Choice lyctross It's not just buying a rope, it's an investment in the safety of your boat, and it's this element that connects the inflatable tubes to the rigid floorboard deck, making the whole PVC boat rigid. An improperly matched or worn phalt can cause the hull to deform, unevenly distribute the load, and, as a result, loss of the boat's performance. In an emergency, when it's a storm, it's the reliability of that connection that determines whether you get to shore safely.
Many boat owners are faced with the need to replace the regular cord after the first season of active operation, and factory variants often sin by using materials that quickly lose elasticity under the influence of ultraviolet light and salt water. Polypropylene You can start to crumble, and nylons can stretch too much, which is not acceptable for a rigid bundle of cylinders and bottoms, and understanding the physics of the process and the properties of materials will allow you to avoid errors in modernization.
In this article, we will discuss in detail all aspects associated with lyctross: from the choice of diameter and material to the nuances of DIY installation. static More important than the fractious effort, how to tie a knot that doesn't unwind under vibration, and what tools are really needed to make a good fit, a competent approach to this issue will extend the life of your boat for years.
What is lyctross and why is it needed in the design of a boat
Lyctross The main function of the cable is to create a rigid connection between the inflatable elements and the rigid decking (floorboards), without which the boat would be simply a set of inflatable chambers that, under the pressure of water and the weight of passengers, could move uncontrollably relative to each other.
The system is tension-based, and when the cord is inserted into the grooves and pulled, it assembles the structure into a single monolith, which allows the boat to keep its shape, to effectively dissect the wave and maintain its course stability. lyctros weakened, the bottom begins to "walk", which creates additional resistance to water and increases the risk of damage to the PVC material on the edge of the floorboard.
⚠️ Attention: Operating a boat with weakened or damaged lyctros is strictly prohibited, which results in an uneven distribution of pressure on the cylinders, which can cause tissue to rupture at the attachment sites or deformation of bulkheads.
Modern boat designs use different mounting systems, and in budget models it can be simple lacing, in more advanced models it can be a system. LikFas Or analogues that use special locks and adjustment mechanisms, and understanding your system type is critical when selecting replacement parts.
Historical background
Where did the term come from?
The term "litros" comes from the Dutch word "lijk" meaning "edge" or "crumb", and "tros" means cable, originally the term was used to sew a rope into the edge of a sail to strengthen it, and in shipbuilding this technology has migrated to inflatable structures, where the role of the sail is played by cylinders, the role of the mast and the rankout is a hard bottom.
Materials of manufacture: comparison and selection of the optimal option
The choice of material for lyctross is a balance between strength, elasticity and resistance to external influences. The market offers several basic options, each with its own advantages and disadvantages. The wrong choice of material can negate all efforts to assemble a quality boat.
The most common material is polyesterIt has a high tensile strength and a minimum tensile coefficient (less than 3% under load), which is ideal for fixing the bottom. Polyester does not absorb water, is resistant to ultraviolet light and chemically inert. However, it can be rigid to the touch and requires careful handling when knots are knitted.
The second popular option is nylon (polyamide)Its main advantage is its high elasticity and ability to cushion jerk loads, but this property makes it less suitable for a lyctross system where rigid fixation is required. Nylon can stretch up to 15-20%, which will lead to sagging of the bottom after several hours on the water. In addition, wet nylon loses up to 15% of its strength.
- 🧵 Polyester (Dacron): Perfect for statics, not stretching, durable, but expensive.
- 🌊 Nylon: Cheap and durable, but it stretches and absorbs water, losing its properties.
- 🌀 Polypropylene: Light and does not sink, but quickly collapses from ultraviolet light and has a low melting point.
- 🛡️ Kevlar threads: Extreme strength, but high price and sensitivity to abrasion on fractures.
When choosing, you should also pay attention to the design of the cable itself. Whipped The variant (boiltail) is preferable to twisted, since it has no tendency to twist and unwind. The shell must be tight but smooth to easily slide inside the lipase when stretched.
For PVC boats, the best choice is a wicker polyester cord with minimal stretching, as it provides the necessary rigidity of the structure and does not lose properties in water.
