Liu Jinghong was about to go crazy, and asked urgently: "Why?" Why isn't it realistic? ”

Li Zhen pointed to the motor and said, "The power is too small." ”

"This speed is already super high, how can it be low power?"

Li Zhen said with a smile: "Synchronous motors have a common problem. High rotational speed and low torque. When I say low power, I mean that it has too little torque. I can't show it with this small propeller, so let's change it to a 40 cm long propeller. ”

Someone immediately went to look for it.

Propellers are now the standard configuration of aviation institutes, and as soon as industry appeared, propeller processing was too easy. And the aviation academy is full of propellers, and everybody is working on this thing, all sizes.

Soon, someone installed a forty-centimeter propeller on the motor.

Liu Jinghong and the others were silent, and they seemed to see the result.

"Pick it up." Li Zhen nodded.

'Zizizi'

When the electricity was connected, a sharp sound suddenly came from inside the motor. The propeller shook twice, but it didn't turn.

After a while, I saw green smoke coming from the motor. There is a constant sound of 'sizzling' from within. The propeller just shakes, it doesn't spin at all.

Li Zhen shouted to turn off the power and said: "Torque is the core thing of an engine in addition to the speed." Obviously, this electric motor can't even carry a 40-centimeter-long propeller, which already speaks for itself. Synchronous motors cannot be used in airship engines. ”

Liu Jinghong said a little unwillingly: "Master Li." But...... Maybe it's because the synchronous motor is smaller. The power will increase according to its internal structure. In two days, we will make a motor that is ten or twenty times larger than the current motor, and its torque will definitely increase by geometric multiples at that time, and its speed will also increase by more than ten or twenty times. ”

Li Zhen laughed: "Let's not talk about whether the synchronous motor will become larger and more powerful with the larger the body, you can communicate with the people of the Institute of Electromagnetic Intelligence." According to your train of thought, the reminder is ten times bigger, and the torque and power are also ten times greater, so the energy is conserved Did I say that? On the other hand, will the power consumption also increase tenfold? ”

"Uh...... This ......"

Liu Jinghong was speechless.

Li Zhen glanced at Liu Jinghong sternly, and said seriously: "The most terrible thing in science is for laymen to guide professionals." The people of the Aviation Research Institute are all about aeronautics, and the people of the Mechanical Research Institute are learning the power of mechanical structures. In one sentence, your behavior is simply using your hobbies to challenge other people's jobs! ”

As soon as these words came out, everyone in the Aviation Institute and the Machinery Institute lowered their heads.

And all the people in the Institute of Electromagnetic Research have their heads held high. Comfortable, comfortable, quick, Master Li, scold them a few more words.

As a result, Li Zhen's voice changed, and he looked at the Institute of Electromagnetic Weapons again: "You are very proud, aren't you?" I didn't figure out the things in my professional field, but let a group of laymen mature the technology. Are you proud? ”

As soon as he said this, everyone in the Institute lowered their heads in shame. I wanted to explain, 'We're focusing on AC motors now,' but I didn't.

Li Zhen stood up, pointed to the motor that was still smoking, and said, "If you magnify it tenfold, assuming that the power is also ten times larger, the power consumption will also increase tenfold." That would require a tenfold increase in batteries. The big battery you are using now weighs at least a few dozen pounds, right? After turning around for a while, try how much electricity is still in it? If you want to use a synchronous motor as an engine, if you can really get a motor that is powerful enough to propel an airship. Then you need to bring at least a few hundred kilograms of batteries with you.

A few hundred kilograms of battery, perhaps, can only keep it spinning for an hour. Does it make sense? Even if you don't think about the range, I ask you, how much thrust do you think this synchronous motor can produce even if it increases its torque by a factor of ten? A very simple problem, even if its power is increased by twenty times, it is impossible to propel a few hundred kilograms of airship forward. ”

Liu Jinghong shouted: "Master Li, I think too much about this. ”

Li Zhen sighed: "I know you are desperate to make progress. But speed is not enough, and progress is not something you have to mess with. I'm not criticizing you, I'm encouraging trial and error, but you should at least find the right direction. Why should I be harsh on you, because you are in too much of a hurry. If you calm down and think about it, and make your own theoretical basis, you will be able to find out for yourself that this is unrealistic. As a result, you don't even do theoretical ideas, just hold the motor and have a whimsical idea. ”

The crowd was speechless. Indeed, this is an obvious drawback, but it is just a whimsical idea. People don't even do the data foreshadowing......

Li Zhen smiled and said, "I didn't say it. The power of this synchronous motor is not even comparable to that of a human-driven ......."

"Huh?"

Liu Jinghong asked in surprise: "Is it paddling in the sky?" ”

Li Zhen's face darkened on the spot: "The devil is stunned, right?" Is it stupid to build a spaceship in Eight Dragons City? ”

"Hahahaha."

Everyone burst into laughter, Liu Jinghong's face turned red, and he lowered his head. Secretly patted his head, rubbed, Xun Tianzi really affected his IQ. I've been in contact with that grandson for a long time, and my IQ can't keep up.

In this Kyushu Academy of Sciences, how could he say such stupid things? Paddle in the sky...... I can say it myself.

Ma Jianbin's eyes lit up and he hurriedly said, "Master Li, I have an idea. ”

"Tell me."

"You just reminded me that you can use the chain to connect the propeller. And then the person pedals on the top, driving the chain, and the chain driving the propeller? Hey, that's a great idea, a human-powered airship. I think you can try it, alas, human drive, this torque should be more than the electric motor, right? ”

Li Zhen covered his forehead helplessly: "I just gave an example." ”

After thinking about it, he said, "Then if you want, you can try it." ”

Everyone dispersed, and Li Zhen was suddenly stunned on the spot.

No, why did a word suddenly pop up in my head, called - internal combustion engine?

What is an internal combustion engine?

Li Zhen was completely confused, why did he feel as if someone had told him that there was an internal combustion engine on top of the steam engine. But I can't remember it, the internal combustion engine is a thing?

What is the principle of an internal combustion engine?

Li Zhen's brows gradually tightened, he was sure that someone had really told him about the internal combustion engine, but he was so vague that he couldn't remember the principle of the internal combustion engine at all. Perhaps, that person just mentioned it casually, maybe that person didn't know much about the principle either.

But the question is, who exactly told him?

Suddenly, his heart became hot again, Li Zhen covered his chest and muttered, "Is it her?" ”

"Who is it?"

“……”

His knowledge is running out and he needs to make up for it.

PS: A big update for you to vote for a monthly ticket, a big increase for your reward. Today continues the fifth watch. 10