When Wang Chuan returned to the tribe, the most unhappy people should be those children who were as old as him. Pen, fun, pavilion www. biquge。 infoStudying in the morning and evening is a burden for most people. Disgust with school or something, ancient and modern. When Wang Chuan was away, they also attended classes under the teaching of the spirit. However, the spirit only has half a bucket of water, and it is not enough for oneself, so when teaching, it seems that it is a little powerless, and many times it is just a review. As a result, everyone is less stressed.

But Wang Chuan will not be like this. He understands almost everything, and his patience is not very good. Many times, if someone is not paying attention and does not remember what he says, he will often go straight to the rattan, which is really miserable.

Fortunately, Wang Chuan has too many things to do these days, so he doesn't check their homework much, otherwise they will have to be even more sad.

The black back was still recuperating and hesitating, so Wang Chuan got a bunch of animal skins for Wang Fan, and asked him to go to the river to try out the sail first. People always know what works after trying it. When he hits a wall for a while, when Wang Chuan proposes the concept of making sailboats, Wang Fan should understand it much faster.

Wang Chuan has been running on both sides of the blacksmith and the carpentry room for the past two days. He had to make the wheelbarrow first. And to make wheels, it is better to have a saw first.

The saw is the easiest to do by casting the front of the edge. But there's no way to get molten iron right now. Wang Chuan had thought about making steel in a small blast furnace, but if he wanted to make a small blast furnace, a whole set of production processes would be brought down, and so many people in the iron room would not be able to play it. There are too many people in the iron room, and the other people will be overstretched. So, let's settle for it first.

Without molten iron casting, Wang Chuan could only use the primitive forging method to make long and uniform iron bars, and then on the side of the front edge, he used a sharp axe to chisel hard to break the serrations.

Because the amount of fused charcoal is difficult to control, the degree of tempering is also different, and some of the axes produced in the past six months are particularly sharp and hard. Broken teeth used such an axe.

In this way, after the sawtooth is broken, the sawtooth is just staggered, and it can be used directly without additional modification and polishing.

This kind of saw is naturally incomparable with those elaborate hacksaws of later generations. Still, it's a great tool in this day and age. From the half-meter-diameter golden silk nanmu, a piece of seven or eight centimeters thick can be cut off in half a day. Draw a circle with a crude compass for coring, round the outside, and make an arm-sized hole in the middle, and a primitive wheel is ready.

Wang Chuan didn't plan to use a little iron on the wheelbarrow. It is better to use iron on a wheelbarrow than to sell iron directly. So the axles are also made of wood. Make the hardwood arm thick, about 20 centimeters long, and polish it smoothly to count the axle. It should be no problem to top a few hundred pounds of such a thick axle.

Two more than ten centimeters thick two meters long wooden roots nailed into a trapezoidal shape that is narrow in front and wide in the back, the place where the axle is installed is thicker, the axle is installed after slotting, and the axle is nailed with thick bamboo nails, and then tied with hemp rope to fix and limit the direction of the wheel, which is considered a unicycle.

There must be a lot of problems with such unicycles. The first car was made to be used as a toy for children, and by the way, the performance of this car was tested. Children of all sizes push small cars, no less enthusiastic than playing skiing in winter. Everyone wants to push for a while, everyone wants to go up and sit for a while. A bunch of children whizzed around the fence, followed by a mischievous baby elephant and a reckless little rhinoceros, which made the tribe jump.

Sure enough, it only took half a day for all kinds of problems to come out. The wheels will scrape the person sitting on the car, the car is too low and it is too difficult to start, the direction of the wheels is easy to deviate, and the axle nails are not firm and will loosen......

If you find a problem, you can fix it in time. The wheels will scrape, so nail the baffle behind the wheels. If it's too difficult to start, then attach two wooden stakes under the handle to raise the body, plus a leather shoulder strap. The direction of the wheels is easy to deviate, so install the hubs on both sides of the wheels. The axle will be loose, so you can only deepen the groove, first glue it with fish glue, and then nail it with bamboo nails......

In Wang Chuan's view, these are small problems, and what he wants to know is how strong such axles and wheels are, and whether such things as bamboo nails can withstand heavy loads and long-distance tests.

