RE: PROPING ENGINES TO RUN IN THERE POWER BAND
I agree that most of the rpm numbers posted by a mfg give the rpm range for that engine. You can look at the peak RPM to find out if it like to rev or torque. Some of the actual power figures are misleading.
I have found a few props that just make an engine really make a noticeable power increase. My goal now is to find the prop that each engine makes noticeably better power. Then consider the airframe as you can try more props to find the best for your taste. I enjoy the whole process. When you find the perfect combination it is very rewarding!
turbo