I'll go back to what I've said before, not only in this thread. Generally, a prop of "typically normal size" like a 10-7 for a 46 size trainer engine, is a pretty good bet. However, more often than not, a pilot can have a small collection of props of various sizes and swap them out to get the best fit for the flying style, airplane configuration including weight, and the variables that may or may not be assumed in most of our aircraft.

Still, the manufacturers of, say Hobbico NexSTAR, put a prop on the plane based on what is most likely to fly well. And for a trainer, it probably won't make much difference until the student pilot gets more proficient.... he or she will never know the difference.

CGr.