Mobile Academy.
The classroom was filled with smoke.
Ever since I became a scientist and started to devote all my efforts to mental work, everyone found that it was really more tiring than physical work.
In just one or two years, many people in this classroom have become bald.
Everyone became addicted to smoking. And alcohol addiction.
There is no way. Under that kind of high-intensity scientific pressure, there are only two ways that everyone can think of to relieve the pressure.
There were fifty people sitting in the classroom, and twenty of them had pipes in their hands. A common scene is holding an eyebag in the left hand and a pencil in the right hand.
Li Zhen stood in front of the blackboard:
"Who can tell me the disadvantages of airships?"
Ma Jianbin clamped the pencil to his ear, stood up and answered:
"Master Li, I personally believe that airships as war machines are actually a short-lived effect."
"Tell me why?"
"First of all, the airship's body is too big, its target is large, and its speed is slow. It is actually not suitable for use in war. The most important thing is that hydrogen is a flammable and explosive gas. If long-range weapons are developed, it will not be used on the ground. If the airship is hit by a collision, it will cause a devastating disaster. The airship may achieve good results in the short term, but because the principle of the airship is too simple, I am sure that it will not be long before the airship becomes the world's largest airship. Airships will appear in other areas as well.”
"Ma Jianbin, you are right. But these are not actually the biggest drawbacks of airships."
Li Zhen said: "The biggest drawback of airships is their high cost. First of all, it is difficult to prepare hydrogen. Secondly, basically once an airship takes off, it is disposable. It can meet the requirements of long-distance flights. But it cannot meet the practicality of war. Demand. So, our next course is to develop another kind of aircraft."
"This time requires close cooperation and in-depth communication between the Aviation Academy and the Motor Vehicle Academy. I have a vision. If this project is successfully developed, New Kyushu will completely become an aviation hegemon."
At this time, Liu Jinghong, the dean of the Aviation Academy who was observing, stood up:
"Master Li. Regarding new aircraft, the Aviation Academy has always had an idea. It was a vague concept before, but after the emergence of airships, this idea gradually became clear."
"you say."
"Wingspan aircraft."
Liu Jinghong walked up to the podium and talked eloquently: "We have passed the test. Install a propeller on a small internal combustion engine, carry it behind your back, and then hang a paraglider. You can take off directly from the flat bottom and truly fly alone in the sky. .This is a motorized paraglider."
Li Zhen nodded, he knew this.
This is a topic they have started since the advent of airships. It is to prove whether forward momentum can be converted into rising buoyancy. The experiment was successful.
That’s when paragliding in the true sense appeared.
Liu Jinghong added: "Actually, through this step, we already have a second type of aircraft, which is a motorized paraglider. But the actual situation is that it cannot be used in war or industry. It can only satisfy individuals. Its inability to fly long distances is also the biggest disadvantage. After our imagination, we theoretically established a new aviation tool. We call it a wingspan aircraft."
"The cockpit is set up through the main structure with a wingspan. An internal combustion engine is used at the rear to obtain thrust. The whole body adopts a streamlined structure. After the engine is pushed forward, the wings are tilted upward, so that the upward power can be obtained. Successfully soar in the air. Principle It’s not difficult, but there are practical technical problems that need to be overcome.”
airplane!
Li Zhen's first reaction was ecstasy.
The idea of an airplane emerged. I had always known the structure of the aircraft before, but I felt that it was too difficult for them. It felt like reaching the sky in one step. It's not as stable as being down to earth. Therefore, I want to wait until the scientific and technological foundation has developed to a certain level before proposing it.
Unexpectedly, scientific progress is indeed linear. This idea was proposed by someone from the Aviation Academy.
Very good, wingspan aircraft.
Li Zhen asked: "What technical problem?"
"The first is the material problem. We need a lightweight material that is not only strong, but also has a certain degree of toughness. The most important thing is that it must be light. I have contacted people from the Institute of Materials Engineering, and they are currently unable to provide such a material. Material. We thought about using wooden materials, but we were overturned. Wood is not strong enough to withstand the weight of gravity carried by the lift force."
"The second is the power problem. Today's internal combustion engines of airships are not enough to drive the wingspan-type aircraft we propose. We need lighter, more powerful, and more stable internal combustion engines. Today's internal combustion engines are often prone to flameout. And this kind of flameout The hidden danger is a fatal and devastating blow to a wingspan-type aircraft."
"Third, that is our design problem. But if this problem is put on the agenda to study, it can be overcome in a short time."
Li Zhen couldn't help but think deeply, imagining the aviation aircraft of their era that Zhang Zhi had described to him, and came up with a bold idea in his mind.
Now that it has really developed to this point. So why not put this on the agenda
Problem, yes. There are many.
But no matter how difficult the problem is, it will always be overcome in the end.
Going from 0 to 1 is the hardest. But from 1 to 1000, it is simple.
Recalling that I didn't know anything at the time, I just figured out the steam engine. Starting from the steam engine, the entire Kyushu region was rapidly changing with each passing day. This is the progression from 0 to 1.
The difficulty of aviation seems to be 1000, it is not about eating a fat man in one bite. Just groping.
"That's right. Regarding the issue of new internal combustion engines, I have an idea for you to study."
As soon as this statement came out, everyone in the entire classroom sat up straight and pricked up their ears.
Li Zhen took out a piece of chalk, faced the blackboard, closed his eyes and was silent for a long time. I went through what Zhang Zhi had described in my mind, and then relied on my imagination to draw a three-dimensional schematic diagram in my mind.
He raised his hand and started drawing on the blackboard.
About half an hour later, an extremely complex picture appeared on the blackboard. Looking at it from a distance, you might think that the painting looks like a sun radiating light.
But if you look closely, you will find that it is a disk in the middle. And there are pistons all around.
Look carefully again. do not understand.
"This is… "
Ma Jianbin walked up to the podium and observed it closely for a long time, and couldn't help but wonder.
Li Zhen threw away the chalk, pointed at the things on the blackboard, and said loudly:
"Four-stroke radial reciprocating engine!"
All the members in the class immediately exploded and talked about it.
Just hearing this name makes me feel uncomfortable. Nervous, anxious.
For people in the Motor Vehicle Institute, nothing is more thrilling than a breakthrough in engine technology.
People say that life is very happy when the wedding night is full of flowers and candles, and when the gold medal is named.
But for them, the greatest joy in life is to listen to Li Chen put forward new concepts one after another.
(End of chapter)