Because the results of the hot air balloon test could not be known until the next day, Li Hongfei simply stayed at the weapons research institute to inspect the progress of the latest weapons research and development while waiting for news from Guo Sheng. Pen, fun, and www.biquge.info

Song Yingxing and Li Hongfei exchanged a few words, and then took the assistant back to the laboratory first, the hot air balloon was lifted off today, but a lot of experimental data has been collected, and these things still have to be sorted out quickly.

The person in charge of receiving Li Hongfei was Huang Minggang, deputy director of the Beijing Division Weapons Research Institute.

"Qingyang Crossbow King Huang Minggang" was originally a righteous man who accompanied Yan Yingyuan and defended Jiangyin City.

Because he was good at using the bow and crossbow and was proficient in the art of mechanism, he was favored by Bi Maokang and invited him to join Suzhou Heavy Industry and accept him as a registered disciple (Huang Minggang led the art to invest in the teacher, but could not become a disciple), and passed on his firearms casting skills.

Now that Bi Maokang is old and unwilling to travel long distances, he decided to send Huang Minggang to Beijing to assist Song Yingxing in presiding over the weapons research institute, while Bi Maokang himself stayed in Baoshan Industrial Park to recruit apprentices and cultivate talents for the follow-up military research and development of the Ming Dynasty.

For Huang Minggang's technique, Li Hongfei still admires it very much, and the "Daming II Style" rear-loading rifle developed at the beginning, in terms of how to automatically unload metal bullets, Huang Minggang used his superb mechanism skills to help solve it.

So when the two were greeting, Li Hongfei passed on his knowledge about rear-loading rifles to each other.

The bolt-action rifles, semi-automatic rifles, and fully automatic rifles of later generations were not much different from the original single-shot rear-loading rifles in their firing principle.

The only thing that needs to be improved is the internal mechanical structure, such as increasing the capacity of the magazine, changing the single round to multiple rounds, based on the "Daming II rifle", adding a magazine at the ammunition loading port, and loading several bullets at a time can effectively increase the rate of fire of the rifle.

Another example is the more advanced principle of automatic firearms.

As we all know, the reason why automatic firearms can automatically complete the mechanical actions such as loading, firing, and throwing shells is that almost all of them use gunpowder gas as the power source.

Of course, Li Hongfei has not learned this knowledge, so he can only explain it in general, not only through the recoil force formed by the explosion of gunpowder, but also through the recoil force formed by the explosion of gunpowder, the barrel is affected by the thrust and causes the barrel to move backwards, and drives the bolt and other parts to complete the automatic cycle.

These things are simple to say, but for people who don't understand the principles, they are as obscure as a book from heaven, fortunately, Huang Minggang is proficient in mechanical techniques, plus the weapons research institute, and there are many mechanical experts who have been abducted from Europe.

In fact, with Li Hongfei's half-level, in addition to being able to talk wildly, his real hands-on ability is not even as good as the apprentice of the weapons research institute.

If you weren't worried about these experts, you would waste a lot of time and come up with a gun like the Ten-Eyed Gun, the Kidnapper Gun, the Thunderbolt Gun, and the Five Thor Machine Guns........ A series of bizarre things, Li Hongfei really doesn't want to point fingers in front of these weapon masters.

There are some things that should be detoured to learn from experience, but they still have to go, and some things that seem to be feasible but are just chicken ribs, Li Hongfei doesn't want researchers to go further and further.

The two chatted until late at night, and Huang Minggang got up and left unsatisfied, it is not difficult to imagine that this guy will not be able to sleep tonight............

Early in the morning of the second day, the guards came with the news that Guo Sheng had returned to the Weapons Research Institute.

"It's so fucking exciting, labor and management almost flew out of the customs and started with the Tartars!"

Before Li Hongfei approached, he heard Guo Sheng's loud voice shouting there.

"You don't know, this sky flying and walking on the ground are completely two concepts, when we saw Juyong Guancheng, it was too late to land, fortunately I improvised, and continued to fly forward for more than ten miles, just landed in Jundu Pass."

Sure enough, Guo Sheng and the others did not arrive at the scheduled location.

"Jundu Pass" is the famous Badaling Great Wall in later generations, located in the north of Juyong Pass about ten miles, is the northern barrier of Juyong Pass, only after passing the Jundu Pass, can really cross the border of the Ming Dynasty.

