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Inverted Free Fall!!
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<blockquote data-quote="Chips" data-source="post: 53585" data-attributes="member: 2322"><p>I've had the motors shut down while in LANDING mode and the battery still had plenty of juice. It had been on RTH and then when it arrived 100 metres over the home point, it began descending. At 80 metres, the motors shut off and it went into free fall. I saw it coming down and fortunately, it hit a soft awning, bounced back up and I saw the props spinning again so I tried the sticks and regained control. Brought it back to land near me and checked for damage, which it didn't seem to have. The incident bothered me a lot and I lost trust in the Spark, and went out and bought a Mavic Pro.</p><p></p><p>But last week, I tried flying the Spark again and it seems to fly okay so I still need to fly many more times before I can decide if I can trust it not to shut down again. The reason is unknown and one of the more knowledgeable guys here looked at my flight data and did not see anything unusual other than that the descent speed was double what it would usually be. There was no strong wind at the time, unless there was a jet stream at 80 metres although in my case, it didn't flip upside down. </p><p></p><p>Your case is incredible and my first thought was that it was a strong gust of wind. I read somewhere that if the Spark goes upside down, the motors automatically shut down - a sort of built-in safety feature. I learnt this because there was a time when I lost signal link after takeoff and the drone began to slowly rise and I could not bring it down. I had to grab it and pull it down and then shut off the battery to kill the power. Yes, people will say that the drone is supposed to RTH when link is lost but there was some technical problem, I think.</p><p></p><p>As I often say, a drone fall out of the sky is bad news and yes, you will probably have it destroyed although in your case and mine, we're lucky that there was no damage. What's scary is for it to fall onto someone or onto a busy highway and cause an accident. That's what makes me tense whenever I fly.</p></blockquote><p></p>
[QUOTE="Chips, post: 53585, member: 2322"] I've had the motors shut down while in LANDING mode and the battery still had plenty of juice. It had been on RTH and then when it arrived 100 metres over the home point, it began descending. At 80 metres, the motors shut off and it went into free fall. I saw it coming down and fortunately, it hit a soft awning, bounced back up and I saw the props spinning again so I tried the sticks and regained control. Brought it back to land near me and checked for damage, which it didn't seem to have. The incident bothered me a lot and I lost trust in the Spark, and went out and bought a Mavic Pro. But last week, I tried flying the Spark again and it seems to fly okay so I still need to fly many more times before I can decide if I can trust it not to shut down again. The reason is unknown and one of the more knowledgeable guys here looked at my flight data and did not see anything unusual other than that the descent speed was double what it would usually be. There was no strong wind at the time, unless there was a jet stream at 80 metres although in my case, it didn't flip upside down. Your case is incredible and my first thought was that it was a strong gust of wind. I read somewhere that if the Spark goes upside down, the motors automatically shut down - a sort of built-in safety feature. I learnt this because there was a time when I lost signal link after takeoff and the drone began to slowly rise and I could not bring it down. I had to grab it and pull it down and then shut off the battery to kill the power. Yes, people will say that the drone is supposed to RTH when link is lost but there was some technical problem, I think. As I often say, a drone fall out of the sky is bad news and yes, you will probably have it destroyed although in your case and mine, we're lucky that there was no damage. What's scary is for it to fall onto someone or onto a busy highway and cause an accident. That's what makes me tense whenever I fly. [/QUOTE]
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Inverted Free Fall!!