[axiolite]

That's a terribly oversimplified explanation. May I recommend this one instead:

https://www.nasa.gov/sites/default/files/atoms/files/foam_wi...

When learning about flight, keep asking yourself "Then how do planes fly upside down?" Any explanation which does not mesh with sustained, inverted flight is oversimplified to the point of uselessness and inaccuracy.

[jadyoyster]

Actually meant to post this link, sorry! https://www.grc.nasa.gov/www/k-12/airplane/wrong1.html