Inflatable boats have long ceased to be just a means for short walks by the shore, becoming full-fledged tools for serious fishing and water tourism. For many owners, the question of switching from oars to traction becomes only a matter of time, since physical forces are not unlimited, and you want to catch large areas faster. motor-board PVC boat becomes one of the most popular elements of tuning, allowing you to install a reliable transom even on models that do not have a factory hinged transom.
Self-manufacturing or a competent choice of finished solution requires an understanding of the physics of the process and the properties of materials, because it is about the safety and stability of the entire structure on the water. Unlike hard aluminum, polyvinyl chloride (PVC) has the property of bending under load, which creates additional requirements for the system of mounting the power unit. In this article, we will discuss in detail all the stages of creating a reinforced site, the choice of materials and the nuances of installation, so that your boat becomes a reliable partner in the reservoir.
Before you start soldering or assembly, you need to decide on the type of design that will be optimal for your body. There are many variations in the design, from simple removable plywood to complex integrated systems, and the choice depends on the frequency of use of the engine and the owner's budget.
Types of designs of trans trans for inflatable boats
All areas under the electric motor can be divided into two broad groups: hinged and glued (integrated). Hinged versions, often called "transe boards", are attached to cylinders or banks (seats) using belts, frogs or rigid brackets. They are versatile, easy to remove when necessary and suitable for boats where there is no constant operation of the engine. However, such designs are limited in power and require very reliable fixation to avoid displacement of the center of gravity.
A glued transom is a rigid plate, which in the process of production or self-repair is glued between the cylinders in the bow or aft of the boat. transom board This is a solution that is considered more reliable for high-power electric motors, because the load is distributed directly to the cylinders and the bottom, bypassing movable elements like cans, but this approach has a disadvantage: the inability to quickly dismantle the site without losing leakage or using complex removable mechanisms.
A separate point to mention is hybrid solutions, where the removable area relies on a hard bottom (floorboard) or an inflatable keel. It is critical to consider whether the boat floor will withstand the point load from the engine legs and vibrations. Often, to distribute the weight under floorboards, additional sheets of plywood or aluminum are placed, which increases the overall weight of the equipment, but increases safety.
- 🚤 Hinged transes are ideal for periodic use and boats without built-in transom.
- 🔩 Plugged pads - provide maximum rigidity and stability for powerful traction.
- ⚖️ Hybrid systems – require reinforcement of the floor, but retain flexibility of configuration.
Selection of materials for site manufacture
The basis of any site is the material of the stove itself, on which the engine will be attached. The traditional and most affordable option is moisture-resistant plywood brand. FSFIt has a high bending strength and holds fasteners well, but is afraid of prolonged contact with water and requires high-quality painting or pasting with fiberglass. Plywood thickness usually varies from 10 to 18 mm depending on the power of the motor.
A more modern and durable material is fiberglass or sandwich panels based on foamed PVC (for example, Komatex or AirocellThese materials are not afraid of water, ultraviolet light and corrosion, they are lighter than plywood at comparable stiffness, but they cost much more, and fiberglass is more difficult to process at home without special tools.
For power mounting elements, such as brackets or response slats, stainless steel of AISI 304 or 316, as well as duraluminum are often used. The fastening bolts should be made of stainless steel, and nuts should be used with growers or self-contractors, so that the vibration of the motor does not weaken the connection.
⚠️ Attention! Never use conventional chipboard, MDF or FC plywood for transom bearing elements. These materials will quickly gain moisture, swell and lose strength, which can cause the motor to fall into water while driving.
When choosing the thickness of the material should be guided by the engine power. For electric motors up to 30-40 pounds (about 0.5-0.7 hp equivalent), 12 mm plywood is enough. If you plan to install a more powerful unit, the thickness is increased to 18-20 mm or use a double wall with stiffened ribs.
Instructions for the installation of the hinged transcent
Installation of the deck requires accuracy and accuracy of measurements, as errors in calculations can lead to the wrong angle of the trim or even damage to the cylinders. The first step is always to mark the mounting places on the sides or banks. If the transom is attached to the cylinders, you need to use special protective tapes made of PVC, which will prevent the rubbing of the fabric with belts or straps.
The installation process usually starts with the fixation of the side mounts, either with the regular belts of the boat (if the design allows), or with additional slings with carabiners. It is important to ensure symmetry of the mounting: the left and starboard should be loaded the same. After the sidewalls are installed, the slingboard itself is mounted, which rests on the cylinder or hard bottom.
☑️ Pre-installing check
The final step is to adjust the height and angle of inclination. The electric motor must be submerged in water to the depth specified in the instructions (usually 15-20 cm from the screw to the surface), but the lower unit should not rest on the bottom of the boat when rolling.
- 📏 Measure the distance from the transom to the water to find the correct length of the lower unit.
- 🛡️ Install additional linings on cylinders in places of contact with belts.
- 🔧 Check the tightening of all bolts after the first trial trip.
Use rubber pads between the plywood board and the boat cylinder, which will reduce vibration transmitted to the fabric and prevent the formation of scuffs during long-term use.
