When it comes to serious water tourism, night fishing or long walks through large reservoirs, compact single-seat boats no longer meet the needs of the owner. PVCThe model allows not only the fisherman to be placed on board, but also all the necessary cargo, while providing a high level of safety and comfort, not available to lighter analogues.
Modern technologies of production of polyvinyl chloride allow to create vessels with length from 3.8 to 5.5 meters, which have incredible strength and resistance to punctures. Five-metre PVC It can withstand up to 1 meter of turbulence, making it suitable for entering the open waters of Ladoga or the Gulf of Finland, and it is important to understand that the transition to a larger size dramatically changes the way the boat is operated, transported and stored.
The choice between a rigid hull and an inflatable one often leans in favor of the latter precisely because of its versatility. You can set up a camp on the shore and then in minutes prepare the vessel for descent. gas-cylinder Larger sizes require careful attention to assembly details, as errors can be costly. In this article, we will discuss all the nuances that the future owner of a large inflatable vessel needs to consider.
Criteria for the selection of dimensions and body design
The first thing a buyer faces is the need to determine the optimal length: Large boats usually start from 380 cm, but comfort begins from a size of 420-450 cm. loading capacity It allows you to carry 3-4 people or a significant amount of equipment without critically reducing driving performance, smaller sizes can be overcrowded with two adult passengers and a minimum set of things.
The bottom design is crucial to the behavior of the vessel on the water. NDMA It's a low-pressure inflatable floor that provides excellent hydrodynamics and allows you to achieve high speeds. Unlike the solder floors, there are no hard elements to assemble, which greatly speeds up the preparation process. NDT It takes longer to pump than installing plywood slates.
An important aspect is the number of inflatable tubes. Large boats often have 5 or more independent compartments, which increases the survivability of the vessel when punctured. quill-system And if you're not using a hard keel or an inflatable keel, you're also critical for course stability at high speeds, and if you don't have a hard keel or an inflatable keel, a long boat will scour and it'll be worse to keep its trajectory, especially in lateral winds.
⚠️ Note: When choosing a large boat, be sure to check the availability of the boat. timber It's not just a decorative element, it's a shield against impacts on the pier, rocks and foreign objects, and the absence of reinforced timber on a large model significantly reduces its lifespan.
Materials and strength: what to look at
The basis of durability of any boat is the material of cylinders. For large boats, a five-layer reinforced vessel is used. PVC The fabric must be resistant to ultraviolet radiation, fuel and lubricants and mechanical damage, and cheap analogues with lower density may not withstand loads at full load of the vessel.
Special attention should be paid to the quality of the seams. Large models use technology. hot-glue (Hypalon or specialty glue for PVC), which ensures the monolithic structure, cold gluing or the use of glue of questionable quality on large areas of contact of cylinders is unacceptable, since the risk of stratification under pressure of air and water is much higher.
The equipment must also be in accordance with the class of the boat. Leir ringsThe stainless steel or high-strength plastics must be used in the mooring ducks and the carrying handles. The aluminum alloys in seawater are quickly oxidized, so their use in the loaded assemblies of large boats is limited. Check the reliability of the transom attachment, as this is the main load from the motor.
- 🛡️ Tissue density: The optimal choice for a universal large boat is considered a material density of 900-1000 g / sq.m.
- 🔥 Seam technology: Look for a marking about gluing overlapping with temperature treatment of the edges.
- ⚓ Bottom protection: The presence of an additional tread belt ("prival timber") on the bottom of the cylinders.
The Secret of PVC Longevity
Sunlight is the main enemy of polyvinyl chloride. Even the most expensive stabilizers will not save the material from destruction when constantly under direct sun in a pumped state. Always use a protective cover or awning if the boat remains on the water or shore in sunny weather.
transom part and selection of motor group
The trawler of a large boat is a high-risk and responsible area. This is where the engine is attached, creating vibrations and traction. For models longer than 4 meters, a transom of multi-layer water-resistant plywood with fiberglass reinforcement or an aluminum profile with a wooden base is recommended. The hinged transom on large boats is less common due to the risk of deformation, preferably built-in option.
The choice of engine depends on the passport power of the boat and the desired speed specifications. four-meter-hull A 9.9-15 hp engine is usually enough to get a two-passenger boat to plane. Five-meter models require 18-20 hp or more. It is important not to exceed the manufacturer's recommended power, as this can lead to transom tearing or overturning the vessel.
The height of the transom also matters: Standard height is 381 mm (15 inches) or 508 mm (20 inches) for a long leg. Incorrect height picking will either lead to propeller air capture and cavitation or increased water resistance. Adjusting the motor's position along the transom allows you to find the optimal angle of the trim for maximum efficiency.
| Boat length (m) | Recommended power (hp) | Max. load capacity (kg) | Kit weight (kg) |
|---|---|---|---|
| 3.80 | 9.9 - 15 | 600 - 750 | 45 - 55 |
| 4.20 | 15 - 20 | 800 - 900 | 60 - 75 |
| 4.50 | 20 - 30 | 1000 - 1200 | 70 - 90 |
| 5.00 | 30 - 40 | 1300 - 1500 | 85 - 110 |
When operating with a powerful motor, it is critical to use tether It's a sliver that's attached to the sliver on the bow of the boat and to the transom, and if the engine is destroyed or lost at full speed, it's going to prevent it from sinking. For large boats with powerful engines, it's not just a recommendation, it's a necessity.
