Category: Air

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    Crashing a drone, even one with obstacles avoidance sensors like the DJI Mavic Pro, isn’t hard at all. Small falls from a desk can also put your drone out of commission, easily damaging the sensitive camera lens or gimble. For those of you with DJI drones, they’ve got a fairly polished repair service you’ll hopefully never have to use. But things happen.

Here’s how the DJI repair process works and whether or not it’s worth the hassle, cost, or time waiting.

Recover The Drone

First off, I’m writing about the repair process without any kind of warranty, such as the DJI Care repair and replacement plan. So here you are, you’ve crashed or otherwise damaged your DJI drone and wondering why you didn’t spend the extra $99 to get it insured. Whether you have the warranty or not, you need to retrieve the drone. It’s the reason you see people diving into rivers or me throwing car cushions at trees on YouTube to salvage what seems like a lost cause.

  DJI Mavic Pro Fly More Combo: Foldable Propeller Quadcopter Drone

Once you’ve got your smashed, waterlogged, pathetic looking drone back, log into the DJI website, and head to the repair page.

Find A Service Center

DJI has authorized services centers in over 100 countries (they even list Yugoslavia – not sure what that’s all about). Pick the service center closest to you and select your specific drone (e.g. Phantom 4). The next few pages are where you describe the damage and how the accident occurred.

• Don’t Lie – You might not know it but your drone keeps very details flight records (you can access from the DJI app). Every movement of the drone and controller input is recorded so forget about trying to make a crash seem like a manufacturer defect.

Choose whether or not the damage is a manufacturing defect or pilot error, remove the microSD card, pack up the drone, and send it to the DJI Service suggested to you.

• Shipping Fees – DJI provide you with a shipping label, covering the shipping, but not packaging, costs.

The average shipping time is about a week, depending on where you’re shipping from of course.

Your Drone Knows A Lot About You

DJI has a repair tracking page whose only purpose seems to discourage you from sending them emails asking where your drone is. Once the technicians get a hold of your drone though, they email you a detailed record of what an idiot the exact events of the accident. Mine went something like this, which you can compare to the crash video below.

Unit was in P-GPS mode and was responsive to RC input; 2. At t=237.9s, relative height=7.1m, unit recorded external impact, then rolled over and fell. 3. User commanded full stick forward toward a tree in a parking lot until 1s before impact. User pressed left turn, backward, right turn, descent, and rightward 1s before impact but forward momentum carried unit to the tree. 4. Obstacle avoidance could not detect fine tree branches due to hardware limitation, especially during winter with no leaf on. Conclusion: User stick command error. Impact in air.

DJI Repair Costs

Obviously this will vary depending on your specific repairs but here’s a general breakdown of the costs, which is contained in that same email with the crash report.

• Gimbal Camera Component: $101
• Camera Flexible Flat Cable: $3
• Back Left Motor Arm: $19
• Gimbal Vibration Damping: $2
• Gimbal Mounting Bracket: $1
• Camera Co-axis Cable: $5
• Front Left Motor Arm: $22

The service costs $65 an hour – the total work took two hours, added $130 to the cost.

• Total Repair Cost: $283

Those of you who have DJI Care, if the crash is covered, you only pay up to the warranty. (Varies by drone but for example the Mavic replacement with DJI Care is $79 for the first drone; $139 for the second.) In the email DJI sends back with the costs, they have a Paypal link, where you can decide to pay for the repair or not. Repairs are not started until you make the payment and shipping costs are not charged unless you reject the repair.

Expect To Wait

Clearly, the camera is the most expensive component with labor adding the other bulk of the costs. I was surprised not to see the body, or other parts listed since there were major dents from the fall. I figured DJI would ignore what was probably aesthetic damage but happily surprised when the Mavic was finally shipped back from repair.

• Repair Time – Whatever the repair status page says, it will take about 4 weeks.

A drone repaired by DJI is essentially refurbished. There won’t be any signs of previous damage, scratches, or dents. Damaged parts are replaced and repairs are very thorough for the price, essentially 28% the cost of a new drone in this case.

Important: Calibrate Before You Fly!

You may have noticed a few nicks on the Mavic photos in this post and be asking yourself, hey, I thought he said there weren’t any visible marks?! Well, there weren’t when I originally got the Mavic back from DJI but I crashed it nearly immediately. It was indoors for a small test but the Mavic slowly veered left, hitting a wall, then I used the emergency controls to shut off the propellers. I was lucky to have dodged another trip to the service center.

