Based on the stronger Sand World True Element, the area of the sand wing that Hong Fan can maintain naturally expands.

Another time he descended from the cliff at the Taishan Col, he was 100% sure that he would do better.

However, passive gliding is too lacking in practical meaning.

One is that you have to use the drop to take off, and the other is that you can't control the time in the air.

If you don't solve these two problems, no matter how good the handling is, it's just a large parachute.

The first solution that Hong Fan thought of was naturally the aerodynamic shape of the aircraft in his previous life plus the engine.

As soon as his eyes are closed, he can immediately reproduce their turbine progressions, bypass ratios, mechanical structures, and so on......

But the current through-level sand and fire are completely unable to support him to change even the simplest internal combustion engine - not only precision, but also the limitations of high temperature and high pressure.

[The sand world itself has to maintain the body, and then the consumption of pushing the propeller directly is too great. 】

Hong Fan thought.

[The only way to achieve this in the Force Realm is to create an updraft. 】

There are only two most common types of longitudinal winds.

The first is ridge airflow caused by horizontal winds encountering obstacles (peaks), and the second is thermal convection caused by temperature differences.

Of course, he could count on the latter.

[Create an air intake channel at the front of the glider, heat it up quickly after the air intake, and then discharge it from under the wing.] 】

[I can't maintain a sophisticated engine structure, and I can't find a high-energy fuel similar to jet fuel.] 】

[However, I have the strength to carry fuel and use chemical reaction to heat it is obviously redundant......]

Hong Fan quickly recorded his thoughts on paper, and immediately had a model in his head.

There is no need for a combustion chamber, and a miniature honeycomb mesh ventilation structure is created with sand to maximize the contact area.

The expanded air, heated by the high-temperature sand net, provides power and lift.

Then he immediately began experimenting.

The result was a well-deserved failure, but Hong Fan smiled instead.

Many problems were exposed, including glider area, sand net temperature, sand structure strength, and so on.

However, these problems are not in quantity or quality, and they can all be solved by virtue of cultivation and refinement.

In his estimation, the threshold may be a clear situation.

After updating several topics, Hong Fan invested some more time in the Sand Flow Knife and the Desert Sand Battle Armor, seeking further optimization.

At this time, a dog barked outside the door, and the courtyard door was squeaked open.

After returning from shopping for vegetables, Aunt Liu and Tang Da hurriedly lowered their voices after entering the door, for fear of disturbing the young master's thoughts.

Soon after, the kitchen was filled with smoke and the smell of food, and the sun was setting in the west.

······

On the same day, late at night, Li House.

In the study of the head of the Li family, the lights are still on.

Li Heming and Li Shenji were seated, with four teacups on the table and two cups of tea poured.

At ten o'clock in the evening, the two figures easily avoided the attention of the guards and turned into the courtyard.

It was the two suspicious Wudang riders.

"Go open the door."

Li Heming said, picking up the teapot and filling the two empty cups.

Li Shenji turned around and opened the door, and sure enough, he saw that the guest was standing outside the door.

The door closed quietly.

Four people sit around, no red tape.

Li Heming raised his glass, and the two visitors sniffed the tea and frowned slightly, but they still accompanied a cup.

"We arrived in Jinhai in the afternoon, and this appointment with Hegong is for three things."

Pausing for a teacup, the young man with Danfeng's eyebrows spoke first.

"The first one is about the bottle of dragon heir essence blood."

Li Heming's face sank.

"The third time I went back, and I still didn't find it?"

"Didn't find it; All the corners had been searched, and only a stone coffin had been found, but it was empty. ”

Dan Fengyan shook his head and said.

"I don't think so; Because the 10,000 taels of silver tickets we gave before are also missing. ”

"Could it be that there is still a ...... missing?"

Li Shenji asked, but before he finished speaking, he was glanced at coldly by the two of them, and immediately stopped.

"Since the twelfth and thirteenth sons said that they couldn't find it, then they didn't have it."

Li Heming said.

