Aluminum flat-bottoms produced in the USSR have long been not just a means of transportation by water, but a real cultural classic for thousands of fishermen and hunters. Among the entire model range produced by Barnaul Transmash Plant, a special place is occupied by the company. Boat Ob 1It's a basic, classic version that laid the foundation for the popularity of the entire "obe" line and still plows the expanses of rivers and lakes, despite the age of many specimens.
Why does this model stay relevant? It's all about decades-old design, repairability and availability of parts. The owner of such a boat gets a reliable, albeit not without flaws, tool for conquering small and medium-sized bodies of water. In this article, we will discuss in detail the design features, possible leakage problems and modernization options.
History and design features
Branded boat production Ob It began in the 1960s, when Soviet industry was tasked with providing affordable transportation to residents of regions with a developed river network. OBE 1 It was the first mass-produced modification to replace the more primitive Kazankas and homemade lifeboats, designed with the expectation of mass production and ease of operation in the harsh climatic conditions of Siberia.
The hull is made of aluminum-magnesium alloy AMg5M, which has high corrosion resistance and strength. The technology of connecting parts is riveting, which is both a plus and a disadvantage of the design. On the one hand, riveted seam is less demanding to vibration than welded. On the other hand, over time, the joints can break tightness, requiring the attention of the owner.
The dimensions of the model allow it to be transported on a passenger car trailer or even on the roof of the car (if there are powerful arcs and traffic rules). The moderate keeliness of the bottom in the bow provides an acceptable germination on the wave, although the flat bottom in the stern makes the boat prone to yaw at high speeds.
Technical specifications and weight parameters
To understand operational capabilities Boats Ob 1 This is critical for engine selection and loading, and factory parameters may vary slightly depending on the year of production and the particular instance, but the basic metrics remain the same.
The weight of the hull is a very special consideration. Aluminum is lightweight, but in terms of the size of the boat, it's a very large weight, and you have to consider that when you buy a trailer and you choose a traction car, and you also have to consider the power limitations of the engine, which can lead to loss of stability and even rollover.
| Parameter | Meaning | Unit of measurement |
|---|---|---|
| Longest length | 4600 | mm |
| largest width | 1700 | mm |
| Height on midship | 750 | mm |
| Hull mass | 145 | kilogram |
| Load capacity | 400 | kilogram |
| Passenger capacity | 4 | man. |
| Recommended engine power | 30 | hp |
As you can see from the table, the boat's buoyancy rate is quite large, but full loading with four adult passengers and equipment significantly reduces the freeboard height. In such conditions, the wave is dangerous. The optimal load for comfortable and safe movement is 2-3 people plus cargo.
When calculating the load capacity, remember to add the weight of the engine and the full fuel tank to the weight of passengers and equipment.
Problems of tightness and repair rivets
The main disease of all riveted boats, and OBE 1 And as we know, the seams are leaky, and over time, aluminum gets tired of the constant wave-blows, engine vibrations, and temperature expansions, and the rivets start to leak water, and the boat gets water faster than the powerhouse or pump can draw it out.
Leak diagnostics are painstaking. Often, you can't visually determine where water leaks out. You have to pull the boat ashore, flip it over and inspect all the seams carefully. Sometimes tapping helps: a dull sound can indicate a sealant's detachment or corrosion under the rivet head. You can also use a soapy solution to pressurize air into the hull, but in the field, this is rarely applicable.
⚠️ Attention: Never use lead or lead-based solders to seal leaks in an aluminum case! Contact of heterogeneous metals in salt or even fresh water will cause instant electrochemical corrosion, and the hole will only get bigger.
Repairs usually involve replacing leaky rivets, drilling the old rivet, cleaning the hole and drilling into a larger diameter, and then installing a new, larger rivet with a thiocol sealant, and if the leak runs through the seam between the sheets, an aluminum strip over the problem area may be required.
It's important to pick the right tool. Aluminum rivets are best suited to work with aluminum, not steel rivets. Steel rivets will rust through the season, spoiling the appearance and creating a source of corrosion. The sealant must be specialized, elastic and resistant to ultrafietu and water, for example. AMG-Hermetic or quality analogues.
☑️ Repair of leakage in the enclosure
Installation of the motor and transax plate
The regular transom OBE 1 It is designed to accommodate an outboard motor up to 30 hp, but many owners are looking to install more powerful engines to achieve planing under full load. There is a serious risk. The reinforcement of the transom without changing the design of the hull can lead to the destruction of the stern of the boat under load.
The transom plate is the space where the motor is attached. Obi 1. It's reinforced with wooden bars sewn up with aluminum. Over time, the tree can rot, especially if the boat is kept without draining water. (regular check) the condition of the wood through the process holes or removing the engine is mandatory. If the tree has turned into debris, the transom loses its stiffness, and the motor can just tear off.
When you install the engine, it's important to set the right deadwell. Flat-bottomed aluminum boats are characterized by a full-blown splashing of the cockpit. Raising the engine higher can solve the splash problem, but it will reduce the efficiency of the propeller's stop. The optimal solution is to install a hydrowing (anti-cavitation plate) on the engine's daydwell.
Secrets of installation of hydrofoil
The hydrofoil is mounted on a cavitation plate above the propeller, it redirects the flow of water, pressing the stern of the boat and reducing the spray, and the angle of the wing can be adjusted to achieve optimal position of the boat on the water.