☑️ Checking before getting on the water
Comfort and ergonomics on board
A large boat implies a long stay on the water, so the issues of comfort are given special attention. soft-seat Or installing rigid cans on adjustable racks allows you to choose a convenient fit. Fishing often requires platforms for the installation of sonars, rod holders and tables that are easily mounted in special nests (lin tents).
The interior of large models is often divided into functional areas, the nose can be equipped with an inflatable sofa for rest, and the center part is occupied by a cockpit for control. float-deckNot only increase comfort, but also create an additional air cushion, increasing unsinkability.
An important element is the water vent system, and in large boats, you usually have one or two bottom valves (drain valves) located at the lowest point of the cockpit, which allow you to remove the water that has entered without tilting the vessel, and the quality of the valves must be perfect to prevent the water from being sucked from the outside.
⚠️ Warning: Never use open flames (gas burners, bonfires) in the vicinity of a pumped boat. Even a brief heating of PVC above 60-70 degrees can lead to softening of the glue and loss of leakage of the seams, and in the worst case, to ignition.
For storage of things there are special bags-handuks, which are attached to the sides or placed in the nose locker. In large boats, the amount of usable space allows you to take with you a tent camp, fuel and food for several days of autonomous navigation.
Use special EVA mats on the boat floor, which are not only pleasant to the touch and do not slide, but also protect the bottom of the PVC from abrasion with the soles of shoes and sharp objects, prolonging the life of the main material.
Transportation and storage of large models
Transporting a large boat is a separate logistical task. five-meter It can weigh up to 100 kg and take up a significant amount of space, so having a reliable wheeled transport device (transhoe trolley) is a must, and without it, moving the boat from the car to the water will become a torment for the back.
Car transportation often requires removing the rear seats or using the roof trunk, which is not always convenient and safe because of the size of the package. Many owners of large boats prefer to store them in the garage half-assembled or purchase special trailers for water equipment, which eliminates the need for constant assembly and disassembly.
Storage in winter requires a temperature regime, and although modern materials are frost resistant, it is better to store the boat at plus temperature, in a straightened form, without sharp folds. Long-term storage in a compressed state under load can lead to the appearance of "cracks" on the fabric, which subsequently become weak points.
- 🚗 Dimensions of packages: Pre-measure the trunk of the car. Package of a 5-meter boat can reach 120x50x40 cm.
- ❄️ Winter: The ideal storage temperature is from +5 to +20 degrees Celsius in a dry room.
- 🧼 Preparation: Before packing, the boat should be thoroughly washed and dried to avoid mold and oxidation.
Field maintenance and repair
Even the most reliable large boat requires maintenance. Regularly checking the pressure in the cylinders is the first rule. A pumped balloon in the sun can burst, and a malignant one can deform. Use a pressure gauge because eye pressure is impossible to determine, especially for BND, where the working pressure is only 0.2-0.25 atm.
Repair kits that come with the boat should always be at hand. For large punctures or cuts, there are special patches and two-component adhesives that allow you to restore leakage even in the field. The repair technology depends on the type of material, so manufacturer It should be studied in advance.
After each operation, especially in salt water, the boat must be rinsed with fresh water, the salt crystallizes and can damage the fabric and fittings, and it is also worth checking the condition of the valves and lubricating them with silicone if necessary to prevent sticking.
Regular maintenance and proper drying before storage increase the service life of a large PVC boat by 2-3 times, maintaining its operational properties for 10 years or more.
What pressure should be in the cylinders of a large boat?
The pressure depends on the type of cylinder. In the main high pressure cylinders, it is usually 0.25-0.3 MPa (2.5-3.0 atm). At the bottom of the NDNDT, the pressure is much lower - 0.2-0.25 atm. Always check the data-sheet figures of a particular model, since excess pressure in the sun is dangerous.
Can I use a large PVC boat in winter?
Yes, special winter models made of frost-resistant PVC (up to -40°C) are designed for use in the cold season, but a regular summer boat can not be used at sub-zero temperatures - the material becomes brittle and can crack when impacted or bent.
How many people can comfortably fit in a 4.5-meter boat?
Formally, the payload capacity is 4-5 people, but for a comfortable fishing or walk with equipment, the optimal number is 2-3 adults, which will ensure free movement and safety.
Do I need to register a large boat in the GIMS?
Under Russian law, registration is subject to small vessels weighing more than 200 kg (complete with an engine) or with an engine capacity of more than 8 kW (about 10.8 hp). Since large boats often weigh more than 100 kg on their own, and engines are more powerful than 10 hp, registration and the availability of rights category "M" is most often required.