The legendary Soviet boat Progress-4 It remains one of the most popular swimming facilities on domestic water bodies, despite the age of the model. Owners are often interested in the question of the exact dimensions, as this depends on the possibility of transporting a passenger car on the roof, launching from a specific shore and installing modern attachments. Exact dimensions of the hull critical for the calculation of the trailer device and the planning of the storage site.
This aluminum-boat It's designed to be very demanding, so it's geometry that combines stability and vigor, and understanding the actual dimensions, including the height of the side and the length of the waterline, will help you to properly distribute the payload. We'll go into detail on the geometry of the hull.
Total length and width of the shell
Overall length Progress-4 This is the maximum value measured from the forehead to the transom cut, including the piers, which makes the boat a small boat, which makes it easier to register, but limits the wave height that can be safely dealt with. When calculating the space in the garage or on the trailer, you need to consider that the real length can increase by 10-15 cm due to the installed bow jar or keel board.
The width of the hull in mid-spangout reaches 1500 mm. This is quite a wide indicator for a four-meter boat, providing an excellent service. persistenceBecause of its width, the boat is comfortable moving passengers inside the cockpit and less prone to a sharp roll when fishermen move, but it is worth remembering that the full width includes the hut profiles, which can cling to the sides when loaded on narrow looms.
The height of the side on the midfield is 480 mm, which in combination with the width gives a good volume and buoyancy margin. It is important to consider that the height of the board in the nose is much higher due to the strong zygomatic line, which provides excellent germination on the wave. For comparison, many modern counterparts have lower board, making Progress drier and safer in windy weather.
When measuring the width for the manufacture of an awning, always add 5-7 cm from each side to the freedom of fit and thickness of the material.
Dimensions and area of the cockpit
The useful area of the cockpit is the space where passengers and cargo are located. Progress-4 The cockpit is about 2,450 mm long, measured from the transom to the back of the runduk (or the nose jar as standard), and the width of the cockpit in the seat area varies from 1,200 to 1,300 mm, tapping to the nose and expanding to the transom, which allows four adults to comfortably fit in, although three are more comfortable for long transitions.
The height from the floor to the pier allows you to fish standing, which is an important advantage of the advanced inflatable counterparts. The floor of the boat is formed by three removable floorboards, which also serve as seats. floorboard construction allows you to remove them for drying or washing the case, which prolongs the service life of aluminum and prevents corrosion.
- 📏 Cockpit length: 245cm
- 📏 Maximum width of the cockpit: 130 cm
- 📏 Distance from transom to first seat: 90 cm
- 📏 Height of the board inside (from the floor): 40 cm
It's worth noting that the geometry of the cockpit allows you to install a handook console to control the motor with the steering wheel, which frees up the center part for the load. When you install the console, the useful width of the passage can decrease, but the ergonomics of the control significantly benefits.
specifications of the transom and outboard motor
Tranza Progress-4 It is the most loaded element of the stern, as it is the one that transmits engine thrust and wave shocks. the height of the transom is 380 mm. This is the standard size for installing most outboard motors with a long leg (L). However, many owners prefer short leg (S) motors, installing them with a slight slug or using the spacers to lift the lower unit higher.
The width of the transom between the inner edges of the zygomatic profiles is 360 mm, and the full width of the trims of the side is the same 1500 mm. Thickness of the transan In the factory version is often 3 mm, but when installing powerful motors (more than 30 hp), many owners strengthen it with linings up to 4-5 mm to avoid vibrations and cracks around the fasteners.
Nuances of engine installation
When you install a motor with a short leg on Progress-4, you often experience cavitation at full speed, whether you install a hydrowing (anti-cavitational stove) on a lower unit or make a wooden lining on a transom with a height of 40-50 mm.
The recommended engine power for this boat varies from 10 to 40 hp When using motors over 30 hp, you must be careful with weight distribution: shifting the center of gravity in the stern can lead to burrowing with the nose on the go. The maximum allowable power specified in old passports is often underestimated, and the real safety margin of the hull allows you to put more powerful units, provided the correct weighting.
