If you use wood for the sole, it is not wear-resistant at all. The solution is to nail iron into the sole of the shoe like a horse's shoe. This slows down the wear and tear of the sole, but the effect of caching is not noticeable when it lands. Even wounded soldiers' feet. and could not continue to fight.

With that in mind. Shang Wen fell into deep thought. Judging from all the materials I know so far, it seems that none of them can do a little bit. Shang Wen really has no way to solve the problem of material defects. I had to write some notes on the design drawings. That's it.

The paratroopers' umbrellas are mainly composed of a parachute coat, a guide parachute, a parachute line, a harness system, parachute opening parts, and an umbrella bag. Moreover, at the end, Shangwen also marked in a conspicuous position that the parachute must be 100% guaranteed to be able to open. This. It's because Shang Wen really doesn't want to see the same thing happen again. Two people died for no reason, and when Shang Wen thought about it, he felt a little worried.

Shang Wen sighed and sat on the ground. Calm your mind. This can be avoided. He is simply a murderer. Shangwen took a sip of water. Breathe deeply. Putting himself into work again, only by eliminating these hidden dangers did Shang Wen feel a little better.

Shang Wen marked the use of silk on the umbrella. Mainly for the sake of safety. Although some of the material is consuming. But the safety of the soldiers comes first. This point will become an important point for Shangwen to consider in the future. Human life is as big as the sky.

After designing the parachute. Shangwen began to plan how to improve the safety performance of the aircraft. The biggest hidden danger of the airship is the fire. Historic zeppelins, almost accompanied by fire. However, hot air airships use hot air balloon-like heated air. Instead of adopting hydrogen. This ensures that there will be no fire. But it's better to prevent it than to prevent it. Shang Wen decided to be on the airship, equipped with sandbags. water and other fire extinguishing materials. As for fire extinguishers. Some chemicals are also needed. Speaking of chemistry. Shang Wen felt that in the next few days, sulfuric acid and other substances must be made. These are all necessary for explosives. Now it is imperative to make up for all the mistakes.

Ying'er walked into the house again with her food, and it was already dawn by this time. Ying'er didn't move a bite when she saw the food on the desk. Mr. Qin flipped through the drawings with straight eyes, marking something on the drawings from time to time. There are drawings all over the bed. Ying'er looked at it and wanted to persuade Mr. Qin to take a break. But he couldn't bear to disturb Mr. Qin's train of thought. Just run out crying.

Shang Wen didn't have any idea of this at all. He needs to fix something. Only in this way can the self-blame in one's heart be better. The safety performance of airships must be improved.

Shang Wen couldn't think of any good way to do it. I can only list some ground handling systems and things that need to be checked. Since there is no radio. The establishment of the tower Shangwen felt that it was dispensable, but it was better to build it early. After all, it can control the take-off and landing of the airship globally. Lay a foundation for the emergence of aircraft in the future.

Speaking of airplanes. Shang Wen suddenly thought of something. Dig out the drawings after the flying eagle. Shang Wen took a closer look. Suddenly, it felt that the pod under the airship, with the flat wings, already had a model of a modern aircraft. But there seems to be something wrong with the dynamics. This will have to be solved after the new engine appears. But the shape. Just change it. It's what a piston plane looks like.

"Gliders." Shang Wen muttered. Shang Wen finally came up with a good idea. That is, before the airship airbag loses its buoyancy. The airbag can be unfastened. As long as the pod is involved in the shape of a glider, in that case, the glider can be landed safely. In this way, the safety performance will be greatly improved. Soldiers can escape without parachuting. After all, the safety of skydiving cannot be guaranteed, especially when it comes to height. In the future, the height of the airship must be high.

Sooner or later, the Great Qin Heavenly Army will go out to fight, adding another fire to the war of the Six Kingdoms. It is necessary to constantly become a lift-off operation. The cost of using the army is much greater than the cost of the sky army. So. The effect of the strategic bombing of the Celestial Army is prominent. It is impossible for the six countries to have no reaction after another blow. A large number of anti-aircraft weapons will definitely be developed. In fact, it is also true, as long as the muzzle of the cannon is turned up. An airship that can fly more than two hundred steps will definitely be able to be hit, as long as there are enough cannons on the ground. In addition, in the future, it is necessary to develop grenades, grenades and scattered bombs. If a shot hits, the protection of the airship is very low. All the airship can do is fly higher. Skydive at a high altitude. Shang Wen really didn't dare to imagine how much the umbrella could withstand. The only thing that can be done is to rely on gliders.

Come to think of it. Shangwen began to sketch the glider, the structure of the drawings was simple, and then the airbags of the airship. As long as the two are combined, you can do it. But. Power plant. heating device, where it is installed. If mounted on a glider. It's obviously a move to find death. Gliders are weight-conscious. Remembering the day of the Normandy landings in World War II. It is because of the "good-willed" actions of some people. Thick steel plates were welded, and the glider was too heavy, lost its balance, and fell headlong on the ground. There are too many such examples.

If a steam engine was used. There is also a heating unit. These things add up to a lot of weight. If mounted on a glider. Once out of the air bag. Gliders can lose their balance just as well. Plunge headlong. To do so is undoubtedly tantamount to suicide. Shang Wen somewhat rejected his opinion.

It can only be separated. The heating device, the steam engine can only be separated from the beginning. Shang Wen put a big circle on the airbag and the glider. Some notes are indicated. These fragmented structures have to be thought through.

Tu Fei woke up early in the morning. As a result of the injury, it can be cared for by some people. After Ying'er brought breakfast to Shangwen, she brought breakfast to this sick number. Breakfast was quite hearty. There is lamb stew.

"It's hearty." When Tu Fei saw the food brought by Ying'er, he couldn't wait to eat it hard.

Ying'er set up a table. Just put the meal away. Tu Fei grabbed the leg of mutton with one hand. Picked up a loaf of bread and ate it.

"Really, it's delicious." Tu Fei, who was chewing the food, said vaguely while eating.

Didn't eat a few bites. Tu Fei threw away the food in his hand and held his head in pain with both hands.

"It hurts. Hurt. "Spit out the food in your mouth. Tu Fei shouted.

Ying'er, who was suddenly frightened by this scene, was at a loss for what to do. What's going on.