Soviet motorboat Progress-2 It is considered one of the most popular and recognizable boats in the history of domestic water-motor sport and amateur fishing. Progress.It became a true symbol of affordability and reliability on the water in the 60s and 70s, and many owners still search for information about this model to restore data-sheet figures, pick up a trailer or compare specifications with modern aluminum counterparts.
One of the most common problems when buying a used copy or recovering documents is confusion about the exact sizes. Boat length Progress 2 Often listed with errors, as many hulls have undergone repairs or modifications over decades of operation, and in this article we will analyze the official data in detail, based on factory drawings and technical documentation of the time.
Understanding the actual dimensions is not only a matter of theoretical interest, but also a practical application: knowing the exact length and width of the storage space, the method of transport on the trailer and the calculation of the load capacity depends on the choice of storage space, and let's dive into the technical details so that you don't have any doubts about the size of this legendary "aluminum".
Official dimensions according to data-sheet figures
According to the factory specifications, which were developed by the Kuibyshev aircraft plant, the length of the hull Progress-2 It's not just a marketing number, it's a critical parameter for driving performance. full-length It is 4550 mm. It is important to understand that this size is measured from the nozzle to the very back of the transom, including all structural elements.
But the owner is more important than the so-called length The waterline or the structural length that affects speed. The documentation often features 4,500 mm, which is a rounded value. The 5 centimeter difference may seem small, but when calculating the Trailer, it becomes significant, which is why it is better to rely on the maximum value when ordering a cover or registering with GIMS.
The mid-spangout hull is 1,600 mm wide enough for a boat of this class to provide enviable stability, the bow height reaches 720 mm, and the transom drops to 380 mm, which forms a characteristic zygomatic kink, which allowed you to feel confident on the wave, although it required accuracy when landing.
⚠️ Note: When measuring length for registration in GIMS, consider protrusions such as a hinge bar or a keel if they go beyond the dimensions of the skin. Officially, the length is measured by design, but inspectors can use the roulette on protruding parts.
The weight of the empty hull is also directly related to its dimensions and the thickness of the metal. The standard weight was about 140 kg, which made the boat heavy to carry, but very stable on the go. The combination of a length of 4.5 meters and weight created inertia that extinguished the fine wave, providing a comfortable ride.
The geometry of the body and the effect of length on driving performance
Length Progress-2 It was not accidental, it was designed for optimal use with engines up to 22 hp (although it was often put on 30 hp). With this length and shape of contours, the boat could reach speeds of up to 40 km / h with one passenger. Increasing the length of the hull would allow for higher speed, but would require a more powerful and expensive engine, which went beyond the concept of the people's boat.
bottom shape keel And it works really well at 4.5 meters, and if the boat were shorter, say 3.5 meters, it would prowl a lot at the same width, and if it was longer, it would require a much larger buoyancy margin, and engineers found a middle ground where the length allows you to effectively cut the wave without going through your nose.
⚠️ Warning: Do not attempt to artificially lengthen the transom or forepeak to fit a more powerful motor, changing the geometry of the stern at this length will cause the centering to be disturbed and may cause the tilt.
At high speeds. Progress-2 It goes into planing mode, and the waterline is shortened, and the boat is based on transom slabs, and that's where the rigidity of the structure is critical: if the length was drawn from thinner metal, the hull would play on the wave, causing fatigue cracks in the welds.
To improve driving performance, Progress 2 often installs a hydrofoil on the engine, which helps the boat to go faster on the plane and reduces yaw on the course.
Comparison of Progress-2 length with other models
To understand the place Progress-2 In the hierarchy of Soviet boats, it is useful to compare its dimensions with its predecessors and competitors. Progress-1 The second model was shorter, with a length of 4,400 mm and a width of 1,500 mm, and the increase in size in the second model was in response to requests from users who wanted a more spacious and seaworthy vessel.
On the other hand, there was Progress-4The four were 4,750 mm long, making it more comfortable for overnight stays but less maneuverable for fishing alone. Kazan 5The squat was a major competitor, with a length of about 4,500 mm, but a flat bottom, making it less suitable for large water.
