[QUOTE=newtonsfirstlaw;3204]
Another trick I learned from airplanes which the designers of the aptera seem to have learned is that you put the trailing edges of airfoils next to the leading edges of other aifoils. See this
plane.
Nice site, but I don't see anything about paired airfoils except a line about the ailerons being a few thou thicker than a pure contour would have them. I don't recall tandem shapes on the Aptera, either. Two optimum shapes would not have a beneficial interaction, but using them might reduce surface area and skin friction.