Created by Tommie Berry , tommie@berry.org , (925-980-1021). This FeatureScript creates a 2 blade propeller. You have 4 Planes 2-5 for 1st blade and 6-9 for 2nd blade at distances D1-4 . You have 4 NACA-4412 to loft through for each wing. It creates Sketch 2-9. The chord width is specified by c1-4. The hub has 3 parameters : (hubR=Radius of Hub, hubH=Height of Hub, hubA=Hole Radius in the center of Hub).