When choosing a boat for fishing or hunting, one of the primary criteria is always physical size, which determines the transport logistics, storage conditions and, most importantly, the behavior of the vessel on the wave. Boat Ob 3 It is a classic Soviet and Russian shipbuilding model that has proven to be a reliable βworkingβ option, but many newcomers looking for information about dimensions often confuse this model with the more popular Obue or Obu-M, which leads to errors in the calculation of the trailer device and load planning.
In this article, we will discuss in detail what is real. length of the boat Ob 3How this compares to the width and height of the vessel, and why knowing the exact millimeters is critical to water safety, we're not going to limit ourselves to the passport numbers, but to how the declared dimensions affect the actual operation in a small and medium-sized reservoir, and understanding the geometry of the hull will help you make an informed decision about whether to buy or upgrade an existing boat.
It should be noted immediately that overall dimensions are not just reference data for filling out forms in GIMS. The length of the keel part directly depends on the cruising ability and ability to hold the course, especially in the oncoming side wind. Aluminum alloyThe hull is rigid, but the geometry of the frames is the overall strength of the structure, so when you look at the specifications, it's important to keep in mind not only the length of the deck, but also the internal dimensions of the cockpit, which determine the comfort of the crew.
Basic dimensions and data-sheet figures
Official documentation for boat Ob 3 It has very regulated values, which are minimal in production, and the length of the hull on the waterline and the full length on the deck are two different parameters that are often mixed, and for this model, the full length is 4 meters exactly, which makes it a small boat that allows motors to operate up to 30-40 hp depending on the modification of the transom.
The width of the hull is also key to stability: the Ob-3 has a 1.5-meter limit, which is a compromise between a narrow, fast-moving shape and a wide, stable platform. The height of the midship allows two or three full-equipment people to safely be accommodated on board without fear of scooping up splashes during moderate chop.
- π Full length of the body: 4,000 mm
- π Midel-spangout width: 1500 mm
- π Mid-line height: 600 mm
- βοΈ Weight of the case without equipment: about 150 kg (variable from the year of manufacture)
β οΈ Note: When measuring the length for transportation on the trailer, take into account the transom and the possible presence of a nose spit or ducks, which can increase the overall length to 4.2 meters.
It is important to understand that passport length It's measured by rigid structural elements, without soft linings, sonar brackets or additional handkerchiefs, which owners often install themselves, and these additions can significantly affect the ability to compactly store in a standard-sized garage. So when planning a parking place, always add a minimum of 10-15 centimeters of stock to your data-sheet figures.
Effect of the length of the hull on seaworthiness
The length of the waterline is the main factor determining the maximum theoretical speed of a displacement vessel. boats Ob 3 With its four meters of length, this means that the planing is only possible with the right weighting and the presence of a sufficiently powerful motor, the short body responds faster to vertical swinging, which can reduce the comfort of driving in the oncoming wave compared to longer analogues such as Kazanka-M or Wind.
However, the shorter length has its advantages: the maneuverability of the shortened hull is higher, which is critical when fishing in a trunk or on narrow ducts. bottom silhouette The bow helps the boat to rise more easily by softening the impacts, but because of the relatively short length of the hull projection onto the water, the vessel may be more prone to yawing on the Fordevind courses (wind), requiring the steering officer to constantly monitor the course.
It's also worth noting the effect of length on sailing. The high side, combined with the compact length, creates a certain area that perceives wind pressure. In squally winds, it can become difficult to operate a lightweight aluminum boat, especially if the crew is small, so knowing the exact dimensions is necessary not only for transportation, but also for assessing wind constraints.
Use transom plates (interceptors) on the motor to compensate for the diffraction of the short body and improve the plane output.
Internal dimensions of the cockpit and usable area
The outer dimensions are only half the picture, and it's much more important for the angler or the hunter to know how much space is left inside. Useful cockpit length The Obi-3s are smaller than the total length of the hull, as the bow and stern have bevels and deck slabs, and the bulkheads are usually about 3.2 to 3.4 meters apart, allowing two adults with fishing rods and gear to comfortably fit.
The width inside the cockpit is also less than the outer width due to the thickness of the side and the presence of hinged bars. On average, the workspace is about 1.2-1.3 meters. This is enough to accommodate two boxes with gear on the sides and the passage in the middle. However, when fully loaded with three passengers, free space almost disappears, turning the boat into a tightly packed module.
| Parameter | Value (mm) | Comments |
|---|---|---|
| Full length | 4000 | By hull roundabout |
| Full width | 1500 | Midle. |
| Cockpit length | ~3300 | Between bulkheads |
| Cockpit width | ~1250 | Clear space |
| Height of board | 600 | From the bottom plane |
When planning to install additional equipment such as handbags, tables or spinning mounts, you need to carefully recalculate the available volume. Aluminum case It does not forgive errors in marking: excessive drilling can lead to corrosion, and an improperly placed box can block access to the bow compartment or make it difficult to move on the boat.
