Chapter 197

"Dear students, because the track is special this time, each of you has an hour to transform your car. Seize the time and transform a 4WD car that can run perfectly underwater!" the 4WD fighter shouted, which made all the players breathe a sigh of relief.

This time I gave them an hour, that's good. They can think carefully about how to deal with this harsh track.

First of all, special waterproof tires are necessary, because only waterproof tires can drive stably in water.

But this is not the most critical issue. The most critical issue is how to protect 4WD vehicles from electric leakage.

Since the 4WD vehicle has rushed into the water, it is inevitable to enter the water. Once it enters the water, it will have a fatal impact on the motor and battery. In less than a few seconds, the 4WD vehicle entering the water will be completely abandoned.

"What should we do?" all the players were lost in thought.

The players who bought the silverfish engine showed a bright smile on their faces, because the silverfish engine is a special engine specially made for underwater driving, which has a very strong waterproof effect. According to the engine manual, the silverfish engine can keep driving in the water for more than an hour.

Therefore, the players who prepared the silverfish engine laughed brightly, and those who were not prepared were as pale as ashes.

Of course, just having an engine is not enough. The battery also needs to be waterproof, and the current will not be affected by water.

"I don't know if there are many impurities in the water. If there are too many impurities, it will be troublesome!" water itself is not a conductor, but it's bad if the water contains impurities!

Looking at the pool in front of him, Liu Nian fell into meditation. The conductivity of water is determined by the amount of impurities in the water. If there are many impurities in the water, such as sewage, 4WD cars are prone to short circuit.

In fact, Jia Yapeng has not abnormally brought sewage to the competition. This is the pure water specially brought by Jia Yapeng. Although it does not reach the level of pure water for experiment, there are not many impurities in it. At most, it has a little weak conductivity. The low current of 4WD will not have a great impact.

In fact, this underwater track looks scary. It's really not so scary. Even a non modified 4WD can run underwater for a while, but it's best to take waterproof measures for the motor and battery.

Naturally, Liu Nian can't afford the special silverfish engine produced by Daqian. At the same time, a huge problem of Liu Nian's car itself has emerged.

Because Liu Nian's engines have no engine shell, they can only rely on the engine compartment to protect the engine coil.

But this is not really completely closed. After all, the power of the engine room still needs to output power through gears and shafts, so the engine room must have a hole for the shaft to enter. If the car enters the water, the water will enter the engine room through the hole, and that's over.

Time is tight and there is a lack of materials. The little guy doesn't have time to transform the engine or the racing site, but if he doesn't completely transform it, the problem of water ingress can't be solved, which is a big problem.

"Little guy, what will you do?" Jia Yapeng, sitting in the VIP lounge, looked at the little guy scratching his head and cheeks, showing a curious expression. He wanted to see if this talented little guy had a way to deal with the problem of waterproof.

As time went by, an hour soon arrived. Many children didn't think of a good way at this time. They had to do some waterproof work reluctantly, and then walked to the starting point of the track with the 4WD.

"Let's go!" at the command of the 4WD fighter, all the 4WD cars were put on the track at the same time, and then galloped up.

The first few in the semi-finals are not unexpected, but they are not far away from the cars behind. After all, everyone's parts are almost the same, and the difference is only some small problems.

But soon, a racing car fell at the end with a very obvious gap. This racing car is Liu Nian's Gospel warrior.

At this time, the track clearly has not entered the underwater, but the speed of Liu Nian's Gospel warrior has become quite slow. It is only about 23 speeds of other cars. Naturally, it was dropped to the end at the beginning. When many cars have entered the second corner, his blessing warrior has not entered the first corner.

"Eh, there seems to be a problem with our evangelical soldiers. What happened? Did it damage the function of the car during the transformation just now?" the 4WD fighter in charge of interpretation asked curiously with a microphone. Other audiences were also very curious, but they didn't understand what happened.

"It's strange that the little guy's car seems to be getting very heavy, especially at the back of the car. It looks very heavy!" Jia Yapeng, a professional, saw the driving condition of the evangelical soldiers on the screen, and he vaguely saw a clue, but he didn't know what the specific reason was.

After about two minutes, all the cars at the front have entered the underwater track. At this time, the evangelical soldiers have just completed the 23 mile journey, which has been opened by all the children for nearly 30 seconds. Under normal circumstances, this is a gap that can't be caught up. Liu Nian can admit defeat.

However, Liu Nian's face did not have too many anxious expressions, but full of confidence, which made many viewers curious about the child. At the same time, the first batch of racing cars that took the lead in entering the water also began to have various problems.

The first is the speed problem. The resistance of water is much greater than that of air, so the speed of the car was nearly 30 meters per second. After entering the water, it suddenly dropped to about 10 meters per second. This is the speed that a child can catch up with as long as he runs a little

In some racing cars, the speed dropped directly to about 7 meters per second after launching, which made all the children anxious.

From here, the car continues to be divided into two echelons. All cars that can speed up to more than 10 meters per second rush to the front, and the remaining cars gradually fall behind.

Some of the cars slowed down and finally stopped slowly.

These car owners rushed into the water, picked up their baby car and replaced it with two new batteries, but it was useless. This is because their engine has been flooded and completely scrapped. Only by replacing the engine can they restore power.

But changing the engine takes a lot of time, and they're sure to lose.

Just when the children were desperate, a figure slowly caught up. At the same time, his gospel warrior, like a blue submarine in the water, swam leisurely in the water, directly surpassed these unlucky children and chased the second echelon.

"Didn't the car fall behind? How did the speed suddenly become so fast!!" the children who saw the scene were shocked and said to themselves.

But these children are wrong. The evangelical warrior doesn't get faster. He just reduces his speed much less than other cars after entering the water.