After looking at the flight records, I realized why the drone wasn’t hovering stably on a horizontal axis. Although DJI tests drones they repair before sending them back, it seems they don’t calibrate the Inertia Measurement Unit (IMU). The IMU orients the drone so when it’s not calibrated properly, it usually drifts.

• Calibrate All The Things – Be sure to calibrate the compass, IMU, remote controller, and gimble prior to flying any drone you get back from repair.

The DJI repair process is a thorough, but slow, process. Best to avoid it altogether by doing these 12 things before you ever fly a new drone, which will go a long way to prevent a crash in the first place. Given how easy it is to damage your drone combined with the cost of repair makes getting the DJI Care plan all the more sensible. The DJI Care plans cost about 10% the full price of a new drone plus cover two replacement units over the first year – whether or not the damage is your fault. Since it’s a very cumbersome process to add the DJI Care coverage after you’ve purchased your drone (with no guarantees), keep it in mind and part of your budget when shopping.

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    Drones offer a photographic flexibility no tripod can but are powerful, delicate aircraft that are surprisingly easy to crash. I learned this the fast, hard way, as you can see in the video above: by crashing a new DJI Mavic Pro right into a tree branch on my second day of flying. Despite being in an essentially empty parking lot, I still managed to down a drone equipped with obstacle avoidance sensors.

Drones sent back to DJI for repair are essentially refurbished, with nearly no visible sign of previous damage. Once I got the Mavic back, I flew it in a living room… for about a minute, before another (albeit) minor crash.

As I said, drones are very, very easy to crash, which is probably why we hear about it so often in the news. Since those first mishaps, I’ve flown successfully for hours, shooting travel videos around the world. Other times, I’ve taken the Mavic out to open spaces, pushing it to its limits in a variety of weather conditions. Those early crashes taught me a lot about how to avoid crashing. Here’s what I recommend to any new or inexperienced drone pilot about flying, to protect your drone, the people, and places you’ll be filming.

1. Start Small

This is a hard piece of advice to follow admittedly, but if you’ve never flown a drone before, getting a serious machine like a Phantom 4 is akin to hopping into a Lamborghini right after receiving your driver’s license. Smaller drones like the Parrot Bebop 2 are more difficult to pilot since they lack the advanced stabilization features of more expensive models, giving you a very good feeling for quad-copter flight. They’re also less powerful, moving slower, staying lower, and being less expensive, not as costly if you make a mistake.

2. Read The Entire Manual

Whether or not you completely ignored the first piece of advice above – read the entire manual of any drone before using it. Learn the controls and practice them, with everything turned off. When I first hit a tree, I attempted to turn left out of the way. All I ended up doing was rotating on an axis because I knew the controls but wasn’t familiar enough to use them unconsciously. You need to be able to use the drone controls without having to think about them, like riding a bike.

• Particular Features To Review Well – Return-to-home functions, emergency shutoff, pause buttons, can all get your drone out of trouble quickly. Hopefully you’ll never have to use any of these functions but knowing about them can protect you as well as other aircraft and buildings against collisions.
• Don’t Rely On Automated Avoidance Systems – A good feature in concept but in practice, they only detect large, solid objects. Obstacle avoidance is a good fail-safe but never assume its going to save you from smashing into things.

3. Don’t Fly Indoors

Drones are hard enough to fly outdoors. Many people think the propellers of a drone will power through a small nick of a wall but what really happens is as soon as they touch anything, it’s game over. Indoors there are more obstacles to hit plus walls dampen GPS signals. Depending on the drone you have, losing a GPS signal can mean your drone switches back to a less accurate positioning system (e.g. ATTI mode on some DJI models). At best the drone will drift a meter or two horizontally – not a problem in most cases outdoors – inside though it could easily run you into a wall.

• Return To Home Trouble – Many drones have a ‘return to home’ function that’s activated when the drone loses signal with the remote. Typically, there’s some preset altitude the drone will ascend to in order to avoid obstacles, then try to fly back to where it took off. You don’t want ‘return to home’ to be activated indoors since the drone might shoot right up into your ceiling. Yes, you can turn off return to home or set the drone to simply hover if it loses a connection, either way you’re still taking a big risk of an indoor collision.

4. Become Familiar With The Drone App

Now that you’ve become a bit familiar with the remote controller, it’s time to power it on and the drone. Don’t take off yet. Many drones use a mobile app to give you a large variety of flight and video controls. Since your drone app probably won’t be fully functional with the drone turned off, keep it on the ground, power on, and become very familiar with the options. Set the important features: return-to-home (set default altitude as high as allowed), maximum altitude, distance, enabling beginner mode if available.

