Soviet motorboat Progress 4 It is one of the most widely recognized models in the history of domestic small shipbuilding. Although production of this boat was discontinued at the end of the last century, it is still actively used by fishermen and water lovers throughout the country.
Many owners are wondering about the real possibilities of this “workhorse” of water bodies, especially in comparison with modern analogues. specifications of the boat Progress 4 It's a big part of its popularity, because it's roomy enough for three people and it's very stable, but like any technology, it has its own design features that you have to take into account when you buy it or you use it.
In this article, we will take a look at all the technical parameters, weight specifications and nuances of the management of this legendary vessel, you will learn why the aluminum hull requires a special approach to maintenance and how to choose the right engine for optimal speed.
History of creation and design features
Development of the motorboat began in the 1960s at the Kuibyshev Aviation Plant, which later became known as the Progress Plant, with the task of creating an affordable, mass-produced and durable vessel for a wide range of users, and the resulting model, which received the designation of the "Progress" Progress 4The main material was the AMg5M alloy, which has a high corrosion resistance.
The boat's hull is riveted, which was standard, but today it's a debate about the tightness of the seams, and it's designed with advanced zygomatic nozzles that significantly increase wave stability. Aluminum case has smooth contours, which has a positive effect on driving performance, but requires accuracy when mooring to the concrete walls.
Interesting fact about production
During peak production, the plant produced thousands of boats a year, and the shortage persisted for decades. Now you can't find a new Progress 4, the market is only used models.
The design was very versatile, and the boat was originally designed to be outboard, but it also allowed for low-power cockpit trunks, and the interior space is divided into several compartments, which adds safety, and even when completely flooded, the cockpit doesn't sink, but it stays afloat thanks to the built-in buoyancy blocks.
Dimension, weight and load capacity
One of the key parameters for any waterman is the ratio of the size of the boat and its weight. Progress 4 These numbers are a compromise: the boat is big enough for a comfortable fishing trip, but still transportable on the roof of a passenger car, the full length of the hull is 4 meters, and the width on the midsection is 1.51 meters, which allows you to feel confident even in a slight wind.
The body with the equipment weighs about 140-150 kg, depending on the configuration and year of production, which means that it will require the efforts of two people or the use of a special trolley to transport it by trailer or drag. Load capacity The model allows you to take on board up to 400 kg of payload, including passengers, engine and equipment.
| Parameter | Meaning | Unit of measurement |
|---|---|---|
| Longest length | 4000 | mm |
| largest width | 1510 | mm |
| Height on midship | 500 | mm |
| Mass of the hull with equipment | 145 | kilogram |
| Load capacity | 400 | kilogram |
It is important to consider that the actual payload may decrease due to the weight of the equipment installed, such as anchors, additional tanks or heavy batteries. The distribution of weight along the cockpit also plays a critical role. Incorrect centering can lead to differentiation on the nose or stern, which will impair handling.
Capacity of the cockpit and layout
Interior space Progress 4 The layout includes two rundoos (nose and stern), a central bank and two side seats. The nose rundoodle is often used to store anchor property and dry things, while the aft compartment is ideal for housing a fuel tank.
The banks are made of the same aluminum alloy and are reinforced, removable, allowing you to free up space if necessary to accommodate large cargo, such as bags with catch or tourist equipment. Cockpit layout It is designed to provide maximum visibility and ease of control of the motor.
However, the space between the banks is limited, especially if there are large fishermen on board, and the comfort of three adults requires a certain skill and minimization of personal luggage, while for two, this boat provides simply luxurious conditions with a margin of space.
⚠️ Warning: Don't overload the bow with heavy gear. Shifting the center of gravity forward can cause the nose to bury in a wave on the move, which is dangerous by flooding the cockpit with water.
Driving and seaworthiness
On the water. Progress 4 It's a stable and predictable vessel, and because of its zygomatic nozzles and moderate bottom keeliness, it's a good course, and it's a gentle wave, and it's not prone to yaws, which is especially important when fishing in windy weather, but because of the flat bottom of the bow, it can have high-speed shock wave.
The optimal speed is 20-25 km/h. When going out on the plane with one person on board the boat behaves steadily. With a full load, getting on plane can be difficult without a sufficiently powerful engine. Seaworthiness The model allows you to go to open areas of reservoirs when turbulent up to 0.5 meters, but further exit into open water is not recommended due to the low height of the board.
