The choice of a swimmer is always a search for balance between size, capacity and ease of transportation. The 390-centimeter model range occupies a unique niche in the inflatable vessel segment. These are not small two-seat rower options, but not bulky four-meter long boats that require a powerful transom engine and trailer for transportation. PVC 390 It often becomes a “middle ground” for amateur fishermen and avid tourists.
And in this size, manufacturers are trying to optimize the interior space as much as possible, while still being able to fold the boat into the trunk of a passenger car. But despite the apparent simplicity of the design, there are a lot of technicalities involved. The type of bottom depends on whether you can plane at full speed or be content with displacing mode. Understanding these differences is critical before buying.
In this article, we will discuss in detail why this size is so popular, what design features exist and what to look for when choosing. We will not use template phrases, but focus on real-world specifications and practical experience of operation. PVC materials Today, we have reached such a level of development that we can create vessels that can withstand serious loads, but require proper handling.
Design features of size 390 cm
The main feature of the 3.9-meter long models is their versatility: unlike the shorter ones, you can comfortably accommodate three adult passengers or install full-fledged fishing equipment, and the cylinders in such models are usually between 46 and 50 cm wide, which ensures excellent stability even in strong side winds. inflatable tubes They act as a buffer, extinguishing the blows against the wave, which makes swimming comfortable.
The bottom design is particularly important because it determines performance. In this size class, the two most common types are low-pressure inflatable floor (LDPB) and hard plywood or aluminum floorboard. The first option is maximum comfort and build speed, the second one is better driving performance and the ability to install more powerful motors. The choice depends on where you plan to ply the water.
⚠️ Note: When choosing a model with a hard floorboard bottom, remember that the weight of such a boat assortment can exceed 70-80 kg. Transportation and launching alone will be difficult without the use of a wheel transom or red tape.
The technology of seams is also critical, and for a length of 390 cm, the load on the joints of materials when moving on planing is much higher than that of small models. hot-glue Or welding seams to ensure tightness and durability of the joint, cheap analogs glued "cold" can be layered under load in the first season of active use.
Types of bottom: NDND vs. solder models
The question of floor type is perhaps the most pressing one when buying. Let's look at the pros and cons of each solution for a length of 3.9 meters. Pied-off boats with aluminum or plywood floors (often with profiles) are very rigid. They cut the wave better and allow you to reach higher speed at the same engine power. However, it takes longer and requires physical effort to assemble such a vessel.
inflatable floor models (BBBs) are devoid of rigid elements, which makes them simple to assemble. You just pump the cylinders and the bottom, and the boat is ready to descend. This is ideal for those who value time and comfort. In addition, the inflatable floor provides better thermal insulation and protection from the cold coming from the water. But there is a downside: at a high wave the bottom can "walk", and when you maneuver sharply, the feeling of stability of the platform decreases.
It is also worth mentioning hybrid solutions that use a combination of materials, such as plywood slate can be combined with inflatable elements to enhance rigidity. Strength of construction If you plan to walk often against the current or on a large wave, floorboard will be more reliable, and for quiet fishing on lakes and reservoirs, NDNDM will be a more convenient choice.
- 🚤 Pillet boatsExcellent course stability, the ability to install powerful engines, but more weight and assembly time.
- 💨 Models of NDNDMFast assembly in 10-15 minutes, light weight, comfortable bottom, but less planing speed.
- 🛡️ Cylinder protectionIn both types, it is important to have a hinge beam around the perimeter to protect against impacts on the pier or stones.
Choice of motor for boat 390
The correct engine selection is the guarantee that your PVC 390 For models of this size, the optimal power range is considered to be motors from 9.9 to 15 hp Lower power (2-5 hp) can only be used as auxiliary or for displacement, which is extremely slow and inefficient for distances of more than 2-3 km.
When you install a 15 hp engine and above, you need to consider the load capacity of the vessel. If you plan to take three people and a load, 15 horses will be just enough to go to the plane. If a crew of one or two people, even 9.9 hp will allow you to plane confidently. It is important to remember the gear ratio: for heavy boats, traction engines are better suited.
Nuances of the choice of the long leg of the motor
For boats with a high cylinder (more than 50 cm) or at full load, when the transom is immersed deeper, a Long Shaft motor may be required.
Motor attachment also has its own specifications: 390 cm boats often use reinforced transom boards; When installing a heavy four-stroke engine, it is important to control the angle of the trim; improper adjustment can lead to yawing of the vessel or "goat" on the wave. transom plates In this size are no longer installed, so the entire setting is made by mechanical change in the slope of the lower unit.
| Engine power | Mode of traffic | Fuel consumption (average) | Recommended loading |
|---|---|---|---|
| 5-6 hp | Water-displacement | 1.5 - 2.0 l/h | 1-2 people, calm water |
| 9.9 hp | planing | 3.0 - 4.0 l/h | 2 people + cargo, moderate wave |
| 15 hp | Active plane | 4.5 - 6.0 l/h | 2-3 people, full loading |
| 18+ hp | Sporting regime | 7.0+ l/hour | 1-2 people require experience |
Materials and durability of PVC
The basis of any inflatable boat is the material. 390 cm long models most often use reinforced polyvinyl chloride (PVC), the density of the fabric varies from 750 to 1100 g / m2. The denser material (900-1100 g / m2) provides better protection against puncture and abrasion, which is critical for frequent landings on unequipped shore.