Weight specifications and load capacity
Own weight of the hull Progress-4 Without equipment and motor, this value can vary depending on the year of manufacture and equipment (having a hazelnut, windshield, additional boxes), a weight of 140 kg allows two strong men to remove the boat from the trailer by hand, although using a winch or a cockpit crane greatly facilitates the process.
The boat has a carrying capacity of 400 kg, which includes passengers, engine, fuel and equipment. Progress-4 It can carry heavy loads while staying afloat, but it has a critical impact on driving performance and safety, and overloading leads to lower freeboard height, making the boat vulnerable to swelling.
| Parameter | Meaning | Note |
|---|---|---|
| Longest length | 4,000 mm | Including forespeak |
| largest width | 1500 mm | Midel-spangout. |
| Height of board | 480 mm | Midle. |
| Own weight | 140 kg | No motor or gear. |
| Load capacity | 400 kg | Passport (really more) |
When calculating weight, remember to add the mass of anchors, chains, fish boxes and fuel boxes. Gasoline in a 20 liter tank will add another 15 kg to the total weight. Correct calculation of the centering is important: heavy things (anchor, battery) are better placed closer to the diametric plane and closer to the center of the boat.
☑️ Check before buying used Progress
Transportability and dimensions on the trailer
One of the main reasons for popularity Progress-4 The width of 1.5 meters allows you to stack the boat across the roof, but the length of 4 meters requires long remote arcs or a specialized trunk. When transporting on the roof, sailing must be considered: side wind can significantly affect the handling of the car.
The more popular way is to use a boat trailer, where the trailer is used to place the boat with its keel on roller looms, and the dimensions of the boat + trailer are about 4.5 meters long and 1.8-2.0 meters wide (including trailer wheels), which allows you to move freely on public roads without special permits, since the width does not exceed 2.55 meters.
When preparing for transportation, make sure that all removable elements (piolas, seats, johnduks) are securely fixed or removed. The windshield, if installed, is also better dismantled or securely fixed so that the air flow does not damage the fastenings at high speed. Aerodynamics The angular body creates additional resistance, increasing the fuel consumption of the tractor.
Drawings and the possibility of modernization
For those planning a restoration or serious tuning, knowing the exact dimensions is often required to replace rotten deck elements or make new hazelnuts. Progress-4 They are widely distributed in the network, but it is always worth checking the dimensions on a particular instance, since over 50 years of release, the geometry could slightly “float” depending on the manufacturer.
A popular upgrade is the hooded nose, which increases the length of the boat to 4.2-4.3 meters, but significantly improves driving performance, and often changes the shape of the transom, making it more vertical for the installation of more powerful motors, or strengthen the bottom with additional longitudinal aluminum redans.
Progress-4 is a constructor for an adult: knowing the basic dimensions, you can endlessly improve the boat for your tasks, from fishing to water tourism.
When manufacturing new parts, use aviation aluminum (duraluminum) grades D16T or AMg5M. The use of conventional steel or ferrous metal is unacceptable due to the difference in electrochemical potentials, which will lead to rapid electrochemical corrosion of the aluminum case.
Frequently Asked Questions (FAQ)
Can I put 50 hp on the Progress-4 engine?
Technically, the hull will withstand 50 hp, but it will require a mandatory strengthening of the transom and very competent weighting. The speed will increase to 45-50 km / h, but the boat will become prone to yaw and can lay on turns. It is safer to limit 30-40 hp.
What is the real weight of a Progress-4 boat with an engine?
The body itself weighs about 140 kg. Complete with the engine (30 kg), tank (5 kg) and anchor (10 kg), the total weight will be approximately 185-190 kg.
Will Progress-4 fit into the trunk of the station wagon?
No, 4 meters long will not allow you to put the boat inside even the longest station wagon without serious disassembly (removal of the transom and bulkheading of the hull, which is impossible), only the roof or trailer.
Should I paint the bottom of Progress?
Aluminum casing does not require painting, as the oxide film protects the metal, but painting with epoxy compounds or using unfouling paints makes it easier to clean stain and improves glides.
⚠️ Warning: When welding or drilling the body, use only argon welding and special fluxes for aluminum. Conventional electric welding will destroy the metal structure.