Legendary Progress-4 This dural squirrel, which was mass-produced at the Nikolaev Shipyard, has been plowing rivers and lakes for decades, and is valued by owners for its time-tested design, spare parts availability and repairability, making it relevant even half a century after production began.
Understanding the exact Technical specifications of the boat Progress 4 Not only is it necessary to buy a used vessel, but it is also necessary for the right engine selection, load calculation and safe operation. Despite its simplicity of design, this boat has a number of nuances that affect its performance and safety. In this article, we will discuss in detail the dimensions, weight, materials and design features that distinguish this model from competitors.
History of creation and features of the construction of the body
Development of the motobodine began in the early 1960s, when engineers were tasked with creating a mass-produced, reliable and inexpensive vessel for a wide range of consumers. dyraluminumThis was a very strong, relatively light weight riveting technology used in assembly, which allowed for the creation of sealed joints that were resistant to vibrational loads that occur when the engine was running.
The contours of the hull are designed to fit the specifics of the inland water bodies, the silky shape of the bottom in the nose provides good germination on the wave, and the flat cheekbones contribute to the rapid exit to planing. Progress-4 It's not without its disadvantages: a narrow transom and the absence of a brightly-lined zygomatic bend sometimes leads to yaw at high speeds. forward-looking.
⚠️ Attention: Duraluminum is susceptible to electrochemical corrosion when in contact with other metals in salt water. Do not use steel bolts or copper elements in a structure without insulation.
The design includes two sealed buoyancy boxes and a bow trunk, and the bulkheads that separate the compartments add rigidity to the hull and prevent the entire boat from sinking when one of the compartments breaks. modularity This allowed the model to stand on the conveyor for more than 30 years.
Overall dimensions and weight parameters
It is critical for a potential owner to know the exact dimensions of the vessel, especially if it is planned to be transported on the roof of a passenger car or stored in a garage. Boat length Progress 4 It is 4 meters exactly, which is the optimal size for accommodating 3-4 people with minimal discomfort, and the width on the midsection is 1.49 meters, which provides sufficient stability in the parking lot and when driving.
The weight of an empty boat without motor and equipment varies from 140-145 kg. This is a rather heavy figure that requires the mandatory use of a trailer for transportation or the presence of a slip for launching. Mass of the boat in service with the installed engine and full tank can reach 250 kg or more, which must be taken into account when calculating the load capacity of the trailer.
| Parameter | Meaning | Note |
|---|---|---|
| Longest length | 4,000 mm | With transom in mind |
| largest width | 1490 mm | Midel-spangout. |
| Height of board | 500 mm | Midle. |
| Body weight | 145 kg | No motor. |
| Load capacity | 400 kg | Including people and cargo |
The 50 cm height is a compromise: on the one hand, it provides protection against splashes, on the other hand, it reduces sailing, but when fully loaded, the board can be quite low above the water, which requires caution in choppy conditions.
⚠️ Warning: Passport load capacity exceeding 400 kg critically reduces freeboard height and can lead to flooding.
Capacity and layout of the cockpit
Interior space Progress-4 It's designed quite rationally for boats of this class, and the passenger capacity is officially declared as 4, but it's best for two or three people with equipment, and the seats are designed as haunches on the sides, so you can use them to store things, life jackets or fishing gear.
The floor of the cockpit is flat, making it easier to move around the boat, but requires the use of additional mats, as the aluminum is slippery, especially wet. The nose trunk of about 100 liters is closed with a sealed lid and is ideal for storing dry things, documents or navigation equipment. Cockpit layout It allows you to install rotary chairs, which turns the boat into a full-fledged pleasure boat.
It is important to note the presence of a self-draining cockpit, although its effectiveness depends on the condition of rubber stoppers in the drainage holes, and regular inspection of these elements is a guarantee that the boat will not gain water during rain or when mooring.
Engine installation and driving performance
The boat is designed for operation with outboard motors with a capacity of 20 to 50 hp The optimal option is considered to be 30-40 hp motorThe boat's sleeve is a powerful engine that allows the boat to go smoothly even when fully loaded, and the boat's sleeve is reinforced and designed to fit short-dadewood engines.
