I am flying my UCD 46 with an Evolution NT 46 from Horizon with a 12.25 X 3.75 APC prop and it flies just great. I am just starting flying power planes and I am having a ball flying it. The reason for the engine selection was strictly a test. I work at a hobby shop and we wanted to see how the combination performed. I had one of the 3D pilots test fly it and he was able to do harriers and hovers with very little difficulty. I think a .61 would be a good combination as well. We plan to put the new Evolution .61 NT as soon as we get them in. The total weight of the plane is 6 lb. 4oz. with no fuel.
jef