Choosing the right anchor device for an inflatable vessel is not just a matter of convenience, but a critical element of safety on the water. PVC They often face the dilemma of using a classic anchor or choosing a specialized one. Traditional structures with sharp horns are perfectly kept on a rocky bottom, but they pose a huge risk to cylinders, which can result in an emergency situation away from the shore.
That's why. anchor It's becoming the de facto standard for small craft, designed to avoid getting stuck in the snags and, most importantly, to ensure that the snags don't get damaged when they're pulled out, and it's based on a center of gravity shift, which allows the device to flip over and get out of any underwater obstacle.
In this article, we will analyze in detail all the nuances of choice, weigh the advantages and disadvantages of various materials, and also provide a step-by-step algorithm for creating a reliable anchor yourself. double-bar This can be the perfect solution for your boat, and how to calculate the weight of the cargo required for specific conditions.
Design features of anchors-unlocked
The main difference between a non-couple and a classic anchor (for example, Admiralty) is the absence of sharp horns pointing upwards. The design is usually a load with an eyelet for mounting the falter, where the mounting point is shifted relative to the center of mass. When the falter is stretched, the anchor turns nose down, and when a strong jerk or change in the angle of thrust, it simply flips over, passing through the thickets of grass or drifts.
There are several basic types of these devices. cat anchor They have legs that are folded inwards, and when they're pulled out, they fold into a streamlined cylinder. lead-pancake and effluent It's important to understand that the retention force here is not by burying sharp elements in the ground, but by weight and friction on the bottom.
Materials are key. Lead is ideal because it's heavy, it doesn't rust and it's easy to work. Steel structures require high-quality corrosion treatment, otherwise rust can stain the boat floor. Concrete options are cheap, but they're too voluminous and fragile when hit on board.
⚠️ Attention: It is strictly forbidden to use as a non-locking stones, netted, or bricks, they have sharp edges that will inevitably wipe the floor of the boat when rolling, and can also split, leaving you without anchor.
Advantages and disadvantages of using
The main advantage of the uncoupled is, of course, cylinder-safetyYou don't have to go overboard to release a stuck anchor, risking flipping over or cutting cloth against underwater boughs, and this is especially true for fishing in snags or in grassy shallow waters, where the classic anchor becomes useless cargo.
They also have compact anchors, which can be foldable or flat, so you can store them in a hazelnut or under a seat without taking up any useful space, and the absence of protruding sharp parts minimizes the risk of accidental injury when you move inside a boat during a storm or active fishing.
But there are drawbacks to the design, and the main one is that it has less of a holding force on hard ground than anchors with legs, and in strong currents or winds, you might need a heavier load than a similar boat with an Admiralty anchor, and in a sluggish bottom where the anchor is supposed to burrow, a flat sole can just slide across the surface.
- 🛡️ Integrity assurance: Complete absence of risk of puncture of PVC when lifting the anchor.
- 📦 Compactness: Convenience of transportation and storage in limited space.
- 🌿 Universality: Possibility of use in heavily overgrown water bodies and snags.
- ⚖️ Weight: It requires more mass for reliable retention on the flow compared to paw models.
Unlocking is a compromise: you sacrifice some of the retaining power for the absolute safety of the boat and ease of operation.
Calculation of the required weight of the anchor
The right weight is the key to a successful parking lot. There is a common misconception that any heavy object is enough for an inflatable boat. In fact, the weight must correspond to the area of the boat's sailing and the strength of the expected current. For calm water, the rule is: 1 kg of anchor weight per 1 meter of hull length.
If you plan to fish on a moderate river, the mass needs to be increased by 1.5-2 times. The wind also makes its own adjustments: the high superstructure of the boat works like a sail, creating an additional load on the anchor rope. Using an too light anchor will lead to the fact that the boat will constantly demolish, scaring the fish and creating discomfort.
For an accurate calculation, you can use a simplified table of weight depending on operating conditions. Remember, these are the minimum values, and it is always better to take a margin of 10-15%, especially if the bottom is sandy or covered with algae.
| Type of water body / Conditions | Boat length up to 3.0 m | Boat length 3.0-3.8 m | The length of the boat is 3.8-4.5 m |
|---|---|---|---|
| Lake, calm (standing water) | 2.5 - 3 kg | 3 - 4 kg | 4 - 5 kg |
| River, weak current | 3.5 - 4 kg | 4 - 5 kg | 5 - 6 kg |
| River, middle current / Wind | 4.5 - 5 kg | 5 - 6 kg | 6 - 8 kg |
| Strong Current / Open Water Area | 6+kg | 7+ kg | 8+ kg |
To increase the holding power without increasing the weight of the anchor itself, use a longer anchor cable (chain at the bottom). The optimal ratio of the cable length to depth is 1:4 or 1:5.