Tuning and modernization: from fishing to comfort
Possession Boat Ob 1 The factory is spartan, with two cans (seats) and a keyboard, which is not enough for the modern fisherman or tourist, and the tuning allows you to turn a utilitarian vessel into a comfortable boat for recreation.
One of the first things that we've done is install a windshield, and this model doesn't have a regular awning or a visor, and it's very tiring to head wind at 20-25 km/h, and you can make it yourself from polycarbonate, or you can buy a finished, customized glass. Obi.This greatly enhances comfort and safety by protecting against splashes and oncoming airflow.
- 🛶 Floor laying: The staff bottom is cold and slippery, and laying plywood or corrugated aluminum floors on the kylsons will insulate the boat and allow you to move freely around the cockpit.
- 🎣 Handooks and boxes: Putting sealed boxes under cans to store gear, fuel and spare parts, frees up space in the cockpit and center the load.
- 🔦 Lighting: Installation of running lights and internal lighting of the cockpit for fishing in the dark, power can be arranged from a separate battery.
- ⚓ Anchor system: Organization of the anchor anchor anchoring place in the bow with the possibility of rapid embalming and sampling of the anchor end.
Another popular trend of tuning is the hull-shaped nose, which is not only a convenient storage area, but also an additional sealed capacity that increases the boat's unsinkability. Some owners are going further by installing full-fledged console steering systems with remote control gas and reverse, which turns the boat into a seamless, water-tight, water-tight, water-tight, and water-tight, water-tight, water-tight, and a seamless, water-tight, water-tight, water-tight, and a seamless, water-tight, water-tight, and a seamless, water-tight, water-tight, water-tight, and a seamless, water-tight, and a seamless, water-tight, and a seamless, water-tight, and a seamless, water-tight, and a seamless, and a seamless, water-tr. OBE 1 It's like modern boats.
Competent tuning not only increases comfort, but also prolongs the life of the boat, protecting the structural elements from moisture and mechanical damage.
Operation, storage and wintering
An aluminum boat requires proper maintenance, especially in the off-season. Despite the persistence of the AMg5 alloy, improper storage can shorten the life of a vessel. The rule is that the boat should be kept in a dry, ventilated room. Left upside down in the street for the winter, it will turn into a "greenhouse" for condensate, which will accumulate inside and cause corrosion.
Before wintering, the hull must be thoroughly washed, especially from the inside, removing all dirt, mud and sand. The sand stuffed into the corners is hygroscopic and keeps moisture near the metal, causing spot corrosion. After washing, the boat must be dried. If the boat is stored assembled with the engine installed, it must be removed, washed with fresh water (if the operation was in salt water) and preserved.
⚠️ Attention: Don't keep a boat with a fuel tank inside, and the gasoline vapors are explosive, and the gasoline itself loses its properties over time and forms a resinous sludge that can clog the carburetor or engine injectors in the spring.
When stored in an open area under an awning, be sure to provide ventilation under the awning to avoid the effect of a thermos. It is best to keep the boat on a special slip or goats so that the bottom does not come into contact with the ground or snow. Regularly, every 2-3 years, it is recommended to conduct an audit of rivets and seams, even if there are no visible leaks. Prevention is always cheaper than major repairs.
How to keep a boat in the garage?
If space is scarce, the boat can be stored vertically, leaning on board, but this requires a special soft lining to avoid deforming the side, and it is best to keep the boat horizontally on a flat surface, turning upside down.
Owner reviews and summary
The opinion of the water motor community Boat Ob 1 It varies from enthusiastic to critical, but it's not indifferent. Experienced users value it for being "unkillable" and maintainable. In the remote taiga, where there are no services, the ability to repair with a hammer and a piece of aluminum is valued more than the comfort of a plastic boat.
Critics point to noise, stiffness and the need for constant riveting control. Indeed, on full planing with a powerful engine, a boat can behave unstable, requiring constant attention and experience from the steering wheel. However, for quiet fishing with an electric outboard motor or low-power gasoline, this is a great, time-tested option.
In conclusion, it may be said that OBE 1 It's a boat for those who love water and are not afraid of handwork, and it forgives many mistakes, but it requires care. If you're looking for a reliable, albeit noisy, fishing companion and you're willing to spend time on maintenance, it's a faithful companion for many years to come.
Frequently Asked Questions (FAQ)
What is the maximum weight of cargo can be taken on the boat Ob 1?
The official load capacity is 400 kg. However, for safe movement, especially on the wave, it is recommended not to exceed 300-320 kg. This is the weight of three people of average build plus a minimum set of equipment. Exceeding the limit reduces the height of the board above the water and increases the risk of flooding the boat.
What is better to seal the leaks: epoxy or sealant?
For temporary repairs in the field, epoxy plasticine (cold welding) is suitable. For major repairs of the seams, you need to use specialized thiocol sealants (for example, U-30MS, 8-NTP) in combination with the replacement of rivets. Simply "cover" the hole with epoxy is a solution short-lived due to the vibrations of the body.
Can I install a 40 hp engine on Ob 1?
Technically, you can set the transom will withstand a short-term load, but it is not safe. The boat is not designed for such power, its stability and handling will deteriorate. The manufacturer recommends motors up to 30 hp. Excess power can also lead to problems with registration in GIMS.
Should I paint an aluminum boat?
You don't have to paint the whole body, because aluminum itself forms a protective oxide film, but you can paint the bottom with antifouling paint (if the boat is in water) or camouflage paint (for hunting), and you can use paints that are compatible with aluminum to avoid corrosion.