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Guide to studying in an aviation school

Aviation school

Being an airline pilot is a professional career that can be exciting and attractive, as well as being one of the best-paid jobs today. Taking to the skies and living on a constant journey can fulfill the dreams of many young people who aspire to one day be part of an airline. But to achieve that dream you will first have to be trained in an aviation school where you acquire the necessary skills.

Bicycle greases and lubricants: The complete guide to use

Bicycle greases

Being a purely mechanical means, the components of a bicycle are subjected to friction, rolling and metal-on-metal clutches, which must be attenuated through the use of greases and lubricants. The main task of lubrication is precisely to reduce the frictional wear of the components, protect them from atmospheric oxidation, from washing out with water, and prevent excessive heating.

Lubrication, in the world of bicycles, can be divided into two main categories:

  • Lubrication with grease;
  • Lubrication with oils.

Knowing the characteristics, the types and the mechanical philosophy that underlies these is part of the ABC of a good mechanic and passionate cyclist. You can go through the Mongoose mountainbike.

What is it for?

Lubricating with grease is mainly used to protect bearings and balls subjected to rolling and friction, to protect them from water washout and dirt that cause premature wear.

Where it applies

Where there are bearings, then headsets, bottom brackets, wheel hubs. Furthermore, it is good practice to protect the threads with grease to avoid seizing.

Characteristics of bicycle greases

By lubricating grease, we mean a viscous substance (therefore not purely fluid), composed of a mineral or synthetic oil base, with specific additives for the applications for which the lubricant is intended. It follows from this that a “milieus” grease that is efficient in all conditions of use cannot exist. On the market, there are some that have a large range of applications, but if you want to keep your bike at its best, it is advisable to prefer special greases. The main characteristics of bicycle grease are:

  • Good viscosity to resist centrifugal forces;
  • Resistance to water washout and dirt;
  • Ability to activate at low operating temperatures

Additive: Component added to the oil/soap base mixture to give the grease certain characteristics

Dropping point: Temperature beyond which a grease becomes more fluid and begins to drip, losing its lubricating characteristics. Once the dropping point is reached, the fat is compromised even if it is allowed to cool.

Viscosity: Characteristic of the molecules of a material to move away from each other. The higher the viscosity of grease, the less fluid it appears.

The ability of the grease or lubricant to activate its characteristics in certain situations or temperatures

What grease to use?

The typical lubricating grease that you can find just a few euros from the hardware store or even in non-specialized stores. It is an emulsion of mineral oil and soap, usually with added calcium, sodium, or barium.

Lithium grease

It is a lithium-based lubricating grease, usually white in color. It is widely used in the nautical industry as it is anti-seize and very resistant to the washing action of water. It can be used on bearings in headsets, bottom brackets, and hubs. It can also be used for the installation of threaded components thanks to its anti-seize characteristic.

Copper grease

Copper grease is an excellent anti-seize agent that is used in the mechanical industry for tightening bolts and coupled joints that work at high temperatures. The bicycle products called “anti-seize” (i.e., anti-seize) are nothing more than specific lubricants based on copper grease. It can be put on the bottom bracket caps, on the seat post, on the pedal pins, and on all components that are coupled by threading (spreading a light film on both the screw and the nut screw). In this way, micro-welding of the threads is avoided, which causes them to seize.

Teflon grease

Polytetrafluoroethylene, called Teflon or PTFE, is a synthetic polymer characterized by high resistance to chemical aggression and a very low coefficient of friction. Added as an additive to the lubricating grease, it makes it suitable for all those applications that require smoothness, elimination of friction, attenuation of noise. It is an excellent grease for components of a bicycle that work by friction, such as bearings. Not to be used on threaded parts, as it would increase the smoothness of the threads and therefore the possibility of loosening.

To be avoided

The one pictured is an old but common automotive type grease. Car bearings work at much higher temperatures and rpm than a bicycle. Automotive greases, therefore, activate at too high temperatures and would remain “inert” on a bicycle.

