early morning!
Zhou Yang was woken up early by the staff of the project department, because not only did they have to arrive at the military's secret experimental base today, but they also had very important tasks to deal with, so the departure time of the plane was set at 7 o'clock in the morning. bell.
In order not to delay the takeoff of the plane, all the staff got up early. After eating, they were escorted by military vehicles and went straight to the military airport in the suburbs.
On the way, Zhou Yang felt very anxious.
He knew very well what was going to happen next. If the normal historical trajectory was followed, today, except for him, Zheng Aiguo, and Liu Yunlong, all the remaining people on the bus would die for the country.
And the reason why he insisted on coming was because he wanted to save the lives of these people.
It’s just that Zhou Yang is not sure whether he can convince Nie Nansun and others to ground the plane or change the plane.
If they listened to his own advice, that would be fine, but what would he do if they didn't?
For a moment, Zhou Yang frowned, his expression a little serious.
Zheng Aiguo was a little confused when he saw Zhou Yang like this, and couldn't help but ask: "Who provoked you so early in the morning?"
"What?"
Zhou Yang was confused by Zheng Aiguo's words!
"I asked you why you were drooping your face. People who don't know would think someone provoked you?" Zheng Aiguo said with a smile.
"No, I just didn't sleep well last night and my head is a little dizzy now!"
"Stay up late?"
"No, I'm a little insomniac!"
"I didn't sleep well either. We are used to sleeping on earthen beds, but we are really not used to sleeping on that kind of soft bed!" Zheng Aiguo said with deep sympathy.
"I don't know, I just can't sleep..."
During the chat, the bus soon drove into the military airport in the suburbs.
When everyone got off the bus, they saw a medium-sized passenger plane parked at the airport.
When he saw this plane, Zhou Yang couldn't help but tremble in his heart.
In front of him was an Il-14M passenger plane, and Nie Nansun and others were flying in this type of plane when they were killed. As expected, it was the one in front of them.
The IL-14 aircraft is a piston twin-engine transport aircraft improved by the Maoxiong Ilyushin Design Bureau on the basis of the IL-12 transport aircraft. The first test flight was on July 15, 1950, and it was put into use on the Mao Xiong civil aviation route at the end of 1954.
The Il-14M is an extended version of the Il-14. Its passenger capacity is twice that of the Il-14, at 36.
In the late 1950s, we imported a large number of aircraft of this type from Mao Xiong to replace the old transport aircraft at that time.
At that time, the domestic transport aircraft were old and of various types, including 28 American C-46 transport aircraft and 3 C-47 aircraft, which will soon be scrapped. Several IL-12 and Li-2 aircraft will also be scrapped.
In order to maintain the scale of the transportation force of a transport division and a transport group at that time, there was an urgent need to order a batch of transport aircraft from abroad. After inspection, it was believed that the IL-14 aircraft was very suitable for us in terms of performance and price.
Ever since, our country imported 55 IL-14 aircraft from 1956 to 1960, including passenger aircraft and cargo aircraft. The one in front of us is obviously a passenger aircraft.
Due to time constraints, Nie Nansun immediately ordered everyone to board the plane immediately after everyone got off the plane, and the crew was ready to take off.
However, just as everyone was busy preparing to board the plane, Zhou Yang unexpectedly walked around to the back of the plane and observed the plane carefully.
Although Nie Nansun and others saw this scene, they didn't say much. They thought Zhou Yang had never seen this kind of aircraft before and became curious. This kind of thing is really normal for a researcher.
However, they didn't know that Zhou Yang didn't do this out of curiosity.
It's just an IL-14 transport aircraft. Zhou Yang really doesn't like this thing. Whether it's the domestic C919 or Y-20, Zhou Yang has seen it all. He even participated in the design of the radar part. How can he like this kind of thing? An antique from twenty years ago.
He was just looking for evidence to convince Nie Nansun and others. After all, if he wanted to ground the plane, it was useless to just rely on words. He had to produce convincing evidence.
And the evidence he wanted was on the surface of the plane, especially the wings and tail.
Because it was a targeted observation, Zhou Yang soon discovered the problem. He found a thin layer of frost under the wings of the aircraft.
