fly?
Who doesn't want to fly?
Since ancient times, human beings have always had a strong yearning for the sky. Because of their religious beliefs, they believe that the sky is where God lives. However, due to the backward technology in ancient times, flying was definitely impossible.
I don’t know how many people have tried to fly into the sky.
However, they all ended in failure.
Therefore, Liu Zheng's words immediately excited the three of them.
"Sir...can this thing go to heaven?"
"Can you fly?"
"Isn't it possible? This..."
Although I know that my young master is very powerful, he is flying to the sky! Many capable people in history couldn't do it, but Liu Zheng can do it?
Liu Zheng chuckled.
He really can't make any airplanes, rockets, or aircraft right now. But being deeply influenced by the technology of later generations, he still had no problem tinkering with a hang glider.
This was something that suddenly popped into his head these past few days while he was eating melons, watching movies, and fishing.
Why?
It's very simple, it's aimed at the Huns!
Liu Zheng thought for a long time, why the ancient Xiongnu soldiers were so difficult to deal with, it was because they were too mobile. They can fight or retreat, and are very difficult to deal with.
So what is the solution to deal with the Huns?
In history, it is actually recorded. It is mentioned in "Han Shu" that Wang Mang recruited strange people from the people and developed a kind of wings made of bird songs. He put feathers on his head and body, and jumped up on his feet. He really had to fly hundreds of steps before landing. Down, this should be the predecessor of wingsuit flight.
At that time, Wang Mang wanted to attack the Xiongnu!
Of course, regarding flying, in the early Ming Dynasty, there was a man named Tao Chengdao, holding two kites, sitting on a snake-shaped flying car with forty-seven rockets attached, and flew into the sky through the reaction force of the rockets. Unfortunately, The unfortunate fall is the story of "Ten Thousand Houses Flying to the Sky".
When Liu Zheng admires these pioneers, he will naturally not put himself in danger...
What he wants to do is hang gliding!
This is what he has been tinkering with these days.
Gliding is the only way he can fly in this era. The main structure of a hang glider consists of a triangular frame, a control frame, a mast, a tension line, and an umbrella cloth.
The triangular frame is composed of a keel, a beam, and two leading edge beams, which determines the plane shape and area of the umbrella wing.
The initial triangular frame was on a plane, with the keel as long as the front edge. Later, it gradually developed, the angle of the vertex gradually became larger, and the keel became relatively smaller and curved.
Since Liu Zheng has scientific knowledge, he naturally comes directly to the most perfect one! He controlled the weight of the hang glider between ten and thirty kilograms, with the center of gravity slightly forward. Of course, he also needed many test flights to determine the most suitable size and angle.
Near the end of the leading edge, an external wash strut is also fixed. The first function is to prevent the wings from stalling at the same time, and the second is to automatically improve during the dive.
The control frame is also an equilateral triangular frame made of three rods, fixed under the keel and beam, and is used by the pilot to control the direction. Nowadays, two wheels are usually installed on the bottom rod of the control frame.
The mast, fixed above the keel, is used to support all landing tension lines and prevent the wings from bending when overloaded.
The tension line on the upper surface of the umbrella wing is called the landing tension line. It is connected from the main mast to the top corner, leading edge, and keel. Its function is to land or bear the gravity of the wing on the ground.
The tension line on the upper surface of the umbrella wing is called the lift tension line, which is connected to the top corner, leading edge, and keel from both ends of the control frame. Its function is to bear the tensile force during flight; there is also a reverse bending tension line on the upper surface of the umbrella wing. The ribs connected from the main mast to the umbrella cloth are used to make the airfoil a little counter-bent to ensure that the glider can recover from a dive.
Umbrella cloth: The skin of the hang glider is sewn on the triangular frame. There are also certain long pockets sewn on the two wings, with ribs inserted inside to maintain the shape of the wing.
certainly……
In the future, Liu Zheng will also develop some equipment for pilots to protect their safety.
But currently, this hang glider is still in the testing stage, and those are things for the future.
"Sir, this, this, this, this thing can fly?"
Jiang Xuan was very excited.
Liu Zheng had a bad smile on his face: "You'll know if you try it, don't you?"
soon.
He called a few soldiers, loaded the newly crafted hang glider into a carriage, and drove to the countryside. Jiang Xuan, Qin Changfeng, and Pei Qianyun were extremely excited.
certainly.
Liu Zheng felt that they would no longer be able to laugh after a while.
Although Liangzhou is not as windy as the Xiongnu grassland, in winter, the winter wind blows on the face, which is painful.
A few people found a flat land not far from the hill. Liu Zheng surveyed the terrain and thought it was OK, so he nodded.
Most of the mountains in this area are neither high nor low, which are just suitable for gliding. Judging from how well he knows his quality, even if the car overturns... there will probably be no life-threatening problems.
For a delta wing to fly, it must generate upward force. And this upward force is lift. The delta wing uses a specific cross-sectional shape of the airfoil to cause the air flowing through the upper and lower airfoils to produce different flow speeds, thereby forming a force difference and generating lift.
The basic rule for long-lasting hang glider flight is to look for updrafts and fly into them. Updrafts have many causes, the most common being ridge currents and thermals.
When horizontal wind hits an obstacle, it is forced upward. This is the ridge flow.
When the ground (water surface) somewhere is heated by the sun and conducts heat to the nearby air, the hot air rises, forming a thermal airflow.
Generally speaking, ridge air flows in a band along a mountain range, with pilots traveling back and forth among them. Thermal airflow starts from a certain point on the ground and rises in the shape of a column or thermal bubble, and the pilot spirals up in the area.
This is why Liu Zheng chose hang gliding to plot the Xiongnu grassland.
Because there is no shortage of ridges on the grassland!
The unique Xiongnu grassland is more suitable for hang gliding flight!
Just imagine, if the glider is really successfully developed, the Yinzhou Army will be able to travel thousands of miles at a time, and the Xiongnu's mobility advantage will be wiped out in an instant!
Not only can it meet combat needs, but it can even achieve stronger survey effects!
"Ah? Young Master, are you going to get up on the ground?"
All three of them are a bit strange.
They thought that for the first time, they should jump from a high place first...
Liu Zheng rolled his eyes, I asked you to fly, not to use you as a parachute.
"Of course. Who comes first?"
"Me me me!"
Jiang Xuan was naturally the first, which made Qin Changfeng and Pei Qianyun roll their eyes.
Then, Liu Zheng taught Jiang Xuan how to hold it, and Liu Zheng chose the rattan grip. Because the rattan type has strong control over the elevation angle, it is conducive to controlling the elevation angle according to various takeoff conditions during takeoff.
Jiang Xuan quickly mastered it and asked excitedly: "Can it really fly? Is it really possible?"
"Remember the movements I taught you just now. If I tell you to run, just run!"
Liu Zheng chuckled.
The other two people looked at Jiang Xuan enviously. If he really could fly, wouldn't he be the first person to fly?
At this time, the breeze picked up.
Liu Zheng shouted: "Run!"
Jiang Xuan carried the hang glider and ran facing the direction of the wind.
Everyone watched eagerly.
Can it really fly?
