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 looked at the structure carefully and found that besides being much larger Other than that, it's basically not much different from the sketch he drew.
After the structure is determined, further improvements in dimensions are needed. After all, the most basic purpose 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 must match the things above and below the bridge.
Zhang Yan didn't think about steel ropes, which require 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, of medium size, with a mixed structure of wood and iron was made. After many suspension and sliding experiments in the station, it basically reached the optimal level. The appearance that Yan expected.
The Yubei Mountain Fortress is no stranger to Madman Zhang's crazy words and weird behavior. Coupled with the appearance of the Bagua array and the Kongming Lantern, everyone had a little more respect for this madman. Although I didn't know what he was talking about all day long, they had a tacit understanding and didn't bother him 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 Zhang Yan met the person in charge of Yubei Mountain Fortress. Zhang Yan felt that the other person was not like a general, but more like a teacher. Even though he had the powerful pressure of a warrior, he also had a calm and gentle affinity.
"My subordinates see you, general!" Zhang Yan quickly followed the rules here and saluted Song Qinghe honestly. He didn't expect Song Qinghe to come in person.
"Haha, no need to be polite. Zhang Yan, I heard that you have tinkered with another interesting thing. I happened to follow Lin Zedong over here to take a look when I had time. This thing is what you repeatedly asked the supply camp to help you get. That’s a pulley, right?”
"Yes, sir, it's 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 three strongest horses and thanked them.
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, actually the pulley is an auxiliary. The purpose is to enable a faster method of moving things on Yubei Mountain. It is more troublesome 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 manpower that cooperated with Zhang Yan was Lin Zedong's Youtanqi bodyguard. These people were already familiar with Zhang Yan, and they knew that this seemingly crazy person was actually a very powerful geek. Even if they have never seen the final use of the pulley, they can guess something about it after many experiments. Nowadays, so many senior officials of Yubei Mountain Fortress are here, and they have raised their chests. Being able to participate in this matter is definitely a shameless thing.
Then they saw more than ten of Lin Zedong's personal guards starting to arrange a bundle of hemp ropes as thick as an arm. 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, the hemp rope is repeatedly pulled lower to form a ladder-like appearance.
"Sir, my subordinates 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's very steep, just as expected when we visited the site before. Then he took out a bamboo basket with a capacity of fifty kilograms and the made pulley box. They simply combined the two 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 watch, this is the purpose of the pulley." After saying that, he pushed hard, and a basket of fifty kilograms of Yushan fruit moved along the road 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 maximized. It can also achieve the purpose of accelerating "grabbing" from the side. "
Zhang Yan didn't say much. The reality was in front of him. The spreader equipped with pulleys can 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 results were almost as expected by Zhang Yan. 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 don’t 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 Zaxue lineage are really wonderful!"
