Great Tang Southern Emperor

There are actually two reasons for the enhanced effect of the plague. The first is to rely on the power of medicine to enhance the power of dysentery. As for the second, it is to use special drugs to stimulate the mutation of the source of dysentery, thus forming a new type of pathogen.

If it's the first case, it's easier to handle. As long as you can also find a way to strengthen the efficacy of the dysentery medicine, then the dysentery will naturally be solved, but the possibility is unlikely. How many medicines are there in the world?If you want to experiment one by one, how can there be such a simple thing?

If it is the second case, it is even worse, because it is actually a new type of plague.Although it evolved on the basis of dysentery pathogens, its properties are completely different from ordinary dysentery pathogens.Even if you strengthen the effect of dysentery medicine, it will only delay your death time.

Medicine is extensive and profound, and the effect of the plague has been enhanced so much. Who knows what kind of medicine the other party added, and whether there is any change in the middle?Even if you can enhance the efficacy of dysentery medicine, or enhance the efficacy of medicine, it will not work, because medicine is ever-changing, and no one knows what changes will happen when so many medicines are mixed.It may not be possible to produce drugs that just restrain powerful dysentery as you wish.Rather than you having the kung fu, you might as well just re-study the new type of dysentery and prescribe a new prescription. "

Fang Yiai exclaimed, "Ah? Then what should we do?"

"What is the specific situation, I have to go and see for myself, otherwise, even if the prescription is given, it may not be able to cure the disease." For the princess, Chen Tianlu also worked hard.

"Then I would like to thank Dr. Chen, and I will prepare manpower and medicinal materials." Xue Rengui expressed his sincere gratitude this time. He has been with Li Zhen for more than ten years, not to mention the relationship he has cultivated over the years.Let's just say that he has been by Li Zhen's side for more than ten years, and his whole body is covered with Li Zhen's marks. If something happens to Li Zhen, then his life will almost be over like this.If Chen Tianlu could really rescue Li Zhen, it would be tantamount to saving Xue Rengui's life and future, which would be of great kindness to Xue Rengui.

Fang Yiai asked Xue Rengui, "If you bring someone, how many are you going to bring?"

Xue Rengui thought for a while and said: "Your Highness only has 5000 people around, and the number is indeed a little less, so I am going to bring another 5000 people to His Highness, and make up enough 1 people for His Highness, so that even if something goes wrong, you can last for a while." time."

"5000 people?" Fang Yiai exclaimed, and then frowned: "If there are only 5000 people, how should we get there? Are we going to ride an elephant? Do you have so many elephants?"

Xue Rengui shook his head and said, "Your Highness has already contracted dysentery. Even if you ride an elephant, there is no time to climb up...I mean...how did you get here, and how do we go back."

"What? A hot air balloon?" Fang Yi'ai's complexion suddenly turned pale, and her voice was full of disbelief: "Isn't it? When I came here, I used to ride in a hot air balloon, and you still let me ride in a hot air balloon? Are you You really want to kill me, don't you?"

Xue Rengui asked back: "But besides the hot air balloon, do you have any other faster method?"

"Um... But I only have one hot air balloon, and there's no room for 5000 people." Fang Yi thought of another excuse in a flash of thought.

It's just that this reason is good, but facing Xue Rengui, he waved his hand to break it: "This is not a problem at all. We all know the principle of hot air balloons, and anyone can make them. As for the materials, you don't have to worry about it. Although Lin Yi It’s just a small country, but it’s also quite rich, and they should be able to find a lot of high-quality silk in their royal palace’s treasury, and it’s not a problem to make hundreds of hot air balloons.”

Of course, Fang Yiai will not give up so easily, and is still making the last resistance: "But so many hot air balloons are placed in the sky, and the target is too obvious. Doesn't this directly mean that you plan to rescue His Highness Yue Wang? There is also the wind direction, this What are you going to do? It's the north wind now."

Xue Rengui asked back: "The mobilization of 5000 soldiers and horses, even if it is not in the sky, do you think they will not be able to find it?"

