How much time and effort will be required for the preparation launcherIt's always relevant for inflatable swimmers. Incorrectly pumped can lead to deformation of the bottom, rapid wear of the seams or, conversely, to insufficient rigidity of the structure, which is dangerous when faced with a wave. Understanding the physical processes that occur with polyvinyl chloride under air pressure is key to the durability of your equipment.
Many beginners mistakenly believe that the boat should be rocked "to the point" or, conversely, "a little bit", not realizing that there are clear technical regulations. Pressure in cylinders It has a direct impact on the rideability, stability and safety of the crew, and if you pump the sides, they will become "oak" and can burst in the heat, and under-performed sides will turn the boat into an unruly raft.
In this article, we will discuss in detail the time costs, the necessary pressure parameters for different models and the nuances of working with different types of pumps. You will learn why ambient temperature plays a critical role and how to avoid common mistakes in preparation. PVC boats To the waterway.
The effect of air temperature on the pumping of the boat
The physics of the process dictates its conditions: gas expands when heated, and compresses when cooled. This is a fundamental rule to consider when determining how much to pump your boat. cylinders In a cool garage or early in the morning, and you plan to go out to the water in the midday heat, the air inside will inevitably warm and expand.
As a result of this expansion, the internal pressure It can exceed the permissible limits, which will lead to rupture of seams or deformation of bulkheads, and vice versa, if the sun-inflated boat gets into cold water or stays overnight at low temperatures, it will "deflate" and lose its driving qualities.
⚠️ Warning: Never leave a fully pumped boat in direct sunlight unattended, and the pressure inside the cylinders can grow so much that it will cause permanent damage to the structure.
Experienced water engines always leave a small reserve or, conversely, a lack of pressure depending on the weather forecast. The optimal is the pumping of the boat immediately before launching into the water in the temperature conditions in which it will be operated. This prevents sharp jumps in internal pressure.
- 🌡️ When pumping in a cool room (+15 C) to go out in the heat (+30 C), do not reach the maximum pressure, leave a reserve of about 10-15%.
- ❄️ If you are pumping a boat in the cold, remember that when applied to heat it will dramatically increase the volume, which can be dangerous.
- ☀️ In sunny weather, cover the cylinders with a light cloth or awning to minimize the heating of the air inside.
Optimal pressure in cylinders and inflatable floor
Every model. fly-boat The recommended pressure for airborne cylinders is usually between 0.2 and 0.25 atmospheres (kgf/cm2), although some high pressure models require up to 0.4-0.6 atmospheres.
Special attention is required bottom (NHPD), which often requires higher pressure to provide a stiffness comparable to plywood floorboard, will cause it to deflect under the weight of passengers, which will worsen hydrodynamics and make the boat less stable on the course.
Why can't you swing it?
Visual hardness is often misleading: To the touch, the balloon may appear hard as early as 0.15 atm, while the working one is 0.25 atm. Using a pressure gauge is the only way to ensure proper pumping.
It is almost impossible to determine the difference between 0.2 and 0.25 atmosphere on the eye, especially if you have been rocking for a long time and your hands are already clogged.
| Type of element | Recommended pressure (atm) | Pumping time (hand pump) | Risks of violation |
|---|---|---|---|
| Onboard cylinders | 0.20 - 0.25 | 10-15 minutes | Deformation, loss of stability |
| inflatable floor (NDB) | 0.40 - 0.60 | 15-20 minutes | Bottom deflection, complexity of management |
| Keel (if any) | 0.60 - 0.80 | 5-7 minutes | Speed dip, yaw. |
| transom board | Don't pump. | - | N/D |
Time Costs: Manual vs Electric Pump
The time required to bring the boat into working condition depends on the type of equipment used. Hand pump (feather or double-barreled) requires physical effort and time, which varies from 15 to 30 minutes depending on the volume of the boat and the training of the operator.
