Coquettish Rebirth

Jia Hongjian is very familiar with the things made by that college student in later generations. The reason is that Yu Jie, who works in a venture capital company he knows, invested a sum of money in this student.Speaking of which, this student is from Hangzhou, and later went to Hong Kong to study at a university.In 05, this student and two classmates researched unmanned flight technology, of course, it was used in things like model airplanes. After half a year, there was a breakthrough, allowing model airplanes or drones to take off. And follow some simple designed GPS positioning "waypoints" to fly automatically.

Later, when the college student returned to the mainland, he and his friends raised money everywhere to find venture capital, etc., and finally spent 200 million yuan to start a company called "DJI". This time was 07, and it was 12 years , They finally launched the "" miniature unmanned integrated aircraft and sold it all over the world!The plane is automatically equipped with a small camera, which can shoot directly in the air, and then wirelessly transmit it to a nearby mobile phone. The price of such a plane is several thousand yuan.

However, the high-achieving students have been studying from beginning to end for six or seven years. Jia Hongjian now asks Ni Guangnan to study. Of course, it does not mean that Ni Guangnan is not as good as a college student, but that Da Neng can break through the time limit. Was it successfully developed in a month?Of course!Why is Jia Hongjian so confident?The reason is very simple. After he heard from Sister Yu that this "" was put into production and sold well, he also wanted to ask Sister Yu to play a game, but Sister Yu also told him that the most powerful thing in DJI is the flying machine. Control, that is, flight control.If you don’t play with avionics planning and let the aircraft fly autonomously without GPS coordinates, then it doesn’t make much sense to buy DJI products. After all, their biggest highlight is automatic flight.

At the same time, this thing is quite expensive - the plane is only a few thousand dollars, but the battery dedicated to the plane, which is 5200 mAh, has the same capacity as a tablet computer battery, and dare to sell for more than 900 yuan!Can you believe it?This price is more expensive than some domestic small brand tablet computers!Even some of ASUS’s soon-to-be-discontinued products may not be as expensive as such a tablet—Jia Hongjian bought an ASUS tablet for his mother back then, and the 7-inch one was only 750 yuan!He wanted to buy apples for his mother.Mom thinks it's too expensive, don't want it!

And that sister Yu even told Jia Hongjian.DJI's products are so expensive, "it's purely to make a lot of money", because the actual market price of such a battery is about 160-300 yuan.Even better ones come with a balance protection board.It's only a few dozen dollars more!So how much profit is there?

For example, Jia Hongjian later bought a new product from DJI, the Nezha-m-lite multi-rotor drone.There are no waypoint settings and GPS navigation, and the whole plane is only 400 yuan!Then fix a small dv on it by yourself, and you can play!And what if you buy the Wukong-m model that supports waypoints?The drone itself costs 6000 yuan.If it is equipped with all the matching cameras and something messy, it will cost 2 at once!And it's not over yet!The ground control station, that is, a control device costs about 2 yuan!

So, if Mr. Ni Guangnan was allowed to develop such a thing, or even asked him to help find some great talents in the engineering academy to help develop it, wouldn't it be much faster?Moreover, Jia Hongjian and his team don’t really need the multi-rotor UAV to automatically fly according to the GPS waypoints, even if it is controlled by a person on the ground with a joystick, right?Besides, in 2012, apart from DJI, there are many merchants on Taobao that make four-axis rotor drones!Even the Syrian opposition has drones bought from Taobao for reconnaissance!How can the old man and the others make better products than Taobao merchants?

Of course, the research on such a drone is for commercial shooting—after all, it is for commercial blockbusters, so the overall requirements may not be low.Historically, some film crews in China have started to use DJI’s machines. The most important reason is that compared to helicopter aerial photography, this kind of drone with an investment of tens of thousands of yuan can be used multiple times, and the control Simple, easy to carry, and generally speaking, it is relatively cost-effective.

