Pei Qian naturally didn't know that those grass leaves that could cure diseases were tobacco, the source of all evil.

In fact, the history of Mayan smoking can be traced back to BC. In a Mayan temple in Jalpas, Mexico, there are still reliefs of Mayan smoking around 400 AD.

These tobaccos are regarded by the local people as a magical medicine to treat all diseases. They can be applied externally for external injuries and smoked for internal injuries. Moreover, they also have the ability to kill bacteria and treat the plague.

However, this does not mean that tobacco is necessarily a good thing. Smoking is harmful to health. This is the slogan printed on the most eye-catching place on every cigarette package in later generations.

It's just that Pei Qian didn't know the dangers and thought he had gained something, so he was very happy.

And just when the Han Dynasty was on an expedition abroad, regaining lost lands such as Guanzhong and Henan, and ocean-going fleets were transporting countless high-yielding crops back.

Qingzhou Taishan Academy, the School of Physics, is testing a latest invention - a car!

Not an internal combustion engine, but a steam engine car.

Ma Jun has been involved in steam engines for more than ten years, and it can be said that almost all designs have been perfected.

Many people say that it is impossible for a big man to make a steam engine from scratch.

But in fact, the principle of a steam engine is very simple. What is more complicated is the internal design and material issues.

As long as that layer of window paper is pierced and the emergence of genius inventors, the historical process of mankind will take another step forward.

Ma Jun is the genius inventor.

As the most outstanding inventor and creator recorded in history books in the late Han Dynasty, his obsession with mechanical structures is unimaginable to ordinary people. Especially after systematically studying physics knowledge, he became like a duck in water.

His ability is no worse than Watt's, and he even has countless genius-like ideas. Even if the repeating crossbow invented by Zhuge Liang is in his hands, its power will be increased five times.

This shows that he is full of fantastic ideas for complex internal structures.

Now, with the blessing of theory and the strong support of the state, he has made rapid progress, and has a large number of assistants who also love inventions and creations, step by step to enhance his various genius creations.

He spent more than ten years studying steam engines all day long. The efficiency, operating speed, design concept, and size of steam engines were all compressed to the extreme.

The only thing missing now is the materials.

The asbestos rope was too bulky, and its sealing performance was not particularly good. The output of Eucommia gum was too small, and the temperature was too high and it easily melted. The most perfect rubber was still on the way, so Ma Jun could only think about new inventions and creations.

In fact, they have developed the electromagnetic theory of magnets and copper coils, but it is feasible to produce electricity, but it is difficult to store electricity, and Chen Mu doesn't know how to do it.

After all, the production of lead-acid batteries is not taught in junior high school physics or high school physics, so you have to keep experimenting.

This process may be very long, maybe several years, maybe decades, but with luck, it may be produced soon. Therefore, the Dahan Power Grid is currently on hold.

And there are other small inventions, such as improving steel-making technology, forging new molds, researching various new agricultural production tools, manufacturing new spinning machines, etc. In addition, I just want to think of other uses for steam engines besides trains.

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Such as mining, spinning, lathes, pumping, excavation, etc., as long as it is a repetitive mechanical work, the steam engine can be used. So he thought, since it can drive a train, can it be made into a car for personal driving?

Following this idea, Ma Jun immediately started taking action. Finally, after half a year of hard work, he developed a steam-powered car. It had a very unique appearance. The front and rear of the car were very large, and the middle cockpit was much smaller.

It's because the rear of the car is a steam engine and the front of the car is a mechanical box.

Coal is added to the rear of the car to provide steam power, and then the power is transmitted to the mechanical box at the front of the car through pistons and levers to achieve the purpose of rolling the front wheels. Since there are no tires and they are iron wheels, it is estimated that it will feel like driving.

Not comfortable.

However, Ma Jun adheres to the spirit of a craftsman and has to test the gadgets he invented by himself. After completion, he conducted a test run in the huge two-square-kilometer square of the School of Physics, which is the square where trains run.

The noise of this test was much smaller than that of the train, because when the train is running, the train has a special track, and it is just a locomotive. Even if it derails, it should not cause any casualties.

But this time is different. Steam cars are used to drive on the road without fixed tracks. The most important thing is that the brakes designed by Ma Jun are based on the bicycle brakes designed by Chen Mu. Although there are measures such as closing valves and blocking steam,

But none of these can achieve the effect of stopping the car immediately.

According to Ma Jun's own calculations, even after closing the steam valve and applying the foot brake, the vehicle will still have to sprint forward for a certain distance due to inertia. And if a steel car weighing one ton loses control, the consequences will be unimaginable.

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Therefore, the audience at the scene was very small. Only a few of Ma Jun's assistants and some talented and talented students could enter and watch, and they all stood relatively far back on the high platform.

"Master Jockey, this thing is not very controllable. Are you sure you want to run it? Why not let me go."

