaroslavka, but that was where the matter ended.

It was never possible to achieve mass production.

Do-it-yourself ways to modernize Yaroslavl

If you put in a little effort and patience, you can correct factory defects at home. Let's look at the main ones.

Eliminating the bend in the bottom of the boat

The sequence of steps is as follows:

1. Let's straighten the sides along the chines, rivet seams on the bottom, stringers with a keel. We do this in the direction from the transom to the second frame, which is at the stern.
2. We trim the lower edge of the transom by 8 mm and the partition of the motor block by 3 mm.
3. Using the same method, we cut the edges of the plates on board.
4. The stringers need to be installed on the new bottom, riveted in place of the missing part of the transom.
5. The structure is assembled using bolt fastening. Sheathing sheets are pressed tightly.
6. In this case, you should control the contours of the bottom with a metal ruler. If you can’t find one, a 1.5 m long rail will do.
7. The rivet sockets expand to 4.2mm in diameter. They contain sealing tape. The seams are sealed with new rivets.
8. The keel profile and bilge angles are adjusted to size.

Transverse step fasteners

The recommended material is a sheet of duralumin up to 1.5 mm thick. Using a wooden hammer, the parts are given a concave shape. The sheets are treated with a primer and painted. It is better to make supporting strips from oak, acacia or other hardwoods.

It is important to ensure a tight fit of the redan to the skin, in particular its nose edge.

The redan is secured with stainless steel or galvanized screws. Reinforce the fastening points with epoxy glue, after mixing it with a hardener.

Transom plates

Can be made in addition to the redan. They will allow you to adjust the angle. Thanks to this, the load between the stepper and the plates is adjusted and optimal trim is achieved.

Chine bumpers

Will provide protection against splashing water. The basis can be light metal alloys from which the strip is cut. It is mounted on the body with a duralumin corner. They are mounted on both sides at an angle of 100 and 2 m from the stem.

The MKM boat is the brainchild of Yaroslavl designers. It was designed for quiet fishing on a calm river or lake. One of the rare ships in its class that can throw gear from the bow deck. The creators increased the capacity and made it possible to install engines up to 25 hp.

The main advantages are strength, reliability, spaciousness. There is no need to demand high speeds from it, since it is more of a bomber than a fighter. It knows how to move quickly under weak internal combustion engines, and does not like high ripples. At the same time, he has an even, calm disposition.

Advantages

• Stability in calm water
• Capacity
• Durability, strength
• Availability of redans
• Buoyancy reserve

Flaws

• Behavior on the wave
• Splash protection

Photo of the MKM boat:

History and goals of creation

Until 1967, the only duralumin motor boat of serial domestic production was, which turned out to be insufficiently safe when installing outboard motors over 12 hp. The design is based on the plywood prototype MK 29. The development team was faced with the task of launching a duralumin vessel into series, the manufacture of which does not require complex high-temperature technological processes. So that it can be produced at any small enterprise. Moreover, everyone can assemble it with their own hands according to the drawings that are freely available.

Surveys have shown that most owners use boats for hunting and fishing. As a result, the hull design and equipment were maximally adapted to this task due to a wide cockpit, removable glass, as well as increased static stability. Thanks to the small blockages of the sides, as well as the flat-bottomed shape, it was possible to solve the problem of cross-country ability on shallow rivers and lakes. And due to the reinforced transom, the permissible engine power increased from 12 to 25 hp.

The production of the MKM motor boat was launched at small shipyards thanks to simpler assembly technology. Motorcycle boots were produced according to a single project in Yaroslavl and Kharkov, as well as in Astrakhan at the Red Barricades plant. Therefore, it is popularly known as “Yaroslavka”, “Kharkovchanka”, “Astrakhanka”. Hence all the disputes between owners regarding the bend of the bottom at the stern. Some models have it, while others do not. Instead of installing a transverse step, the plant attempted to change the profile of the vessel. As a result, curved boat models appeared.

Video of the MKM boat:

https://www.youtube.com/watch?v=BtoTZ8i5LtU Video can’t be loaded: Review of the MKM boat, all the pros and cons (https://www.youtube.com/watch?v=BtoTZ8i5LtU)

Characteristics table

The technical characteristics of the modernized metal boat do not imply its sports use.

