Modern angler or tourist can no longer imagine their leisure without a reliable boat, able to deliver to the cherished fishing point quickly and comfortably. PVC boats with motorized transom They have become the gold standard in this niche, supplanting heavy metal counterparts and simple rowing models, driven by a unique combination of mobility, load capacity and useability. mounted-engineThis changes the way we plan our routes.
Choosing a boat like this is not just about buying an inflatable cylinder, it's about acquiring a complex engineering design where every element, from the thickness of the bottom to the way the transom is attached, affects the final speed and safety. Unlike boats without a motor, the stiffness of the stern and the ability of the structure to withstand the vibration of the running engine are critical. The optimal length of the transom board for stable glittering should be at least 90% of the width of the cockpit in the aft. This parameter is often missed by beginners, focusing only on the power of the engine.
In this article, we will discuss in detail how to choose the right boat for your tasks, what technical nuances to pay attention to when buying and how to avoid fatal errors during operation. Understanding the physics of movement of the inflatable hull will help you save fuel and extend your life. granule And the engine for years to come.
Design features of transom boats
The main difference between these models is the presence of a rigid insert in the aft part, which serves as a support for the engine. turretIt can be made of moisture-resistant plywood, composite materials or reinforced plastic, and it takes the main traction load, so its attachment to the cylinders should be as reliable as possible. In quality models, a system of slings covering the cylinders is used, which allows you to evenly distribute the force.
The bottom of the boat is also key, and it's not enough to go into the plane with a motor, but it's using technology. BND (low pressure inflatable floor) Or hard floorboards made of aluminum profiles and plywood, the former providing comfort and speed, the latter - maximum rigidity and load capacity, but lose in weight and build time.
- 🚤 The slingboard should have an anti-corrosion coating, especially if you plan to use a boat in salt water.
- 🚤 The inclination angle of the transom is usually fixed, but quality models allow you to adjust it with the help of gaskets or movable fasteners.
- 🚤 The presence of keel protection at the bottom is mandatory to prevent damage when entering unequipped shore.
⚠️ Warning: Never use homemade adapters to increase the height of the transom unless the standard height is right for your motor. This creates a dangerous lever that can break the stern of the boat at full speed.
It is also worth mentioning quill These are longitudinal stiffness elements that go from the transom to the cockpit, and they prevent the bottom from being deflected by the weight of the motor and passengers, which is critical to maintaining driving performance, and without the keelson, the bottom becomes a sail, which slows the boat down and increases fuel consumption.
Calculation of motor power and load capacity
One of the most common mistakes is to install a motor that is too powerful or, conversely, weak. Load capacity Boats are not only the weight of passengers, but also the weight of the boat itself, equipment, fuel and engine, and exceeding the permissible limits leads to a decrease in the board above the water, which increases the risk of flooding with the wave and loss of stability.
To get on plane, you need the power of the motor to match the length and width of the hull. A low-power engine will only create a wave, but it will not be able to put the boat into slip mode. At the same time, excess power can lead to the collapse of the transom or the tipping of the boat in a sharp maneuver.
Use the rule: 1 hp for every 20-25 kg of full load for confident glides. For displacement mode (slow speed), 1 hp for 40-50 kg is enough.
And you also need to consider wind load and current strength, and if you're going to go through large reservoirs, which are often wave-like, you need to have a higher power reserve than you would for calm rivers, and you need to be able to steer your course against the wind without running at the speed limit.
| Boat length (m) | Recommended power (hp) | Maximum load capacity (kg) | Mode of traffic |
|---|---|---|---|
| 2.8 - 3.2 | 2.5 - 5 | 250 - 350 | Water-displacement/plane-based |
| 3.2 - 3.6 | 5 - 9.9 | 350 - 500 | planing (planing) |
| 3.6 - 4.2 | 15 - 20 | 500 - 700 | Confident glossing |
| 4.2+ | 20 - 40+ | 700+ | High-speed |
Their thrust is measured in pounds (lbs), and to convert to horsepower, you need to divide the thrust value by about 30-35, although this is quite arbitrary because of different torque specifications.
Bottom types: BND vs. floorboard
Choice between low pressure inflatable floor (NDMA) and a hard floorboard bottom is the buyer's eternal dilemma: NDND is a construction of bulkhead cylinders that inflate to high pressure (usually 0.8-1.0 atm), which is assembled in 5-10 minutes, has excellent driving qualities and a soft bottom on which you can walk without knees.
Piol boats are made of individual plates (floorboards) connected by an aluminum profile, and it's a constructor that takes time to build, but gives a completely rigid platform, and it's easier to fish standing up, it's better on course, and it's less susceptible to side winds sailing because of the flat bottom.
- 🛶 NDND is lighter and more compact in assembled form, ideal for frequent trips "light".
- 🛶 The solder boat is more repairable: it is easier to replace one board than to seal the complex seam of the inflatable floor.
