8.5 lbs, 775 sq/in wing area, 25 oz/sq.ft. wing loading are the specs listed witht the plane. It isn't really a matter of my plane, just in basic performance, what gives faster speeds? ex. Say a 14x8 spinning 10,000 rpm makes a plane go 50 mph. Then say a 12x10 spins about 10,000 rpm also Which is faster? Kind of weird question I know. It may not have a simple anwser. Is the 12x10 faster because of the greater pitch even though it is the same rpm?