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Experienced a Spark fly away for the first time. crapped in my pants a little
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<blockquote data-quote="JD4x4" data-source="post: 10175" data-attributes="member: 33"><p>I'll be interested to see if this post survives (dreaded "mod" talk), but ..</p><p>I know someone who launches in an NFZ all of the time (their yard, with a modded Go4 & AC f/w).</p><p></p><p>They have only tried RTH one time in this NFZ because the one time they did it did a similar "runaway" happened, with the Spark flying away from the home point rather than to it. The home point WAS set/updated prior to take off. I'm not sure what role the compass plays in navigating from one gps coordinate to another, or how long it would take before correcting itself (or if it even would) when following a compass bearing while the gps coordinate differences kept increasing.</p><p></p><p>The conclusion they drew from that (and it's pure speculation until they test more) was that somehow the navigation logic tries to avoid flying through a NFZ when it's in RTH mode. In this case, it wouldn't have been logically possible to avoid the NFZ because the home point was within the NFZ. Now, if this turns out to be true then it's a substantial logic flaw, imo.</p><p></p><p>..Just things to think about, and experiment with. Of course none of this applies to the original post if it never regained gps while returning.</p></blockquote><p></p>
[QUOTE="JD4x4, post: 10175, member: 33"] I'll be interested to see if this post survives (dreaded "mod" talk), but .. I know someone who launches in an NFZ all of the time (their yard, with a modded Go4 & AC f/w). They have only tried RTH one time in this NFZ because the one time they did it did a similar "runaway" happened, with the Spark flying away from the home point rather than to it. The home point WAS set/updated prior to take off. I'm not sure what role the compass plays in navigating from one gps coordinate to another, or how long it would take before correcting itself (or if it even would) when following a compass bearing while the gps coordinate differences kept increasing. The conclusion they drew from that (and it's pure speculation until they test more) was that somehow the navigation logic tries to avoid flying through a NFZ when it's in RTH mode. In this case, it wouldn't have been logically possible to avoid the NFZ because the home point was within the NFZ. Now, if this turns out to be true then it's a substantial logic flaw, imo. ..Just things to think about, and experiment with. Of course none of this applies to the original post if it never regained gps while returning. [/QUOTE]
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Experienced a Spark fly away for the first time. crapped in my pants a little