Although there were no major accidents in this test flight, it also exposed a problem, that is, the error was too outrageous, and it was a full 10-mile journey, which was undoubtedly a fatal flaw for the Daming Air Force, which could only carry out infiltration operations with small forces.

There were so many errors, and before the attack began, the enemy discovered and formulated corresponding tactics, but it was not as good as the long-distance attack of the special forces and the concealment of ground infiltration operations.

"That's right, the commander-in-chief of the Ming Air Force, personally experimented with hot air balloons, neither fell to his death, nor rushed out of the border to be captured, his luck is indeed good." Li Hongfei opened his mouth for a while.

Li Hongfei's resentment towards Guo Sheng is not ordinary, this is not a playhouse, you are a high-ranking general of the Ming Dynasty, it is inappropriate to use equipment that is still being tested, and you are still alone (the other few people are scientific researchers, basically no combat effectiveness) When you are not completely sure, you approach the border area.........

Once there is an accident, no one can afford this loss.

"Uh....... The Prime Minister is here. Guo Sheng, who was still bragging just now, instantly softened.

"What about you? Are you a general or a soldier? If you can't stick to your job, then I will notify Li Dingguo, ask him to remove you, and arrange for you to be a tester at the weapons research institute! Li Hongfei pressed forward step by step.

"Prime Minister Qi, the last general knows that he is wrong, and the last general should not be derelict in his duties!" Guo Sheng admitted his mistake very quickly.

It's okay to get a stimulus once in a while, and there's no need to actually be a tester.

"Okay, just this once, a fine of three months as a weapon research fund, if there is a repeat offense, it will not be spared!" Li Hongfei accepted it when he saw it.

"The last general will admit punishment!" Guo Sheng understood that this matter was over.

"By the way, how does it feel to fly in the sky?" Li Hongfei returned to the topic.

Since he is a tester, he naturally has to have a beginning and an end, Guo Sheng quickly talked about the flight process: "Everything else is fine, but it feels a little cold." ”

This was only flying at a low altitude of six or seven hundred meters, but Guo Sheng still felt the chill, knowing that it was already June at this time.

"Fortunately, you're not stupid, you didn't fly too high, otherwise it wouldn't be cold, and if you don't carry cotton clothes, you might freeze to death." Li Hongfei didn't have a good airway.

"Why is this happening? Isn't it the closer you get to the sun, the hotter it gets? Guo Sheng said curiously.

"You don't understand it. What else does it feel like besides being cold? Li Hongfei was too lazy to talk nonsense, and asked directly about the next topic.

Explaining the altitude temperature difference to these people is tantamount to playing the piano to a cow, even if the people present are all top scientists in the Ming Dynasty.

"And then there'........ I feel that the wind direction and speed are slightly different at different altitudes. Guo Sheng said.

In order to collect the test data in sufficient detail, in addition to the thermometer, wind direction and wind speed tester, this hot air balloon is also equipped with the latest magic detection device imported from the West: barometric altimeter.

Barometric altimeter, as the name suggests, uses atmospheric pressure at different altitudes to detect the height of the instrument from the ground.

The inventor of the barometric altimeter was the famous Italian physicist and mathematician, Evangelista Torricelli, at the end of 1643.

When Li Hongfei wanted to launch the hot air balloon project, he sent people to pay attention to various European inventions and quickly learned about the barometric altimeter.

Although Evangelista Torricelli did not accept the invitation of Daming to go to Daming to "pan for gold", he was also generous and passed on the manufacturing method of barometric altimeter to Daming scientists.

It is no wonder that the Renaissance is going on in Europe, and scientists will make the latest research results public as soon as they discover them, so as to counter those conservative forces.

In Europe during this period, any scientific research and technology was open and transparent, not as clumsy as in China, and there was even a conservative idea of passing on men but not women.

It can be said that if the Ming Dynasty does not carry out reforms, even if there is no threat from the Manchu Qing Dynasty, the development of science and technology will soon fall into disadvantage.

Okay, the topic is far away, let's go back to the issues that Guo Sheng talked about before.

Because of the altimeter, Guo Sheng and others not only felt that the higher the balloon rose and the lower the surrounding temperature, they also felt the wind direction and speed very obviously.

At first, they thought it was just a normal decrease or increase in the wind, so they didn't care.

But then as it went up and down, it started to feel more and more pronounced.

