Inflatable boat owners often think about improving the speed specifications of their equipment, especially when the standard bottom configuration does not allow you to go to plane with the desired load. lease These profiles, which are designed to make a quiet rowing boat a dynamic boat that can achieve decent speed even with a medium-powered motor.
Many beginners mistakenly believe that the redane is just a piece of plastic glued to a cylinder, but in fact it is a complex engineering structure that requires accurate calculation and installation. Wrong choice of shape or installation location can lead to not improvement, but loss of stability and even tipping over at turns. In this article, we will discuss the physics of the process, the types of profiles and nuances that will allow you to get the most from the modernization.
The primary task of any hydrofoil Or the cheekstroke, to create lift when you're moving, by raising the nose of the vessel and reducing the area of contact with water, which reduces drag and allows the engine to operate in a more efficient mode. aerodynamics Inflatable boats are very different from rigid hull, and ignoring this fact is fraught with trouble.
The principle of operation and physics of glossing
To understand the need for installation, you need to understand how an inflatable vessel behaves on the water. In displacement mode, the boat literally pushes the water apart, creating a high resistance wave. motor-power And the shape of the bottom, the boat has to jump out onto the surface of the water, and here comes the redans, which direct the flow of water and air at a certain angle, creating the necessary lift.
The key is to create vortices and proper pressure distribution under the cylinders. Sloppy The elements cut off the water from the sides, prevent it from going up high and creating additional resistance. Without them, the flow simply flows around the round side, tightening the boat deeper. A properly set profile causes the water to shoot off the side, forming an air cushion.
⚠️ Warning: Excessive angle of attack of redane can lead to the effect of "goat", when the bow of the boat sharply lifts up, and the stern loses traction with water, which creates the risk of tipping back.
It's important to note that the efficiency of the operation depends on the flow rate. At low speeds, these elements can even interfere, creating excess resistance, but once you add gas, their role becomes critical. planing It becomes more even, and the boat stops pecking its nose on each wave.
Before placing any items on board, conduct a time-fixed test (such as tape) at different speeds to assess the change in boat behavior without risking damage to the cylinder.
Main types of profiles for inflatable vessels
The water accessories market offers various upgrade options, and it can be difficult to choose the right one. All existing solutions can be divided into several categories depending on the design and location of the attachment, and the choice of the specific type depends on whether your boat is used for fishing, cruising or high-speed ferrying.
The most common option is topping upThese are extra cameras attached along the side, easy to install and do not require glue, but tend to deflate or damage to sharp objects, and a more reliable but difficult solution is rigid profiles made of PVC fabric or composites that stick directly to the cylinder.
There are also combinations where the rigid base is complemented by inflatable elements to mitigate impacts on the water.
- 🚀 Tough profiles: They provide stable geometry and predictable behavior at high speeds, but require a professional adhesive composition.
- 🎈 Inflatable options: They are easily transported in deflated form and do not increase the dimensions of the boat during storage, but are less durable.
- ⚓ Combined systems: try to combine the reliability of rigid design with the shock absorbing properties of inflatable elements.
When choosing a material, you should pay attention to its compatibility with the fabric of your boat. PVC And the profile has to be of comparable strength, or it's going to be a weak link in the design, and cheap thin film analogs can quickly become unusable under ultravieta and mechanical stress.
Impact on speed and controllability
The main question that owners are concerned about is: how much will the speed increase after installation? Practice shows that competent modernization allows you to add from 3 to 7 km / h, which is a significant indicator for low-power engines. manageability and stability of course.
The boat stops snooping from side to side in lateral turbulence, as the profiles work as extra keels to stabilize the hull, which is especially important for anglers who need to hold their position accurately or drift slowly, and fuel consumption is also reduced, as the engine requires less effort to maintain cruising speed.
| Parameter | No reds. | With redans. |
|---|---|---|
| Gleaming time | Long, with a nose blowing. | Fast, sharp breakaway |
| Roll angle at the turn | Big, risk of scooping the board | Moderate, confident passage |
| Fuel consumption | High because of resistance | Decreased by 10-15% |
| Comfort of the crew | Strong shaking, punches | A softer move |
And it's worth noting that at a very quiet run, when the boat is not yet in mode, the extra elements can create a sense of the viscosity of the water, which is normal, because they increase the wet surface area in static. aerodynamics He will do his job by pushing the boat to the crest of the wave.
⚠️ Warning: The installation of redans on one side of the boat is (asymmetrically) strictly prohibited, as this will lead to the permanent side of the boat and make control impossible.
Installation technology: glue and surface preparation
If you've chosen the adhesive option, the quality of the surface preparation will be the decisive factor in the durability of the structure. PVC It requires thorough degreasing and cleaning, a process that is like preparing for a car to be painted: any grain of sand or stain of fat will become a hotbed of detachment.
