The Strongest Lu Bu's Sweeping Thousands of Armies

Chapter 213 Glider

Lu Bu told Pang Tong and others that the flying kite was like a kite. In fact, he knew very well that the so-called flying kite was actually a three-winged glider that many sports enthusiasts fell in love with later.

After drawing a blueprint overnight, Lu Bu got together early in the morning and got together with a group of craftsmen, thinking about how to make the glider.

Unlike a balloon, a glider does not need additional kinetic energy, and only needs to use the resistance of the wind to achieve the purpose of flying into the sky.

When the aircraft takes off, there will be three different resistances in mid-air.

The first one is frictional resistance.

Frictional resistance is mostly determined by the appearance of the aircraft. The rougher the surface and the wider the head, the greater the frictional resistance.

Excessive frictional resistance will cause the aircraft to decelerate sharply or lose balance during flight, which is the resistance that needs to be overcome most.

The other two resistances play a key role in the flight of the aircraft.

One of these is called differential drag, which is created when an aircraft is in mid-air.

The air is divided by the aircraft, creating different pressure differences at the nose and tail.

The tail pressure difference will be infinitely close to zero.

Appropriate pressure difference plays an extremely important role in maintaining the balance of the aircraft.

Pressure differential resistance is a kind of parallel resistance, and another kind of resistance that determines the altitude of the aircraft is named induced resistance.

Before Lu Bu came to this era, he also learned about mechanics.

Although what he has learned is only superficial, at least he knows more than people in this era.

The glider does not seem to have much technological content, but Lu Bu knows very well that the simpler something is, the more elaborate it needs to be done.

Using the gifts of nature to send people into the sky not only tests the craftsmen's ability to make aircrafts, but also tests the skills of future glider pilots and soldiers.

The carpenter selects the best firewood and polishes the wood into a solid round stick.

Two carpenters are using ropes to try to bind sticks into a triangular skeleton.

Lu Bu stood beside them and watched.

When the two of them tied up a skeleton, Lu Bu said: "Such a skeleton will definitely not be able to fly into the air. Once the wind resistance is too large, it will definitely blow the flying kite away."

The two craftsmen raised their heads and looked at him in fear.

They didn't dare to ask more questions, but they also knew that Lu Bu was right.

"There's a good way to fix the skeleton." Lu Bu said, "It's best to use nails, but we don't have nails, so we can only use your skills to make grooves and tenons on the sticks."

Of course, carpenters know how to make grooves and tenons, so they choose to use ropes instead of grooves on wooden sticks. They consider that grooves are more difficult, and it is difficult to make grooves on a triangular skeleton. .

Seeing the confusion on the faces of the two carpenters, Lu Bu asked, "Do you think it is difficult to join the notch and the tenon of the stick?"

"What Wen Hou said is true." One of the carpenters replied: "The wooden stick has a notch, and it is really difficult to close it."

"Then think of a way to cut the chute." Lu Bu said: "The tenon and the trough are oblique, and the notch and the tenon should be wide enough and long enough, and a few more grooves should be made at the joints. The medium force will be distributed to different slots. The force is uniform, it is difficult to break, and it is more secure."

The two carpenters glanced at each other, and both saw consternation in each other's eyes.

They really didn't think about the method Lu Bu said.

After his instruction, the two craftsmen suddenly realized.

The two bowed to Lu Bu and said, "Don't worry, Marquis Wen, we will definitely carve the grooves and tenons to fit perfectly."

Walking away from the two carpenters who were making the skeleton, Lu Bu came to the side of the cobbler who was cutting the hide.

Several cobblers were busy putting the hides into the barrels containing the saltpeter.

The animal skin was put in, and steaming white mist came out.

Just approaching the wooden barrel, Lu Bu smelled a strong stench.

When the craftsmen saw him coming, they all stood up and saluted.

"Why is the smell so strong?" Lu Bu asked.

"Hui Wenhou." One of the craftsmen replied, "It is true that the animal skin has a strong smell when it is tanned. After the tanning is finished, the smell will disappear."

"What kind of skin do you use?" Lu Bu came to the barrel and looked at the rolled animal skin inside.

"It's sheepskin." The craftsman replied: "The toughness of the sheepskin is not bad, but it's a little thinner."

"Why don't you use cowhide?" Lu Bu said, "Isn't the toughness of cowhide better?"

"The law of the Han Dynasty prohibits the use of cowhide." The craftsman lowered his head and replied softly.

He was also muttering in his heart that Lu Bu, as Marquis Wen, didn't even know that cattle were not allowed to be slaughtered at will.

"Is it because the cattle are precious?" Lu Bu asked again.

"Yes!" the craftsman replied.

"Hu people in the north also raise cattle, but their cattle are not used to plow the fields, but to be slaughtered for skin and meat." Lu Bu said: "I will let people buy a large number of cowhide from the north first. Later, it is best to make flying kites." Use cowhide."

The flying kite he mentioned to the craftsmen is actually the most primitive delta glider.

Just talking about glider may not be easy for craftsmen to understand.

It is easier for them to accept it as Feiyuan.

Since it is something that is going to fly into the sky, of course the better the toughness of the cortex, the stronger it is, and the less unnecessary non-combat attrition will occur to the soldiers who use them.

While watching the cobbler tanning the sheepskin, Pang Tong came over: "Marquis Wen has been watching the making of flying kites?"

"Actually, you can call it a glider in the future." Lu Bu smiled at Pang Tong: "Shi Yuan just came, and I happen to have something to discuss with you."

"What's Marquis Wen thinking?" Pang Tong asked.

"Gliders and balloons use animal skins, and so do the armors worn by soldiers." Lu Bu said: "The imperial court has always allowed the use of cowhide for armor. However, there are only enough sheepskins for the wings and balloons of gliders. Use. Sheepskin is thinner, and it is easy to burst after going to the sky. I am wondering, do I need to breed more cattle?"

"Cow breeding?" Pang Tong said in surprise: "In today's troubled times, although the population is small, there is not enough food. Who can raise so many cows?"

"Cows and sheep don't consume too much by eating grass." Lu Bu said: "You can distribute young cattle to the people and let them raise them. When the cattle are old enough to be slaughtered, they will be sent to the people's homes to buy them. From now on, cattle As special livestock, sheep are not allowed to be sold or slaughtered privately, they can only be sold to the government and slaughtered by the government.”

He then added: "We can't fully control the local governments. It is inevitable that some officials will benefit from it. The officials are too fat, and the people will suffer. You have to make local laws to restrain them. Kill what should be killed, what should be withdrawn, we must ensure that the officialdom is clear, so that we can go further."

"Marquis Wen has a long-term vision, so I'll do it now!" Pang Tong agreed.

(End of this chapter)