Diameter and length: how to calculate parameters for your boat
The geometry of lyctross directly affects the reliability of the connection. A too thin cord can simply cut the licpase tissue under load, and a too thick cord can not climb into the channel or damage the seams during installation. The standard diameter for most PVC boats varies from 3 to 5 mm.
The length of the cord depends on the size of the boat and the type of mounting system. LikFas You need a margin to form loops and knots, and to pass through all the rings, and a mistake in the calculation of length can lead to the fact that you can not evenly stretch the bottom, or you will have sticking out ends that will interfere with swimming.
Below is a table of indicative values for the selection of lyctross depending on the class of the boat. Remember that the data may vary depending on the specific model of the manufacturer.
| class | Recommended diameter (mm) | Approximate length (m) | Type of load |
|---|---|---|---|
| Single (up to 2.5 m) | 3.0 - 3.5 | 8 - 10 | Low. |
| Double (2.8 - 3.2 m) | 3.5 - 4.0 | 12 - 15 | Medium |
| Triple (3.5 - 4.0 m) | 4.0 - 4.5 | 18 - 22 | High. |
| Full-size (4.2+ m) | 4.5 - 5.0 | 25 - 30 | Extremely extreme. |
When buying a material, always take a margin of 10-15%, which will allow you to safely make several attempts at proper stacking, design high-quality ogons (loops) and leave the technological tails for possible ligation in the future.
Step by step: replacement and installation of lyctross yourself
The process of replacing the lyctross requires care and precision. You don't need to have the skills of a sea knot, but a basic understanding of how tension works is essential. Before starting work, make sure the boat is fully deflated and cleared of sand and dirt that could damage a new cord or get stuck in the canals.
First, you need to carefully remove the old flap, if it's just inserted into the groove, there's no problem. If you use a system with locks or slushing, be careful not to damage the fabric. After dismantling, check the lipazas for scuffs, sand or glue residues. If necessary, blow them with compressed air.
☑️ Preparation for lyctross installation
Weaving a new cord is best done from the bow of the boat, moving towards the transom. To facilitate the process, you can use a thin wire or a special tool, a hairpin, attaching it to the end of the cord. The movements should be smooth, without jerks, so as not to pierce the fabric from the inside. It is important to make sure that the cord does not twist inside the channel.
Pay special attention to stretching. You need to pull evenly, going from side to side, like tightening shoelaces. First, slightly pull one side, then the other, gradually increasing the force. The final tension is done after you have all the floorboards.
⚠️ Attention: Never use pliers or other metal tools to directly grip the cord inside the tissue canal, guaranteed to damage the fibers and reduce the life of the boat.
Nodes and methods of fastening: reliability of connection
A knot is the weakest point in any rope system, and a properly knotted knot retains 80 to 90 percent of the strength of the cord, whereas an incorrect one can halve it, and a lyctross system uses knots that do not crawl under constant vibration and are easily untied when needed.
The most common option is baleen (a squatting device for the formation of a loop and) double-slag If you use an adjustable system, you often use it. gripper The main rule is that the knot should be tightly tightened and, if necessary, fixed by the control knot.
The ends of the cord, after tying the knots, need to be melted with a lighter to prevent flaring, and this needs to be done carefully, forming a neat ball that will not scratch the fabric or interfere with the passage through the holes. Some craftsmen use shrinkage for additional fixation and aesthetics.
- 🪢 Boulin: Creates a non-tightening loop, ideal for covering elements.
- 🔗 Straight knot: Used only to bind two ends of the same thickness (not recommended for basic loads).
- 🛑 Lock-in knot: Prevents the end of the cord from slipping through the hole.
- 🔒 Constrictor node: For temporary fixation, very tight, but difficult to untie.
It's important to check the knots before each run, and the vibration of the engine and the pitching can gradually weaken even a well-tightened knot, and if you notice that the knot crawls, immediately pull up.
Common errors in installation and operation
Even experienced boat owners sometimes make mistakes that can cost comfort or safety on the water. tensionWhen one side is pulled stronger than the other, the boat gets