Appearance and design features

The boat is made of D 16AT duralumin using riveting and consists of 6 frames holding the stringers. Sharp chine planing contours, along with a high chine, soften the impact of the bottom on ripples. To reduce the resistance exerted by the rivets, hardware with a barrel-shaped head was selected. Between the sixth frame and the transom, the aft compartment is closed on top with sliding lids and is locked. It is designed for storing PM and is separated from the cockpit by a hygroscopic partition. There is a cutout for fastening the PM. There are bulges on the floras of the first and second frames for a tighter fit of the skin.

The buoyancy reserve is distributed into two air-sealed compartments: in the stern (90 l) and at the bow (168 l). Between the bow frames there is a trunk with a lockable lid in the bulkhead. The bottom and deck have a thickness of 1.5 mm, and the side walls are 1 mm. For the MKM boat, the stationary windshield turned out to be inconvenient, because during fishing it made it difficult to pass under overhanging tree branches and low bridges. Therefore, it was decided to make it removable. Fastening was carried out with 20 screws. As the developers wanted, the characteristics of the MKM boat are excellent for fishing on quiet ripples and family walks.

Scheme

Equipment and accessories

• Three cross banks
• On the bow bank there are two seats with reclining backs
• Windshield
• Wooden slatted floorboards
• Oars
• Scoop

Habitability

To reduce the cost of the boat, the awning was removed from the package, but in vain. Water rolls over the bow and windshield and floods the cockpit. If you manage to avoid such a situation, the driver at the tiller still receives his share of splashes. Therefore, when purchasing this watercraft, it is advisable to purchase or sew an awning. Astrakhanka is stable, but boarding passengers in the absence of a pier is difficult, since they have to walk from the deck through the windshield with wooden can seats. It's easy to slip and get injured. This can be treated by installing a windbreak gate.

The living space is spacious. Having removed the cans, the three of us can spend the night in sleeping bags. However, it is worth remembering that Kharkovchanka does not like crests larger than 25 cm. If the reservoir is characterized by rapid weather changes, it is better not to risk it. Astrakhankas are very convenient for fishing, because there is enough space inside. There are no elements to which the gear clings. You can lean on the side without fear of overkill. At big catch this is an irreplaceable quality.

Two spacious lockers provide protection for luggage from moisture. Since they are locked, the vessel does not need to be unloaded when transporting on a trailer. This reduces the time of descent and delivery to the garage after rest. Moreover, the trunks are spacious, allowing you to take with you all the necessary gear, personal protective equipment, etc. without losing useful space in the cockpit. The two bow seats are equipped with reclining backrests. This is convenient when fishing because passengers can quickly turn around and control gear. It is difficult to clear the propeller of algae due to the fact that the aft air compartment has insufficient volume; the stern sags when trying to reach the blades.

Transporting a boat

Since the weight of Yaroslavka without PM is 132 kg, it is suitable for transportation on the trunk of a car, provided that its dimensions do not protrude more than 50 cm in dimensions. At the same time, loading Yaroslavka alone onto the roof of a car is difficult if there is no automatic loader in the form of guides with a winch. Still, it is better to transport this watercraft on a trailer in accordance with the rules of the Civil Traffic Regulations. The running awning and the transport awning reliably protect the cockpit during transportation and descent.

Unsinkability

Buoyancy reserve is provided by air-sealed compartments with a total volume of 258 liters (90 at the bow, 169 at the stern). Unlike polystyrene foam, air chambers are not afraid of gasoline and do not get wet. At the same time, in the event of a breakdown, they are not able to perform their function. The thickness of the bottom and deck is 1.5 mm. Therefore, she is not afraid of erasing the keel. The boat is strong and durable. According to the characteristics of the MKM boat, the watercraft must remain in a horizontal position when filled, ensuring the safety of four passengers afloat holding on to the boat.

Static stability is high. You can calmly sit down, stand in full height on board without fear of heeling. One of the rare designs that allows you to fish from the bow deck. At the same time, longitudinal stability remains to be improved. In 1967, the first tests were carried out at a ridge height of 30-50 cm and showed that with the Moscow PM and a team of 4 people.

