DIY hovercraft

Blowing out ears at home

The content of the article

Blowing the auditory tubes is an effective method of equalizing external and internal pressure on the eardrum. Physiotherapeutic manipulations can eliminate local manifestations of ear diseases such as tubotympanitis (eustachitis), catarrhal and diffuse otitis. The main goal of the procedure is to eliminate the feeling of stuffiness in the ears and prevent rupture of the eardrum.

To normalize the pressure inside the ear, it is necessary to restore the patency of the Eustachian tube. It is she who performs the ventilation function, connecting the ear cavity with the nasopharynx. At the level of the posterior wall of the oropharynx, the auditory canal ends with a one-way valve called the tubal ridge. It opens only when yawning and swallowing, which helps redirect air masses into the eardrum and, accordingly, equalize external and internal pressure on the eardrum.

Torsion bar machine

As already mentioned, these cold forging machines allow you to make longitudinal bends on the rod. This is a relatively simple design. The main task is to fix one end of the rod motionless, attach a lever to the second, with which you can twist the workpiece.

A piece of profiled pipe with a thick wall (at least 3 mm) is suitable as a base. The retainer can be welded from the same rods, leaving a square gap of the required diameter. You can use a properly sized cable clamp (available at a rigging store). Any of these stops is welded to the base.

Cable holder - great for holding rods

Next, you need to somehow ensure grip and torsion of the second part of the workpiece. This can be done using two bearing units. A pipe of a suitable diameter is inserted inside, and a handle is welded to it on one side - the design resembles the letter “T”. On the other hand, a clamp is made in the pipe: four holes are drilled, nuts for 12 or 14 bolts are welded into them. The result is a good clamp - the bolts are tightened after the rod has been inserted.

Next - a matter of technique - use a lever to screw in the required number of turns. This is not to say that this work is for weaklings, but with a lot of leverage, everything is not so difficult.

An even simpler machine for making torsion bars using cold forging is in the next video.

Purpose of blowing

By performing ear blowing at home, you can eliminate the feeling of congestion and fluid transfusion in the middle ear cavity. The most common causes of discomfort are:

As a result, the lumen in the auditory canal, which communicates the ear with the nasopharynx, is greatly narrowed. This leads to disruption of the ventilation function of the Eustachian tube and the development of negative pressure in the ear cavity. Inside the organ of hearing, oxygen is constantly absorbed by the tissues of the mucous membranes. For this reason, low pressure is created in it, which causes the eardrum to retract into the middle ear cavity.

Pressure changes and blockage of the ear canal lead to the accumulation of serous effusions in the ear, which is one of the main reasons for the sensation of fluid transfusion in the hearing organ.

Correctly performed blowing of the auditory tubes at home leads to an increase in their lumen and restoration of drainage and ventilation functions.

Motor selection

Motors were found for gardening equipment, with a vertical shaft, a Ruslight 1P64FV gasoline engine - the weight, power and even the price of two small ones, the same as one large one. In addition, the small fan matches the speed of the gearless motor and fits neatly directly onto the output shaft.

The fan was based on the same KAMAZ one, I really liked it for its solidity and strength, however, the impeller had to be cut down quite a bit for the design conditions.

The simplest calculations gave a matched fan diameter of 430 mm. However, as a result of much thought, I settled on a diameter of 450 mm, standard for other similar fans (in particular, from GAZ-53).

Indications for use of the procedure

Before resorting to a physiotherapeutic procedure, you should consult a specialist. Incorrect manipulation can cause serious barotrauma,

up to the rupture of the eardrum. In addition, blowing is not recommended for myringitis, i.e. inflammation of the tympanic membrane. A sudden change in pressure can lead to pain and inflammation in the inner ear.

You can perform manipulations to restore pressure if you have the following symptoms:

In the presence of serious ear diseases, blowing is performed on an outpatient basis using a special catheter or a Politzer device.

The above signs in 90% of cases indicate accumulation of fluid in the ear cavity and, accordingly, blockage of the ear canal. However, it should be taken into account that the effectiveness of the manipulations depends on the frequency and correctness of special exercises.

