I have gone to Tony van Roon's website, http://www.uoguelph.ca/~antoon/hobby/props.htm, dealing with props but I have more questions then he provides. I realize that the higher the number of the pitch, the second number, the faster the plane will go, but have less power for takeoffs and stunts. What happens when you increase the length of the prop? I believe the RPM's will go down but what else will happen? When the RPM's go down, does that mean less power and speed then?