Operating an inflatable vessel requires not only a high-quality engine and a reliable anchor, but also the right solution to the question of its transportation. Transportation on the roof of the car is often uncomfortable because of the dimensions, and towing in assembled form on a standard trailer without modifications is fraught with serious damage. PVC-boat-layerThis becomes a key element of safety of your boat while driving on the track.
Many owners underestimate the importance of proper support, believing that it is enough to simply put cylinders on plywood or metal. However, vibration, oncoming airflow and inertia during braking create enormous loads on the contact points. PVC It is quickly rubbed and the seams can lose leakage, which will lead to expensive repairs or a complete replacement of the vessel.
In this article, we will discuss in detail how to design and assemble the perfect bed that will ensure the safety of the boat and comfort when towing. You will learn about the types of materials, the nuances of geometry and the typical mistakes that beginners make when refitting trailers.
Why you need a specialized lodging and how it is better than a flat bottom
The main function of the lodging is to distribute the weight of the inflated vessel over as much area as possible. If the boat lies simply on the flat bottom of the trailer, all its weight is concentrated on narrow contact bands, creating extreme pressure points. Keelboat It is particularly vulnerable in this regard, since its geometry involves relying on the keel and side cylinders, rather than on a flat bottom.
Use watman or dense paper to create a keel shape of your boat before buying materials for the padding – this will save money on mistakes.
The specialised padlock repeats the contours of the hull, which prevents transom sagging or inflections in the middle, which is critical to maintaining driving performance: the deformed hull is worse at plane and less manageable, and the properly formed sides protect the boat from lateral displacement when the trailer turns abruptly.
⚠️ Note: The use of metal corners or pipes without soft coating is strictly prohibited. PVC under load leads to irreversible damage to the structure of the material.
Aerodynamics is also worth considering: a boat mounted on a properly designed lozenge has less sailing drag and scours side to side at high speeds, which reduces the load on the vehicle's coupling and improves overall safety.
Selection of materials: wood, metal or composite
The first step to building a reliable support is to choose the base material, and the traditional solution is moisture-resistant plywood, soaked in special compounds, cheap, easy to work, and strong enough for light and medium boats, but there is a significant disadvantage to the tree: it can over time dissect or rot if the waterproofing is broken.
A more durable option is a steel profile, covered with powder paint or galvanized. Metal frame provides a rigid geometry that you can not get with wood. But here the question of weight arises: excessive mass of the trailer may require recalculation of the permissible load on the axle and coupling device.
The modern alternative is composite materials and special polymers, which are not afraid of water, ultraviolet light and corrosion. IHD pipes or fiberglass profiles that combine lightness and high mechanical strength.
Regardless of the frame chosen, the top contact layer should be made of a soft but wear-resistant material. Ideal is a high-pile carpet or special rubber mats. Some craftsmen use foamed polyethylene, but it is less durable when in constant contact with water and dirt.
Geometry design: accounting for the keel and cylinders
The geometry of the padlock should be very specific to the type of boat you're going to have, and for flat-bottomed models (PBD), the requirements are minimal: you need a flat plane with small sides. keelboatsThe wrong angle will cause the boat to rest only with its nose and transom, sagging in the middle.
Designing the beams must be high enough to keep the cylinders from slipping, but not high enough to interfere with rapid loading and unloading. The optimal height is about one-third of the balloon diameter inflated condition.
Formula for calculating the height of the side
For a boat with a cylinder diameter of 40 cm, the optimal height of the bedside is 12-15 cm This provides reliable fixation without the risk of damaging the top of the cylinder in the wind.
It is important to provide cutouts for transom wheels and drain holes. If the pawn covers the discharge valves, after each trip, water will stagnate inside the boat, which will lead to mold and weight gain, and it is worth leaving technological gaps for sagging cylinders when air temperature changes.
To calculate the width accurately, use the formula: the width of the boat plus 10-15 cm on each side, which will ensure comfortable accommodation without excessive backlash.
| class | Length (cm) | Spread of the foam (cm) | Height of board (cm) | Recommended material |
|---|---|---|---|---|
| Compact (2 seats) | 240-280 | 130-140 | 10-12 | Plywood + carpet |
| Average (3 seats) | 300-340 | 150-160 | 12-15 | Metal + rubber |
| Large (4+ seats) | 360-420 | 170-190 | 15-18 | Profile tube |
| Special (RIB) | 350-500 | Individually | 20+ | Composite/Aluminum |
Step by step: Assembly of wooden loom
Consider the process of creating a universal pad of moisture-resistant plywood with a thickness of 18-20 mm, which is the most affordable option for self-implementation and does not require a welding machine. First, you need to prepare a frame that will be attached to the frame of the trailer.
