The engine is broken? When most people listen to it, they feel like it's an absolutely killer beat. Aren't the engines the two long legs of the plane? If one of them is broken, how can we fix it? Do you want to jump?
How to say it? It is understandable that ordinary people would think so. If you can think about it, then as aircraft designers, they must be able to think about it too.
After all, when something happens to an airplane, especially a passenger airplane, it is not the problem of one or two people, but the problem of a group of people.
So if your plane collides with a single-engine plane, don't even think about it. It depends on how lucky God has given us. There is a high probability that it will be destroyed. .
Of course, single-engine aircraft are generally combat aircraft, and they are light fighters. Those equipped with twin engines areheavy combat aircraft, and civil aviation aircraft are at least twin-engined. .
Thus, a fighter plane has only one engine. Once a problem occurs and the engine is stopped, in most cases we can simply eject it. If the plane doesn't fly, there will be no rescue.
When it comes to multi-engine engines, once an engine stops and something goes wrong, there is always a high probability that it could be pushed back with a single engine.
The designer has made adequate preparations to resolve this issue.
Let’s explain.Let's put it this way, there are no more problems with an airplane engine than in two places, one in the sky and the other when taking off from land.
Let's first clearly explain the engine problems that occur when an airplane takes off on land, and you will understand them in the sky.
First of all, everyone understands one thing: for aplane takes off, it must have sufficient speed. If it doesn't reach that speed, it's just a bus with wings and it can't fly. at all.
So during the takeoff process the speed continues to increase, so we divide this increasing speed into two stages.
Why is it divided into two stages?
Because when the speed of the plane reaches A, or even exceeds A, don't think about it. The plane can't brake, it's too fast and the runway is too short, which isn't good enough. helping you turn the plane, stop, brake suddenly, go off the runway and hit something, that would certainly be a catastrophic outcome.
When the speed of our plane does not reach zone A, the pilot will look at the instrument panel from time to time, which will indicate whether there is a problem with the engine. , then at this point the brakes will become Yes, there is nothing wrong with that.
When your speed has exceeded A, even if one of the motors turns out to have stopped working, do not think about it. Take off to face your destiny, try to reach takeoff speed B, and let our plane fly!
What if you took the plane? Does it spin around and fall? Yes, empty the fuel tank and get off, or choose another nearby airport to land.
In 2016, the engine of a Boeing 777 caught fire while it was taking off. They chose to take off and then land after takeoff.
So the question is: aThe engine was already working poorly, so he still dared to change course?
This is actually a contingency plan that was in place early in the aircraft's design.
There is an auxiliary power unit behind the butt of a civil aviation aircraft. Most people call it APU. It's actually a generator plus a motor. When enabled, it provides. a certain amount of power to supporte the cabin.
Once a motor stops working, this system starts, allowing the remaining motors to do their job without worrying about anything else.
Then the remaining engines and this system work together to complete the flight for a certain period of time.
This is a necessary condition for any aircraft to be sold. For example, an airplane like the 737 must maintain a flight time of 1 hour, while an airplane like the 777 must maintain a flight time of 1 hour. two o'clock. Some can go up to three hours.
So there is such a large margin, enough for the plane to find a suitable place to land.
First of all, there are two types of alternating and direct current in airplanes.
There are four sources of AC power: the engine, the APU, the external ground power supply, and the static inverter. There are three sources of DC power: batteries, bat chargersrie and rectifier transformers. Typically this is 115 volts three-phase alternating current and 28 volts direct current. The static inverter converts 28 volt direct current into 115 volt single-phase alternating current. The rectifier transformer converts 115 AC into 28 V DC. There are also components on the aircraft that can convert electrical power to other voltages for use by the corresponding equipment. For example, some light bulbs operate on 5 volts AC.
In addition, some aircraft are equipped with pneumatic generators (ADG). If the plane crashes and the power goes out, airflow during flight will spin a fan to generate electricity.
Airplanes are usually powered by engines or APUs in flight. There are flight altitude restrictions for powering the APU. When you reach a certain altitude, power to the APU cannot becannot be used. When the aircraft stops on the ground for a short time, the APU is generally used for power supply. When the aircraft stays for a long time or before and after the flight, the ground power supply is used for power supply.
In addition, some emergency lighting equipment on board aircraft is powered by its own batteries.