The question of what the real weight of the boat is Progress 4 Without a motor, it is one of the most discussed among small boat owners in the CIS. This is not just an idle curiosity, but a critical parameter for those who plan to transport a boat on the roof of a passenger car or launch it alone. Aluminum alloyThe PVC, from which the body is made, provides durability, but inevitably adds mass, which significantly distinguishes this model from modern PVC analogues.
Many prospective buyers mistakenly believe that data-sheet figures is completely true, but practice shows the opposite: the final figure is influenced by many factors: the year of issue, the presence or absence of decking, the thickness of the metal and even installed options like a windshield. The average weight of the body Progress 4 varies in the range from 140 to 150 kgThis makes it heavier than many competitors, but it guarantees stability on the wave.
Understanding the real mass is necessary not only for logistics, but also for the right selection. outboardOverloading a transom board or overloading can lead to dangerous situations on the water. In this article, we will discuss all the nuances of mass, from dry weight to full load, so that you can make an informed decision about buying or upgrading your vessel.
Technical specifications and data-sheet figures
Official documentation from the Samara-based manufacturing plant shows specific figures that engineers and customers have been looking at for decades: According to factory parameters, the body weight without attachments and flooring is approximately 140 kg.
It is important to bear in mind that dimensions The size of the boats is very important, and the length of the boats is 4 meters and the width is about 1.5 meters, and it creates a significant surface area, which requires the use of metal of sufficient thickness to maintain the rigidity of the structure. Progress 4 It is often the subject of controversy: someone weighs the bare hull, and someone – a fully equipped boat with cans and drawers.
⚠️ Note: When buying a used boat, be sure to take into account that for decades of operation, the body could become overgrown with layers of paint, anticorrosion compounds or fouling, which will increase its actual weight by 5-10 kg in excess of the passport.
For a more accurate idea of the parameters, it is worth referring to the table, which summarizes the main data on modifications:
| Parameter | Meaning | Note |
|---|---|---|
| Maximum length | 4,000 mm | Including forespeak |
| maximum width | 1510 mm | On the sides. |
| Hull mass | 140-150 kg | No motor and no flooring. |
| Load capacity | 400 kg | Including passengers |
| Capacity | 4 people. | Recommended |
Thus, based on the specificationIt can be concluded that the transport of this boat will require a reliable trailer or a car with a high load capacity of the roof, ignoring this data can cause damage to the body of the car or create an emergency on the road.
Factors Affecting Actual Weight
Why is it that scales often show numbers that are different from factory scales? The first and foremost factor is the equipment. Progress 4 It's rare to be found naked, and owners install rundooks, deck stringers, reinforced jars, and windshields, each of which, made of aluminum or plywood, adds a few pounds to the total mass.
The second important aspect is the state of aluminum-alloy The technology may have changed slightly over the years, and using thicker metal to repair dents or reinforce the transom in artisanal conditions also weighs the structure. In addition, the residue of water in the hold, which is difficult to fully draw, can be an additional 10-20 kg if the boat has been on the water for a long time.
Effect of anticorrosion treatment on weight
Many owners cover the bottom of the boat with epoxy resins or bitumen mastics to protect against electrochemical corrosion, a layer of protection several millimeters thick across the bottom area can add 5 to 15 kg to the total weight of the vessel.
The third factor is attachments, which are often counted along with the boat when weighing: anchors, chains, life jackets, fuel tanks and tools lying in the handoos create a tangible load. transom board with a motor bracket installed on it also contributes, especially if it is reinforced with steel linings.
And there are some versions with boules that increase stability but add weight, and there are boats with already built-in control systems. remoteSo when planning transportation, always make sure you have a 10-15 percent margin of passport weight.
Comparison with modifications and analogues
To know if you weigh a lot or a little Progress 4It's a model that you have to compare to other models. Progress 2 It was much lighter, but it had smaller dimensions and worse seaworthiness. More modern PVC analogues with inflatable tubes may be easier to transport, but they lose in the strength of the body and the ability to install a powerful engine. petrol-engine.
If we consider metal analogues, such as "Crimea" or "Ob", then Progress 4 It's a mid-range vehicle, heavier than some of the "Kandaks," but lighter than a full-fledged chopping boat, which is a trade-off between wave stability and the ability to transport a passenger trailer, and by comparison, the Krym-M's hull weighs about 130 kg, making it a little more tractor-friendly, but less comfortable for a company on the thrill.
- 🚣♂️ Progress 4: Classical aluminum boat with high sides and good stability, weight about 145 kg.
- 🚤 Kazanka-5M: lighter and narrower, the weight of the body is about 100-110 kg, but less stable on corners.
- ⛵ PVC boats 4 meters: the weight of the kit (boat + floor + engine) can reach 80-90 kg, which is much lighter than metal.
