Does OA depend on speed?

shegeek72 · Apr 22, 2018

My Spark hit a tree and crashed. I'm a novice, but thought obstacle avoidance would prevent such collisions. After recovering it I did some tests trying to replicate what happened and it did beep when getting close to similar objects, but I was going much slower than the crash. Does OA actually stop the drone's flight or just give a warning beep? Why didn't it warn me when approaching the tree?

killswych · Apr 22, 2018

shegeek72 said:
My Spark hit a tree and crashed. I'm a novice, but thought obstacle avoidance would prevent such collisions. After recovering it I did some tests trying to replicate what happened and it did beep when getting close to similar objects, but I was going much slower than the crash. Does OA actually stop the drone's flight or just give a warning beep? Why didn't it warn me when approaching the tree?

These things aren't perfect, maybe 80% of the time it will work

RaWine · Apr 23, 2018

shegeek72 said:
. Does OA actually stop the drone's flight or just give a warning beep? Why didn't it warn me when approaching the tree?

It will see a trunk, or large limbs, but not necessarily the smaller branches and twigs. If it's dense enough it will detect that also.

RaWine · Apr 23, 2018

Also, the faster it is going, the more distance it will take to stop.

shegeek72 · Apr 24, 2018

According to dji.com/support in answer to the questions: "What is the obstacle sensory range of the 3D sensor in the Spark? What is safe flight speed?" A: "The 3D sensor in the Spark can detect obstacles accurately within 5 meters. The Spark can fly forward safely at 3m/s [6.7 mph]." According to the flight log my max speed was 7.34 mph.

RaWine · Apr 24, 2018

I've had mine hit some small twigs, then it kind of ricocheted hitting more, but didn't crash. It was a good thing it didn't crash because I was on a wooden bridge and it would have fallen into water.

My propellers were knicked up some, so I switched to a new set. Not absolutely necessary though. It will fly with minor knicks if that's all you have. But since I had a clean set I switched. Saved the knicked ones, if I really need them.

If intentionally flying close quarters to objects like that, not so bad to consider putting prop guards back on if they are off.

Takes some flying time to get more skill. But like anything, you can still make mistakes and hit something.