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body 293 I want to fly too!

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    Regardless of whether the navigator can give accurate figures, the long-distance flight at that time and the global voyage in the age of great voyages were basically the same concept. As long as the ship sailed into the ocean, whether it would be able to land half depended on technology and half depended on luck.

    If it is a fighter or bomber, it is understandable to take such a risk, but with the demand for passenger flight, if the aircraft cannot be guaranteed to reach its destination safely, then it does not matter how fast it flies.

    So soon there were two mutually assisted navigation methods, inertial navigation and radio navigation.

    Inertial navigation is a very sophisticated device, relying on gyroscopes and accelerometers to calculate the distance and direction traveled.  Its advantage is that it does not require external signals such as GPS and radio, and does not send any signals to the outside, and operates entirely by itself.

    In theory, as long as the aircraft has an inertial navigation system, it can be relied on to guide the direction, calculate the flight distance, and finally reach the destination.

    But Inertial navigation, like all mechanical systems, has errors, and they are constantly accumulating.  When flying a short distance, the direction and distance are not affected much, but as the distance increases, the error will become larger and larger. In the end, as our ancients said, the difference is a thousand miles away.

    At this time, radio navigation can enter the stage. Generally speaking, radio navigation is to set up n radio signal sending stations along the way, and use specific and unique frequencies to transmit medium-wave and long-wave pulse signals, and later switch to more stable VHF.  Pulse signal.

    There is a special receiver and calculation system on the plane. After receiving the pulse signals from three adjacent navigation stations, the relative distance and orientation can be determined by calculating the signal time difference, which is often called triangulation.

    Before the advent of the GPS system, there were several commercial aviation navigation systems around the world, the common ones being "Omega", "Roland" and the VHF omnidirectional beacon mentioned above.

    The first two are developed by the U.S. military, which can cover more than 95% of the world, and later turned into civilian use. There is no charge except for hardware equipment.  The last type has been established in various countries, but the coverage rate is not high.

    With the popularization of GPS receivers, these ground-based radio navigation systems were decommissioned at the end of the 20th century and the beginning of the 21st century, and only some of them remained in some countries, but they could no longer achieve the effect of global navigation.

    After Hong Tao found these materials, he had an idea. Restoring the GPS satellite network at present is obviously a dream. That thing is a large system, and it requires very, very professional knowledge.

    But the "Omega" and "Roland C" systems are relatively simple. They are the sum of a bunch of ground transmitting stations. To put it bluntly, they have the same meaning as short-wave radio stations.  If these ground navigation stations can be restored, it is not necessary to provide air navigation services in some areas.

    Of course, if all the navigation platforms of any system can be restored to operation, in theory, global flights can also resume, as long as there are enough pilots.

    There are only 8 navigation stations in the "Omega" system in the world, which are located in North Dakota, Hawaii, Norway, Japan, Libya, French Reunion Islands, Argentina, and Australia.

    "Roland c" is slightly more, with 34 navigation stations, distributed in the United States, Canada, Russia, India, Northern Europe, Greece, Saudi Arabia, and China.

    At present, apart from the French Reunion Islands and Libya, the groups joining the Survivor Alliance are all over the countries where the navigation station belongs. It is not a luxury to find a way to restore the operation of some navigation stations.

    But Hong Tao didn't disclose this idea to the Alliance Committee for the time being. This is purely selfish.  Can an airplane fly long distances with only a navigation platform?  The answer is no, radio navigation requires not only a navigation station, but also corresponding receiving equipment, which is installed on the plane.

    These two sets of radio navigation systems have been abandoned for many years. Are there any aircraft equipped with this old-fashioned navigation equipment?  Generally speaking, the main models of major commercial airlines should not be available, but it is not ruled out that some old models or special aircraft, such as private jets and special planes, are also available.

    Why do you think so?  Because Hong Tao read a piece of news that Trump¡¯s Air Force One is an old Boeing 747. In addition to various advanced equipment, the cockpit still retains the radio navigator and navigator.

