ORIGINAL: mbrennan1
I had a 46ax with an 11x6 apc, in a Sig FourStar. It flew the plane nice, but really struggled on climbs and power maneuvers. I then installed a 55ax, with a 12x7 apc, and could not believe the difference!!!! Not endless, but great vertical climbs, and can handle almost anything. Handles great in the wind. The 55ax is a great engine.
Remove the 12x7 and put an 11x5 apc on, then hang on. It will be fast, go up untill out of sight or radio range, and go up fast!
I put the 55 on my 4*40. Started with the 11x5, tried a 12x5 zinger. Plane had noticably less verticle performance and slightly less speed. Let that baby spin up into its power band!
No highjack intended. We will now join our regularly planned broadcasting.
This does look like a fun plane!