So when you choose between these two, it's important to understand the purpose of the operation, and if you want a workhorse to go fishing in large reservoirs, where safety and the ability to stand up at full height are important, then weight is a big part of the game. Progress 4 If mobility and frequent recharging from place to place alone are the priority, the difference between 40 and 50 kg compared to lightweight ones will become tangible.
Transportation and towing of the boat
Transporting a boat weighing 140-150 kg requires a serious approach, lifting such a load on the roof of the Zhiguli or Lada alone is almost impossible and dangerous to health. trailerThe trailer must not only be lifting, but also have a reliable fixation system, since the inertia of the heavy aluminum body during braking is high.
If you're planning to launch a boat without a trailer, you'll need at least two people to help you, one person can carry a transom, another person can carry a nose, but over long distances, this puts a tremendous strain on the spine. There are special transport trolleys that allow you to move the boat on hard ground, but they also add weight and dimensions to the transport.
⚠️ Attention: When mounting a boat on the roof of the car, make sure that the load on the axle and roof does not exceed the permissible limits for your model car. Progress 4 has a sailing speed, which can worsen the handling of the car on the track in lateral winds.
For safe loading, homemade or factory slips are often used, allowing the boat to roll onto a trailer or roof, minimizing manual lifting. The use of winches and guide rollers greatly facilitates the process, making the boat's weight less critical at the time of loading.
☑️ Preparation for transport
Operation and load capacity
The concept of "weight of a boat" is inextricably linked to its carrying capacity. Progress 4 rated carrying capacity is 400 kg. This means that after subtracting the weight of the body itself (145 kg), the weight of the engine (up to 50 kg) and the weight of fuel with oil (20 kg), the passenger and equipment remains about 185 kg. This is about 2-3 people of medium build with a small supply of gear.
Exceeding maximum load It causes the boat to drop above the water, which is especially dangerous when it's turbulent. It can easily spill over the low side if the boat is overloaded. It doesn't sink, but the boat that draws water becomes unmanageable and can flip over at the slightest heel.
The distribution of weight inside the boat also plays a role: Passengers and cargo must be positioned evenly to prevent the different from entering the bow or stern. A shift in the center of gravity can cause the boat to yaw on the course or even tip over when turning abruptly.
To increase the payload capacity, use lightweight materials for interior decoration: plywood instead of metal for hazelnuts, lightweight plastic cans for fuel instead of metal cans.
Advice on modernization and facilitation
Can we reduce the weight? Progress 4No, not at all, because it's going to break the strength, but you can optimize the weight by getting the right equipment, and replacing heavy wooden cans with lightweight aluminum profiles or cellular polypropylene will save you a few pounds.
It's also worth revising the equipment you take on regular flights, so heavy anchors can be replaced with foldable stainless steel structures, and excess equipment can be stored at home, taking only the necessary ones. lithium-battery instead of lead starter batteries, it allows you to reduce weight in the area of the transom by 15-20 kg, which has a positive effect on differentiation.
- 🛠️ Use aluminum boxes instead of steel boxes to store things.
- ⚓ Replace the anchor-stove with a folding cat anchor or Denfort.
- 🔋 Consider installing a LiFePO4 battery to reduce weight on the transom.
Any modernization must be done wisely, and drilling extra holes in the case to install lightweight structures can lead to corrosion and weakening of the structure, which ultimately requires repair and weighting with patches, so the principle of “do no harm” is more relevant here than anywhere else.
Optimization of the weight of the boat is possible by replacing the attachments and accessories with lighter analogues, but the weight of the hull itself cannot be changed.
Frequently Asked Questions (FAQ)
Can I transport Progress 4 on the roof of the sedan?
Theoretically, you can do it if the roof can withstand a load of 150 kg (taking into account dynamic coefficients), but this is difficult because of the length of the boat (4 meters) and its weight, it will require a reliable system of mounts and the help of several people to load, it is safer to use the trailer.
Does Progress 4 Aluminum Rust Strongly?
Aluminum does not rust like steel, but is susceptible to electrochemical corrosion, especially in salt water or in contact with other metals. It is important to use anode protection and not to keep the boat permanently in water without treating the bottom.
Which motor is best for this boat?
The optimal power of the engine for Progress 4 is 15-20 hp Motors with a capacity of 9.9 hp will be weak for full loading, and motors over 25 hp may be redundant and require transax reinforcement, which again will increase the weight.
How many people can accommodate a boat according to GIMS standards?
According to data-sheet figures, the boat is designed for 4 people, but when fully loaded with people (4 x 75 kg = 300 kg) plus engine and equipment, you almost reach the load limit of 400 kg, so the buoyancy margin will be minimal.