Chapter 635

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In the field of aviation, there is a technical term called "bird strike", which means that a bird strikes a flying human aircraft.

It is a common sense that birds are a deadly threat to aerial vehicles. Birds are generally small in size and light in weight, and the main damage of "bird strike" is not from the birds themselves, but from the super high speed of the artificial aircraft itself.

For example, if an aircraft flies in the air at the speed of 128 meters per second, if the aircraft collides with a 500 gram bird, according to the kinetic energy theorem, it will generate about 4000 joules of energy, which is almost absorbed by the aircraft in an instant, and will be damaged to varying degrees in the parts contacting with the body, which often means the disaster of aircraft destruction and human death.

The speed of the floating high-speed railway has reached the "subsonic" level of more than 1200 kilometers, and the destructive power is unimaginable. It is common for birds to hit aircraft.

The orbit of the floating high-speed railway is set at a low altitude of several hundred meters, so the harm of bird impact has to be considered. Even in the ocean, there are a large number of seabirds.

The people who found the small details were really surprised, but they didn't show too much surprise. This kind of low-level question was obviously within the scope of the other party's consideration, just waiting for the answer.

However, people also have guessed, according to the information fragments now understood, they can also roughly guess.

No accident, it should be the vacuum pipe!

Ren Hong, on the stage, adjusted the hybrid reality projection, and said: "anti gravity technology is the core technology of the floating high-speed railway, and other corresponding supporting technologies are also the key. The birth of a new transportation system requires a long and multi-disciplinary technology accumulation."

"Et3, a technology company in the United States, has developed the" capsule train "plan for the principle of vacuum pipeline transportation. One of my partners, Mr. Elon Musk, has enriched this concept and proposed the concept of" super high-speed rail ", contributing more technical and design details."

"From another point of view, the floating high-speed rail is actually a luxury upgraded version of the" super high-speed rail ". Many key technologies applied to the super high-speed rail will be applied to the floating high-speed rail. However, the existing mature technologies will be further upgraded when applied to the floating high-speed rail, which will meet the actual requirements."

"Compared with the single pipeline vacuum transportation pipeline currently operating in Dubai, the floating high-speed railway adopts composite honeycomb vacuum transportation pipeline."

The hybrid reality image then projected a honeycomb shaped cross-section of the pipeline, showing an equal hexagon. This composite transportation pipeline consists of a total of seven transportation ports, which are of the same size. The distance between them is more than 10 meters and fixed with truss.

This is not difficult to understand, if the close is too dense, in case one of the pipelines fails and affects the original intact other pipelines, it will be a great loss.

Good guy!

People present are surprised to see this data, especially the representatives from various countries. This complex transportation pipeline has seven full-scale transport ports. In other words, it can make seven floating trains operate at the same time. A 50000 ton carrying capacity is multiplied by seven, which is a full 300000 tons transportation capacity, and a large ocean shipping post It's just like that.

And this guy can be faster than air transport.

Many people have doubts in their hearts. The honeycomb composite vacuum transportation pipeline sounds a bit tall, but that's what it is. It's just adding a few more transportation pipelines. This cost problem is bound to be outrageous?

Ren Hong seemed to see the doubts in people's hearts: "it is worth noting that the floating high-speed rail and the super high-speed rail look similar, but they are totally different concepts. The core technology of super high-speed rail is still electromagnetic levitation technology, while the core technology of floating high-speed rail is anti gravity

"Suspension is also the core concept, which is to reduce contact friction and air friction and set up a special peer environment. The differences are mainly reflected in two points: first, if converted into electric energy for comparison, the transportation capacity of the floating high-speed railway per kilowatt hour is 150 times that of the super high-speed railway; second, the dependence of the floating high-speed railway on hardware is much smaller than that of the high-speed rail. We build a honeycomb vacuum transportation pipeline with seven transportation ports, just for a vacuum environment, that's all, so it is practical The investment cost is just as much as building a vacuum transportation pipeline for capsules. "

Ren Hong said that there was a low voice of discussion below the field. Obviously, he was a little unconvinced. He laughed and explained: "the floating train is based on anti gravity technology, and it is not the use of electromagnetic suspension system to maintain the suspension state. Therefore, we only need to consider one point for our honeycomb composite vacuum pipe, that is, to maintain a vacuum environment, and to be safe and reliable."

"This means a large-scale cost reduction. Elon Musk's technical team has been able to reduce the limit pressure of the vacuum pipe to less than 1000 PA, and one atmospheric pressure is equal to 101325 PA, which is equivalent to pumping more than 99% of the air in the honeycomb duct enclosure."

"Anti gravity is also a big energy consumer, so how can the anti gravity device on the floating train get power?" Ren Hong asked himself, "nuclear power, I have a rough data here. A nuclear fuel injection of floating train can maintain the basic operation for 15 years. On the premise of irresistible factors, it can meet the demand for 15 years, and the nuclear fuel supply will be conducted after 15 years."There is no doubt that nuclear energy is the most efficient clean energy in the world today. It is simply equipped for these energy consuming large users. For example, large power equipment, such as aircraft carriers, are all nuclear power driven.

"So the problem is, floating train does not have electromagnetic suspension system, so what power drives tens of thousands of tons of nuclear power floating train forward?" Ren Hong once again threw questions to the audience.

"Of course, we can use anti gravity drive, which is theoretically feasible." Ren Hong said so, but quickly added: "the cost is too high. How high is it? Driving the train with anti gravity means that we have to refuel every 18 months on average. Note that even nuclear power is not desirable. "

"The biggest purpose of the anti gravity device is to suspend the car. It's hard to afford to use this technology as the core drive, unless the ticket price is set at $800, but I think customers will be happy to say no

A burst of laughter resounded.

"Kinetic energy!" Ren Hongyan, who was astringent and smiling, simply said the word, and then added: "the floating train and capsule train are both running in a mirror image environment, both in a vacuum pipe, and mainly driven by inertial kinetic energy. However, there is a difference in how to provide the kinetic energy source for the train. The capsule train uses a linear motor to accelerate the cabin, and finally moves forward by magnetic levitation in a vacuum pipe relying on inertia. "

"The initial kinetic energy source of the floating train is the electromagnetic catapult." Ren Hong replied. The United States is undoubtedly the leader in this field of electromagnetic ejection technology, and China has the ability to compete with the Americans in this field since it started.

With this technology, Chinese and Americans are at the forefront of the world.

Ren Hong said with a smile: "when it comes to electromagnetic ejection technology, I think the participants here may have thought of the electromagnetic catapult used for carrier aircraft take-off on aircraft carrier at the first time. Electromagnetic ejection technology can be said to be the key technology of aircraft carrier."

"Our company's CMSX space base has an arc-shaped space orbit launch tower, and now we need to build several more, using electromagnetic ejection technology. There is no doubt that China and the United States are the countries with the most mature technology in the field of electromagnetic ejection. "

"But the electromagnetic ejection technology here is not to drive a carrier based aircraft or an aerospace transport aircraft of more than ten tons or dozens of tons. The equipment to be driven is a huge volume of tens of thousands of tons!"

Ren Hong said with a smile: "if the electromagnetic catapult or steam catapult on an aircraft carrier is used to drive an aircraft, what I want to say now is that it can directly drive a big guy whose size is comparable to that of a medium-sized aircraft carrier and make its speed reach subsonic speed."

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