ORIGINAL: RCKen
SuperAirborne,
Increasing speed and vertical performance are almost totally opposite things. If you increase your speed you lose vertical performance, and vice versa. There are always trade offs when selecting props. What you need to do is decided which is the most important to you and then select a prop accordingly. As was said before, higher pitch props give you more speed and lower pitch props give you more pulling power for vertical performance.
Ken
Thanks! I know that there are trade offs! To be honest, my question was answered in the very first replies to this post, viz pitch = speed and diameter = verticle, and you basically have to trade one off for the other.
Thanks for all the responses, though!