Even silicone grease, despite its high resistance to washout, is too liquid to be used on a bicycle (you risk having leaks). It is also not suitable for bearings.

How to apply the grease

There are various methods. The one-time mechanic took his index finger, dipped it in the jar of grease, and then passed it over the fillets. It is an immortal method, but sometimes it is difficult to reach the most uncomfortable points, such as the hub tracks and you risk greasing a much more abundant part than that affected by maintenance. You can use a brush dipped in grease or special guns with a pointed beak. In this case, even the most uncomfortable points are reached very easily. You do not get dirty. You apply the grease only where it is needed and waste is limited.

Lubrication with oily lubricants: What it is for

To decrease the friction and, therefore the wear of the components that work by rubbing or rotation. It also serves to create a protective barrier against the atmospheric agents to which all these components are exposed.

Where does it apply?

Chain, front and rear derailleur, cassette and sprocket set, fork legs, brake pins at the fulcrum. Important, never grease the chain!

Characteristics of bicycle lubricants

A bicycle lubricant must be free of hydrocarbons and solvents that are aggressive to metals, have excellent resistance to dirt and water, resist centrifugal force, and be fluid enough to be able to penetrate into very small areas (such as chain rollers)

What lubricant to use?

A neophyte or a superficial mechanic might think that on the chain, it is enough to spray any lubricant with characteristics that guarantee fluidity of movements and protection from rust.

Generic

I’m talking about the very famous WD-40 or Svitol, a panacea for all squeaks. In reality, more than a lubricant, the WD40 has a cleaning action (for this reason, it descales the seized threads). In fact, the lubricant inside the spray is a small part, which evaporates and does not protect the chain. I do not recommend it, since it is always better to rely on products designed and studied for use on a bicycle. Absolutely not to be used on the fork legs, as it is composed of a percentage of hydrocarbons that could cause the oil seals to dry out. Only specific products must be used on the suspension forks.

Dry (or dry) lubricant

Let’s make a distinction: the division between dry and wet lubricant does not necessarily mean that the former should be used when it is sunny and the latter when it rains. This is a conception error, as the terms “dry” and “wet” indicate the composition of the lubricant. The former is, in fact, drier while the latter is more viscous. The dry lubricant has Teflon additives, allows a good sliding of the chain and does not make the dust stick to the metal (which would have an effect similar to sandpaper on the components). It has a fairly limited duration and resistance to water washout is low. In fact, it tends to evaporate in a short time and for this reason, it should be added after a certain number of kilometers. It is an excellent solution for short rides, where there is not too much mud or humidity.

Wet lubricant

Designed to be vicious and thick, wet lubricant works in a totally opposite way to dry lubricant. In this case, the lubricant is viscous, almost sticky (a characteristic due to the silicone additives), to remain “clinging” to the chain and ensure that the water does not wash it away quickly. It tends to knead the chain, as it can attract dust or dirt, but once it gets into the pins, it stays inside for a long time. It is an excellent solution for long rides, where you don’t have time to stop and re-lubricate (which you should do if you are using a dry lubricant).

Suspension lubricant

The suspension stems (both front and rear) of the Mtb must be lubricated so that they slide better inside the chainstays. In this case, my advice is to always use specific lubricants for this type of work. In fact, the lubricant must give smoothness to the stem, keep it clean so that dirt does not stick (which would seriously wear the stems, even scratching them), do not dry out the oil seals, and do not contaminate the oil of the suspension hydraulics when the stem goes into compression in the sheath. Using an unsuitable lubricant would lead to one of the problems mentioned above, with what follows (suspensions cost a lot). Another mistake to avoid is to lubricate without first cleaning the stems with alcohol and a cotton cloth.

How to apply the lubricant

Easy: I turn the chain at full throttle, spray a liter of lubricant and start again with the chain dripping oil. Of course, you can do it if you want to harm your bike.

