On the 14th day of the first lunar month of the 18th year of Chunxi, today is the holiday of the Special Administrative Region.

According to the rules of this era, the three-day carnival has been a folk custom that has been delayed for hundreds of years. The most lively one is the Lantern Festival on the Lantern Festival on the Lantern Festival. Although the Special Zone has a word "special", Mao Geng has always followed the local customs. Therefore, all departments of the Special Zone, including workshops and companies, have three days off. In addition, the Special Zone has arranged various lanterns to add atmosphere to the festival.

Of course, there are many people working overtime today in the SAR. According to the plan, a party will be organized on the night of the 15th. Mao Geng had this idea last year, but he gave up later. This year, many time travelers joined. After everyone thought, the Spring Festival Gala in later generations was a repertoire program that the people like, so it would be better to have such a show in the Song Dynasty. This is of course a good thing, but the director of the chief director Lao Qiu Zhang Luo, and Lao Qiu led a group of people to rehearse. At that time, Mao Geng only needs to be a single audience and it is OK.

At this time, Mao Geng was in the steam engine workshop, guiding a group of people to test the latest three-inflat steam engine. Now Mao Geng is responsible for only a few projects, and the steam engine project is the most important one. Before that, the steam engines manufactured by the Special Administrative Region were all single-cylinder steam engines. For travelers, the disadvantages of the single-cylinder steam engine are obvious. Technology upgrades are inevitable. Three-inflat steam engines are the inevitable choice for ocean-going ships. The technology of the three-inflat steam engine must be overcome.

Yes, the steam turbine is the first power output machine developed by Mao Geng. However, the initial speed of the steam turbine is too high, and it is usually necessary to install a speed reduction mechanism, such as a gear reducer. At the beginning, Mao Geng did not take the gear reducer seriously, but practice has proved that in this era, the difficulty of gear reducers is not average. Although Mao Geng forcibly built two gear reducers, what is painful is that the failure rate of these reducers is not ordinary, so that when the ship is driving, the gearbox has problems and has to stop the steam turbine for maintenance. Fortunately, Mao's steamships are generally hybrid, and there are problems with the power of the steam turbine. There are sails, so it is slower and it will not be able to drive.

In fact, the three-inflated steam engine is actually no essential difference from a single-cylinder steam engine in principle. As the name suggests, the three-inflated steam engine is a series work system for three-stage steam expansion. Its starting point is to squeeze every thread of energy in the steam and let the waste heat of the steam be fully utilized.

The three-inflated steam engine is composed of three ever-increasing single-action cylinders. The high-pressure steam output from the boiler first promotes the first and smallest piston movement to perform work. Given that the steam discharged from the first-stage piston is still in a medium-pressure state, it is a pity to discharge or condense directly. Therefore, the human method is to let it pass into the second stage, that is, the medium-sized piston chamber, and push the second-stage intermediate cylinder to perform work. The steam discharged from the second stage cannot be wasted, so the smart humans created the third stage, and the low-pressure steam discharged from the second stage passes into the third and largest piston chamber, and promotes the third-stage piston to perform work. Until the waste heat is exhausted, the steam discharged from the third-stage piston chamber has no value for work, so it is passed into the condensation device to condense as condensate to replenish the boiler water, realizing the "water-steam-water" recycling.

This is the three-expansion steam engine, which is the pinnacle of the steam engine. Since it is the pinnacle, its complexity is of course not comparable to a single-cylinder steam engine. For example, its crankshaft is extremely difficult to process.

As for the design of the three-inflated steam engine, although it is not a very difficult task, for Mao Geng, after all, this is not an unattainable mechanism, it is nothing more than a piston crankshaft connecting rod mechanism and sequential intake and exhaust mechanism. In theory, if a single-cylinder steam engine is able to design a three-inflated steam engine, it is possible to design a three-inflated steam engine. The four-inflated rod mechanism is the most rare part, but this thing is not difficult at all. Mao Geng has a huge advantage, that is, it is not a single person fighting. Mao Geng has a Mao team that is constantly improving, and the combat effectiveness of this team is obviously getting stronger and stronger. Sometimes, as long as Mao Geng gives his disciples a guide, his disciples can independently develop certain technologies.

The most important thing is that technological development is a money-burning business, but Mao Geng is not short of money. With money, the development progress is guaranteed. For example, in order to develop this three-inflated steam engine, Tan Xiaochun led a group of wood workers to make six sets just by making wood models. The last three-inflated steam engine model is one-to-one, and it is very ornamental when running. The air inlet and exhaust ports are opened and closed in sequence, the piston reciprocated, and the crankshaft rotates, everything is orderly, and it seems that it is almost no different from the teaching models used by later universities. The piston chamber is naturally cut open and making these models is used to simulate and verify all the actions of the steam engine starting. Among them, the first five models are all failed models, but it must be said that without the first five models, there is no last successful model. Failure is the mother of success. Sincerely, this is true!

After the boiler is raised, it is not possible to obtain high-pressure steam in a short while. The waiting time is a bit long, so Mao Geng pulled Zhao Yuchun to the technical room and asked someone to make two cups of tea, waiting while drinking tea.

