I have a gms 120 and was wondering how well this engine would be in the edge!

There are several Edge's out there.
Could you be a wee bit more specfic, please?

Thanks,

Sorry I guess that was a poor message!
I was thinking about the Hangar Nine 120 size Edge 540

That engine would be jjuuuussssssstttt barely enough power for that plane to take off, fly pretty much level, and land again. If you want more out of the H9 edge, you need a little bigger engine. I have an OS 1.60 on my H9 Cap, and I would not say that even the 1.60 is over powered. the H9 120 sized ARFs come out a little on the heavy side, and the 120 number should have been 140 on the side of the box. If you are not looking for performance, and just want to get the plane in the air, the 120 might do, but you will be moving up soon.