The technology of sticking a stationary transone
Transnant pasting is an irreversible process that requires a professional approach and the use of special two-component adhesives for PVC (for example, Texacoll, Wigam or RadicalFirst, you have to prepare the surface: degrease the place of sticking on the cylinders and the transom board itself. PVC surface is often cleaned with fine sandpaper for better adhesion, but you need to do this carefully so as not to damage the reinforcing layer.
The adhesive is applied in two stages. The first layer is used as a soil and must dry completely (usually 15-30 minutes, depending on the temperature and type of glue), the second layer is applied to both glued surfaces, then you need to wait for the "stick" time (when the glue stops sticking to the fingers, but still sticky), then the surfaces are connected and carefully rolled with a hard roller, squeezing out all the air bubbles.
To reinforce the design, the "pocket" method is often used, where the transom is glued not just over the cylinder, but between layers of tissue or in a special pocket of PVC tape, which greatly increases the adhesive area and the reliability of the connection, drying such a connection must take place at room temperature for at least 24-48 hours before complete polymerization of the adhesive.
| Parameter | Optimal value | Note |
|---|---|---|
| Sticking temperature | 20–25 °C | At low temperatures, the glue dries longer. |
| Drying time (primary) | 24 hours. | Before the first load |
| Time of complete polymerization | 72 hours | Before the motor-powered waterway |
| Sticking thickness | 0.1-0.3 mm | Excess reduces strength |
The secret of a reliable pasting
For maximum strength, professionals recommend heating the gluing site with a building hair dryer to 50-60 degrees immediately after rolling, which activates the chemical processes in the adhesive and makes the compound monolithic, but requires caution not to overheat the PVC.
Strengthen the design and protect against vibration
Even a well-made area is subject to constant vibrations from the operation of the electric motor, which over time can lead to weakening of bolt joints or microcracks in the transom material. To minimize these effects, you need to use vibration junction. Between the metal mounting elements and the plywood / plastic, you should install rubber shock absorbers or use special anti-vibration washers.
If the transom is hinged and rests on banks, make sure that the banks themselves are sufficiently rigid. Sometimes it makes sense to install additional struts between the sides of the boat (stringers) that will take part of the load from the engine. This is especially true for large inflatable boats, where the distance between the sides is large and the deflection of the transom board can be significant.
⚠️ Attention! Regularly check the condition of the belts and frogs. The fabric has the property of stretching under load, so after a few hours of operation of the engine, it is recommended to re-tighten all the adjustment elements.
Also worth paying attention to the protection of the ends of the plywood transom. Even the painted plywood can eventually begin to layer on the ends due to constant contact with water.
Installation of electricians and placement of batteries
The installation of the platform for an outboard motor is inextricably linked to the issue of placing the power source: the battery for the electric motor is a heavy element (usually 10-20 kg), and its improper location can disrupt the differentiation of the boat. The optimal solution is to place the battery in a special sealed box on the bottom of the boat, as close to the transponder as possible, but with respect to balancing.
To connect the motor, power cables of at least 10 mm2 (for low power) or 16-25 mm2 (for high-power motors) are used. The wires should be protected from rubbing and water ingress. Corrugated tubes or cable channels attached along the side are recommended. All connections should be securely insulated, and it is desirable to install a fuse of the appropriate nominal value at the entrance to the motor.
Proper balancing of the boat with an electric motor is more important than with a gasoline one, since the weight of the battery can significantly change the driving qualities of an inflatable boat.
When wiring through the tray board (if the motor is attached to it), you need to use sealants, this will prevent water from entering the boat through the cable holes. If the transom is removable, the cables are better laid on the sides and use quick-removal connectors (for example, Anderson or reinforced car connectors) for connection to the motor.
Frequently Asked Questions (FAQ)
Can I install an electric motor on a boat without a transom?
Yes, this is possible with special attachments that are attached to cylinders and rest on a hard bottom or cans. However, for powerful motors (more than 1 hp equivalent), this option is not recommended due to the risk of damage to the boat.
What thickness of plywood to choose for transom?
For electric motors up to 30-40 pounds (about 0.5-0.7 hp), PVF moisture-resistant plywood 12 mm thick is enough. For more powerful units or if you plan to occasionally install a gasoline engine, it is better to use 18 mm or composite materials.
Do I need to take off the transom after every fishing trip?
If the transom is hinged, it is advisable to remove it to avoid deformation of belts and cylinder fabric during storage and transportation in a deflated form. The glued transom remains part of the boat, but requires protection from ultraviolet during storage.
How to protect the plywood from water?
Plywood must be carefully coated with several layers of moisture-resistant paint, epoxy resin or glued with fiberglass. Pay special attention to the ends and places of drilling holes under bolts.
Will the inflatable boat withstand the electric motor?
Modern PVC boats, especially those with an inflatable keel and a rigid floorboard, are great at keeping the load from electric motors, and the main thing is to distribute the weight correctly and use a reinforced transom so that the cylinders do not damage.