Of course, it's too early to think about the issue of pension.

Therefore, the day after returning to the palace, Li Yuanjing visited the research institute located across the wall of the palace, which outsiders called the north courtyard of the palace, but Li Yuanjing preferred to call it the research institute.

There are not only iron smelting research institutes, but also many seemingly unimportant research institutes, including Wang Henian's courtyard.

Although it is too inferior to other research institutes, the medical books and battlefield ambulance that Wang Henian fabricated here have been fully promoted in the Haizhou Army, and it is not easy to say whether the effect is big or not, anyway, there must be.

Of course, this model must be correct, and the only thing that needs to be tested is whether the set of medical books and methods fabricated by Wang Henian can stand the test.

However, this time Li Yuanjing's focus is obviously not here, but goes straight to a courtyard without a listing, next door to the Iron Smelting Research Institute, in order to facilitate research and reduce unnecessary trouble, Li Yuanjing even asked people to open a door between the two courtyards.

When Li Yuanjing came, a group of people were gathered in front of a big guy who was one person tall and had sad faces, obviously, they also encountered problems that were difficult to solve.

"Your Highness!" The person in charge, Yu Guang, was transferred from the mechanical workshop, and he was quite talented compared to others in this regard, and when he saw Li Yuanjing coming, the wrinkles on his forehead deepened.

Li Yuanjing's trust in himself naturally goes without saying, such an important thing is left to himself, and he also explains the principle so clearly, especially under the premise that other cooperative research institutes have come up with results, but he has encountered unsolvable problems on his side, which makes him feel a little disappointed Li Yuanjing's trust in himself.

"What's the situation?" Looking at the steam engine that had obviously taken shape, Li Yuanjing was a little puzzled why these people had such expressions? Could it be that this is just a spectacle?

Li Yuanjing's expectations for the steam engine are still very high, not to be able to build a more advanced steam engine, as long as he can build a usable, and stable operation of the steam engine, he is very satisfied, and even in terms of power, his requirements are very low.

There is always a process for everything, and it is impossible for these people who are first exposed to these things to come up with the ideal things, which is unrealistic.

In terms of the use of steam engines, this is not to mention, just say that at present, once the research is successful, it can be used in excavators and other mechanical equipment first, and at this time the current version 2.0 can be eliminated.

Version 1.0 is purely human, and version 2.0 is powered by animal power, with manpower providing direction assistance.

However, whether it is version 1.0 or version 2.0, there is a big drawback, when mechanization is in its infancy, the power provided by these two is not enough, so although the efficiency has been improved, it still does not achieve the expected results.

And with the steam engine, all problems can be easily solved, and, the 3.0 version of the excavator or something, Li Yuanjing thinks that you can consider the structure of the air pressure rod, although the difficulty is still there, but as long as you can solve this problem, the efficiency will be increased dozens of times, or even hundreds of times.

In addition, it can also be used in weaving workshops, of course, these are all later words, at present, what Li Yuanjing wants to do most is steam ships, and the real leapfrog development of the Age of Navigation began after the advent of the Steam Age.

Needless to say, the effect of this kind of continuous and stable power is that the journey that used to take a month can now be completed in ten days, or even less, and it does not require a lot of people to row the boat, and there is no need to wait for the day to sail like a sailboat.

In fact, when he saw this steam engine that had already taken shape, Li Yuanjing was still a little excited in his heart.

"Leaking ......" Yu Guang's face was a little depressed, the principle of the steam engine is actually not difficult, the difficult thing is the material, as long as there are enough suitable materials, for a person who knows the principle, it is only a matter of time to build him, it is nothing more than no experience, the design is not very reasonable, but this kind of building a few more can find the most suitable.

What you know, and what you don't know, can't be compared to what you don't know.

And Li Yuanjing has also told many times before that the most important thing for the steam engine is the gas produced, the less gas runs out, the stronger the power he can provide, otherwise the materials are not less, and the coal is not less burned, but the effect is not much.

"What about the others?" Li Yuanjing's originally excited mood suddenly plummeted, and air leakage was a big problem.

And if this problem is not solved, all the next expectations cannot be carried out, because everything must take into account a factor of air leakage, and if it is a shipbuilding, it is necessary to consider the problem of waterproofing.

The best choice is to use rubber, but there is no rubber here, most of the rubber in later generations is produced in Southeast Asia, but Li Yuanjing can be very sure that the rubber tree was brought here from South America, and at this time period, there is probably no rubber in Southeast Asia.

"There is basically no problem with the rest, the new bearings have been made, they used a new method, the steel balls are very rounded, not used for load-bearing words are not a big problem, and with the black oil ...... made by the oil mill" Speaking of this, Yu Guang felt even more embarrassed, but he still had to bite the bullet and say: "The problem of air leakage has always existed, although the subordinates have tried a lot of methods, but these are either not good, or they will not last long to break, even an hour of hard work is difficult to survive, but after using these two new things, The power has improved compared to before, and they say that the black oil has been tested on several excavators and found that it has significantly saved a lot of effort. ”

"Black oil?" Li Yuanjing was stunned.

Yu Guang immediately asked people to bring some black oil and show it in front of Li Yuanjing, Li Yuanjing looked at it carefully, and grabbed some more, it was sticky, it didn't feel particularly thick, and the lubrication could be clearly felt when the two fingers were rubbed together.

Li Yuanjing knew what this thing was, he had seen this thing, but now this one was still a little different from the one he saw, but he couldn't see it in detail, and he felt that it was very different.

The so-called black oil, in fact, is a kind of failed industrial butter, or a cheap industrial butter, mostly used in some low-end factory industries, the machine is in high demand, with that kind of high purity butter is not cost-effective, and with this kind of words, although the effect is not as high as the purity, but there is no problem with changing it diligently.

I don't know if I don't see it, after reading it, it really surprised Li Yuanjing, I left for more than half a year, I didn't expect the bearings to be there, even the lubricating oil is there, as for the problem of air leakage, although he is also difficult, but at present, it seems that as long as the problem of air leakage is solved, other problems are basically no problem.

"Hehe, Your Highness, you're finally back! A taste of the fruit? I grew ...... myself."