Daqin: Qin Shihuang Visited The Stalls At the Start

"day and a half!?"

This time, everyone's An could not bear the shock in their hearts.

They believe that they have known Su Yu for more than three years, and they have become somewhat immune to most of the things that are extremely surprising to outsiders.

But now, after hearing such appalling data, he still couldn't help feeling excited and curious.

As for the authenticity of the data Su Yu said, they have no doubts at all.

Because every time Su Yu spoke, the seemingly impossible thing finally became a reality.

It was even more exaggerated than what Su Yu said.

Lao Zhao on the side rubbed his hands together, and asked impatiently, "Su Yu, tell me, what the heck is this thing that can have such a fast speed of 860? 35

Su Yu smiled, pointed to the sky and said, "It's a means of transportation that flies in the sky, called an airship. 99

Airship?

Flying in the sky?

Hearing Su Yu's words, everyone couldn't help looking at each other, and for a while they couldn't turn their heads.

Only Lao Zhao continued to ask: "Can you fly in the sky? Is it something similar to your helicopter?"

No, no, this airship and helicopter are fundamentally different. Su Yu shook his fingers and started to teach everyone about science.

"I said before, the air we breathe contains many different components, right?"

Lao Zhao and the others nodded again and again.

This issue was mentioned before when Su Yu popularized chemical knowledge for them (bhfa).

"Then who remembers what gases are lighter than air?"

Almost as soon as Su Yu's voice fell, Lao Zhao picked up the words: "Hydrogen, nitrogen, carbon monoxide, nitrogen, neon, methane, acetylene, ethylene.

Zhang Liang, who was about to raise his hand to speak, put his hand down angrily.

On the other hand, Lao Zhao had a bright expression on his face.

These were just things that Su Yu had pointed directly into his mind at the beginning.

The answer to this question, he can blurt out without thinking.

Su Yu nodded: "The so-called airboat is to place a large number of airbags in the hull of the boat, and fill these lighter-than-air gases."

"The more gas rushes in, the more buoyant the airship will be."

"Finally, put a high-power steam engine on it, drive the propeller to push the airship forward, and that's it."

Snapped!

Lao Zhao slapped his hand suddenly.

"I see, this should be floating on the water with things, right? 35

Su Yu nodded with a smile.

It seemed that choosing to instill Lao Zhao at the beginning was definitely a correct decision.

At least it's like this kind of big thing now, he is the one who makes the final decision, and he can reflect the principle at once.

"But... so many kinds of gases, which one do we use? How can we extract it from the air and store it in the airship?" Lao Zhao asked.

He is familiar with junior high school physics and chemistry knowledge.

The airship in Su Yu's mouth sounds extremely simple.

But the most difficult thing should be the extraction and storage of this gas.

Seeing Lao Zhao asked, Su Yu thought about it carefully and replied: "From a comprehensive consideration of all aspects, the most suitable gas for airships is helium."

"But due to the scarcity of raw materials and the difficulty of production, the current Daqin cannot be manufactured at all."

"So only the more dangerous hydrogen can be selected."

"As for the air bag for storing gas, it can be made directly from rubber.

"Hydrogen..." Old Zhao rubbed his chin and fell into deep thought.

Hydrogen is a very dangerous gas.

Whenever a spark is encountered, it will be completely ignited and even exploded.

I don't know how safe it is to use it as the main gas of this airship.

ps: The power airships in the early 20th century could fly at a speed of up to 190km/h, which means they could travel more than 4,500 kilometers a day.

Two thousand years ago, the kingdom of Bactria was located in the geographical location of what is now Wz Buick and Tu Cuman.

According to the normal navigable route, the air navigation distance is about 4,000 kilometers in modern units.

It takes one and a half to two days to arrive.