After a few months of busyness, I have finally completely relaxed. Pen ~ fun ~ pavilion www.biquge.info

At the regular meeting the next day, Li Hongfei broke up early after explaining to Li Dingguo about the formation of a tutor.

The cabinet team has been set up, and it is time for the heads of various departments to make decisions on all matters.

When the boss is so tired, what is the difference between it and Zhu Youzhen at the beginning?

However, after learning the lesson of yesterday, Li Hongfei did not go home immediately, so as not to be embarrassed to stay together, after all, there is a super big light bulb at home.

Li Hongfei, who had nowhere to go, simply went out of the city and went directly to the weapons research institute.

The newly established weapons research institute is located in the northeast corner of the capital, near Majiazhuang, about ten miles out of the city from Dongzhimen.

Majiazhuang terrain is dangerous, facing mountains on three sides, the only southwest corner of the entrance, but also by the Grand Canal, as long as an army is stationed on the side of the Grand Canal, the whole Majiazhuang will completely fade from people's sight.

The degree of secrecy in conducting weapons research here is much higher than that in the Baoshan Industrial Zone.

As for the army stationed, Guo Sheng's special forces are currently in charge for the time being, and when the instructor is established in the future, this will be the joint residence of the instructor and the weapons research institute.

Li Hongfei and a group of people crossed the Grand Canal by boat everywhere, and soon entered the Majiazhuang area.

The wharf on the bank of the river has been set up, and a large ship is unloading cargo on the wharf.

Li Hongfei glanced at it, in addition to food supplies, there were also a large number of metal materials on the cargo ship.

A large amount of copper and iron was needed to build weapons, and there were no such ores in the capital, and even the coal mines were only a few small coal mines in Tongzhou, eighty miles east of the capital.

Fortunately, Majiazhuang is mainly used for the research and development of new weapons, and does not require many metal materials, relying on waterway transportation, which is enough to ensure the supply.

As for setting up a weapons production line, Li Hongfei had already chosen a place, that is, Fengrun, Hebei Province, not far from Beijing (the area where Wu Sangui stayed when he returned to Beijing, that is, where Tangshan was later located), where there was not only coal, iron, but even a large number of copper mines, which was completely a copy of the Baoshan Heavy Industrial Park.

Of course, even if the Ming Dynasty has experience, it will not be able to complete it in a short period of time, and now the most important thing is to put the Shilling Weapons Research Institute into operation.

"I've seen Zuo Xiang-sama." The voice of the sentry on the shore interrupted Li Hongfei's train of thought.

Li Hongfei found out that it was an acquaintance, and immediately said: "Xue Zhen, are you on duty today?" What about Guo Sheng, what are you doing? ”

There are too few special forces personnel, not to mention Xue Zhen, the squadron leader, even if it is Guo Sheng, he occasionally has to stand guard on duty.

"Commander Guo is testing a new type of hot air balloon in the back mountain, do you want to enter the back mountain, or let us inform the commander to come and see the adult?" Xue Zhen asked.

"Test hot air balloons? It's kind of interesting, I'll go find him. Li Hongfei returned.

Progress has been slow since the development of the hot air balloon, and now that the special forces have begun to test this equipment, it is enough to show that the hot air balloon should have achieved a breakthrough...........

Soon, under the leadership of the two soldiers, Li Hongfei took a carriage to the experimental site in the back mountain.

originally wanted to witness the demeanor of a hot air balloon, but at this time, in the back mountain, except for Song Yingxing and other scientific researchers, let alone a hot air balloon, even Guo Sheng himself did not see it.

Li Hongfei had no choice but to approach a researcher who bowed his head to write experimental data, and asked in a low voice, "What about Guo Sheng?" ”

"Guo Sheng? Fly away in a hot air balloon! The researcher replied without looking up.

"! Fly......... Fly away! Where did it go? Li Hongfei was shocked.

Didn't you say experiment with hot air balloons?

With so many test personnel present, do you need an Air Force Commander-in-Chief to conduct the experiment himself?

And the hot air balloon used to be dragged with a rope, but now it has begun to fly officially, even Li Hongfei can't help but be shocked in his heart.

What does a hot air balloon flight rely on, it completely depends on the wind, and if the lifting problem cannot be effectively solved, who knows where it will float to?

"How are you ......... Eh, I'm sorry, but I didn't know you were here. ”

The researcher just wanted to be angry at this guy who disrupted his thinking, but when he looked up, he found that it was Li Hongfei, and he was directly instigated.

