I built a Mini and have a Magnum 62 FS which is more than adequate power for this airplane. It is fun to fly and is really good looking. I strongly urge you to read Harry Higley's Bipes book before building, and that you modify the inter wing struts, which he specifically tells you how to do. I built mine according to the plans and the struts were a constant source of aggravation and bother (this may be and indication of my building skills), so I tore the wings open and rebuilt them as he reccommends. No more aggravation.