Gas versus glow engine. I have been in RC for a while and have always used glow engines, starting with 2 strokes now mostly 4 stroke engines. I would like to try gas but I am not sure what the trade offs are. In the 26 cc or 1.5 cu. in. size I know the gas engines weights more and gas is allot cheaper than glow fuel but what are the other trade off such as power or thrust, transition time and smoothest. What about over all ease of operation and RF interference. I want to try gas in a Cermark Pitts. What would be a good choice and how would it compare to 140 or 160 4 stroke glow engine?

Thanks for any help
Lee