@HN39
Would the distribution closer to the wing be more even (i.e. closer to a constant downwash velocity across the span)?
Hi HN,
You are right of course; the picture didn't say how far back and I didn't think it through. Write in haste, repent at leisure.
Close up to the wing the downwash will reflect the span loading which may or may not be a constant downwash -but then a constant downwash would not give any shears.
@awblain
As you see, my posted comments were unsound - my apologies.
However I still believe that you cannot generate rotational flow by the action of linear shears
PS - I wonder how many points I lose from that brick