"But the bodies of the three leaders of Haifei that day were all searched by Shenji himself, and they couldn't hide anything compared to the cave."

Both of them agree on this.

"With the preciousness of the essence and blood of the dragon heir, it is impossible for Wan Guangji not to keep it with him."

The Twelve Princes speculated.

"So I suspect that the thing is likely to be lost, and it is likely that it was secretly hidden by the Hong family or the Chi family."

Li Shenji felt a slight pain when he heard this—originally this bottle of essence blood was said to be his—but Li Heming's eyes were slightly condensed.

On the other side, the thirteenth prince spoke in a cold voice.

"Hmph, if Wan Guangji wasn't so wasteful, Hong Jian would have been left in Hongduo Mountain by us with a secret method!"

"The loss of a vial of dragon heir essence blood is nothing to our Nanhua Xiao clan - not to mention the damage caused by Haifei, at least Hong Jian's injury is confirmed."

"But the problem is that if they recognize the roots of something, we risk exposing our scheme."

At the mention of the word "exposed", the atmosphere was suddenly serious.

Especially the two members of the Li family.

Li Shenji's palms were sweaty.

Li Hemingyun made Zhenyuan perceive the inside and outside of the courtyard again.

"So we have to speed up our actions even more, and we have to make all the preparations by March."

Xiao 13 said in a deep voice, looking at Li Heming.

"What is the progress of those few things handed over to Hegong?"

I used an honorific title, but the tone was not very respectful.

"Half of it is already complete, and it will be all done by mid-February at the latest."

Li Heming seemed to be unaware of it, and went back.

"I am personally responsible, and the executors are the core children of the Li family, and there will be no mistakes."

"That's good."

The faces of the Xiao family were a little pale, and it was obvious that Li Heming's words still had weight in them.

"In the end, it's a plan to kill people with a knife."

Xiao 13 opened his mouth to talk about the third thing.

"The news that the three surnames of Jinhai exterminated Haifei and seized a large amount of goods, we have already passed it on to those families."

"In recent years, Huaiyang's national business taxes have increased and bandits have been numerous, and they have suffered heavy losses, and now is the time to be stretched."

"Haifei has robbed many of their caravans before, and most of the gold and silver you have recovered are their losses."

"Gong Heng is narrow-minded, arrogant and stubborn."

"With a little push, they will definitely bite the hell to solve the urgent need!"

"As long as Hong Jian is pulled out, and then there will be no swords and cranes, when the big thing happens, Jinhai City will inevitably collapse, and it is not impossible to erode the west of Liangzhou......"

Xiao Twelve said happily.

The two brothers looked at each other and smiled, as if they knew everything.

They immediately looked at the Li family father and son.

Li Shenji echoed and smiled, smiling a little reluctantly, while Li Heming just sat on the chair, not sad or happy, like a stone statue.

"Those who forsake are like yesterday, and they cannot be left behind."

Seeing this, Xiao Twelve persuaded him with warm words.

"Is it a pity for a city of ignorant grass people? The Li family lost a corner and won the world, which is a happy event! ”

As he spoke, he took out a piece of paper from his bosom and unfolded it, with fresh ink stains on it, apparently written not long ago.

Li Shenji's breathing became rough.

"This is the innate part of the "Interpretation of the Ox Dictionary", and it will be given to the Jinhai Li family today as promised."

Xiao Twelve looked at the eyes of the Li family and the young man glued to the paper, as if he was teasing a dog with bones, and he was very interested.

"Compared with your family's "Ruyi Jin", this book not only includes the method of breaking through the innate Liuhe realm, but also its true yuan is majestic and dexterous, and it is also comprehensively superior."

"Moreover, the complete "Interpretation of the Ox Dictionary" includes the five levels of Yuan Magnetism, and there is a chance to break through to the realm of heaven and man......"

Xiao Shisan didn't have the patience to listen to his brother's teasing, so he grabbed the martial arts and pushed it over the table casually.

Li Heming silently took it with both hands, his face was as usual, but his fingers in his sleeves couldn't stop trembling.

(End of chapter)