When choosing a boat for fishing or resting on the water, one of the paramount parameters is always the dimensions of the Progress 4. This is a legendary model that has been plowing the expanses of water bodies of the CIS countries for decades, and its popularity is largely due to the optimal ratio of size and capacity. Understanding the exact geometric parameters of the hull is critical not only for assessing the interior space, but also for logistics: whether you can transport a vessel on a standard trailer or oversized transport is required.
Unlike modern inflatable analogues, aluminum It has rigid, unchanging parameters that cannot be adjusted by the air pressure in the cylinders, which is why knowing the exact length, width and height of the side becomes the basis for planning a purchase. In this article, we will discuss in detail all linear dimensions, their effect on driving performance and practical aspects of operation. Progress-4 in real-world conditions.
It's worth noting that factory performance may have small tolerances, but the baseline figures remain the reference for the entire series. The dimensions directly dictate how much power the engine will have and how many people can comfortably fit on board with full gear. Let's dive into the technical details to eliminate any errors in the selection.
General geometric parameters of the housing
The basis for understanding the scale of the vessel is its basic linear dimensions. Full length. Progress 4 is exactly 4,500 millimeters, or 4.5 meters, which is a classic size for small pleasure craft and fishing boats, allowing you to feel confident on a wave up to 0.6 meters high, which is no longer the case for micro-boats, which ensures the stability of the course.
The hull width on the mid-spangout (the widest part) is 1700 millimeters, which is quite wide for a four-meter boat, which has a positive effect on stability. Progress-4 It's hard to flip over in a careless way, unlike the narrower Kazankas or Obeys, which allows you to move freely inside the cockpit without touching the side, and install additional equipment.
The height of the midship is 520 millimeters, which is often underestimated, but it determines how dry passengers will be when going against the wave. A half meter is a good safety indicator, which excludes water flooding during moderate chop. However, it is worth considering that the actual height of the board above the water depends on the load and the number of people on board.
- 📏 Length full: 4500 mm (4.5 m)
- 📐 Maximum width: 1700 mm (1.7 m)
- 🌊 Height of the side: 520 mm (0.52 m)
- ⚓ Unladen draught: 190 mm (0.19 m)
It's important to understand that all of these dimensions are external dimensions, and the interior space will be smaller by the thickness of the aluminum sheet and the size of welded elements like coamings and cans, but you're interested in the exterior parameters that we just outlined for transport and storage.
Effect of length and width on seaworthiness
Progress 4 is not just a passport number, it's the physics of the water. It's 4.5 meters long, and it allows you to develop a new body of water. glittering When you have a 30 hp engine and up, at these speeds, the waterline length is going to play a critical role in limiting the maximum speed, but there's enough time for recreational use of the margin.
The 1.7-meter width provides excellent initial stability, which means that the boat resists rolling when people board. Progress-4 It forgives many mistakes for beginners who may panic when the center of gravity is shifted sharply in narrower vessels. The wide hull also allows for more payload to be placed without critically lowering the height of the board above the water.
⚠️ Attention: Despite good stability, do not exceed the maximum passenger capacity of 5 people or 400 kg of payload. The wide hull creates sailing, and with strong side winds in the parking lot, the boat can tilt sharply.
The length-to-width ratio of this model is approximately 2.65:1. This is the classic proportion for universal motorboats focused on mixed swimming mode (both plane and displacement). If you plan to use the boat primarily for trolling at low speeds, this width will be ideal for installing downriggers and outriggers without risk of loss of stability.
Seaworthiness also depends on the shape of the nose, which is directly related to the dimensions. Bones coming from the forehead are of sufficient length to effectively discard the spray. However, when you are fully planing against a wave of more than 0.8 meters, the 4.5-meter body can begin to "slap", which creates discomfort. For such conditions, a length of 5 meters would be preferable, but within its class. Progress-4 He's showing himself up.
Dimensions of the cockpit and usable area
Exterior dimensions are important for logistics, but for the fisherman or tourist, what matters is what's inside. Progress-4 It's about 3.5 meters, if you count from the transom to the bulkhead of the runduk, and it's a space that's free of designs, and it allows you to have a bed for two adults or a full-fledged outfit for a multi-day expedition.
The width of the cockpit at its widest point is 1.5 meters, allowing you to pass freely between the sides without touching the skin, and allowing you to conveniently sit with a fishing rod or spinning. The cockpit floor is flat, which makes it easier to install additional knobs, gearboxes or even a small table. Work area It's ergonomically planned.
The height from the floor to the top edge of the side (the depth of the cockpit) varies depending on the place, but on average it is about 40-45 cm This is enough to sit on banks, hanging your legs down, or comfortably kneel. When installing windshield and awning, the internal dimensions make you feel quite comfortable even in rainy weather.
- 🎣 Length of usable space: 3,500 mm
- 👣 Center width of floor: 1500 mm
- 🪑 Distance between banks: regulated
- 🎒 Volume of runduks: 100 liters total
The knolls are particularly noteworthy, with airtight compartments in the bow and under the banks, and the dimensions of the compartments allow you to store things that you need to stay dry: documents, telephones, spare clothes, and the presence of such volumes inside the hull eliminates the need to hang bulky bags on board, keeping the boat centered.
Boat weight and transport specifications
Weight is derived from the dimensions and thickness of the metal used. Progress-4 With equipment (tiller, windshield, seats) is about 190-200 kg. This is a fairly heavy boat for its size, due to the use of aluminum-magnesium alloy AMg5M, which is characterized by high strength and corrosion resistance.
