JJB*
Captain
Flight distance : 12132231 ft
Netherlands
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MartinPHanley Posted at 12-30 13:21
Here's an air data link to the flight record :https://app.airdata.com/share/vcTSXB
I didn't take off until I had a GPS lock and a home update. I get that reinforced concrete and high winds can cause issues, but Im 99.9% confident that we weren't on reinforced concrete (could be wrong but I don't think my father put concrete under the flagstone patio he built.. not something he typically does). I'm not trying to point fingers, just trying to figure out honestly if I did something wrong to cause an issue.
Hi Martin,
Had a look at your flightlog too, happy to read that the Mini is back home after this "interesting" flight.
Seen many more 'fly-aways' on this forum for the mini, some things in common. Often when a MINI starts with no good GPS lock, and after a lock in flight things goes wrong.
First i see that at takeoff you did not had a GPS lock. 6 Satellites and no reception, so after takeoff your mini used the bottom sensor to keep position ; not by GPS.
After 13.3 seconds HomePoint was recorders (8 sats + 4 for reception). flightmode now P-GPS.Climb to 35 meters and suddenly craft moved away, this after some input just before that.
Trying to correct by forward input (after 100% back first), but craft moved away.
Question is why ?
Could be due to yaw/compass/imu error or due to somthing else.
While craft drifing away heading 270 the nose of the craft towards HP approx.
At 45s into RTH (by you)...drone hdg 45, to home is hdg 91.
6 seconds alter craft aligned heading towards home, but drifting backwards with 15m/s, pitch down 25 degrees!
At 1m5 seconds (after still flying backwards but craft pointing home) suddenly it started to fly in the good direction!!
But still with nose pitch down (about same angles).
Only explanation for this is less wind. With the same power now it can fly towards home. see my charts.
So i think your drone had a 2 errors ; one small yaw and lots of wind too.
chart1 is outbound in RTH, chart2 is inbound in RTH. (blue line coloured like this when no user RC input is given)
In chart 2 you see the purple line change heading, this aligning to homeheading in RTH.
I think because of the RTH you craft made it, with a yaw error and no RC input normally craft would fly a toilet bowl move line, depending on the amount of yaw error a smaller of bigger 'circle'
cheers
JJB
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