When looking at the five trucks in front of him, even Li Yuanji didn't dare to imagine that just more than a month later, he was standing here again.

And there were five trucks parked in front of them.

Although the five trucks look ugly and have no beauty at all, what kind of appearance do the trucks in the experimental stage want?

It is important that these trucks can run smoothly and steadily.

As long as this can be done, everything else can be improved slowly.

The last time I was disappointed, there was disappointment with Jiang Tian, but more of it was helplessness with this era.

Really speaking, in fact, it doesn't have much to do with Jiang Tian, the ideas of an era can't be changed in a few years, they need time, and they also need time.

After going back, Li Yuanji also thought about this problem, and finally found that he had fallen into a misunderstanding.

As a person in power, you can have a beautiful blueprint in your heart, a future worth looking forward to.

But that can only be used as the direction and driving force for future development, no one can reach the sky in one step, no one can.

And what he needs to do is to lead everyone step by step towards that future.

The process is very important, and more importantly, to be able to see progress, as long as you can make a little progress every day, a few years, decades, will eventually accumulate to that height.

Although he has been working hard, he has to admit that the current Datang is a bit like a nouveau riche.

The explosion of technology, but before that, no one had any psychological preparation in this regard, and even most people didn't know what these were for.

The lack of an adaptation period, sudden success, can cause most people to lose themselves.

Impatience, of course, is a reason.

But after thinking about it, Li Yuanji realized one thing, the current Datang needs to cool down, and it must also cool down.

To pour cold water on people, one is to let them know that there is still a lot of room for improvement, and the other is to prevent self-aggrandizement.

So, after that, Li Yuanji never mentioned these things again, and even he had already begun to plan for next year.

It's just that Li Yuanji didn't expect that perhaps it was because of his own behavior that Jiang Tian was under tremendous pressure, and some solutions were proposed, so Jiang Tian worked hard, and finally built five trucks in more than a month.

This would have been difficult without the previous accumulation, but they had already done a lot of work in the early stage, plus a large number of processes were reduced or even removed.

Of course, a lot of things are the same.

"Your Majesty, the principle of these five trucks is the same, the only difference is that the size of the steam engine is different, and the installation position is different, so it also causes their volume to be different, and the matters that need to be paid attention to when using it are also different."

"The preliminary test was carried out yesterday, and the five trucks can run stably for three hours without any problems, and some tests have been carried out in terms of speed, but because of the influence of time factors, this has not been able to come up with an accurate data for the time being, and there are also some different problems that need to be solved." This time, Jiang Tian finally showed his face, and his self-confidence has also been greatly improved.

If he just didn't know anything before and went to do it, then in the face of Li Yuanji's inspection, there would inevitably be a lot of pressure on him, just like more than a month ago.

But now, five trucks are in front of him, although they have the same or different problems, but Jiang Tian knows where the problems are, and what problems should be focused on in the next step? This is something that has been put on the table, and in addition, Jiang Tian also has some other ideas in his heart that he wants to test, which are all the direction of the future.

"Tell me what's wrong?" Li Yuanji's attitude is no problem, but when it comes to getting down to business, he can't help but put on a serious attitude.

"First of all, the common problem of the five trucks appeared on the wheels, these rubber outer rings, the durability is very poor, yesterday only ran in the test site for more than three hours, plus other times of use, at most no more than five hours, but now they have become like this, according to this wear rate, it is estimated that the fast is ten days, the slow is a month, and an outer ring will be completely scrapped." Jiang Tian pointed to the tires of the car.

Li Yuanji looked in the direction Jiang Tian pointed and found that it was indeed as he said.

The tires look potholed, and even missing a piece in many places, so if you look closely, you can find that there are even some cracks on these tires?

And these tires, how to say.

Forget it, anyway, Li Yuanji has already figured it out, and it is impossible for anything to reach the peak from the beginning.

The problem of tires is the same, first of all, these tires are solid, and the manufacturing process is the same as making rubber strips, or rather, this is a solid tire that is directly poured, and the melted rubber is poured into the mold, cooled and solidified, the mold is removed, and even the special meow is polished.

