Kloo Gee
First Officer
Flight distance : 16783757 ft
United States
Offline
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Stu,
Good job on rescuing your Spark and getting it landed without crashing it. I've mentioned it multiple times in past threads and videos I've created that when you get into an emergency situation such as this, the best course of action isn't always to bring it back home to the starting point, but instead to find a safe landing zone close to where the AC is currently at. You did well with this and as such still have your Spark in one piece. Good job.
Having said that, looking at your logs, it looks like during this flight there were 2 separate incidents where compass and yaw errors occurred.
The first event occurred from the 1m 2.4s through 1m 57.7s where these errors were happening. The AC was only about 15ft off the ground and 122ft away when the errors started. It floated around without any input from the controls for about 55 seconds while it was still under 14-15ft off the ground (my guess is there was sloping terrain as VPS only shows 4.6ft) and ended up 286ft away when the errors went away and it got control of itself.
At that point, it looks like you decided to continue flying and as you mentioned in your original post decided to start recording at the 2:17 mark and went from under 15ftft up to about 75ft when the compass and yaw errors kicked in again about 30 seconds later at the 2m 32.4s mark.
I don't have an answer for you in regards to exactly what caused the Compass and Yaw errors. Hallmark007 had mentioned some of the potential sources. Looking at your flight environment via Google Maps and Google Earth, it seems like it would be a great place to fly. However, I don't think we will be able to give you a solid answer as to the exact cause.
However, for your future flights and for anyone who reads this, I would highly recommend in the future if you get compass errors, go into ATTI mode, and are able to get control of it: LAND IT ASAP. Do NOT continue with your flight to try to get that video or picture you originally were going for. Land the aircraft, check it out and try to investigate what could have potentially caused the problem.
I have seen many people make a similar choice to what you did (continue flight after errors) and were not lucky enough to be able to get it under control to be able to land it the 2nd time it went ATTI in the same flight.
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