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RTH didn't RTH

WNYBill

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Showing off my new toy last night. Flew quite a long flight, probably 600 yards to look at a food plot. Used one light on the battery, none on the RC. Pushed the RTH button on the RC and the drone returned but landed 100 feet from the take off point. There was a <20mph wind and it landed down wind from the take off point. I am sure I did something, but what? I had moved from the take off spot but it was the opposite direction from where it landed. Mini 3 pro is new to me and in all the trial flights RHT brought it back and landed within 1-2 feet. What did I do?
 
What did I do?
Showing off my new toy last night.
RTH is not precise BUT is much better with light. You want more exact landings , Almost directly back to the Pad, -- make a hashtag shape out of black tape (or white depending on your substrate), on your pad, The drone will land on it everytime!!
 
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What did I do?
Your flight log should reveal what happened.

You can upload and view your flight log online here. If you'd like others to review it, share the link here after you upload it.
 
Ditto msingers' suggestion but a guess would be that you flew the drone away from the takeoff point before it had sufficient GPS satellites to establish its position and the home point at the take off point.
Then, when it eventually did get enough satellites to establish its position, it was over the landing point and set the home point there.

The log would or should show whether or not that was the case.
 
I am sure I did something, but what?
I think I know, but we'd need to see the recorded flight data to confirm whether my idea is what happened, or if it was something else.
Your flight data will explain exactly why the drone landed where it did.

To post your flight data there are a couple of options ...

1. Go to DJI Flight Log Viewer | Phantom Help
Follow the instructions there to upload your flight record from your phone or tablet.
That will give you a detailed report on the flight data.
Come back and post a link to the report it provides and someone might be able to analyse it and give you an understanding of the cause of the incident.
or
2. Just post the .txt file here
or
3. If you use Airdata, you can view the flight data on Airdata and post a link for the Airdata report

If you are using one of the controllers with an integrated screen, the txt files are to be found here:
Android\data\dji.go.v5\files\FlightRecord
 
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Probably didn't wait long enough for a proper gps satellite lock and recorded homepoint. As you started flying it got the lock and recorded the homepoint as you were flying (100 ft away) at some point. If you were in a wooded area the trees could easily have been blocking enough satellites to get a proper homepoint recorded. As you went up and cleared the foliage, it got the number of satellites it needed. This is all just my speculation and as others have said, the only way to know for sure would be a look at the flight records.
 
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RTH is not precise BUT is much better with light. You want more exact landings , Almost directly back to the Pad, -- make a hashtag shape out of black tape (or white depending on your substrate), on your pad, The drone will land on it everytime!!
I sent you a PM.
 
RTH is not precise BUT is much better with light. You want more exact landings , Almost directly back to the Pad, -- make a hashtag shape out of black tape (or white depending on your substrate), on your pad, The drone will land on it everytime!!
Uum only if the mini 3 has precision landing.
If it doesn't then light levels make no difference since drone uses GPS location only.
If it has precision landing then the take off has to comply with the appropriate rules.
 
Didn't wait long enough for the GPS signal. Flew almost the same route this morning and RTH worked perfectly twice. I just need more practice.
That's what I assumed the problem was. Even experienced folks takeoff a little early occasionally. I wait a quite a while and even go up straight for 20 feet or so, and then pause for a moment to make sure all is good. I find it's usually when you have someone else there is when I push things a little. Slow down, take your time.
 
RTH is not precise BUT is much better with light. You want more exact landings , Almost directly back to the Pad, -- make a hashtag shape out of black tape (or white depending on your substrate), on your pad, The drone will land on it everytime!!
Mini 3 Pro does not have precision landing. GPS location only...
 
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Probably didn't wait long enough for a proper gps satellite lock and recorded homepoint. As you started flying it got the lock and recorded the homepoint as you were flying (100 ft away) at some point. If you were in a wooded area the trees could easily have been blocking enough satellites to get a proper homepoint recorded. As you went up and cleared the foliage, it got the number of satellites it needed. This is all just my speculation and as others have said, the only way to know for sure would be a look at the flight records.
Sounds reasonable since I did the same thing early on…..I never found this drone.
 
Didn't wait long enough for the GPS signal. Flew almost the same route this morning and RTH worked perfectly twice. I just need more practice.
If you flew the drone away from the home point before the drone had been able to establish its location then the drone will have set the home point to where ever it was if and when it did gain sufficient GPS to do that.
Practising that sort of flying won't do any good, unless you include practising the solution, which is to reset the home point to where you want the drone to land.
The flight log will show if you flew away from the home point 'too soon' and if that is the case it is also likely to show WHERE the home point was set to
 
Just a reminder: The Home Point is a set of long/lat coordinates in flat 2-dimensional space, so it doesn't matter whether you drone is on the ground, or hovering overhead when it sets the HP.

If you're in a small clearing with trees all around having trouble getting a good lock on the ground, take off and ascend straight up to 50ft and wait for a lock, and the Home Point set, before you head away from your takeoff spot.
 
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