What airfoils does the airplane use?
The RAVEN uses six different airfoils. The main wing uses the DAE11, DAE21, DAE31, and DAE41 airfoils, all of which were invented by Professer Mark Drela of MIT for the Daedalus. Each airfoil is designed to operated in a specific flow condition along the wing. Specificity, the airfoils are matched to the local Reynold’s number (Re). At the wing root where the Re is highest, the DAE11 is used. Airfoil Design Re Span Location DAE11 750,000+ 0 – 25 ft DAE21 500,000 40 ft DAE31 250,000- 52 ft DAE41 wing tip wing tip The DAE41 is a special airfoil used at the wing tip. The airfoils are spaced along the span matching the local Re. The airfoils are smoothly blended from one shape to another. That is, there is only one location on the wing that is actually DAE21, DAE31, or DAE41. At span location 32, the airfoil is half way between the DAE11 and DAE21 in shape. The DAE51 is used for the propeller. The tail surfaces use the WMF09 airfoil. The WMF09 is a reduced thickness WMF15. The WMF15 was de
