A mobile college.

The classroom was filled with smoke.

Since I became a scientist and started to put in all my mental work, everyone found that this is really more tiring than physical work.

In just one or two years, many people in this classroom have gone bald.

Everyone is addicted to smoking. There is also 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 stress.

There were fifty people seated in the classroom, and twenty of them were carrying cigarette guns. The common scene is one with an eye bag in the left hand and a pencil in the right hand.

Li Zhen stood in front of the blackboard:

"Who can name the disadvantages of airships?"

Ma Jianbin put the pencil on his ear, stood up and replied:

"Master Li, I personally think that airships as war machines are actually a short-lived effect."

"Tell me why?"

"First of all, the hull of the airship is too big, the target is large, and the speed is slow. It is not actually suitable for use in warfare, and the most important thing is that hydrogen is a flammable and explosive gas, and if a long-range weapon is developed, it can be hit on the ground. Then just rub and touch, and the airship will have a devastating disaster. Airships may be able to achieve good results in the short term, but because the principle of airships is too simple, I'm sure it won't be long before airships will appear in other parts of the world. ”

"Ma Jianbin, what you said is good. But these are actually not the biggest drawbacks of airships. ”

Li Zhen said: "The biggest disadvantage of airships is that they are expensive. The first is the difficulty of hydrogen production. The second is that basically the airship is lifted into the air once, which is a one-time thing. It is capable of meeting long-haul flights. However, it could not meet the practical needs of war. So, our next course is to develop another kind of flying machine. ”

"This time, we need to work closely with the Aviation Institute and the Mobile Institute. Deep communication. I have a vision that if this project is successfully developed, Shin-Kyushu will become an aviation hegemon once and for all. ”

At this time, Liu Jinghong, the president of the Aviation Academy who was observing, stood up:

"Master Li. With regard to the new type of aircraft, the Aviation Institute has always had an idea. Before, it was a vague concept, but after the appearance of the airship, this idea gradually became clear. ”

"You say."

"Wingspan aircraft."

Liu Jinghong walked up to the podium and talked eloquently: "We have been tested. A small internal combustion engine is equipped with a propeller, with the person on his back, and then hung on the paraglider. It can take off directly from a flat bottom, and it is a real solo flight in the sky. This is a motorized paraglider. ”

Li Zhen nodded, he knew this.

This is a topic that they have started since the advent of the airship. It is to prove whether the forward momentum can be converted into rising buoyancy. The experiment was successful.

That's where paragliding in the truest sense of the word appeared.

Liu Jinghong said again: "Actually, through this step. We already have a second type of flying machine, which is the motorized paraglider. But the reality is that it cannot be applied to war, nor can it be applied to industry. Only the needs of the individual can be met. Its inability to fly long distances is also the biggest drawback. We conceived and theoretically established a new aviation tool. We call this a wingspan aircraft. ”

"Through the main structure with a wingspan, the cockpit is set. An internal combustion engine is used in the rear, which gains thrust. The whole body adopts a streamlined structure. After the engine is pushed forward, the wings are angled upwards, so that the upward momentum is obtained. Soar through the air with success. The principle is not difficult, but the practical technical problems need to be overcome. ”

Plane!

Li Zhen's first reaction was ecstasy.

The idea of an airplane appeared. I had always known the structure of the plane, but I felt that it was too difficult for them, and it was a feeling of climbing to the sky in one step. It's better to be down-to-earth and stable. Therefore, I want to wait until the scientific and technological foundation has developed to a certain level before proposing it.

Unexpectedly, the progress of science is indeed linear. It was still proposed by the people of the Aviation Institute.

Very good, wingspan type aircraft.

Li Zhen asked: "What technical difficulties?" ”

"The first is the material problem. We needed a lightweight material that was not only strong, but also tough. The most important thing must be light. I've been in contact with people from the Institute of Materials Engineering, and they can't provide such a material for the time being. We thought about using wood, but it was overturned. Wood is not strong enough to withstand the weight of gravity carried by lift. ”

"The second is the power problem. Today's airships do not have enough internal combustion engines to power the wingspan aircraft we propose. We need lighter, more powerful and more stable internal combustion engines. Today's internal combustion engines are often prone to flameouts. And this hidden danger of stalling is a fatal blow to wingspan aircraft. ”

"Thirdly, that's our design problem. However, this problem, if it is put on the agenda to study, can be overcome in a short time. ”

Li Zhen couldn't help but think deeply, imagining the aviation planes of their era that Zhang Zhi had described to him, and he had a bold idea in his mind.

Now that it has really come to this point. So, why not put this on the agenda?

Puzzle, there is. There are a lot of them.

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's simple.

I remembered that I didn't know anything back then, so I just figured out the steam engine. Starting with the steam engine, the whole of Kyushu immediately changed with each passing day, and changes appeared every day. That's how you go from 0 to 1.

The difficulty of the aviation plane seems to be 1000, and it is not a fat man who eats one bite at a time. Only groping also.

"That's right. On the subject of the new internal combustion engine, I have an idea for you to look into. ”

As soon as these words came out, everyone in the 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 the things that Zhang Zhi described in my mind, and then relied on my imagination to draw a three-dimensional schematic diagram in my mind.

Raise your hand and start drawing on the blackboard.

About half an hour later, an extremely intricate drawing appeared on the blackboard. From a distance, you think it's like a glowing sun.

But if you look closely, you can see that it is a disc in the middle. And all around it are pistons that come out.

Look closer. I don't understand it.

"It's ......"

Ma Jianbin walked up to the podium and observed it up close for a long time, and couldn't help but wonder.

Li Zhen threw away the chalk head, pointed to the things on the blackboard, and said loudly:

"Four-stroke star reciprocating engine!"

All the members of the class immediately exploded and talked about it.

Just hearing the name, I don't know it. Nervous, apprehensive.

For the people of the mobile hospital, there is nothing more blood-pumping than a breakthrough in engine technology.

The world says that when the cave room spends candle nights and the gold list is inscribed, life is very happy.

But for them, the great joy of life is to listen to Li Zhen put forward one new concept after another.