The question of how much weighs the legendary aluminum boat Progress 4The model, which was produced in Nikolaev since the late 1960s, has become a real benchmark for reliability and accessibility, but its physical parameters require special attention when planning transportation. Hull mass This is not just a number in the passport, but a critical parameter that affects the choice of trailer, the carrying capacity of the car and even the behavior of the vessel on the water.
Many potential buyers confuse the weight of the empty hull, the mass with the installed equipment and the total mass with the crew and cargo. The difference between these values can be as much as several hundred kilograms, which radically changes the approach to logistics. weight-bearing specifications This famous "four", based on factory data and real experience of operation.
Factory specifications and body weight
The official documentation of the manufacturer (Nikolaevsky Shipyard "Ocean") gives clear figures, but in practice they can vary. Dry weight According to data-sheet figures, the value of the case without attachments is 145 kg. This value is relevant for standard equipment without additional options, which are often installed by owners themselves during operation.
It is worth considering that the aluminum from which the body is made (amg5 or amg5m alloy), has the property of accumulating oxides and overgrowth, which over time can slightly increase the weight, although insignificant. More importantly, the real weight of a particular instance, especially used, can differ from the factory by 5-10 kg in the upward direction due to the installed additional fittings, welded boxes or reinforced transom.
Dimensions of the vessel It's 4.5 meters long and 1.6 meters wide, making it wide enough for its class, and it's a geometry that provides great stability, but it increases sailing and weight compared to narrower ones like Kazanka 5M.
Why is the weight different from the passport?
The weight of the real instance often exceeds the factory due to the installation of a more powerful transom for an outboard motor of greater power, welding rundukes, liner racks or laying on the bottom of an additional layer of plywood for floor rigidity.
Effect of the engine on total mass
When planning transportation on the roof of a car or trailer, you can not ignore the weight of the outboard motor (outboard motor). Progress 4 Historically, the Whirlwind, Neptune engines were used, and more recently, the imported Yamaha, Tohatsu and Mercury engines, and the weight of the power plant directly affects the load on the rear axle of the trailer and the transom of the boat.
For example, the popular engine "Whirlwind-30" weighs about 52 kg, while modern four-stroke engines with a capacity of 30 hp can reach 70-75 kg. If you plan to operate a boat with two engines (paired installation), which is sometimes practiced by enthusiasts to increase speed, the total weight on the transom doubles, which requires mandatory reinforcement of the aft part.
C. (for the Progress-4M modification) or 25 hp for the early versions. Exceeding this limit is not only dangerous, but also leads to overloading of the transom, which is designed to be loaded. Installing a too heavy motor can shift the center of gravity, making the boat prone to burrowing nose on the wave.
- 🚤 Whirlwind 30: The classic two-stroke engine, weighing about 52 kg, requires a mixture of gasoline and oil.
- 🌊 Tohatsu M30D2: Modern four-stroke, weighing about 76 kg, reliable, but heavier than its predecessors.
- ⚓ Yamaha 30HMHS: Weighs about 64 kg, has a good traction and resource.
When transporting, always remove the motor from the boat, if possible, and this will not only reduce the weight of the trailer, but also save the transom from vibration loads on the road.
Transportation: trailers and vehicles
Transportation Progress 4 Given the weight of the hull of 145 kg, plus the engine (50-70 kg), plus the gas tank, anchor, life jackets and other supplies (about 30-40 kg), the total weight on the trailer can reach 250-260 kg. To this you need to add the weight of the trailer itself, which for such a boat should be reinforced.
For legal transportation, you will need a category B trailer, but it is important to keep track of the total mass of the road train. traction It can be limited to 1,200-1,400 kg, which leaves a small margin. Owners of small cars with thrust up to 800 kg will have to be extremely careful with loading.
When loading the boat onto the trailer by dump truck or by winch, the distribution of weight along the axes of the trailer should be uniform. Reversed center of gravity can cause the trailer to wag on the track, and too much forward displacement can cause the vehicle's coupling device to overload.
Comparison with analogues: Progress-4 or Kazanka?
A frequent question for beginners is: which is heavier, Progress-4 or Kazanka-5M? Comparative analysis shows that Kazanka-5M weighs about 150 kg in standard design, that is, almost identical to Progress. However, Kazanka-5M2 already weighs about 160 kg due to the more powerful transom and dural decks.
