How to make a paper plane.

This is a video from me.  It is how to make a paper plane.
It explains about thrust, weight, drag and lift. and now you will know a few new things,
 and also know how to make a paper plane.

I coped this sentence of google.


Despite the discomfort—and fear—it induces, turbulence is essentially just a "rough patch" caused by wind, thunderstorms, the jet stream, proximity to mountains, and other factors.