Being in a small vessel in open water always involves vibration and shocks to waves, which quickly tire the operator and passengers. To minimize the negative impact of pitching and impacts on the spine, many owners of water transport are considering the possibility of installing an additional seat with an quenching of the oscillations. boat-depreciation It is a key element of ergonomics, turning a rigid plastic or aluminum chair into a comfortable captain's seat.
The choice of such equipment is a challenge for fishermen and high-speed hikers when standard solutions no longer meet the requirements of comfort. Modern technology allows you to implement damping systems even in compact boats, significantly reducing the load on the human musculoskeletal system. However, in order for the system to work correctly, you need to understand the types of designs and nuances of their integration into the existing interior of the cockpit.
In this article, we will discuss in detail what the shock-quenching mechanisms are, how to properly mount them and what to avoid when you are self-tuning. You will learn about materials that are not afraid of salt water, and how to calculate the mounting point for maximum efficiency. This guide will help you make an informed decision about the modernization of your vessel.
Design features and principle of work
The main task of any boat amortization system is to convert the kinetic energy of the hull impact on water into thermal energy or spring/gas compression energy. Depreciation rack It works in a way similar to car suspensions, but has its own unique features due to marine applications, the main difference being the course of the rod and the degree of rigidity, which are calculated based on the weight of the person and the dynamics of the boat.
The most common solution is the use of pneumatic or spring-hydraulic elements. Pneumatics allows you to adjust the rigidity by changing the air pressure, which is convenient for different swimming conditions and pilot weight. Hydraulic systems, in turn, provide a smoother quenching of high-frequency vibration, which is characteristic of the outboard motor.
- 🌊 Stock's move: Determines how deep a seat can go when hitting a wave, usually ranges from 50 to 100 mm.
- ⚙️ Damper type: There are models with a separate tank, an integrated cylinder or combined systems with a progressive characteristic.
- 🔩 Shell material: critical parameter, as the rack is constantly exposed to splashes, ultraviolet light and temperature changes.
It's worth noting that cheap spring-loaded versions without hydraulic damping can create a "jumping" effect, which at high speed is even more dangerous than rigid fastening. So engineers recommend paying attention to combined solutions where the spring holds weight and the hydraulics extinguish sharp movements. boat-depreciation It ensures predictable vessel behaviour and driver safety.
⚠️ Attention: The use of car shock absorbers without adaptation for marine conditions is strongly discouraged: their seals are rapidly destroyed by salt water, and the compression specifications are not suitable for vertical impacts of the boat hull.
Materials selection: corrosion and environment control
Aggressive aqueous environment does not spare metals, so the choice of materials for the fastening elements and the rack itself is a matter of survival of the equipment. Stainless steel AISI 316 is considered the gold standard for marine applications, as it contains molybdenum, which increases resistance to chlorides. However, even high-quality stainless steel requires care, especially in places of welds or mechanical damage.
Anodized aluminum alloys are also widely used, especially in structures where weight is important. Anodizing creates an oxide film that protects the metal from oxidation, but when scratches are locally violated, so it is important to use special marine sealants and insulating gaskets to prevent electrochemical corrosion when heterogeneous metals come into contact.
Plastic components, such as polypropylene or fiberglass, are often used for external casings and levers, they are completely inert to water, but can degrade under the influence of ultraviolet light. boat-depreciation It must have all the moving elements hidden from the direct sun, or be made of stabilized polymers.
| Materials | Resistance to corrosion | Weight. | Cost | Recommended application |
|---|---|---|---|---|
| Nerzh. steel AISI 316 | High. | Heavy. | High. | Fastening, rods, major knots |
| Aluminum 6061-T6 | Medium (covered) | Light. | Medium | Brackets, levers, platforms |
| carbon | inerteen | Very light. | Very high. | Premium tuning, racing boats |
| Plastic (PP/ABS) | inerteen | Light. | Low. | Leathers, decorative elements |
Special attention should be paid to rubber seals and omentums. Cheap models use regular rubber, which tans in the cold and cracks in the sun. Professional solutions use fluoro rubber (Viton) or special marine compounds that maintain elasticity over a wide range of temperatures.
Where and how to install the rack: mounting points
Installation of the depreciation system requires careful planning, since an incorrectly chosen installation site can disrupt the weighting of the vessel or weaken the design of the board. boat-depreciation It integrates into the existing captain's seat, replacing the regular leg or mounting between the seat and the rotating mechanism, and it is important that the point of application of force is located strictly below the seated person's center of gravity.
If the boat is cantilevered, you need to find reinforced frame elements for attaching the base. Drilling holes in the thin bottom or sides without installing additional reinforcing pentacles (plates) is unacceptable. Vibration from the shock absorber over time can lead to cracks in the hull of fiberglass or aluminum.
☑️ Plan for shock absorber installation
For PVC boats, the problem is that you have to create a rigid base for the mounting of the rack yourself, usually using a plywood or aluminum pad that is attached to stringers or inflatable tubes through special pockets. depreciation-stand should have the widest possible support area, so as not to push the soft bottom during sharp impacts.
⚠️ Attention: When installing PVC on boats, make sure that the lower platform of the shock absorber does not have sharp edges that can damage the cylinders during intensive rocking of the vessel.
