Aerodynamically contoured, low drag wing, engine and engine nacelle combination

摘要

A nacelle mounted directly to and above a wing so as to extend forwardly therefrom. The wing has a critical zone, which includes an area in the airstream flow about the wing where either of the following conditions occur: 1. The local pressure coefficient in the airstream has an absolute magnitude greater than 0.05, 2. The airstream flow about the airfoil is supersonic. The nacelle has a critical surface region which is a side surface portion of the nacelle adjacent to a forwardly swept portion of the wing. The critical contour area of the nacelle surface is that portion of the critical surface area that is within the critical zone. The critical contour region of the nacelle is shaped to be in alignment with a plurality of airfoil streamlines that are immediately adjacent the critical contour area. Other surface portions of the nacelle are out of alignment with adjacent streamlines and correspond more closely to the engine structure contour.