Choosing a swimming vehicle is always about finding a balance between portability, load capacity and comfort on the water. PVC Hydra NDND It's a benchmark solution that combines the reliability of classic inflatable boards with the rigidity of a full-fledged body, and a low-pressure inflatable floor design that allows you to forget about assembling a complex solder floor, saving time and effort before each step into the water.
Unlike models with a rigid plywood or aluminum bottom, the series of NDNDM from the manufacturer "Hydra" offers a unique geometry of keeliness, which has a positive effect on driving performance. inflatable floor It's not just a plywood replacement, but a full-fledged wave-blower design that makes swimming more predictable and safe, even in less than perfect weather conditions.
Considering PVC Hydra boatsThe dense fabric, reliable seams and well-designed fittings create the safety margin necessary for operation in harsh Russian realities. In this article, we will discuss in detail why this series is in stable demand and how to choose the optimal length for your tasks.
Design features and technology of BNDT
The basis of any model of the series is technology. NDMA (Low Pressure inflatable floor) Unlike classical solder boats, where the bottom is assembled from separate sheets of plywood or aluminum, a single stringer cylinder is used, which allows for high bottom rigidity without the use of heavy metal or wooden elements. Construction of the Hydra boat Matres the presence of an inflatable keel, which in combination with the bottom forms a pronounced V-shaped shape.
An important aspect is the stringer system, and Hydra boats use strong tapes that run inside the bottom cylinder and connect the nose and the transom, and when pumping the balloon, these stringers are pulled, creating a "drum membrane" effect. It is the correct tension of stringers that ensures the flatness of the bottom and the ability to plane with minimal fuel consumption. If you ignore this stage, the driving qualities will significantly decrease.
⚠️ Attention: When assembling a NDND boat, it is strictly forbidden to pump the cylinders into the sun until the transom board is installed and final assembly is complete. Excessive pressure during heating can lead to rupture of the seams or deformation of the cylinder.
The hydra trays are reinforced with additional overlays and moisture-resistant plywood inserts, which are necessary to understand the loads from the hydraulics. outboardThe transom fastening is designed to prevent engine displacement even in sudden maneuvers or shocks to the wave, and the use of high-quality glue and double gluing of the seams ensures tightness in the docking areas of the bottom and sides.
Advantages of inflatable floor before floorboard
The debate over whether floorboard or NDND has been going on for years, but the inflatable floor has some undeniable advantages, especially for mid-size models. The first thing that catches your eye is the speed of assembly. PVC Hydra boat With a puffy bottom, it takes 10 to 15 minutes, whereas the pyeols and stringers can take up to 40 minutes, and for a fisherman leaving at dawn, that's a significant argument.
The second factor is comfort, because the inflatable floor has excellent thermal insulation properties, and if you sit on a bottom like this without a seat, you don't feel the cold water, which is true for spring and autumn fishing, and the absence of hard elements inside the cockpit increases the useful volume. Passenger flow And the gear is more comfortable, because there's nothing that prevents you from moving inside the boat.
The third aspect is weight. HPD models are often lighter than their peer-to-peer counterparts of the same length, because there is no floor scoring board, which makes it easier to transport and load into the trunk of the car. However, it is worth considering that to go sleeve from HPD may require a slightly more powerful motor than for a hard bottom, due to the sailability and flexibility of the structure at high speeds.
Overview of the model range: from Hydra-2 to Hydra-4
The manufacturer offers a wide range of sizes, which allows you to choose the boat for specific needs. The Hydra range covers the segment from single “pillars” to full-fledged three-seater boats. Each length has its own balancing features and recommendations for engine power.
Models 280-290 cm long (e.g., Hydra 290They are ideal for single-handed fishing with a small supply of gear, easy to handle by one person, and a 5 hp motor allows you to confidently get on plane mode with one person on board, which is a great option for small rivers and lakes.
The middle class is represented by a length of 320-340 cm. Boat Hydra 320 NDND It's probably the most popular choice among station wagons, and it already allows two adults to comfortably fit, and it has a payload for an overnight stay with a minimum of things, and for that length, the optimal engine would be a 9.9 hp engine that accelerates the boat to speeds of 30-35 km/h.
The 360-390 cm (Hydra-360, Hydra-390) models are heavy inflatable boats designed for long-distance hikes, trolling or use with powerful engines up to 15-18 hp. Hydra 360 It has excellent seaworthiness and is capable of holding a wave that is not accessible to small models, but the weight of such a boat in the assembly can reach 70-80 kg, which requires a wheeled transom or trailer.
