The Soviet industry gave water engines many legendary models, but aluminum-boat The Ob series has a special place among them, and has become a symbol of affordability and reliability, allowing thousands of fishermen and tourists to explore the vastness of rivers and lakes, and unlike modern vessels, these vessels were designed with a focus on maintainability and durability, as evidenced by their active use even decades after their release.
In this article we will discuss in detail Technical specifications of the boat Ob 1Understanding the design features, body parameters and permissible loads is necessary not only to buy a used copy, but also to properly maintain the existing boat. The year of the beginning of mass production of this model fell on 1964.It sets certain standards of quality and materials that are different from modern ones.
Examining data-sheet figures and real operational indicators will help you make an informed decision about the feasibility of acquiring or upgrading this vessel. Below we will take a detailed look at the dimensions, weight parameters and installation options. outboardBased on proven data and experience of the owners.
History of creation and design features
Development of the boat OBE 1 The design team was working at the Novosibirsk Chkalov Aviation Plant, which in itself indicates a high level of engineering culture of production, the designers were tasked with creating a mass, cheap and durable floating craft that could be produced in large volumes. The use of aviation aluminum was a key success factor, providing the product with high corrosion resistance and low weight relative to dimensions.
The design of the body is made according to riveted-welded technology, which is a distinctive feature of many products of that period. Aluminum alloysThe hull, which was used in the manufacture, allowed to withstand the significant impact loads characteristic of swimming in shallow water and overgrown banks. The hull did not require complex maintenance, painting or impregnation, unlike wooden counterparts, which made it extremely popular in remote regions of the country.
It is important to note that the geometry of the bottom and sides was developed taking into account the installation of outboard motors of low power. Tranza The boat was originally designed as a reinforced element capable of withstanding the vibration and thrust of the engines of the time, which allowed the model to remain relevant even after the advent of more powerful engines, although with some limitations in speed and handling.
⚠️ Warning: When buying a used boat, Ob 1, be sure to check the condition of rivet seams and welded joints in the area of the cheekbones, which is often where microcracks occur due to metal fatigue after many years of operation.
Overall dimensions and weight parameters
One of the main reasons for the popularity of the model was its compactness in combination with a useful volume. Boat dimensions Ob 1 They allow you to easily transport it on the roof of a passenger car or even in a trailer without requiring a special permit for transportation. maximum-size It is 4360 mm, which makes it a medium-sized motorboat.
The width of the vessel also plays an important role in ensuring stability. At a width of 1600 mm, the boat feels confident on the wave, although it is inferior in this parameter to the wider “Crimea” or “Kazanka”, the height of the board at 560 mm ensures comfortable accommodation of passengers and protects against splashes, but at full load and plane care is required.
Weight specifications are a critical parameter for many owners planning to launch without the use of mechanized equipment. Hull mass Without motor and equipment, it is about 145 kg. This is enough for carrying by hand, so owners often use homemade trolleys or winches to launch into the water.
- 📏 Length longest: 4,360 mm
- 📏 Width largest: 1600 mm
- 📏 Mid-line height: 560 mm
- ⚖️ Body weight: 145 kg
Capacity, load capacity and passenger capacity
The interior of the boat is organized as rationally as possible. Passenger capacity The design is officially declared as 4, but two or three adults are most comfortable on board, and the design includes two transom cans (seats) and a front handbag, which can also be used as a seating place if necessary.
Load capacity The vessel allows for a significant amount of equipment, which is especially valuable for fishermen and tourists, with a maximum load of 400 kg, including the weight of passengers, engine, fuel and equipment, exceeding this limit can lead to a critical decrease in freeboard height and loss of stability.
There are special niches and rundoos for storage and equipment, and in the bow there is a sealed box that protects things from water even in the face of extreme excitement, making the boat suitable for multi-day hikes, where you need to transport tents, gear and food supplies.
To increase comfort during long transitions, use inflatable seats on top of regular wooden cans - this will reduce the load on the back and improve cushioning on the wave.
Technical specifications of the body and materials
The basis of the reliability of the Obi is the material of the case. aluminum-alloy AMG2, which has excellent anti-corrosion properties, varies in thickness: the bottom was usually made of a sheet 2 mm thick, and the sides were made of a thinner metal, which allowed to save weight without loss of strength.
