Soviet Progress 4 It remains one of the most popular aluminum boats in the waters of the post-Soviet space, despite the age of the model. Boat width Progress 4It is often crucial when choosing a boat for fishing or family trips, and it is this parameter that directly determines the stability on the wave, the useful area of the cockpit and the possibility of installing a more powerful engine.
Many aquatic motorists mistakenly believe that the width of all the modifications of the "Progress" is the same, but the design features of different versions make their own adjustments. In this article, we will discuss in detail how the size of the body changed, what is the width of the cheekbone and why it is more important than the overall width of the transom in assessing comfort.
Understanding the exact geometric parameters is necessary not only for assessing driving performance, but also for logistics: whether the boat will enter the trunk or on the roof of a passenger car. The full width of the body of Progress-4 is strictly 1500 mm (1.5 meters)This is the standard for this class of metal motorcycles, but for a full analysis, we'll need to look at other linear dimensions.
Overall dimensions of the body and transmunus
When evaluating how much space a boat will take in a garage or trailer, first of all, look at the maximum external dimensions. Progress-4 The classic contours with a pronounced kilewitness in the bow, which affects the distribution of width along the length of the hull, the total width on the side in the widest part, as mentioned, is 1.5 meters.
But if you're planning a transportation trip, you might be interested in the width of the transom, because it often determines whether the boat will fit across the trunk racks. This model has a trapezoidal shape that tapers to the bottom, and it's a design that's driven by the demands of hydrodynamics and the need to reduce water resistance.
It is important to consider that the actual width during transportation can differ from the passport by several centimeters due to welded elements such as piers or bumpers.
- 📏 Maximum width of the body: 1500 mm
- 📐 Width of the transnese (top): about 1350-1400 mm
- 🚗 Dimension for the roof of the car: requires overhang or removal of the shaft bars
- ⚓ The width of the lower unit notch: affects the choice of motor
Breadth and stability of the boat
For a water motor engaged in fishing, a more important parameter than overall width is cheek-breadthIt's this size that determines how confidently the boat will be in rolling when the weight of the fisherman is shifting or when the wind is sideways. Progress-4 The cheekbones are located high enough that gives the body an excellent germination on the wave.
The width of the cheekbone of this model is about 1250-1280 mm. This is a fairly modest indicator by modern standards, where there is a tendency to expand the hull to improve initial stability. However, thanks to the deep V-shaped bottom with a keeliness of about 10 degrees per transom, the boat is excellent at cutting the wave and is not subject to strong onboard rolling on the move.
It is worth noting that a narrow cheekbones require the driver to be more attentive when mooring or moving inside the cockpit in the parking lot. Sharp movements can lead to noticeable roll, since the width of the waterline in calm water is less than the maximum width of the body.
To increase stability in the parking lot, inflatable outrigger cylinders can be used, which temporarily increase the effective width of the boat.
Installation outboard It is important to consider that the narrow hull requires careful alignment, and the displacement of the engine or passengers to one side on a narrow boat is felt more strongly than on wide Kazankas or new aluminum boats.
Internal dimensions of the cockpit and usable area
Interior space Progress-4 It's designed to accommodate four people, but it's most comfortable for two or three people, and the width of the cockpit in the midsection allows two adults to sit with their backs to the sides, but the bow space is narrowed.
The design provides for the presence of runduks and cans (seats), which also affect the available width for the legs. tuning Many owners dismantle standard wooden cans, replacing them with lighter aluminum structures or soft inflatable seats, which visually and physically expands the space.
The width of the passageway between the banks is a special consideration, and as standard, it can be narrow for people of large size in winter clothing, an important nuance for those who plan to use the boat not only in summer but also in the off-season.
☑️ Cockpit layout
The useful floor area also depends on the shape of the bottom, because the sides have a significant inward blockage, the width of the floor in the area of the zygomatic bends is less than the width of the timber, and this should be considered when calculating the place for installing additional equipment, for example, sonars or anchor systems.
