Lin Yuan and Shen Wanqing returned to Beijing together.

Shen Wanqing suddenly asked: "I heard that the Empress Dowager Cixi gave you a big beauty!" ”

Lin Yuan smiled and said, "How did you know the Dao?" ”

Shen Wanqing said: "The paper can't contain the fire, how can I not know the way, okay, don't talk about this, I'm going to return to the society." After speaking, she smiled at Lin Yuan and walked towards the newspaper office.

In this era, there were no street lights, only dim moonlight, Lin Yuan quickly walked two steps to her side, and said, "It's so late, I'll send you back." ”

Shen Wanqing thought for a while and said, "Where are you going?" I'll send you anyway. ”

Lin Yuan smiled embarrassedly, with her skills, she was the only one who gave her own share, so he said to her: "I want to go to the China Railway Company to see how their railway design is." ”

Shen Wanqing smiled: "Okay, let's go, I'll tell you how to prevent being followed on the way." ”

When the two of them came to the China Railway Company, Lin Yuan saw that the lights were still on in the building, and the door at the door had fallen asleep on the table, Lin Yuan entered the building and walked to Zhan Tianyou's office. Some people buried their heads in piles of paperwork, holding slide rules in their hands, and constantly checking the data......

Lin Yuan came to Zhan Tianyou's office, and saw that Zhan Tianyou was giving a lecture to the people in the room, it seemed that the lecture was almost over, and he was making the final summary: "Didn't we want to build a railway to Guanwai for a long time?" Now the opportunity has come, all parts have to go all out, who has any difficulties? ”

At this time, a person stood up and said: "Lord Zhan, after we bought railroad tracks, sleepers and other raw materials, there is not much left, and we still have to transport the workers outside the customs, which is a lot of expenses......

Zhan Tianyou said: "Those workers are doing hard work, can't they be re-recruited outside the customs?" ”

The man said: "We are worried that we will not be able to recruit workers outside the customs. ”

At this time, Lin Yuan interjected outside the crowd: "It's okay! Don't worry, if you mention my name, you'll be able to recruit workers. ”

When everyone saw Lin Yuan coming, they all stood up, Zhan Tianyou waved his hand to let everyone disperse, he walked to Lin Yuan's side and asked, "It's so late, Lord Lin doesn't rest, why did you come to me?" ”

Lin Yuan said: "Let's not talk about polite words, how is your railway designed?" ”

"There are precedents for the style of the roadbed, sleepers and rails, so it is relatively easy to design, and we are now designing the railway bridge," Zhan said. ”

Lin Yuan said, "Show me the bridge piers." ”

Zhan Tianyou took a drawing and said, "According to the requirements of the adults, we have controlled the weight at about eight tons. ”

Lin Yuan looked at the bridge pier, it was the shape of a conical platform, Lin Yuan estimated the position of its center of gravity according to its shape, and then pointed to that position, and said, "Design an ear platform in this place where you can hang things." ”

Zhan Tianyou asked, "What do you do when you design that thing?" ”

Lin Yuan said with a smile: "I want to ask the mountain god to move this thing, this ear platform for hanging things is to let the mountain god catch this bridge pier." ”

Zhan Tianyou asked in surprise, "You're not kidding, are you?" Mountain god, is there really a god in this world? ”

Lin Yuan said: "You just do what I say, don't worry, I have studied mountain moving, I will definitely be able to move this bridge pier." ”

Zhan Tianyou looked at Lin Yuan suspiciously, he couldn't know what he wanted, what Lin Yuan wanted to do was to use the helicopter on the Beijing ship to lift the bridge piers and place them on the Daling River!

The use of helicopters to lift heavy objects for installation is nothing new, and in Lin Yuan's time, China had a precedent of helicopters installing electric towers in uninhabited areas of the plateau.

A day later, a helicopter transported several soldiers from the Beijing ship to Lin Yuan, where much of the equipment had to be lifted when it was replaced, so the lifting operation was not a difficult task for them.

Two days later, according to Lin Yuan's request, the bridge piers were poured with concrete in a factory outside Tianjin, and there were only two bridge piers in total.

A soldier lit a smoke bomb in the open space, the orange-yellow smoke went straight into the sky, it was extremely dazzling, and a helicopter quickly appeared in their sight from the sky, it was a Z-25 on the Beijing ship, the reason why Lin Yuan wanted Zhan Tianyou to control the weight within ten tons, is because the limit of the lifting weight of this helicopter is ten tons.

Straight 25 not only has the purpose of rescue, but also bears the task of cargo transportation, so the lifting hook is installed on the fuselage, in order to reduce the impact of the lifting object on the helicopter flight, the lifting hook should be as close as possible to the center of gravity of the helicopter, the lifting hook of the straight 25 is installed under the main reset, and this position is close to the center of gravity.

The main reducer is a very important part of the helicopter, the engine used in the helicopter and the engine of the fixed-wing aircraft are similar in principle, they are both gas turbines, the speed of the gas turbine spindle is very high, and the high speed is unbearable for the rotor to bear, so the speed needs to be reduced by the reducer.

The helicopter found the yellow smoke, flew towards the yellow smoke, and put down the hoisting steel cable near the bridge pier, and the ground personnel quickly fixed the steel cable on the ear platform of the bridge pier, and after checking that it was correct, a soldier waved the signal flag and sent out a signal that the hoisting was completed.

The captain of the helicopter, the pilot He Di saw this signal, and slowly pulled up the total pitch lever to the pitch lever, the total pitch lever is the equipment for controlling the helicopter to lift and off, with the total pitch lever pulled up, the rotor blades were lifted to the pitch, the lift provided by the rotor increased, and the helicopter slowly rose.

When the helicopter rises to a predetermined height, He Di pulls the periodic pitch change lever, and by manipulating the periodic pitch change lever, the blades of the helicopter are tilted forward, so that when the blades rotate, the helicopter provides thrust, and He Di pedals the left rudder, and the helicopter turns a corner to the left and flies in the direction of the Daling River.

He Di stared at the color LCD in front of him, which displayed all the information related to flight, such as atmospheric data, engine operation data, helicopter heading data, etc., he stared at the speed display area, and from time to time swept the mechanical instrument under the LCD with his eyes, and checked the data on the two tables. Although the helicopter has a fully digital cabin, some mechanical instruments are still in place, just in case.

In order to ensure safety, it is absolutely forbidden to carry out hoisting operations under the condition of more than six winds, and the wind speed of the six winds is about 36 kilometers per hour, so He Di controls the periodic pitch lever and throttle lever to keep the speed below 36 kilometers per hour.

After a few hours of flying, he finally reached the ice of the Daling River, and the time to test him the most was finally here.