Electric pumps powered by a battery or car lighter speed up the process, but there is an important caveat: most car pumps are not able to create pressures above 0.2-0.25 atm, which is enough for the sides, but not enough for the sides. NDMATherefore, a combined method is often used: electricity up to 80-90% of the volume, and then manually or a special high-pressure pump to work.
In the case of electric pump It's important to monitor the temperature, and long-term high pressure work can cause the engine to overheat, and take breaks if you feel that the pump is too hot.
- 🏃♂️ Manual pump: reliable, regardless of the presence of current, but requires physical strength and time (20-30 minutes).
- 🚗 Car compressor: quickly fills the volume, but often does not finish to the desired pressure and requires a working engine of the car.
- 🔋 Battery pump: Mobile and fast, but limited by battery power and often has low performance at high pressures.
Stages of proper pumping of PVC boat
The pumping process must be done in sequence to ensure that the load is evenly distributed to the seams and materials. cylindersIt's not up to full pressure, but up to about 50 to 60 percent, and it allows you to straighten the folds of fabric and give the boat its original shape.
Then there's the inflatable floor line (if there is one) and the keel, and they need to be pumped to the working pressure, because they form a rigid structure, and then the end-of-the-line cylinders are finished to the desired parameters, which prevents distortion and uneven tension of the fabric.
☑️ Pumping procedure
Once the pump is complete, be sure to check all the valves. Sometimes the valve petals may be contaminated with sand or grass, leading to slow air etching. Wipe the valves with a clean cloth before installing the pump.
⚠️ Warning: Do not try to speed up the pumping process by jumping through the stages. Attempting to inflate the balloon immediately to the maximum can cause the boat to take the wrong shape and squeeze the internal partitions.
Typical errors in pumping and their consequences
One of the most common mistakes is to ignore the gauge in favor of the tactile sense. touch-hardness In cold water, the boat will appear softer, and an inexperienced user may decide to pump it, which will lead to pumping when heated.
Another mistake is using non-standard adapters or trying to connect a powerful industrial compressor directly, a sharp jump in pressure and air flow can damage the internal structure of the valve or even break the seam from the inside. Smooth pumping It's safer for PVC material.
Use adapters only (original) or quality analogues, exactly the diameter of the pipe of your valve, so as not to damage the rubber seals.
Also, the control check is often forgotten 10-15 minutes after pumping, the material has the property of stretching a little ("sit"), and the pressure may drop slightly, and the air finishing after such a "shrink" will ensure stability during the entire fishing or cruising.
Care of pumping equipment and valves
To keep the question of how much to pump from becoming a problem because of a breakdown in the equipment, you need to take good care of the pump. Hand pump pistons require periodic grease with silicone lubrication to keep the seals tight and easy to run. Dust and sand, when they get inside the cylinder, work like an abrasive, breaking the seals.
Boat valves also need care, and after each operation, they should be washed with fresh water, especially if the boat was used in salt water or muddy rivers. Dried dirt in the valve mechanism can cause the boat to be unable to pump properly next time.
Regular maintenance of the pump and valves prolongs the life of the equipment and ensures that you can always quickly and correctly prepare the boat for the water.
It is better to store the pump in a disassembled form or with weakened springs (if the design allows), so that the rubber bands do not lose elasticity from constant compression. diaphragm-pump.
How often should I check the pressure in the boat while parking?
During long periods of sun exposure, the pressure should be checked every 30-40 minutes; if the boat is in the shade or on the water, check once every 2-3 hours; abrupt changes in the weather (for example, the sun’s care for clouds) also require monitoring.
Can I drive a boat with a truck compressor?
The use of powerful industrial compressors is highly discouraged without a gearbox and a precise pressure gauge. They create excessive pressure that can instantly break the seams of a PVC boat. It is safer to use specialized PVC pumps.
What to do if the pressure gauge shows different pressure on the cylinders?
A small difference (0.01-0.02 atm) is acceptable and often due to the error of the device or uneven heating. If the difference is significant, check the tightness of the "soft" balloon and if necessary, pump it to normal.