Zhang Yifei's tone and expression were very calm, but when Junko Takeda saw the Renault racing car less than half a meter away from the isolation wall, she understood how thrilling it was just now.

So she turned around and asked Yamamoto Ukyo, "Aren't you changing to a neutral tire this time? It's logical that the tires are harder and not easy to burst. Why does this happen?"

"I wonder if there is something wrong on the track that was crushed by Yifeijun?"

Yamamoto Ukyo thought of this possibility and came to the next side of the racing car. It was as if the tires were broken out for ordinary civilian cars. As long as it was not driven for dozens of kilometers, the outer tires and inner tubes were basically different from the complete appearance.

Formula racing tires are metal mesh without inner layers. Once the tires are in high speed, they will be torn into pieces instantly, leaving only a wheel hub hanging on the car.

So Yamamoto Ukyo could not find any traces of foreign objects' tire blowouts. Apart from the rubber pieces left behind the tire blowouts, no other debris could be found on the track.

"It's just a tire blown up. Don't be so nervous. Find a way to change the tire and get the car back to the repair station first."

"Okay, Brother Zhi and I will go back and push the tire frame over."

Ahu immediately responded, and then returned to the repair station with Chen Zhi, preparing to bring the tools and spare tires.

In fact, Formula racing, even if it is a tire blown, it is OK to drive it back with a hard time.

For example, if the tires in the F1 are blown up in the middle of the race and are still on the track without losing control, it is still a long way from the maintenance station. Many drivers grit their teeth and drive over at this time. At worst, they can just change the wheels, which is much better than quitting the race.

But the problem is that if you convert this wheel to RMB, it will cost tens of thousands! Moreover, the accident that occurred during the trial run is not within the scope of Toyota event sponsorship, which means that Zhang Yifei needs to pay the money himself.

Although the competition did not cost much during this period, Zhang Yifei spent less than 100,000 yuan on the hotel expenses, car rental expenses, and racing losses during the trial run.

According to Zhang Yifei's estimate, Renault's 2000 European Cup will be completed in the entire European Cup, even if it goes well, it will be estimated that it will cost millions, which is really not a small amount of money.

Therefore, Zhang Yifei felt sorry for spending this kind of expense of scrapping a wheel hub.

Yamamoto Ukyo still squatted beside the racing car, checking the condition of other tires, and trying to find out the cause of the tire blowout.

In this era, the supplier of f1 racing tires is Bridgestone, a top 500 Japanese company, and one of the three largest tire giants in the world.

Although Renault’s Formula Racing does not have a designated tire manufacturer brand, Toyota is also a Japanese company, and due to its convenient supply, it still chose Bridgestone tires.

Moreover, Bridgestone has a good reputation in the F1 track in the past two years and has not had any major flaws. Logically speaking, the test runs today were all newly replaced tires, and the ones were replaced with neutral tires, so there should be no tire blowout accidents.

So Yamamoto Ukyo is worried that it has nothing to do with the tires, but the problem of the racing itself. If that happens, even if the tires are changed, there will still be a risk of tire blowout on the track, and he must find out the problem.

Zhang Yifei is just a driver, not a maintenance technician. He can also help with tire accessories when changing ordinary vehicles. The professionalism of Formula racing has exceeded his knowledge, so he can only stand by and watch.

At this time, He Ziling took out a kettle from her backpack and handed it to Zhang Yifei and said, "Look at your sweaty look, drink a little water."

Hearing this, Zhang Yifei looked at He Ziling beside her. Because of her running, her face was flushed, and her forehead and nose were covered with sweat.

"You drink it, I'm not thirsty."

Zhang Yifei was more scared and sweating in cold sweat than thirsty.

"It should have been very dangerous just now, you...you should be careful in the future."

He Ziling muttered in a low voice. When she ran to the scene just now, she had always wanted to ask about Zhang Yifei's situation, but there were too many people and she couldn't interfere.

She had experienced a track accident with He Lang before and knew what the consequences of an accident were astonishing as the speed of the car. So when she heard Takeda Junko say something happened before, she was also nervous.

But due to the two people who are currently above their classmates and barely competing for their friends, He Ziling couldn't give too much advice, so she could only whisper to remind Zhang Yifei to be safe.

Listening to He Ziling's instructions, Zhang Yifei raised his lips and smiled, but did not answer.

The word safety seems to be a thing that is abandoned for racers.

Because once you pursue the speed limit, you are destined to be out of safety. No driver dares to say that he can always play in the track safely, and even better than Senna will eventually fail.

But even though you know that some actions are not safe, the driver will still choose to challenge the limits.

Just like Zhang Yifei almost crashed into a car just now, he was actually afraid of making a cold sweat, but if he was asked to run another lap, he would still choose not to step on the brakes to challenge the cornering limit. This is the courage and courage that a professional driver should have.

Ahu and Chen Zhi were moving very quickly. A cart was placed with tires and disassembly tools and were taken to the scene of the accident.