The surface of the hull protruded 25 cm from the upper edge of the cutout for the internal combustion engine when fully loaded in calm water. To reduce risks, it was decided to install a waterproof bulkhead in the engine compartment. However, this measure did not give the desired results. An automatic scupper came to the rescue. Stability turned out to be high level. This has been proven by practical tests. Three out of four passengers sat on the edge of the deck. At the same time, its surface part rose above the water surface by 20 cm. If one person stood on board, no flooding or capsizing was observed.

Longitudinal stability was measured on a Whirlwind weighing 47 kg. When installing it, two passengers stood in the engine compartment. As a result, there was 10 cm to the water from the upper edge of the transom cutout. Unsinkability was tested through flooding with the replacement of the PM, instead of which a steel plate weighing 60 kg was used. The stern was under water, the stem protruding 20 cm remained on the surface. If the ballast moved to the side of the stern, positive stability was maintained without heeling.

The air volume in the compartments was sufficient to hold one person while standing on the deck. With a freeboard height of 6 cm. Due to the given characteristics of the boat, it was often used by rescue stations (when removing a person from a body of water, the ship maintained balance and guaranteed the safety of the crew).

Ride quality

On the move, at a heading of 0-45 degrees against the swell, strong splashing is observed. It grows well on the ridges. However, it is not in vain that the boat can be used at a wave height of 25 cm, because otherwise it will get buried by its bow. At full engine speed the shocks are felt, but not as much as on the Kazanka. To reduce splashing, it is enough to increase the number of passengers. With a heading of 90 degrees, the rolling is smooth, Astrakhan behaves steadily. A passing wave does not splash the stern, the internal combustion engine remains dry. At a speed of 15 km/h when turning to the right, the diameter of the circulation is 8 m, to the left - 10 m. In this case, the roll is 3°. Braking: 20 m in 30 sec. until it comes to a complete stop.

Tiller control of a boat with a 4-meter hull is inconvenient, because the driver does not see the sunken snags. It is advisable to install a remote control, which you cannot do without if you have an awning, since the protective fabric further narrows the view. Excessive engine power leads to the fact that the motorboat buries itself in the wave and has a tendency to capsize. What does not happen with permitted PM. Thanks to the light weight, as well as the low deadrise of the low bottom, it easily passes through difficult shallow areas covered with reeds. It’s quite possible to load it onto a trailer alone and drag it across the shallows.

Since the assembly was carried out not at an aviation enterprise, but at small shipbuilding plants. As a result of the rivet steel weak point, because they become loose on the move from impacts. Therefore, you need to periodically check the quality of the seams. To do this, just whitewash the outside of the boat with chalk and pour a small amount of liquid into the cockpit. The chalk coating will immediately show where there are leaks, even if no drops are visible. According to owner reviews, it is safer and more convenient due to the wide body and almost flat bottom. When properly stored, Yaroslavka is resistant to corrosion.

It reaches glide at 12-horsepower Veterok with two passengers. Four is already too much. The advantage of Kharkovchanok and Astrakhanok is that, given their dimensions, they confidently run under low-power engines. This provides significant savings on fuel. When trying to install the remote control, owners are faced with the fact that the torpedo is not initially installed. You have to resort to tuning. True, for recreational activities with pucks and skis, it’s worth looking for another option. Astrakhan cars are designed for a quiet ride and a calm walk.

The debate continues about the presence of deflection in the aft part of the bottom. Some owners say that it is, others say that it is not. This is due to the fact that production was carried out at three factories. Initially, the deflection was supposed to press the stern to the water for easier access to planing. However, in practice it leads to a decrease in speed and yaw. Back in Soviet times, craftsmen proposed a solution to this problem in the form of a transverse step. When installing it, the wetted area is reduced, cornering control is improved, it is easier to glide, and Astrakhanka runs faster than before the tuning.

Why are Yaroslavkas good?

• Soft move
• In the wind the windage is invisible
• You can stand across the current
• It is convenient to fish with nonsense. They don't cling to anything, because... the body is completely open
• Shallow draft

You should not go out to sea on them, as well as on reservoirs, where a sudden change in weather may cause storms with crests higher than 30 cm. For this reason, the recommended distance from the shore is only 1 km.

