Zhang Yan had no idea how difficult it was to make a pulley, so when the first wooden pulley weighing ten kilograms appeared in front of him, he did not dislike it. Instead, he took a closer look at the structure and found that it was much larger.
Other than that, it's basically not much different from the sketch he drew.
After the structure is determined, the size needs to be further improved. After all, the most basic use of the pulley is to serve as a support point for "fixation" and "directional movement". It should not be too big or too heavy, and it should also match the things above and below the bridge.
Only then.
Zhang Yan didn't think about steel ropes, which required extremely high craftsmanship. Hemp ropes as thick as an arm could be used as a substitute.
After several repeated modifications, a pulley box weighing five kilograms, moderate in size, and made of a mixed structure of wood and iron was made. After many suspension and sliding experiments in the station, it basically reached the optimal level.
What Yan expected.
Everyone in the Yubei Mountain Fortress is already familiar with Madman Zhang’s crazy words and weird behavior. Coupled with the appearance of the Bagua array and the Kongming Lantern, everyone has a little more respect for this madman. Although they don’t know that he is wandering around all day long.
What was it, but they all had a tacit understanding and didn't bother to talk too much.
Until the day when Zhang Yan was ready to officially let Pulley meet with the top management of Yubei Mountain Fortress.
The place was chosen in a Yushan fruit forest. In addition to Lin Zedong, everyone in the fortress who could spare time was present. Even the general Song Qinghe came in person.
This was the first time that Zhang Yan met the leader of Yubei Mountain Fortress. Zhang Yan felt that the person in charge was not like a general, but more like a teacher. Even though he had the powerful pressure of a warrior, he also had a kind of calmness.
Feng Qing's affinity is stronger.
"My subordinates see you, general!" Zhang Yan quickly followed the rules here and saluted Song Qinghe honestly. He did not expect that Song Qinghe would come in person.
"Haha, no need to be polite. Zhang Yan, I heard that you tinkered with another interesting thing. I happened to have some free time, so I came over with Lin Zedong to take a look. This thing is what you repeatedly asked the supply camp to help you get.
What kind of pulley is that, right?”
"Yes, sir, thanks to the manager of the transport camp this time, otherwise this thing wouldn't have been produced so quickly." Zhang Yan never fails to push things along. As he spoke, he looked at Song Qinghe, who was standing behind him, with a smile on his face.
The blossoming baggage camp handed over the top three commanders to express their thanks.
Song Qinghe also turned to look at Ma Sanqiang, smiled, and continued to say to Zhang Yan: "I didn't know the purpose of the pulley you made before, but now it seems that it is a method prepared for the Yushan fruit trees? Can you tell me?
"
"Sir, in fact, the pulley is an auxiliary. The purpose is to allow a faster method of moving things to be implemented on Yubei Mountain. It is difficult to explain in words. Since you are here, let's take a look at the actual effect. It will be easier to understand.
."
"Okay, let's see what changes this pulley can bring to Yubei Mountain."
It's just a single pulley, not a pulley set, so the revolutionary nature of this thing has not been demonstrated right now. Zhang Yan doesn't need it to do anything disruptive at the moment. He just needs it to make transporting Yushan fruits simple.
"It's up to you, sir." After saying that, Zhang Yan waved his hands, and a group of people who were ready next to him began to move.
The people who cooperated with Zhang Yan were Lin Zedong's Youtanqi personal guards. These people were already familiar with Zhang Yan, and they knew that this seemingly crazy person was actually a very powerful geek. Even they didn't
I have seen the final use of the pulley, but after many experiments, I can guess a thing or two. Now that so many senior officials of Yubei Mountain Fortress are here, they have also raised their chests, and it is definitely a blessing to be able to participate in this matter.
A long-standing thing.
Then more than a dozen of Lin Zedong's personal guards began to set up with a bundle of arm-thick hemp ropes. One end was tied to a huge Yushan fruit tree that was almost hugged by two people, and the other personal guard was holding the large Yushan fruit tree.
The hemp rope began to climb down the mountain. After a few ups and downs, it reached more than ten feet below. Then it also found a strong tree and tied the other end. Then it repeatedly pulled the hemp rope lower to form a
Step-like appearance.
"Sir, I call this a hanging basket. It is used with pulleys. It is actually an ordinary bamboo basket with a rope that can be hooked." After Zhang Yan waited for the hemp rope to be arranged, he looked at the angle.
It was very steep, almost as expected when I visited the site before. Then I took out a bamboo basket with a capacity of fifty kilograms and the made pulley box. They simply combined the two phases and hung them on the hemp rope bridge.
After loading the Yushan fruit into the basket, Zhang Yan turned to look at Song Qinghe and said, "Sir, please take a look, this is the purpose of the pulley." After saying that, he pushed hard, and a basket of fifty kilograms of Yushan fruit moved along due to the pulley.
As the rope bridge slides, coupled with the inclination of the rope bridge itself, the speed of the decline becomes faster and faster, but after reaching a certain speed, the speed of the decline seems to be slowed down by something. According to a method, although it is fast, it is still slow.
Slide to the first "step" at a controlled speed.
Then the guard on the first "step" quickly removed the basket, hung it on the second descending rope bridge and continued to repeat the above actions...
"Sir, as you can see, this is the purpose of the pulley. Not only can it make the heavy objects slide more smoothly on the rope bridge without slipping, but it can also control the sliding speed within a range so that it does not lose control and is difficult to pick up.
.
According to this transportation speed, it can be easier to pick and transport, and the role of the sentry can be utilized to the maximum extent. It can also achieve the purpose of speeding up the "harvest"."
Zhang Yan didn't say much. The reality was right in front of him. The spreader equipped with pulleys could quickly transport heavy objects to low places under controllable conditions, ignoring obstacles in the middle and directly shortening the transportation time to
In the past, it was 20% or even 10%. In this way, all the manpower freed up during the transportation process can be used to pick Yushan fruits. Wouldn't it have achieved the so-called "rush to harvest" purpose.
The result is pretty much what Zhang Yan expected. The next step is probably to adjust the tension of the pulley, or add a rope bridge for safety and stability. These are simple and do not require much effort.
Although he had heard some speculations beforehand, when he saw with his own eyes that a small pulley could make the rugged mountain road so easy, Song Qinghe was still shocked from ear to ear.
No one has thought about using a rope bridge to slide down the Yushan fruit before, but the speed of the slide is too fast and it is impossible to catch it steadily. It may even cause great damage to the fruit and cause it to rot. The gain is not worth the loss, so it is
This method was abandoned.
"What a pulley! The impossible becomes possible! The methods of the Xue Xue family are indeed wonderful!"