Transporting an inflatable vessel is always a risk of damaging expensive property if you don't secure it. The main stress point on the highway is the bow, which takes on the oncoming airflow and inertial loads. bow-rest It is a critical safety feature that cannot be ignored when building a trailer.
Many owners make the mistake of relying only on straps and slings, but without a hard bow, the soft side will constantly rub against metal or frame wood. Vibration at high speeds can turn a quality adhesive seam into rags within a few kilometers of the journey. Properly installed support distributes weight and fixes the geometry of the cylinders, preventing them from moving.
In this article, we will discuss in detail what materials are best to use, how to calculate the angle of inclination and why standard solutions may not be suitable for your particular case. You will learn how to turn a simple trailer into a reliable transport for your boat, avoiding common mistakes of beginners.
Why you need a hard nose accent during transportation
The main function of the stop is to transfer inertial forces from the boat to the frame of the trailer. When the car is braking sharply, the multi-ton mass of water and air inside the cylinders tends to continue moving forward. nose-loop or the keelson do not have a rigid support, the entire load falls on the fasteners belts, which can stretch or burst.
And the thrust protects the transom board and the nose end from deformation, and without a central thrust point, the hull can bend under its own weight and wind load, which is especially true for models with a high-speed, high-speed, high-speed, low-speed, low-speed, low-speed surface. float-bottom (NDND), where the rigidity of the design is lower than that of the soldered variants.
⚠️ Attention: The lack of a nose stop often leads to the fact that when braking the boat slides forward, the nose balloon is crushed and the transom is damaged, which can cause loss of buoyancy on the water.
Also worth considering is aerodynamics: When driving at speeds above 60 km/h, the airflow tries to lift the bow of the boat. The hard stop counters this lifting moment, ensuring the stability of the entire load, which reduces the fuel consumption of the car and reduces wear of the rubber elements of the trailer suspension.
Design features and types of stops
There are several basic design types that are used to fix the nose of inflatable boats, and the choice of the particular option depends on the geometry of your trailer and the type of bottom of the vessel. quill-point, repeating the keel curve.
The second popular option is a vertical rack with a wide support platform, which is often used for flat-bottomed boats or when you want to minimize contact with cylinders, and the fabrication material also varies from moisture-resistant plywood to stainless steel or aluminum.
- 📐 Kilt pads - provide the maximum contact area and perfectly repeat the contours, but more difficult to manufacture.
- 🛑 Vertical struts Easy to install, take up little space, but require precise height adjustment.
- 🧱 Combined systems combine elements of passement and onboard limiters for maximum fixation.
It's important to note that for boats with a hard floorboard bottom, the emphasis should be strictly central, and even a few centimeters of axis displacement can cause the whole hull to skew when the straps are stretched. NDMA The use of wider support areas is allowed.
Selection of materials: wood, metal or plastic
When you make a stand yourself, you have to choose the material, and each one has its own advantages and disadvantages to consider, and wood, for example, is a classic choice because of its accessibility and ease of processing.
But wood requires high-quality protection from moisture. Even moisture-resistant plywood can eventually dissect if water hits the ends. Metal structures are longer-lasting, but they are heavier and can scratch cylinders if the edges are not handled properly.
| Materials | Weight. | Durability | Difficulty of manufacture |
|---|---|---|---|
| FSF phanera | Medium. | 3-5 years | Low. |
| aluminum | Low. | 10+ years | High. |
| Stainless steel | Highly | 15+ years | Medium |
| Plastic (PHD) | Low. | 7-10 years | Medium |
The optimal solution is often a combination of materials, for example, a metal frame provides strength, and the contact surface is made of wood or special plastic to avoid damage. PVCPlastic stops are good because they don't rot or rust, but they can be less rigid.
Use rubber belt from conveyor belt or car splasher to cladding a wooden stop – this will prolong the life of the tree and protect the boat from scratches.