Air-cushion boats on the Russian market

As mentioned above, the first production release of the hovercraft took place in the mid-twentieth century. A lot of time has passed since then, and of course it is simply impossible to consider all the modifications for a hovercraft. But for a superficial acquaintance, we made a small selection of hovercraft manufacturers, which we now bring to your attention.

Leaders of past years

The Central Design Bureau "Neptune" has been developing hovercraft in Russia since 1958. Engineers design boats of various designs, and shipbuilding factories directly engage in serial production of models. Since its founding, many hovercrafts have been built according to the design drawings of the Neptune Central Design Bureau, some of which are successfully produced and operated to this day. Among such successful models, it is worth noting the following samples:

• SVP "Bars" (first produced in 1976, a total of about 40 units were produced, used for postal transportation and search and rescue teams);
• SVP "Gepard" (produced since 1984, more than 100 copies produced, used for household needs and patrol service);
• SVP "Sobol" (produced 1990-1994, about 30 samples were produced, intended for tourism and boat trips);
• KVP "Yamal-730" (produced since 2011, commercial production and law enforcement agencies have already purchased several dozen units of this equipment).

You might be interested: Boat “Rhythm” - technical specifications, owner reviews, photos

Note that the production of hovercrafts is usually made to order. But at the same time, not only Russian services, but also foreign users appreciated the advantages of the Neptune Central Design Bureau vessels.

DIY hovercraft

Serial hovercraft

Boats for private use

Cushion boat for one

Modern Russian manufacturers

As for the state of affairs today, STOLs are, frankly speaking, rare in the water transport market. However, there are several companies whose activities are related to the sale or their own production of hovercrafts. We suggest you briefly familiarize yourself with them using the following table.

Here are the main points of sale of hovercraft in Russia. Also, do not forget that you can assemble a hovercraft with your own hands, but to do this you must at least have a technical education and a sufficient financial budget. Good luck!

Concept boat from the Volkswagen concern

Concept hovercraft

Another version of the concept boat

Hovercraft concept

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Blowing methods

How to blow out your ears at home? There are at least 10 methods for independently blowing the auditory tubes. Most of them were developed to prevent barotrauma in professional divers, submariners, pilots, etc. Many of them can be used as additional physiotherapeutic treatment for ear diseases and the consequences of otitis media.

Important! It is strictly not recommended to perform blowing in the presence of infectious processes in the nasopharynx. This can cause pathogens to enter the middle ear cavity, which can lead to the development of purulent otitis media.

To open the mouth of the ear canal and restore normal pressure inside the ear, the following can be used:

Most of the above techniques do not require the use of special devices. However, to achieve the desired therapeutic results, it is important to perform physical therapy procedures correctly. The simplest but most effective ways to restore normal patency of the auditory canals are described below. In the 1xbet mirror you can place not only classic bets on sporting events, but also work in Live mode. Here it is implemented quite conveniently, the administration is constantly working to create the most comfortable conditions. Before placing live bets, you need to create an account (if you have not previously been a client of the bookmaker) and top up your deposit using one of the convenient methods. After this, you can freely use bonuses and earn money.

What kind of devices are used?

Cold forging is characterized by various curls, bends, twisted rods, etc. Almost every type is made on a separate device - a specific machine. They can be driven manually or electrically. For small volumes “for yourself”, manual cold forging machines are used. Although they are not particularly productive, they are much easier to manufacture. If it is necessary to put production on stream, similar devices are made, but with electric motors. In this case, there is almost no need to physically work, but the complexity of making the device increases significantly. In our material we will talk about manual machines for cold forging.

What devices are used:

This is what a torsion bar and the machine of the same name look like

This is how they make a flashlight

Device for cold forging snail - for forming curls

For bending anywhere and at any angle - bending machines (bending machines)

Machine "Volna" - for the formation of the appropriate relief

Machines for shaping the ends of rods. In this case - crow's foot

For a beginning craftsman, the most relevant machine for cold forging is a snail. Only with its help you can make many interesting things - from a fence and gate to a bench and other similar products. In second place in terms of necessity is a torsion bar machine. It adds variety to the details. All the rest can be purchased or made as you improve and gain skill.

