For the sake of safety, during the test, Zheng Peng invited Li Longji and Concubine Wu Hui to ten zhang away to watch.

Don't be afraid of anything else, I'm afraid of boiler blasting and boring, now the means are limited, and there is no specific standard for many things, so I can only grope for it, Concubine Wu Hui is very careful, let Zheng Peng also follow and stand a little farther away, and let him hand over the operation to others.

Those guards and craftsmen can have an accident, but Zheng Peng can't have an accident.

The test is in charge of Lu Ping's master and apprentice, Lu Ping is responsible for commanding, and the apprentice Zhuang San is responsible for the operation.

"Start igniting the heat." After Lu Ping got Zheng Peng's consent, he immediately issued an instruction to the apprentice to test it.

Zhuang San didn't dare to slack off, and immediately sent the charcoal lit in advance with a shovel into the burning furnace, and then began to add pulverized coal and coal, and asked another helper to agitate the bellows, and soon the boiling became more and more vigorous, and the water in the boiler began to produce steaming after boiling, and some interfaces sprayed white steaming from time to time.

"Your Majesty, the pressure is still rising, because the air pressure is not high enough to push the wheels to rotate, it will take a little time, please wait a little longer." Zheng Peng took the initiative to explain.

"I've been waiting for a few years, and I'm not in a hurry at this moment, just test it as usual." Li Longji said calmly.

Gao Lishi on the side finally interjected: "Champion, how long does it take to boost this pressure, don't you have to wait a day?" ”

"One day? No, no, about half an hour. ”

About half an hour later, I saw a sudden increase in the top of the steam engine. A puff of white smoke shot out, startling Gao Lishi, who suddenly blocked in front of Li Longji and Concubine Wu Hui, and shouted: "Escort." ”

At the sound of an order, more than a dozen imperial guards instantly surrounded Li Longji and Concubine Wu Hui in the middle.

"Don't be nervous, don't be nervous" Zheng Peng hurriedly reassured: "This is a pressure reducing valve of the boiler, when the pressure suddenly reaches a certain level, in order to protect the boiler from depressurizing itself, it's okay, it's okay." ”

After the imperial guards retreated, Zheng Peng briefly explained the principle, mainly emphasizing the safety issue, and then said proudly: "Your Majesty, Niangniang, look at it, the miracle moment is coming." ”

As if hearing Zheng Peng's words, Zhuang San pushed the conversion rod, and the sound of "boom" "boom" "boom" "boom...", the high-pressure steam began to slowly push the piston, and the piston transmitted the power to the rotating bearing, and in the creaking sound, I saw the iron wheel under the train and began to move slowly.

"Move... It's moving, Your Majesty, Niangniang, you see, the train is really moving. Colliers exclaimed.

The train is made of iron, even the wheels are also made of iron, it is very heavy, and the two carriages are full of stones, how heavy is that, no manpower, no animal power to pull, Gao Lishi feels that Zheng Peng is like a fool's dream, to say that something with mysterious power like gunpowder can be more reliable, that is, to burn a little fire, boil some water, which can make such a heavy train move forward?

Gao Lishi didn't believe it at the beginning, if it weren't for Zheng Peng's so many successful precedents, he would have questioned it a long time ago, when he first started, he thought that the train was a car related to gunpowder, and later learned that the fire was actually "burning fire", when Gao Lishi saw that the heavy train could move forward without manpower and animal power, his eyes almost fell.

"Ah" Concubine Wu Hui's eyes widened, her eyes were full of disbelief, if she had covered her mouth with one hand elegantly, she would have called out a long time ago.

Li Longji is the most calm of the three, but he is calm on the surface, but his heart is turbulent, you must know that Li Longji's thoughts are similar to Gao Lishi, thinking that the train is linked to gunpowder, but he didn't expect that it was just the coal and stone that Zheng Peng said, and the coal contained in the ancient book could be driven, and he was surprised for a while and didn't know what to say.

