The question is, Why do you need crinolinolins? In fact, in the context of shipbuilding and small-size boats, crinoline is a specialized structural element, most often an inflatable or rigid edging, mounted around the perimeter of the board.
The main purpose of this element is to increase the safety and comfort of the crew when driving on the wave. Inflatable crinoline They create an extra volume that extinguishes the impacts of the water, preventing the spray from flooding the cockpit, which is critical to keeping the vessel stable and the passengers dry. Without such protection, even moderate chop can turn a walk into a survival test when the boat begins to draw water overboard.
Modern materials allow you to create effective protective systems that do not weigh the boat, but significantly change its driving performance. In this article, we will discuss in detail the functionality, types of designs and features of operation of these devices, so that you can make an informed decision about the need to install them on your boat.
Functional purpose and working principle
The main task that is being solved crinoline (often referred to as splash-blowers or inflatable tubes in the professional environment), it's about changing the hydrodynamic profile of the side-water interaction. When the boat moves, especially in plane, the bow cuts the wave, creating a powerful fan of splashes on the sides. If the sideboard is low or straight, this water inevitably enters.
Perimeter-mounted balloon It works as a physical barrier and a guide plane, and it throws the water flow outwards and downwards, creating a kind of dry corridor for the crew, and it's not just a matter of comfort with wet clothes, it's a matter of safety, because the water in the cockpit shifts the center of gravity and can lead to a rollover.
In addition to spray protection, crinoline acts as a buffer for mooring and contact with other objects, and the soft but resilient structure takes on the impact energy, protecting the main hull from scratches and dents. aluminum-boat and paint-coated boats which are easily damaged on a concrete berth or on the side of another vessel.
⚠️ Warning: Installing inflatables should only be made on specially prepared surfaces of the shell. Glue of crinoline on dirty or defatted inappropriate composition of the side will lead to detachment at the first serious load.
It is important to understand that the efficiency of the device depends on the quality of the installation and the shape of the balloon itself. Incorrectly selected profile can, on the contrary, create sailing or unpredictable water vortices, so the choice of model should be conscious.
The main types of crinoline designs
The water accessories market offers several variations on the safety boards, and the type of safety you choose depends on your boat's design, budget and operating conditions. inflatable, which are attached directly to the sides by means of glue or mechanical fixers.
The second option is rigid or semi-rigid structures, often integrated into the hull design during the manufacturing phase, which are usually made of foam or plastic and are clad with a strong cloth. They do not require paging, but they are more difficult to install on an already finished boat without major alterations.
There are also combination solutions where the inflatable part is combined with a rigid frame to maintain the shape. Each type has its own advantages and limitations that must be considered before buying.
- 🌊 PVC inflatable tubes: The most popular option, providing excellent depreciation and ease of installation, but requiring pressure control.
- 🛡️ Rigid sprays: Made of fiberglass or plastic, they are durable, but can be heavier and more difficult to install on existing boats.
- 🔗 Mechanical fastening systems: Combine the inflatable camera with straps or brackets for additional fixation, which increases reliability at high speeds.
When choosing, you should pay attention to the compatibility of the crinoline material with the housing material. aluminum-magnesium alloy boats Specialized adhesives are often recommended to ensure the chemical bonding of heterogeneous materials.
Impact on driving performance and stability
Many boat owners fear that the installation of additional elements on the sides will negatively affect speed and maneuverability. Indeed, any protruding element increases the moistened surface area and drag. crinoline They are designed with aerodynamics and hydrodynamics in mind.
With the right shape and size, inflatable boards can even improve driving performance, and they add perimeter buoyancy, which has a positive effect on the body. stability The boat becomes more rolled, but less prone to sharp rolls when moving passengers.
At high speeds, properly installed crinoline helps the boat to plane more easily, creating additional lift in the bow, which reduces the load on the transom and engine, allowing you to save fuel.
| Parameter | No crinoline. | With crinoline installed | Change of change |
|---|---|---|---|
| Splash protection | Low/Not present | High. | Improvement |
| Parking stability | Standard. | Elevated | Improvement |
| Maximum speed | Basic | 3-5% decrease | Minor deterioration |
| Comfort of the crew | Depends on the wave. | Tall (dry) | Improvement |
⚠️ Warning: Excessive inflatables can lead to excessive sailing, making the boat uncontrollable in lateral winds.
Thus, a small compromise in top speed pays off completely with increased safety and comfort, making the voyage enjoyable even with the busy traffic of other boats creating the wave.