"It doesn't matter, I just want to know, where is the progress of your research, and is there any danger in manned flight?" Li Hongfei did not pay attention to the researcher's impolite behavior.

He also knew that he was a little impatient, the hot air balloon thing had matured in the artillery unit, and the researchers were not sure, and it would not be easy for people to go to the sky.

As for complaining that people let Guo Sheng go on an adventure, this kind of thing is just that his mind hasn't turned a corner for a while.

Guo Sheng's life is worth money, but other people's lives are not worth anything?

What's more, Guo Sheng and others have a lot of experience in piloting gliders, at least they are in the sky, but they can deal with various emergencies more effectively than experimenters.

"It's a dream! If you want to know anything, just ask the old decay. It's impossible to say that there is no danger in this hot air balloon flight, but compared to a glider, it is still a lot safer. A voice came from the side.

It turned out that Song Yingxing found out about Li Hongfei's arrival, and the old man talked a lot, and it seemed that he was in a good mood.

"What do you mean old, the problem of free lifting and falling of hot air balloons has been solved!" Li Hongfei quickly understood.

"This problem has been solved a long time ago, and we have installed a control valve on the hot air balloon, which can control the size of the fire at any time, and can completely ensure free lifting." Song Yingxing said with a smile.

In the past, hot air balloons were very rudimentary, completely enlarged versions of Kong Ming lanterns, which only filled the air bag with air (not sealed helium or hydrogen, just normal air), and heated the air through the device to make it lighter and gain lift.

Unless the fuel is exhausted, the balloon will keep rising, and it is unclear whether it will be able to break out of the atmosphere, but it is absolutely possible to keep rising into the air and eventually freeze people to death.

So in order to ensure safety, but also to prevent it from drifting away with the wind, the bottom of this hot air balloon must be tethered with a rope.

Now, through improvement, the researchers have installed a control valve on the heating device, which is similar to the alcohol stove used in the hot pot in later generations, and the flame intensity can be controlled at any time by increasing or decreasing the heat release area.

"In fact, it is not difficult to install control valves, and what we have been studying over the years is what kind of fuel to use to replace the bulky wood." Song Yingxing said again.

Using wood burning, a hot air balloon can be lifted into the air, but the carrying capacity is far from Li Hongfei's requirements.

Because the amount of wood that can be loaded in a hot air balloon is limited, increasing the amount of wood loading will undoubtedly increase the volume of the hot air balloon, and the larger the volume, the greater the heat consumed during liftoff, so it falls into a kind of dead loop, the volume of the hot air balloon is getting larger and larger, but the load capacity has not been able to increase much.

"Can you think of a replacement?" Li Hongfei asked.

In fact, in his heart, he already has a substitute, just to see if Song Yingxing and they can also think of it.

"Fierce fire oil, only fierce fire oil, which is flammable and burn-resistant, is most suitable for hot air balloons." Song Yingxing replied.

Sure enough, he and Li Hongfei thought of one place.

The so-called "fierce fire oil" is actually a petroleum refined.

The earliest oil drillers in history were the Huaxia people, and the earliest oil wells appeared in the 4th century or earlier.

The Huaxia people use a drill bit fixed to one end of a bamboo pole to drill wells, which can reach a depth of about a kilometer.

At first, the Chinese people only burned oil to evaporate salt to make salt, and around the 10th century AD, the Chinese people began to use pipes made of bamboo poles to connect oil wells and salt wells.

The term "oil" was first coined in the Taiping Guangji compiled by the Northern Song Dynasty of China in 977 AD.

The official name "oil" is based on the outstanding scientist Shen Kuo (1031-1095) of the Northern Song Dynasty in China in his book "Mengxi Bi Tan" based on the oil "born in the sand and gravel of the water, mixed with spring water, and came out in confusion".

Before the word oil appeared, foreign countries called oil "black gold", "devil's sweat beads", "glowing water", etc., while in China it was called "stone grease water", "fierce fire oil", "stone paint" and so on.

As for "petroleum refining", the beginning of the age is even earlier, the Northern Wei Dynasty's "Water Jing Note", written about 512~518 AD, the book introduces the refining of lubricating oil from oil.

The British scientist Joseph pointed out in a related paper: "In the 10th century AD, oil was already available in China and was used in large quantities. It can be seen that before this, the Chinese people distilled and processed the oil. ”

At present, the Ming Dynasty's oil smelting has tended to be the peak of the world at that time, and the fierce fire oil is used as a military weapon on the naval warships.