Valsalva method

The Valsalva method is one of the simplest methods of blowing out the ear canals, which is used to relieve local manifestations of tubotympanitis and catarrhal otitis. To implement the technique, you need to take a deep breath and, pressing your nostrils to the nasal septum, exhale through your nose.

Important! Do not exhale sharply during the procedure, as this may damage parts of the inner ear.

Performing the Valsalva technique forces air into the nasopharynx, allowing it to penetrate the ear canal. This helps to increase the lumen in the Eustachian tube and the outflow of fluid from the middle ear. However, it should be noted that blowing out the ears at home can cause the following complications:

Before performing a physiotherapeutic procedure, it is advisable to clear the nasal passages of mucus. To prevent pathogenic flora from entering the ear canal, you need to rinse your nose with saline solution.

About the electric torsion bar drive

The author of the video presents a multifunctional machine with twisting in various planes, including torsion:

Wave and zigzag

If you do not need curls and circles, but only small bends - wavy or zigzag, sharper, then you will need a “bend”. We have already talked about its equipment. Now let's explain that the operating elements (there are three of them - two static, one movable) can be replaced. So round shafts for a soft wave can be replaced with wedges with sharp corners, which gives an even and clear zigzag.

Toynbry technique

The technique is based on forcing air into the Eustachian tube not during forced exhalation, but during swallowing. At the moment of swallowing saliva, the opening of the auditory canal widens. With swelling of the mucous membrane

The nasopharynx in the oral cavity increases air pressure, which penetrates the tympanic cavity and thereby restores normal pressure on the eardrum.

How to self-bleed your ears? To eliminate congestion and heaviness in the head, you need to do the following:

The procedure must be repeated until a click occurs in the ears, signaling the equalization of internal and external pressure. This method of blowing out ear tubes is one of the safest, so it can be used to eliminate the symptoms of otitis media in children over 5 years old.

Making a homemade machine

Recently, metal products created by forging have become very popular due to their attractiveness.

Such products usually have a fairly high price, so it is rare to get all the interior decorations that you would like. In addition to the hot forging method, there is a cold variation. It can be used by creating a cold forging machine with your own hands.

Otovent method

The Otovent method is a home analogue of the Politzer method of blowing ear tubes. To perform the procedure, you need to purchase a so-called “Otoventa” balloon at the pharmacy. The simple device is a balloon with a plastic tip that is inserted into the nostril to clear the eustachian tube. During the procedure, there is virtually no risk of a critical increase in pressure inside the ear, which is due to the high elasticity of the ball used.

To eliminate congestion and normalize the outflow of fluid from the ear, it is advisable to perform physiotherapeutic manipulations daily for 4-5 days. How to blow out your ear at home?

The success of the technique will be indicated by a characteristic click in the ear.

Creating a homemade forging machine

The first step is to find a metal sheet. When choosing the size of the canvas, you should rely on the number of patterns that will be placed on it.

As for the placement of templates, you need to place them so that they are at a distance from each other, but you should not place them too close, crowding them together. During the forging process, parts may shift due to lack of space, and if the parts are too far apart, the forging process can become significantly more difficult.

The nozzles can be changed using a rectangle-shaped slot. It will be possible to put models into it for forging for replacement.

They must be attached to metal strips, which, in turn, will have the shape of a rectangle. As for the nozzles, they will be secured using regular bolts.

Muscle training

Most people do self-deflation incorrectly due to poor control of the nasopharyngeal muscles. To take control of the muscles of the palate, nasopharynx and epiglottis, you should perform a few simple exercises. Some of the most effective ones include:

It is advisable to do the above exercises 3-4 times a day until the patient feels complete control over the muscles of the soft palate and epiglottis. The ability to control the muscles of the nasopharynx increases the efficiency of procedures for blowing out the auditory tubes by at least 30-40%.

