How does a passenger plane take off, and does it use a parachute?

An airplane flies by providing sufficient pulling force from the engine (commonly known as the engine) and the fixed wings on the aircraft (commonly known as the aircraft wings) to generate lift (also known as lifting force); It's not with an umbrella!

1. The lift of the aircraft.

The upper surface of the wing of the aircraft is arched, and the lower surface is flat. When the same air passes through the upper and lower surfaces of the wing, different velocities are formed above and below the wing. As the air passes through the upper surface of the wing, the velocity is high, so the pressure is low.

The flow velocity is small when passing through the lower surface, so the pressure is relatively large. At this time, the aircraft will form an overall upward resultant force, which is the lift of the aircraft. Because of the presence of lift, the aircraft can leave the ground and fly in the air.

Second, the pull of the aircraft.

The gravity of an aircraft is affected by the weight of the aircraft itself and the fuel it carries, in the opposite direction of lift. The magnitude of the aircraft's pulling force is determined by the power of the engine, and the pulling force will cause the aircraft to fly forward in the air. In general, the more powerful the engine, the greater the pulling force generated, and the faster the aircraft will fly.

Airplanes experience air resistance when they fly in the air.

This drag force is in the opposite direction to the pull force and limits the speed of the aircraft.

3. Take-off of the aircraft.

The airplane takes off by relative motion to the air.

Lift is generated, and the magnitude of the lift depends on the relative velocity of the aircraft with the air.

If taking off in a headwind situation, the speed of the aircraft is opposite to the wind speed. The relative velocity of the aircraft to the velocity is equal to the sum of the two, and the aircraft only needs a small velocity to get the corresponding lift. As a result, the distance required for take-off against the wind will be shorter than in windless conditions.

In the process of gradual landing, the plane must continue to slow down while maintaining enough lift to make the plane fall smoothly.

How does a passenger plane take off? With an umbrella?

Nothing is pulled by an umbrella. And who pulls the umbrella?

The take-off of the aircraft depends on the combined action of the aircraft's own engines and wings.

After the engine starts, a huge rear jet flow generates a strong thrust that makes the aircraft slide forward; The different velocities of the airflow up and down the wings (fast up and slow down) cause the wings to generate upward lift. The faster the aircraft moves forward, the greater the lift.

When the lift force is greater than the gravity of the aircraft, the aircraft is lifted up, that is, lifted off the ground and flies.

During take-off, the plane needs to taxi to the end of the runway, hold down the brakes, push the throttle to the maximum, release the brakes, and the plane will start taxiing. Summary 1The plane flies into the sky with the wings on both sides.

2.The only shortcut to aircraft power is the aero engine, which is also the heart of the aircraft.

There is no parachute on the plane.

First, in the air the aircraft is supercharged, in the case of the Boeing 737 aircraft. When the aircraft is flying at an altitude of more than 10,000 meters, the air pressure in the cabin is about equivalent to an altitude of more than 2,000 meters. At this time, the pressure difference between the inside and outside of the cabin is about pounds per square inch, which is about 55,000 pascals.

In other words, the door of the aircraft will be pressed by a pressure of about 10 tons. Under normal circumstances, it is naturally impossible to open, and even if it is opened, the ultra-low pressure, low oxygen, and low temperature environment of the outside world are not something that the human body can bear. In the event of a malfunction, the pilot quickly lowers altitude and releases cabin pressure.

Second, skydiving is very difficult. This time in Sichuan, it was already difficult and dangerous for the Airborne Forces to parachute from a height of 4999. For untrained passengers, the probability of being able to jump intact is no more than one in 100.

Third, it is more conducive to ensuring the safety of passenger aircraft in other ways.

Sometimes there are life jackets and lifeboats on the plane, but if you don't fly on the water, there are usually no life jackets or they don't have them. The airline will state this in the emergency manual. "The seat cushion of the seat can be removed as a floater.

Why are airliners not equipped with parachutes?

There is no parachute on the passenger plane, and whether the passenger plane should be equipped with a parachute has always been the focus of debate in the outside world, but according to some aviation experts, there is really no need to have a parachute on the passenger plane, and the main reasons for this are as follows

One is that skydiving has a certain degree of danger, not everyone will learn something, parachutists and airborne troops in the army must have professional parachute training, in case of improper operation will also cause **.

Second, parachuting can not be carried out at any altitude, the general movement of parachuting will be controlled at an altitude of 8,000 meters or less, and the flight altitude of modern civil airliners is more than 10,000 meters, so that the altitude is not only as low as minus 50 degrees, but also the oxygen is very thin. At such altitudes, once a person jumps out of the airliner, there is a risk of freezing and suffocation.

Third, not all planes are suitable for parachuting, and the Air Force's transport planes generally have a large exit at the tail of the plane, so that soldiers can quickly jump out of the plane along this exit. If you want to parachute in a passenger plane, not only the speed of passenger evacuation is slow, but also modern passenger aircraft are generally jets, if passengers choose to parachute at the exit of the nose, then they may be sucked into the engine of the aircraft when they jump out.