- 🛠️ Marking and opening: Move the dimensions of the trailer bottom onto a plywood sheet. Cut out the two longitudinal beams and the transom ribs. Remember to cut out the trailer frame elements.
- 🔩 Frame assembly: Connect the frame elements with galvanized corners and screws, and you can use moisture-resistant carpentry glue to reinforce the structure.
- 🧵 Sheathing and soft layer: On top of the frame, lay a sheet of plywood, drilling holes for water drain in it. On top, tightly stretch and staple a carpet or a special transporter tape.
- 🛡️ Finishing: All ends and exposed wooden surfaces are covered with a large amount of yacht lacquer or epoxy, which will protect the tree from rotting in contact with water.
The mounting of the finished pad to the trailer is better done through rubber pads. This extinguishes the vibrations that are transmitted from the trailer wheels. Use bolt connections with the growers so that the fastener does not weaken from shaking.
☑️ Control of lodging assembly
Once assembled, allow the structure to dry for a day before the boat is installed, which ensures that the lacquer coating is polymerized and does not stick to the bottom of the vessel.
Metal frame: welding and anticorrosion protection
If you plan to operate actively and launch frequently, a metal lodging is a more reliable choice, using a square or rectangular sectional tube, and the size of the pipe is based on the boat's carrying capacity: a 20x20 or 25x25 mm profile is sufficient for medium models.
The process starts with building a slipway or using a flat ground, and the pipes are cut into size and welded into a single frame, and the key is to create a keel support, so you can arch the central pipe or weld crossbars at an angle to form a V-shaped profile. Welded seams You need to clean with a Bulgarian so that they do not damage the soft skin.
The main rule of metal padding: no sharp edge or weld should not contact the boat even through the skin layer - use a double layer of soft material in places of risk.
Anti-corrosion protection is mandatory, even galvanized pipe in the welding area loses its properties.
- Disgrace the surface with solvent.
- Applying a primer on metal (preferably epoxy).
- Covering with finishing enamel in 2-3 layers.
For metal plating, rubber-based car carpet or special mats made of EVA foam are ideal. The fabric is best fastened to metal using through bolts with wide hats or using a water-resistant contact glue.
Errors in installation and operation
Even a well-made padding can fail to meet expectations if it is wrong to install it. The most common problem is the wrong center of gravity. If the boat is set too far back, the trailer wags, which is dangerous on the track. If it is too far ahead, the rear axle of the car becomes overloaded.
⚠️ Warning: Before the first trip, be sure to check the trailer's balance with the boat mounted. The trailer's breathing in the laden state should put pressure on the farcope ball, but not lift the rear of the car.
Another mistake is that there is no drainage, and the water that falls between the bottom of the boat and the bed should not stagnate. If you use closed boxes or deep boards, make sure to drill holes at the bottom, otherwise in winter, this water will freeze and damage the structure, and in summer it will become a breeding ground for bacteria.
Also worth mentioning is the fixation. Lodges should not be the only means of holding the boat. Be sure to use additional slings through the hull and transom stops. At speed, the oncoming airflow creates a lift that can tear a poorly secured boat even from a perfect pad.
The secret to fast loading
Install removable roller guides on the front of the lodge, which will help you easily roll a heavy boat onto a trailer without any assistants, and before you go, you can dismantle them or fold them.
Frequently Asked Questions (FAQ)
Can you use a conventional trailer for cars without modifications?
Theoretically, you can if the boat is small and flat-bottomed, but for keel boats, PVC is dangerous: the sharp edges of the trailer side will wipe the cylinders in one trip, minimum modification in the form of wooden bars and carpet is mandatory.
How often should I change the soft coating of the pad?
Depending on the intensity of operation, carpet serves an average of 2-3 seasons of active fishing. If you notice that the pile has swelled into porridge or hard lumps of dirt have appeared, the coating should be replaced so that it does not work as an abrasive.
Do I need to remove the motor when transporting on a pad?
For light motors (up to 10 kg) and short distances on good roads - not necessarily if there is a transom stop. For heavy motors and long trips, it is better to remove the engine, so as not to overload the transom of the boat and not create excess vibration.
What is the best way to attach a carpet to wood or metal?
The best way to use a stainless steel stapler for wood is to use a stainless steel stapler, additionally smearing the joints with water-resistant glue. The metal is a combination of glue and mechanical pressing (bolts or profile slats), since the stapler will not work here.