The next day, three trucks were made out and pushed by the tribesmen to the salt mines to transport salt ore. When adults deal with new things, they are not yet as open as children. These people looked at this strange "high technology", looked at it and touched it, but they didn't dare to push it up. It turned out that it was the children who demonstrated it, and they realized that it was used to push things.

This kind of experiment, Wang Chuan personally followed is the best. But now the tiger exorcist doesn't know if it's still nearby. The black back can't say why. Wang Chuan still didn't dare to take it lightly. Grandma was even more worried about Wang Chuan going out, and now she had to send someone every half hour to see where he was. The rest of the team carried a drum on their backs in case of a tiger attack and used to disperse the tigers.

Three cars went out and came back with three. This made Wang Chuan's confidence in bamboo nails increase a lot. At least the cars didn't fall apart.

The people of the tribe were also very happy, and three carts brought back the salt ore on the backs of ten people. That's pretty much what the other dozen or so people in the team are carrying. Get a few more cars and walk for a few days, won't the tribe have all the salt to eat for a year?

The tribesmen realized the benefits of the cart. The teams clamored for this kind of car to help carry the weight, saying that with this, they could get more things back. Just to meet the needs of these people, I am afraid that twenty or thirty cars will have to be made.

Wang Chuan carefully inspected the car and found that there was no problem with the axle with thick arms. After dripping with grease, there is no trace of friction, and it is estimated that it can be used for a long time. But the wheels don't. The car with the most weight showed subtle cracks in the wheels.

The tree grows vertically, and its force surface is also in the vertical direction. The cut wood chips are subjected to transverse force, so they are easy to crack, even if it is a relatively strong golden silk nanmu. It seems that in order to make a sturdy car, the wheels cannot be done in such a simple way.

Roasting wood with fire can make it deform Wang Chuan knows. Wooden straight rope, I thought that the wheel was like this.

Wang Chuan first asked Lambla to make a large carpentry bench out of iron nails and thick wooden stakes. Nail a fixed stake on it for clamping. Then I found wood with a well-proportioned wood and no knots, and cut it into a board six centimeters thick, ten centimeters wide, and one meter and eight long. After the board is heated over the fire, it is placed on a wooden bench and bent little by little using the lever principle until it forms a circle.

Once the wood is roasted and bent, it will not change its shape as long as it cools naturally. As a result, the wheels will no longer be deformed.

The part of the interface is chiseled out of the bite butt, and then glued with fish glue and fixed with bamboo nails. After the joints are closed, the circle is drawn with a compass and the outer circle is trimmed with a planer. Chisel some more tooth marks to increase friction. Such a wheel frame is basically ready.

The middle of the wheel passes through the hub of the axle, and a ring is made of thicker planks. The middle ring should be round enough and polished smooth.

The spokes between the rim and the hub are used by Wang Chuan with several wooden planks three centimeters thick. The fine spokes are complex in workmanship and difficult to install. Wooden planks are much easier to install as spokes. As long as there are a few notches on the inside of the rim and on the outside of the hub, and then the board is glued with fish glue first, and then nailed with bamboo nails. The stress surface of the plank is large, and it is not easy to break.

With such a wheel ready, install it on the unicycle, or let the kids go about playing for a day. This time there will be no problem. Push this wheelbarrow and the first few for the tribesmen to use. Ten days later, after a rain soak, the wheels of one of the front tricycles were completely scrapped. The other two also showed cracks of varying degrees, and it didn't seem to take more than a few days. But there is basically no problem with this one, and if it is used properly, I am afraid that it can be used for a year or two.

Since the wheels made by this method are easy to use, let's produce them all. The assembly line and standardized production are now fully mastered. The next unicycle produced will be produced by assembly line and standardized methods. All the parts are the same size, the process is the same, and the unicycle is almost the same.

In the blink of an eye, the next bazaar arrived. Wang Chuan had seven wheelbarrows pushed to the market to sell. Two of them were promised to be sold to Winter Bear, and the rest were auctioned. I don't know what the response will be this time. Such a car, even if they want to, they can't imitate it, right? (To be continued.) )