Transportation and Storage: Taking Length into Practice
Transportation boats Ob 3 It's almost impossible to use a car roof because of its length and weight, and four meters is the limit for a passenger trailer, but it's standard for a boat trailer, and when you buy or manufacture a trailer, you have to keep in mind that the length of the lodging has to be the length of the body, so that the nose and stern don't hang critically, creating a lever that's dangerous to the structure when braking.
When stored in a garage or in a parking lot, the length of the boat dictates the size requirements of the box. The standard garage for the "Zhiguly" or "Volga" is often about 4-4.5 meters long. Boat Ob 3 It will fit into such a garage only if it is placed vertically (on board) or if the garage is elongated. Horizontal storage on shelves requires a minimum of 4.2 meters of free length.
- π For transportation on the upper trunk the length is too long (special permission and protruding over dimensions are required).
- οΏ½ trailer trailer requires a lozenge length of at least 3.5 meters.
- π For garage storage, space from 4.1 meters in length is required.
β οΈ Warning: When placing a boat for winter storage indoors, make sure that temperature changes do not lead to condensation inside the closed hull, as the length and volume of the cockpit contribute to the accumulation of moisture.
Comparison with analogues and modifications
To better understand the place boats Ob 3 It's useful to compare the size of the shipbuilding industry to its closest competitors, and often the choice is between Obue, Obew-M and Obue-3. The M is seaworthy and has slightly different contours, but the overall length is often similar, varying between 10 and 20 centimeters, but Ob-3 is often marketed as a more utilitarian version.
Compared to Kazanka, Ob-3 is lighter but less long. Kazanka in the 2M or 5M series is more than 4.5 meters long, giving it a significant advantage in its course and capacity. Ob wins in its ability to be towed by low-power cars due to its lower weight and dimensions. The choice between length and weight is always a compromise, depending on the tractor and operating conditions.
Hidden nuances of sizes
data-sheet figures sometimes indicates the length without taking into account the beams. The real size can be 2-3 cm more, which is critical when making a cover or awning.
When looking for parts or awnings, it is important to focus on the Model 3, as the templates for older or newer versions may not work. A difference of a few centimeters in the bow can make it impossible to install a regular windshield or awning shelter. Accurate measurements own copy before buying accessories - the golden rule of the owner of a metal boat.
βοΈ Check before buying a boat Ob 3
Modernization and resizing
Many owners are thinking about increasing the usable space. transprancing It's possible, but it requires a lot of engineering, and if you weld it or rivet it, you can change the centering and the strength of the body, and if you don't do that, you can actually break the body down in the wave.
The safer way is to optimize the interior space, moving haunches, installing compact seats, and using soft bags instead of hard drawers, wins tens of centimeters of usable length, especially for boats with Obi 3 dimensions, where every centimeter counts when you place two anglers with equipment.
In conclusion, it is worth saying that 4 meters long It's the borderline size that separates lightweight inflatable boats from full-boat metal boats, and it's a size that already makes you feel comfortable in big water, but doesn't require a powerful tractor to transport it, and understanding the exact dimensions of your boat is the first step to safe and comfortable operation.
Accurate knowledge of the length and width of the boat Ob 3 is necessary not only for registration in the GIMS, but also for the correct selection of the trailer, awning and assessment of seaworthiness.
What is the exact length of the boat Ob 3 on the passport?
The full length of the hull of the boat Ob 3 is exactly 4000 mm (4 meters). Midwidth - 1500 mm. These data are indicated in the technical data sheet of the product.
Can I transport Ob 3 on the roof of a car?
Technically, this is possible with a powerful trunk and mounts, but a length of 4 meters creates a significant overhang in the front and rear, which is dangerous and can violate traffic regulations regarding the dimensions of the vehicle.
Will the Ob 3 fit in a standard garage?
A standard garage is about 4-4.5 meters long and a 4-meter boat can fit sideways, but for comfortable passage and maintenance, you will need either an elongated garage or storage of the boat on special brackets against the wall or under the ceiling.
Does the length of the Obi 3 affect speed?
Yes, the length of the waterline limits the maximum speed in displacement mode. To enter the planing with this length (4 m) requires a motor of at least 10-12 hp and the correct loading.