There is nothing difficult in the world, only afraid of people, no matter how big the difficulty is to overcome one day, with the unremitting efforts of Yang Cong, the problem of steam locomotive steering and wheel linkage has finally been solved, and at this time, half a year has passed.

This progress cannot be said to be fast, nor can it be said to be slow.

To say fast, Yang Cong is just painting a scoop based on a gourd, which is not a redesign at all, it took half a year, which is really a bit long.

To say slow, the difficulty of this thing is not ordinarily small, and Yang Cong is not a professional designer, so it is good to be able to complete it in half a year.

The next step is the manufacture of the carriage and the overall assembly, Yang Cong and Wang Xuanyi combined, for the sake of insurance, or to install four groups of steam engines of about one foot to the steam locomotive to ensure the output strength.

There was little technical content in this work, it was just an assembly process, and within a month, the first steam locomotive sample was available.

On this morning, after the o'clock was still over, Yang Cong took his disciples to the railway around Yuyuantan in high spirits.

At this time, the steam locomotive was already full of people, three layers inside and three layers outside, there were disciples from the School of Physics, students who came to admire, and people who came to see the excitement nearby.

It can be said that these people were all recruited by Yang Cong, because he had already issued a notice that an important test would be held this morning, and all the disciples of the Physics Academy must be present to observe.

The disciples of the School of Physics knew, their relatives and friends naturally knew, their relatives and friends knew, and many other related people naturally knew, plus Yang Cong did not stipulate that others were not allowed to come to watch, so both sides of the railway were naturally surrounded by people at this time.

This guy, this steam locomotive is really magnificent, ten zhang long, one zhang high, one zhang wide car, placed there like a section of the city wall, these years, who has ever seen such a big car, who would be bored to build such a big car.

Moreover, in order to please Jiajing, Yang Cong deliberately ordered someone to make the front of the car look like a dragon's head, the dragon's eye is the cab, the dragon's nose is the chimney, and the entire carriage is surrounded by golden copper scales.

The people who watched the excitement were talking with relish, and the students of the School of Physics couldn't help but whisper there, as soon as Yang Cong arrived, the buzzing discussion suddenly stopped, and everyone looked at him with respect, that appearance was not pretended.

At this time, Yang Cong's reputation is not covered, although he does not have the name of a sage, but he has already been praised as a sage.

The sage-like figure is here, so don't you hurry up and stand up!

Yang Cong was already accustomed to this meeting, he smiled and gestured around, then strode through the passage automatically let out by the crowd, came to Wang Xuan's side, and said with a little excitement: "Sir, are you ready?" ”

Wang Xuan also said excitedly: "It's all ready, the firewood is lit, and the water in it has been boiling for a while, and it is estimated that it has already been opened." ”

When Yang Cong heard this, he couldn't help rubbing his hands and said in a trembling voice: "Okay, I'll go up and try it." ”

After that, he was about to go to the ladder of the locomotive.

Seeing this, Wang Xuan hurriedly grabbed him and persuaded: "Qingfeng, it's dangerous, no one has ever driven this thing, what if something goes wrong?" Didn't you say that many experiments are dangerous, and if you don't do it well, you will die? Or I'll go, you're watching here. ”

Yang Cong shook his head again and again and said: "Then what's the matter, haven't you opened it yet, I still have a charter in my head, do you have it?" ”

This one!

When Wang Xuan heard this, he couldn't help but stop talking, he thought about it, but still shook his head and said: "No, Qingfeng, you are our backbone, if something happens to you, what should we do?" ”

Seeing this, Yang Cong couldn't help but laugh and said: "Hahahaha, what can happen to this, it's a big deal, I'll drive slowly, an iron lump is slowly crawling on the ground, are you still afraid that something will happen to it?" If something happens, it's something it hits. ”

When Wang Xuan heard this, he could only say helplessly: "That's okay, I'll go with you." ”

After that, he followed Yang Cong and was about to walk towards the suspension ladder.

Seeing this, Zhang Juzheng and other disciples couldn't help shouting: "Teacher, I'll go too, and I'll go with you." ”

Yang Cong waved his hand directly and said, "Okay, you guys just watch from below, there are not so many people in the carriage." ”

Indeed, the carriage at this time is actually a locomotive, and there are boilers, copper pipes, steam engines, and spare firewood and water.

After Yang Cong got into the car, he immediately sat in the driver's seat, that is, the left longan, while Wang Xuan could only sit at the right longan to accompany him.

At this time, the water in the boiler was already boiling, and billowing green smoke was already rising from the two dragon noses, Yang Cong calmed down his excitement, and then shouted: "Whistle, ready to drive." ”

When Wang Xuan's disciple heard this, he hurriedly opened the valve of the whistle.

"Uh......h Woo...... Woo........ ”

A majestic and distant whistle sounded, and the people around were stunned.

This whistle is also "designed" by Yang Cong, although whistles and flutes are very common in these years, but no one has ever seen something like a whistle that makes a loud whistling sound as soon as it is opened.

Is this sound the legendary dragon chanting?

Before the crowd could react, the steam locomotive in the shape of a dragon head had already started slowly with a whistling sound.

At first, Yang Cong didn't dare to drive too fast, he just opened the valves of the two sets of steam engines, the thrust was still a little small, and the steam locomotive was really slowly "crawling" on the rails, which was slower than the speed of ordinary people walking.

However, this is amazing enough, because such a big guy, no one pushes and no horse, can actually move on his own, and before he wants to change it, who can believe it.

When the crowd around thought that this "fire dragon car" was at this speed, Yang Cong suddenly gritted his teeth and opened the valves of the other two sets of steam engines.

This guy, it's terrible, the steam locomotive suddenly accelerated as if he had taken medicine, and the speed was getting faster and faster, faster and faster, at the beginning, people could keep up with it when they ran slowly, but they couldn't keep up with the people running hard in the back.

The speed is almost like a galloping horse.

On the steam locomotive, Wang Xuan looked at the flying scenery on both sides, and couldn't help but say nervously: "Breeze, fast, quickly close those two sets of valves, this speed is too fast." ”

Is it fast?

Maybe a little.

However, this speed is much slower than that of later trains.

Besides, the railway around Yuyuantan at this time is a circular track, no matter how fast it is, it will never start anyway, and it will only circle around Yuyuantan.

Yang Cong said unhurriedly: "This speed is not too fast, but it is indeed a little too fast when turning and entering the pit, and it is too slow when only two sets of steam engines are turned on, which is indeed a problem." ”

With that, he turned off the valves of the two sets of steam engines and sat there in deep thought.

At this time, they designed a two-side drive, that is, two groups of steam engines drove the wheels on both sides at the same time, so each time they drove two sets at the same time, it was not impossible to change to drive together, but the mechanical structure was more complicated.

He thought about it for a while, but decided to adjust the air pressure so that it would come faster.

Thinking of this, he pointed to the steam valve and said: "Sir, we have to improve this thing, we can't open it all at once, close it all at once, add threads, slowly open or turn it off slowly, so that the speed of the entire steam locomotive can be controlled at will." ”

When Wang Xuan heard this, he pondered for a while, and then nodded and said, "No problem, I'll take someone to change it after I try it." ”

()