Wing loading on this plane is going to be high compared to what I am used to and that is a concern of mine. They recommend a .91 for it but (I am guessing here) the plane is going to fly like a scale warbird with that engine, along with the inherent problems that warbirds have. I am powering mine with a OS 1.60 (not that I am recommending that engine) because of the balance issues and the fact that I am looking for speed. I am hoping for 120 mph but willing to settle for 100 If you have to add weight to the front of the plane, it might as well be engine. (My opinion only)