Source

Weight load

Let's calculate (approximately) the components of the weight load. 1. Weight of the body (assuming 20 kg per 1 m2 of pillow area) Pk = 20·S = 20·4 = 80 kg. 2. Fan motor weight 50 kg. 3. Fan weight 20 kg. 4. The weight of the propeller engine is 30 kg (the engine is assumed to operate “directly” with the gearbox and clutch removed). 5. Propeller weight 5 kg. 6. The weight of the foundations for the fan motor is 8 kg. 7. The weight of the foundations for the propeller engine is 12 kg. 8. Propeller guard 3 kg. 9. Steering device 7 kg. 10. Gas tanks and gas lines 5 kg. 11. Controls 5 kg. 12. Seat weight 5 kg. 13. Fuel weight 20 kg. 14. Load capacity (2 people) 140 kg. Total: 400 kg

Hearing impairment

The functioning of the hearing aid depends on balancing the effect of external and internal atmospheric pressure on the eardrum. The expansion of the mouth of the Eustachian tube under the influence of the soft tissues of the palate during swallowing ensures that air enters the tympanic cavity. After oxygen is absorbed by the epithelial mucosa, the pressure inside the ear decreases. The Eustachian tube compensates for the resulting pressure difference.

Conduction disorders of the ear canals reduce the lumen in the tube with a decrease or loss of ventilation functions, accompanied by the following symptoms:

Differences of cold forging

The main difference in the procedure is that there is no additional heat treatment, that is, heating. Deformations are carried out under normal temperature conditions for steel.

Construction of cold forging machines

Depending on the variety, the design varies, but there are common features:

Other design features depend on the species.

Equipping a torsion bar cold forging machine with an electric drive

Electrification is a pointless exercise and costly if you need to bend one or two workpieces. But if you intend to make curved elements for an entire fence or do this professionally, then you cannot do without the help of an electric motor. What does it give:

If you are planning a large-scale production, it is necessary to supply a motor and belts to transfer energy into mechanical movement, but calculations must be made first.

Blowing procedure

The physiotherapeutic procedure of blowing the ears involves introducing air through the auditory canal into the middle ear area. Blowing is carried out on an outpatient basis with a special catheter, or a Politzer device, for such serious ear diseases as:

Blowing out the ear canals using a Politzer device

Before the procedure, it is necessary to completely clear the nasal passages of mucus and relieve swelling of the nasopharynx with vasoconstrictor drops.

The disinfected tip of the balloon is inserted into the nasal canal and clamped with the wing of the nostril to seal.

The patient pronounces the word “steamer” clearly, syllable by syllable. When pronouncing vowel sounds, the doctor presses the balloon, which forces air flow into the ear canal.

Using an otoscope, the doctor evaluates the sounds heard:

The Politzer ear blowing procedure is performed by an otolaryngologist. A procedure performed incorrectly can cause pain and harm the patient's health.

The ear canals are ventilated in both ears. To restore patency, it is necessary to perform 5 procedures at intervals of 1-2 days. If blowing does not bring a visible effect, the patient is offered other treatment options.

Buoyancy

Quite an important point. There are models that, when the engine is turned off, go under water. They are able to withstand the weight of 1-2 people, but if in addition to two passengers you have cargo, then this may be enough to sink the ship with the engine turned off.

For normal buoyancy, special containers filled with any of the floating materials are hung under the side of the boat. On models above the middle class, this is almost always basic equipment. On smaller hovercrafts, such cylinders may not be available and are installed as an additional option. But even if you have provided the boat with the necessary unsinkability, there is one more nuance associated with reaching the cushion of a loaded vessel. The boat may simply not reach the required height, and therefore you will not be able to start moving until you unload the boat.

Read Aerosleigh for fishing with your own hands

If you are anchored somewhere in the middle of Lake Baikal, then unloading and loading will be quite problematic. Don't forget about this.

