Aerodynamics of Flight

Elliptical wing Regular wing Moderate taper wing High taper wing Pointed tip wing Sweepback wing Figure 5-33. Different types of wing planforms. aerodynamic characteristics of the wing. The first is to effect A decrease in aspect ratio will give a corresponding increase a change in the aspect ratio. Aspect ratio is the primary factor in drag. It should be noted, however, that with an increase in in determining the three dimensional characteristics of the aspect ratio there is an increase in the length of span, with a ordinary wing and its lift/drag ratio. An increase in aspect corresponding increase in the weight of the wing structure, ratio with constant velocity will decrease the drag, especially which means the wing must be heavier to carry the same load. at high angles of attack, improving the performance of the For this reason, part of the gain (due to a decrease in drag) is wing when in a climbing attitude. lost because of the increased weight, and a compromise in 5-21