> >What about the different tip shapes being used these days. Does that help in >reducing the tip sound on props of bigger diameters? >I'm not sure of this question as well, I have heard of props that have >multiple pitches set along the blades that work better at different RPM's. I >understand that most fixed pitch propellers have a constant pitch along the >blade. >Brian ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Most prop manufactures make claims that their prop shape / tip / airfoil / etc. is more efficient than a competitor but I've seen or heard of very few head to head comparisons to prove the point. As far as blade pitch, I think if you look at any fixed pitch prop you'll find the pitch much greater at the base than at the tip. Walk the line the next time you're at the airport and check it out. Larry Flesner
