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> Why does the air have to transit in the same time period? Because otherwise it would leave holes in it where one side moves too fast before joining back up.
by jstanley 2y ago
> Why does the air have to transit in the same time period?
Because otherwise it would leave holes in it where one side moves too fast before joining back up.
It makes more sense if you imagine air to be incompressable.
- agos 2y agoair being incompressible makes even less sense, given how daily the experience of compressing air is
- ejolto 2y agoBut the air does move faster above the wing without joining back up with the air moving below the wing, see the video jgord shared https://www.cam.ac.uk/research/news/how-wings-really-work https://www.cam.ac.uk/research/news/how-wings-really-work
- FabHK 2y agoNot at all. Imagine two roads, parallel mostly, but then one takes a detour, like this: ____ ____/ __ \____ -> _____/ \______ _______________ -> _______________ Now imagine them full of cars, bumper to bumper. Now imagine the cars move, at the same speed, on both roads. Same number of cars will come in on the left as go out on the right. The cars will be bumper to bumper, both on top and below (there'll just be more cars on top). Why should cars that come in at the same time on the left exit at the same time on the right?
- jstanley 2y agoThe air was already there, the wing is being pushed into it, it seems to me that when the wing has passed it needs to end up all touching the same pieces it was before otherwise the wing will leave gaps in the air.