Lin Yuan's eyes widened when he heard Hou Zhengfeng's words, and he asked, "What did you say?" Can you win them without rails? ”

Hou Zhengfeng nodded confidently, and Lin Yuan smiled helplessly: "Old Hou, are you kidding me?" You and Cindick made a bet to build a railroad and compete to see whose train would run faster, but now you say we don't lay the tracks, and we want to win them, how do you win? ”

Hou Zhengfeng smiled and said, "Don't worry, when the time comes, I will personally pull the train to run and ensure that it will run faster than that syndicate's train." ”

Cindick took the engineering team to the test venue early, Cindick looked around, and didn't find the railroad tracks laid by Lin Yuan, so he couldn't help but be secretly proud, thinking: "There are no railroad tracks, they lost this competition." ”

After waiting for a while, Cindick saw Lin Yuan and Hou Zhengfeng come to the venue in a hurry, and Cindick asked with a smile, "What about your railway?" There is not even a railway, what to compare? ”

Hou Zhengfeng "hehe" Yile and said: "What can't be compared, come on, you guys start running now." ”

Cindick nodded and said, "Then I'll convince you of the loss, and before the competition, I'll show you around our railroad in the United States." As he spoke, he took Lin Yuan and Hou Zhengfeng to the side of the railway, pointed to the railway, and said: "We built a circular railway, and we originally planned to race with you, run fifty laps on it, and see who has less time, but since you don't have a railway, then I'll show you what a real railway is." ”

Cindick pointed to the railroad in front of them and said, "See? This section is a straight railway, the front section is a curved railway, we Americans have built tens of thousands of miles of railway, hundreds of times more than you Chinese, but the form of the railway can be classified into these two, straight line and curve. ”

Cindick walked a long way forward with the two of them, pointed to the curved railroad tracks in the distance, and said, "Don't think that a straight line and a curve are simple, the knowledge in it is deep!" As he spoke, he crouched down, patted the railroad under his feet, and said, "Look at this section of the railway, it is between straight and curved rails. ”

"When the train travels on a straight track and a curved track, the force characteristics are very different, so we need such a curve as a buffer, we call this curve 'ease curve', its shape is a complex space curve, you don't understand too much."

Cindick stepped forward a little further, kicked the railroad in front of him, and said, "See? The rails on one side are a block higher than the rails on the other side. ”

Hou Zhengfeng finally couldn't help it, and said: "Because there is a lot of centrifugal force when the train turns, if this centrifugal force is all borne by the rail, the rail is easy to be damaged, so build the outer rail higher, let the train tilt, gravity can produce a component in the direction of centrifugal force, you can offset a part of the centrifugal force, this height is called the railway super high, I said can you stop showing off, what about your train, hurry up and start." ”

Cindick smiled disdainfully, "You can't wait to see our train, huh?" Well, I'll satisfy you. After speaking, he led the two to a train parked on the railway, the train is composed of a locomotive and a carriage, generally a locomotive can carry more than a dozen carriages, but this train has only one carriage.

Cindick took Lin Yuan and Hou Zhengfeng to the car, and said with a smile: "This is our high-tech product of the United States of America, the track inspection vehicle, this kind of vehicle can comprehensively measure the laying of the track, including whether it is paved or not?" Are the left and right sides the same height? How much ultra-high it is, it can be detected by this car, and the sensors on the car can't be made in your dreams. ”

Lin Yuan felt funny when he heard this, and thought: "In our era, when China built high-speed railways, there were no advanced rail inspection vehicles at the beginning, so they could only buy them from abroad. ”

Hou Zhengfeng didn't speak, nodded and smiled: "Okay, let's start, I'll time you." ”

Cindick smiled and made a departure gesture to the cab, and the inspection car immediately started to drive, running on the railroad tracks, making a rhythmic "click" sound, Cindick listened to those sounds, closed his eyes in intoxication, and said while waving his hand to beat the beat: "Listen, what beautiful music, only the concerts of the Vienna Musikverein can compare with it." ”

Hou Zhengfeng asked, "Judging from the sound of the train moving, there is a gap between your tracks, right?" And your tracks are about fifteen meters each, right? ”

Cindick smiled: "That's right, it seems that you still have some skills, all the rails in the world are like this, and each section of the rails is combined into a long railway." ”

Hou Zhengfeng said with a smile: "You haven't thought about connecting all these gaps, so that you can make a seamless railway." ”

Cindick asked, "Seamless railroad?" What does it do? ”

Hou Zhengfeng said: "I believe you also know that the train will produce strong vibration when passing through the gap, and the force generated by this vibration is a great harm to both the train and the track, so in the case of the railway gap, the speed and carrying capacity of the train are limited, if we weld the gap to death, the speed and carrying capacity of the train can be greatly increased." ”

Lin Yuan thought to himself: "Hou Lao has finally exerted his might, what he is talking about is the most widely used seamless railway in modern times!" Seamless railways didn't appear until the twenties of the twentieth century, and this Cindick certainly hadn't heard of it. ”

Unexpectedly, Cindick smiled and said, "I don't know where you studied railway engineering, don't you know Lu Dao?" The rail will expand and contract, and the expansion will not cause harm when there is a gap, but if there is no gap, the rail will be expanded and cracked! ”

Hou Zhengfeng smiled disdainfully and said: "If the railway is our Chinese shop, there will be no expansion, believe it or not?" ”

Cindick shook his head disdainfully, turned away, and no longer paid attention to Hou Zhengfeng, but asked the staff in the inspection car: "How is the track data measured?" ”

The staff replied, "The data is all right. ”

Hou Zhengfeng suddenly asked, "How many laps have we run?" ”

Lin Yuan looked at the odometer and said, "It's almost twenty laps, what's wrong?" ”

Hou Zhengfeng shouted at Cindyk: "Stop, stop quickly, let's get off!" ”

Cindick asked, "Why do you want to get off the bus?" ”

Lin Yuan also asked Hou Zhengfeng in a low voice: "Yes, Old Hou, I am still looking forward to your counterattack, why do you want to get out of the car?" ”

Hou Zhengfeng said: "Hurry up and stop, if you don't stop, I can jump out of the car." ”

Cindick reluctantly stopped the car, and Hou Zhengfeng said to him: "Sun Tzu, you keep running, if you can run fifty laps, you win!" ”

The train started again, and Lin Yuan frowned and asked, "Old Hou, what kind of medicine are you selling in your gourd?" ”

Hou Zhengfeng smiled and said, "Wait, they will have to stop in a while!" ”

(Today's second shift is at 8 o'clock)