After eating, Hu Lu and Sister Mizi were busy. Pen | fun | pavilion www. ｂｉｑｕｇｅ。 infoSun turned to the stove, picked up the bellows and left.

The great victory of the Iron and Wood Water War over the Aixin Jin Kingdom relied on advanced equipment rather than numbers. And the birth of the armored raft was completely accidental.

Wang Erniu is right, this battle is probably going to take some time, so the rear will be changed to production, and the research and development will be developed, and no one can say when there will be any sharp sparks.

The bellows used for burning fires in ancient China was, in Sun Yi's view, definitely a great invention of high-tech epoch-making. Although the structure of the bellows is simple, a piston is placed in the box, and the piston can be pulled or pushed to compress the air and generate continuous wind in the air duct. But to put it more broadly, the scientific principles used by the bellows involve fluid mechanics and Pascal's pressure formula!

Sun Yi's simple derivation is that since the bellows can compress air, they can compress liquids.

What is a compressed liquid? That's a hydraulic press!

With the same structure, replace the air with water, replace the air outlet with the water outlet, and the bellows will become a water press. Needless to say, the water pressure machine is used for farmland water conservancy, at least the original method of using a sheepskin tire to hang a water tree when Sun Yi was bathing.

If you go one step further and use the bellows in reverse, that is, the compressed air is used as the power source and the lever of the bellows is used as the power output, then the bellows will properly become the engine!

If you make it clearer that water vapor is used as compressed air, this is the great steam engine!

It is said that China has invented bellows since the Han Dynasty, and Sun Yi believes that with a slight dial, the craftsmen of the Ming Dynasty may be able to come up with something surprising.

Sun Yi found a group of craftsman doctors, who were the original craftsmen, and finished his thoughts in a few words.

A doctor circled the bellows twice, and with a wave of his hand, beckoned them to soak the bellows in the pool.

The doctor pulls the bellows, and sure enough, a bubbling stream of water erupts from the air outlet. After a few pulls, the water flow gradually decreases, and the bellows becomes light and airless.

"I think it can be done!"

The doctor quickly dismantled a bellows baffle and removed the bellows' piston, which was actually a wooden board slightly smaller than the box.

Around this plank, a dense circle of chicken and duck feathers is fixed, and after soaking in water, the feathers become wet and smaller, and no longer have the effect of sealing pistons.

The doctor said, "Replace the feathers with leather, and it won't leak too much." ”

Immediately, someone found the scraps of sheepskin, cut them into long strips, and fastened them around the piston with fish glue.

The doctor pulled the bellows again, and the bellows suddenly became calm and powerful, and a torrent of water shot out from the original air outlet, and the water column rose four feet high.

Sun Yi didn't expect that it would be so simple to change from a bellows to a "water tank".

The doctor asserted: "The bellows of the master is for cooking, and if it is replaced by the bellows of the stove maker, the effect is estimated to be better!" ”

Sun Yi asked, "What's so special about the furnacemaker's bellows?" ”

Someone replied: "The furnace maker's bellows are very strong and strong." The bellows used for cooking at home is made of wooden planks to make a flat box, and the bellows of the furnace maker is hollowed out in the middle of the whole log to make a barrel-like cavity, and the two ends are blocked with wood. ”

As he spoke, the doctor found a long wooden stick, tied one end to the lever of the bellows, held the other end in his hand, and found a stone in the middle as a fulcrum, and pryed the bellows one by one, and suddenly the water jet spewed out seven or eight feet high.

Sun Yi understood that this was the principle of leverage, but the craftsmen called this long stick an orange tree.

Every time the orange tree is pressed, the water is sprayed once, and when the orange tree returns to a high position, the water flow slows down and becomes shorter because it cannot be strengthened.

The doctor simply put the bellows down, so that the water is parallel to the water surface, and the orange tree moves from up and down to left and right, and sure enough, the water is much more even.

As the bellows gradually fill with water, the bellows gradually sink into the water, and the outlet submerges underwater.

Fun stuff happened.

The bellows come out of the water on one side, and slip out on the other side to the distant water.

Another doctor snorted, "It can still run!" ”

The doctor took a large wooden plank, placed the orange tree on the board, fixed the bellows to one end of the board, and then put the board in its entirety into the pond.

The Doctor himself stood on the plank and shook the orange tree, and the plank actually moved forward like a ship!

Sun Yi "buzzed" in his head, there were jet planes in later generations, and the craftsmen of the Ming Dynasty actually invented waterjet boats!

Those who fly in the air rely on jets to advance, and those who swim in the water rely on jets to advance, this principle, this plan, you can know that it is feasible if you think about it with your toes.

However, the doctor also participated in the design discussion of the armored raft in Changsheng Township, and the doctor opened his mouth: "Our armored raft has a big problem that kills people, and it can be solved with bellows." ”

The doctor walked over to a blackboard and began to draw.

A small wooden board painted with paint is a blackboard.

The blackboard is now widespread among the ironwood artisans, and has become an indispensable tool for everyone to discuss problems.

Sun Yi originally thought that he would use special blackboard paint to make a blackboard, but he didn't expect that ordinary lacquer would do, and lacquer is naturally black, which is the so-called "pitch black". Paint the lacquer as smooth as a mirror, and you have to be a good carpenter, and the best at lacquer art in ironwood is the adoptive father of the milk baby, Yang carpenter.

However, the pen used by the doctor is not the chalk "invented" by Sun Yi, but a more delicate talc pen. Only when marking the key points will the doctor make a few strokes with red chalk colored with cinnabar.

The doctor first drew a slender reed raft and explained: "Our armored raft must be equipped with shields and armor around it during war, and there is a problem: people cannot be placed on both sides of the raft to paddle. ”

He drew two rough passages in red chalk directly below the raft on the blackboard, and then said: "To solve this problem, we can now place two furnace makers' log bellows directly under the reed raft, one on the left and one on the right, and dig two holes in the bilge of the raft, so that the orange trees can reach into the inside of the cabin." “

"In this way, the sailor can operate the armored raft by shaking the orange tree inside the cabin. The left and right two log bellows enter the water from both sides, and the water comes out from the front or back, and the water can be advanced and retreated at the same time, and one can enter and one retreat, and the raft will enter and retreat in front of the water, or turn and turn around. ”

Sun Yi secretly pondered to himself that in later generations, there were propeller planes first, and then jet planes. Most of the ships of later generations were propeller-propelled. With propeller propulsion, a powerful engine is first needed, which is the weakness of Ironwood now. Ironwood directly uses water jet propulsion, who knows if in the later stage of development, will there be a phenomenon of high-efficiency machines like jet fighters in later generations?

The doctor, who was drawing on the blackboard, drew two more circles in the cabin, "It is not convenient to push and pull the orange tree back and forth, so we can use a connecting rod to connect the orange tree to the wheel, like a fan or a spinning wheel, so that the sailor can turn the wheel in the cabin." ”

Sun Yi exclaimed excitedly, "In this way, in addition to manpower, wind power and livestock can provide power for the armored raft!" This project is immediately listed as the highest priority! ”