It can be seen that Song Yingxing can think of using fierce fire oil as fuel, not that Li Hongfei leaked in advance.

"Therefore, the hot air balloon that Guo Sheng took this time is a new type of hot air balloon fueled by fierce fire oil!" Li Hongfei said.

"That's right, General Guo is not riding alone this time, there are five researchers on the hot air balloon, after all, we will not let a general with great achievements face danger alone." Song Yingxing couldn't help but teased.

It seems that Li Hongfei's previous performance still made this national treasure-level professor feel a little unhappy.

"Look at what you said, Guo Sheng's guy is going to take a risk, I'll talk a few words at most, if it were you, I'd rather stop this project than let you take this risk." Li Hongfei did not deny his previous gaffe, and by the way, he also patted Song Yingxing's ass.

"I said why every time I wanted to participate in the experiment, I was stopped! Dare to love is your kid's ghost! ”

However, the horse's fart slapped on the horse's leg, and Song Yingxing seemed to understand something, and he didn't appreciate it at all.

The most important thing in scientific research is practice, and many problems must be personally participated in by Song Yingxing in order to understand the shortcomings.

As a result, Li Hongfei accidentally revealed that Song Yingxing was not allowed to participate in any dangerous experiment, which made him feel no emotion.

"Forehead........ That, by the way, Song Lao, you said earlier that a hot air balloon will carry six people (Guo Shengjia five researchers), so how big is its specific carrying capacity? Li Hongfei began to change the subject.

"The details have not been calculated yet, and the final result can only be obtained after they land, through the counting of remaining fuel, and a series of extreme tests. However, from the data obtained so far, including fuel, the load of 2,000 catties should not be a big problem. Song Yingxing said.

With a load of 2,000 catties, that is, one ton, even if 500 kilograms of fuel is removed, it can carry six to eight heavily armed soldiers, and if it is simply used to drop bombs, it is easy to carry 500 kilograms of bombs.

This is only a preliminary calculation, and it has already reached Li Hongfei's original expected goal.

It seems that the Daming Air Force is really expected to form combat effectiveness.

"So how long are they going to fly and where to land?" Li Hongfei asked eagerly.

He couldn't wait to see this new hot air balloon.

"Today is a southeast wind, and the destination of the test personnel is Juyongguan in the northwest, which is about 100 miles away. Song Yingxing said.

The only flight power of a hot air balloon is the wind, but since the wind is at different altitudes, there will be different directions and speeds, and the pilot can choose the appropriate altitude according to the direction of the flight.

Can control the precise flight of the hot air balloon, that is basically experienced pilots, Guo Sheng, a group of novices, the first flight test, on the special full run of nearly 100 miles, you must know that there is the Ming border, and the hot air balloon is not well controlled, it is possible to fly out of the border, these people are really not ordinarily brave.

However, Li Hongfei also understands that with the current positioning level of the Ming Dynasty, the only thing that can be accurately positioned is the Great Wall.

However, people are already in the sky, it's too late to say anything, and what they can pray now is that Guo Sheng and others don't fly too high, otherwise they won't land too late to see the Great Wall, and it is really possible to fly across the border, in case the rescue is not timely, Guo Sheng may become the first "captured" air force general in history.

"It seems that the first thing that the hot air balloon did was to draw a map of the whole country." Li Hongfei muttered to himself.

Without a positioning system and landmarks, the Air Force still has a long way to go before it can be equipped with an advanced delivery vehicle such as a hot air balloon.

"In terms of maps, in fact, General Guo has already begun to send people to start drawing, otherwise we wouldn't dare to fly so far this time." Song Yingxing said.

Drawing a high-altitude map is actually very simple, and the military's artillery detection balloon is the best high-altitude mapping tool.

In the past few months, from Majiazhuang to Juyongguan, almost every ten miles or so, a hot air balloon will be raised, and professional surveyors will draw a map directly at high altitude, and then stitch it together, connecting the city with a high-altitude plan map from Majiazhuang to Juyongguan.

Guo Sheng also relied on this picture to dare to fly straight to Juyong Pass.

"It turns out that you all want to go to the front, yes, but just with your little people, it's far from enough, what I need is the high-altitude plan of the entire Ming Dynasty, so let's do it, in a few days I will transfer people from the National Security Internal Service Department to come over to help, in terms of drawing, I believe these people are not bad." Li Hongfei said.

If you want to draw a high-altitude plan of a major city across the country, you really have to rely on the professional spies of the internal service department, after all, people's basic skills are mapping, compared to the complex ground environment, drawing in the sky is simply cheating.............