"That's right, Brother Yiai, in fact, it's best to put soldiers in the sky." Wang Tianqi also came over to persuade: "Anyway, sooner or later the enemy will find out, so it's better to go to the sky. Think about it, if we start from the ground Let’s go, then the enemy will continue to cause trouble for us in order to stop us, but instead of flying in the sky, the enemy’s tricks can’t be used, unless they can control the weather—but how is that possible?”

"That's the reason. Not only is the speed faster in the sky, but you can also avoid the enemy's harassment. Isn't it killing two birds with one stone?" Xue Rengui said: "As for the wind direction, you don't have to worry about it. You have gone out to sea and sailed against the wind. It's not a big deal. As long as we also install a movable sail on the hot air balloon, flying against the wind should be no problem-if you can head against the wind at sea, there is no reason why you can't head against the wind in the air, right?

Wife, I know you have worked hard, but for the safety of His Royal Highness, you should suffer again. The big deal is, after reuniting with His Highness, I will apply for a long-term vacation from His Highness, so that you can take a good rest. How about ? "

"I..." Fang Yiai was speechless, he had already reached this point, what else could he say, after all, the situation was urgent, there was nothing wrong with that.In fact, Fang Yiai also knows that hot air balloons are currently the most efficient means of riding, and he is just complaining. If Xue Rengui really changes to other means, he will definitely object.

At this time, Bai Wuya suddenly suggested: "It's really not possible, why don't you let General Fang take control of the army instead of the general, and you are here to watch for us, and we will go find His Highness by ourselves."

"This is also a way." Duan Rui also agreed.

Xue Rengui was also moved: "Yi Ai, what is your attitude?"

After all, when it comes to prestige in the youth army, Fang Yiai is not inferior to Xue Rengui, if he were to lead these arrogant soldiers here, no one would object to it.

In fact, in terms of talent, Fang Yiai is not much worse than Xue Rengui, but he lacks the overall view and strategic vision, that is, he does not have the talent of a marshal and cannot lead the army alone.

Chapter 434 Flying Against the Wind (No.12)

Chapter 2 Flying Against the Wind (No.12)

But this is not important in the current situation, because Xue Rengui has only one main task at present, and that is to guard the two ports of Sangapura and Fuchun for the Tang Dynasty, and wait for the follow-up troops of the Tang Dynasty to come from the sea Accepting Linyi is all it takes, there is no combat mission, just need Fang Yiai to sit here and stabilize the morale of the army.

To be honest, this proposal is very much in the mind of Fang Yiai, but he just thought about it, and after thinking about it, he shook his head quickly and said: "No, I have to show you the way, otherwise, do you know where His Highness is? As for the situation here, it is enough for Junmai and Duhe to watch, I'd better go back with you, I'm really not in the mood to enjoy myself right now."

This is also one of the reasons why Fang Yiai came here. The place where Li Zhen is hiding now is too secret. If there is no acquaintance to guide the way, ordinary people will not find it even if they walk by.

"Alright, then I'll go buy and hand over the task with Mr. Du He." Xue Rengui didn't say anything, in fact, with their relationship, there is no need to say anything.

I guessed right with Xue Rengui. Although Linyi is a small country, but because of its long coastline and Buddhist belief, the decoration is very luxurious, and the living expenses of the nobles are even more extravagant. silk.

Now that Linyi has surrendered, the entire Sanghapra has become the possession of Datang, not to mention asking for a little silk, even if she wants someone's life, Fan Xueyi will immediately kill that person It was picked and given to Datang—there was no need for the Young Army to do it himself.

With silk as the airbag, the rest of the work is easy to handle. With the efforts of the Four Thousand Shenji Battalion, in just half a day, a total of [-] hot air balloons with rudders and movable sails were placed in Xue Rengui's house. before.

"Not bad, not bad, very good." Xue Rengui tried it in the sky in a hot air balloon, and Xue Rengui was very satisfied.

The craftsmanship of Shenjiying is still very good, and as he imagined, after adding sails and rudders on both sides, today’s hot air balloons can fly in headwinds—although the journey is far away (flying against the wind To take a zigzag route), but the speed is faster than flying with the wind, and overall it is not much slower.

This actually uses a 'Benoulli effect' often mentioned in aerodynamics, which is the so-called suction.

Take sailing boats as an example. Most people believe that sailing boats are pushed by the wind, and sailing with the wind can make the boat get the fastest speed.

