About a year ago I set up a flying wing and spent a couple of days tuning and tweaking, since then it has given me 20+ hours of beautiful flight. Today as I threw it the prop adapter came a bit loose, so with no power it just came down a few meters away, hard but not hard enough to break anything.
After tightening the prop adapter I was about to throw it again when I noticed that the elevons were no longer doing elevon mixing, and my flight mode switch was not doing what it should.
I eventually discovered that every single parameter had been reset to the default values… how is this even possible?!?
I found some other similar cases, none of which seem to have any resolution:
Anyway since today’s plans with that plane are totally wrecked, I will instead spend the time going around to all my other planes and backing up their settings!!!