I tend to opt for the traditional
dart Rufus as favoured by Barnes Wallace, who I believe once claimed it to be the most perfect aerodynamic shape possible? One tip I would advise though is to give the trailing edges a slight upward angle to improve slow speed pitching stability.

An an aside I have often wondered when the first paper dart/plane was made and flown, given that model aircraft were flying long before manned flight and paper was available from arond the same time it must have occured to someone at some point to give it a try?
