OK, I'm back................

You have to have some sort of shutoff. I think the guys who've been flying electric stunters have used timers.

It's also quite possible to use the same design concept that's used in all forms of CL racing. A sharp, sudden, full down flick trips a spring loaded lever. In racing, the lever pinches off the fuel line. With electric, the lever flips off the on/off switch.

It would take some adjusting of the mechanism, but they're simple to make.