Methods for performing blowing at home

As an additional treatment for impaired conduction of the ear canals and complications of otitis media, independent use at home of techniques developed to prevent professional barotrauma in divers, submariners and pilots is recommended. Before performing the procedures, the nasal passages are cleaned with a saline solution, which prevents the penetration of pathogenic flora into the ear canal.

Valsalva maneuver

The Valsalva maneuver involves creating high pressure in the middle ear, which helps clear the cavity of pus. The effect on the eardrum of air forced into the pharynx serves to increase the lumen of the Eustachian tube, which removes purulent masses out.

The procedure is carried out according to the following algorithm:

The method is also used in the treatment of turbootitis - impaired conductivity of the Eustachian tube caused by a complication of vasomotor rhinitis.

Method "Otovent"

An effective method of orthograde ventilation of the tympanic cavity is the use of "Otovent", which serves as an alternative to the physiotherapeutic procedure of blowing according to Politzer. Blowing includes performing the following procedure:

Ventilation of the tympanic cavity using Otovent

Using Otovent has a number of advantages:

In some cases, the use of the Otovent device brings a visible effect without consulting a doctor.

Toynbry technique

When using the Toynbrie technique, air is forced into the auditory tube by swallowing. Restoration of pressure on the eardrum occurs when swallowing, equalizing the increased pressure of the swollen mucous membrane of the nasopharynx.

The procedure must be performed in the following order:

Repeat until a click occurs , signaling that the internal pressure in the ear is balanced with the external one.

The safety of the procedure makes it possible to use it in the treatment of otitis media in children over 5 years of age.

Lowry technique

This method influences the movement of the pharyngeal muscles on the valve that blocks the entrance to the tympanic cavity.

Edmonds maneuver

Edmons blowing is the exhalation of air with the movement of the lower jaw while nasal breathing is blocked.

The technique works in two directions:

Homemade “Snails”

In essence, this is a modernized bending machine (pipe bender), but these improvements make it possible to easily make curls from fairly thick rods (up to 10-12 mm cross-section) and repeat them with a high degree of accuracy.

One of the homemade cold forging machines

These cold forging machines have several designs, but the easiest to implement is the one with a round table with a central leg. A lever with rollers on bearings at the end is movably attached to the leg. They make the bending process easier.

The table surface can be made of steel sheet with a thickness of 10 mm or more. For the leg, you can use any thick-walled round pipe. It is important to make the structure stable, since lateral forces will be applied, so side posts, spacers, and a stable base are needed.

Drawing of a cold forging machine “Snail”

It is easier to make a lever from a square pipe with a thick wall - at least 2-3 mm. The cross-section of the pipe is 25*40 mm or so. Attaching the lever to the leg can be done on a bearing, or you can simply take a small piece of thick-walled pipe of a larger diameter, put it on the leg, and weld a stop strip on the bottom so that the lever does not fall down. The option with a bearing gives easier movement, but if there is lubrication, the second option also works.

Lever mounting option

The shape of the lever is also important. The lever is double, the upper part is working, the lower part is supporting. Wherever there are connections, it is advisable to add reinforcement, since the efforts are significant.

The lever must be reliable, with reinforcement

A mandrel or jig is fixed on the table - the shape along which the curls are bent. They are made in different diameters so that you can make curls of different diameters. Such mandrels can be prefabricated to form a larger number of bends. Each such sample must have rods that are installed in holes in the table. This is how this template is fixed. Also, its shape must be designed in such a way that the end of the rod is well fixed in it.

Variant of conductors for the snail

Often, mandrels are machined from a metal circle of a suitable diameter using a grinder, but there are options made of metal with steel plates welded onto it, curved accordingly.

How to make a similar machine for cold forging is in the next video. There is also a good description of how to bring the ends of the workpiece to a decent state - ordinary raw edges look very rough. There is special equipment for processing them, but, as it turns out, you can do it without it.

Contraindications and complications

The use of ear canal blowing techniques should be prescribed by an otolaryngologist . Their use has a number of contraindications:

Deviations from the rules of procedures and inattention to contraindications can lead to negative consequences:

Procedures for blowing out the ear canals performed at home can additionally lead to complications:

Ear blowing, done correctly and in a timely manner, improves ventilation and restores the drainage function of the Eustachian tube.