With a 30 hp engine. Progress-4 It's about 35-40 km/h with one or two passengers. With a more powerful engine (up to 50 hp), the speed can reach 45-50 km/h, but the fuel consumption and load on the transom increases disproportionately. The driving performance is characterized by moderate softness, but on the oncoming wave the boat can significantly slap the bottom if not selected the right differentiation.
To improve driving performance and reduce slapping on the bottom of the wave, install transom plates or hydrofoil on the lower unit engine on the cheekbones.
The fuel tank is usually located in the nose or aft funduk, and its capacity is about 20-25 liters. This reserve is enough for about 2-3 hours of active operation of the engine at full gas, which should be considered when planning long-distance exits.
Materials, corrosion and durability
The main material of the case is duraluminium D16AT. It is a durable and light alloy, but it requires careful attention. duraluminium It's corrosion, especially in riveted joints and welds, and over time, the fabrication can break down, and the metal begins to oxidize.
Special attention should be paid to the condition of riveted seams. Vibration and impact loads can lead to loosening of rivets, which leads to the appearance of microcracks and leaks. Regular inspection of the bottom and treatment of problem areas with special primers and paints for boats is a mandatory procedure for prolonging the life of the vessel.
How do you prolong the life of duraluminium?
Periodically (every 2-3 years) it is recommended to carry out a complete stripping of the bottom to metal, etching and applying epoxy soil, which will create a reliable barrier between water and metal, preventing electrochemical corrosion.
Term of service Progress-4 And if you take care of it, it can be over 30 or 40 years old, and many of the ones that were built in the '70s are still in service, which means that the structure is very robust.
Modernization and tuning of boats
Owners often resort to modernization Progress-4A popular improvement is the installation of windshield and a tenttop, which allows the boat to be used in all weather, and the standard hazelnut seats are often replaced with soft seats with adjustments.
Another common type of tuning is the reworking of the bow to install an electric motor or additional anchor equipment. Some enthusiasts reinforce the transom with steel sheets or install a keel to increase the strength of the stern when operating with powerful motors.
☑️ Checklist before buying b/u Progress-4
Do not forget about safety: the installation of navigation lights, high-quality railing racks and anchors significantly increases comfort and safety of operation. Installation of a stationary sonar and GPS-navigator It turns an old boat into a modern fishing tool.
Comparison with analogues and final conclusions
In his class. Progress-4 Compared to Kazanka, the progress is better in comfort with higher sides and a nose trunk, but loses weight and dimensions, making it difficult to transport. Ob-3 is lighter and more compact, but less stable on the wave.
The main advantage Boats Progress 4 It's a workhorse that's not afraid of hitting rocks, that's easy to repair in garage conditions, and that's relatively inexpensive in the secondary market. For anglers and hunters who value reliability over speed, this is one of the best choices.
Progress-4 is a balance between strength, capacity and affordability, ideal for those willing to put up with excess weight for reliability and proven design.
To sum up, despite its age, it has not lost its relevance, and its proper operation, timely repairs and proper modernization allow it to remain in service and delight owners with pleasant walks on the water.
What is the maximum weight of the engine to be put on the Progress-4?
The engine is officially recommended up to 50 hp Installation of a more powerful engine (up to 60 hp) is possible only after strengthening the transom and subject to experience in management, as the boat can become unstable at high speeds.
Do I need to paint the bottom of Progress-4 with antifouling?
If you operate a boat in salt water or in water with high biological activity, antifouling paint treatment is desirable, but for fresh water bodies in the middle of Russia, this is often not urgently needed, enough high-quality epoxy coating.
How many people can be safely on the boat?
Passport capacity is 4 people, but for comfortable fishing or cargo walks, it is safer to limit yourself to 2-3 adults, exceeding the number of people reduces the buoyancy reserve and increases the risk of flooding.
Can Progress 4 be used at sea?
The boat is classified as "M" (inland water bodies) and is designed for water bodies with a wave height of up to 0.6 meters. Outing to the open sea or large reservoirs in high winds is prohibited due to the risk of overturning and low height of the board when loading.