Colin Devroe

Reverse Engineer. Blogger.

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What the FAA really just said about drone encounters

You’ll likely read a headline on your favorite news site today that reads as if the FAA has said drone strikes are up for 2016. And they likely are – as there are a lot, lot more drones in the air this year compared to last.

However, what you won’t read is this bit from the FAA’s report:

Although the data contain several reports of pilots claiming drone strikes on their aircraft, to date the FAA has not verified any collision between a civil aircraft and a civil drone. Every investigation has found the reported collisions were either birds, impact with other items such as wires and posts, or structural failure not related to colliding with an unmanned aircraft.

The actual data confirm that “encounters” are up not strikes. But sightings of drones don’t make for good headlines.

Observations about flying a DJI Phantom 4 Pro

Maria Langer, professional helicopter pilot, blogger and Twitter friend, got her DJI Mavic Pro on nearly the same day as I got my DJI Phantom 4 Pro. She’s taken the time to write down her thoughts on the experience and so I thought I’d quote her post since she and I agree on our first few flight missions. We also purchased a professional drone for the same reason:

And that’s a big part of what this drone is to me: it’s a tool for making photos and videos. While some people buy drones for the flying aspect of them and actually race them around obstacles, etc., I have no intention of doing that.


Here is a good tip about landing and taking off from the ground:

And if there’s dust, that dust is going to fly on landing and take off (just like with a helicopter) and possibly get into rotor heads or gimbal parts. I had the foresight to order a foldable landing pad to operate from — this helps ensure a safe, clean environment for operations.

As often as possible I take off and land from a small foldable table that I keep in my Jeep for this very reason. I don’t want to land in snow or in wet grass or, as Maria points out, in a dusty area. And, although I’ve seen others do this, I do not want to (nor should you) catch my drone.

She also notes something I had trouble with too:

The only real complaint I have about the design is related to the plastic clamp that holds the gimbal immobile during transport: I have a heck of a time getting that damn thing on. I assume I’ll better at it one of these days; I sure hope it’s soon.

I agree with her on this. But, gimbals are fussy things. They are free moving and so very hard to get into the right position to get this clamp in place. However, her assumptions are correct, the more I’ve done it the better I’m getting at it.

Maria regarding the app and controller:

There is a lot to learn about the controller and the DJI Go app. Yes, you can pick it up and fly it almost immediately with just a few pointers from a friend or a quick glance through the manual, but you will never master either flying or photography — which really do need to be considered separately — without reading the manual and trying various features until you learn what works for you.

The app is incredible. It has many features for controlling the drone, the camera, for programming the drone to do actions autonomously, and more. I’m super, super impressed with the app and I know it will be months before I feel comfortable with every feature. On the other hand, the app is terrible at transferring files. I recommend getting a card reader as soon as you can for this.

Be sure to read the rest of her post as her experience is based on the Mavic Pro.

I’ll add a few things; first, the speed of the Phantom 4 Pro. Even though I’m using this as a camera it is fun to get some wind under the props now and then. Sport mode is essentially what I was used to with my other, inexpensive, featureless UAV in that it turns off all obstacle avoidance and goes all out. I’ve flown my drone over 50MPH according to the app. At that speed it is really moving. It is impressive.

The engineering that has gone into this device is pretty staggering. The app has features for following objects, orbiting points of interest, you can draw on the screen where you want the drone to fly and it does it. There are also preferences for nearly every single setting. And, I’ve found, for the most part this thing is impossible to crash. I’m afraid to write that sentence but I do believe that if I crash this drone it will be my fault and not the fault of the drone.

If I could just warn others that the ease of flight can cause complacence. Flying a drone is a serious responsibility. Not only are you flying a device that likely set you back a few thousand dollars but you’re more than likely flying over some property that may not belong to you. And as Maria has pointed out in the past, you’re also flying in shared airspace. This drone can fly itself but I’d still recommend you create your own pre-flight checklist. Here is mine that I’m continuously adding to.

I’m only a few missions into having this new drone but I can say that I’m very happy with my investment so far. I’ll report back as I learn more.


My drone pre-flight checklist

Since I shared my hiking checklist I thought I’d also share my always-a-work-in-progress drone pre-flight checklist. Not every question on this applies to every single situation and some of these rules you may be willing to bend or break depending on the circumstances. But, having a checklist may help to reduce the number of mistakes you may make.

  • Are batteries in drone fully charged?
  • Are batteries in controller fully charged?
  • Are batteries in phones or tablets fully charged?
  • Are the drone’s props in good repair?
  • Are the drone’s props fully secured?
  • Am I near anything that could cause signal interference; lots of metal, radio towers, buildings?
  • Will I have line-of-sight for my entire flight?
  • Do I have the maps of the area I’ll be flying downloaded to my device?
  • Would it be good to have a spotter keep an eye on my drone while I look at the video output?
  • Are my camera settings set for the video or photos that I’d like to take during this flight?
  • Is the memory card empty?
  • Is the area I am flying legal?
  • Is the wind speed safe?
  • Is there any precipitation expected in the area during your flight time?
  • Check all settings in your app are what you’d prefer for your flight.
  • Have I unfastened the gimbal?
  • How high do I need to fly for my entire flight path in order to be safe?
  • Can I possibly get closer to my target area before taking off?
  • If something goes wrong, do I have a second landing area that I could possibly go to?
  • Is the area between my landing zone and my target an area I can access?
  • Will I be flying over private property or can I avoid that?

