Tan Dailei said: "Yes, it has always been the case." In the past, it was mixed manually, but now it is mixed by machine.
Li Wenjun said: "The on-site weighing ratio may have a large deviation, and then the materials are piled outdoors with a lot of impurities."
Tan Dailei frowned, thought for a moment, and asked, "How about that?"
Li Wenjun said: "Let me get you a concrete mixer truck. All the materials will be assembled and loaded in the factory, and then transported to the airport. Calculate the time and mix while walking. When you arrive, the mixing will be finished, and you will be responsible for the back.
process."
Tan Dailei was stunned for a while and then said: "You can try it."
The large trucks from the automobile factory are ready-made. All you need to do is modify them and add a mixing tank and a rotating loading and unloading device.
So the concrete mixer truck was ready in a few days.
Then Tan Dailei personally guarded the factory, watching people weigh the materials and put them into the tanker, and then followed the truck to the construction site, and then watched people flatten and vibrate the mixed concrete on the experimental site next to it...
A few days later, he called Li Wenjun: "Okay."
Li Wenjun smiled: "Okay, congratulations on solving this problem. Now you can pour continuously."
He just liked Tan Dailei's seriousness.
With this spirit, you can do whatever you want.
-----
Li Wenjun asked the aircraft factory to continue to improve passenger aircraft and continue to develop helicopters.
The aircraft manufacturer is very confident.
We have the drawings, we know the principles, the materials are more advanced than others, and the engine manufacturing level is among the best in the world.
The unmanned aircraft they made before flew extremely smoothly. The principle is the same as that of a helicopter, but it is larger in scale and requires people to sit on it.
A piece of cake!
Dong Qingjun wants to "meddle" again, ah, no, he wants to participate and assist.
Then Han Weijun stopped him in advance: "Do you really remember which factory you are from? Can you just stay in the car factory and develop cars for me?"
It's a pity that Han Weijun can't control Dong Qingjun.
The aircraft factory made an electric model that was scaled down 10:1 and made a test flight today.
Dong Qingjun was waiting on the tarmac in front of the aircraft factory early in the morning.
People in these factories are no longer surprised by Dong Qingjun's arrival.
It would be strange if he didn't come.
Then everyone should think about whether the things they develop are so backward and boring that even he is not interested in them.
The people from the aircraft factory rolled the model out and parked it in the center of the apron.
Then Dong Qingjun began to circle around the helicopter model with great interest.
The director of the aircraft factory was afraid that he would do something behind their backs, so he quietly called someone to keep an eye on Dong Qingjun, euphemistically calling it "collecting opinions."
In fact, no one planned to ask Dong Qingjun for his opinion, because there would definitely be no good words.
For today's test flight, the aircraft manufacturer even went to the weather station to confirm that it was a sunny day with no wind and no fog.
The aircraft factory has always been the most show-off, the most serious and serious among all the factories.
There were people recording, videotaping and recording the test flight today.
All the people in the aircraft factory wear windproof glasses.
The director of the aircraft factory nodded to everyone with a serious look on his face: "Let's get started."
The recorder said into the recorder: "On July 10, 1993, at eight o'clock in the morning, the first test flight of helicopter model No. 1 began."
Then someone over there pressed the remote control, and the helicopter's blades began to rotate.
Only now did Dong Qingjun understand why everyone wears windproof glasses.
Although it is a model, the wind blows so hard that people can't open their eyes.
He immediately ran in, took a pair and came out again.
Everyone stared nervously at the helicopter.
Their test flight goal today is very simple, that is, the helicopter takes off and leaves the ground, moves left and right, then lands, ending.
The operator pressed the remote control for takeoff.
The helicopter leaves the ground.
Everyone was about to applaud, but the helicopter's rotors vibrated strangely, and then it fell sideways.
The factory director said: "Press the rod sideways in the opposite direction."
Dong Qingjun didn't understand either, so he blindly guessed that he was probably trying to deflect the rotor in the direction of tilting, so as to pull the helicopter back.
The operator yelled: "Pressed."
The factory director said: "It's useless, just stop it."
The operator pressed stop in a hurry.
The helicopter fell down and its rotors hit the ground with a loud "kak-kak-kak" sound.
Stopped.
The leaves were all destroyed.
Everyone was covered in cold sweat.
The recorder said: "On July 10, 1993, at 8:03 in the morning, the first test flight of helicopter model No. 1 ended, and it rolled over and crashed."
Dong Qingjun laughed like a goose: "It flew for three minutes, not bad, not bad."
The factory director rolled his eyes at him.
Dong Qingjun said: "Tsk, don't try it in such a hard place next time. Find a piece of grass or a rice field."
The factory director said: "The take-off ground is uneven, making it easier to tip over."
Dong Qingjun said: "I don't think it's a problem with the ground. Don't you think it's top-heavy?"
The factory director frowned and thought for a while. In fact, they had measured gravity, but the weight of the parts made by scaling them down was reduced proportionally.
However, the control torque of the rotor is not reduced proportionally.
Rotating rotors on the same plane can only rotate in one direction. If the control moment is large relative to the center of gravity, it will roll over toward the direction of rotational inertia.
To put it bluntly, the center of gravity is too high and too light.
The factory director comforted everyone: "It doesn't matter. This is our first time, and we will improve it when we find problems. Wenjun Automobile's first car had to be built in three or four versions before it could run normally."
He was making a pun, telling Dong Qingjun not to be so proud.
Dong Qingjun said: "When will you change things, I'll come back to see you."
The factory director said vaguely: "Very soon, very soon."
What I was thinking was: Bastard, please stop coming.
Dong Qingjun went to the university library to look up information after coming out of the aircraft factory.
Then I went there for a few days.
-----
The director of the aircraft factory originally wanted to modify it and secretly test it without telling Dong Qingjun.
But after Dong Qingjun checked the information, he stayed here every day and couldn't hide it at all.
At this moment, everyone was standing on the tarmac as they were that day, surrounding the modified helicopter.
The factory director nodded to the operator: "Let's get started."
The recorder said: "On July 18, 1993, at 8:01 in the morning, the No. 1 helicopter model made its second test flight."
The operator presses the button.
The helicopter's rotors spun.
The factory director said: "Take off."
The operator pulled up, and the helicopter rose crookedly, and then... drifted away on its own, towards the river.
The factory manager shouted: "Ah! What's going on? Let it come back quickly."
Operator: "I can't help it, it doesn't listen to me."
Factory Director: "Close it. Close it quickly."
Operator: "It's closed."
The rotor speed slowed down, and the helicopter almost came to a halt by the river.
If you fly ten centimeters further to the side, you will fall into the river.
The rotor also stopped rotating, and the helicopter slowly straightened back.