    It's definitely not that Lao Mei has no money to replace the presidential plane with new equipment. It is probably out of backup considerations.  In case the GPS signal is gone, Air Force One cannot find the base, then the old system will play a big role.

    Since Lao Mei can think this way, will special planes and private jets in other countries also have the same considerations?  Hong Tao thinks it is very possible, so in addition to the Capital Airport and Daxing Airport, Xishan Airport also has to look for it. If there are special planes, there must be a lot of them!

    "Too professional, hard to hear"?But I think it is not unreasonable for Jiao Qiao to say that you are a foreign spy. Are these things ordinary people should know?  "

    Zhou Yuan was stunned, but her eyes did not have the little girl's admiration for the unknown, but were full of doubts.  In order to prove that he was not blindly suspicious, he even brought Jiao San out.

    "You can just hang out. I've emphasized it with him. It's very promising!" Hong Tao admired Jiao San's ability to spread gossip. If he needs a publicity department in the future, he must be the first choice.

    "If this method is really feasible, how long will it take to restore the navigation station?" Fortunately, Jiao San is really not well-known in terms of intelligence, and Zhou Yuan doesn't want to be compared with him, so the spy matter is no longer mentioned.

    "First we need to see if the location information of the navigation station can be obtained, and we also need to see if there is a survivor team nearby. Complete recovery is unlikely, and a partial recovery should be done in a few months."

    Hong Tao has a better grasp of the issue of restoring the radio navigation station.  That thing sounds unfathomable, but it is actually a radio station, which can be done by just finding a ham and bringing a generator.

    Domestic ham is strictly controlled, but it is more popular abroad, so people should not be a problem.  The difficulty lies in the location. Some places may be far from the city, and it is difficult to find without accurate coordinates.

    "Then why are you so anxious to ask me to help find a plane? Xishan Airport is located outside the Fourth Ring Road and is not under the jurisdiction of the Pingnan Army. The rescue team is fully capable of going there!"

    Working with smart people has its conveniences and its troubles.  They have strong comprehension skills and are easy to communicate with, but they also have many problems.  For example, Zhou Yuan, don't try to instigate actions unless she fully understands in her heart, and the exchange of interests will not work.

    "I'm not an astronaut Well, to be honest, I need time for testing. Also, I want to go to Changsha, where there are urgently needed scientific researchers."

    Encountered such a problem of special details, Hong Tao instinctively wanted to make up a story.  But when Zhou Yuan frowned, she realized that making up nonsense was meaningless, so she just said it.  If you want others to cooperate, but you can't be fooled, attitude is very important.

    "Are you going alone?"

    "What do you mean?"

    "Can I go together? By the way, teach me how to fly a plane. If you really need to run away one day, you will definitely not take me with you. I can only support myself"

    "You don't trust me, don't you?" Learning to fly a plane If Hong Tao can believe this reason, he will go to hell.

    Even if you fly up, you don't know if you can land safely, so you still have time to teach her how to drive?  This woman definitely still doesn't fully believe it. She might think she knows about the crisis and wants to run away alone.

    "If you want me to feel at ease, take me with youit's not difficult." Sure enough, Zhou Yuan didn't even make an excuse, and directly acquiesced.

    "I'm driving a jet, so I can't skydive. If something goes wrong, there is only one way to die!" Although there is nothing wrong with taking Zhou Yuan with him, Hong Tao instinctively doesn't want others to know him too much, especially smart people.

    "Tch, are you still afraid of death at this point? Don't forget, I fought against zombies alone, and I didn't know I could survive at that time." Zhou Yuan answered very simply, with a faint smile on her face.  , as if talking about what movie to go tonight.

    "Find the plane first, otherwise everything will be empty talk." Threats don't work, and then I resort to delaying the attack. Anyway, she can't stare at herself every day, and she will fly whenever she wants.

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