The influence of width on the choice of outboard motor
Transcent width and general design of the stern part Progress-4 Although the boat is certified for engines up to 30 hp (and in practice often put and 40-50 hp), a narrow body can become a limiting factor.
If you install a motor that is too wide or heavy on a narrow transom, you run the risk of stern stern, especially when using old-style two-stroke engines or heavy four-strokes. Cavitation plate The engine should be located strictly parallel to the bottom, which is difficult to achieve on the skewed transom of a narrow boat.
⚠️ Attention! Installing a motor with a capacity of more than 30 hp on Progress-4 requires professional tweaking of the transom and strengthening of the aft part, since the regular transom may not withstand increased dynamic loads and vibrations.
In addition, the width of the lower unit (bottom of the motor) should correspond to the width of the notch in the transom. If the motor is too wide, it can touch overboard when cornering or will not allow full use of the gas distribution of water flow, which will reduce efficiency.
Transportation: width and weight
One of the most common questions owners ask is how to transport Progress-4 The width of 1.5 meters is borderline. The standard width of most passenger cars is 1.4-1.5 meters, and the width of the trunk on the roof is about 1.2-1.3 meters.
This means that you can't put a boat across the roof without protruding edges, and the sides will hang 10 to 15 cm on each side, requiring the marking of an oversized load (red rag or flag) and reducing speed, and the beams can also interfere with the tight fit to the supports.
Alternatively, the boat is mounted on a special trailer, in which case the width of 1.5 meters is ideal, as it falls into the standard dimensions for towing without special permits. However, the weight of the boat complete with the engine and equipment can reach 200-250 kg, which requires considering the load capacity of the trailer.
| Parameter | Value (mm) | Note |
|---|---|---|
| Full width | 1500 | Maximum dimensions |
| Breadth on cheekbones | ~1260 | Affects sustainability |
| Transnz width (top) | ~1380 | Motor anchorage |
| Cockpit width (midel) | ~1300 | Useful space |
| Height of board | 520 | Affects sailing. |
Can we expand Progress 4?
Theoretically, you can make the width by welding extra sheets of aluminum and changing the geometry of the cheekbones. However, in practice this is not practical: the centering is broken, the strength of the welds is lost, and the boat can become unstable. It is cheaper and safer to sell a narrow model and buy a wider one (for example, Progress-2M or Kazanka).
Comparison with modifications and analogues
To determine if the width is Progress-4 It's good to compare it to other models, like earlier versions or Progress 2, which had similar dimensions but different shapes from the forehead. More modern aluminum boats like the Crimea or Ob-3 often have increased cheekbones, making them more rolling in the parking lot, but more comfortable on the go.
Compared to PVC boats of similar length, the aluminum hull loses in width. inflatable tubes give a significant gain in usable area and stability. However, the metal benefits in durability and ability to move through shallow water, where the width and shape of the bottom play a smaller role than the strength of the hull.
For fishing alone or in combination, a width of 1.5 meters is sufficient, allowing you to confidently operate the boat while standing at the transom, and have access to both sides without having to bend over, and for family holidays with children, this size is also optimal, providing safety and stability.
The width of 1.5 meters is the “golden mean” for a single-engine aluminum boat with a length of 4 meters, providing a balance between speed, efficiency and capacity.
Frequently Asked Questions (FAQ)
Can you increase the width of Progress 4 on your own?
Technically, this is possible by welding inserts, but it is highly discouraged: changing the geometry of the hull will disrupt the design stability and strength, the boat can become uncontrollable on the wave or get cracks in the welds due to the changed load distribution.
What is the maximum width of the cargo that can be placed across the boat?
The inner width of the cockpit in the widest part (midels) is about 130 cm However, due to zygomatic bends and cans, the real space for placing wide objects (for example, boxes or nets) is limited to 110-120 cm.
Does the width of the boat affect fuel consumption?
A wider boat has greater water resistance (especially on planing). Progress-4 with its moderate width of 1.5 m is considered quite economical, but installing a wide engine or overload can negate this advantage.