I have an interestering thing I am observing.
I spent a lot of time PID tuning and have my plane performing extremely well on some flights, but not on others.
It seems that about one in every 3 or 4 flights, the plane hunts back and forth along the waypoint line.
Normally, it closely tracks the waypoint line very accurately.
I am not changing any parameters between flights, its even the same flight plan in the latest case.
Here is the record of yesterdays flight, you can see it flys straight to each waypoint with very little tracking (mostly wind is affecting it).
Then today I flew the exact same mission and this was the result.
I cut short the second mission and returned home.
I only have APM logs if they are any use, but I'm wondering if this is something others have experienced and if there is something obvious I might be missing.
Replies
Yes, this still randomly happens for me.
When I get it, I simply land, reset the APM again and then takeoff and more often than not its fine. If not then I land again and try again.
It is very strange.
Franco, I thought at one point that it might have been caused by the airframe not being correctly level during the initialisation, check this as it will cause the same issue. I have subsequently discounted this theory.