Well, normally the kit or arf will provide a list of engines that will work either marginally (lower sized engines) or very well (larger sized engines) with that particular model.

I've seen a database that showed weights of aircraft and what engines to use (a range of engines because there is a lot to consider, not only weight, but wing loading and so on). I might have it somwhere, and if I do, I'll include it as a picture and upload it, or copy and paste it.

But, for the plane you are talking about, an OS .75 AX would be ideal..

Yeah, yeah, I'm partial to OS engines.. I admit it. But that's because I've had great success with them and they seem to do the job very well.

CGr.