There is no preheating in the cold weather, no flight to check, no aircraft installations... The problems caused by operational errors before flight can not be ignored. From the previous 300-day flight interviews, the UAV Academy has summed up 10 stories of experience that have affected flight safety due to pre-flight operational errors.
Â
â–²The weather is not warming up
Â
I once took a large panoramic view of the construction site. At that time, the temperature in winter was about 2 degrees. The battery was not warmed up before the plane took off. The power was 25.2V during the takeoff . The plane flew out and the position shown in the picture was 500 meters. M, just when we were going to finish the hovering, the battery of the aircraft instantly dropped from 22V to 18.4V , and I thought it might be a bomber . At that time, the plane was almost 700 meters away from me . Below is the expressway, there is a high-voltage tower nearby, and the Yuntai is out of control!
I don't know the condition of the nose. I didn't have time to think that the throttle was full and I would pull back until the plane landed safely. At this time, I was relieved. The whole winter was full of cold sweat. At that time, the aircraft showed a very large body tilt, and you can see the nose arm completely when you look back at the picture! The battery display shows only 17.9V ! Under normal circumstances, this is destined to be bombed, even if the battery is not blasted, but fortunately the plane is safe and the battery does not have a drum kit. Through this lesson, as long as it is a winter flight, I will warm up first to ensure that there will be no power failure. Xi'an college student Fei Guoxu: Once the aircraft battery was not preheated
Â
At the beginning, I knew very little about the drone. I shot the snow at a very low temperature and the battery was suddenly powered down. I didn't know how to warm up the battery first . I was very anxious, and I quickly controlled the slanting of the plane and landed in front of myself. When I was at my feet, there was no electricity. It was too thrilling. From then on, my battery must be warmed up before the winter flight, and I have never flew the aircraft since I flew the rotor for four years. From: "German Roe, who has never bombed a flying rotor for four years: it is meaningless to fly too high aerial photography"
Â
â–² go to fly without checking
Â
The wires are not arranged to cause magnetic compass interference
One of the most impressive flights was a lost machine. Due to the excitement of the installation, I went flying without checking. The sky was dark, and the aircraft gradually lost its control because the wires were not sorted and the magnetic compass was disturbed. Picking up the control home, looking up the mountain at night, the pants were cut by the branches, and the face was scratched and I didn’t know. After dragging the house for a few days, he found it in a reservoir dam. It was two or three meters away from the water. The plane was buckled on the ground and the battery was seriously over-discharged. It was a dangerous flight. From: "China Eastern Pilots Really Share Sharing - 22 -year-old Liu Jishun tells you how to design your own drone"
Â
Did not check the battery plug before takeoff
When I was on aerial photography, the experience was not very good at that time. I had neglected an action before taking off, did not check the battery plug . When I flew for 6 minutes, it was 115 meters high. When I hovered over the sky, the aircraft suddenly went off. , out of control bomber. The lesson learned from this accident is that a comprehensive inspection must be done before take-off. Even a plug or other safety hazard may cause a safety accident. From: What data is recorded after the flight? Plant protection flying hand Guo Jian tells you
Â
The tightness of all the screws was not checked before take-off, and the small screws fell off and the aircraft was out of control.
When there was an aerial photography, the small screw of the helicopter tail rotor fell off and the helicopter was out of control . The situation was very special. There were a lot of people below. The final result was satisfactory, because my basic skills were still solid, after more than 5 minutes. The adjustment eventually landed the plane in an unmanned area. Although the plane was bombed when it landed, no one was injured because of the incident. After these two things, I want to remind everyone that the power must be disconnected during the process of debugging the aircraft. The electric engine should disconnect the three power lines of the motor. Remember to check the tightness of all the screws of the aircraft before flying! This is almost always the experience of using life! From: "Zhang Yanwei, a flying hand who exchanged blood for his lessons: the screw on the plane must be screwed."
Â
The road was bumpy and the screws were loose and checked out beforehand . I went to Shenzhen from Shenzhen to do an aerial mission last time. I checked all the things in Shenzhen. It may cause some accessories to loosen on the road. I will electrify and check all the electronic equipment in the hotel that night. There is no worries when I go to shoot in two days. We have also encountered a test flight at home before, and when the filming is taken, the plane has either a problem with the picture or a problem with the platform. Checking in advance will reduce the embarrassment of working outside with people. From : Hanlai faculty Zhao Yingjun: How about the employment of the students who participated in the drone training ?
Â
That day was a six-axis machine, using the Dajiang flight control, the machine used for about a year, no maintenance inspection, ready to unlock the take-off after the power-on self-test, but can not unlock, see the LED indicator is no abnormal However, it is impossible to unlock the takeoff. At this time, my colleague said that the power cord was unplugged and reconnected. At that time, I thought that the plug and solder joint of the electronic device were loose or oxidized, but the colleague said nothing. I just said it, I didn't try to check and rule out the problem . After the second power-on self-test, it was able to unlock and take off, but after 5-6 minutes of flight, the aircraft propeller stopped rotating and fell from a height of 3 meters. When flying, it was on an empty grass. Fortunately, the machine did not reach people, and the machine itself did not have much damage. From : The first beauty teacher in Hunan Province Xiao Wei: How do I treat the students?
