Chapter 670: Run off

The silver-white fighter plane stands on the runway. Its chic appearance makes people seem to have a desire to conquer it.
The landing gear of the small three-point is different from the previous fighters in Han. At this time, carrying his flying helmet, Chen Ruixing walked towards the fighter vigorously.
It is now in the test flight stage, so the fighter plane is not painted, it is still the original aluminum alloy skin, but the rivets are no longer visible.
The technology of the 1132 factory is constantly innovating. The latest countersunk rivets are used, and the hemispherical round heads of the rivets are no longer visible. This way, in addition to looking good, it can also reduce air resistance.
That's right, it is to reduce the air resistance. Such a small amount of resistance must also be reduced.
Chen Rui climbed up the gangway and sat in the cockpit. Not far away, a large group of people were watching,
As the chief engineer of the project, Song Lao's eyes were full of expectation.
Closing the canopy, Chen Rui began to skillfully flip the switches.
With the help of the ground power vehicle, the characteristic whistle of the turbo engine came from the rear. Chen Rui looked at the instrument in front of him and said: "The ghost report, the instrument is displayed normally, request a mid-speed taxi test."
When the fighter plane is taxiing, it is first at low speed. It was done yesterday, and today is at medium speed. If it goes well today, it can enter the high speed taxiing stage tomorrow.
Since Ying Nation came back, Chen Rui's nickname ghost has spread.
In the radio calls of the Han National Air Force, there are very few calls with nicknames. They are all directly called numbers. In order to strengthen the number, the pilots of Han Nationality have forgotten their names almost from the day they entered the army. Whether it’s training, eating, sports, etc., they call each other numbers.
And Chen Rui finally made a special one to use his nickname, and at the same time, he was very satisfied with this nickname.
There was an echo from the radio: "The experiment begins, pay attention to the direction."
"Understood." Chen Rui replied, releasing the brake.
Although the tail engine is only running at low speed and can already output enough power, Chen Rui uses the corner of his eye to focus on the instrument below, while his eyes are mainly outside.
The pilot’s cockpit has a poor vision and is blocked a lot by the fuselage. Judging from both sides is often easier than judging from the middle.
The speed quickly reached 60 kilometers per hour, which was the lowest speed for medium-speed gliding. From 60 to 100, the medium-speed gliding was successful.
At this moment, suddenly, Chen Rui felt something was wrong.
"Report, the fighter is shifting to the right!"
Following Chen Rui's words, the people below also saw that the fighter was facing the centerline of the runway when it started to roll, but now, as the roll progressed, one could find that the fighter was running to the right inexplicably!
"Stop taxiing!" Old Song said.
Old Song's brows frowned, and a large group of people watched the Raptors stop and rush towards that side.
The test flight hasn't officially started, just a taxi, and the problem has already emerged.
The medium-speed taxiing experiment mainly depends on the aircraft's correction ability.
Simply put, it is to put the aircraft on the runway and taxi forward only by the thrust of the engine. If the plane leans to one side and cannot walk in a straight line, it means that there is a problem with the plane.
There are many factors that cause deviation. It may be that the asymmetrical shape of the aircraft leads to asymmetrical aerodynamic forces; it may also be that the landing gear has problems-including the installation position of the landing gear and brakes, which may cause the aircraft to deviate.
Now, this aircraft is imitated. It is said that the prototype has solved this problem, but now, this situation still occurs. What caused it?
Song Lao also slid, and when he ran to the plane, Chen Rui had turned off the plane's engine and was waiting for the ground crew to move the ladder down.
Old Song ran over and the first thing to check was the brakes.
The aerodynamic shape of the aircraft should be no problem. The biggest reason may be the brakes.
Sure enough, when Song Lao put his hand on the brake, he almost called out, it was hot!
"There is a problem with the brakes." Song Lao said: "The braking force on both sides is not uniform. Adjust the brakes immediately!"
Any small problem may cause the performance difference between the new fighter and the prototype.
In a word, the domestic basic industries are not good enough. Based on the domestic basic industries, what you get is the current results.
The problem is in the brake disc.
In later generations, some drivers saw rust on their brake discs and immediately complained, what kind of broken car is this? It's rusty!
Yes, he was quite dissatisfied when he saw that the brake disc was rusted. At this time, someone would come up with an idea: "I want to avoid rust. It's easy to say. You can put some oil on it and lubricate it. Yet?"
Of course, this is a joke, if you really wipe the oil, it is definitely a brain convulsion.
Because most cars use metal-based brake discs, they are just a piece of iron, or a piece of iron that will rub against the brake pads at any time. The surface is very bright. When there is water, rust is inevitable.
If you want to find something that does not rust, there are only high-performance cars that use ceramic brake discs.
Of course, ceramic brake discs are not the most advanced ones. The most advanced ones are carbon-carbon based brake discs.
Metal-based brake pads have low friction coefficient and poor high temperature resistance, so they are not the best choice. Another important factor is its weight.
The weight of the brake pads has little effect on the car, but it is very different for the airplane. For an aircraft flying in the sky, one kilogram less weight has a non-negligible effect on the overall carrying capacity and endurance of the aircraft.
Therefore, the brake pads on advanced aircraft are now replaced by carbon-carbon-based brake pads. Because carbon-carbon-based brake pads have good high temperature resistance, high friction coefficient, high temperature corrosion resistance, etc., the most important thing is that carbon-carbon-based brake systems can reduce weight by more than 40% than metal-based brake systems, and the service life is 5-7 times the metal base!
In history, the pilots of Han Dynasty watched the Phantom 2000 flight show. When the opponent flew down, they found that they stopped directly. Everyone quickly went to look at the brake pads and touched the brake pads with their hands. When it was hot, everyone was shocked, beyond their knowledge!
However, this is not something that can be made if you want to make it. Han's carbon-carbon-based brake system will not achieve a breakthrough until more than ten years later.
Therefore, although they saw that the prototype was equipped with carbon-carbon-based brakes, their current imitation still uses the original metal brakes. When adjusting, the strength is different, which caused the aircraft to run off.