Speed ​​table

Test result at a distance of 500 m under the Moskva engine

Comparative analysis of Johnson and Tohatsu motors

Comparative analysis of engines Neptune-23, Whirlwind-20, Mercury 25, Tohatsu (Nissan) 18

Under the motor

Comparing engine descriptions, we can say that it is more profitable to use Tohatsu, since it consumes a minimum amount of fuel. However, domestic models cost an order of magnitude less and are cheaper to maintain. The safety margin of the MKM transom cannot withstand excess power and is prone to cracking. And since AMG cannot be welded, repair work can only be done through rivets.

Under Whirlwind 30 at maximum load, the Yaroslavka's contours begin to work as expected. If the PM is weaker, the wave passes not through the nose, but through the bottom, breaking the rivets. It is better to slow down gradually. Over 32 km/h driving becomes extreme character, therefore it is not recommended to exceed the recommended value. With a power of 25 hp. reaches glide with a load of 300-400 kg. Doesn't like sudden maneuvers. A hull with a low deadrise bottom begins to lower its bow and dig as speed increases. When adding gas, Yaroslavka will not run faster.

Under the oars

For rowing, the backrests of the front seats are removed. The oar stroke is soft. the sub-clasps are located between 2 and 3 sp. For quiet running, it is advisable to use plastic gaskets that reduce noise from friction of metal parts.

On the wave

With crests over 30 cm it yaws, and with crests up to 50 cm it burrows into the water, flooding the cockpit. When there are strong ripples, the engine runs at full throttle to avoid diving. Smooth ride only on calm water. Splashing is observed at 50 cm ridges, and at 30 cm, beating is felt, especially on the front banks. By modernizing the hull and equipping it with a transverse step, the situation improves.

Prices

Prices for the boat “MKM” on Avitorange from 20 to 425 thousand rubles. Assortment presented directly on Avito , not rich. This indicates that used sales Gliders of this class are rare, the owners do not want to part with their watercraft. Price different, representatives of any social strata will be able to choose a good option for themselves.

Duralumin release motorboats "MKM", designed by the Yaroslavl Shipyard, was started in 1968 at several shipyards. Due to its higher stability, hull strength and freeboard height, this boat was supposed to replace the Kazanka-type motorboat, which turned out to be insufficiently safe when installing outboard motors with a power of over 12 hp. With. At the same time, the hull design and equipment of the boat were made similar to the Kazanka, the only standard industrial motorboat made of light alloys produced in the USSR at that time. The prototype for the theoretical drawing was the MK-29 motorboat, which has flat-keeled bottom contours with a low deadrise and a slight slope of the sides inward at the transom.

General location of the MKM motorboat

The body is of riveted construction made of D16AT duralumin, the set parts are stamped from AMg5M aluminum-magnesium alloy and duralumin profiles. The thickness of the bottom and deck plating is 1 mm. The framing system is mixed with six frames and longitudinal stringers along the bottom. The forepeak and engine compartment are separated from the cockpit by watertight bulkheads. When parked, an outboard motor can be placed in the engine compartment and the compartment is closed on top with metal covers. The forepeak with a volume of 168 liters together with a 90 liter sealed box under the stern can provides.

The boat is equipped with three transverse banks, a windshield, and wooden slatted slats. The two bow seats are equipped with reclining backrests. Below the deck in the bow there is a small trunk with a lockable lid in the bulkhead. Operation of the boat is allowed at a wave height of up to 0.25 m and a distance from the shore of up to 1000 m. When sailing in rough seas, the boat gets heavily splashed due to the low deadrise of the bottom, the low location of the chine in the bow and the absence of bilge splash guards. Due to the existing downward bend of the bottom at the transom, the MKM buries itself in the wave and tends to tip over the chine. To eliminate these shortcomings, consultants from the magazine “Boats and Yachts” recommended the installation of bilge splash guards and a transverse step. The plant made attempts to organize the production of deckhouses for the MKM motorboat, but things did not go further than prototypes. The MKM boat can be recommended for fishing with motors of the Moskva and Veterok types and for walks with more powerful motors.

In general, the MKM boat turned out to be unsuccessful. Its seaworthiness and operational safety are no better than those of the Kazanka. In addition, “MKM” does not have any “zest”, i.e., any positive qualities, which would allow, under certain operating conditions, to give preference to the MKM over other boats.