The main difference lies in the design of the bottom. Progress It has sharper cheekbones and a deep “V”, which makes it better on excitement, but requires a more powerful motor to go full load plane. KazankaHaving a flatter bottom, it is easier to go to mode, but the wave passes more rigidly.
If we consider loading capacityBoth boats are designed to carry 4 people or 400 kg of payload, but because of the greater width, Progress feels more stable when people move inside the cockpit, which indirectly affects safety and comfort, although this does not affect dry mass.
| Parameter | Progress-4 | Kazankah-5M | Ob-3 |
|---|---|---|---|
| Body mass (kg) | 145 | 150 | 140 |
| Length (m) | 4,5 | 4,28 | 4,3 |
| Width (m) | 1,6 | 1,6 | 1,5 |
| Max power (hp) | 30 | 30 | 30 |
Equipment and supplementary elements
The weight of the boat is very much dependent on what you've put in it. The factory version was spartan: two cans (seats) and a minimum set. The actual operation dictates its conditions. The installation of rundooks in the nose, the top for running lights, the windshield and the railing adds another 10-15 kg to the mass.
Special attention should be paid fuel tankA standard 22-litre refueled takeaway tank weighs about 17 kg. If you use built-in tanks or increase your fuel supply for long-distance crossings, it will directly affect the total weight and differentiation of the vessel.
Ackor Hall or Denforth weighing 10-12 kg plus 30 meters of chain (chain weight about 10 kg) is another +20 kg, which are always on board. In total, equipment can "weight" a boat by a quarter of its own weight.
☑️ What to Consider Before Weighing a Boat
Effect of body condition on weight
Buying used Progress 4You might encounter surprises. Decades of use in aluminum seams could have filled with dirt, silt, or even water if there were microcracks. Although aluminum doesn't rust like steel, fouling with algae and shells in season also adds weight that disappears after washing and cleaning.
If the previous owner had repair If you were to use epoxy resins, glass canvas, or put extra sheets of metal on the bottom, the body mass could grow, and visually, it's hard to tell, but on scales, the difference is noticeable. A heavy boat requires more power to plane and more time to accelerate.
Attention! Excessive weighting of the stern (for example, installing a heavy anchor box in the cockpit) can cause the boat to stop plane even with a powerful engine, it will “dig” water with its nose, increasing fuel consumption and engine load.
⚠️ Warning: When buying a used boat, be sure to inspect the transom. If it is overstretched with steel corners or filled with a thick layer of resin, this could add 5-10 kg of excess weight, which is critical for balance.
Calculation of load capacity and passenger capacity
Passenger capacity Progress 4 It's 400 kg. That means that the weight of all passengers, cargo, motor and equipment should not exceed that number. If you translate this into people, 4 people 80 kg is 320 kg. There's only 80 kg left for motor, gasoline and things.
In practice, owners often ignore these rules, but this can lead to a decrease in the height of the board above the water. height It can decrease to critical levels, and any side wave will cause the cockpit to flood with water.
For families with children and lots of equipment (tents, food), it is better to focus on 3 people on board, this will provide a margin of buoyancy and comfort. Remember that the weight of water that gets inside the boat is also deducted from the payload.
The optimal load of Progress-4 for a comfortable and safe passage is 2-3 people and the minimum necessary cargo. Excess rated carrying capacity is prohibited by the GIMS rules.
Frequently Asked Questions (FAQ)
Can I install a 40 hp engine on Progress 4?
Technically, it's possible to establish, but it's a violation of security and data-sheet figures, and the Tran can't withstand the vibrations and weight of a more powerful motor, and the body is not designed for such speeds and impact loads, and it can destroy the seams and endanger life.
Which trailer is better to choose for progress?
The best fit is a specialized boat trailer with a keel track and lodgings, designed for a load of up to 750 kg. This will allow you to safely transport the boat without fear for the integrity of the hull and stability on the track.
Is Progress 4 sailing hard in the wind?
Yes, due to the high side and wide shape of the hull, the boat has a significant sailing capacity, especially when wind is on board. When mooring or fishing in the current and wind, it is recommended to use anchor or mooring ends on both sides.
Do I need to lubricate the aluminum casing?
AMG aluminum alloys used in production do not require painting to protect against corrosion, but anti-fouling treatment (if the boat is in water) and regular washing will prolong its life and preserve its presentation.