The choice of a 4200mm long swimmer is often a turning point for any hydraulic motor. middle-of-the-road between compact two-seat models and full-fledged keel boats capable of carrying trophy catches. PVC 420 for an outboard motor It combines excellent seaworthiness, the ability to install a powerful engine and enough space to accommodate a crew of three or four people.
However, buying a vessel of this size requires a balanced approach, not only the cost and appearance, but also the design features that directly affect your safety on the water. Inflatable boat More than four meters long is no longer a simple toy for a quiet lake, but becomes a serious projectile that requires attention to the quality of seams, material density and reliability of fittings.
In this article, we will take a closer look at what the 420 label is, how to choose the best bottom configuration, and which engine will be the perfect companion for your new vessel, learn about the intricacies of operation that beginners often miss, and understand why this size is so popular among professional fishermen and water lovers.
Design features and geometry of the body
The overall length of 420 cm is not just a figure, but a class of swimmers with their own specifics. loading capacity This allows you to comfortably accommodate not only a fisherman with tackle, but also full-fledged equipment for multi-day camping or diving equipment.
The most important element of the design is cross-boardOn models 4.2 meters long, it is usually reinforced, as it is capable of carrying engines up to 30-40 hp and even higher, depending on the manufacturer. It is the transom that takes the main load when planing, so its rigidity and angle of inclination are critical for handling.
The shape of the nose is also key. Most modern models are equipped with a new design. keel Or a hard forehead, which allows you to effectively break the wave, and when you move at speed, the soft nose cushions the impacts on the water, providing a smoother ride than the hard-hull counterparts of small size.
When buying, pay attention to the presence of a hinge beam around the perimeter, which protects the sides from abrasion on the berths and allows you to attach additional accessories, which is especially important for long boats.
Types of bottom: inflatable keel against solder floor
One of the most difficult questions to choose is the type of bottom, and for a length of 420 cm, manufacturers offer two main solutions: keel (NDND) or flat-floor (Aluminum or plywood boards) Each option has its own proponents and objective advantages.
Models with low-pressure (BND) are assembled as quickly as possible. You don't have to spend time laying stringers and docking floorboards. You just spread the boat, pump the cylinders and keels, and it's ready to go down. These vessels have excellent fluid dynamics, because the bottom is a single smooth surface without joints.
Pied boats, in turn, provide a stiffer platform. cruising on a flat floor of laminated plywood or aluminum is much more convenient, especially if you plan to actively fish with spinning or pike on the granaries. However, the process of assembling such a "designer" can take from 20 to 40 minutes, which in the cold wind or in a hurry becomes a significant disadvantage.
The secret of rapid assembly of solder boat
Always start laying the floor on the nose and move to the transom, which avoids gaps and distortions in the critical area of the engine installation.
- 🚤 NDMA Ideal for those who value time and want to build a boat in 5-7 minutes.
- 🛠️ Paiola - The choice of perfectionists who need a completely flat "deck" for comfortable fishing.
- ⚖️ Weight. Inflatable bottoms are often lighter, but soldering systems may be more maintainable in the field.
Selection of motor group for boat 420
Engine selection is a task that requires accurate calculation. A boat 4.2 meters long usually has the recommended engine power in the range from 15 to 40 hp. gelling It's full load, and an overly powerful motor can overload the transom and upset the balance.
For single fishing or cruising together often enough "fifteen" or "twenty" These engines are economical, easy to transport and provide a speed of about 30-35 km / h. If you plan to take on board three people or heavy equipment, it is worth considering options with a capacity of 25-30 hp.
The important parameter is the length of the daydwoot. Inflatable boats are most often suitable motors with a short leg (S), however, some models with a high balloon may require a standard length (L). squirrel It was at the right level relative to the bottom.
☑️ Check before buying the engine
Fuel economy is also important. Two-stroke engines are easier to maintain and lighter, but they require a mixture. Four-stroke units are quieter, more economical and more environmentally friendly, but they are heavier and more expensive. For a 420 cm boat, the weight of the engine is not as critical as for small models, so many people lean aside. four-stroke for comfort.