Technical specifications and comparison of models
To objectively assess the possibilities of various modifications, it is convenient to use a comparative table, which will help to understand how the load capacity and recommended power of the engine vary depending on the length of the body.
| Model | Length, m | Width, m. | Load capacity, kg | River. motor, hp. |
|---|---|---|---|---|
| Hydra 290 | 2.90 | 1.40 | 350 | 5-8 |
| Hydra 320 | 3.20 | 1.45 | 450 | 9.9 |
| Hydra 360 | 3.60 | 1.55 | 600 | 15-18 |
| Hydra 390 | 3.90 | 1.60 | 750 | 20-25 |
Analyzing the table, you can see a direct correlation: an increase in length by 30-40 cm gives an increase in the carrying capacity of about 100-150 kg. This is critical when planning the purchase of fuel and equipment for multi-day expeditions. Boat width It also plays a role in stability: wider models (from 1.55 m) are less prone to roll when a fisherman moves inside the cockpit.
Effect of length on glossing
The longer the boat, the higher the minimum speed of getting on plane. Hydra-390 may require a motor more powerful than 15 hp. or use hydrofoil for early entry into mode.
It is also worth mentioning the density of tissue. Hydra models usually use PVC with a density of 750 to 900 g/sq.m.900 g/sqm) is preferred for rocky shores and for high abrasive operation, although it adds weight to the article.
Operation and maintenance of the NDLB boat
Durability PVC-boat After every fishing trip, especially in salt water or muddy rivers, the product must be rinsed with fresh water, salt deposits and sand can act as an abrasive, damaging the protective layer of fabric and fittings, drying must be done in the shade, in the straightened form.
☑️ Post-season departure
Storage should be at a positive temperature. Although modern materials are frost resistant, flexing frozen PVC can lead to microcracks. The optimal storage temperature is from +5 to +20 degrees Celsius. Regularly check the pressure in the cylinders: in summer it can rise, and in winter it can fall, which requires adjustment.
⚠️ Warning: Never leave a pumped boat in direct sunlight for long periods of time unattended, and the air pressure inside the cylinders increases proportionally to the temperature, which can cause the seams to rupture.
To clean contaminants, use a soft sponge and special PVC products. Aggressive chemicals, solvents or gasoline can damage the structure of the material. Renovation of the Hydra boat at home is possible with the help of a remplekt, coming in the kit, but serious damage is better to entrust to specialists.
Choice of motor and attachment equipment
The right engine is the key to cruising pleasure. For NDND models, it is important to consider not only power but also the length of the lower unit. The short leg (S) is suitable for boats up to 320 cm, the long leg (L) is suitable for larger ones. transom plate on boats Hydra allows you to adjust the angle of inclination of the engine, which is critical for planing.
When selecting a motor for Hydra 320 Or 360, many owners lean toward the proven two-stroke Yamaha or Mercury, or their Chinese counterparts (Hidea, Tohatsu). Four-stroke engines are more economical and quieter, but heavier, which can be critical in differentiation for medium-sized inflatable boats.
To improve the performance of the Hydra boat, install the hydrofoil on the engine, which will allow you to quickly go to the plane and improve handling on turns.
For boats from 3 meters in length, the weight of the anchor should be at least 1/100 of the length of the boat in centimeters (about 3-4 kg). The use of an anchor rift fixed in the bow will facilitate maneuvering when fishing in windy weather.
Frequently Asked Questions (FAQ)
What is the real weight of the boat Hydra 320 NDND?
Weight depends on the density of the fabric and the configuration. On average, the boat Hydra 320 weighs about 38-42 kg in the basic configuration. With bags, pump and remix, the total weight can reach 45 kg.
Can I use the Hydra boat for fishing?
Yes, the design of the NDND and the quality of the seams allow the boat to be used in the coastal zone, but you should avoid rocky beaches and carefully monitor the weather forecast, since the sailing of the inflatable boat is high.
What pressure should be pumped into the cylinders and bottom?
The optimal working pressure for the sides is 0.2-0.25 atm, for the inflatable floor - 0.25-0.3 atm. It is important to use a pressure gauge at the pump, since it is difficult to determine the correct pressure by eye, and pumping is dangerous.
How many people are comfortably accommodated in Hydra 360?
Comfortably, the Hydra 360 can accommodate two adults with a full suite of gear, and a third passenger is possible, but it will significantly reduce speed and increase the ambient, turning the boat into a displacement mode.
Should the valves be lubricated?
Yes, rubber valve seals are recommended to be lubricated periodically with silicone lubricant, which will prevent rubber from drying out and ensure leakproofness for a long time.