With the experience of the excavator as a guide, the roller or anything is actually not complicated, it is a simple control room, plus the drum can be done.

At most, it is to modify the rear wheels as steering, and then add the power output of a steam engine, as for whether it is simple or not, it is a problem that does not need to be considered, as long as it is durable and easy to use, everything else is a floating cloud.

The number of steam engines is not large, and most of the current steam engine workshops have moved to Haizhou, and the small guys of the past have long been eliminated.

After getting a satisfactory result, they set their sights on a larger steam engine, which was to propel a thousand-stone, or even a thousand-stone-class ship.

However, there are still two steam engines that were originally experimented on in Chang'an, and this is still after Li Yuanjing took that one to sea, and the rest of the people were bored.

This is something that has been upgraded on the basis of that one, and the No. 3 machine has suppressed the No. 1 machine in all directions.

With the help of some of the remaining steam engine researchers, it was not a problem to put the steam engine directly on the roller.

However, it is not completely without problems, both the specifications and weight of the steam engine exceeded Cheng Chuliang's own expectations.

So a lot of the previous things can only be temporarily abandoned.

"......" looked at the behemoth in front of him, it was Li Yuanjing's heart for a while.

"What are you doing?" Li Yuanjing directly called Cheng Chuliang over and reprimanded.

"Your Highness, there is no way, the main reason is that the steam engine is too big, and the previous design can't be installed, so I changed it temporarily, but the effect is very good." Cheng Chuliang responded with a smile.

Today, Li Yuanjing came forward to invite Li Chengqian and the officials of the Ministry of Industry to come over, and the appearance of a machine that can greatly shorten the construction period is indeed worth their half-day visit.

And Cheng Chuliang actually didn't tell the truth, the steam engine was too big was just one of the factors, and the other factor was that the bigger it was, the more shocking it was, and the more shocking it was, the better it was to cheat money......

His old Cheng family is also counting on being crowned king overseas in the future, what kind of king does he have no money? When you get to the place, you can't live in a thatched house?

"It's on! Here we go! Your Highness, you will be blown away after reading it! Cheng Chuliang pointed to the audience excitedly and said.

I saw that the road roller, which was still accumulating, began to move slowly, and in front of it was the loose soil that had only begun to be laid after Li Chengqian and the others came.

The thickness is about 20 centimeters, the length is about 100 meters, the roller slowly passed by, and walked forward smoothly for more than 20 meters, Cheng Chuliang couldn't wait to invite: "Your Highness, why don't you go down and check the effect?" ”

"Good!" Li Chengqian nodded solemnly.

Even if you just look at it with the naked eye, you can see that there is a significant difference between the front and the back.

"This ......" After seeing the effect, the official of the Ministry of Industry instantly looked at the roller that was still moving forward with a confused expression.

I have done a lot of projects in my life, what kind of strange events have I not encountered? But this is the first time I've encountered such a situation.

Cheat?

It doesn't exist, it's just an ordinary site below, the dirt is piled up after they came, and they even borrowed some guards to help, and the roller walked in front of them in person, and there is a place next to it that has not been pressed as proof.

"Your Highness, I'm afraid it will be able to meet the requirements by letting it go five or six times......" said the Ministry of Industry official with a shocked expression.

The others nodded in agreement, and a single point of normal road construction takes about a hundred times, although it does not seem like much, but this single point refers to the same place where the wooden stakes were smashed.

How big is a stake? According to this fact, it is thankful that a team can complete a two-meter project in one day.

But the roller is different, he just walked over like this, how much effort does it take? The roller has already covered half the distance, and according to the width that can be pressed three meters at a time, the length is one mile, and it is only half an hour each way, right?

According to the planned width of fifteen meters, if it is calculated according to eight times, that is, after using this thing, it will take about one day to build a mile of roadbed?

Even if there were other problems in between, it would be too scary to count as two days, right?

Li Chengqian said that the result was too scary, and the palace couldn't believe it......

"It's a good thing, but it can't be used!" While everyone was shocked, Li Yuanjing suddenly stood up and poured cold water.

"Why?" What Li Yuanjing didn't expect was that the first person to question was Li Chengqian.

"It's too big, it's too heavy, and although it's really efficient, there's another issue to consider, passability!" Li Yuanjing explained directly.

"Passing sex?"

"How many bridges do you think Datang has now that can support its past? The bridge in the mansion area is barely possible! Li Yuanjing said speechlessly, why did you get a road roller of tens of thousands of catties to come out and get a hair?

Everyone knows that bigger is better, if you don't have to think about anything, just get the steam engine used on the ship, one doesn't work for two, two if it doesn't work, three, just build the width to fifteen meters, and press it through it all at once.

But there's an egg? The terrain is so complicated, there are rivers, ditches and mountains, at present, the most wooden bridges in Datang are still wooden bridges, and the most small bridges are arch bridges, you let tens of thousands of pounds of rollers go to these bridges? I'm afraid it's not Shi Lezhi, right?

"Shrink, the weight is controlled within 2,000 catties, it doesn't matter if the effect is not good, if it doesn't work once, it will be twice, and if it doesn't work twice, it will be pressed twenty times, anyway, it's not bad for these few days." Li Yuanjing said directly.

Although the tonnage of the roller determines the grade of the road, it is also something that cannot be helped.

Again, Datang has no fighter jets, and no other vehicles, and it is enough to press dozens of times with a two-thousand-pound roller, and the effect is still no worse than now.

"Well, get a small one out as soon as possible!" Li Chengqian nodded clearly, turned his head and said: "Chief Pang, let's empty this piece first, and the other plans will remain the same, and after the new roller comes out, we will decide on the plan for this piece." ”

"No!"

"Your Highness, don't worry, we're a series, but the steam engine isn't enough right now, so we haven't done so much." Seeing that Li Chengqian's heart was moved, Cheng Chuliang hurriedly spoke, and at the same time kept hinting in one direction.

Soon, someone took three models, and Cheng Chuliang began to show off the models.

"This can be used to smooth the uneven place, this, can be used for the next fine-tuning, to ensure that the road surface is smoother, the roller will not be introduced, as long as there is this three-piece set, the efficiency of road repair is still dare to think?"