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 when discussing the making of the bow, and the two began to bet on whether they could make crossbows without the need for elastic bow arms.

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 attached to a wooden post.

Tie a few strands of rope loosely at the upper and lower ends of the post, and then turn the middle arm to bring the rope tighter and tighter up and down the post.

When it is tight enough to let go, the two cross arms will bounce back in the opposite direction of rotation, which provides energy.

The principle is like this, the two cross arms are done and tightened, the two native soldiers push the cross arms fiercely, and the stone is hung with a string made of thick rope at the end of the arm, 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 projectile.

Next, a section of rope is drawn back on both sides of the net pocket to make a rope buckle, which is hung on the towing hook, and the two native soldiers vigorously rotate the winch at the tail of the guide rail, and in the creaking sound of the bow arm backwards, and the click of the one-way ratchet, the rope buckle is 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 rod sticking out of the front end of the ballista, which is an auxiliary aiming tool for recurve bows in later sports competitions.

The current thing was actually born from the design of scholars in the Greek city-states, and the official name should be the ballista.

It is quite powerful, as tall as an adult, and the two horizontal arms are similar to the length of an adult's arm, and they are 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 safety range, and drew the safety range where the crossbow string was broken, and the crossbow arm would not hurt people if it rotated wildly.

In the future, once winded, this area is off-limits.

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 attached to the rail, pushing the stone projectile out in an almost straight trajectory and a speed that was 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 in the Shama Department?" 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 and towed in a horse-drawn carriage. Finally, a table of shooting parameters was made. That's barely a militaristic artifact. ”

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 five yuan from Chen Yu, and in the past few days, she has been pondering the operation rules of the ballista in the cabin, the young lady is more barbaric, and she is big and big, and she does not listen to persuasion, but when it becomes a military order, she pays 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 predict the danger, and they all hid all the way without danger.

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 all paved, women dress plainly, men dress fancy, rich people wear colorful silk clothes, cuffs and skirts are all small squares, the same wide robes and embroidery, like a butterfly.

They also wear black gauze hats, but the gauze hats are very special, they don't look like the shape of two lotus petals together, or they don't look like the magnolia flower shape, with flower buds in the middle, and four petals turned outward, and the petals are also edged with colorful brocade.

Whether it is a poor person or a rich person, on the neck or in the hand, there are a string of 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, one hundred and eight sons plus three Buddha heads, wishful knot disciple beads, is obviously the most fashionable and trendy 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.