"Students, due to the special nature of this race track, each of you will have an hour to modify your own 4WD. Hurry up and modify it into a 4WD that can run perfectly underwater!" the 4WD Fighter shouted. All the contestants breathed a sigh of relief.
Now that they were given an hour, they could carefully think about how to deal with the harsh conditions of this race track.
First of all, waterproof tires were a must. Only waterproof tires could run stably underwater.
But that wasn't the most important problem. The most important problem was how to protect the 4WD from leakage.
Since the mini 4WD had rushed into the water, it was inevitable that it would enter the water. Once it entered the water, it would have a fatal effect on the motor and battery. In just a few seconds, the mini 4WD that had entered the water would be completely destroyed.
"What should we do?" All the contestants fell into deep thought.
Among them, the contestants who had purchased the Silverfish Engine had bright smiles on their faces. The Silverfish Engine was a special engine specially made for underwater driving. It had a strong waterproof effect. According to the engine's manual, the Silverfish Engine could run underwater for more than an hour.
As a result, the players who had purchased the Silverfish Engine had bright smiles on their faces. Those who hadn't prepared the engine had ashen faces.
Of course, just the engine wasn't enough. The battery had to be waterproof as well. At the same time, the electric current wouldn't be affected by the water.
"I wonder if there are many impurities in the water. If there are too many impurities, it'll be troublesome!" Water itself wasn't a conductor, but if there were impurities in the water, it would be terrible!
Looking at the pool in front of him, Liu Nian fell into deep thought. The conductivity of water was determined by the amount of impurities in the water. If there were too many impurities in the water, such as sewage, the 4WD would easily have problems with short-circuiting.
In fact, Jia Yapeng wasn't so perverted as to use sewage for the race. This was pure water that Jia Yapeng had specially obtained. Although it wasn't at the level of pure experimental water, there weren't many impurities in it. At most, it had a weak conductivity. The low current of the 4WD wouldn't affect it too much.
The underwater race track only looked scary, but it wasn't that scary. Even an unmodified 4WD could run underwater for a while, but it would be great if the motor and battery were waterproof.
Naturally, Liu Nian couldn't afford the Daqian's Silverfish engine. At the same time, a huge problem with Liu Nian's racing car emerged.
Because the engines that Liu Nian modified did not have an engine shell, they could only rely on the engine compartment to protect the engine coil.
After all, the engine room still needed to be powered by gears and shafts. Therefore, there must be a hole in the engine room for the shafts to enter. If the car fell into the water, the water would enter the engine room through the hole. That would be the end of the car.
Due to the lack of time and materials, the little guy did not have the time to modify the engine or the racing car. However, if he did not completely modify the car, the water problem could not be solved. This was a big problem.
"Little guy, what will you do?" Jia Yapeng, who was sitting in the VIP room, looked at the little guy who was scratching his head and cheeks with a curious expression. He wanted to see if this genius little guy had a way to deal with the problem of waterproofing.
Time passed by, and soon, an hour had passed. Many children couldn't think of a good solution at this time. They could only reluctantly do some waterproofing work, then bite the bullet and walk to the starting point of the race track with their 4WD.
"Let's go!" As soon as the 4WD Fighter gave the order, all the 4WD cars were put on the track at the same time, then they started galloping.
The first few cars in the semi-finals were ranked at the top, but the gap between them and the cars behind them wasn't that big. After all, everyone's parts were similar, and the difference was only some small problems.
But very quickly, there was a car that was lagging behind by a very obvious margin. This car was Liu Nian's Evangelion.
At this time, the track had not yet entered the water, but the speed of Liu Nian's Evangelion had become quite slow. It was only about one-third of the speed of the other cars. Naturally, it was lagging behind from the start. When the other cars had entered the second turn, his Evangelion had not yet entered the first turn.
"Hey, there seems to be a problem with our Evangelion. What happened? Did the modification just now cause any damage to the racing car's functions? " The 4WD Fighter, who was in charge of the commentary, asked curiously. The other audience members were also very curious, but they didn't understand what happened.
"Strange, this little guy's car seems to have become very heavy, especially the rear part of the car. It seems to be very heavy!" As a professional, Jia Yapeng could vaguely see some clues when he saw the Evangelion's driving condition on the screen, but he didn't know the specific reason. Jia Yapeng didn't know.
After about two minutes, all the cars in the front had entered the underwater track. At this time, Liu Nian's Evangelion had just finished one-third of the distance, and the gap between it and the other kids was nearly 30 seconds. Under normal circumstances, this gap is absolutely impossible to catch up with, and Liu Nian can already admit defeat.
However, Liu Nian's face didn't show much anxiety. Instead, he was full of confidence, which made many viewers curious about this kid. At the same time, the first batch of cars that entered the water began to have various problems.
The first problem was the speed of the cars. The resistance of the water was much greater than the resistance of the air, so the cars' original speed of nearly 30 meters per second dropped to about 10 meters per second after entering the water. This is a speed that a child can catch up with as long as he runs a little.
The speed of some of the racing cars dropped to 7 meters per second after they entered the water, which made all the children anxious.
From here, the cars were divided into two echelons. All the cars that could reach a speed of more than 10 meters per second rushed to the front, and the rest gradually fell behind.
Some of the cars were getting slower and slower, and finally stopped slowly.
The owners of these cars quickly rushed into the water, picked up their cars, and replaced them with two new batteries, but it was useless. This is because their engines have been flooded with water and are completely useless. Only by replacing the engines can they recover their power.
However, replacing the engines takes a lot of time, so they are bound to lose.
Just as these children were in despair, a figure slowly caught up with them. At the same time, his Evangelion was like a blue submarine, swimming leisurely in the water, directly overtaking these unlucky children and chasing after the second echelon.
"Isn't this car lagging behind? How did it suddenly become so fast!! " Seeing the gospel soldier chasing after them, the children who witnessed this scene couldn't help but exclaim in shock.
However, the children were wrong. Evangelion's speed didn't increase. It was just that after entering the water, his speed slowed down a lot compared to other cars.
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