Chapter 158: Dongchuan County

No one knew how far Su You's thoughts drifted, but they felt that he was a little inexplicable.

But then things were different, and he and Chen Wei had a disagreement about making a bow, and the two began to bet on whether they could make a crossbow without a crossbow arm with elastic power.

This bet was worth five times, so when the next day was on the boat, Su You led a group of people to drum.

In fact, there is still elasticity, but the principle of torsion spring used, this baby is bullying Chen Daxia does not understand.

The elastic force is actually provided by the rope, and the bow arm is a cross arm that can be rotated in the middle of a wooden post.

Tie a few strands of rope on the wooden post, hang down loosely, and then fix it at the bottom of the wooden post, and then turn the cross arm in the middle, the cross arm moves and the wooden post does not move, and the rope will be carried to the wooden post tighter and tighter.

When it gets tight enough and as soon as you let go, the cross arm bounces back in the opposite direction of rotation, which provides energy.

The principle is like this, the two cross arms are done, the right arm is cured clockwise, the left arm is wound counterclockwise, and the last few native soldiers push the cross arm fiercely, and the stone is hung on the end of the two arms with a string made of thick ropes, and in the middle is a small copper bowl with a tail, plus a guide rail, this thing can be used to launch a fist-sized stone bullet.

Next, a piece of rope was drawn from the tail behind the copper bowl to make a rope buckle, and hung on the towing hook, and the two native soldiers vigorously turned the winch at the tail of the guide rail, and in the creaking sound of the bow arm moving backwards, and the click of the ratchet at the bottom of the winch, the rope buckle was slowly pulled by the towing hook to the teeth of the crossbow machine and hung up.

In fact, there are several trigger structures of the crossbow machine, not only the style of the pre-Qin, for example, the patented structure of the foreign microtechnology company used by Su You, which is more lightweight.

In the same way, if you want to do it, you have to do it decently, not only with a ruler to look at the mountain, but also with a thin wooden stick sticking out of the front end of the giant crossbow, which is the auxiliary aiming structure used on the recurve bow in later sports competitions.

This thing, born from the design of scholars in the Greek city-states, should be officially called the ballista.

It is quite powerful, and the length of the two cross arms and the adult arms is similar, and it is thicker.

Add a base at the bottom that rotates horizontally, and a table and a bolt to adjust the elevation and depression angles, and the ballista is complete.

The ballista was mounted slightly before the middle of the left chord of the ship, and the position here was the most stable position of the hull.

Chen Wei has completely disregarded the win or loss of Bopu, and he is now bent on becoming a starting lineup.

Su You carefully measured the safe range and drew the area where the crossbow arm rotated wildly when the crossbow string was broken.

In the future, once wound, this area is a forbidden area.

The ballista's center of gravity is also very delicately designed, with a counterweight at the tail, which can now be adjusted so that the overall center of gravity falls just on the base, so that the rotation is effortless.

Chen Yu stood behind the ballista, aiming at a stone on the river beach in high spirits. The crossbow machine was pulled.

With a loud bang, some tiny sawdust on the ballista was shaken into the air, and the tail of the copper bowl was attached to the rail, and the stone projectile was ejected with a trajectory that was nearly linear and a speed almost invisible to the naked eye.

With a snap, the stone projectile swept high over the boulders on the riverbank, and finally hit one target, a cypress tree with a small leg on the hillside on the bank.

The cypress tree began to shake slowly, and then it slanted and fell to one side, breaking directly into two.

Shi Tong's eyebrows danced: "Good equipment!" Good head! ”

Chen Yu was dumbfounded: "I aimed at the stones on the river beach, and deliberately raised some angles, and the ghost knows that the stone bullets run out in almost a straight line!" ”

Ah Homi has always only been messing around with his younger brother, but now he suddenly pounced on the ballista, and his shoulder hit Chen Yu: "Stinky scholar go away!" Hugh has to touch my baby! ”

Su You said with a smile: "Sister, come back soon, if you are an instrument, there is a risk of operation, and these are the soldiers' affairs." ”

Ah Homi didn't let go: "Quickly fill up and play the string, I'll try it too, hahaha What am I still afraid of now?" Just their little broken ships, come one and I'll destroy the other! ”

That night, Shi Tong came to Su You's side, bowed down and said, "Master, what ...... The ballista is a heavy weapon of the militaristic state, and it will be a little inappropriate to hand it over to the Yi people? ”

