Glow engines caome in all sizes, i have 3 electric planes converted to glow, and toodle about the sky but you still got that nice sound of the engine...

if you want small search for the "baby bee" a 0.49 glow engine or the smaller 0.10 "pee wee"

i found a little somthing here for you to see what im talking about, great little engines i love em ...

not as much as the big 4 strokes though

[link=http://www.airfield2000.com/engines.html]small engines[/link]