Df,

I had a 8ft Telemaster made out of foam (used as a paintball target) that weighed about 12lbs and the plane flew OK with the 18cc Weedeater. I later put a 21cc weedeater and it flew a little better. From what I've been reading about electronic ignition, the plane would have flown better if it had EI or as a Gas/Glow conversion. EI would have dopped maybe 6-8oz. and gas/glow would have dropped about 16-18oz. and either would have increased the power. Build it as light as you can and I think it will fly fine.

Ernie S.