Materials and quality of execution
The durability of your boat depends on the quality of the material. Most modern boats 420 cm are made of reinforced PVC The density of the tissue usually varies from 750 to 1100 g/sq.m. The denser material is more resistant to puncture, but has a greater weight.
The key is the technology to connect parts, and there are two main methods: gluing and welding (glueing with hot air). Welded seams They're considered more reliable and durable because the balloon material and the seam becomes monolithic. The adhesive compounds can also be very strong, but they require high-quality two-component polyurethane adhesives.
⚠️ Attention: When inspecting the boat, pay special attention to the area around the valves and in the places where the slings are glued, and this is where problems often arise when using poor-quality glue or disrupting production technology.
The fittings must also be made of reliable materials. Plastic elements are quickly destroyed by ultraviolet light, so it is preferable to use stainless steel or high-strength composites. Rump-bolts., holders of rods and leer rings should sit tightly, without backlashes.
The quality of the seams is more important than the density of the fabric, and a boat made of thin material with perfect welds will last longer than an armor-piercing PVC with poor gluing.
Comparative table of popular models
To make the choice easier, we have compared the specifications of several popular models on the market, and the data can vary slightly depending on the year of production and configuration.
| Model | Length, cm | Width, cm | Load capacity, kg | Max. Power, hp. | Type of bottom |
|---|---|---|---|---|---|
| Flagship 420 | 420 | 190 | 900 | 40 | NDNDM/Pyol |
| Hunter 420 | 420 | 180 | 800 | 30 | pyol |
| Aqua 420 NDLD | 420 | 195 | 850 | 35 | Inflatable keel |
| I've got 420 NC | 420 | 185 | 750 | 25 | Inflatable keel |
| WinBoat 420R | 420 | 192 | 880 | 40 | Reika/Pyol |
As you can see from the table, even within the same size, there is a range in width and carrying capacity. Wider models (190+ cm) provide better stability, but can be less pivotile. Narrow boats accelerate faster, but require more careful handling in choppy conditions.
Transport and storage
The 420 cm boat, assembled, takes up considerable space, and when packaged, it consists of 3-4 bags weighing 20 to 40 kg each (depending on the type of bottom). boot with elongated crossbars.
When stored in winter, it is important to observe the temperature regime. Although modern materials can withstand frosts up to -30 ° C, it is strictly forbidden to inflate the boat or bend it in the cold - PVC becomes fragile. The optimal temperature for assembly and pumping is above +5 ° C.
- 🏠 garage - an ideal place that protects against ultraviolet light and temperature changes.
- 🚗 Trailer It is a convenient solution for those who do not want to assemble and disassemble the boat every time.
- 📦 balcony It is permissible only if there is protection from direct sunlight and frost.
⚠️ Attention: Never keep the boat pumped up in direct sunlight in summer, and the pressure inside the cylinders can rise to critical levels, causing the seams to rupture.
Frequently Asked Questions (FAQ)
Do I need to register a boat with a 420 cm engine in GIMS?
Yes, if the weight of the curb boat with the installed engine exceeds 200 kg. Since 420 cm boats are usually heavier than small models, and the engines are installed on them are powerful, the total weight often exceeds this threshold.
Which glue is best used for PVC repair?
For quality repairs, use two-component polyurethane adhesives (such as Kleyberg, Texacol or specialized adhesives from the boat manufacturer). Single-component adhesives are only suitable for temporary repair or gluing of light elements.
Can I use a 420 cm boat to go to sea?
This is only possible if you have a certificate and have favorable weather conditions. However, high seas with a large wave is not an element for inflatable boats. The permissible wave height is usually limited to 25% of the height of the board. For sea walks, models with high cylinders and an inflatable keel are preferable.
How often do I need to pump the boat?
It is recommended to check the pressure before each fishing. In hot weather, the pressure may increase and it may have to be ejected. In cold weather or after a night on the water, the pressure drops, and the boat must be pumped to working condition (usually 0.2-0.25 atm).