However, after Jia Hongjian made the request, Mr. Ni called back to report to Jia Hongjian the next day: "Hungjian, the model airplane you mentioned yesterday... oh, the drone , I did some calculations, and this thing is quite a project. Look, I asked the videographers in our TV station, and they said that the professional movie cameras you use are Panavision brands used in Hollywood? And only for rent or not for sale? We only have Arri’s in China. I inquired about it. They said that Ari’s 535b, a radio-type 35mm camera, was equipped with a standard viewfinder and not loaded with 400-foot film. In this case, the weight has already reached 15 kg? This has not yet loaded the film, if it is Panavision, I guess the film is installed, we have to make a reserve weight of 20 kg, right? The weight is too much It’s easy to handle, but if you leave too little, you can’t fly. So the weight of the camera and film alone needs to be 30 kilograms. Next, if your camera takes aerial shots, you need a stabilizer? Otherwise, it will fly. It’s not okay to take pictures with your lens that are all bumpy. If the stabilization device is not done well, it will be more complicated and heavy.

However, we can use other materials for this stabilizing device, such as engineering plastics, and the weight can be reduced a lot. Let’s just count it as 5 kg.In this way, the aircraft must carry at least 35 kilograms of things, and after that, it can carry 35 kilograms of flying models... Drones, whether they rely on batteries or internal combustion engines, the batteries and fuel Always want a lot?Let’s not calculate the weight of the battery, but calculate the weight of the fuel first. If it is filled with one liter of gasoline, then we will calculate the weight according to the weight of water, which is one kilogram. Then there is a total payload weight of 36 kilograms. in, right?Then, in order to carry 36 kg, I think engineering plastics may not be able to do the body structure. It also needs a landing gear similar to that of a helicopter. It is best to use aluminum alloy, so that the weight is not heavy and it is safe. After all, your camera Expensive, I heard that the 535b of Alai's camera costs more than 250 million?Is this still without a viewfinder?Such an expensive camera cannot be dropped.

Therefore, the body must be made solid, even if it falls from a height of 3040 meters, it can ensure that the camera will not break.Therefore, even if the airframe weighs 10 kilograms, the total weight is 56 kilograms, which does not count the weight of the engine. If I count it, I guess the whole weight will be [-], [-] or even [-] kilograms?And if this kind of weight is relied on the small four-axis propeller, it may not be able to carry it..."

When Jia Hongjian heard this, he said without exaggeration that he was a little confused!Why are you dumbfounded?Because he suddenly remembered that your sister didn't have a fully digital camera in these days!That's right!With the fully digital camera, the weight of the camera has been greatly reduced. It seems that the weight of Sony's professional cameras in later generations is only ** kilograms!And now, this camera is actually priced in the millions, and it's so damn heavy!You must know that the maximum take-off weight of the DJI that Jia Hongjian played with is only 10 kilograms!The weight of these ten kilograms is simply and rudely distributed to four propellers, that is, one propeller is responsible for 2.5 kilograms of weight, right?If this is calculated according to the old man’s 75 to 2.5 kilograms, let’s say 75 kilograms, a propeller’s share of 30 kilograms, 30 kilograms is not considered the indulgence of the propeller itself, it also needs [-] propellers! [-] propellers, and drive shafts and so on, all this mess adds up to a lot of weight!

your sister!If the digital camera is good, just like DJI, if you get a high-quality camera on it, you can also shoot 1080p high-definition pictures... Well, that kind of picture can probably be used in variety shows, If it is used in a film, the photographer would probably not be willing to die, and the difference between the effect and the 35mm film would be too great... So no matter from that point of view, Jia Hongjian and the others are now going to make a multi-rotor unmanned If it is a camera, it is estimated that there is no way to make it as small as the later DJI, and because this is a top-level commercial film, the picture effect must be shot with a top-level camera, so the weight can be reduced no matter what. not go down!

Seventy to eighty kilograms, and the upper limit may even be as high as one hundred kilograms. This is two hundred kilograms!How big would this be if it were to be made into a drone?You must know that this drone is made, and the camera is put down. In theory, it is possible to take a child of about 70 catties to the sky!Even with Ye Jing, who is in his early 90 catties, he might be able to get off the ground!What is this concept?How big is your sister going to be?It is estimated that this drone will be about four square meters in size?How big is this propeller?It is estimated that the leaves are almost 1 meter long?Isn't this thing too huge?

Just when Jia Hongjian was a little confused, Mr. Ni Guangnan said: "Hongjian, this thing is a bit big, let us Huaxia Hi-Tech do it, it's not impossible, but we don't have a solid foundation in this area. If it was as big as an ordinary toy model airplane, I guess I can still tinker with it. But at this level...it's really not good...even if it can be made, it will take at least three to five years...or... ...Why don't you look for Ye Jing's relationship with their family...and people from the military to help with research?" (To be continued...)