The domestic motor boat "Oka-4", the technical characteristics of which will be discussed later, was produced by the Gorky Aviation Plant. This ship has undergone many structural changes before serial production. On the fourth attempt, a swimming facility with a keeled bottom of fourteen degrees and reinforced casing was put into production.
Description
The body is made of aluminum by riveting. The boat “Oka-4” has not the best technical characteristics in its segment. The thickness of the outer skin is only 2 mm. Fodder and bow blocks filled with foam are responsible for unsinkability.
The boat is equipped with a folding removable awning and steering. There is a windshield and soft seats. Roomy lockers are located under the seats, the luggage compartment is protected from splashes due to the presence of a fence on the bow deck.
A pair of fuel tanks is freely placed in the under-engine part. Outboard motors are used as power units. Cockpit dimensions - 2120/1340 mm. In serial production, three modifications of the brand in question are known:
- Standard equipment weighing 190 kg.
- Version with hard seats weighing 171 kg.
- Option with durable cans without backs (152 kg).
Boat "Oka-4": technical specifications
Models of the vessel under consideration with a minimum configuration are much cheaper, which leads to the popularity of such modifications among various segments of the population. Below are the main parameters of the technical plan:
- The maximum length is 4.25 m.
- Width / height - 1.48 / 0.77 m.
- Kilovost - 14 degrees.
- Transom in height - 38 cm.
- Curb weight - 190 kg.
- The carrying capacity is 400 kg.
- The passenger capacity is four people.
- The maximum power of the outboard motor is 30 horsepower.
- The speed at full load on the power unit "Whirlwind-M" (25 "horses") - 30.4 km / h.
Significant pitching of the bottom ensures that the Oka-4 boat will demonstrate good seaworthiness when navigating large rivers and in the coastal zone of marine reservoirs. In addition, this tool proved to be excellent in shallow and calm reservoirs.
Benefits
The considered floating vessel can be operated with the Neptune-23 outboard engine. This is quite enough for normal planing with a crew of four and a weekly supply of provisions. The good seaworthiness, which was shown by the motor boat "Oka-4", allows you to overcome the excitement on the water up to two meters. If we compare the ship with a similar class "Kazanka-2", the latter is inferior in almost all respects.
The fourth "Oka" has a very good layout, roomy lockers, a solid bottom and comfortable seats. The lattice flooring consists of compact wooden sections, which allows them to be easily dismantled, increasing the space for storing goods without loss of deadweight.
If desired, you can install additional metal containers for fuel. This allows you to overcome significant distances without special refueling. A flat-bottomed recess is placed on the sides of the honey, two standard gas tanks hold 20 liters of fuel. At the same time, the smell of gasoline is not felt in the cockpit due to the design features of the boat. Things especially exposed to moisture are placed under the bow deck, and equipment and tools are located as conveniently as possible, do not occupy a useful place in the cockpit.
Exploitation
According to reviews, after several seasons of operation, a problem often arises with the power unit and the output of the craft for planing. Alternatively, you can install a pair of "Whirlwind" or a power plant "Hi-22", which is more economical in terms of fuel consumption. The boat "Oka-4", the technical characteristics of which are presented above, is designed for the maximum power of the power unit within 30 horsepower.
The twin-engine installation allows you to achieve speed advantages and stability in troubled water. If you strengthen the transom, it is quite possible to equip the vessel with a power plant with a capacity of about 45 "horses". In terms of seaworthiness, the vessel under consideration shows good safety parameters at a speed of 40 km / h (full load). The durability of the case is tested by time and test tests, it withstands impacts of decent strength, without deforming. For those who want to save a little on fuel consumption, experts recommend aggregating the Neptune and Moscow engines in pairs. This allows you to go on planing at a load of 400 kilograms at a speed of about 30 km / h.
Minuses
The boat "Oka-4", the photo of which is presented above, has several disadvantages. The main disadvantage is the susceptibility to corrosion of parts of a longitudinal set. This applies to the tablet, stringers and longitudinal reans, as well as the seatbacks. Elements are made of a usual angular profile, without additional processing from rusting.
As a result of this decision, duralumin could delaminate like wet plywood, and, according to the owners of the craft, the process did not take long. As a preventive measure, it is necessary to constantly clean up problem areas, otherwise corrosion quickly destroys the elements, which then simply have to be replaced with new analogues.
“Oka-4” is a boat (reviews are given below), which has another significant drawback. This is a strong spray when driving in the opposite direction when the wave. Since duralumin profiles riveted on the outside play the role of longitudinal redans on the boat under consideration, the corners split the oncoming stream into small sprays that are thrown forward and are directed to the windshield by the wind. At the same time, the protection of the bottom and sides does not cope with them, which leads to the ingress of water on the deck and in the cockpit. Despite this structural feature, the ship in question received the best seaworthy and speed characteristics compared to its closest competitors.
Features
"Oka-4" - a boat whose characteristics are discussed above - is equipped with a windshield without triangular sidewalls. This feature contributes to the fact that the person sitting in front is not protected from flying splashes. To mount additional protective elements yourself is quite realistic. But for this it is necessary to find high-quality plexiglass, as well as adapt mooring ducks. In the standard version, a molded handle of the knits type is used, which fixes the glass.
Certain disadvantages are noted in the layout of the cockpit. In order to get into the engine compartment, the driver will need to step over the transverse front seat. For an overnight stay, you can decompose the seats by moving the backs and covers, which is a rather time-consuming and lengthy process.
Consumer Reviews
So, above we talked about the technical characteristics of the Oka-4 boat. Owner reviews suggest that in general consumers are satisfied with the craft. Firstly, the vessel has good seaworthiness and speed. Secondly, it is durable and resistant to waves. In addition, the boat has a good load capacity and the ability to use various outboard motors with a capacity of up to 30 horsepower.
Among the minuses, users note a high susceptibility to corrosion of certain elements and the spatterability of the passenger part. However, in combination with an acceptable price, the boat in question is quite competitive in comparison with other analogues that have not such high strength and reliability indicators (Moscow, Dnipro, Kazanka).
In conclusion
The boat "Oka-4", technical characteristics, the reviews of which are given in the article, is a good swimming tool for fishing and tourism. It is distinguished by good seaworthy and speed qualities, although it is not without certain drawbacks. In general, the products of the Gorky Plant named after Ordzhonikidze received worthy marks from specialists and amateurs, especially in terms of combining price and quality.