Chen Hao laughed, puffed up his tongue, and vividly told the three beauties about the excitement and fun of skydiving, and quickly aroused the three women's skydiving excitement.

Seeing the three of them dancing, Chen Haoyu said to Qin Luolan earnestly: "Lan Mei, parachuting and other sports also require a certain degree of physical fitness. And it also requires necessary training to be carried out safely. Li Mei and Yu Mei have always followed me to exercise. From tomorrow on, you should also get up early and exercise with us so that the four of us can fly together in the blue sky in the future."

After listening to Chen Hao's ambiguous words, Qin Luolan's face turned redder. Seeing Xia Lili and Zheng Xuanyu both looked at her with kindness and encouragement, she quickly lowered her head and said, "Okay, Brother Chen, my sister will definitely get up early in the future and exercise with you. I hope you can give me more guidance and urge me."

"Sure, certain! Hahaha!" Chen Hao's plan to pick up girls was successful step by step, making him laugh happily.

Zheng Xuanyu was afraid that Qin Luolan was shy and embarrassed, so she quickly changed the topic and said: "Brother Hao, you have told us about the appearance and function of airplanes before, but never mentioned airships. Since both airplanes and airships can fly people into the blue sky, then, can you tell me what is an airship and what is the difference between airships and airships?"

"No problem!" Chen Hao stopped laughing and replied happily: "Mei Yu, airships are a good thing. During this period, the function of airships is much greater than that of airplanes!"

Then, Chen Hao told the three beauties about the airship that he knew.

Airship is an aircraft that is lighter than air. The biggest difference between it and a balloon is that it has devices that advance and control the flight status.

The airship consists of a huge streamlined hull, a pod located below the hull, a tail surface that plays a stable control role and a propulsion device.

The airbag of the airship is filled with floating gas hydrogen or helium with a smaller density than air to generate buoyancy to lift the airship off. The pod is for personnel to ride and load cargo, and the tail surface is used to control and maintain the heading and pitch stability.

The airship flies smoothly, has good handling and is easy to drive.

Its outstanding advantages are that it can take off and land vertically, has low requirements for the take-off and landing site, has a long time to stay up, can hover or travel slowly for a long time, and does not consume fuel, has low noise, low pollution, and good economy.

The airship has a long battery life, a long range, and a large effective load capacity. In addition, the airship's maintenance fee, site construction fee, flight fee and training fee are relatively low, and the operating cost is much lower than that of the aircraft.

In peacetime, airships can be used in aerial surveying, photography, advertising and life-saving operations, and it is very important to pioneer the adventurous spirit of the Chinese.

During the war, airships, as one of the new technologies, can be widely used for military purposes. They are mainly used in military reconnaissance, artillery fire positioning, coastal patrols and transportation of military supplies.

Inevitably, airships also have many disadvantages compared to aircraft.

First of all, the airship is too large and its huge body determines that when you go to the front line, you will become a huge target.

During wartime, before the enemy has prevented airships from taking precautions, airships have a huge surprise attack. Once the enemy has defensive measures against the airships, the airship can only play a supporting role in the rear.

Moreover, building an airport can accommodate hundreds or even thousands of aircraft. However, the same space can only accommodate more than a dozen airships. Therefore, the airship garage is also a relatively troublesome issue.

Secondly, compared with agile aircraft, the flight speed is too slow.

Of course, the flight speed of the airship is slow, but it is only relative to the airplane. Since the airship is in a straight line in the air, its flight speed is still very fast compared to the ground train or carriage.

The transportation efficiency of an airship at a speed of 100 kilometers per hour is equivalent to the transportation efficiency of a train at a speed of 300 kilometers per hour. It is not difficult for an airship to exceed 200 kilometers per hour, which is equivalent to the transportation efficiency of a train at a speed of 600 kilometers per hour.

Third, hydrogen is dangerous and explosive.

Therefore, we must use the natural gas resources and scientific and technological talents from the United States to vigorously develop the inert gas helium in the United States. In the future, helium is used to fill the airbags of the airship hull to improve the safety of the airship.

Of course, Chen Hao also knew that hydrogen is flammable, which is only relative. In fact, during World War I, the German airship was hit by British anti-aircraft guns and there were gun holes everywhere, but it was only after it was replaced with incendiary bombs.

Fourth, building an airship costs millions of dollars at every turn. This is simply an astronomical figure and is the biggest disadvantage of an airship.

Although the cost of using airships is very low, its cost is too high. The price of airships generally varies according to their size. For example, a small soft airship that is 40 meters long costs about US$2 million.

Xia Lili, Qin Luolan and Zheng Xuanyu were afraid that the other two would miss Chen Hao's words, so the three of them habitually took pens and recorded quickly.

Hearing that the airship was so expensive, the three of them were shocked. Zheng Xuanyu questioned: "Brother Hao, the cost of building an airship is almost hundreds of times that of an airship, and the airplane is obviously much more advantageous than an airship. So we just need to develop the airship alone. Why do we have to spend a huge amount of money to build the airship?"

"Mei Yu, those imperialist countries have not yet realized the true value of airships and will not take any air defense measures. As long as we take confidential measures and use the advantages of airships reasonably in the future, we can unexpectedly achieve our strategic goals and make our People's Liberation Army amaze." Chen Hao replied.

"But Brother Hao, the cost of airships is really too high. No matter how much money we have, we can't withstand such consumption!" Xia Lili sighed in a sweet voice.

"Haha! Don't worry about money." Chen Hao laughed and teased, saying relaxedly: "Some sisters, our PLA has countless cheap labor and free resources, which can greatly reduce the manufacturing costs of airships. Coupled with reasonable planning and scientific flow operations to mass-produce airships, it will inevitably greatly reduce the manufacturing costs of airships."

"Brother Hao, what is flowing water homework?" Zheng Xuanyu asked curiously.

"Spreading operation is a way of production organization. It divides the entire processing process into several different processes and continues to be carried out in sequence like flowing water."

Seeing that the three beauties were all puzzled, Chen Hao continued: "Steam operation is the most advanced production method. Based on construction professionalism, the same construction process for different engineering objects will be handed over to a professional construction team for execution.

Then, under the unified plan, each professional team completes the designated operations on each operation surface in turn. In the future, this production method will be implemented in our factory. At that time, you will naturally understand the mystery.”
Chapter completed!