Are airplanes afraid of birds 40, are airplanes afraid of birds

Fear. There is a special term in the aviation industry called bird strike, which means that a bird hits an airplane. The vast majority of birds are small and lightweight, so the damage of bird strikes comes mainly from the speed of the aircraft rather than the mass of the bird itself.

According to the kinetic energy theorem, e = 1 2 mv2, where m is the mass of the bird in kilograms; v is the sum of the velocity vector of the bird and the aircraft, the unit is meter seconds, because the flight speed of the bird is very low, negligible, so it can be considered that the speed of the bird relative to the aircraft is the speed of the aircraft, and the low-altitude climb speed of the more typical aircraft is 150 knots to 250 knots, that is, 77 m s to 128 m s. At this time, if the aircraft collides with a kilogram bird, it will produce about 1500 4000 joules of energy, which will be absorbed by the aircraft in an instant, and the contact parts will be damaged to varying degrees. The high-speed motion of the aircraft makes the destructive power of bird strikes staggering.

The damage caused by bird strikes to the aircraft is closely related to the location of the impact, and the impact that causes serious damage is mostly concentrated in the navigation system and the power system. Bird strikes are mainly carried out during take-off and landing, and are concentrated in the windshield, engine, nose wing leading edge and other parts. Among them, the windshield and engine have the greatest probability, and these parts are the weakest and most important parts of the aircraft, so the consequences of being hit by birds are very serious.

Therefore, there are anti-bird measures at the airport, and nests near the airport are never allowed.

It's the same with racing cars, throwing a watermelon at a speeding car is the equivalent of shooting at a racing car.

I am afraid that if the plane hits a bird while flying, it will destroy the plane and kill people due to the great speed that produces a lot of kinetic energy.

I'm sure that the speed of the plane, if a bird hits it, can be fatal.

And that's why airplanes are flying above the troposphere. Wish.

Very afraid. This involves the momentum theorem of physics.

Of course, the plane will be destroyed and people will die.

A collision between an aircraft and a bird will pose a threat to the flight safety of both civil and military aircraft.

1. The plane is afraid of birds because the relative speed of the aircraft is large, and the force after colliding with the object is greater. If it exceeds the bearing capacity of a certain part of the aircraft, it may damage the body or parts of the aircraft, and in serious cases, it will directly threaten flight safety.

2. If the bird hits the windshield of the aircraft, it will directly affect the pilot's control of the aircraft, and even affect the pilot's life safety.

3. If the bird crashes the engine, it will cause the engine to stop in the air, and even cause the engine to catch fire in the air, until the entire aircraft is ignited.

The most feared thing about an airplane in the air is a carrier pigeon.

It's fine if it's an ordinary bird, after all, it's all flesh and blood, and even relatively hard bones are mainly made of calcium, and when they pass through the engine, they will be ground into pieces.

Pigeons are different because pigeons are domesticated and will have metal rings on their legs, usually aluminum, but of course plastic. Although the metal aluminum is not very hard, it is metal after all, and it is much stronger than bone, so it can cause damage to the aircraft.

Aircraft engine blades are made of composite materials and high-temperature alloys, the blades are relatively thin, and rotate at high speed, can reach 30,000 rpm, although the birds will be crushed after inhaling the birds, but will also lose most of the power, at this time can only rely on the remaining engines to return home. In the event of a ignition, the pilot immediately shuts down the engine, so the aluminium rings on the pigeon's legs are extremely damaging.

Related news reports

At an air show in Australia in 2019, a C-17A transport plane was taking off, and the No. 4 engine sucked in a large bird, and a fire flared up at random.

The pilot avoids an accident by urgently interrupting the take-off procedure and turning on the thrust reverser of the engine. The C17 uses a fence thrust reverser, which requires changing the direction of the engine jet flow from the inside, and spraying it through the side air flow refractor port to stop the aircraft as soon as possible.