RE: understanding prop size on my saito powered rambler 45----help
I had the 82 on my WM Mustang (similar to the rambler, I had that too) I tried several different props on it. I found that the APC 13x6 worked the best for 2 blades. Good speed and power combo, decently slow for landings. If I went to a 14x6 or a 13x8 it would work, but I wouldnt get as High rpms, and the range of the high speed needle became really small and hard to tune. I thought it really odd, because I had the engine on the Funtana 40 before, and it loved running with a 14x6 or 15x4W on that plane.
I also had really good results with the Master Airscrew 3 Blade 12x6.