Step-by-step instructions for the manufacture of a stop
The process of creating a reliable stop starts with precise measurements, and you have to determine the height of the keel above the trailer in the laden state and the width of the support surface, and then you can start to unravel the material.
If you're using wood, cut a keel-shaped base, and you can make a pattern of cardboard right on a boat on the ground, and then you transfer the pattern onto a plywood at least 18 to 20 mm thick, and the metal corners or profiles are welded or screwed to the trailer frame.
☑️ Checklist for the manufacture of a stop
The mounting of the mount to the frame should be removable or adjustable, this will allow you to remove it for maintenance or replacement if necessary. Use bolt joints with grover washers so that the vibration does not weaken the mount. All metal elements be sure to treat with anti-corrosion composition.
⚠️ Note: When drilling holes in the trailer frame, be sure to use cobalt-coated metal drills and lubricate the drilling site with oil so as not to overheat the tool.
The final step is to install a soft pad, which can be made of carpet, rubber or a special type of villous material, and the main thing is that the surface is smooth and has no sticking threads or burrs that can damage it. cylinders.
Installation and adjustment of the boat
Once the stop is installed, the boat should be positioned correctly on the trailer, the nose should be snugly adjacent to the stop with the entire contact plane, and if the touch point is too narrow, the pressure per square centimeter will increase, which is dangerous with long transportation.
Adjustment is done by moving the stop along the drawbar or changing its height, the boat should lie symmetrically relative to the longitudinal axis of the trailer, and this can be checked by measuring the distance from the side to the edge of the trailer on both sides.
Properly adjusted stop takes up to 40% of the load during braking, significantly unloading the nose loop and mounting belts.
To fix the position, a nose belt with a ratchet mechanism is often used, it is passed through the nose handle or a special ring and is attached to the front of the trailer, the tension should be such that the boat does not dangle, but also does not deform.
Protecting the boat from damage while driving
Even with a stop, you need to take precautions: sharp edges of metal elements, bolts, nuts are all potential enemies of your boat, check that there are no protruding parts in the contact zone with cylinders.
When driving on bad roads, it is recommended to slow down, sharp bumps of the trailer wheels about unevenness are transmitted to the boat hull, if the thrust is rigid and the boat is lowered, it is possible to break the cylinder against the edge of the throttle with strong inertia.
- 🛡️ Regularly check the condition of soft upholstery for wear.
- 🔧 Pull up the mounting bolts before each season.
- 🧼 Clean the emphasis from sand and dirt that work like an abrasive.
Remember, sun and water are doing their job. Materials are getting old, rubber linings are tanning and cracking. It's cheaper to replace worn-out elements in a timely manner than it is to repair or buy a new one. PVC.
The Secret of Durability
Cover the wooden stop with several layers of yacht varnish or epoxy resin with the addition of graphite powder - this will create a slippery and absolutely waterproof coating.
Frequently Asked Questions (FAQ)
Can I use a regular bar instead of a special accent?
You can only use a regular timber as a temporary solution, a tree that is not treated quickly absorbs moisture, swells and starts to rot, and the corners of the timber can damage the cylinders, and you can make a profile structure that repeats the keel contours.
At what distance from the transom should the nose stand?
The emphasis should be placed strictly in the nose, as close as possible to the forehead, the distance to the transom does not matter here, the main thing is that the emphasis takes the load from the nose, shifting the stop to the middle of the boat is unacceptable, because this will create a lever that breaks the transom when braking.
Should we focus on winter storage?
If the stop is removable, it's best to remove it, clean it of dirt and salt, and remove it in a dry place, which will prolong the life of the fastener and the material itself, and the non-removable structures need to be preserved by lubricating the metal parts with protective lubrication.
How often should you change the rubber lining on the stop?
The rubber pad should be inspected before each trip, if it has deep cracks, has become rigid or has lost its elasticity, it must be replaced, and on average, during active use, a replacement is required every 2-3 seasons.