- 🛶 Speed on NDNDM is often higher due to better streamlining and less weight of the structure.
The secret of speed on NDND
Inflatable bulkheads create additional volume to push the stern, which reduces water resistance, but in shallow waters, the risk of breaking the bottom of a rock is higher than in boats with protective tape around the perimeter of the hard bottom.
For anchor fishing and trolling, many prefer floorboard because of its rigidity and the ability to install additional mounts directly on the floor. However, modern models of keel-enhanced and dense fabric (900-1100 g / sq.m) successfully compete with them in all conditions.
Installation and fastening of the hinged motor
Proper installation outboard The engine rods should cover the transom board tightly, without backlashes. Between the metal and the surface of the transom (especially if it is plywood), it is recommended to lay rubber or plastic linings to avoid damage to the coating and improve traction.
The height of the DW setup is critical. If the engine is lowered too low, water resistance increases and the risk of hydraulic shock when cornering; if it is too high, the propeller captures air, overheats the engine and loses traction; optimal position is when the anti-cavitation plate is 10-20 mm below the bottom line of the boat when driving.
⚠️ Warning: Check the safety cable's safety checks before each launch, which may cause the boat to move around uncontrolled in a circle if the operator falls overboard.
When installing an electric motor, it is important to monitor the direction of rotation of the screw and the absence of foreign objects in the water. Traction batteries Place them strictly in the center or closer to the transom for balancing, securing them so that they do not shift when rolling. Shifting the center of gravity can lead to differentiation on the nose or stern, which will impair handling.
☑️ Pre-launch checks
Tuning and useful accessories
The basic equipment of the boat is rarely ideal for specific fishing tasks. junctionIt allows one person to easily move a heavy motorized boat and battery along the shore without lifting it. The wheels must be inflatable and wide enough to pass through sand or grass.
For comfort and functionality, soft seats with adjustable features, locks for storing things and tables are often installed. Special attention should be paid to holders of rods and sonars. Modern mounts allow you to fix sonar sensors on the transom or bottom, providing a stable signal without unnecessary wires in the water.
Inflatable beams (side cylinders) can be supplemented with a PVC or aluminum pier, which will protect the sides from abrasion on the piers and stones, and will also allow you to conveniently fasten various accessories. anchor-winch or at least a high-quality anchor shaft with a carabiner will greatly simplify the process of anchoring on the flow.
Trans wheels are not a luxury, but a necessity if you often change descents or travel alone, they save energy and keep your back.
Safety and care of PVC materials
PVC is strong, but it's not invulnerable. Polyvinyl chloride's main enemies are ultraviolet, sharp objects and improper storage. Long exposure to direct sunlight causes the fabric to age, it becomes a brittle and can burst on the wave, so using an awning or keeping a boat in the shade is mandatory.
After each operation, especially in salt water or muddy water, the boat must be washed with fresh water and thoroughly dried before packaging. Wet packaging is a guarantee of mold and destruction of adhesive seams. Drying should be in the shade, because heating wet fabric by the sun can lead to deformation of the seams.
- 🧼 Use only specialized PVC chemicals, avoiding aggressive solvents and gasoline.
- 🧼 Regularly check the pressure in the cylinders with a pressure gauge, avoiding pumping in the heat (the air expands).
- 🧼 Keep the boat straightened or neatly rolled up, avoiding creases in the same places.
⚠️ Warning: Never keep a PVC boat assembled for a long time, and constant stress on the transom and attachment points can lead to irreversible deformation of the structure.
Small punctures and cuts are easily repaired at home with a remix, the main thing is to degrease the surface and use glue that corresponds to the type of fabric (for PVC and Hypalon adhesives are different!).
How often should I lift a boat on a hot day?
In hot weather, the air inside the cylinders expands. If you pump the boat in the morning at +20 ° C, and in the afternoon the temperature rose to +35 ° C, the pressure can rise by 10-15%. It is recommended to pump the boat to 0.2-0.3 atm below nominal value if a severe heat is expected, or periodically blow out excess air, checking the pressure with a pressure gauge.
Can I use a gasoline engine on a boat with NDND?
Yes, you can if the engine power does not exceed the manufacturer's recommendation, but for lighter models of NDNDM, two-stroke motors of lower power or electric motors are better suited, since they are lighter and create less vibration that is transmitted to the soft inflatable floor.
What to do if the squirrel begins to bend?
If the transom is deflected, it's a dangerous sign. If it's a temporary deformation under load, it might be too powerful. If the deformation is permanent, it's broken, it's broken, it's broken, it's broken, it's got to stop operating immediately, it's got to take off the engine, it's got to defective, it might need to replace the transom board or reinforce the structure.
Which screw is better to choose for planing?
To go full load plane, you often need a smaller pitch screw than the standard one. It allows the engine to gain speed faster and reach power. If the boat doesn't get up to plane, try replacing the screw with a model in increments of 1-2 inches less than the standard one.