Let’s start by saying that it is better to use the lubricant in a bottle rather than the spray one, since it is easier to lubricate in the right places, not to dirty the rest of the bike with the jet, use the necessary amount. It is also good for the environment.

First, you have to clean the transmission thoroughly with a detergent. If very dirty, it should be disassembled and washed with white petroleum. Then the chain is slowly turned and lubricated by dropping a small amount on each roller of the chain (i.e., on the pin that holds the links together). If you consider that the chain has more than one hundred rolls, you understand why I said that it is a “pugnacious” operation. After lubricating the chain, downshift all the ratios of the rear cassette and the front crankset so that the lubricant has a way to penetrate inside the rollers. Then take a rag in your hand, wrap it around the chain and spin it. This is done to remove excess lubricant. In fact, it is a common belief that “the more lubricant the better,” but this is a misconception. Excess lubricant will clog the transmission,

When lubricating the transmission, protect the disc brake rotor with a cloth or plastic bag. If some lubricant ends up on the rotor, it could then contaminate the pads, canceling the braking effect and very dangerous during use. You may also like to read Bike brakes quick and easy tips

Summer is here: 14 children’s health tips

children's health tips

Do you want to spend a quiet summer without frights or illnesses? Put these 14 tips into practice to protect your children and… enjoy the good weather!

Do Not Lower Your Guard

Best health tips

In summer there are also diseases. Viral colds, gastroenteritis, external otitis, laryngitis, conjunctivitis, insect bites, impetigo due to infected wounds, and athlete’s foot are the disorders that most affect health during the summer months.

Hygiene Against Gastroenteritis And Salmonellosis

“Gastroenteritis is very common in childhood. The most important preventive measures are extreme hygiene: hand washing is the most effective form of protection. In the case of salmonellosis, it is also advisable to wash the food correctly, properly cook it and refrigerate it, especially in the summer months”, comments Dr. María Jesús Pascual, head of the Pediatrics service at the Vithas Nisa Pardo Hospital. of Aravaca (Madrid).

Control Snacking And Monitor Your Diet

In summer, the diet should be as always: varied and balanced, with foods from all groups: fruits, vegetables, meat, fish, cereals, legumes, eggs, and dairy products. It is advisable to monitor the tendency to snack and consumes non-nutritious foods”, explains Dr. Pascual.

Give Them More Fluids

Should hydration be increased in summer? “Yes, due to the increase in ambient temperature. In addition, children spend more hours in the sun, perform more physical activity with sweat production and play a lot outdoors”, explains Dr. Antonio Redondo, a pediatrician at the Vithas Medimar International Hospital in Alicante.

Watch For Dehydration

As explained by Dr. Antonio Redondo, the warning symptoms that the child is dehydrated are pale skin and dark circles under the eyes due to the lack of fluid in the skin. At first, there is also irritability and if it progresses, decay. In babies who still have an open fontanelle, it sinks.

Protect Them Against Heat Stroke

As Dr. María Jesús Pascual points out, “ children under one year of age are the most sensitive to heatstroke. Keeping a child in a closed car, even for a short time, exposing himself to the sun in very hot hours, or doing intense exercise without adequate hydration are situations that favor heat stroke.

«In summer the diet should be as always: varied and balanced. It is advisable to monitor the tendency to snack and consumes non-nutritious foods”

Apply Sunscreen Well

Sunscreen should be applied before the child puts on a bathing suit and at least half an hour before sun exposure. The ideal is to spread the cream at home on all areas, without forgetting any (ears, hands, nose, neck…). It is important to extend it correctly (making circles) and renew it at least every two hours. The cream is not only used on sunny days but also on cloudy days.

Take Care Of The Skin In Case Of Burns

As recommended by Dr. Antonio Redondo, when a child suffers burns, the first thing is “to get him out of the sun, take care of the affected skin with an after-sun; and if he has blistering lesions, seek medical attention and offer fluids.”