Materials for self-manufacturing
If you're going to anchor yourself, the material is the first step, and lead is the king of this niche, it's very dense (11.3 g/cm3), so it can be compact and heavy, and it's soft, it doesn't sparkle or it doesn't rust, and you can find it in old batteries, in non-ferrous metal reception points, or in the residue from roof repairs.
Steel and cast iron are used less frequently because of corrosion, but they are considerably cheaper. If you choose metal, be sure to consider pouring concrete or using a thick layer of epoxy to protect against water. Concrete is a budget option, but its main enemy is fragility. When hit by a stone, the concrete anchor can split, leaving you without an anchor device.
Old buckets, pots or specially welded sheet metal containers are great for casting molds. Rebars or steel pipes are often used to create a supporting structure inside concrete or lead. It is important that the rim bolt or the eyepiece be securely monolithic in the body of the cargo.
⚠️ Attention: When smelting lead at home, be sure to use a respirator and only work outdoors or under a powerful hood. Lead vapors are toxic and accumulate in the body!
Step by step: we make anchor ourselves
The process of creating a lead-free zip is simple enough to require no complicated equipment, and the most popular option is a pancake cast or a truncated pyramid, and first you have to prepare a shape, so you can use a canister cut in half or you can make a formwork out of boards with plastic.
In the center of the mold, you put a bolt or a rebar loop, and to securely attach them to the lead, you better splinter the bottom of the metal or weld a cross from the rebar to it, which prevents the attachment from being pulled out under load, and then the metal melts in an iron container (for example, in an old pot that you don't mind throwing away) on a fire or gas burner.
The molten lead is neatly poured into the mold. After cooling (about 30-40 minutes for 5 kg), the finished product is removed. If a plastic mold was used, it can be simply cut with a knife. To improve traction, the bottom of the anchor can be roughened or a piece of sandpaper glued to the epoxy.
☑️ Checklist for anchor manufacturing
The Secret to Perfect Shape
Make the anchor not just a flat pancake, but a trapezoidal shape in the cut (constricting to the bottom), a shape that resists demolition better by current and is more likely to flip on hook than a flat cylinder.
Proper equipment and anchoring technique
Even the best anchor will not work without the right phalt. PVC boats are strongly discouraged from using chains, as they are heavy and can damage cylinders. The best option is a 6-8 mm diameter polypropylene cord. It does not rot, does not sink in water and is pleasant to the touch.
The anchor should not be attached to the bow of the boat directly, but through a vertebral rope so that the cable does not twist. The length of the cable should be 3-5 times greater than the depth at the parking lot. This provides a horizontal force on the anchor, causing it to "buried" or lean more tightly to the bottom, rather than hanging vertically.
When you lower the anchor on the water, it is important to let it touch the bottom before you put all the supply of the cable. A sharp throw of heavy load can damage the bottom of the boat or confuse the cable in the propeller of the engine.
- 🪢 Knot: Use a reliable "bulin" or "bayonet" knot to attach the faal to the armature.
- 🚫 Prohibition: Never tie a foul directly to the inflatable part of the boat without reinforcement.
- 🔄 PERSON: A mandatory element to prevent the rope from being twisted into a harness.
Frequently Asked Questions (FAQ)
Can I use a strong-flow anchor?
Yes, you can, but the weight of the anchor should be much larger (up to 10-12 kg for a boat 3.5 m). On a strong current, a flat sole may not provide sufficient grip, so it is recommended to use the anchor in conjunction with additional cargo or choose places with natural shelters.
How to replace the bolt when making yourself?
Instead of a bolt, you can use a thick rebar that is bent in the shape of a loop, or even a piece of chain whose ends are reliably scattered inside the lead casting, the main thing is that the metal is protected from corrosion and has a sufficient margin of safety.
Why does the anchor slide down the bottom, even though it is heavy?
The angle of attack of the cable is probably too large (the cable goes too vertically upwards), increase the length of the anchor cable so that it lies on the bottom, and the reason may be a smooth bottom (silt, clay) - in this case, it will help to tie to the anchor a small bag of sand for the initial "anchoring".
Do I need to paint a homemade lead anchor?
Lead itself is oxidized and covered with a protective film, so you don't have to paint it, but painting it (like rubber paint) will protect your boat from lead traces and make the anchor more visible at the bottom if you drop it.