• Simulator – A lot of drone apps (DJI, for example) have flight simulators built-in. Simulators are a fantastic way to get comfortable with flight controls while getting a feel for the drone’s sensitivity, without any risk.

5. Respect The Weather

All manufacturers list maximum wind conditions you shouldn’t fly in. I have tested the Mavic Pro in winds higher than are recommended and found unless you are flying in winds much stronger (double or triple) the recommended maximums, it probably won’t bring your drone down. What wind does though is noticeably move the drone on its horizontal axis making it much easier to hit nearby objects. Especially difficult become landings – the stronger the wind the larger the landing area you’ll need to touch down safety. Beginner pilots should stick to calm skies only when starting out, and no matter how experienced you are, be aware of the risks of going over recommended limits.

• Rain – Unless your drone is waterproof, don’t push your luck by flying in wet conditions as it’s quite dangerous. A battery that shorts out in midair can turn your drone into a small rock falling from the sky.

6. Learn The Laws

Contact your local, then national, aviation administration if they don’t already have the relevant drone laws listed online.

7. When Flying, Avoid Pushing Control Sticks Full Throttle

This is important: be gentle with the controls! Most drones have powerful motors guided by sensitive joysticks. Drones can move sharply with light touches and really take off if you hit the gas push the sticks all the way in any direction. Many drones have some options for reducing the sensitivity of the controls. Personally, I don’t like doing so in the case I need to maneuver quickly (seagulls are not your friend) but many other drone pilots prefer to keep the controls toned down.

• Sports Mode: If your drone has one, make sure it’s off. Every time.

8. Fly In Wide, Wide, Open Spaces

Flat lands with nothing around for as far as you can see are ideal.

9. Practice Moving Vertically, Then Horizontally, Then Both

Get comfortable going up and down first because it’s the easiest direction to navigate in most situations. Then take baby steps moving forward, backward, left and right. Once you’re comfortable manipulating vertically, then horizontally, independent of one another, you can begin combining the two. Slowly, of course.

10. Generally: The Higher, The Better

Speaking broadly, the higher up you’re flying (as close to the legal limit, of course), the safer your drone is. There are few things to hit at altitude despite our tendency to feel safer flying closer to the ground. Practice honing your instinct so you go up when flying across areas, or have obstacles in your way. Going over, not around, objects is a mentality that can take time to internalize.

• Birds – As a general rule, birds don’t bother things above them. Try not to fly underneath birds. If you see a hawk or eagle, it’s best to land, as they might mistake your drone for a stupid, slow bird meal. Seagulls have a habit of chasing drones while crows tend not to bother them if they’re alone. Groups of crows (called a “murder”) grow bolder, seemingly daring one another to “try and kick that thing out of the sky.”
• Wind Drafts – Drones hover unless you fly them otherwise. Birds do not hover. Updrafts, common around mountains, cliffs, and hills will send gliding birds up and down. Be conscious of how the winds are flowing since any nearby birds will move in the same direction.

11. Look At Your Drone, Not The App

After some successful flights, you’ll feel more at ease navigating with your drone app, as opposed to visually maneuvering it. Although drone apps typically have GPS maps, direction readings, and other very useful information, it can be tricky to look down at your remote controller too long before you get the hang of basic flying.

• Directional Guidance – Drones that are high up in the sky can be difficult to orient by eyesight. Most drone apps have a directional arrow showing you which way the drone is facing relative to you. Being aware of this feature – and finding it – is why you practiced so much with the app before ever flying.

12. Landing Is The Hardest Part

The first step for a good landing is to have a good takeoff point. In calm conditions, the size of the landing pad should be at least twice the width of the drone itself. Give yourself more space if there’s wind, remembering not to force a landing if the drone moves in a gust as you’re coming down. Take your time landing and make things easy for yourself by choosing an area without any stones, high grass, or other obstacles around.

Take Things Slow

This may seem like a rather long post about not crashing your drone but the truth is there are many ways an accident can occur – most of which are caused by pilot error. You can avoid trouble by thinking like an airline pilot: know the machine you’re flying well, give everything a width berth, focus on safety, and don’t fight the flying conditions.

Remember to learn how to fly, then work on using your drone as a camera. Once piloting the drone becomes second nature you’ll be able to concentrate on creating wonderful travel videos from your trips.