An assistant was worried about Ma Jun's safety and tried to dissuade him.

Ma Jun waved his hand: "I... I... invented something by myself... I... tried it myself."

His stuttering is still very serious.

Seeing that the dissuasion was ineffective, the assistant had no choice but to help him up and said: "The horse master must pay attention to safety."

"I...I know."

Ma Jun sat in the driver's seat, took a deep breath, and asked his assistant to shovel coal behind him.

Soon the gululu water boiled and the whistle sounded. Ma Jun opened the valve to let the steam flow and bring a steady stream of power.

Then the vehicle started to move, its wheels rolling slowly.

The first steam engine car in later history traveled very slowly, only reaching 4 kilometers per hour, which was about the same as walking.

But Ma Jun had already studied the steam engine very thoroughly. The steam engine he made had a high level of craftsmanship, high utilization rate, and fast operation, reaching a speed of 15 kilometers per hour, and it was quickly started.

The huge square was empty. Since the ground was paved with cement, although it was made of iron tires, it was still relatively stable. There was a slight bump along the way. Apart from feeling pain in his butt, Ma Jun watched the speed getting faster and faster.

, and even more excited.

This means that in the future, even without taking a train, an ordinary person will be able to reach the county seat of Pingyuan County, which is more than 300 miles away, from Linzi within ten hours by relying on steam engines and automobiles.

After all, this is currently the longest cement road in Dahan.

After driving for a while, Ma Jun was not only excited about the success of the experiment, but also dissatisfied with the results of the experiment.

This thing still has many shortcomings, the most typical one is that it is too slow.

The maximum power of the steam train manufactured by Ma Jun can reach 60 to 70 kilometers per hour on the rails.

However, steam engine cars are four times slower than trains due to their heavy weight, small power source, solid iron tires, and inability to add multiple power cabins like trains.

Even though the speed of 15 kilometers per hour was almost the same as riding a horse, Ma Jun was still very dissatisfied, so he was thinking about how to continue to improve.

While he was thinking about it, he lost his mind and didn't notice the road. When he came back to his senses, he suddenly realized that he was less than a hundred feet away from the wall.

Fortunately, he reacted quickly, turned, closed the steam valve, and stepped on the brakes at the same time.

However, the tires were too heavy, so if you wanted to turn, you had to pull the rocker in advance to deflect the path, which made the steering speed extremely slow. It took me a while to finally turn the car from a straight line into a diagonal one.

But it's of no use.

Because even if you walk diagonally, you will still hit the wall.

So Ma Jun could only place his hope on braking.

Of course, the iron tires weighing hundreds of kilograms cannot be stopped at will. The steam engine no longer provides power, but the inertia is still rushing forward.

The only good news is that the speed is indeed decreasing, from 15 kilometers per hour to 7-8 kilometers per hour.

It is relatively safe to jump out of the car at this speed, but Ma Jun is afraid that if no one is in control, the car will crash directly through the wall and continue to rush forward. If a student passes behind the wall, the consequences will be disastrous.

Therefore, he could only continue to press the brakes, hoping to stop before hitting the wall.

"Squeak, squeak, squeak!"

The screeching brake sound kept coming.

The distance is getting closer.

Ma Jun opened his eyes wide, and everyone present had their throats hanging out.

Fortunately, there was no problem with all the parts. The foot brake was pressed to the end, and with a violent sound, the car finally stopped.

The front of the car hit the wall, creating a hole in the wall and making a huge noise that could be heard by half of the college.

Due to different course times, there happened to be many students nearby who had no classes and were walking outside.

I saw with my own eyes a huge round object that smashed through the wall and stretched out. Many students were frightened and rushed over to watch.

"What new gadget did the School of Physics invent?"

"This thing looks dangerous."

"In the past, there were explosions every day in the School of Chemistry, and there were only banging and banging sounds in the School of Physics. Now the School of Physics has also started to explode?"

"Shh, keep your voice down. There's Palace Chief Ma sitting on top of that thing. If the Palace Chief hears it, I'll give you a demerit."

Taishan Academy originally had Zheng Xuan as the priest, Guan Ning, Bing Yuan, Wang Lie, Cai Yong and Chen Mu as the palace administrators, equivalent to the principal and five vice principals.

Later, Zheng Xuan retired, Cai Yong served as the priest, and Chen Mu and Bing Yuan resigned one after another, leaving three vacancies.

Ma Jun was the elder of the academy, so he was promoted to palace chief and dean of the School of Physics.

Now Mr. Ma Gong's face looks very ugly.

The braking distance was one hundred feet. To him, such an uncontrollable distance was no different from the failure of the experiment, so he was in a bad mood.

Countless students were watching outside the wall. He didn't like to show his face in the first place, so he got out of the car expressionlessly.

The assistants came over one after another and said worriedly: "Master Ma, are you okay?"

"Master Horse, are you injured?"

"Horse Master?"
To be continued...