In fact, it's not just the wings, the entire fuselage is full of snow-white ice crystal particles, as if a layer of shiny paint is applied to the surface of the fuselage, which is quite beautiful.
This discovery made Zhou Yang feel chilled and excited at the same time. The chilling part was that the plane really had ice on its wings, but the excitement was that with these discoveries, he had a reason to prevent the plane from taking off.
And just as Zhou Yang's thoughts were racing, Nie Nansun's voice suddenly came from the plane: "Hurry up and board the plane, the plane is about to take off!"
Hearing the sound, Zhou Yang immediately walked to the plane door and said to Nie Nansun at the door: "Mr. Nie, this plane cannot take off!"
Nie Nansun was stunned for a moment and asked hurriedly: "What's wrong?"
He also knew Zhou Yang's character and temper quite well, and knew that he was not the kind of person who would just look for trouble. There must be a reason for saying this.
"The wings of the plane are frozen!"
Upon hearing this reason, Nie Nansun's expression changed drastically.
Ice formation on an aircraft wing is not a trivial matter. Ice formation will cause the streamlined body of the lifting surface to deform into a non-streamlined shape, causing vortex separation.
And the ice on the leading edge of the wing will significantly affect the original aerodynamic performance, causing a significant reduction in lift, a significant increase in drag, and nonlinear changes in torque.
In addition, icing also particularly affects the stall characteristics of the aircraft. The stall angle of attack of the aircraft with ice is advanced, and the maximum lift coefficient also suffers a large loss. This causes the red line of flight to be greatly lowered. If you are not careful, it will Cause serious consequences of aircraft crash and human death.
Thinking of this, Nie Nansun did not dare to neglect and quickly got off the plane.
"Where?"
Zhou Yang didn't say anything and took him directly to the wing of the plane.
Nie Nansun took a closer look and found that the ice crystal particles on the wings were obvious, more like a layer of frost.
"It should just be a layer of floating frost, it shouldn't be too big!"
It is almost late November now, and the local temperature at night is below minus 20 degrees Celsius.
In addition, it is still early in the morning, so it is normal for the surface of the plane to be covered with frost.
Zhou Yang heard Nie Nansun's disapproving words and immediately said: "Look at the flat tail area again!"
Later, Nie Nansun came to the rear of the plane.
Compared with the wings, the icing on the flat tail was more obvious, which made Nie Nansun couldn't help but frown.
He knows very well that when the flat tail freezes, its impact on the handling characteristics will be greater.
Because the aircraft's horizontal tail is a negative-lift airfoil, during flight, it provides the aircraft with a nose-up moment to balance the nose-down moment generated by the main wing.
Because the chord length of the flat tail airfoil is smaller and the radius of the head is smaller, the ice accumulated on it is larger than that on the main wing.
When the ice-carrying horizontal tail operates at a negative angle of attack, a large flow separation will occur on its lower surface, affecting the trimming ability of the aircraft.
Seeing that Nie Nansun's expression finally changed, Zhou Yang immediately said: "There is obvious ice on the wings and tail of this aircraft. I have reason to suspect that its de-icing system has malfunctioned, so I think this aircraft The plane is not suitable for takeoff now!"
Nie Nansun hesitated for a moment!
He understood what Zhou Yang meant. The impact of icing on aircraft flight should not be underestimated. There were too many examples of aircraft crashing due to icing abroad.
Special aircraft icing tests have been conducted abroad. The results showed that icing increased flight resistance by 81%, and the pilot felt that the entire aircraft was about to lose control.
But if this plane cannot take off, then they may not be able to get to the northwest today. After all, planes are in extremely short supply these days.
They applied for this IL-14 in advance a few days ago. Where can they suddenly change planes?
Zhou Yang saw his hesitation and immediately said: "Mr. Nie, the people on our plane are all top scientific researchers. Once an accident occurs, the impact will be too great!"
Hearing this, Nie Nansun's expression changed again, and he immediately said: "You are right, the plane has suspended takeoff, and I will find a way to bring another fighter plane over!"
"OK!"
.......
(IL 14)
(Il 14M)
PS: Please ask "Power for Love", it is now ranked 15th!