Su You smiled: "What kind of militaristic heavy weapon is that?" When you go back, replace the hemp rope with a steel thick spring to ensure that the torque of the two arms is consistent, the shape is twice as horizontal, and the base and pitch angle are added to the angle ruler, so that the mountain is more accurate, and the most suitable weight of the stone bullet is calculated, and even replaced with lead bullet and javelin. On weekdays, it can be disassembled, dragged around by a horse-drawn cart, and finally made a shooting parameter table. That's barely a militaristic weapon. ”

After speaking, he pouted: "Right now, it's just shoddy." ”

Su You looked down on it, it didn't mean that Ah Homi looked down on it, three days later, on both sides of the big ship, three ballistas on one side, like mighty soldiers, stood up.

Really be a baby, send local soldiers to clean up every day, brush tung oil, and cover it with a cloth cover after finishing, leaving only one to play by yourself, and by the way to train the soldiers.

Su You received Chen Yu's money, in addition to reading in the cabin these days, he was pondering the ballista operation regulations, the young lady was more barbaric, and she was big and discouraged, and she didn't listen to persuasion, so she had to become a military order, and let her pay attention to leading by example.

After all, she is a general, so she can only be put on a decree.

The current camp does not dare to face the big boat, Ah Ho Blazing Fire will either arrange the camp in the upstream of the big boat, or arrange it downstream, and also in a relatively far away position, to Ah Ho Mi to prop up a bamboo mat, and the rattan shield as a target.

No one likes to be at a barbecue when a stone bullet swoops through the air not far overhead, and then listens to it hit the rocks and shatter with a snap.

With a shake of my heart, a cup of precious Yongchun dew is gone, okay?!

The wilderness on the waterway gradually passed, and the river thieves at the junction of wilderness and civilization gritted their teeth in anger.

This group of water rats seemed to be able to foresee the danger, and they all hid, and there was no danger all the way.

Villages, peasants, and buffalo began to appear on both sides of the riverbank, and the clear song of the maiden and the flute of the shepherd boy appeared.

On this day, the big ship arrived at the first big city after entering Dali - Dongchuan County.

This is a city that can be compared to Qingshen County in terms of prosperity, Chen Wei is ashamed of his ignorance, and people are not wild places.

Ah Homi came out of the cabin, and Chen Yu was suddenly shocked: "You, you, you...... How can you wear the left side! ”

Ah Homi was inexplicable, but Mr. Fan couldn't stand it: "You are really confused in the next life, the lord is the beloved daughter of the big ghost of the Erlin Department, and the general in the imperial court must not be rude!" ”

Chen Yu retreated to the side in despair: "It turns out that the girl is not Han ......"

Su You shouted: "Brother Ji Chang is cautious! My sister is a Song person from my Great Song Dynasty! ”

Ah Mi didn't care about this, anyway, she didn't look down on this weird scholar, so she had to take Su You into the city to sell things.

Su You is still a little embarrassed, sister, this should be the trade secret of your second forest department, right?

Ah Mi glared: "How much did you sell the bronze ware of our Erlin Department, when we don't know?" What are you doing with such a small belly?! ”

Well, you're a general, and everything you say makes sense! You're not afraid of me, I'm afraid of a fart?!

The street is a narrow stone road, on both sides are wooden and green tile buildings, along the street are paved, women dress plainly, men dress fancy, rich people wear colored silk or kapok clothes, the cuffs and skirts are all small squares, the same wide robe and wide sleeves, like a butterfly.

They also wore black gauze hats, but the gauze hats were very tall and special, and they did not look like the shape of two lotus petals closed, which was very similar to the crown of the later popes; If it weren't like the magnolia flower shape, there was a bud in the middle, and there were four petals turned outward, and the petals were also edged with colorful brocade.

Whether it is a poor person or a rich person, on the neck or in the hand, there are hanging Buddha beads, the general is an ordinary tree seed wood beads, rich people, in addition to the pearl jade, a lot of hanging on the neck of a hoard, jade porcelain 108 sons plus three Buddha heads, Ruyi knot disciple beads, obviously the most fashionable jewelry.

Ah Homi led Su You to the front, flanked by the warriors of Jingjie, followed by Shi Tong, Chen Yu, Mr. Fan, Chaogu and others.

Su You was most interested in the prices of goods in various places, and asked all the way.