don't get me wrong, I love my electric planes but...I've been wanting to get into larger models and for the cost to get I big brushless motor ESC and 4+ cell lipo would be more then buying a gas engine. I'm looking at planes with 80" + wingspan and more for scale like flight then aerobatics. http://www3.towerhobbies.com/cgi-bin...&I=LXLWH2&P=ML something like that. which brings me to my question. on the 4 stroke motors, are they running regular "pump" gas or still model fuel? do they have spark plugs and valves like a traditional gasoline motor? my questions may sound dumb to some but if there still running the same fuel, and still basically a glow motor, why would you run a 4 stroke? is there any model engines that run regular gasoline? I look at it like $3.95 a gallon vs $34.00 a gallon.