The body kit design includes stringers and stems that provide stiffness. Welds were made by argon-arc welding, which ensured tightness of the joints. However, over time, under the influence of vibration and impact, cracks can appear in the heat zone of the welding, requiring the attention of the owner.
The bottom of the midfield is about 10 degrees keely, a trade-off between driving performance and parking stability that allows the boat to ride the wave with confidence, but does not provide the gentleness characteristic of the deep V-shaped hulls of modern models. Scully keels They help to stabilize the boat on the course when moving.
| Parameter | Meaning | Unit of measurement |
|---|---|---|
| Longest length | 4,36 | n |
| largest width | 1,60 | n |
| Height of board | 0,56 | n |
| Hull mass | 145 | kilogram |
| Load capacity | 400 | kilogram |
Power specifications and installation of the motor
The issue of installing the engine is one of the most controversial among the owners of the "Obi". The manufacturer initially recommended the installation of engines with a capacity of up to 8-10 hp However, practice has shown that the body can withstand more powerful units, although this requires improvements. Recommended capacity for comfortable planing with two passengers is 10-12 hp.
The boat’s trawl is standard height for a short leg (381 mm), which corresponds to most Soviet and modern two-stroke engines. When installing engines with a capacity of more than 15 hp, you must take into account the increased load on the aft part and the risk of flooding with a wave during the associated excitement.
To achieve maximum speed (about 30-35 km / h with a 10 hp engine), it is important to choose the right screw and distribute the weight on board. Shifting the load to the bow often helps to quickly enter planing mode, but impairs visibility and handling.
☑️ Check before installing the engine
⚠️ Note: Installation of a motor with a capacity of more than 15 hp on the boat "Ob 1" without the appropriate registration in the GIMS can be regarded as a violation of the rules, since formally it changes the class of the vessel and its speed specifications.
Operation, maintenance and modernization
Despite the simplicity of the design, aluminum-boat The main enemy of aluminum is electrochemical corrosion, which occurs when it comes into contact with other metals in salt water, and errant currents. Fresh water is less aggressive, but seam control is mandatory. Regular washing of the case after going out into the water, especially in salty waters, significantly prolongs the life of the product.
Owners often resort to upgrading boats to improve performance. hydrofoil They're also used to drive a lower unit engine, which allows them to go out on the plane faster and save fuel, and they often change their regular wooden cans for lighter, more comfortable seats with soft cushions.
Repairing holes or cracks is usually done by argon welding or soldering with special solders for aluminum. It is important to carefully clean the surface of the metal to shine before starting work, removing the oxide film. The quality of repair depends on the preparation of the surface and the skill of the master.
The secrets of tuning
Many owners install additional boolean boxes of plastic or foam on the boat's nose, which increases unsinkability and allows you to store dry things in close proximity to the cockpit.
The main resource of durability of the "Obi" is the absence of contact of heterogeneous metals and regular visual monitoring of the condition of welds after each winter season.
Frequently Asked Questions (FAQ)
What is the real speed of the boat Ob 1 with a 10 hp engine?
With a single driver and a full tank, the speed of the instrument is usually 25-28 km / h. With two passengers, the speed drops to 20-22 km / h, the exit to planing can be difficult with a strong load.
Do I need to register the boat Ob 1 in GIMS?
Yes, the hull weighs 145 kg above the tax-free limit of 200 kg (including a motor up to 10 hp, the total mass will be more than 200 kg). Under current legislation, boats with a mass of more than 200 kg or an engine power of more than 8 kW (about 10.8 hp) are subject to mandatory registration.
Can you use the boat Ob 1 on sea water?
Use is possible, but with limitations: Aluminum alloys are sensitive to saltwater galvanic vapor, require a mandatory freshwater wash after each exit and use zinc treads to protect the housing from corrosion.
Where can I find plans to repair or restore Obi 1?
The original designs of Chkalov's designs can be found in the archives of technical literature or in specialized powerboating forums. Often enthusiasts post scanned pages of old magazines "Boats and Yachts" with the size of the contours.