As a result, the researchers began to record the trajectory of the wind at each altitude, and the final result was as expected, there were many differences in wind speed and direction between 100 meters and 200 meters at a height, and even the greater the difference in height, the more obvious the difference, and after returning to the previous altitude, even if it was different, the difference was very subtle.

From this, the researchers came to the conclusion that the wind direction is different at different altitudes, different times, and different places.

Because the hot air balloon does not have a rudder, its direction of movement must be with the wind, so if you want to adjust the direction, you need to find different wind layers, only experienced pilots, can control the flight trajectory of the hot air balloon well.

For a novice like Guo Sheng, it is normal for an error of ten miles.

"Lord Li, in fact, after this flight, I found that this hot air balloon is difficult to control, and if you want to fly long distances, you have to depend on the weather conditions, except for artillery surveying and mapping, it is difficult to have much military use." Feitian's enthusiasm subsided, and Guo Sheng began to face up to the shortcomings of the hot air balloon.

Before he flew, Guo Sheng was still full of confidence in this new equipment, but after he actually flew once, his mood quickly fell.

The carrying capacity has indeed been enhanced, and the air-dropped bombs that Li Hongfei said at the beginning can indeed be realized, but the fact that he cannot control the flight trajectory has vetoed all the above benefits.

Take bomb dropping as an example, if you can't fly accurately over the enemy, even if you have a strong carrying capacity, it is a waste of ammunition.

And this thing is like a pawn in chess, only advance and not retreat, a charge into the enemy's territory, unless you never land, circle the earth and come back, otherwise with such an eye-catching target as a hot air balloon, landing will definitely die.

Not only hot air balloons, but also gliders, which do not have much military use, are not even as good as cavalry charges.

"I knew that the Air Force was such a bunch of, so I might as well command my own First Army!" Guo Sheng thought secretly.

Because he heard that the Ministry of Defense wanted to build the First Army into an all-cavalry unit, his heart had already begun to itch.

"What, do you regret taking over the Air Force?" Li Hongfei guessed what Guo Sheng thought.

"This.......... I can't talk about regrets, it's just that the brothers of the Air Force are all elite generals, and it is indeed a pity that they can't form combat effectiveness here. Guo Sheng said euphemistically.

He couldn't say that he didn't want to stay here, so he could only use a group of soldiers under him as cover.

"The Air Force has the advantage of the Air Force, not to mention anything else, the high-altitude penetration ability of hot air balloons, as well as the deterrent power, are not comparable to ordinary ground forces, and it is normal for long-distance flights to have errors, but if it is a fortified city that is trapped on all sides, let you break into the city from outside the city downwind and drop bombs, this will also be an error? No matter how big your error is, as long as a bomb can blow up the enemy barracks, the shock caused by it is no less than dozens of heavy artillery! Li Hongfei said.

Military equipment that can be used for hundreds of years is almost nothing of chicken ribs, even if the hot air balloon can only be reduced to civilian equipment in later generations, it is because of the emergence of new equipment that can restrain it.

In today's Ming Dynasty, and even in the whole world, a military equipment that can fly in the sky is undoubtedly a hegemon-level existence, and the divine soldiers descend from the sky, not to mention how the combat effectiveness is, but the blow to the enemy's heart is far more shocking than hundreds of thousands of troops.

Guo Sheng and others are not interested in hot air balloons, that is because they know this equipment too well, and the unknown is the terrifying existence.

"The lesson of the adults is that the last general understands, from now on, the last general will order his soldiers to strengthen the driving training of hot air balloons!" Guo Sheng hurriedly assured.

"Actually, the hot air balloon is just a transitional product, and I will not order the production of too much, the real equipment of the Ming Air Force......... It's an airship! After suppressing Guo Sheng, Li Hongfei took the opportunity to throw out another R&D project.

"Airship?" Guo Sheng didn't know why.

Not to mention him, even the surrounding scientific researchers have never heard of this kind of thing at this time.

"That's right, it's an airship. The hot air balloon has become mature by now, and there is not much room for improvement, so you can consider stopping the research. It's this airship, it's the equipment that my Ming Air Force really needs at the moment, and you still need to work hard! Li Hongfei said to the researchers present.

"Boom ........"

At this moment, the researchers on the side completely exploded.

It took four or five years and a lot of money to get the hot air balloon to make its maiden flight.

Now Li Hongfei said a word, but he wants to stop the research on hot air balloons, and instead launch other aircraft, although there are many situations on the first flight of hot air balloons, but there is no need to stop immediately..........