ORIGINAL: maddieone
I agree with Steve, any engine that is bigger than an OS 91 is too much for this ARF and unless you plan on 3D'ing (perish the thought) you don't need a bigger engine. A lot of guys have already flown this bird with the 91 and they are both pleased and comfortable with that combo. The kit version as with most of Top Flite kits come out way heavier than this ARF. I have a Hanger 9 P51 with similar weight and dimensions and usually fly it at half throttle.
Curt
OK... thanks. i'm assuming you are referring to a 4stroke.
my plans call for an OS 120 4stroke and looking at the weight, they are quite a bit heavier than a saito 125. i had a line on a 125 so that's why i was thinking that one.