To improve driving performance and reduce shock wave experienced owners recommend installing transom plates or hydrofoil on the lower unit engine.
The steerability in corners is satisfactory, but it requires habituation. Because of the considerable length and flat bottom, the radius of circulation can be large. When the steering wheel is shifted at high speed, there is a risk of rollover, especially if passengers are displaced on one side. Therefore, maneuvering must be smooth and prudent.
Power plant: choice of motor
The manufacturer recommended using outboard motors with a capacity of 10 to 30 hp The most popular and optimal option for Progress 4 It is considered a motor with a capacity of 15-20 hp This engine allows you to confidently lead the boat to the plane with two passengers and provides a cruising speed of about 25-30 km / h.
Motors less than 10 hp are possible, but in this case the boat will operate in displacement mode, which significantly increases fuel consumption per kilometer and reduces maneuverability. Motors over 30 hp are not recommended for installation due to the design limitations of the transom and the risk of loss of controllability.
- 🚤 Minimum power: 5-8 hp (only for quiet movement in displacement mode).
- ⚡ Optimum power: 15-20 hp (confident getting on plane, good dynamics).
- 🚫 Maximum power: 30 hp (exceeding can be dangerous for the design of the transom).
Heavy four-stroke engines can significantly change the differentiation of the boat, shifting the center of gravity on the stern, requiring the redistribution of cargo or passengers closer to the nose for balancing.
The middle ground for Progress 4 is a 15 hp two-stroke engine that provides the best balance between speed, fuel consumption and handling.
Service and possible problems
Despite its legendary reliability, most surviving specimens are age-appropriate, with the main enemy of the aluminum case being electrochemical corrosion, which occurs when in contact with other metals in salty or contaminated water. Regular inspection of the transom and bottom for cracks and oxidation of the seams is a must.
Another common problem is the depressurization of rivet joints. Over time, vibrations and shocks to the wave can lead to microcracks around rivets. To eliminate leaks, a complete bulkhead of the seams is often required with the replacement of the fastener and the use of special sealants. Maintenance It also includes checking the condition of the scallops and scallops.
☑️ Seasonal boat preparation
⚠️ Warning: It is strictly forbidden to use steel rivets or bolts to repair the case. Contact of steel with aluminum in water causes instant and severe corrosion, destroying the material around the fastener.
Owners should also pay attention to the condition of deck deck and wooden elements. Wood in constant moisture is prone to rot, so it must be treated with antiseptics in a timely manner or replaced with modern moisture-resistant materials such as plywood FF or composites.
Comparison with analogues and final conclusions
Compared to modern PVC boats or newer aluminum models, Progress 4 It's a great advantage in terms of durability and maintenance in the field, and it's almost impossible to prick with a snag or stone, making it an ideal choice for shallow and overgrown bodies of water, but it's a poor choice in weight and transportation.
Compared to other metal boats of the period, such as Kazanka or ObProgress 4 often benefits from the interior layout and spray protection of the cockpit, the higher sides and the developed cheekbones make it more seaworthy, but it also tends to weigh more than its competitors.
In summary, it can be said that Boat Progress 4 It's a boat for a serious angler who's willing to put up with weight for safety and sustainability, and if properly maintained, it's going to last a generation of owners.
What is the real speed of the boat Progress 4 with a 15 hp engine?
With one driver, the speed can reach 28-30 km / h With two passengers, the speed decreases to 22-25 km / h With a full load, the boat may not go to the plane, moving at a speed of 15-18 km / h.
Can I install an electric motor on Progress 4?
Yes, it is possible to install an electric motor, but due to the large weight of the boat and the resistance of the hull, the battery life will be limited.
Do I need to register the Progress 4 boat in GIMS?
Yes, the weight of the curbed body Progress 4 is about 145 kg, which exceeds the threshold of 200 kg (including the engine weight will definitely exceed 200 kg).
What material is best for repairing holes?
The best way to repair holes is to use patches from the same AMg5M or AMg6 alloy. Alternatively, you can use an AMz alloy, but it is less durable. It is important to use argon welding to get a quality seam.