Manufacture materials and durability
The durability of crinoline depends on the quality of the materials it is made of. reinforced polyvinyl chloride (PVC)It is the same material used to produce quality inflatable boats, which guarantees its resistance to ultraviolet light, salt water and mechanical damage.
PVC fabric is made up of several layers: a polyester mesh base that provides tensile strength, and external protective layers. Crinolines are often used for high-density fabrics, as they are subjected to constant friction against water and possible contact with mooring structures.
Seams are the most vulnerable place in any inflatable structure. hot-vulcanizationIt's a monolithic compound that's as strong as the material itself, and adhesives have to be made with special two-component compounds.
How to extend the life of PVC materials?
Use UV filter sprays after each season. Keep a boat with floated but not completely deflated cylinders to avoid cloth cloth clogs. Check your pressure regularly, as pumping in the sun can cause the seams to rupture.
The lifespan of well-made and installed crinoline is 7-10 years of active use, but aggressive environments, oils and fuels on the surface of the water can shorten this period, so regular care is mandatory.
Installation and fastening technology
Installation crinoline It is a process that requires careful surface preparation and precise follow-up of instructions, errors in the installation phase can negate the benefits of the device or cause it to tear off on the go, the main methods of attachment are two: adhesive and combined (glue plus mechanical elements).
The adhesive method is the most common inflatable model, requiring thorough stripping and degreasing of the boat side, and the surface must be perfectly smooth and clean to ensure maximum contact area of the adhesive.
- 🧼 Preparation: Wash the board thoroughly, remove all contaminants, oxides and old paint. Use a special degreaser.
- 🖌️ Applying glue: Apply glue smoothly on both glued surfaces (board and crinoline), observing the drying time specified by the manufacturer.
- 🌡️ Ride: After connecting the surfaces, you need to carefully roll the seam with a solid roller, expelling all air bubbles.
☑️ Checklist before installation
To reinforce the structure, additional belts are often used, thrown over the side and fixed inside the boat, or special brackets, which is especially true for high-speed boats where hydrodynamic loads are high.
⚠️ Warning: Do not glue at high humidity or below the recommended temperature, which will cause the adhesive to not polymerize properly and the compound to be unreliable.
Care, maintenance and repair
Like any piece of equipment, crinolines require regular maintenance to maintain their properties. PVC's main enemy is ultraviolet light and dirt, which can act as abrasive. After each release, it is recommended to wash off salt deposits and freshwater contamination.
Periodically check the pressure in the cylinders. It should meet the manufacturer's recommendations, usually 0.15-0.2 atmosphere. Over-pumped balloon in the sun can burst, and under-pumped will be worse to perform its functions and wear out faster on the folds.
In case of minor punctures or cuts, repairs can be carried out independently with the help of a remix, which usually comes with a kit. For more serious damage, especially in the area of seams, it is better to contact a specialized workshop.
Keep the boat with crinoline in the shade or under the tent. Direct sunlight in the off-season greatly accelerates the degradation of plasticizers in PVC, making the material tough and brittle.
Timely detection and elimination of minor defects will avoid serious problems in the midst of navigation, and regular inspection of the condition of glue and seams should be a good habit for every owner.
Quality crinoline is an investment in safety and comfort that pays off on the first storm exit, keeping the crew dry and the boat stable.
Frequently Asked Questions (FAQ)
Can I install crinoline on an old boat with uneven sides?
Yes, PVC inflatable crinolines have some flexibility and can compensate for minor irregularities. However, highly curved surfaces may require individual fit or the use of additional gaskets. In complex cases, it is better to consult an installer.
How much does the crinoline reduce the speed of the boat?
With the right shape and size, the speed decrease is no more than 3-5 km/h, which is often imperceptible to the average user, and the loss of speed is compensated by the ability to go at higher speeds in choppy conditions, when without protection you would have to discharge gas due to splashing.
What pressure should be maintained in crinoline in winter?
It is better to clean the boat with crinoline for storage at reduced pressure (about 0.1 atm) to compensate for temperature changes. It is not recommended to completely blow them away to avoid the formation of deep cloths that are difficult to straighten.
Can I paint crinoline in a different color?
Use of conventional paints is not recommended, as they can destroy the structure of PVC or detach when deformed. There are special aerosol paints for PVC and inflatable structures that retain elasticity. Before painting, be sure to do a test in an inconspicuous area.
Why do you need crinoline on inflatable boats when they already have cylinders?
In inflatable boats, additional crinolines (often called inflated camera landing bars) serve to protect the main cylinders from abrasion against piers and stones. They take the blow, preserving the integrity of the main chambers, and create an additional volume to protect against spray.