Â
No , the response plan is complete beforehand. Only once, after one operation, the landing site suddenly changed temporarily, especially narrow, especially short runway. Under the urgency, we carried out the B plan, the block landed, and the interception net was supported . The 15KG aircraft succeeded before it rushed out of the runway. Intercept. This is also the preparation for the work before the test flight preparation is in place . Considering any environment, there should be a corresponding alternative in any emergency. From : "Fly Hand Li Yanjun: After the accident occurred in the landing fixed wing, the interceptor network was successfully intercepted.  》
Â
â–²The plug is not plugged in well
Â
The aircraft took off and the vibration broke the plug that was not plugged.
I remember to shoot outdoor activities once. After the scene, I started the work normally. After the event started, I also took off smoothly. Only when I flew more than ten meters away, there was no signal at all. I pulled it back and landed. After landing, I immediately had an image and checked. If you don’t come out, you will take off. Still did not fly a few meters and no pictures, and pulled back to the ground and there were images. At that time, there was no solution at all. Repeated inspections, take-offs, and landings were all like this. Everything was checked or not, and the result was over. No shots were taken. When I decided to accept the equipment, I suddenly thought about whether it was a plug problem on the GH4 . I checked it carefully and found that the camera end of the video conversion module was not inserted in the end . The take-off vibration of the aircraft caused the unplugged plug to fall, resulting in a broken screen. It's open. From: "I believe that flying is a flying nine-pointed flying hand Yin Xiaoshuai tells us how to choose a plant protection machine"
â–² Commissioning aircraft
Â
When the aircraft was commissioned, the power was not turned off, causing the propeller to suddenly rotate.
Playing the drone has made me remember two security aspects. One is that I did not disconnect the power when debugging the plane, causing the propeller to suddenly spin up and cut my face and hands. There is a place on the face that is very close to the eye. If it is nearly a millimeter, it is estimated that one eye is blind now. From: "Zhang Yanwei, a flying hand who exchanged blood for his lessons: the screw on the plane must be screwed."
Â
After the aircraft is tested: the hand does not pay attention to the remote control throttle and pushes the maximum throttle
The most memorable story about the use of drones has been the flying of a newly assembled 450 helicopter. After the flight test was completed, the remote control was put on the ground and ready to reach out to power off the fuselage. The hand did not pay attention to the remote control throttle and pushed the maximum throttle. The aircraft propeller took off at the fastest speed and took off the slope. It is taking off obliquely, assuming a vertical takeoff, the consequences are unimaginable. Therefore, it is recommended that some new friends who love models or drones should fly cautiously and fly safely! No matter what type of machine you are using, fixed-wing, multi-rotor or helicopter, it is full of great lethality. You must pay attention to personal safety before flying. From: "Flying Hand Zhou Zhenhua: Recommend 450 Hot Wheels to teach you to master flying skills from scratch"
Â
â–² did not adjust the calibration well
Â
GPS is not adjusted well
The most impressive thing was that last year, I went to the aerial photography of Dali Lake in Inner Mongolia. The wind on the lake was relatively large. Because I just used the drone at that time, the control process was wrong, the basic skills were not familiar, the GPS was not adjusted , and I flew up. Flying very far, the sky was dark, I couldn't find the plane at the moment, I thought I couldn't find it. Several friends helped me to see which direction the plane was in. Later, I generally knew where it was. I used the remote control to know where the plane was heading. I knew that I would pull back and let the plane return. It is. Therefore, I think it is necessary for the novice to learn to look at some parameters of the software on the mobile phone, such as knowing the height and direction of the aircraft, so that the aircraft can know which side the aircraft is flying, even if it is not in the line of sight.
From: "Beijing Flying Hand He Huijun: Newbie must see software parameters take off according to standard procedures"
Â
Flying in a strange environment without recalibrating the compass
One of the most profound things about the drone was that my first drone was just set up very well. At that time, I used APM flight control. I debugged the flight at the school’s West Field and track field. After switching the GPS mode flight, it took a few seconds to fly. The attitude began to be uncontrolled, flying to the right side of the high-speed side. At that time, I had insufficient experience in controlling the aircraft. I did not switch to the manual mode to save the machine in time. Finally I watched the plane hit the isolation net. The broken arm was after the impact. Flying more than ten meters away, I felt scared afterwards. If it was flying in a crowded place, such a loss of control must have extremely serious consequences. It was later inferred that the compass was disturbed . Since then, if you are flying in a strange environment, be sure to re-calibrate the compass, and the aircraft must set the self-stabilization mode, once the GPS and compass problems, switch in time.
From: What are the consequences of the uncalibrated compass? Hunan Agricultural University Air Model Team Flying Hand Longbo tells you with personal experience
Â
â–²The aircraft device is not installed
Â
The IOSD is not installed and the aircraft power cannot be monitored at all times to determine the return time.
Shenzhen Ruidian Technology CO., Ltd , https://www.wisonens.com