The first flight of C919 is imminent, but it encounters doubts about engine reversal, what is the situation?
C919 is China's first self-produced aircraft, even if it is not a domestically produced controllable material, but it symbolizes a milestone in China's scientific and technological development, making many people proud and proud.
At present, the C919 is preparing for its first commercial flight, but in the first test flight to Hefei, there is a suspected problem of engine thrust reversalWhat's going on?
According to reports, on February 1, 2023, China Eastern Airlines' C919 domestic large aircraft made its first test flight, which was originally scheduled to take off from Shanghai Hongqiao Airport from 9:45 to 12:10 and land at Capital Airport, and from Capital Airport to Hefei Airport from 13:45 to 15:50.
But after landing at the Capital Airport, the flight had to be canceled due to a failure of the turbine engine on the left side, and then returned directly to Shanghai Hongqiao Airport from the Capital Airport.
Regarding the question about the failure of the turbo engine on the left side, no official answer was given, so this statement is still only a possibility.
However, the topic is still hotly debated, so let's talk about the model and effect of the C919 twin-turbo engine, as well as the impact of turbine engine failure.
First of all, according to the previous official ** report on the C919, this large passenger aircraft uses CFM's two new LEAP-1C engines, which are its third-generation turbine engines, and the C919 is also the first large passenger aircraft on the market to use this engine.
Allegedly, the LEAP-1C engine is slightly inferior in overall performance compared to the LEAP-1A and LEAP-1B engines, but there is no real conceptual comparison.
However, these are all talking points in the industry, and I still remain skeptical about Xiaobai's technical advice, and don't follow what I don't understand!
Secondly, What is turbine engine thrust reverser?For example, everyone has a blower fan, and the fan blades are regularly curved, and the normal use is positive windward.
Assuming that the normal use is clockwise, the counterclockwise wind will be in the opposite direction, and the wind in both the positive and negative directions will have thrust, then the counterclockwise thrust will cause the aircraft to appear on the ground"Inverted"effect, this is the anti-thrust function of the turbine engine.
However, the reverse thrust is not necessarily required, in essence, the role of the reverse thrust is two, one is to effectively adjust the direction and position before takeoff, which can be achieved to a certain extent through the reverse thrust, but it is generally not adjusted in this way.
Second, in the air and when landing, the anti-thrust can achieve the effect of deceleration, which can effectively shorten the taxiing distance of the aircraft after landing on the ground, which is the main role of the anti-thrust.
Of course, many aircraft do not have thrust reverser capability in nature, and in the face of the abnormal situation that the aircraft does not have thrust reverser function or thrust reverser fails, as long as the runway of the aircraft is long enough, it can still achieve an effective and safe landing without relying on thrust reverser capability.
The most frustrating thing is"When both thrust reversers fail, the probability of a safe landing is zero"Statement, this absolutely is"Nonsense", no one who knows a little about aerodynamics will say that!
In that case, why did flights from Capital Airport to Shanghai Hongqiao Airport land safely?From this it follows that we should not believe in this logic, nor rule it out"Special Characters"The possibility of deliberately discrediting us!
In a word. After all, the C919 is China's first self-produced large passenger aircraft, and it is normal for there to be imperfections that need to be optimized and strengthened, especially if it is caused by CFM's LEAP-1C engine.
It can be seen from this that the significance of test flights lies in the possibility of eliminating defects and malfunctions, so-called"Failure is the mother of success"Finding the problem is the way to solve the problem, along with the country"Life comes first"The promotion of the concept, the sense of responsibility and the awareness of safety must strive to be complete.
So, what do you think of C919 at the moment?For"Unable to land safely"What do you think?Please leave a message in the comment section!