Quality reinforcement It's a polyester or a capron that gives the fabric the tensile strength, it keeps the shape of a pressure boat, and cheap ones may not have enough reinforcement layers, which causes balloons to deform ("bubble") when heated in the sun, so the color of the material also matters: lighter colors heat up less, keeping the pressure stable.
In hot weather, the pressure in the cylinders increases. If you leave the pumped boat in the sun, be sure to blow some of the air before going out to avoid rupturing the seams or deforming the structure.
Furniture and glue also play a role. Plastic molding elements (pens, rod holders, valves) must be securely pasted. Places in the squirrel board are high-risk areas. This uses multi-layer reinforcement technology. When you look at a new boat, pay attention to the quality of the slurry: there should be no air bubbles, detachments or sticking out threads of fabric. Seam tightness It is a question of safety on the water.
Transport and storage
Despite being compact in deflated form, the boat is still a 390 cm overall cargo. When packaged, it is a bag about 120-140 cm long and weighing from 40 to 80 kg (depending on the type of bottom). For owners of sedans or hatchbacks, this can be a problem. Often you need to take off the back seat or use the roof trunk. For station wagons and crossovers, there are usually no problems.
Storage of PVC products requires compliance with the temperature regime. The optimal temperature is from +5 to +25 degrees Celsius. You can not keep the boat in a compressed state for a long time, especially at low temperatures. Periodically (once a season) it is recommended to inflate the boat and leave it in straightened form for a day to straighten the folds and restore the elasticity of the material.
☑️ Preparing the boat for winter storage
⚠️ Warning: Never keep a boat in the garage near open fire sources or reactive substances. solvent and gasoline vapors can destroy the PVC structure even without direct contact.
Popular models and brands
The inflatable boat market is saturated with offers, but the leaders remain unchanged. Among Russian manufacturers, brands that use quality imported PVC stand out. Flagship, Solar. or hunter They are often 390 cm long and are in demand because they are adapted to local conditions and offer good value for money.
Foreign brands such as Yamarin or Zodiac offer a premium segment. Their 390 cm boats often have more sophisticated ergonomics, quality bags and a rich out-of-the-box configuration. However, the price of such products can be 2-3 times higher than domestic counterparts. When choosing, you should look not only at the brand, but also at a particular model, since one manufacturer can have both successful and problematic series.
When buying, pay attention to the warranty and availability of service centers. Repair of serious damage (for example, a cut in the bottom of the snag) is better to trust professionals using original materials and technologies. Homemade repairs with “instant” glue are often temporary. Durability of the boat It depends on the quality of service.
The optimal choice for most users is the domestic model 390 cm with NDNDND bottom and PVC density 900-1100 g / m2. This is a balance of price, weight and reliability.
Results of selection and recommendations
A 390 cm boat is a serious purchase that will last you many years with proper care, a versatile tool for fishing, hunting and family recreation, and the key to choosing is to clearly define your priorities: whether you want speed and ease (LDND) or maximum speed and rigidity (Pyol), both of which are eligible for life.
Don't skimp on accessories and glue quality. A cheap boat can fail at the most inopportune moment, and repairing on the water is a thankless and dangerous occupation. Investing in a quality product from a proven manufacturer will pay off with peace and security on the water. Remember that water does not forgive mistakes, especially when it comes to boats.
In conclusion, before buying, try to find a way to sit in your chosen model, assess the rigidity of the floor and the build quality. Visual inspection and tactile sensations often say more than any specifications in the catalog, successful purchase and seven feet under the keel!
Where to buy spare parts and remixes?
It is best to purchase remixes (liquid PVC, fabric, valves) of the same brand as the boat. Materials from different manufacturers may have different chemical bases, which will lead to poor adhesion of the adhesive.
FAQ: Frequently asked questions
What is the maximum weight that can be loaded into a boat 390 cm?
The capacity varies depending on the model and volume of the cylinders. On average, for a length of 390 cm, the rated carrying capacity is 500-700 kg. However, the payload (people + motor + equipment) is usually limited to 350-450 kg for safe plane. Excessive load reduces speed and increases the risk of flooding.
Can I use a 390 cm boat in winter?
You can use PVC boats at temperatures up to -10 -- 15 degrees, but with caution. The material in the cold bluffs and becomes brittle. Any impact on the ice or a sharp object can lead to a crack. In addition, in the cold it is more difficult to ensure the tightness of the valves. Special winter models have more frost-resistant PVC.
How long does it take to assemble a boat with a NDND bottom?
It takes about 10-15 minutes for an experienced user to fully assemble and pump a 390 cm inflatable floor boat using a foot or electric pump. Pill models are assembled longer - from 30 to 50 minutes, as stringers and floorboards are required, which is a physically more costly process.
Do I need to register a 390 cm boat in GIMS?
Registration is required if the weight of the outfit (boat + motor + attachments) exceeds 200 kg. The 390 cm boat itself weighs 40-80 kg. If you put the engine weighing more than 120-140 kg (which is unlikely for such sizes), registration is not necessary.