Source

Recovery after

No special manipulations, medications or folk remedies are required after the ear blowing procedure.
After the procedure, the patient feels well and does not require a recovery period; he can go home. If, after carrying out the blowing procedure using any of the existing methods, undesirable manifestations appear, then it is necessary to urgently seek help from a specialist.

Among these symptoms:

• nose bleed;
• severe tinnitus;
• dizziness;
• discharge from the ears;
• convulsions.

Any discomfort in the ears or nasopharynx should force a person to consult an otolaryngologist about this.

Indications

With various diseases of the hearing organ, there is a risk of fluid accumulation in the inner ear.
In such a situation, the following manifestations arise: Using the blowing procedure, it is possible to cope with a decrease in the patency of the auditory canal.

Due to this, this method is actively used in the following situations:

For what diseases is it performed?

There can be quite a few reasons for discomfort in the ears. Blowing is performed for the following pathologies:

The listed factors often provoke obstruction of the Eustachian tube. Blowing helps restore it.

System differences

There are two types. The first is a standard economy option. The second is more advanced and improved. Standard SVP is used in most cases, especially if there are no significant differences on the surface to be coated. The base element has a flat base and is clamped from above with a wedge. In this way, the position of the tile is fixed, identical seams are set, and minor irregularities are smoothed out.

The premium system, in addition to being more expensive, is distinguished by a specific structure - the base of the joint insert has a curved shape. At first, this seems like a drawback and causes confusion, why is it better? However, despite the fact that the base initially displaces the tile, after it is fixed with a clamp, self-leveling occurs. The plate bends as much as necessary for even laying of tiles and distribution of glue relative to existing floor defects.

Read How to catch roach in autumn and choose working baits

Methods

Today there are quite a few effective ways to perform blowing. To choose the best one, you should contact a specialist.

According to Politzer

This procedure is performed in a hospital setting. For this, a rubber balloon is used, the capacity of which is 300-500 ml. It is connected to a tube ending in an olive. It is this that is placed in each nostril in turn, after which the nose is tightly pinched. These manipulations allow you to securely fasten the olive.

Then the patient takes a sip of water and says special words - for example, “peek-a-boo” or “Steamboat”. This ensures elevation of the soft palate. At this moment, the balloon is gently compressed.

The procedure is monitored based on the patient’s sensations. The doctor may also use an otoscope for this purpose. If the session is successful, the doctor and patient feel a slight noise. After it, the congestion disappears.

Watch in our video how Politzer blowing is carried out:

Valsalva

This simple method is most often used for blowing. To do this, a person must take a strong breath, then close his nostrils and try to exhale through his nose. Its duration should be no more than 2 seconds. Due to this, the pressure in the nasopharynx increases, which leads to the release of air through the Eustachian tubes.

Toynbry technique

This procedure also successfully copes with the feeling of congestion in the ears. In this case, pressure is applied when swallowing. At this moment, the pipes open, and when the nose is pinched, the pressure in their area increases. This method is considered the most natural way to relieve ear congestion.

To do this, you need to close your nostrils with your hands, take water into your mouth and swallow it. This procedure must be done until the discomfort is completely eliminated.

Otovent method

This method is considered the simplest analogue of Politzer ear blowing. It can be easily used at home. To do this, you need to buy an Otovent cylinder. It is a balloon equipped with a nose piece.

To perform blowing, you need to close the nostril with your finger and tightly insert the balloon nozzle into the other. Then you need to take a strong breath, close your mouth and exhale. In this case, you need to try to inflate the balloon with your nose. The end result should be the size of a fist.

Similar actions must be performed with the second nostril. The effectiveness of the procedure can be judged by the characteristic click.

Ear blowing methods

How to purchase such a vehicle or how to make it yourself?

Hovercraft is an expensive type of transport, the average price of which reaches 700 thousand rubles. Scooter-type transport costs 10 times less. But at the same time, one should take into account the fact that factory-made vehicles are always of better quality compared to home-made ones. And the reliability of the vehicle is higher. In addition, factory models are accompanied by factory warranties, which cannot be said about structures assembled in garages.

