At the end of May this year, untrained plant protection training was conducted in Beijing, thinking about starting an aircraft training squad, and interacting with children (12 years old). JD Dongdong promoted the promotion, and fortunately grabbed a 100 minus 100 white vouchers. On the full reduction campaign of 199 minus 50, he also used 1,000 Beijing beans, decisively starting with an Audi dual-drill X1 quadcopter and an anime doll (with a single).
Let's give everyone a look at my God price.
After receiving the goods, my heart was still very happy, and look forward to almost, very large, original unopened, more satisfactory.
The remote control seems to be Altman's cool styling. It is more appealing to the children and it is also comfortable to grasp. Frequency 2.4G, effectively avoiding crosstalk and interference.
The cover of the main unit is very pleasing to the remote controller. When you look at it, you have one and two indicators on the head. The motor's boom is made of aluminum alloy and is very hard (the picture is taken now, some wear).
The landing gear is stainless steel and looks very solid. Four shock-absorbing pads are installed at the bottom to effectively relieve the inertial impact on the aircraft when the aircraft lands.
Two paddles were also presented, with Chinese as a positive paste, and with English as an anti-slurry.
The whole installation is also relatively simple, and the blades are installed at the factory. First, insert the battery into the battery compartment, install the landing gear, and install the protection frame of the four blades. After the completion, the maximum arm length is 60cm, which is very high-handed. The remote controller was loaded with four AA batteries, and everything was ready. After the frequency was set, the next paddle motor was tested indoors. The operation was smooth and smooth, and it felt better than a professional model. And the child could not wait to get it in the park and began the first test flight.
Feeling pretty good, diligent rudder, can basically ensure that the aircraft can fly smoothly in a relatively small area. The reason that it may be just started is that the aircraft sometimes yaws under the action of wind and falls several times. It seems that this wind resistance Not outstanding, suitable for outdoor flight without wind and open air. Try to set a high and one-click flip, are very sensitive. At that time, it took about 7 minutes to fly with a protective frame, and the battery life was acceptable. After playing a few times, the protective frame was removed, so that it felt better to control the flight and the endurance could reach almost 10 minutes. Because charging is going to switch the battery compartment, it's too much trouble. I made some improvements.
1942c9.jpg" />
The battery compartment cover to open a small hole (not recommended warranty we make alterations), the charging wire made extended. The two belts were later started with a spare battery. The installation dimensions were not suitable and they were directly outside the battery compartment.
After playing for a few days, I feel more and more yaw. Check it out, it is a blade motor shaft gear end cracking.
Although it took less than 7 days to start, but he has already changed the battery compartment, return is impossible, and get it yourself. After looking at the bad reviews on JD.com, many people have encountered the same situation. It seems that this is a hard injury. Disassemble the motor protection cover and remove the big gear (the two top wires have been broken because of the high-speed rotation strength is not enough). The two top wires are not used. Use the paper clips to cut the length (approach nod) instead. Use glue (try a lot Glue, AB glue is best used to fix, re-installed and fly, as it was.
Afterwards, the other three paddle gears were also fixed with glue.
After playing happily for a month, the situation of serious yaw (towards the right front) again occurred. It was not even possible to take off. It was only pivoted to the right in front of the place. There were no abnormalities in all aspects of the inspection machine. Baidu took a moment and many people said that it was a gyroscope failure that did not return to zero. According to the online method and reference to the product specification, the gyroscope was repeatedly calibrated, no matter how it was used. After dismantling (my professional radio technology), observe that there is no abnormality in the wiring of the receiving board, and there is no looseness.
Subsequent welding of the large solder joints on the receiver board did not have any effect, and the fault persisted. The right front and right rear motors were reversed and the aircraft yawed rightwards, thereby eliminating the malfunction of the gyroscope and the receiving board and confirming that the motor was faulty. Initially thought it was a bearing failure, maintenance with a lubricant for several days, failure as usual. Just when I was about to give up, my colleague found me an old model aircraft motor. Although the installation dimensions were different, I tried to change the filter board on the top of the motor. There are 3 capacitors on the filter board, which mainly serve to protect the motor against interference.
This is the original motor that replaced the filter plate.
After installing the school level test machine, one gets to know that the familiar feeling is back and finally repaired.
In short, although this is an entry-level low-end product, it contains many scientific principles from design to production, which brings me and my children a lot of joy.
Finally, give some of the safety advices of the value-loving model-loving toy players, play the model airplanes, keep a low profile, and stay away from crowd safety.