This airfoil is part of the replacement series that Eppler made for flying wings. The E 222 - E230 replaced the older E 174 - E182 series. It turns out that the E226 has a lot in common with the newer airfoils, though it’s originally thicker and the camber is quite smaller. Together with the comparison of MH 32 and Joe Ruth’s NACA 4410 modification this is the beginning of showing you, that many of the newer airfoils are almost identical, they just looks different. If you change the camber and thickness of the E 226, so it resembles the MH 32 or SD 7037 camber and thickness, you can hardly tell the difference, and as Reinhard Kaufmann showed in Aufwind 1/2000, even the pressure distribution turns out to be almost identical.