Factory models have always been focused on a narrowly professional area related to either fishing, hunting, or special services. As for homemade hovercraft, they are extremely rare and there are reasons for this.

These reasons include:

• Quite a high cost, as well as expensive maintenance. The main elements of the device wear out quickly, which requires their replacement. Moreover, each such repair will cost a pretty penny. Only a rich person will afford to buy such a device, and even then he will think again whether it is worth getting involved with it. The fact is that such workshops are as rare as the vehicle itself. Therefore, it is more profitable to purchase a jet ski or ATV for moving on water.
• The operating product creates a lot of noise, so you can only move around with headphones.
• When moving against the wind, the speed drops significantly and fuel consumption increases significantly. Therefore, homemade hovercraft is more of a demonstration of one’s professional abilities. You not only need to be able to operate a vessel, but also be able to repair it, without significant expenditure of funds.

Building SVP Grom How to Build inflatable Hovercraft “THUNDER” Air Cushion Vehicles ACV

Watch this video on YouTube

How to do it at home

Performing this procedure on your own is fraught with certain consequences. Therefore, before starting blowing, it is still worth getting a consultation with an ENT doctor.

What you need to know

It is recommended to blow out your ears very carefully. It is not recommended to use excessive air pressure - otherwise there is a risk of rupture of the membrane or membrane of the cochlea.

According to reviews, such complications are most often observed when using the Valsalva method.

Possible consequences

The most common complications include the following:

Dangerous symptoms

To avoid negative health consequences, it is very important to monitor your well-being after the procedure. The following symptoms may be a cause for concern:

How to bleed your ears yourself:

Areas of practical use

Despite the ability for fast and, most importantly, economical movement, the scope of application of a hovercraft on the surface of the earth is significantly limited. Asphalted areas, hard rocks with the presence of industrial waste or hard stones are absolutely unsuitable for it, since the risk of damage to the main element of the hovercraft - the bottom of the cushion - increases significantly

Thus, the optimal hovercraft route can be considered one where you need to swim a lot and drive a little in places. In some countries, such as Canada, hovercraft are used by rescuers. According to some reports, devices of this design are in service with the armies of some NATO member countries.

Assembling the device

We recommend that all elements at the preliminary stage be connected to not very strong fasteners (you do not need to work with welding right away), since errors could have been made during the design. Start with the bolts and then do a test run. If you are completely satisfied with the design, then you can make the final assembly with the strongest connections, including using a welding machine.

Connecting and painting parts

The inside of the snail, which is in constant contact with the workpieces, should not be painted, but only carefully polished - without snags or rust. The remaining parts can be coated with any paintwork.

How to get around a stone

So, the question is – do it yourself or buy ready-made equipment? If you need high performance and accuracy, then it is better to order a factory unit. In the case when you need to bend one or two blanks, you can make the simplest “bend”.

What is a hovercraft?

This is a device that combines the functions of a car and a boat. The result was a hovercraft (hovercraft), which has unique cross-country characteristics without loss of speed when moving through water due to the fact that the hull of the vessel does not move through the water, but above its surface. This made it possible to move through the water much faster, due to the fact that the friction force of the water masses does not provide any resistance.

Although the hovercraft has a number of advantages, its field of application is not so widespread. The fact is that this device cannot move on any surface without any problems. It requires soft sandy or soil soil, without stones or other obstacles. The presence of asphalt and other hard bases can render the bottom of the vessel, which creates an air cushion when moving, unusable. In this regard, “hovercrafts” are used where you need to sail more and drive less. If on the contrary, then it is better to use the services of an amphibious vehicle with wheels. The ideal conditions for their use are difficult, swampy places where no other vehicle except a hovercraft (hovercraft) can pass. Therefore, hovercrafts have not become so widespread, although similar transport is used by rescuers in some countries, such as Canada, for example. According to some reports, SVPs are in service with NATO countries.