Generators used in high altitudes

I am a RC pilot and if I were to take one of my planes tuned at 5000 ft and try to fly it at 10,000 ft, it wouldn't run worth a dang. The adjustment isn't much, the advantage is huge. You would be surprised how much more power you have to hang on the front to get the same as you would at sea level.

Also running a generator rich will foul the plug and clog the spark arrestor faster. Champions high altitude jet is only good for 3000 ft unless they changed something.

I live high altitude, I camp twice that. Been there, done that. ;)