Figure 9f. A410 fluidfoil impeller made from composite materials with high twist angle ratio between tip and hub Figure 10a. Typical flow around airfoil positioned for maximum lift minimumAgitation 195 Figure 9(. A410 fluidfoil impeller made from composite materials with high twist angle ratio between tip and hub. Figure lOa. Typical flow around airfoil positioned for maximwn lift; minimwn drag