Doomsday: Humanity shrinks 100 times

Chapter 141 Winch
The five people stood on a tall plant blade. Walking forward was the entrance to the tributary. There was a lot of silt on the ground and the sound of flowing water could be heard.

There are no channels on either side of the river leading to the forest area, but the water flow is not large, so it should be strictly speaking a stream.

This tributary was probably deliberately opened up to provide water to the forest area, and it is unknown where its downstream leads.

"From here you can see the river interceptor over there."

Liu Rui pointed forward.

Lu Yuning nodded, and could already see the river and a pile of garbage at the entrance.

The most eye-catching thing is a glass bottle blocking the middle of the river, which looks like a white wine bottle.

"There's a lot of silt ahead, so to be safe we should make a road to go straight through." Lu Yuning looked at the surrounding environment.

The five of them climbed down again along the tall weeds.

The area was extremely damp, and the smell of dirt and mold was everywhere.

The only thing that can be confirmed to be useful at the moment is the glass bottle.

If Lu Yuning could control glass, glass would be more suitable for making windows than plastic.

In addition, glass is also a more suitable material for making hot air engines, mainly because its surface is smoother, the friction is smaller, and the piston inside is more airtight.

However, the hardness of glass is relatively high, and I don’t know if it can be collected. Moreover, Lu Yuning is not sure whether the glass can be reassembled after being shattered.

His special ability should be manipulation at the molecular level. Based on this principle, there should be no problem.

However, Lu Yuning was actually more concerned about what was inside the glass bottle. The bottle had a lid, so it did not sink.

If there was any leftover wine in there, they had alcohol to use.

Alcohol is mainly used as a thermometer.

Although I initially wanted to use water as the temperature sensing device, it would be better if there was alcohol.

In addition to this glass bottle, there are more plastic bags, which are also common household waste.

The current problem is how to get the glass bottle up.

Or just dissolve it in water? But then you might not be able to get rid of the residual alcohol.

Lu Yuning looked at the surrounding terrain, frowned, and finally came up with an idea.

"What do you mean?" Wu Xiao was very familiar with Lu Yuning. Seeing his expression, he knew that he had something on his mind, so he asked.

"I want to fish this bottle to the shore so it can be handled more easily," Lu Yuning explained.

"I don't think the five of us can pull it?"

"Well, it's a bit difficult to rely on manpower alone. I'm thinking of building a winch nearby. There might be more garbage piled up here in the future, so I think it could be developed."

"winch?"

"Well, use pulleys, levers, and ropes to make a labor-saving mechanical device."

Several people seemed to be thinking about something.

The bottle was too big for them, and even if it was in the water, it would be extremely difficult to drag it out.

But Lu Yuning still planned to give it a try.

Having made up his mind, Lu Yuning began to make the winch.

After being reduced in size, the winch cannot be designed and manufactured using normal thinking.

If they make it according to their current perspective, the thing they make will only be a few millimeters. It is nothing but a pipe dream to want to use such a small thing to pull a glass bottle as big as a mountain.

So it must be very large after it is made, at least several times the size of their body.

However, Zhang Xinyue is not here now, so we can only roughly estimate how big it will be.

The main difficulty of the winch is the pulley and the lock. The problem with the pulley is that the friction with the shaft must be small, so the entire pulley assembly must be as smooth as possible.

The edge of the pulley should be made into a gear shape so that it can lock the reverse force in conjunction with the lock.

So this part has to be made of metal.

Fortunately, they had made preparations in advance and placed a lot of aluminum in Wu Xiao's space.

As for the lock, it is mainly a spring device, and the requirement is that it must have sufficient load-bearing capacity.

Finally, the lever arm should be made longer and the force requirement should be smaller.

This little thing needs a support point because it has to resist the force of the wine bottle.

There happened to be a tree nearby, and Lu Yuning decided to dig a groove in the trunk and fix the winch directly inside.

In this case, the hand-cranked device of the winch must also be changed into something similar to a steering wheel.

After all, the winch is several times larger than them and cannot be cranked by hand like normal.

And in the end they might have to use gravitational potential energy to turn the winch, otherwise the five of them might not be able to turn it.

The amount of force a hand winch can generate depends on its gear ratio number.

However, even so, due to their current process precision issues, friction problems when changing wheels are inevitable.

So it is possible that their strength cannot even overcome this friction.

However, Lu Yuning also thought about this problem. If it really doesn't work, she can use Wu Xiao's space.

Find a similar heavy object and use gravity to turn the winch. Of course, this is extremely inefficient, but there is no better way.

The device was quickly made. After a few people tried it, it was still able to rotate. However, the friction force was related to the force conditions. No heavy objects had been connected yet, so it was impossible to know whether it could be pulled by manpower. But at least the device itself could be used normally.

Now that the winch is done, the next step is to put the rope around the glass bottle.

Only Lu Yuning can do this.

Because it is in the middle of the river, people have to walk along the river interceptor and go down to the horizontal surface, which is a relatively dangerous process.

The river was about two to three meters away from their current position.

Lu Yuning first made a passage and came to the river, and the four people followed.

The river is now right in front of you, although in fact it is only a small branch of the river.

But at this moment, it still appeared before their eyes like a river.

Fortunately, the river is not too turbulent.

The waste pile blocked by the river interceptor finally appeared clearly in front of the few people.

"That looks like a slipper?" someone said.

"Plastic" Lu Yuning silently disassembled the garbage into usable materials

"Is that a bag of instant noodles over there?" Someone else found something in a pile of plastic garbage.

"It seems like it should just be an empty bag. I'm a little greedy. It used to be ignored, but now it's hard to get." Someone complained.

Lu Yuning felt a little amused, but this was just a luxury. He couldn't expect to pick up a few packets of instant noodles from the garbage in the river.

While I was thinking, I heard someone speak again.

"Huh? Is there something in there?"

Lu Yuning pulled herself back to her senses and looked in the direction Wu Xiao was looking. A square plastic package was constantly floating up and down next to the plastic package of instant noodles.

Most importantly, it looks intact.

(End of this chapter)