Perspective can be very deceiving. The airplanes that I fly are all about the same size 50-70 inches(not including my 30% Yak ). I fly at the same field every week and I have set points of references. I find myself flying with the planes out at about the same distance so their size is about the same. When I fly my small UMX PT-17 ( love that little plane) I also find myself taking it out to where it is also the same SIZE . As the trees around the edge of the field are quite far away they add no perspective to the size of the plane. It is only when I am about to touch down and the runway seems to swallow the micro plane do I realize how close I have been flying the plane.