I'm somewhat disconcerted.
There was an article on HN yesterday [1] in which one of the replies to the top comment about AG Bell's attempts at flight said: "The difference is that Bell didn't understand aerodynamics and didn't seem to do a thing about it."
That reminded me about an article I'd read some time back that suggested that even modern aviation experts don't correctly understand lift.
Today, that article is on the front page of HN.