Below is a table showing the evolution of dimensions in the Progress line and comparison with the popular Kazanka:
| Model boat | Full length (mm) | Width (mm) | Year of commencement |
|---|---|---|---|
| Progress-1 | 4400 | 1500 | 1965 |
| Progress-2 | 4550 | 1600 | 1968 |
| Progress-4 | 4750 | 1700 | 1973 |
| Kazankah-5M | 4500 | 1600 | 1972 |
As you can see from the table, Progress-2 It was a niche between small Kazan women and large boats, with a length of 4-5 people, which was a remarkable measure of capacity for 4.5 meters, but the overloaded boat lost speed and safety, becoming a displacement vessel.
Features of transportation and storage
Transporting a boat 4.55 meters long requires certain rules. Standard passenger trailer often has a platform length of about 2-3 meters, so the length of the boat is very simple. Progress-2 It will be significantly oversized. When transported on public roads, you need to comply with the traffic requirements regarding protruding cargo.
If the protrusion is more than 1 meter, you need to install a sign "large-sized cargo" and, in some cases, a flashing light. The length in conjunction with the car can reach 9-10 meters, which must be considered when maneuvering and parking. Narrow roads and sharp turns become a serious test for the driver.
- 🚛 For transportation, be sure to use a reliable lobe or keel trailer, designed for a weight of more than 200 kg.
- ⚓ The nose of the boat must be securely fixed so that the sailing during the movement does not damage the transom or the board.
- 🛡️ The rear part hanging from the trailer is recommended to support with an additional wheel or stanchion, if the trailer does not have an elongated frame.
When stored in a garage, the length of 4.5 meters also dictates its conditions. The standard garage for the "Zhiguly" is about 5-5.5 meters long. Progress They'll enter with difficulty, leaving little room for passage, and often they're kept under canopies or upside down on special goats in the yard.
☑️ Pre-shipment checks
Registration and measurement nuances for GIMS
In production Progress-2 I'm going to check the GIMS records, as mentioned earlier. length If the documents show one digit and the tape measure from nose to transom (including the piers) turns out to be another, questions may arise.
For older boats without a serial number or passport, length is one of the identifying features along with width and height. The inspector can measure the length from the structure (metal) and the length of the overall length.
8 hp) rights are not required now, but registration is mandatory. Progress-2 With the engine 22 hp clearly requires the right category "M" and registration in the register of small craft.
⚠️ Note: If you are recovering documents for a boat without a number, do not specify the length "by eye", it is better to invite a specialist or measure to within a centimeter, as an error can lead to a refusal to register.
Maintenance and repair of the hull
Aluminum alloy D16, from which it is made Progress-2It is susceptible to corrosion over time, especially in welded seams and riveting areas. The length of the boat implies many transom and longitudinal seams that require regular inspection. Cracks often occur in the area of the cheekbones and mounting jars.
It's important to use the right materials when repairing. Argon welding restores tightness, but it requires skill. If you're planning to seal cracks with epoxy compounds, remember that this is a temporary measure. For a boat that will be sleeve-engineered, it's important to have a solid structure.
How to properly cook Progress Aluminum?
Progress casings (D16 alloy) require AK5 wire electrodes or similar, so it's important to clean the surface to a metallic luster and degrease before welding, boil it with short seams to keep the metal from overheating and geometry.
Bottom care is also related to its size: Anti-fouling paint treatment or just dent inspection requires access to the entire surface. Turning a 140-pound boat 4.5 meters long alone is almost impossible, so having a slip or assistants is a must.
Regular inspection of welds and riveted joints is the key to the long-term service of aluminum Progress. Ignoring small cracks can lead to a serious accident on the water.
Frequently Asked Questions (FAQ)
Can you increase the length of the Progress 2 to install a more powerful engine?
Theoretically, you can build up the transom or inserts, but it will disrupt the calculated centering and buoyancy. The boat can become a roller or get a differentiation on the nose / feed. It is safer to consider replacing the boat with a larger model, for example, Progress-4 or salute.
What is the maximum load for a boat of this length?
Passenger capacity Progress-2 This includes the weight of people, motor, fuel and equipment, and exceeding this limit is dangerous, because the boat will lose its buoyancy and can be overwhelmed by a wave.
Is Progress-2 in the dimensions for free parking?
Depending on the rules of the particular parking lot, usually free storage is allowed for boats up to 5 meters long and up to 2 meters wide. Progress-2 (4.55 m x 1.6 m) formally fits into these restrictions, but it is better to check with the administration of the reservoir.
Where to find the exact drawings for the restoration of the body?
Original drawings can be found in specialized magazines "Boats and Yachts" from the past years, on the forums of water engines or in the archives of GIMS. There are also modern 3D models created by enthusiasts based on measurements.