Shenkeng system

Chapter 27
I was busy alone until the evening, and I only took some time to eat some dry food and drink some rice wine.In the evening, a large pile of black powder was finally piled up on the dry stone slabs of the warehouse. In order to absorb water and keep the gunpowder dry, Zhao Si even got some quicklime and piled it around the house.

Everything that the blacksmith had cast was ready and sent over with a few servants, just two pulley blocks that could be attached to a hard bow, and a pile of very rough cast iron cans.After Zhao Si's design, once these two pulley blocks are installed on the three-stone hard bow, it should save a lot of effort.

However, the blacksmith's level of craftsmanship is very limited now, and the pulley blocks produced are very rough, and after polishing, they are barely usable.

However, after the pulley block was installed with great effort, Zhao Si found that there was almost no labor-saving effect!
What the hell?This is really a slap in the face.I have already boasted Haikou in front of Zhu Gui and everyone, saying that a person who can draw one stone and multiple bows can draw about three stones with his improved bow.

But now I try to pull the bow in front of me. It's a little difficult to pull at first, but of course there is no problem in pulling it open.After the bow is fully drawn, it becomes easier and easier.Even so, the transformation of this bow failed!

In order to imbue Ling Bo with micro-stepping skills, his body must have undergone a systematic transformation. After that night, he was actually so powerful that he could easily defeat Jiao Erpi by wrestling his wrists.If this is the case for pulling the bow now, how can ordinary people do it?How can ordinary people have such strength?

What's the use of being easy after pulling it apart, if you can pull it off, you can pull it off, if you can't pull it off, you can't pull it off!

It seems that there was an oversight in a certain step!Zhao Si then carefully studied the pulley block in front of him.This pulley block was modified according to the model of a compound bow based on the memory of his previous life. He then studied and calculated it, only to find that when the bow is opened, the fixed pulley first works. Pull up the limbs with one wheel, one set of strings with one cam, and two sets of strings with two cams - this is used to synchronize the stroke of the upper and lower wheels.At this time, the function of the fixed pulley is only to change the direction of the force, turning the force of pulling the string back into the force of pulling the bow limb up and down.This process is not labor-saving.

When the bow is pulled to the peak, the fixed pulley becomes a movable pulley when the bow is bent, and part of the force is relieved from the bending of the bow.If there is no bow limb, the fixed pulley will not become a movable pulley, but because of the existence of the bow limb, the physical properties of the movable pulley are reduced.That is to say, for a three-stone bow, the labor-saving ratio after installing the wheel set is 70.00%, so you need to use at least three stones to pull the bow past its peak, and the force will suddenly drop to one stone after passing the peak.

Zhao Si designed it for a long time, and after a lot of messing around, the three-stone bow saved only one stone after pulling it apart!This means little to ordinary soldiers.

He was a little frustrated, and didn't know how to explain it to Zhu Gui and others!The only thing that can be done now is to add a cross arm for drawing the string to the bow, install a double crank at the end of the cross arm, and use the lever and labor-saving principle of the wheel shaft to shake the double crank, tighten the stay wire, and pull the bowstring.

But when this thing is installed, it is a bulky crossbow, not a bow!
Zhao Si started to be in a daze, thinking about the design of crossbows in the past dynasties, and suddenly remembered the crossbows of the Qin people!In the film and television drama, the scene of Qin people shooting ten thousand arrows came to mind.

Qin people's crossbows are divided into two types: single-man crossbows and arm-stretch crossbows, both of which are equipped. The kick-stretch crossbows are stepped on the bow, pulled by the arms and pulled by the waist, and wound with the strength of the whole body, so the firing speed of the crossbow is Far inferior to a bow.But the arrows fired are extremely powerful.The flying speed is several times that of a bow.Therefore, when the crossbow is fired, the arrowhead pierces the air, and the bowstring rebounds and rubs violently with the air, making a sharp whistling sound.

Zhao Si then stepped on the modified bow in front of him with both feet, opened and pulled it with both hands, and opened it easily. At this time, the movable pulley worked, and the subsequent control force was greatly reduced. Then he stepped on the bow with one foot, and the other hand Pull the bowstring, take an arrow with one hand, change the hand holding the arrow to hold the bowstring, free the other hand and change the foot to hold the back of the bow, stand up and shoot the arrow!
In this way, it is equivalent to using all the strength of the whole body to easily pull the three stone bow. Due to the labor-saving effect, the follow-up control is basically effortless, and ordinary people can do it with both hands!It takes very little effort to maintain aiming in the full bow state, so that the shooter can have more energy for aiming, which greatly improves the accuracy of aiming.

Finally, such a stupid method was used to solve this problem, but the whole process seemed a bit cumbersome, and the rate of fire dropped significantly.

Forget it, it's better than no improvement if it's only done in this way!Moreover, drawing the bow and shooting arrows in this way is faster than adding a crossbow arm and using a double crank to shake the string!The weight of the bow itself is not too heavy, it should be able to handle business!What's more, this is for Zhu Gui and Wang Lun. If I really have a chance to lead troops in the future, I must design lighter and more effective weapons.

Zhao Si put down the remodeled bow, picked up a cast iron pot, and saw that the blacksmith really mixed a lot of impurities into the cast iron raw material according to his own design, making it very rough, and cast the pot all over the body with Tian Zigou through casting molds. trench.The jars were of different sizes, some were slightly bigger than a fist, some were as big as two wine bowls joined together, and some were the largest, the size of a human head.

Zhao Si chose a medium one, filled it with gunpowder from the mouth of the can that was as thick as a thumb, and used a wooden stick with a flat top to pound the porcelain until it was full, then sealed the mouth with hard mud, drilled a small Eye, use a steel needle to penetrate the fuse that has been prepared.The fuse is the gunpowder rolled in the middle of the straw paper, which is the same as the fuse of the firecracker in Zhao Si's memory. In fact, this thing itself is a cannonball made of bad iron cans.

However, the medicine prepared by Zhao Si, sulfur and nitrate are all high-quality products that have been purified, and the ratio has been changed to use the most advanced British formula in the [-]th century (the specific formula is not disclosed due to river crabs) , not the so-called one-sulfur-two-nitrate-three-charcoal stuff for firecrackers, so it can maximize its performance.Coupled with the processing of this iron can, the explosion can completely blow up the iron can into pieces, and the flying speed will be greatly improved, and the lethality is no less than that of ordinary grenades.

The bow and arrow modification has been completed, but Zhu Gui will never take Zhao Si to see Wang Lun overnight, so there is no need to see him again in the evening, and now he is waiting for Wang Wendao to come and bring him to the back mountain to test this big firecracker. It is necessary to shock him.

So Zhao Si went back to the hut with a prepared cannonball and a pair of warrior armor, only to find that Wang Wendao had already arrived.

"Ah, you're finally back! I've been waiting for a long time. I wonder if you have anything new for me to see?"

Wang Wendao looks eagerly looking forward to it.

"That's the thing!"

"Haha, isn't this just a chamber pot?"

"I'm going! This is a weapon! How can such an advanced weapon be called a chamber pot?"

"The copper chamber pot I used when I was a child is very similar to the one in your hand..."

"Let's go! After seeing the power, you won't say that anymore!"

(End of this chapter)