Good point, Banktoturn! The tip vortex that produces induced drag also produces induced angle of attack by dumping air on top of the wing. This downwash requires the wing to operate at a higher angle of attack to generate the required lift. The lower the aspect ratio the larger the percentage of the wing that will be in the tip vortex downwash. For very low aspect ratio wings with an aspect ratio somewhere around one or even lower, the whole wing is operating in the down wash. Not only that but as the angle of attack gets larger the downwash angle also gets larger so that it can seem like the wing won't stall even when at an angle of attack of 20 or 30 degrees. The SST lands at such a high angle of attack that the nose section of the fuselage has to be drooped down for landing so that the pilot can see where he is going. The Space Shuttle also lands with an extremely high angle of attack.