Transporting this weight requires a serious approach: it is impossible to lift a boat on a kilblock alone, you will need the help of at least two or three people or the use of a winch. When loading on a trailer, you must take into account that the center of gravity is shifted to the transomper due to the installation of the motor, so the axis of the trailer must be located accordingly.
For transportation on the roof of the car dimensions and weight Progress-4 And that's a very difficult option, because the 4.5 meter length will be very far out of the body, creating a huge sailing and a huge load on the roof, and the best way to do that is to use a boat trailer, where the boat is keeled down.
| Parameter | Meaning | Unit of measurement |
|---|---|---|
| Body weight without motor | 190 | kilogram |
| Load capacity | 400 | kilogram |
| Length on trailer (with breathable) | 5200 | mm |
| Width on the trailer | 1750 | mm |
☑️ Preparation for transport
When calculating the load on the car, remember that the weight of the boat will be added to the weight of the engine (about 25-30 kg for a 30-horsepower engine) and the weight of the trailer itself (about 100-120 kg). Total, the farcop will lie about 350 kg. Make sure that your car is able to to tow such a load, and that the category of driver's license allows you to drive a vehicle with a trailer of this mass.
Transcent dimensions and engine installation
The trawler is the fifth point of the boat, and its dimensions are critical to the engine. Progress-4 This is 380 mm (standard height for a 381 mm lower unit engine, so-called "S" length) and allows most standard outboard motors to be installed without the need to build up a leg or install slots.
The width of the transom allows you to install one powerful motor or two motors of lower power (the scheme "tandem"), although the boat is normally designed for one engine. The distance between the sides in the area of the transom is about 1.4-1.5 meters, which gives ample space for the installation of hydraulic lift brackets or additional sonar sensors.
The thickness of the transom ensures the rigidity of the attachment. However, when installing motors with a capacity of more than 40-50 hp, it is recommended to use additional reinforcing linings or transom wheels that distribute the load. Vibrations. A powerful motor on thin aluminum can lead to fatigue cracks over time.
⚠️ Warning: When installing the engine, make sure that the anti-cavitation stove is located 20-30 mm below the bottom of the boat. Incorrect installation height will lead to cavitation, engine overheating and loss of traction.
The motor is mounted with studs or bolts that pass through a trawler. It is important to use only galvanized fasteners or stainless steel, as steel bolts in contact with the aluminum body will cause rapid electrochemical corrosion, breaking the metal around the hole.
Comparison with analogues and modifications
There are many modifications and analogues on the market, and there is often confusion in size. Progress-4 It differs from the older Progress 2 in length and width, and there is also a Progress 4M version that may have minor differences in the bow contours, but the basic dimensions remain within factory tolerances.
Compared to competitors like the Kazanka-5M, Progress is better off in width and height, losing only a little bit in length. The Ob-3 will be lighter, but less comfortable on the wave. The choice is always up to the owner's priorities: some people care about ease of transportation, and some people - seaworthiness and internal volume.
In recent years, replicas and boats under other brands have appeared, copying the blueprints of Progress, and their dimensions can vary by several centimeters in the larger or smaller side due to the use of other matrices or metal flexible technologies, so always require a product passport with the actual dimensions when buying.
- 🆚 Progress-4 vs Kazanka-5M: Progress is wider and higher.
- ⚖️ Progress-4 vs Ob-3: Progress is harder and more roomy.
- 🏗️ Progress-4 vs Salyut-4: The salute has sharper contours.
Modifications can include the presence or absence of a zygomatic redane, different shapes of the forehead, all of which affect performance, but do not change the overall net dramatically. For anglers who make homemade awnings or rigid roofs, these millimeters can make a difference when fitting the frame.
Practical advice on measurement and purchase
If you're planning to buy a used boat, never take the word regarding the size. Take a roulette. Over the years, the boat has been repaired, digested by a transom or expanded, which changes the geometry. Check the angles especially carefully: the hull should not be skewed ("screw").
When planning the manufacture of an awning or a running bridge, add to the dimensions of the boat a reserve of 5-10 cm on each side. Aluminum in summer heats up and expands, in addition, the rigid frame of the awning should not rub against the side on the wave, otherwise the paint and metal will be rubbed. Accurate measurements They will save you from the unnecessary cost of remodeling.
To store a boat in a garage or parking lot, consider not only the length of the hull, but also the length of the engine's humming device if it remains attached. Also add space for passage around the boat for maintenance. Dimensions assembled with the engine can exceed 5 meters in length.
Can you increase the size of Progress-4 on your own?
Theoretically, you can build up or lengthen your nose by welding extra sheets of aluminum. However, this requires professional argon welding and knowledge of the technology of working with AMG5. Self-changing the geometry of the hull without calculations can disrupt the centering and stability, making the boat dangerous for operation.
Does the size affect the speed of the boat?
Yes, directly. The length of the water line limits the theoretical maximum speed in displacement mode. In planing mode, the ratio of motor power to the weight of the boat and passengers is more important. A wide hull creates more resistance than a narrow one, requiring a more powerful engine to enter the plane.
What sizes are required for registration in GIMS?
Boats longer than 3 meters or with an engine of more than 8 kW (about 10.8 hp) are subject to registration. Progress-4 with a length of 4.5 meters is subject to mandatory registration regardless of the engine power. The size of the annual tax, which is calculated based on the engine power, but the fact of registration depends on the length of the hull.
To sum up, Progress 4 is the result of years of experience in operation and engineering, and it's not just a set of numbers, it's a balance between capacity, seaworthiness and transportability, and knowing the exact dimensions will help you prepare your storage space, choose the right trailer and motor, and ensure that you can sail comfortably and safely for years to come.