I was interested in two recent articles, one in the Special Issue and one in the previous issue both referring to swept wings. The first was about the aerodynamics of swept wings, the second about the trouble Tony Nijhuis had with the tractor prop version of his Vulcan. Way back in 1955 / '56 I did an honours thesis at Bristol University with a fellow student on the aerodynamics of ailerons on a swept wing. Although Dave Burton's recent article correctly refers to the completely different aerodynamics at supersonic speeds he did not refer to the different aerodynamics of swept wings compared to straight wings at subsonic speeds. Straight wings, as in trainers, generate lift from a span-wise vortex, which ends up as wing tip vortices flowing back at right angles to the wing span. The air in-between the wing tips flows more or less parallel to the chord. The vortex gets stronger as the angle of attack increases, with the air continuing to flow parallel to the chord. This continues until separation at the stall.
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