I am thinking about a goldberg ultimate bipe and was wondering what engine people have used on them. I have a GMS .78 and an ASP 1.08. I was also thinking about a 91 four stroke or 2 stroke. Which engine would be the best.

Rick

I fly a ST 90 in mine. It's great but wont hover it. The best one I've flown was YS 1.20 powered. I have a fiend with a 1.08 in his. He goes easy on it so it's hard to tell what it will really do.
David

When I had mine,I had a 120 os surpass up front.I totalled the plane on an inverted flat spin to the runway.my mistake,the plane was great.But I would not power it with anything less.No experience with the 108,but would use it if that's the most powerful engine you have.This was a long time ago and I built the plane with a single servo driving all 4 ailerons.dont do this mistake if the kit/plans call for this set up.Put one in each lower wing half.

Mine was great with the ASP108. Good combo.

I have a YS120FZ in mine. Being the sport flyer that I am this is more than enough engine.

my friend have two, one with os 120 4 stroke with the supercharger and the seconed with saito 150, he says it's reaaly great with the saito, hang on the prop on less than 1/2 throttle.