The modern market of inflatable floating crafts offers an incredible variety of models, among which NDN (Low Pressure inflatable floor) is the most popular, a middle ground between heavy, hard-floorboard boats and lighter, but less stable, rowing models, and the lack of rigid design makes them incredibly easy to transport and assemble, which is especially appreciated by fishermen who reach water bodies by public transport or their own car.
However, buying a boat like this isn’t just about choosing a beautiful color or brand. Technical specifications The quality of the material, the quality of the seams, the design of the cylinders and the type of inflatable floor play a crucial role in the safety and comfort of the water, and making a mistake in choosing can cost money, but also ruin the entire fishing or recreation season.
In this article, we will discuss in detail all the nuances that you need to consider before buying, you will learn why fabric density is not always the main indicator of quality, how do transom canopies differ from glued ones and how to choose the right size of the vessel for your specific tasks.
Design features of boats with inflatable floor
The main feature of these boats is low-pressureUnlike high pressure models (HPVD), where the bottom is inflated to a hard board, it uses a special system of strap stretchers inside the cylinder, which allows the floor to take a flat shape, but remain soft enough for a comfortable package.
This design provides excellent seaworthiness The soft bottom acts as a shock absorber, extinguishing the impacts on the water, which makes the swim smoother even with a little excitement. In addition, the lack of hard elements allows you to roll the boat into a compact backpack that can easily fit into the trunk of the sedan.
⚠️ Attention: The inflatable floor of the NDND is sensitive to puncture by sharp objects on the shore. Always check the place of the boat's descent for branches, stones or thorns to avoid damage.
An important element of the design is kielson It's an inflatable beam that runs all the way down the bottom, and it gives the boat longitudinal rigidity and improves its course stability, and without a quality pendant, the boat can scour the water, especially when it's going against wind or current.
What is the difference between NDNDD and NDDD?
Low-pressure boats have a soft bottom that folds easily but requires more careful operation. NDVD boats have a plywood-hard bottom, they go faster for planing, but are heavier and bulkier in transportation.
Materials and density of PVC: myths and reality
When choosing a boat, buyers often chase the maximum. tissue-density, believing that 1100 g/m2 is always better than 750 g/m2. This is a common misconception. Density is just one of the parameters, and different tasks require different materials. Lightweight fabric (750-850 g/m2) is ideal for single boats and calm water, as it is significantly lighter.
Heavy. reinforced PVC (900-1100 g/m2) is really more resistant to abrasion and puncture, but it's much heavier. If you're planning to haul a boat alone or go fishing in rocky rivers, then high density is justified. Otherwise, overpaying for weight may not be feasible.
Particular attention should be paid to quality reinforcement It's the one that holds the load, not the plastic itself. It has to be elastic, odorless, uniformly colored. Cheap analogues often have a nasty chemical smell that doesn't wear off for years.
Smell the material when buying. The pungent, pungent smell often indicates the use of poor-quality plasticizers, which can make the fabric brittle over time.
Technologies of jointing seams: glue or welding?
The longevity of a boat depends on how its elements are connected. There are two main methods: bonding and heat-welding (Hypalon or PVC) Glued seams made with two-component polyurethane adhesive are considered classics and, when executed correctly, are very reliable.
Welding technology involves fusing layers of material under high temperature and pressure, and this seam is monolithic, excluding bundling. However, welding requires expensive equipment and highly skilled personnel, so quality welded boats are more expensive.
- 🔥 Welded seam: It can withstand the load on the break, is not afraid of moisture during gluing, but is difficult to repair in the field.
- 💧 Glued seam: It is more repairable (you can glue it on a hike), but requires regular inspection and care of the adhesive layer.
- 🛡️ Combined method: It is often used in the premium segment, combining the advantages of both.
When inspecting the boat, pay attention to flounder In quality products, they are smooth, without bubbles or glue stains, and any defect in the seam is a potential point of depressurization in the future.
Dimension and load capacity: how not to make a mistake
The choice of size of the boat is a balance between comfort, weight in the assembled form and the necessary load-carrying capacityMany beginners buy a boat "back-to-back" in terms of the number of passengers, forgetting about the weight of the engine, fuel, equipment and equipment.
There is a simple rule: rated carrying capacity must exceed the real weight of the crew and cargo by at least 30%. height Overloaded boat becomes sluggish in handling, worse wavehold and has an increased risk of getting a "splash" (water flooding).
| Type of boat size | Length (cm) | Width (cm) | Passenger capacity | Recommended motor (hp) |
|---|---|---|---|---|
| Single-seat | 240-280 | 110-120 | 1 person. | 2.5 - 5 |
| Double-seat | 290-330 | 130-145 | 2 people. | 5 - 9.9 |
| Three-seater | 340-360 | 145-155 | 3 people. | 9.9 - 15 |
| Four-seater | 370-400+ | 160-180 | 4 people. | 15 - 25 |
Consider it, too. packaged dimensionsA three-seater boat in a package can weigh 40-50 kg, which is a limiting load for one person. If you plan to go out alone, it may be worth considering a slightly smaller model.
Furniture and additional elements of comfort
Comfort on the water is made up of small things. fittings These are valves, handles, rings and attachments for attachments, and the valves must be reliable, protected from sand and dirt, and allow for rapid air venting.
Pay attention to the presence squirrel-shaftSome models have glued them, which increases the rigidity of the structure, but increases the weight and dimensions. Removable canopies are more convenient to store, but take time to install. sonar and rod holders.
It will not be superfluous to have elements such as pockets For the little things, drane All of these parts must be sewn or glued with technology, without sticking out threads or bumps.
☑️ Checking the completeness before buying
Operation and care: extending the life of the boat
Proper care of the boat NDND can increase its service life many times. freshwaterAnd especially if you've been swimming in a salty water body or in a polluted river, sand and salt destroy the PVC structure and the adhesive seams.
Drying is a critical step. Packing a wet boat leads to the appearance of a squirt. mold And it's a fungus that not only damages the look, but also corrodes the fabric, and you need to dry the boat in the shade, avoiding direct sunlight, which can cause local overheating and deformation of the material.
⚠️ Warning: Never leave a pumped boat in direct sunlight for long periods of time unattended, and the pressure inside the cylinders can rise to critical levels and cause the seams to rupture.
Keep the boat in a warm room, if this is not possible, make sure that there are no rodents in the storage area that can chew PVC.
Regular washing and complete drying before packaging are the main enemies of aging PVC boats. Ignoring these rules reduces the service life of the product by 2-3 times.
Can I use a NDND boat in winter?
Using PVC boats in subzero temperatures is possible, but it requires extreme caution. The material in the cold swells and becomes brittle. Any sloppy movement, impact on the ice or bending can lead to cracks. If you can't avoid the exit, pump the boat in the heat, and in the cold just add pressure to normal without pumping.
What is the optimal pressure in the cylinders?
The operating pressure is usually 0.2 atmospheres (about 200 mbar or 2.8 PSI), which is dangerous to exceed, especially in hot weather. Always use a pressure gauge for monitoring, since it is impossible to determine the exact pressure by eye.
Do I need to register a NDND boat?
According to the current rules of the State Institute of Transport and Industry of Russia, 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 10.88 hp). If your boat is lighter and the engine is weaker, registration is not required, but you need to have documents for the boat and the engine with you.