You'll need a special two-part glue for polyvinyl chloride to work with, and conventional household adhesives like Moment or silicone sealants won't withstand the constant strain and bending that a boat is subjected to on the water, and polyurethane-based compounds have proven their best.
☑️ Preparation for gluing
The application technology usually involves a double coating, first, the glue is applied to both glued surfaces and left until the finger sticks (when the finger does not stick, but the trace remains), then the second layer is applied, and the parts are joined together, and it is important to tightly roll the seam with a roller to expel all the air bubbles.
Temperature also plays a role: most adhesives require a temperature of at least 15°C for quality polymerization. If you work in a cold garage, the result can be unpredictable. Once installed, it is advisable to let the boat stand for at least 24 hours before launching.
What to do if the glue freezes too quickly?
If the glue begins to grasp before time, do not try to dilute it with a solvent - this will violate the chemical formula. It is better to carefully remove the layer with a blade and apply it again, thoroughly cleaning the surface.
Comparison of manufacturers and ready-made solutions
There are many brands on the market that offer ready-made tuning kits, not only in price, but also in the quality of the material used and the geometry of the profile, and cheap Chinese counterparts often sin geometry, which negates the entire effect of their installation.
Well-known boat equipment manufacturers often produce redans that are compatible with their models, which ensures the perfect match of the curvature of the cylinder, and when buying universal kits, you need to be prepared for the fact that the profile will have to be cut or heated with a hairdryer to give the desired shape.
When choosing, pay attention to the following specifications:
- 📏 Profile length: It must be at least 2/3 of the length of the cylinder for effective operation.
- 🧪 Material density: 700-900 g/sq.m. is optimal for the balance between strength and weight.
- 🎨 Color resistance: Quality materials do not fade in the sun and do not change color from contact with water.
Do not chase the lowest price, as reworking a poorly installed design will require more time and money than the initial purchase of a good kit. Certified Products often have a warranty and instructions in Russian, which simplifies the process.
Buying a ready-made kit from the manufacturer of your boat is the safest option to ensure the compatibility of materials and shapes.
Common errors in installation and operation
The most common mistake is breaking symmetry when you stick it, and even a slight skew of a few millimeters can cause the boat to be constantly led away, and you have to constantly paddle or adjust your course with your motor. marking-stick and carefully measure the distance from the keel to the edge of the profile.
The second mistake is saving on glue or using expired materials. Some "masters" try to glue reds to a sealant or mounting foam. On the water, these structures live from one to three trips, then they break off with pieces of cylinder fabric. Repair after this "tuning" is very expensive.
⚠️ Warning: Never set the redans above the waterline in a static position - they should work in the flow, not just hanging in the air, creating sailing.
Also, the need to warm up the seam is often ignored. After gluing, it is recommended to warm up the joint with a building hairdryer (carefully, without overheating) or leave the boat in the sun, which activates the residual properties of the glue and ensures maximum adhesion. Neglecting this stage is a common cause of detachment of the edges.
Maintenance and care of aerodynamic elements
After installation, the redan requires minimal maintenance, but you need to extend the life of the fisherman. After every fishing or walk, it is recommended to wash the salt and dirt with fresh water. Aggressive chemicals are best avoided, a mild soap solution is enough.
Check the seams regularly, and if you notice that the edge is starting to recede, don't expect to see it completely ripped away. It's much easier and faster to glue a small area than to redo the whole work. repair-packThis should always be in your boat bag.
When storing a boat in a deflated state, try not to bend the reds in the same place, it is better to fold the boat so that the profiles are in a straightened state or have a large bend radius, this will prevent cracks in the material and on the glue layer.
Can you make handmade items from materials?
In theory, you can use pieces of dense PVC fabric from an old boat or awning to carve them into a triangle. But it's almost impossible to calculate the angle of attack and aerodynamic profile on your own. Home-made structures often act as anchors, braking the boat rather than accelerating it.
Will the boat’s load capacity increase after installation?
There's no direct increase in load capacity because the volume of water being displaced doesn't change, but by going into plane earlier, you can make better use of the engine power, which subjectively improves the feeling of being loaded.
Do I need to take off the reds for the winter?
No, you don't have to remove them if they're properly glued, the removal will damage the fabric of the boat, just ensure that the boat is properly stowed or poorly blown to avoid the creases.
How do redans affect the permeability of shallow water?
Hard profiles can slightly increase the precipitation (by 1-2 cm), which is critical in very shallow water. Inflatable options are more elastic and when hitting the bottom simply crumple, so for shallow water they are preferable.