A few weeks ago I lost my first Viggen so I build a new one, maidened it today and lost it again, BUT this time I had a GPS tracker in it and found it in less than 10 minutes.
So what happened? For launch I had set the Aura to launch assist. After launch, for no apparent reason, I only had throttle control but not over the elevons. Once I noted that, I cut the throttle and saw it disappear behind a treeline. The Viggen sails beautifully so after the treeline it sailed into a corn field. Almost no damage other than a bruised nose, which is still good to fly.