Hi,

There is simple example and tested manufactured experiement = MVVS.
MVVS 26-Gas and 26-Glow have the almost same weight, deliver the same power
and in fact seem to be more benefited from Reson.Exhaust than OS160, i.e. the
whole debate gets near to F3A class. Still most of the F3A folks fly Glow, and
then some fly Electric and almost nobody fly on Gas. Conclusion seem obvious
from performance point of view - for me Gas makes very good sense for the
displacements like 80cc or more. For less than 50cc, better stay on glow.

Just we are just debating that on another Discussion and that might save
some time here:

http://www.rcuniverse.com/forum/fb.asp?m=6218653

Well, my own choice goes after cost-and-comfort i.e. : Depending on the
Cost-of-Fuel (Ready or Home-made) and also the Ignition sys.Cost, there
is a "Gray-Scale-Range" of 20-40 cc where everybody's opinion is correct.

Cheers,
Nick