Airplane tires
Aircraft wheel tires These small but powerful tires
The tires on the wheels of the Boeing 777 can withstand about 227 tons of weight during landing and takeoff. Have you ever wondered why the wheels of an airplane with this weight and dimensions do not explode when landing at a speed equivalent to 270 km/h?
Airplane tires
Although the material used in the structure of airplane tires is almost similar to the materials in car tires, it is the high air pressure in the tires that protects them from damage during landing.
In this way, each of these wheels is inflated to about 200 pounds per square inch, which is equivalent to 6 times the air in the tires of cars.
Of course, everything is not limited to the air pressure in the tires of airplane wheels, and there are differences in the manufacturing process of these tires.
For example, the material used to make airplane tires is stronger than the tires of a passenger car, which, of course, in addition to increasing the resistance of tires against impact, also causes the tires to inflate at high pressure.
Interestingly, the tires of the airplane wheels are not so big and compared to the wheel of a trailer, which has a diameter equal to one meter and a width of 50 centimeters, they are considered a very small wheel.
Boeing 737 airplane tires are only 69 cm in diameter and 20 cm wide, yet due to the presence of aramid (a type of synthetic polymer) used in the tire structure, they are much stronger than an 18-wheel tire.
It is interesting to know that the most powerful wheels are able to withstand the pressures of landing at a speed of 463 km/h.
This is despite the fact that according to the rules developed by the aviation industry, an airplane wheel is close to the standard criteria when it can withstand a pressure equivalent to four times the rated pressure for only 3 seconds.
The pattern of the tire treads of the airplane wheels are also designed to prevent the airplanes from skidding when landing on the runway.
These treads include reinforcing cables that allow the tires to stretch on the runway surface during landing, which is also the cause of the smoke that is often seen during landing.
In most of the accidents that occur in the early stages of landing, the wheels are stretched on the surface of the runway but do not rotate, and the same thing causes the tires to tear and accidents occur. It can be used and after that for a longer life (up to about 7 times the initial life), it should be repaired and modified. It is interesting to know that most large airplanes such as the Airbus A380 have more than 20 tires to ensure complete stability for a safe landing. Have.
Aircraft tire structure
Unlike automobile tires, there are no weak and low-quality tire brands in the airplane tire market, and the cheapest tire brands also have to pass strict tests due to the sensitivity and safety of the aviation industry. Airplane wheels have to withstand and survive the harsh conditions of flight. bearing the weight of the aircraft on the ground, bearing the temperature up to 150 degrees Celsius during landing and takeoff, bearing heavy shocks during landing, bearing the temperature of minus 40 degrees during cruise flight at high altitude, bearing the excruciating pressure under the weight of the aircraft during braking Landing and such things are the basic requirements that must be considered in the process of making tires for airplane wheels.
It is not bad to know that the tires of airplane wheels are filled with nitrogen gas, the pressure of inflating tires in airplanes is up to 150~250 pounds per square inch (compared to car tires with 30 pounds per square inch). Inflating airplane tires with normal air causes The oxygen present in it reacts with the tire and its decay becomes faster. Also, in case of emergency braking and airplane tire catching fire, the presence of neutral nitrogen gas prevents the spread of fire.
After being worn out, the tires of airplane wheels can be grooved and reused several times. In soft landings, the airplane tires can last up to 500 landings and takeoffs before replacement. Above the runway, after deflating the air and shredding it, the tire remains around the rim. It also prevents it from disintegrating and parts hitting the aircraft body, engines and flaps and prevents accidents.
The secret of the Airbus square tire when landing
The Airbus A380 took off from Hong Kong airport on May 5 with 22 tires intact, but one of its wheels had turned square when it landed at London airport.
A British Airways Airbus A380 plane landed in London with a “square wheel” which was a very strange incident. Now the question is, why and how did this happen? After the release of pictures related to a square egg and a square watermelon, now it is the turn of a square tire of an airplane. This great mystery can be next to the great flight mysteries such as the Bermuda Triangle and the disappearance Amelia Earhart pointed out. Amelia Earhart was the pioneer American pilot and the first woman to fly solo across the Atlantic Ocean. He also managed to receive the Distinguished Flying Cross. Earhart, however, disappeared during a flight over the Pacific Ocean near Howland Island. Despite extensive searches, no trace of Amelia Earhart and Fred Noonan, her co-pilot, or even their twin-engine plane was found. did not come.