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GPS Tracker or something similar for fly aways
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<blockquote data-quote="Virtual1" data-source="post: 21206" data-attributes="member: 4084"><p>Well there's several reasons for it to be in RTH mode, you have to try for best behavior under many circumstances, including fun ones like "no signal from remote and over a body of water", where a response like "just hover and wait for conditions to improve" may end poorly. I'd like my RTH to make a good effort to do its job if it's triggered. The big thing that worries me is hitting obstacles on the way back, particularly due to elevation settings. I will be testing my Spark's RTH functionality more this spring, though where I live it's hard to find big open spaces devoid of trees.</p><p></p><p>Besides setting the home point wrong (or forgetting to update it) I can't picture what conditions would cause it to just take off in a strange direction. GPS isn't usually wrong - it's either there and good or not there at all - magnetic interference won't affect GPS though it may BLOCK it. Otherwise, a programming bug in the autopilot would be my first suspect.</p><p></p><p></p><p></p><p>I suspect a lot of that is due to losing GPS lock for some reason. At that point the Spark will rely on its downward-facing camera for XY-position. Over water, with its constantly changing texture, it can't get a lock, and so will be at the whim of the airspeed at whatever elevation you're at. Wind speed can be pretty high over bodies of water even at lower elevations, so you could see your drone drift away at 20mph pretty easily. And I've seen a few panic videos where they fools got way higher than they ought to, and found themselves in winds higher than the top speed of their drone. Again I'd like to see a more intelligent response from the auto-pilot when it sees its in RTH and is either not going to make it home before dead batteries or is LOSING ground trying to get back home, and be smart enough to lose some height to get out of the strong winds at elevation.</p></blockquote><p></p>
[QUOTE="Virtual1, post: 21206, member: 4084"] Well there's several reasons for it to be in RTH mode, you have to try for best behavior under many circumstances, including fun ones like "no signal from remote and over a body of water", where a response like "just hover and wait for conditions to improve" may end poorly. I'd like my RTH to make a good effort to do its job if it's triggered. The big thing that worries me is hitting obstacles on the way back, particularly due to elevation settings. I will be testing my Spark's RTH functionality more this spring, though where I live it's hard to find big open spaces devoid of trees. Besides setting the home point wrong (or forgetting to update it) I can't picture what conditions would cause it to just take off in a strange direction. GPS isn't usually wrong - it's either there and good or not there at all - magnetic interference won't affect GPS though it may BLOCK it. Otherwise, a programming bug in the autopilot would be my first suspect. I suspect a lot of that is due to losing GPS lock for some reason. At that point the Spark will rely on its downward-facing camera for XY-position. Over water, with its constantly changing texture, it can't get a lock, and so will be at the whim of the airspeed at whatever elevation you're at. Wind speed can be pretty high over bodies of water even at lower elevations, so you could see your drone drift away at 20mph pretty easily. And I've seen a few panic videos where they fools got way higher than they ought to, and found themselves in winds higher than the top speed of their drone. Again I'd like to see a more intelligent response from the auto-pilot when it sees its in RTH and is either not going to make it home before dead batteries or is LOSING ground trying to get back home, and be smart enough to lose some height to get out of the strong winds at elevation. [/QUOTE]
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