Generally speaking, the 46 size engines are plenty for that size aircraft. Now, some have more power than others. For instance, the OS LA series have less than their AX series (much less) but are completely adequate for that plane. I had a rather heavy kit while I was working in England, that consisted of EPP like foam, and was assembled with packing tape and duct tape. As I said, it was pretty heavy. I had an Evolution 46 engine on that plane. It was pretty amazing. Had lots of power plus it was fairly easy to fly as a trainer. But because it was fairly heavy, it was somewhat of a handful at landing, but we managed.

The point here is that even as heavy as that plane was, it flew fine with that engine.

I also built a Debonnaire S.P.A.D. a while back and it had an OS 46 FX I believe, (the series I mean, it was an OS 46 but not an AX). It too was heavy, but that engine handled it just fine.

The Hobbico NexSTAR RTF comes wth an OS 46 FXi and that was plenty of power for that larger trainer aircraft (larger than a Hobbico Super Star, for instance, which came with an OS 46 LA).

CGr.