"It's moving, it's finally moving."

"The young master is mighty."

"Oh my God, you can really move, if you go back and tell the villagers that you don't need to be pushed by people, you don't need to be pulled by livestock, you can push an iron cart weighing thousands of stones forward with a little boiling water, and I guess I can't believe it if I kill them."

"Is it true that the young master has done a lot of good deeds, and the gods have appeared?"

The craftsmen and slaves who stayed behind to help were first dumbfounded, and then one by one they talked in disbelief, and some of the craftsmen jumped up in their arms.

"Boom", "Squeak... Squeak"

The sound of steaming pistons and the sound of train wheels turning were endless, Zheng Peng woke up from pride and surprise, and immediately began to check the operation of the steamer.

The cooperation between the two slave laborers is very tacit, one throws coal blocks, the other pulls the bellows to help the combustion, the two listen to the sound of the piston from time to time, and will also look at the performance of the air reducing valve, and decide the size of the fire as appropriate, obviously well-trained, the operation of the steamer is fast and regular, the overall operation is good, look at the wheels and rails, yes, the wheels and rails are not deformed or distorted.

Everything was fine, the only downside was ..... Slow.

It's really too slow, don't look at the steamer running loudly, the pistons, bearings and wheels are constantly running, but the speed is not fast, the speed is about the same as the speed of Zheng Peng's walking, if you go faster, you can walk to the front of the train.

Crunch squeak ....

The train kept moving forward, and when Zheng Peng was about to report to Li Longji for credit, he suddenly turned to the harsh sound of "Kaka", and the movement was not small.

Lu Ping, who was following Zheng Peng, changed his color abruptly, quickly checked it, and said to Zheng Peng with a panicked face: "Young master, it's not good, the bearing, it's that the bearing is not strong enough, please suspend the test." ”

During the shed test, the bearing did not bear such a heavy twisting force, you must know that the frame of the train is made of iron, plus the sinking steamer and the second carriage full of stones, the twisting force to withstand exceeds its load, when Lu Ping saw it, the heavy bearing has cracked and twisted traces.

With a "click", before Zheng Peng could order to stop the test, the huge bearing had broken, and the end of the piston was still rotating, scraping against the rails and sleepers, making a screeching sound.

Zheng Peng said loudly: "Stop testing." ”

When he heard that something was wrong, Zheng Peng hadn't screamed yet, Zhuang San had already asked the slave workers to stop putting fuel, and when he heard Zheng Peng's words, he closed the air inlet again.

Zheng Peng turned his head to look at the starting point, estimated it, and quickly counted it in his heart, don't look at the train running for more than a quarter of an hour, but in fact, it only walked a distance of 100 zhang, that is, more than 300 meters.

"The little one's incompetence has disappointed the young master, please punish the young master." Lu Ping's face was a little pale, and he knelt down on the spot.

If the usual test is okay, the failure will be repeated, but this time is different, the emperor and the mother came to watch it in person, that is to say, this test is related to the face of the young master, and doing well is to increase the face of the young master, if it is not done well, maybe it will make the emperor unhappy.

The emperor was unhappy, maybe the young master would be punished, and he felt that he had done something wrong, Lu Ping turned pale with fright, and hurriedly confessed.

"Please punish the young master." Zhuang San and a group of craftsmen saw that the commander-in-chief knelt down, and they didn't dare to slack off, and hurriedly knelt down to confess.

"Young Master" Lu Ping said with a look of remorse: "It's all small faults, it's the small ones that didn't test well, so that the young master lost face in front of the emperor and the mother, if the emperor blames, let the emperor give the little one a crime, if you want to kill it, you will never resent it." ”

"No, young master," Zhuang San on the side said loudly: "It's all small ones that haven't been checked well, and they have nothing to do with the master, so if you want to punish the small one, it's good to punish the small one." ”

Seeing the master and apprentice competing to confess their guilt, Zheng Peng paused for a moment and quickly smiled.