readytorunbook Chapter 291 Technology that changed the world's aviation history!
Chapter 291 Technology that changed the world's aviation history!
I saw the Backfire bomber flying steadily into the air.
General Chen and Liu Yadong finally put their minds at ease.
But then, they looked at the bombers circling back and forth in the air and felt something was wrong.
Isn’t it said that this aircraft can reach a maximum speed of Mach 2.3?
But now it seems that this speed is not much faster than the passenger plane I am on...
But before they could ask the question.
He was immediately stunned by what happened in the air.
The wings of the Backfire bomber, which were originally tightly attached to the fuselage on the ground, slowly opened in full view of everyone.
Almost at the same time, a layer of pale white sound barrier suddenly appeared on the fuselage of the Backfire bomber.
"boom--"
And the next second.
All I heard was a huge sonic boom in the air.
The Backfire, which was originally flying slowly in the air, was increased to an extremely terrifying speed almost instantly.
Even the crowd watching from the ground could easily see the change in the speed of the backfire...
After breaking the sound barrier, Backfire's speed continued to rise.
In less than half a minute, it turned into a small black dot on the horizon and disappeared from everyone's sight...
……
It was not until now that General Chen and Liu Yadong clearly understood what the variable sweep wing technology Fang Yu was talking about was.
But, this thing is so cool!
Although in this era, General Chen and Liu Yadong still don’t know what “Transformers” are.
I don’t know how many people will remember the “kakaka” sound made by those robots when they are transformed in their dreams.
However, the mechanical movement of the Backfire's wings unfolding just now was enough to make these two people unforgettable...
Of course, besides watching the fun.
As the commander-in-chief of the Longguo Air Force, Liu Yadong could naturally see the ins and outs of it.
You know, the speed of an airplane when it is running is not the same as that on the ground.
It can easily be hundreds of kilometers per hour, or even thousands of kilometers per hour.
At this time, the air resistance, which is usually the most ignored, really shows its presence.
Early aircraft generally used straight wings, but as flight speeds increased, aircraft would disintegrate and crash during high-speed dives.
Later, scientists discovered that when the flight speed approaches the speed of sound, the aircraft will encounter enormous shock wave resistance.
At this point, the plane will either be unable to increase its speed or will be unable to withstand the huge impact force and will be smashed to pieces.
In order to overcome and reduce shock wave drag, people changed the straight wing shape and proposed a swept wing design.
This swept-wing design is also what the F86 and MiG-15 use at this time.
The aerodynamic characteristics of the swept wing can increase the critical Mach number of the wing, delay the arrival of the shock wave, and reduce the resistance during supersonic flight.
Therefore, the F86 and MiG-15 can fly at speeds close to the speed of sound.
However, swept wings can increase the aircraft's maximum speed when flying at high speeds.
But the shortcomings are also very obvious.
Although the swept wing has low air resistance, it has the disadvantage of insufficient lift at the leading edge of the wing, and the larger the sweep angle, the lower the lift coefficient.
This makes the aircraft's takeoff, landing, airspeed limit and other indicators not ideal.
In addition, in addition to the disadvantage of low leading edge lift, the swept wing also has a fatal flaw called "wingtip divergence" or "wingtip stall".
That is to say, a thin layer of airflow (terminologically called: boundary layer) formed on the surface of the aircraft wing due to the influence of air viscosity will flow from the wing root to the wing tip.
During high angle-of-attack maneuvers, the boundary layer at the wingtip will separate from the wing due to excessive flow, causing the aircraft to lose most of its lift.
The Backfire bomber designed by Fang Yu uses this variable swept-wing technology.
It can be said that this problem is solved perfectly.
After having this technology.
During takeoff and landing and low-speed flight, using a smaller sweep angle can increase the lift of the leading edge of the wing, improve wing efficiency, and thus shorten the takeoff and landing distance.
Using a large sweep angle during high-speed or even supersonic flight improves the aircraft's acceleration performance.
This design not only solves the contradiction in the aerodynamic layout of the aircraft between high and low speeds, but also allows the aircraft to quickly switch between high and low speeds for cruising, while shortening the take-off and landing distance, increasing the range and saving fuel.
It can be said that the "variable sweep wing" technology designed by Fang Yu solved the three most important and main problems on the aircraft at once.
It really achieves three goals in one go!
Thinking of this, Liu Yadong could even assert.
The "variable sweep wing" technology invented by Fang Yu is definitely one of the technologies that can change the aviation development ideas of all countries.
In any case, it will definitely leave a significant mark in the history of world aviation development!
With this thought in mind, Liu Yadong looked at Fang Yu who was standing beside him with a smile on his face.
I thought with great emotion.
You say we are all human beings, but what exactly are their brains like?
Not to mention the domestic experts, even the aviation experts in the United States would be so shocked that their hearts would be broken if they saw the "variable sweep wing" technology designed by the young man in front of them, right?
This Fang Yu is truly worthy of being favored by President Wu and the chief.
Almost single-handedly, he drove the development of Longguo's military industry.
No wonder even Mr. Wu calls him a peerless talent in the country.
He really deserves this title...
"Lao Liu? Lao Liu, what are you thinking? I called you so many times but you didn't respond?"
And, just when Liu Yadong fell into a trance.
General Chen's voice sounded beside him, waking him up.
"No, nothing... I'm just so happy to see our bomber's test flight succeed..."
Hearing this, Liu Yadong laughed and touched the corners of his eyes, where tears welled up due to excessive excitement.
"Haha, you, you, what can I say about you?"
"Are you happy already? Have you forgotten that this guy didn't ask us to come here just to watch the plane test flight?"
Hearing this, General Chen burst into laughter, then immediately turned his head and looked at Fang Yu and asked.
"Fang Yu, didn't you say you wanted to demonstrate to us the power of your latest researched aerial bomb?"
"When will this live-fire experiment begin?"