I am not sure, from reading all of the posts in this thread, if a constant 18% thick wing is what is being discussed here or an 18% tapering to 15%. The 18% AS5048 was originally designed to be used as the root airfoil of a wing that tapered to the 15% AS5045 airfoil at the tip. According to Ashok, the 15% and 16% airfoils are well suited for use in single airfoil wings. I don't remember any discussions about using the 18% in any configuration other than as a root airfoil tapering to a 15% at the tip.
Steve Eberhart Building an RV-7A but I still have the original AS504x wind tunnel models in the attic. Allen Wiesner wrote: >>What is so the 18% Airfoil? >> >> > >Don > >That is one version of the new low-drag wing, see >http://www.krnet.org/as504x/ >There are two versions, one is commonly called the 16% airfoil and is for >people who already have their spars built; and the other (the 18%) is for >new construction. It's advantage is a taller spar which is somewhat >stronger and also gives more fuel tank room. > >Allen G. Wiesner KR-2SS/TD S/N 1118 >65 Franklin Street >Ansonia, CT 06401-1240 > >(203) 732-0508 > >flash...@usadatanet.net > >