Is this really the case?

In fact, it is not. The sailboat cannot achieve the best speed when the wind is completely downwind. On the contrary, it can only reach high speed when the wind is headwind.

In fact, there are two forms of air force on the sail: one is dynamic pressure, that is, when the air flows, it can produce impact force on objects blocking the way.When a sailboat sails downwind, it is pushed forward by the dynamic pressure of the air, which is very easy to understand.The other is static pressure: when the air flows at different speeds on either side of the sail, there is a pressure difference.

why?

This is about to use the 'Bernoulli effect'.

This principle reveals that the place where the gas flow velocity is greater, the static pressure is smaller; upper drum).In this way, the side with a small gas flow velocity generates a lateral pressure on the side with a large flow velocity, and this force is the static pressure.When the sailboat sails against the wind, it is driven by this static pressure.

Why can a sailboat sail "against the wind"?

The reason why a sail can generate static pressure is because the sail has an arc like an airfoil.

The same is true for the wings of an airplane. Due to the different shapes of the two sides of the wing and the sail, when the airflow flows through the wing or the sail, the airflow velocity on the top of the wing and the protruding side of the sail is faster, and the airflow on the other side is faster. Flow rate is slow.The pressure at the place where the flow is slow is stronger than the pressure at the place where the flow is fast. It is this pressure difference that makes the wing generate upward lift and also makes the sailboat gain forward momentum.

When keeping the bow of the boat at an angle of 30-40 degrees to the direction of the sea wind, the propulsion efficiency is the highest.

在2000年8月，法国人设计的“hydroptere”号帆船在风速只有15节的情况下，速度却达到了35节（略低于70公里时速）。这一点是不是非常反直觉？但这就是客观事实。

The hot air balloon designed by Xue Rengui also uses this principle. Of course, he does not understand what is called the "Bernoulli effect", nor does he know what suction is, let alone how great his theory is.

He only came up with this idea when he saw the sailors adjusting the sailing direction and the angle of the sails against the wind when he was sailing at sea, so that the sailboats could get faster speeds—it was also sailing with the help of wind, since the ships all If it can be done, there's no reason a hot air balloon can't do it.

There were 100 hot air balloons, [-] of which were filled with people, and [-] were filled with various medicinal materials—because it was unknown what kind of dysentery Li Zhen was infected with, Xue Rengui directly swept across the entire Sangapura. All the pharmacies have grabbed a lot of medicines in them, which requires more than [-] hot air balloons to load them.

After the handover work was completed, Xue Rengui entered the hot air balloon with the selected five thousand elites in an orderly manner. Under the burning of the flames, the airbag made of silk slowly inflated, and finally drove the hanging basket below to rise slowly.

After rising to a certain height, the soldiers on the ground cut the rope with a knife, and the hot air balloon completely broke away from the ground and began to fly to a higher and freer sky.

More than 600 hot air balloons went up to the sky together, the scene was quite spectacular, at least the people on the ground were excited to see it, and even Linyi people who didn't know it had already started to kneel and kowtow to worship.

"Wow, this speed is so fast, even faster than when I came here." Standing on the hot air balloon, feeling the wind blowing in front of him, Fang Yiai suddenly became energetic for no reason, standing in the hanging basket Hu xiao yelled, it was completely gone from the wilting look it had before, it looked like a plagued chicken.

He was happy, but in another hot air balloon next to him, Xue Rengui (as for why the two are not in the same hanging basket, I believe everyone understands, it is the same as the reason that eggs cannot be put in the same basket) has already complained. Spit—this is completely different from your sister's imagining of riding the wind and flying through the void?Why is the shaking of the hot air balloon so violent, which is completely different from the feeling of going to the sky before.

But he didn't know that before going to the sky, there was a rope tied to the bottom, the stability was extremely strong, and naturally there would be no bumps, but now it is rootless and invincible floating in the sky, and the speed is so fast , It is strange that there is no bump.

It's just pity for Xue Rengui, a generation of men who can fight tigers and catch dragons when they go up the mountain, they can only hold on to the edge of the hanging basket, and almost spit out their own bile, even the antiemetics prescribed by Chen Tianlu are useless.