Such tires can run fast to be strange, when it comes to rainy and snowy weather, the little prince who properly overturns, and when he arrives in a muddy place, he is absolutely skidding to doubt life.

Similarly, Li Yuanji also found another problem, these five trucks are large and small, probably determined by the size of the steam engine, but their wheels are exactly the same size.

If it was before, Li Yuanji would definitely point it out directly, but now, seeing the idea that he didn't point it out.

Now the whole Datang needs to cool down, and there are many ways to cool down, and the speed of various things is also a way to make them realize that there are still many problems that have not been solved, and there are still many unknown things that they have not yet discovered, so as to treat these things more seriously and cautiously.

It's not that something can be done as soon as it happens, so after a few times, there will be a contempt in my heart, and after a long time, it will not be so easy to change it back.

Seeing that Li Yuanji had no intention of instructing, Jiang Tian continued to talk about the problem of the five cars with some regret.

"This truck is made with the original steam engine, the scale is too large, the weight is too large, the load has not been tested, but in order not to affect the line of sight, only some changes have been made to the layout of the steam engine, which also causes the temperature of the entire front position to increase with the increase of use time, three hours later, even the back here is hot, the specific use has not been thought out for the time being, but he is definitely not suitable for the army." Pointing to the biggest truck.

Li Yuanji nodded, the army is not suitable, but some places are suitable, but he still did not speak.

Immediately afterwards, Jiang Tian also said the problems of the other four trucks one by one, and the big problems were basically nothing, they were all small problems.

Jiang Tian focused on the two smallest trucks, which were considered the most suitable for military use.

Although the power and load may not be as good as those big guys, but considering the actual situation of the road and the combat environment of the army, this kind of car is actually the most suitable.

Because it is small, because the load is small, which means that when the car is fully loaded, its weight is the smallest, which also means that under the same conditions, its passing capacity will be the best.

This time, Jiang Tian thought about it more comprehensively, and these two steam engines were also completely deployed in front, just on the side of the wheelhouse.

The water tank used for cooling on the outside is still about a meter away from the rear compartment, and there is enough space for heat dissipation, so there is no need to worry about the ammunition on the car being detonated.

Each of these five trucks has its own uses, but on the whole, Li Yuanji is quite satisfied.

Of course, Li Yuanji's satisfaction does not mean that Jiang Tian is also satisfied, and in his opinion, in addition to the problems that need to be improved, other aspects also need to be improved.

"What is this for?" Pointing to a steel bar under the rear wheel, Li Yuanji asked.

The rebar was thick, not too long, and just ran through the entire wheel, getting stuck between two rebar of the same thickness that slid down from above the wheel.

In fact, seeing this, Li Yuanji basically already had some ideas, this should be a handbrake, but he is not particularly sure.

And this handbrake is too inferior, completely dependent on people to operate, the most frustrating thing is that the premise of the operation must be to park the vehicle first, but the road situation outside is not only like this, what to do if there is a traffic jam in the middle of the slope? What should I do if my car breaks down?

"This is ......"

Sure enough, Jiang Tian's reply was the same as the result he guessed in his heart, which was the artificial handbrake.

Li Yuanji was subconsciously a little disappointed, because this was still designed according to the operating principle of the train, because the train had no brakes.

Yes, Datang's train has no brakes, and the station is all about deceleration in advance, that is, to stop the output of power, relying on its own inertia to stop, and after stopping, the train only needs to ensure a certain amount of pressure to make the train stop unaffected.

In the station, the tracks are all smooth, and some baffles are placed on the tracks to prevent accidental sliding when the train stops.

However, Jiang Tian's next words made Li Yuanji see some hope.

"Chen is going to study a way to solve this problem, and the current idea is that it can be controlled from the cabin, so that people can park the car there without getting out of the car. At present, the main idea is to use his brain in the transmission shaft, but this minister feels that it is not suitable, and the transmission shaft is suddenly stuck in the case of running, which not only has a great impact on the transmission shaft itself, but also has a great impact on the rear drive gear.

Another idea is to work on the wheels, which can reduce the impact on the propeller shaft and gears......"