I lost my first plane that way. Dead reciever battery. I forgot to shut the reciever power off after charging it. I drove to a buddys house in the country to fly it 45 minutes away. The failsafe position was all flight surfaces neutral with a touch of left rudder. But as the engine ran the nose became lighter and lighter. We followed it in a car, as it climbed higher and higher cycling in the sky. It sounded like a mosquito in the bedroom at night.
When it ran out of fuel it was up there, but without the engine sound I couldn't find it. Until it was quite low, coming down like a lawn dart.
I salvaged the tail, a damaged wing. Most of the radio gear.
I didn't try it again for 15 years. I joined a club. Signed up for their flight school. Learned how to fly. Crashed a couple planes. Became an instructor. Taught for a couple years. Had an absolute blast. I dabled in aerobatic competition before I gave it up for my second marriage. (Crashed and burned) took it up again after the economic melt down to take my dad out flying. Now a days we fly Styrofoam planes with electric motors out of China. I have 4 or 5 of those. But we havent been active for a couple years. his health and lack of time on my part.
I have a basement full of stuff, 6 or 8 wood Models. A 1/4 scale Edge540, thats all carbon fiber and foam, I completely scratch built. 75"wingspan, 45cc chainsaw engine, that I converted. It was a lot of fun.
I don't know what to dovwith all of it.. haven't touched it in years.