These simple checks can, perhaps, save you from making a mistake that could cost you a lot of money or battery time or frustration.

Maria Langer on drone safety

Maria Langer, helicopter pilot:

As a helicopter pilot, I’ve felt a rather unique threat from the rise of drones (no pun intended). I want to take a moment to explain, mostly because although my general opinion of drones has changed, my views about their threats have not.

This is an important post to read if you, like me, fly a drone. Also important if you’re getting one as a gift this weekend. Be mindful that the skies are full of other people not just devices.


Aerial, Lackawanna State Park – July 2016


Aerial – July 2016


UAV, Lackawanna State Park, PA – October 2016


Phantom 3, Promised Land State Park – September 2016

The UAV took a bad tumble

Yesterday Jehu II took quite a tumble.

I’ve been doing a lot of flying. Nearly every day. And though the Syma X8G would be considered by most to be a “toy” (which is a designation I agree with for sure) it has enabled me to get quite good at flying. So much so that two local aero clubs have told me that I’m “far from a novice”. I’ll take it.

The weather lately has been great for flying. Warm, windless evenings make for some of the most picturesque, enjoyable and relaxing flight times. And last evening was no different. So, why the tumble? It was the result of me being a bit careless, of course.

I’ve had a few hairy experiences that I’ve managed to pull out of unscathed, which makes last night’s tumble all the more disappointing. One happened about a week and a half ago. I was flying alone at a local park and there is a wind stream that comes off of the nearby lake that pushes your craft out and away from the landing strip. Just a few days prior someone had told me that a pilot lost a new, fairly expensive, somewhat autonomous UAV, in this same wind stream. That UAV had “return to home” and that didn’t even work. The UAV is lost.

I met this pilot on Wednesday. I felt bad for him. And I told him how I got caught in the same wind stream but managed to get my UAV back. How? Well, for a few moments I too thought my craft was gone for good. Even at full-throttle the UAV simply wasn’t strong enough to fight the wind current. And it was quickly 500′ away and 150′ up. The only way to get the UAV back, I found, was by getting as close to the tops of the trees as possible (probably 60-80′) and zig-zag slowly back and forth towards me. At 500 or so feet away, and using only line-of-sight, it is hard to tell how close you are to the tops of trees. But after several minutes of fighting the wind I was finally able to get in front of the tree line and swoop low enough to come all the way back. It was a nail biting few minutes.

Last night, though, came down to simple distraction. A young boy showed up where I was flying with his – I think – grandmother. The moment he was out of the car he made a B-line directly to me since he saw me flying. His grandmother had absolutely no control over this even though she was trying to get him to come back. He was immediately rifling through my things and asking to fly the UAV. I looked away from where I was flying for just a moment to see what he was doing and came down pretty hard for a tumble.

Jehu II cracked

Here is the result, a cracked body.

The crash was my fault, not the little boy’s. No matter what I should keep my eye on the craft until it is down safely.

Today I’ll spend some time seeing if Jehu II can be repaired enough to squeeze a few more flight hours out of it before I hang it up for good and get something new. The more I hang with the aero clubs the more I’m considering getting a plane. But something is still pulling me towards an upgraded UAV with GPS and a nice camera. I wonder what I’ll end up with.

Update: A bit of glue and some tape and Jehu II is flying just fine.

Hiking the Dunmore Pine Barrens

Dunmore Pine Barrens panorama

Yesterday fellow UAV pilot Jonathan Edwards and I hiked to the “top of the world” at the Dunmore Pine Barrens to get some exercise, see the sights, and fly a little.

I decided to hike this area because of local hiker, writer and blogger Jeff Mitchell’s blog post wherein he details the hike. He provides specific detail for parking and getting to the top which undoubtedly saved us a few minutes of spinning in circles. Here is a snippet of his post:

According to Google Earth, this place is called High Rocks.  Layers of mist and slow moving clouds hung in the valleys below.  The tops of the plateaus rose just above the mist.  The sunrise cast the cliff in hues of amber and orange.  I could see for about 20 miles across the Pocono plateau.

Mitchell hiked in the wee hours of the morning to catch first light or dawn time. Jon and I left the lot at around 4:30pm or so and hung out at the top until just after the sun dipped below the far horizon. My guess is that dawn is a completely difference experience on that ridge so I expect to give it another go in the future.

iPhone timelapse dunmore pine barrens

cliff at pine barrens in dunmore

sunset from dunmore pine barrens

Yesterday’s weather was perfect for a hike. The round trip was about 6.2 miles (according to my iPhone) and I would say that just about anyone could make the trek. Just be very careful on the cliff.