Yamamoto Ukyo inspected the vehicle's wheel hub and braking system and found no problems. It seemed that this incident was indeed an unexpected situation.

"First change the tires, then drive the car back to the repair station. This time you need to check carefully to avoid hidden dangers."

Junko Takeda conveyed the meaning of Yamamoto Ukyo. Ah Hu and Shi Ge held a spare tire and replaced it in just a few seconds.

After all, they also learned a lesson from the Toyota technical team. The most basic work in the maintenance of the equation of tire change is still no big problem.

After changing the tires, several people pushed the Renault racing car from the gravel buffer zone to the track and then reignited it with an external power supply.

At this time, Zhang Yifei got into the car again, but he did not continue to test the car, but slowly drove the car back to the repair station. Generally, after an accident in Formula racing, it must be thoroughly inspected to prevent damage to other parts.

In fact, in addition to him, a F1 driver named Lasenberg died in the qualifying race the day before.

The location where Larsenberg was in the big straight road in the stands of the Imora Raceway. Because of the big straight road, the car was very fast, exceeding 300km/h.

The higher the speed of the car, the greater the wind resistance. In addition to such high-intensity wind resistance, the fixed wind wings in the front of the car suddenly fall off, causing the car to lose control and install the cement wall.

Moreover, the F1 racing car at that time did not have a hans neck protection system. The violent impact caused Larsenborg to have a fracture of the skull base and died of serious injuries. It can be seen that at the high speed of Formula Racing, any small part will cause unknown serious consequences.

That's why, an F1 race car requires up to 22 maintenance technicians to serve, it is too sophisticated and too dangerous.

Zhang Yifei drove the car back to the repair station, and Yamamoto Ukyo collected large pieces of tire fragments on the track to avoid these debris posed hidden dangers to other riders.

After picking up a few pieces, Yamamoto Ukyo suddenly touched his hand to the ground, then quickly took out an infrared thermometer from the tool kit he carried with him, and measured the temperature of the ground.

Immediately afterwards, Yamamoto Ukyo ran out of the forest, aimed at the road surface where the sun was shining, and measured the quantity again.

After comparison, Yamamoto Ukyo showed a sudden enlightenment expression on his face, and then said to Junko Takeda who was following him: "Sunko, I know the reason why Ichiki's tire exploded!"

“Temperature difference?”

Junko Takeda looked at Yamamoto Ukyo's actions, and she had already guessed the meaning behind it. However, this situation is extremely rare and rarely meets this condition.

"Yes, the temperature of the track ground being directed by sunlight is close to 60c, but the temperature of the road surface in the tree-shaded area is only about 30c, and the temperature difference between the two is nearly twice!"

This is the most unique thing about Hoganheim, that is, it has a tree-lined track with no direct sunlight, which makes the track temperature difference very large.

You should know that when the ground temperature is close to 60c, the Renault Racing tire temperature may be as high as an astonishing 130c. If the road surface is always in the sun and the temperature does not change much, there is no risk of a tire blowout.

But once you enter the tree-lined track, the huge ground temperature difference makes the tire unable to withstand this change of cold and hot, and it is easy to have tire blowouts.

To be honest, if you do not have rich engineer experience, such changes in ground temperature details will be difficult to detect.

This is actually considered a shortcoming of Yamamoto Ukyo. This is his first time as a competition engineer on a temporary basis, and there are indeed shortcomings in many aspects. If an experienced engineer is an engineer, he may have reacted immediately.

The problem was found, but it was difficult to solve now. The track temperature changes were not something they could control. So after packing up the large tire fragments on the ground, several people returned to the maintenance station first to discuss countermeasures.

In the repair station, Zhang Yifei had already changed into a racing suit at this time. Because of such an accident, there was definitely no way to go for a trial run today. Taking off the racing suit early can make it breathable and cooler.

Seeing Yamamoto Ukyo and several others coming back, Zhang Yifei asked at this time: "Ukyo, have you found the cause of the tire blowout?"

"I found that the change in the temperature difference of the track ground is the main cause of tire blowout."

"Temperature difference change?"

Zhang Yifei didn't understand at once. He had no experience in these things and did not know much about them.

"Yes, the temperature difference between the tree-lined track and direct sunlight is nearly twice. If the tires suddenly encounter this kind of cold and hot change, it is easy to burst."

"Then how to solve this problem?"

“There are basically no solutions except for weather changes or changing to harder tires.”

The track layout is fixed, and the boulevard track is also a feature of Hoganheim. Unless the weather on that day turns cloudy or rainy, it is impossible to change this temperature difference.

Another way to prevent tire blowout is to replace it with harder tires, but to be honest, neutral tires are already considered hard tires for high-speed tracks like Hoganheim.

If you replace a harder tire, although the risk of tire blowout can be greatly reduced, the same grip will be greatly affected by the speed.

This faces a choice that drivers often encounter, whether to be safe or speed?
Chapter completed!