I was under the impression (from what I learned about how planes fly) that the spirals were actually a bad thing since energy was lost to turbulence via those (and hence why commercial jets have winglets on their wingtips) and the good part is the laminar flow of the air over and under the wings.
I was under the impression (from what I learned about how planes fly) that the spirals were actually a bad thing since energy was lost to turbulence via those (and hence why commercial jets have winglets on their wingtips) and the good part is the laminar flow of the air over and under the wings.
Is this not so in animal flight?
https://en.wikipedia.org/wiki/Prandtl-D
Thanks, the paper linked from that Wikipedia entry is very interesting.