Hey all, I scratch built a bi-plane that weighs 8 pounds. It has a wingspan of 70 inches. The wings have flat bottoms, so it is nothing fast. I just want it to have enough power to have nice, relaxing flights. I would also like to stay with 2-stroke power because of price. All of my other planes are .40 sized or smaller, so after this plane is gone the engine might not get used again. Also, if it doesn't fly very well, I won't be breaking an expensive 4-stroke. I have heard that 65 la's and 65 Sportsters turn large props, but are they powerful enough for the weight? Or do I need to go to a 90 size engine? I'm open to any brand, what would you pick? Ross