The model was placed in the technical room, with a layer of varnish on it. Zhao Yuchun stroked this ornamental model and was very amazed:

"Haha, it's so exquisite! It's also very accurate! Without computer simulation, it's not difficult for Chief Executive Mao to have any problems. This simulation method is really good!"

Mao Geng smiled and said:

"What's strange about this! Isn't it just to build a nuclear submarine in the later generations that made wood models first? Facts have proved that this method of making wood models is very powerful. I just plagiarized it. The copyright can only be said to be a copycat version. Haha!"

What Mao Geng said is a true story of later generations. It is said that the Celestial Empire had never done nuclear submarines, and there was no idea how to put a nuclear reactor. So someone proposed to make a 1:1 nuclear submarine model first. Making this model is a big project. For a time, the busiest person in the nuclear submarine development department was actually a group of carpenters. These carpenters were skilled. The model of the nuclear submarine was completely made of wood at a ratio of 1:1. It has realistic internal organs, and even the phone inside was made of wood, which looked vivid. Later facts proved that this practice was simply a stroke of magic, and it is said to be a critical turning point to accelerate the development of nuclear submarines.

When he heard this classic story from later generations, Zhao Yuchun smiled and said:

"Teacher Mao said it well. This method is very powerful. Whether it is our armored vehicles or tank vehicles, they are all wooden models to open the way. It is necessary, haha!"

Mao Geng smiled and said:

"It's a long way to go! At this moment, the boiler has to be made of copper. Many places are not enough to use steel riveting technology to build boilers, let alone water pipe boilers. I don't know how the British used riveting technology to build boilers in history. Alas! It seems that among us, we only know about welding technology to build boilers."

Zhao Yuchun could only smile bitterly. In the 21st century later, the welding technology was so great that fools would use riveting technology to build boilers. Besides, even if you want to use riveting technology to build boilers, no one dares to use it. The Safety Supervision Bureau will cause trouble for you.

However, Zhao Yuchun didn't think the welding technology was difficult, so he patted his chest and said:

"Teacher Mao, anyway, riveting is a transition technology. Let's just use welding directly. The welding machine is simple, just a transformer. As for welding rods, it is even simpler. A steel core, brush a layer of medicine on it, and then you can do welding. Power generation is not difficult now. The energy efficiency of converting mechanical energy into electricity is lower. Anyway, just generate electricity. With electricity, you can be used to be a welding machine by winding two coils, and we can we welding. Whether it is to build boilers, iron armored warships, or iron armored warships, it is a piece of cake."

Mao Geng looked at the guy who was born in the next generation who was engaged in agricultural machinery and said everything was so simple, is it that simple?

"Old Zhao, do you know the ingredients of the skin on the welding rod? I can't figure out the lines, it's not as easy as you said!"

Mao Geng used a lot of welding rods in later generations, but he really couldn't understand the composition of the layer of medicine on the welding rod. It seemed that the layer of medicine on the skin was very particular.

"To be honest, Chief Executive Mao, I have a friend who made welding rods in my later generations. The better skins are like titanium oxides. Ordinary welding rods, and the skins are iron oxides and feldspar and marble powder. Use some water glass to bond them to make skins and dry them for a while. It's the welding rod. In my opinion, it doesn't necessarily have any technical content."

"That's how it's easy to find iron oxides and stone powder, but what about water glass?"

"Haha, it's easier to water glass. Just during the reform and opening up, there was a contractor in my hometown who produced waterproof materials in a conventional way. The key was to produce water glass. You guess how they produced it. They burned quartz sand and soda ash in the stove, and then there was water glass. Haha, they made a fortune with this trick."

"Oh, awesome!"

Mao Geng sighed that later self-employed people really dared to do anything. That kind of copycat spirit is both admirable and terrifying.

Just as he was sighing, Tan Xiaochun pushed the door and handed Mao Geng a letter to him.

When Mao Geng saw it, he knew that it was a Feige's letter sent by Wen Yuan of Lin'an. The problem was that this was a Feige's letter with a high level of secrets. He didn't know what happened in Lin'an. Wen Yuan actually wanted to use this set of advanced passwords.

Mao Geng had to say hello to Zhao Yuchun and said he had to take a step first, so he went straight to his chief executive's office.

After returning to the office, finding the password book and translating the content, Mao Geng was stunned on the spot.

What is this situation? Did Zhao Group take the wrong medicine? How could he suddenly think of going to Taiwan to visit the south?

If Zhao Shen really wants to come to Taiwan, would it be a blessing for himself and crossing the border? Could it be that Zhao Shen really intends to pass the throne to Zhao Han? No, according to Zhao Shen's temperament, it seems that he can't do anything like deposing the prince for no reason.

It seems that the Emperor of the Song Dynasty is not popular for going out for inspection. Well, just be the emperor and you can really go to the south. We have to make some preparations appropriately, such as what should be seen by Zhao Shen and what should not be seen by Zhao Shen. We have to have a problem.
Chapter completed!