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There is a professional term in the aviation field called "bird strike", which means that birds hit human aircraft flying in the air.

Birds are a fatal threat to air vehicles and are common knowledge that everyone knows. Birds are generally small in size and light in mass. The main damage of "bird strike" does not come from the bird itself, but from the super high speed of the artificial aircraft itself.

For example, if an aircraft flies in the air at a 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 4,000 joules of energy. This energy is absorbed by the aircraft almost instantly and will be destroyed to varying degrees in the parts in contact with the body, which often means a disaster of plane destruction and death.

The speed of the floating high-speed rail has reached an astonishing "subsonic" level of more than 1,200 kilometers, and its destructive power is even more unimaginable. It is common for birds to hit aircraft.

The tracks of the floating high-speed rail are set at a low altitude of hundreds of meters, so the harm of bird impacts has to be considered. You should know that even in the ocean, there are a large number of seabirds.

The person who found the small details was indeed surprised, but he did not show a look of too surprised. This kind of low-level question is obviously within the scope of the other party's consideration, and you just need to wait for the answer to be revealed.

However, everyone has also guessed it, and based on the information fragments we know now, you can roughly guess it.

If nothing unexpected happens, it should be a vacuum pipe!

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

"The American technology company et3 has formulated a ‘capsule train’ plan for the principle of vacuum pipeline transportation, and one of my partners, Mr. Elon Musk, has enriched this concept and proposed the concept of ‘super high-speed rail’, which has contributed more technical and design details."

"Floating high-speed rail from another perspective is actually a luxurious upgraded version of the 'super high-speed rail'. Many key technologies applied to super high-speed rail will be applied to floating high-speed rail, but existing mature technologies will still be further upgraded when applied to floating high-speed rail, which meets the actual requirements."

"Compared with single-pipe vacuum transport pipelines currently operating in Dubai, floating high-speed rail uses composite honeycomb vacuum transport pipelines."

Mixed reality images then projected a honeycomb-shaped pipe cross-section, showing an equal hexagonal shape. This composite transportation pipeline consists of seven transport ports in total, with a total size. It is spaced more than 10 meters away from each other and is fixed with trusses.

This is not difficult to understand. If the tight fit is too dense, it will be a big loss if one of the pipes fails and other pipes that are originally intact.

Good guy!

Those present were surprised to see this data, especially the representatives sent by various countries. This composite transportation pipeline actually has seven conglomerate transportation ports. In other words, it can allow seven floating trains to operate simultaneously. One train has a capacity of 50,000 tons, multiplied by a seven, which means a transport capacity of 300,000 tons. This is the case for a large ocean-going cruise ship.

And this guy's speed can be faster than air transportation.

Many people also have doubts. The honeycomb composite vacuum transportation pipeline sounds a bit high-end, but that's it. It's just that a few more transportation pipelines are added. This cost issue will definitely be outrageous, right?

Ren Hong seemed to see the doubts in everyone's hearts: "It is worth noting that floating high-speed rail and super high-speed rail look similar, but they are completely 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."

"The same concept is based on suspension as the core, and it is set up a special peer environment to reduce contact friction and air friction. The differences are mainly reflected in two points: First, if converted into electricity for comparison, the transportation capacity of each kilowatt-hour of electricity of the floating high-speed rail is 150 times that of the super high-speed rail; Second, the dependence of floating high-speed rail on hardware is much smaller than that of the high-speed rail. We build a honeycomb vacuum transportation pipeline with seven transport ports, just for a vacuum environment, that's all, so the actual investment cost is exactly the same as building a capsule vacuum transportation pipeline."

Ren Hong said here, there was another low voice of discussion off the field, obviously not convinced, and smiled and explained: "The floating train is centered on anti-gravity technology. It is not the electromagnetic levitation system that maintains the suspension state. Therefore, our honeycomb composite vacuum pipeline only needs to consider one thing: that is, maintain the vacuum environment and 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 1,000 pa, and one atmosphere is equal to 101,325 pa, which is equivalent to removing more than 99% of the air in the sealed compartment of the honeycomb pipe."

"Anti-gravity is also a large energy-consuming user. So how should the anti-gravity device on a floating train obtain power?" Ren Hong asked and answered: "Nuclear power, I have a rough data here. A single nuclear fuel injection for floating trains can maintain basic operation for 15 years. Under the premise of irresistible factors, it can ensure that 15 years of demand can be met and nuclear fuel will be replenished after 15 years."

Nuclear energy is undoubtedly the most efficient clean energy in the world today. It is simply configured for these large-scale energy consumers, such as large power equipment, aircraft carriers, etc., which are all nuclear powered.

"Then the question is, floating trains do not have electromagnetic levitation systems. So what power drives the tens of thousands of tons of nuclear-powered floating trains forward?" Ren Hong once again raised the question to the audience.

"Of course, we can use anti-gravity drive, which is theoretically feasible," Ren Hong said, but quickly added: "The cost is too high, how high? Using anti-gravity drives trains will mean that we have to recharge nuclear fuel on average every 18 months. Note that even if it is nuclear power, this is obviously undesirable."

"The biggest purpose of the anti-gravity device is to let the car levitate. It's really hard to use this technology as the core driver, 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 smiling convergingly, said this word concisely, and then added: "Floating trains and capsule trains are both driving in a mirror environment, both in vacuum pipelines, and mainly rely on inertial kinetic energy to drive forward. However, there is a difference between how to provide a source of kinetic energy for trains. The capsule train uses a linear motor to accelerate the carrying cabin, and finally magnitude is magnitude-relying in the vacuum pipeline by relying on inertia."

"The initial kinetic energy source of floating trains is electromagnetic catapults." Ren Hong replied. The United States is undoubtedly the leader in this field of electromagnetic catapult technology. China has the ability to compete with Americans in this field after the start of electromagnetic catapult field.

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

Ren Hongxiao said: "When it comes to electromagnetic catapult technology, I think the participants present may have thought of the electromagnetic catapults used for carrier-based aircraft takeoffs on aircraft carriers at the first time. Electromagnetic catapult technology can be said to be the key technology of aircraft carriers."

"The company's MS space base has an arc-shaped aerospace orbit launch tower. Now there are several more to be built, which also uses electromagnetic catapult technology. There is no doubt that China and the United States are the countries with the most mature technology in the field of electromagnetic catapult."

"But the electromagnetic catapult technology we want to talk about here is not to drive a carrier-based aircraft or aerospace transport aircraft worth more than tens of tons or dozens of tons. The equipment to be driven is a super large 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 driving an aircraft, then what I want to say now is to directly drive a big guy with a size comparable to a medium-sized aircraft carrier and make its speed reach subsonic speed."

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Chapter completed!