4 ms·
Nonsense. See here: https://www.av8n.com/how/htm/airfoils.html#sec-fluid https://www.av8n.com/how/htm/airfoils.html#sec-fluid
by camperman 10y ago
Nonsense. See here:
https://www.av8n.com/how/htm/airfoils.html#sec-fluid https://www.av8n.com/how/htm/airfoils.html#sec-fluid
- ajross 10y agoYeah, that site is indeed one of the worst offenders. Try a fluid dynamics textbook. I genuinely don't think you understand what I'm saying. Air isn't magic fairy dust that pushes on airfoils from a distance. Pressure is impact.
- camperman 10y agoIf you hit a slice shot in tennis, the ball will travel considerably further because the backspin produces circulation which generates lift. If air was a bunch of bullets, the effect wouldn't happen at all. If you raise a spoiler on a Grob's wing, its lift-producing capabilities drop considerably because the spoiler interferes with the circulation. If air was a bunch of bullets, a spoiler wouldn't do anything. > Air isn't magic fairy dust that pushes on airfoils from a distance. No. Like I said, it's a fluid that has pressure and velocity everywhere. At low enough Reynolds numbers, like for model gliders, you can even get away with treating it as a non-compressible fluid with decent results. > Pressure is impact. And contact between two objects is really about Pauli exclusion surfaces at the atomic level. So what?