Control Sun Exposure

Should children wear a shirt when they are on the beach? “No. Wearing clothing can give a false illusion of protection from ultraviolet rays. Light colors offer less sun protection. In very sunny places, and especially at noon and when there is a lot of sunshine, children should be completely avoided exposing themselves to the sun ”.

Alert Against Secondary Drowning

“When a child or an adult drowns in fresh or saltwater and responds well to cardiopulmonary resuscitation maneuvers, they remain apparently ‘normal’, but there is a period of between 1 and 72 hours in If the water has reached the alveoli of the lungs, lung function can be compromised and symptoms of ‘secondary drowning’ can occur: shortness of breath, intense coughing, extreme tiredness, and brain damage. For this reason, after drowning, the patient should be kept under observation in a hospital”, explains Dr. Antonio Redondo, a pediatrician at the Vithas Medimar International Hospital in Alicante.

Dry Your Ears Well

The basic precautions to avoid otitis from swimming pools that many children suffer from are, according to Dr. Antonio Redondo, “dry your ears well when you get out of the water with a towel and tilt your head to both sides to try to get out the water that has entered”. In addition, ” in susceptible children, bathing time should be reduced, earplugs and bathing caps should be used, and a few drops of a diluted alcohol solution can be put on when leaving the water.”

In The Water, Always Supervised

Drowning is the second most frequent cause of death in children under nine years of age, which is why children must always be supervised in the pool. Experts advise teaching them to swim early (from the age of four), but even so, you have to control them visually.

“Should children wear a shirt when they are on the beach? “No. Wearing clothing can give a false illusion of protection from ultraviolet rays.

Beware Of Diving

5% of spinal cord injuries occur when diving into a pool, lake, or sea. It usually happens especially among the adolescent population, so extreme care must be taken: always checking the bottom beforehand and not diving headfirst.

Always Wear Shoes In Wet Areas

Fungal infections in swimming pools are also very common in summer. The basic guideline to avoid them is to always wear shoes in wet areas and where water puddles, such as in showers. When you get out of the water, you have to insist on drying between your fingers. The fungus can also grow from keeping the swimsuit wet for a long time when you get out of the water.

You may also be interested in Banking Methods For Online Casinos

Banking methods for online casinos

Online casinos are a good source of entertainment. In addition to providing us with plenty of games and slots, they let us get free spins and play for big amounts every day. It should be noticed that all online casinos are not accessible in all countries. Some of them restrict people from the United States and China from playing, while others don’t welcome players from Pakistan, India, and other Asian countries. While selecting a casino website, you should check if it is available in your country or not. Also, you should see if it offers a variety of payment methods or not.

10 tips to overcome your fear of flying

overcome fear of flying

If you are afraid of flying, read on and take note. These 10 tips will help you overcome your fear of planes.

Authentic travelers of soul and thought see their desire to discover every corner of the world restricted by their fear of flying. The fear of flying or the fear of airplanes is fear like any other, something totally irrational that completely paralyzes us and deprives us of satisfying our great desire to discover other places and cultures other than our own. But, like any phobia derived from anxiety, there are tricks to overcome it.

Guide to studying in an aviation school

study in an aviation school

Flying an airplane requires extensive training that must be acquired in specialized centers

Being an airplane pilot is a career that can be exciting and attractive, as well as being one of the highest-paying jobs today. Taking to the skies and living in constant travel can fulfill the dreams of many young people who aspire to one day be part of an airline. But to achieve that dream, you will first have to be trained in an aviation school where the necessary skills are acquired.

COMMERCIAL PILOT SHORTAGE: THE OTHER SIDE OF THE CRISIS

commercial pilot shortage

Air traffic has seen a significant reduction in its operation as a result of the spread of the coronavirus and the measures adopted by most of the countries of the world, for which the sector has entered an evident crisis that has touched other spheres of life However, one of the perspectives little addressed is the shortage of commercial pilots that is looming in the face of this situation.

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