js3,

Good point. I took Randy's question to refer to the straight, but the best overall choice for pylon racing might need to account for induced drag in turns. I don't have data on the effectiveness of different tip shapes for induced drag reduction, but I tend to be a little skeptical of some of the claims I have seen. Winglets, if they are allowed, would be promising, but I don't know about other shapes, such as Hoerner tips.

If you really want to reduce induced drag, the tip shape is not the place to look.

banktoturn