The fasteners must be made of the same high-quality stainless steel as the rack itself. Using conventional galvanized bolts will lead to rapid rusting and acidification of the joints, which will make dismantling impossible without destroying the structure. Lithium Complex Grease.
Stiffness adjustment and weight adjustment
One of the main advantages of modern systems is the ability to fine-tune. Adjustment of pretension It allows you to adapt the suspension to the weight of the individual driver and equipment, and when you use the boat, the ability to quickly reconfigure becomes critical to maintaining comfort and handling.
In pneumatic models, the tuning is done through a special valve, which provides air from the pump. Pressure is usually indicated in the technical documentation in bars or PSI. In spring models, a adjusting ring is used, which is twisted with a special key, changing the degree of compression of the spring at rest.
How often should I check my blood pressure?
Pressure checks in pneumatic shock absorbers should be carried out before each season, as well as after long periods of parking, it is normal to reduce the pressure by no more than 5-10% per year, if the pressure drops faster, you need to check the tightness of the valve and the integrity of the membrane.
If you don't adjust it properly, you can go to two extremes: if the system is too soft, the seat will break through to the point on the big waves, giving the impact to the spine. If it's too rigid, the shock absorber will just not work, and you get the same sensation as on the hard mount. The ideal setup is achieved by sampling, when you press full weight, the stroke is about 20-30% of the total stroke of the rod.
Simple visual methods can be used to accurately diagnose the system. Examine the rod for oily stains, which is the first sign of failure of the osteoils. Also note the smoothness of the course: jerks or jamming indicate contamination of internal mechanics or deformation of the guides.
Tuning and modernization of existing systems
Owners who want to get the most comfort often resort to additional tuning. One popular solution is to install additional vibration insulators between the counter and the seat. Rubber dampers or special polyurethane inserts are able to cut off high-frequency vibration, which can not be extinguished by the main shock absorber.
The mounting base itself is also being upgraded, and the bearing-mounted rotary mechanism allows not only vertical impacts to be extinguished, but also free to rotate following the boat's roll, which reduces the load on the lower back when maneuvering. Depreciation counter in the boat in conjunction with the rotary bracket creates the effect of soaring, significantly reducing fatigue.
- 🛠️ Replacement of springs: installation of springs with progressive specifications (different thickness of the turn) improves the work on small and large irregularities.
- 💺 Seat upgrades: The use of memory foam materials in combination with a shock absorber gives a double effect of comfort.
- 🔧 Maintenance: regular lubrication of hinges and replacement of seals prolongs the life of the system at times.
And the aesthetics are also there, because chrome elements quickly lose their appearance in salt water, so many people switch to matte coatings or powder paint in the color of the interior of the boat, which is not only beautiful, but also creates an additional protective layer.
To extend the life of the chrome-plated elements of the shock absorber rod, use special protective chrome sprays after each trip, which create a thin hydrophobic film that repels salt water.
Safety and maintenance during operation
Every mechanical system requires attention, and marine depreciation is no exception. Regular maintenance involves washing with fresh water after each outing. Salt, drying, crystallizes and works like an abrasive, destroying moving parts and seals. A simple rinse procedure can increase the life of the equipment several times.
When you find backlashes in the joints, you need to immediately pull the fastener. Vibration has the property of unwinding even the most reliable threaded joints, if they are not fixed by a threaded fixer (anaerobic sealant). Using a medium-strength retainer allows you to dismantle the knot if necessary, but guarantees its immobility during operation.
⚠️ Attention: Never use WD-40 or similar penetrating lubricants to service the internal shock absorber mechanisms, which flush out the working lubricant and destroy the rubber seals, rendering the knot unusable.
If you depreciation-stand has a gas-filled cylinder, avoid heating it above 60 degrees Celsius (for example, do not leave the boat under direct rays of the sun with the awning closed in the heat without need). Increased temperature of the gas inside can lead to excessive pressure and damage to the glands. Winter storage should be carried out in a dry room, preferably in a disassembled or compressed state, so that the spring does not lose its properties.
Regular freshwater flushing and lubricating moving parts is 90 percent of the success in the long-term service of your depreciation system. Don't ignore prevention.
Can I install a shock rack on the inflatable seat?
Technically, it's possible, but it requires a rigid platform, inflatable seats are too soft and unstable for mechanical shock absorbers to work, you need to install a rigid base (plywood or aluminum) that will be attached to the boat's stringers, and then you can mount a rack on it. Without a rigid base, the effectiveness of blow suppression will be zero.
What is the maximum weight of a standard rack?
Most commercial models are designed for a weight range of 60 to 120 kg. There are enhanced versions for professional use, withstanding up to 150 kg or more. It is important to choose a model with a margin of safety, taking into account not only the weight of the body, but also the possible dynamic load when jumping through the wave.
Do I need to take out the rack for the winter?
Complete disassembly is not required if the system is in good working order, but it is recommended to remove the seat with the counter and remove it in a warm dry room, which will protect the mechanism from temperature changes and condensation inside, which can freeze and damage the seals.
Does the shock absorber affect the stability of the boat?
With proper installation and alignment, the impact on the overall stability of the vessel is minimal, but the presence of a movable element adds a degree of freedom. At high speeds, this may require a slight adaptation of the steering style, as the steering wheel's response to the movements of the pilot's body becomes smoother, but less direct.