Therefore, modern civil airliners are generally not equipped with parachutes, but will be equipped with multiple emergency exits on the aircraft, and equipped with safety equipment such as life jackets and inflatable slides, so that the aircraft can escape the aircraft in the fastest time when the aircraft is forced to land and sea.

No. Here's why:

1. This is because if each passenger is equipped with a parachute, it will greatly increase the weight of the aircraft, and it will take up a lot of space, which will greatly affect the operational capacity of the aircraft;

2. Not everyone of the passengers can master the skydiving technique;

3. The aircraft is flying at high altitude and high speed, which is different from the general parachuting and low-altitude disembarkation, even if an accident occurs, the cabin door cannot be opened to parachute.

Nowadays, the performance of civil aircraft is becoming more and more advanced, and the safety factor is extremely high. According to statistics, the safety factor of civil aircraft is greater than that of all other public transportation, so guests who have taken a guest do not have to worry about accidents during flight.

You can bring it, but it cannot exceed 5 kg.

Things you can't bring on a plane:

Deterrent Equipment:

It is well known that firearms, military or police equipment and controlled knives cannot be checked in or carried, but are confiscated.

Flammable and explosive materials:

Lighters, firecrackers, fireworks, alcohol and other flammable and explosive items are obviously neither allowed nor checked in.

Other prohibited items expressly stipulated by the state:

In addition to the above-mentioned items, prohibited and restricted items and dangerous goods stipulated by the state and airlines cannot be carried or checked in baggage.

Tea and drinks: Tea and drinks cannot be carried on board, and all the liquid in the cup must be poured out when entering the security check.

Tips: Of course, a small amount of alcohol cannot be carried on the plane, so it can only be checked in.

Fruit knives: Fruit knives with a blade of no more than 6cm can only be checked in baggage and cannot be carried on board.

Mobile phone batteries: Mobile phone batteries can only be carried in a mobile phone and cannot be checked in baggage.

Cosmetics: The requirements for cosmetics are also strange for women, and it is recommended to put cosmetics in checked baggage for cosmetics with a capacity of more than 100ml.

Radios and radios can't be put in checked baggage, and I once saw a friend checked his luggage being asked to take it out by security.

Well, in fact, you don't have to worry about the bad environment at high altitude is not conducive to parachuting and the like, the design of modern airliners is all doors open inward, the door is larger than the door frame, you have absolutely no strength to open when flying in the air, it is possible to reach the outside of the plane when the shell is broken and depressurized rapidly, and then decide whether to jump or not to parachute in that small probability situation. There is also the safety design of large passenger aircraft is qualified, even if the power is lost, or the hydraulic system is completely failed, that is, the aircraft has broken a big hole at high altitude, and then even the fuel is not enough to safely taxi more than 100 kilometers and land safely, even if there is an accident, the real probability of survival in most cases is still very high, or don't worry about it late, don't store any umbrella.

Airplanes fly higher in the stratosphere than fighter jets,,, what concept of the stratosphere do you know? Even if you bring it, you will die if you jump down,,, high altitude low pressure, low temperature, not to mention that you will not jump,,, even if the danger occurs during take-off and landing,,, you have no chance,,, anyway, aviation accidents are very low than car accidents,,, there is a joke,,, you bring bombs, reduce the probability.

It's useless if you bring it, you can't parachute, even if you can jump, it's useless, open the hatch when flying at high altitude and you will freeze to death, there is no chance of parachuting and escaping.

Isn't it, brother, you still have to bring a parachute, you think the plane is so easy to crash, even if you take it and jump down, you will die, but it is 0 degrees and dozens of degrees outside.

Even if you bring it, you can't use it, because airliners are pressurized cabins, and if you skydive, you will get decompression sickness or even death from a ruptured skull due to a drastic change in pressure.

You can definitely bring it, but whether it is useful or not depends on your own creation.

Passenger planes do not have parachutes because:

1. Under today's conditions, no matter how developed the aviation is, the country cannot solve this technical problem. The air pressure in the cabin of the civil aviation large jet airliner is different from the air pressure outside the cabin, once the cabin door is closed, it must wait until the landing to open it, or open it again in a sudden emergency, the rest of the time can not be opened, in the air of up to 10,000 meters, the air pressure outside the aircraft and the air pressure of the cabin is huge, if the door is opened, the air pressure in the cabin and the air pressure outside the cabin are too large, so that even if there is a parachute, it will be all over.

2. Because the civil aviation aircraft in the event of an emergency, the use of a parachute not only reduces the survival rate (this is because, the use of the parachute requires training, and the average person from a height of 1500 meters with a parachute will also fall or control the difficulty and so on), the most important thing is that the turbine blade rotation of the aircraft engine will cause a lot of force, and it is easy for people to open the door and jump out of the engine to suck in, but once sucked in, the machine will be destroyed and killed.

3 The airliner flew in the stratosphere with extremely strong winds and extremely low temperatures.

Even if you skydive, you can't control it after the parachute is propped up. The chances of survival are very low.

Why are airliners not equipped with parachutes?

In recent years, accidents related to airplanes are also common, speaking of which, many friends will ask, since the probability of surviving an air crash is so low, why is the plane not equipped with a parachute?